DiaMedica Therapeutics Inc

Overview

We are a clinical stage biopharmaceutical company committed to improving the lives of people suffering from serious diseases. DiaMedica’s lead candidate DM199 (rinvecalinase alfa) is the first pharmaceutically active recombinant (synthetic) form of the human tissue kallikrein-1 (KLK1) protein to be clinically studied in patients. KLK1 is an established therapeutic modality in Asia, with human urinary KLK1, for the treatment of acute ischemic stroke and cardio renal disease, including hypertension. We have also produced a potential novel treatment for severe inflammatory diseases, DM300, which is currently in the early preclinical stage of development. Our long-term goal is to use our patented and in-licensed technologies to establish our Company as a leader in the development and commercialization of therapeutic treatments from novel recombinant proteins. Our current focus is on the treatment of acute ischemic stroke (AIS) and currently, to a lesser extent, cardio renal disease (CRD). We plan to advance DM199, our lead drug candidate, through required clinical trials to create shareholder value by establishing its clinical and commercial potential as a therapy for AIS and CRD. In September 2021, the FDA granted Fast Track designation to DM199 for the treatment of AIS where tPA and/or mechanical thrombectomy are not indicated or medically appropriate.

AIS and CRD patients suffer from impaired blood flow in the brain, kidneys, and throughout the body. Many of these patients also exhibit lower than normal levels of endogenous (produced by the body) KLK1 protein, which is produced primarily in the kidneys, pancreas and salivary glands. We believe treatment with DM199 could augment endogenous KLK1 to enhance the function of the kallikrein-kinin system (KKS) to preferentially relax smooth muscle cells in ischemic arteries, thereby vasodilating these arteries and increasing blood flow and oxygen.

We are currently conducting our ReMEDy2 clinical trial of DM199 for the treatment of AIS. Our ReMEDy2 clinical trial is a Phase 2/3, adaptive design, randomized, double-blind, placebo-controlled trial intended to enroll approximately 350 patients at up to 100 sites globally. Patients enrolled in the trial will be treated with either DM199 or placebo within 24 hours of the onset of AIS symptoms. The trial excludes patients treated with tissue plasminogen activator (tPA), a thrombolytic agent intended to dissolve blood clots, and those with large vessel occlusions. The study population is representative of the approximately 80% of AIS patients who do not have treatment options today, primarily due to the limitations on treatment with tPA and/or mechanical thrombectomy. The primary endpoint of the ReMEDy2 trial is physical recovery from stroke as measured by the well-established modified Rankin Scale (mRS) at day 90, specifically recovering to an mRS score of 0-1 (mRS range of 0-6). We believe that our ReMEDy2 trial has the potential to serve as a pivotal registration study of DM199 in this patient population.

We voluntarily paused participant enrollment in the ReMEDy2 trial in May 2022 to investigate three unexpected instances of clinically significant hypotension (low blood pressure) occurring shortly after initiation of the intravenous (IV) dose of DM199. The acutely low blood pressure levels in the three participants recovered back to their baseline blood pressure within minutes after the IV infusion was stopped, and the participants suffered no injuries. On July 6, 2022, we announced that the FDA placed a clinical hold on the investigational new drug application (IND) for our ReMEDy2 trial, and the clinical hold was subsequently lifted in June 2023. In our request for lifting of the clinical hold, we submitted to the FDA in-vitro data supporting that the cause of the hypotensive events was likely related to switching to a new type of IV bag for use in the ReMEDy2 trial, as well as results of an additional in-use, in vitro stability study of all of the materials and equipment used in the IV administration of DM199, which included testing the combination of the IV bag, IV tubing and mechanical infusion pump, to further rule out any other cause of the hypotension events. We also modified the protocol to mitigate the risk of future hypotensive events, including a reduction in the DM199 dose level for the initial IV dose to effectively match the well tolerated IV dose administered in the ReMEDy1 trial.

Concurrently with performing the requested in-use study, we also conducted a Phase 1C open label, single ascending dose (SAD) study of DM199 administered with polyvinyl chloride (PVC) IV bags used in the ReMEDy2 trial. The purpose of the Phase 1C open label SAD study was to confirm, with human data, the DM199 blood concentration levels achieved with the IV dose and further evaluate safety and tolerability. We also included a cohort of hypertensive patients being treated with angiotensin-converting-enzyme inhibitors (ACEi) prior to enrolling. All ACEi patients received the full IV dose at the 0.5 µg/kg level with no instances of hypotension. We believe that these results provide further assurance to potential investigators that ACEi patients may be safely included in the ReMEDy2 trial.

Following in-depth discussions of the ReMEDy2 Phase 2/3 protocol design with global stroke experts, the scientific advisory board and current investigators, we made several important amendments to the protocol subsequent to the June 2023 lifting of the clinical hold. These changes were submitted to the FDA in early October 2023 and we are proceeding with use of the amended protocol as the FDA did not issue any comments during the 30-day review period which ended on November 3, 2023.

We believe DM199 has the potential to treat a variety of diseases where restoring healthy function requires sufficient activity of KLK1 and its system, KKS. Today, forms of KLK1 derived from human urine and the pancreas of pigs are approved and sold in Japan, China and South Korea to treat AIS, hypertension and other related vascular diseases. We believe millions of patients have been treated with these KLK1 therapies, including over 600,000 AIS patients now being treated annually with human urinary-derived KLK1 in China. Over 200 clinical studies in China have found urinary-derived KLK1 effective for increasing blood flow, decreasing ischemia in the penumbra and reducing infarct size. Importantly, human urinary-derived KLK1 has not been shown to increase the risk of severe intracranial hemorrhage. However, there are numerous regulatory, commercial and clinical drawbacks associated with KLK1 derived from these sources which can be overcome by developing a recombinant version of KLK1 such as DM199. We believe higher regulatory standards and potential antibody reactions are the primary reasons why KLK1 derived from these sources are not currently available and used in the United States or Europe. We are not aware of any recombinant version of KLK1 with regulatory approval for human use in any country, nor are we aware of any recombinant version in development other than our drug candidate, DM199.

DM199 Background

Kallikrein-Kinin System

KLK1 is a serine protease, or protein, produced primarily in the kidneys, pancreas and salivary glands. KLK1 plays a critical role in the regulation of local blood flow and vasodilation (the widening of blood vessels, which decreases vascular resistance) in the body, as well as an important role in reducing inflammation and oxidative stress (an imbalance between potentially damaging reactive oxygen species, or free radicals, and antioxidants in the body).

KLK1 is involved in multiple biochemical processes. The most well-characterized activity of KLK1 is the enzymatic cleavage of low molecular weight kininogen (LMWK) to produce Lys-bradykinin (BK)-like peptides, collectively known as kinins, which activate BK receptors (primarily BK2R since the BK1R is typically only activated in pathological situations). As illustrated below, activation of BK receptors by kinins sets in motion metabolic pathways which locally produce nitric oxide, prostaglandins (primarily prostacyclin in endothelial cells),which work through the cyclic guanosine monophosphate (cGMP) and cyclic nucleotides cyclic adenosine monophosphate (cAMP) pathways, to preferentially relax smooth muscle cells and improve blood flow (through vasodilation), potentially protecting tissues and end-organs from ischemic damage. Scientific literature, including publications inCirculation Research,Immunopharmacology andKidney International, suggests that lower endogenous KLK1 levels in patients are associated with diseases related to vascular disorders, such as stroke, renal diseases and hypertension. DM199, as a protein augmentation therapy, may increase KLK1 levels to properly activate the KKS driving the local production of nitric oxide, prostaglandins and other anti-inflammatory mediators, to promote endothelial health and protect the brain and kidney from damage. By providing additional supply of the KLK1 protein, DM199 treatment could potentially improve blood flow to and reduce inflammation in damaged end-organs, such as the brain and the kidneys, supporting their structural integrity and normal functioning.

We have conducted numerous internal and third-party analyses to demonstrate that DM199 is structurally and functionally equivalent to KLK1 derived from human urine. Specifically, the amino acid structure of DM199 is nearly identical to the human urine form, and the enzymatic and pharmacokinetic profiles are substantially similar to both human urine and porcine derived KLK1. The physiological effects of DM199 on blood pressure, from our completed studies, is similar to that of human urine and porcine-derived forms of KLK1. We believe that the results of this work suggest that the therapeutic action of DM199 will be the same or potentially better than that of the human urinary and porcine forms of KLK1 marketed in Asia.

We believe DM199 may provide a new treatment with significant benefits over the current standards of care by offering a therapeutic treatment option to a greater number of patients with the potential for fewer side effects.

Summary of Clinical Results

To date, clinical trials have been and/or are being conducted in the United States, Europe and Australia. We believe the clinical data generated to date by DM199 supports the continued development of DM199 as a treatment for AIS and CRD**.**

In all completed studies, DM199 was shown to be generally safe and well tolerated. The primary adverse events noted in our studies with healthy volunteers included headache, erythema (redness), dizziness, injection site reaction and flushing. The most common adverse events in people with diabetes with or without chronic kidney disease included orthostatic hypotension, local injection site irritation/redness, and diarrhea. The most common adverse events in people with acute ischemic stroke include constipation, oral candidiasis (yeast/fungal infection of mouth) and nausea.

Supporting Data for Use of DM199 (KLK1)

KLK1 derived from human urine was approved in China in 2005. KLK1 derived from the pancreas of pigs has been approved in Japan for several decades. There is one company selling human urine derived KLK1 in China, and we believe human urine derived KLK1 is currently being used to treat over 600,000 AIS patients per year. We believe that approximately 20 companies are marketing porcine KLK1 in Japan, China and South Korea for hypertension, certain chronic kidney and other vascular diseases. We have identified several hundred papers supporting the clinical use of urinary and porcine derived KLK1 from China, Japan and South Korea.

Studies have shown that lower KLK1 levels are also a predictor of stroke recurrence. The red line in the graph below represents patients in the lowest KLK1 quartile who were at the highest risk for recurrence of stroke. (2,478 stroke patients and event free survival over 5 years).

Low KLK1 Levels Are Associated With Stroke Recurrence

Source: Annals of Neurology (2011) 70:265-73

Our Strategy

Our mission is to improve the lives of people suffering from serious diseases. Our near-term goal is to principally focus on executing our ReMEDy2 Phase 2/3 trial of DM199 in AIS and to finalize plans for the next steps for our CRD program. Key elements of our strategy include:

AIS Background and Disease Pathology

Acute Ischemic Stroke Background

Stroke is characterized by the rapidly developing loss of brain function due to a blockage of blood flow in the brain. As a result, the affected tissues of the brain become inactive and may eventually die. Strokes can be classified into two major categories: AIS and hemorrhagic stroke. AIS is characterized by interruption of the blood supply by a blood clot (ischemia), while a hemorrhagic stroke results from rupture, or bleeding, of a blood vessel in the brain. Risk factors for stroke include, among other things, advanced age, hypertension (high blood pressure), previous stroke or transient ischemic attack (TIA), diabetes, high cholesterol, cigarette smoking, atrial fibrillation, physical inactivity and obesity.

More specifically, with respect to an ischemic stroke, at the site of a blood flow blockage in the brain, there exist two major ischemic zones – the core ischemic zone with nearly complete loss of blood flow (blood flow reduction of 75% to 90%, or more), and the surrounding ischemic penumbra, a rim of mild to moderately ischemic tissue surrounding the core ischemic zone. Within minutes, the significant lack of blood flow in the core ischemic zone deprives these cells of glucose and oxygen which rapidly depletes energy stores and triggers the loss of ion gradients, ultimately leading to neuronal cell death, or apoptosis. The ischemic penumbra zone, however, may remain viable for several hours via collateral arteries that branch from the main occluded artery in the core ischemic zone. Unfortunately, the penumbra is at great risk of delayed tissue damage due to inflammation which may also lead to neuronal cell death. As time goes on, a lack of blood flow in the core ischemic zone (infarct) may lead to fluid buildup (edema) and swelling which creates intracranial pressure. This pressure on the brain leads to tissue compression resulting in additional ischemia. Additional events in AIS include vascular damage to the blood vessel lining or endothelium, loss of structural integrity of brain tissue and blood vessels and inflammation. A stroke can lead to permanent damage with memory loss, speech problems, reading and comprehension difficulties, physical disabilities and emotional/behavioral problems. The long-term costs of stroke are substantial, with many patients requiring extended hospitalization, extended physical therapy or rehabilitation and/or long-term institutional or family care. However, provided the extended window of viability in the penumbra, next generation stroke therapies are being developed to protect valuable brain tissue during the hours to a week after a stroke.

Unmet Medical Need in AIS

According to the World Health Organization, each year 12.2 million people worldwide suffer a stroke, of which 7.6 million are acute ischemic strokes. According to the U.S. Centers for Disease Control and Prevention (CDC) approximately 800,000 people in the U.S. suffer a stroke each year, of which 87% are acute ischemic strokes. We believe that stroke represents an area of significant unmet medical need and a KLK1 therapy (such as DM199) could provide a significant patient benefit, in particular given its proposed treatment window of up to 24 hours after the first sign of symptoms. Currently, the only FDA-approved pharmacological intervention for AIS is tPA, which is approved to be given within 3 hours of symptom onset; however, we understand that based upon supplemental clinical research and common practice, it is typically administered up to 4.5 hours from symptom onset. Treating patients with tPA during this time window can be challenging because it is difficult to determine precisely when symptoms began and a patient must undergo brain imaging before treatment to rule out a hemorrhagic stroke, a ruptured blood vessel causing bleeding within the brain. Mechanical thrombectomy, a procedure which attempts to remove the clot using catheter-based tools, is also available to certain patients. Despite the availability of these treatments, we believe they are relevant to approximately 20% of ischemic stroke patients due to the location of the clot, the elapsed time after the stroke occurred or other safety considerations. Thus, we believe DM199 may offer significant advantages over the current treatment options in that it fills a serious, unmet need for patients who cannot receive tPA or mechanical thrombectomy. Additionally, we believe DM199 may also offer a complementary follow-on treatment for patients who initially receive tPA or mechanical thrombectomy by enabling sustained blood flow improvements to the brain during the critical weeks and months after a stroke, reducing the risk of stroke recurrence.

Acute Ischemic Stroke Treatment Options

According to the CDC, stroke incidence in the United States and its related effects include:

DM199–* Our Novel Solution for the Treatment of AIS*

In response to an ischemic stroke, bradykinin 2 receptors (BK2) are significantly upregulated (increased) in the arteries affected by the stroke, the ischemic penumbra. This phenomenon has been observed in animal stroke models, showing a 36-fold increase on the ipsilateral side and a 10-fold increase on the contralateral side (PLOS ONE (2018), 13(6), e0198553.https://doi.org/10.1371/journal.pone.0198553). In these oxygen depleted arteries, the increased BK2 receptors signal the need for BK to bind and restore blood flow to these at-risk arteries in the ischemic penumbra. The treatment with DM199 is intended to increase the body’s production of BK to bind with the BK2 receptors to improve collateral circulation. In binding with the BK2 receptors expressed on endothelial cells (exposed to internal lumen of the artery), DM199, via production of bradykinin, activates the body’s natural physiologic processes and does not need to pass through the blood brain barrier, which is a specialized structure that is difficult for many therapeutic agents to cross.

As depicted in the graphic below, we believe the mechanism of action for DM199 (KLK1) has the potential to preserve “at risk” penumbral brain tissue by acutely increasing cerebral blood flow by selectively vasodilating arteries in the ischemic penumbra and increasing collateral blood flow, to improve blood flow and restore oxygen levels rescuing these cerebral tissues.

DM199 Acute Ischemic Stroke: Proposed Mechanism

In January 2019, we published a paper titled “Human Tissue Kallikrein in the Treatment of Acute Ischemic Stroke” in a peer reviewed journal (Therapeutic Advances in Neurological Disorders (2019), 12:1-15, .https://doi.org/10.1177/1756286418821918). The paper reviews the scientific literature covering the biochemical role of KLK1 and presents the mechanistic rationale for using KLK1 as an additional pharmacological treatment for AIS. In addition to the biochemical mechanism of KLK1, the review highlights supporting results from human genetics and preclinical animal models of brain ischemia. It also reviews published clinical results for treatment of AIS by a form of KLK1 that is isolated from human urine. This form has been approved for post-stroke treatment of AIS in China and data has been published from clinical trials involving over 4,000 patients. The paper offers a series of testable therapeutic hypotheses for demonstrating the long-term beneficial effect of KLK1 treatment in AIS patients and the reasons for this action.

We are developing DM199 to treat AIS patients with a therapeutic window of up to 24 hours after the first sign of symptoms, well beyond the current window of up to 4.5 hours for tPA, thereby filling a large unmet need for those patients who cannot receive tPA under the currently available treatment window of tPA. This important attribute could potentially make therapy available to the millions of patients worldwide who currently have limited treatment options.

Supporting Data from the Use of Urine-derived KLK1 for the Treatment of AIS in China

In China, Kailikang® is approved and marketed by Techpool Bio-Pharma Inc., a company controlled by Shanghai Pharmaceuticals Holding Co. Ltd. Kailikang has been approved for the treatment of AIS in China. We believe the initial treatment window is up to 48 hours after stroke symptom onset. Based on data from IQVIA real world and health data, other publications and our own internal analysis, we estimate that over 600,000 stroke patients in China were treated in 2022 with Kailikang. More than 50 published clinical studies, covering over 4,000 stroke patients, have demonstrated a beneficial effect of Kailikang treatment in AIS including improvements in standard stroke scores, increased blood flow, reduced infarct size/ischemia in the brain. In a double-blinded, placebo-controlled trial of 446 participants treated with either Kailikang or a placebo with initial treatment administered up to 48 hours after symptom onset showed significantly better scores on the European Stroke Scale and Activities of Daily Living at three weeks post-treatment and after three months using the Barthel Index, (China Journal of Neurology (2007), 40:306–310).

Additionally, a comprehensive meta-analysis covering 24 clinical studies involving 2,433 concluded that human urinary KLK1 appears to ameliorate neurological deficits for patients with AIS and improves long-term outcomes, though a few treated patients suffered from transient hypotension (Journal of Evidence-Based Medicine (2012) 5:31-39, https://doi.org/10.1111/j.1756-5391.2012.01167.x*)*

Furthermore, in a retrospective study covering 300 consecutive AIS patients, subjects treated with human urinary KLK1 experienced a 6.5% absolute reduction (p=0.009) in recurrent strokes (39% relative) within one year (Brain and Behavior (2018), https://onlinelibrary.wiley.com/doi/pdf/10.1002/brb3.1033).

CRD Background and Disease Pathology

Cardio Renal Disease Background

Cardio-renal syndrome refers to the complex interplay between cardiac and renal dysfunction, where acute or chronic dysfunction in one organ may induce acute or chronic dysfunction of the other. A key component of this syndrome is hypertension, which serves as both a cause and consequence of cardio-renal interactions. Hypertension contributes to the development and progression of heart and kidney diseases by imposing increased workload on the heart and by causing damage to the kidneys' nephrons, leading to a vicious cycle of worsening heart and kidney function. This relationship underscores the critical need for integrated management strategies that address both cardiac and renal health to effectively treat and prevent the progression of cardio-renal diseases. This integrated approach includes controlling blood pressure, managing fluid and electrolyte balance, and employing therapies that target the underlying mechanisms linking heart and kidney disease, such as the renin-angiotensin-aldosterone system (RAAS) inhibitors.

DM199–*** Our Novel Solution for the Treatment of CRD, Including Hypertension***

We believe DM199 has the potential to offer meaningful therapeutic benefits for CRD patients. We believe that the KLK1 protein plays a vital role in maintaining normal kidney function, promoting the production of nitric oxide, prostaglandin and other anti-inflammatory mediators which are important for kidney health and integrity. Patients with moderate to severe CRD often excrete abnormally low levels of KLK1 in their urine, leading to the hypothesis that a KLK1 deficit contributes to disease progression.

Additionally, KLK1 is the main source of bradykinin (BK) in resting conditions. BK opposes the prohypertensive renin, angiotensin, aldosterone system (RAAS) by restoring regulation of the epithelial sodium channel (EnaC) and increasing sodium and fluid excretion. DM199 augments low KLK1 levels and promotes natriuresis (excretion of sodium in urine). This regulation of EnaC with DM199 may contribute to lowering blood pressure in hypertensive patients and in particular in patient’s considered to be salt-sensitive.

By providing additional KLK1, we believe DM199 has the potential to:

DM199 treatment is intended to directly replenish KLK1 levels to maintain, or possibly restore, kidney function. Current treatment options, especially ACEi drugs, primarily slow the rate of decline in kidney function but are associated with side effects. Importantly, it is becoming increasingly clear that part of the beneficial effect of ACEi drugs involves preventing the normal breakdown of BK leading to substantial increases in BK levels throughout the body. However, these effects can be unregulated and ACEi drugs therefore can generate excessive BK where it is not needed, potentially leading to side effects such as persistent cough, angioedema (swelling of skin and tissue) and hyperkalemia (abnormally high potassium levels that can lead to cardiac arrest and sudden death). Most importantly, even with the use of ACEi or ARB medications in CRD patients, there remains a high unmet need as a majority of CRD patients still experience a progressive loss of renal function over time. We believe DM199 treatment, either alone or in combination with an ARB, could potentially restore normal KLK1 levels allowing the KKS to perform its normal physiological processes and release BK when and where it is needed, avoiding these side effects.

We intend to clinically evaluate the use of DM199 as a novel therapy for CRD. Protein replacement therapy with DM199, through the activation of the KKS, may complement and balance RAAS, primarily targeted by ACEis and ARBs, and may potentially improve the function of the diseased renal system by improving blood flow and vasodilation, as well as reducing blood pressure.

Our Competition and Current Treatments for Acute Ischemic Stroke and Cardio Renal Disease

The biopharmaceutical industry is highly competitive and characterized by rapidly advancing technologies that focus on rapid development of proprietary drugs. We believe that our DM199 product candidate, development capabilities, experience and scientific knowledge provide us with certain competitive advantages. However, we face significant potential competition from many different sources, including major pharmaceutical, specialty pharmaceutical and biotechnology companies, academic institutions, governmental agencies and other research institutions. Any product candidates that we successfully develop and commercialize will compete with existing therapies and new therapies that may become available in the future.

Many of our competitors, either alone or with their strategic partners, have substantially greater financial, technical and human resources than we do, and experience in obtaining FDA and other regulatory approvals of treatments and commercializing those treatments. Accordingly, our competitors may be more successful than us in obtaining approval for competitive products and achieving widespread market acceptance. Our competitors’ treatments may be more effectively marketed and sold than any products we may commercialize, thus limiting our market share and resulting in a longer period before we can recover the expenses of developing and commercializing our DM199 product candidate.

Mergers and acquisitions in the biotechnology and pharmaceutical industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller or early stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These activities may lead to consolidated efforts that allow for more rapid development of competitive product candidates.

We also compete for staff, development and clinical resources. These competitors may impair our ability to recruit or retain qualified scientific and management personnel, our ability to work with specific advisors, or our ability to work with clinical contract organizations due to conflicts of interest or capacity constraints, and may also delay recruitment of clinical study sites and study volunteers, impeding progress in our development programs.

We expect any products that we develop and commercialize to compete on the basis of, among other things, efficacy, safety, price and the availability of reimbursement from government or other third-party payers. Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are viewed as safer, more effective or less expensive than any products that we may develop.

Acute Ischemic Stroke

Currently, there is one approved pharmaceutical treatment for AIS. That treatment is tPA (marketed under the brand name Activase®), and its therapeutic window is limited to up to 4.5 hours after the AIS. There are, however, a number of companies that are actively pursuing a variety of approaches to develop pharmaceutical products for the treatment of AIS including, among others:

There is a large unmet therapeutic need for AIS treatments that can be administered beyond the 4.5-hour time window of tPA. With this large unmet therapeutic need, there is significant competition to develop new therapeutic options. Currently, the most advanced treatment for AIS uses a medical device for the mechanical removal of blood clots in the large arteries supplying blood to the brain through sophisticated catheter-based approaches, referred to as mechanical thrombectomy. According to published research, use of mechanical thrombectomy is growing and the window of time after a stroke where the procedure can be used is widening. New therapeutic options in development include tissue protection focused therapies (deliverable from hours to days after the stroke) that are intended to preserve and protect brain cells beyond the tPA therapeutic window. The goal is to provide treatment options for the vast majority of AIS patients who do not receive hospital care early enough to qualify for tPA therapy. We believe there is a very significant market opportunity for a drug that has a therapeutic window beyond that of tPA and is able to obtain regulatory approval.

DM199 Clinical Trials

AIS Phase 2/3 ReMEDy2 Trial

We are currently conducting our ReMEDy2 clinical trial of DM199 for the treatment of AIS. Our ReMEDy2 clinical trial is a Phase 2/3, adaptive design, randomized, double-blind, placebo-controlled trial intended to enroll approximately 350 patients at up to 100 sites globally. Patients enrolled in the trial will be treated with either DM199 or placebo within 24 hours of the onset of AIS symptoms. The trial excludes patients treated with tPA, a thrombolytic agent intended to dissolve blood clots, and those with large vessel occlusions. The study population is representative of the approximately 80% of AIS patients who do not have treatment options today, primarily due to the limitations on treatment with tPA and/or mechanical thrombectomy. We believe that the proposed trial has the potential to serve as a pivotal registration study of DM199 in this patient population.

The primary endpoint of the ReMEDy2 trial is physical recovery from stroke as measured by the well-established modified Rankin Scale (mRS) at day 90. The mRS is a commonly used scale for measuring the degree of disability or dependence in the daily activities of people who have suffered a stroke. Secondary endpoints for the trial will evaluate, among other things, mRS shift (which shows the treatment effect on participants across the full spectrum of stroke severity), participant deaths, the National Institute of Health Stroke Score (NIHSS) and Barthel Index (BI) stroke scales and stroke recurrence. Recurrent strokes represent 25% of all ischemic strokes, often occurring in the first few weeks after an initial stroke and are typically more disabling, costly and fatal than initial strokes.

We voluntarily paused participant enrollment in the ReMEDy2 trial to investigate three unexpected instances of clinically significant hypotension (low blood pressure) occurring shortly after initiation of the intravenous (IV) dose of DM199. The acutely low blood pressure levels in the three participants recovered back to their baseline blood pressure within minutes after the IV infusion was stopped, and the participants suffered no injuries. On July 6, 2022, we announced that the FDA placed a clinical hold on the investigational new drug application (IND) for our ReMEDy2 trial. In September 2022, we submitted to the FDA supporting in-vitro data that the cause of the hypotensive events was likely related to switching to a new type of IV bag for use in the ReMEDy2 trial rather than continue with the type of IV bag used in the prior ReMEDy1 trial, where DM199 was generally safe and well tolerated and no hypotensive episodes were reported. While there were no differences in the compatibility of DM199 with either type of IV bag, we observed significant differences in DM199 binding between the two types of IV bags we believe altered, and unintentionally elevated, the total amount of DM199 being administered to participants in the ReMEDy2 trial and thereby triggering the hypotensive events. We also included in this FDA submission, proposed protocol modifications to further address the mitigation of these events, including a reduction in the DM199 dose level for the initial IV dose to effectively match in the PVC IV bags, the well tolerated IV dose administered in the ReMEDy1 trial. Following review of this analysis, the FDA informed us that they were continuing the clinical hold and requesting, among other items, an additional in-use, in vitro stability study of all of the materials and equipment used in the IV administration of DM199, which included testing the combination of the IV bag, IV tubing and mechanical infusion pump, to further rule out any other cause of the hypotension events. The requested in-use study was completed at an independent laboratory and the results were substantially consistent with our initial stand-alone testing of the IV bags. In May 2023, this additional supporting data was submitted to the FDA in our clinical hold response. In June 2023, the FDA completed review of our clinical hold response and informed us that the clinical hold was fully removed allowing us to begin preparations to resume our ReMEDy2 trial.

Following in-depth discussions of the ReMEDy2 Phase 2/3 protocol design with global stroke experts, the scientific advisory board and current investigators, the Company has made several important amendments to the protocol subsequent to the lifting of the clinical hold. These changes were submitted to the FDA in early October and the Company is proceeding with use of the amended protocol as the FDA did not issue any comments during the 30-day review period which ended on November 3, 2023.

Prior to the clinical hold of our ReMEDy2 trial, we had experienced slower than expected site activations and enrollment in our ReMEDy2 trial and may continue to experience these conditions as we activate additional clinical sites and enrollment participants. We believe this was due primarily to clinical staff shortages resulting from layoffs and employee burnout, the reallocation of clinical nurses to COVID-19 care, particularly during surges in COVID-19 cases, a loss of study coordinators resulting from budget constraints and COVID-19 vaccination requirements and concerns managing logistics and protocol compliance for participants discharged from the hospital to an intermediate care facility. In an effort to mitigate the impact of these factors, we have worked with our contract research organization to develop alternative procedures to support study sites and potential participants as needed. We intend to continue to monitor the results of these efforts or implement additional actions to mitigate the impact of these factors on our ReMEDy2 trial, however no assurances can be provided as to if and when these issues will resolve.

In September 2021, the FDA granted Fast Track designation to DM199 for the treatment of AIS where tPA and/or mechanical thrombectomy are not indicated or medically appropriate. The FDA may grant Fast Track designation to a drug that is intended to treat a serious condition and nonclinical or clinical data demonstrate the potential to address unmet medical need. The FDA provides opportunities for frequent interactions with the review team for a Fast Track product, including end-of-phase 2 meetings with the FDA to discuss study design, extent of safety data required to support approval, dose-response concerns, and use of biomarkers. A Fast Track product may also be eligible for rolling review, where the FDA reviews portions of a marketing application before the sponsor submits the complete application.

Phase 1C Open Label Safety Trial

Concurrently with performing the requested in-use study, we also conducted a Phase 1C open label, single ascending dose (SAD) study of DM199 administered with the PVC IV bags used in the ReMEDy2 trial. The purpose of the study was to confirm, with human data, the DM199 blood concentration levels achieved with the IV dose and further evaluate safety and tolerability. This study was conducted in Australia. The third cohort, which received the 0.50 µg/kg dose level proposed for the ReMEDy2 trial, was dosed in April 2023 with no significant adverse events related to DM199. The pharmacokinetic data, including the DM199 blood concentration levels, for all cohorts was included as supplemental information in our clinical hold response. In investigating the cause of the unexpected instances of hypotension, we noted that all three participants were receiving angiotensin-converting enzyme inhibitor (ACEi) therapy at the time of their enrollment. Given this, we also completed an additional, fourth cohort of hypertensive patients (Part B) being treated with ACEi prior to enrolling. All ACEi patients received the full IV dose at the 0.5 µg/kg level with no instances of hypotension. We believe that these results provide further assurance to potential investigators that ACEi patients may be safely included in the ReMEDy2 trial.

AIS Phase 2 ReMEDy1 Trial

In May 2020, we announced top-line data from our Phase 2 ReMEDy1 trial assessing the safety, tolerability and markers of therapeutic efficacy of DM199 in patients suffering from AIS. We initiated treatment in this trial in February 2018 and completed enrollment in October 2019 with 92 participants. The study drug (DM199 or placebo) was administered as an intravenous (IV) infusion within 24 hours of stroke symptom onset, followed by subcutaneous injections later that day and once every 3 days for 21 days. The trial was designed to measure safety and tolerability along with multiple tests designed to investigate DM199’s therapeutic potential including plasma-based biomarkers and standard functional stroke measures assessed at 90 days post-stroke. Standard functional stroke measurements include the Modified Rankin Scale, National Institutes of Health Stroke Scale, the Barthel Index. The trial met primary safety and tolerability endpoints and was generally safe and well tolerated. In addition, there was a demonstrated therapeutic effect on the rate of severe stroke recurrence inclusive of all participants and there was also a demonstrated therapeutic effect on the physical recoveries of participants that received tPA prior to enrollment but not in participants receiving mechanical thrombectomy prior to enrollment.

Prior to enrollment, 44 of the 91 evaluable participants (48%) received mechanical thrombectomy intervention, a catheter-based treatment intended to physically remove clots and potentially available for patients who have a large vessel occlusion and can be treated within 6 to 24 hours of the onset of stroke symptoms. While approximately 20% of AIS patients are believed to be eligible for a mechanical thrombectomy, currently only about 5% to 10% receive the treatment due to elapsed time post-stroke or unavailability of the therapy at the hospital where the patient presents. DM199 is intended to treat the approximately 80% of AIS patients who are not eligible for either mechanical thrombectomy or tPA. Treatment for these patients is limited to supportive care. Due to the large volume of participants receiving mechanical thrombectomy prior to enrollment in the ReMEDy1 trial, and a disproportionate distribution of these participants between the active treatment and placebo groups, DM199 did not produce a therapeutic effect on physical recoveries in the overall trial analysis.

When participants treated with mechanical thrombectomy are excluded from the trial data set, which represents the group of participants most closely aligned with the target treatment population for DM199 in the ReMEDy2 trial, a positive therapeutic effect on participant physical recoveries was demonstrated. As shown in the table below, when evaluating the participants treated with DM199 (n=25) vs. supportive care and/or tPA (n=21), the results showed that 36% of participants receiving DM199 progressed to a full or nearly full recovery at 90 days (NIHSS: 0-1), compared to 14% of participants in the placebo group. This represents a 22% absolute increase in the proportion of participants achieving a full or nearly full recovery. Additionally, subject deaths decreased from 24% in the placebo group to 12% in the active therapy group, a 50% relative reduction. Note that the number of subjects in these subsets were insufficient for statistical significance.

DM199 vs. Supportive Care and/or tPA

In addition, in the evaluable participants (n=91), a significant reduction in the number of participants with recurrent ischemic stroke was noted in the active treatment group: 0 (0%) participants treated with DM199 vs. 6 (13%) on placebo (p=0.012), with 4 of the 6 resulting in participant death.

We believe these findings from our Phase 2 ReMEDy1 trial, which are consistent with the use of Kailikang in China, provide a signal that recombinant human KLK1 appears safe and may have promise as a new treatment for physicians who have limited options for the treatment of patients following an AIS.

CRD Phase 2 REDUX Trial

Our REDUX trial was a multi-center, open-label investigation of participants with mild or moderate chronic kidney disease (CKD) (Stage II or III) and albuminuria. The trial was conducted in the United States and included: Cohort 1 enrolled non-diabetic, hypertensive African Americans (AA) with Stage II or III CKD. African Americans are at greater risk for CKD than Caucasians, and those African Americans who have the APOL1 gene mutation are at an even higher risk. Cohort 2 enrolled participants with IgA Nephropathy (IgAN). Cohort 3 enrolled participants with Type 2 diabetes mellitus with CKD, hypertension and albuminuria (DKD). The trial evaluated two dose levels of DM199 within each cohort. Study participants received DM199 by subcutaneous injection twice weekly for 95 days. The primary study endpoints, evaluated after three months of treatment, included safety, tolerability, blood pressure, albuminuria and kidney function, which are evaluated by changes from baseline in estimated glomerular filtration rate, albuminuria, as measured by the urinary albumin to creatinine ratio, and blood pressure in hypertensive participants.

Interim results, issued in November 2021, indicated that after three months of treatment, DM199 was demonstrating clinically meaningful improvements in kidney function in Cohorts 1 and 2, as measured by simultaneously stabilizing estimated glomerular filtration rate (eGFR) and decreasing the urinary albumin-to-creatinine ratio (UACR). Additionally, in participants who were hypertensive (Cohorts 1 and 3), DM199 reduced blood pressure by clinically significant levels and importantly, there was no effect on participants who were not hypertensive (Cohort 2).

DM199 was generally safe and well tolerated across all cohorts. Adverse events (AEs) were generally mild to moderate in severity, with the most common being local injection site irritation, and all resolved without medical intervention.

We completed enrollment in REDUX with a total 84 subjects enrolled, including 24 African American subjects into Cohort 1, 25 subjects with IgAN into Cohort 2 and 35 subjects with Type 2 diabetes in Cohort 3. As of March 31, 2022, all participants had completed their treatment periods.

We plan to disclose additional data related to blood pressure control as part of supporting our plans for our cardio renal program to be disclosed in 2024.

DM199 Safety Summary

Intravenously/subcutaneously administered DM199, in doses ranging from 0.025 μg/kg to 50.0 μg/kg, has been administered to over 250 subjects across 5 completed clinical studies and has been shown to be generally safe and well tolerated. The most frequently reported treatment-emergent adverse events in our Phase 2 ReMEDy1 AIS trial were constipation, oral candidiasis and nausea. These events were predominately mild to moderate in severity. Orthostatic hypotension was determined to be the dose limiting tolerability. There have been 3 reported drug-related serious adverse events (SAEs) in subjects receiving DM199 of transient hypotension; these events were rapidly reversible upon stopping infusion with no long term sequelae (further adverse events).

Potential DM199 Commercial Advantages

Several researchers have studied the structural and functional properties of KLK1. This deep body of knowledge has revealed the potential clinical benefits of KLK1 treatments. Today, forms of KLK1 derived from human urine and the pancreas of pigs are approved and sold in Japan, China and South Korea to treat AIS, CRD, retinopathy, hypertension and related diseases. We are not aware of any recombinant version of KLK1 with regulatory approval for human use in any country, nor any recombinant version in development other than our drug candidate DM199. We believe at least five companies have attempted, unsuccessfully, to create a recombinant version of KLK1.

The growing understanding of the role of KLK1 in human health and its use in Asia as an approved therapeutic highlight two important potential commercial advantages for DM199:

KLK1 treatment is sold in Japan, China and South Korea. Research has shown that patients with low levels of KLK1 are associated with a variety of diseases related to vascular dysfunction, such as AIS, CRD, retinopathy and hypertension. In randomized, controlled clinical trials, human urine and porcine derived KLK1 has demonstrated statistically significant clinical benefits in treating a variety of patients with KLK1 compared to placebo. These efficacy results are further substantiated by established markets in Japan, China and South Korea for pharmaceutical sales of KLK1 derived from human urine and the pancreas of pigs. We estimate that millions of patients have been treated with these forms of KLK1 in Asia. Altogether, we believe this supports a strong market opportunity for a recombinant version of KLK1 such as DM199.

KLK1 treatment has had limited side effects and has been well tolerated in studies to date. KLK1 is naturally produced by the human body; and, therefore, the body’s own control mechanisms act to limit potential side effects. The side effect observed to limit participant tolerability in our clinical trials was orthostatic hypotension, or a sudden drop in blood pressure, which has been primarily seen at doses 10 to 20 times higher than our anticipated therapeutic dose levels. Most recently, clinically significant, transient hypotension (low blood pressure) occurring shortly after initiation of the intravenous (IV) dose of DM199 was experienced by three participants in our ReMEDy2 trial which were the cause of the Company pausing participant enrollment and the FDA placing a clinical hold on the IND for our ReMEDy2 trial. The blood pressure levels of the three participants recovered back to their baseline blood pressure within minutes after the IV infusion was stopped and the participants suffered no injuries. We believe that these events were caused by our switching away from the type of IV bag used in the prior ReMEDy1 trial, where no hypotensive episodes were reported, which resulted in an unintended, elevated dose of DM199 being delivered in the ReMEDy2 trial. We believe that by reducing the dose rate for the IV infusion to a level that matches the effective dose rate in the ReMEDy1 trial, we can manage and/or eliminate the clinically significant hypotensive events.

Moreover, we understand that routine clinical use of KLK1 treatment in Asia has been well-tolerated by patients for several decades. In 2017, we completed a clinical trial comparing the pharmacokinetic profile of DM199 to the human urinary form of KLK1 (Kailikang), which showed DM199, when administered in intravenous form, had a similar pharmacokinetic profile. Further, when DM199 was administered subcutaneously, DM199 demonstrated a longer acting pharmacokinetic profile, superior to the intravenously administered Kailikang and DM199.

In addition, we believe that there are also significant formulation, manufacturing, regulatory and other advantages for recombinant human KLK1 drug candidate DM199:

Potency and Impurity Considerations. KLK1 produced from human urine or the pancreas of pigs presents risks related to preventing impurities, endotoxins and chemical byproducts due to the inherent variability of the isolation and purification process. We believe that this creates the risk of inconsistencies in potency and impurities from one production run to the next. However, we expect to produce a consistent formulation of KLK1 that is free of endotoxins and other impurities.

Cost and Scalability. Large quantities of human urine or pig pancreas must be obtained to derive a small amount of KLK1. This creates potential procurement, cost and logistical challenges to source the necessary raw material, particularly for human urine sourced KLK1. Once sourced, the raw material is processed using chemicals and costly capital equipment and produces a significant amount of byproduct waste. Our novel recombinant manufacturing process utilizes widely available raw materials and can be readily scaled for commercial production. Accordingly, we believe our manufacturing process will have significant cost and scalability advantages.

Regulatory. We are not aware of any attempts by manufacturers of the urine or porcine based KLK1 products to pursue regulatory approvals in the United States. We believe that this is related to challenges presented by using inconsistent and potentially hazardous biomaterials, such as human urine and the pancreas of pigs, and their resulting ability to produce a consistent drug product. Our novel recombinant manufacturing process utilizes widely available raw materials which we believe provides a significant regulatory advantage, particularly in regions such as the United States, Europe and Canada, where safety standards are high. In addition, we believe that DM199 could qualify for 12 years of data exclusivity in the United States under the Biologics Price Competition and Innovation Act of 2009 (BPCIA), which was enacted as part of the Patient Protection and Affordable Care Act (ACA) as amended by the Health Care and Education Reconciliation Act of 2010.

From a strategic perspective, we continue to believe that strategic alternatives with respect to our DM199 product candidate, including licenses and business collaborations, with other regional and global pharmaceutical and biotechnology companies can be important in advancing the clinical development of DM199. Therefore, as a matter of course and from time to time, we engage in discussions with third parties regarding these matters.

Regulatory Approval

Securing regulatory approval for the manufacture and sale of human therapeutic products in the United States, Europe, Canada and other commercial territories is a long and costly process that is controlled by each territory’s national regulatory agency. The national regulatory agency in the United States is the FDA, in Europe it is the European Medicines Agency (EMA), and in Canada it is Health Canada. Other national regulatory agencies have similar regulatory approval requirements, but each national regulatory agency has its own approval processes. Approval in the United States, Europe or Canada does not assure approval by other national regulatory agencies, although often test results from one country may be used in applications for regulatory approval in another country.

Prior to obtaining regulatory approval to market a drug product, every national regulatory agency has a variety of statutes and regulations which govern the principal development activities. These laws require controlled research and testing of products, governmental review, and approval of a submission containing preclinical and clinical data establishing the safety and efficacy of the product for each use sought, as well as approval of manufacturing facilities, including adherence to good manufacturing practices (GMP) during production and storage, and control of marketing activities, including labeling and advertising.

None of our product candidates have been completely developed or tested; and, therefore, we are not yet in a position to seek regulatory approval in any territory to market any of our product candidates.

The clinical testing, manufacturing, labeling, storage, distribution, record keeping, advertising, promotion, import, export and marketing, among other things, of our current or future product candidates, are subject to extensive regulation by governmental authorities in the United States and other countries. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable requirements at any time during the product development process, approval process, or after approval may subject us to a variety of administrative or judicial sanctions, including refusal by the applicable regulatory authority to approve pending applications, withdrawal of an approval, imposition of a clinical hold, issuance of warning letters and other types of letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement of profits, or civil or criminal investigations and penalties brought by the FDA and the Department of Justice or other governmental entities.

U.S. Approval Process

In the United States, the FDA is responsible for the drug approval process. The FDA’s mission is to ensure that all medications on the market are safe and effective. The FDA’s approval process examines and thoroughly reviews potential new drugs; only those that are in compliance with the Code of Regulations, 21 CFR 312 and 21 CFR 314 are approved.

The U.S. food and drug regulations require licensing of manufacturing facilities, carefully controlled research and testing of products, governmental review and approval of test results prior to marketing of therapeutic products, and adherence to GMP, as defined by each licensing jurisdiction, during production.

A description of the different stages in the drug approval process in the United States follows.

Stage 1: Preclinical Research. After an experimental drug is discovered, research is conducted to help determine its potential for treating or curing an illness. This is called preclinical research. Animal and/or bench studies are conducted to determine if there are any harmful effects of the drug and to help understand how the drug works. Information from these experiments is submitted to the FDA as part of an IND. The FDA reviews the information in the IND and decides if the drug is safe to study in humans.

Stage 2: Clinical Research. The experimental drug is studied in humans. The studies are known as clinical trials. Clinical trials are carefully designed and controlled experiments in which the experimental drug is administered to patients to test its safety and to determine the effectiveness of an experimental drug. The four general phases of clinical research are described below.

Stage 3: FDA Review for Approval. Following the completion of Phase 3 clinical studies, the pharmaceutical company prepares an electronic common technical document reporting all clinical nonclinical and chemistry, manufacturing and control studies conducted on the drug that is transmitted to the FDA as a Biologics License Application (BLA). The FDA reviews the information in the BLA to determine if the drug is safe and effective for its intended use. An advisory panel meeting is scheduled for a new drug allowing the FDA to gain feedback from experts. If the FDA determines that the drug is safe and effective, the drug will be approved.

Stage 4: Marketing. After the FDA has approved the experimental drug, the pharmaceutical company can make it available to physicians and their patients. A company also may continue to conduct research to discover new uses for the drug. Each time a new use for a drug is discovered, the drug once again is subject to the entire FDA approval process before it can be marketed for that purpose.

Any FDA approved pharmaceutical products are subject to continuing regulation by the FDA, including, among other things, record-keeping requirements, reporting of adverse experiences with the product, providing the FDA with updated safety and efficacy information, product sampling and distribution requirements, complying with certain electronic records and signature requirements and complying with FDA guidance documents, and promotion and advertising requirements, which include, among others, standards for direct-to-consumer advertising, promoting pharmaceutical products for uses or in patient populations that are not described in the pharmaceutical product’s approved labeling (known as “off-label use”), industry-sponsored scientific and educational activities and promotional activities involving the internet or social media. Failure to comply with FDA requirements is likely to have negative consequences, including adverse publicity, warning or enforcement letters from the FDA or the Federal Trade Commission (FTC), mandated corrective advertising or communications with doctors, product seizures or recalls and state or federal civil or criminal prosecution, injunctions and penalties.

The FDA also may require post-marketing testing, known as Phase 4 testing, risk evaluation and mitigation strategies and surveillance to monitor the effects of an approved product or place conditions on an approval that could restrict the distribution or use of the product.

DM199 may qualify for 12 years of data exclusivity under the BPCIA, which was enacted as part of the ACA, as amended by the Health Care and Education Reconciliation Act of 2010. Under the BPCIA, an application for a biosimilar product (BLA) cannot be submitted to the FDA until four years, or if approved by the FDA, until 12 years, after the original brand product identified as the reference product is approved under a BLA. The BPCIA provides an abbreviated pathway for the approval of biosimilar and interchangeable biological products. The new abbreviated regulatory pathway establishes legal authority for the FDA to review and approve biosimilar biologics, including the possible designation of a biosimilar as “interchangeable” based on its similarity to an existing brand product. The new law is complex and is only beginning to be interpreted and implemented by the FDA.

European Approval Process

The EMA is roughly parallel to the FDA in terms of the drug approval process and the strict requirements for approval. The EMA was set up in 1995 in an attempt to harmonize, but not replace, the work of existing national medicine regulatory bodies in individual European countries. As with the FDA, the EMA drug review and approval process follows similar stages from preclinical testing through clinical testing in Phase 1, 2, and 3. There are some differences between the FDA and EMA review process, specifically the review process in individual European countries. Such differences may allow certain drug products to be tested in patients at an earlier stage of development.

Other Healthcare Laws and Compliance Requirements

In the United States, our activities are potentially subject to regulation by various federal, state and local authorities in addition to the FDA, including the Centers for Medicare and Medicaid Services and other divisions of the U.S. government, including, the Department of Health and Human Services, the Department of Justice and individual U.S. Attorney offices within the Department of Justice, and state and local governments. For example, if a drug product is reimbursed by Medicare, Medicaid, or other federal or state healthcare programs, a company, including its sales, marketing and scientific/educational grant programs, must comply with the federal Food, Drug & Cosmetic Act (FDCA) as it relates to advertising and promotion of drugs, the federal False Claims Act, as amended, the federal Anti-Kickback Statute, as amended, the Physician Payments Sunshine Act, the federal Health Insurance Portability and Accountability Act of 1996 (HIPAA), and similar state laws. If a drug product is reimbursed by Medicare or Medicaid, pricing and rebate programs must comply with, as applicable, the Medicaid rebate requirements of the Omnibus Budget Reconciliation Act of 1990 (OBRA), and the Medicare Prescription Drug Improvement and Modernization Act of 2003. Among other things, OBRA requires drug manufacturers to pay rebates on prescription drugs to state Medicaid programs and empowers states to negotiate rebates on pharmaceutical prices, which may result in prices for our future products being lower than the prices we might otherwise obtain. Additionally, the ACA substantially changes the way healthcare is financed by both governmental and private insurers. There may continue to be additional proposals relating to the reform of the U.S. healthcare system, in the future, some of which could further limit coverage and reimbursement of drug products. If drug products are made available to authorized users of the Federal Supply Schedule of the General Services Administration, additional laws and requirements may apply.

Pharmaceutical Coverage, Pricing and Reimbursement

In the United States and markets in other countries, sales of any products for which we receive regulatory approval for commercial sale will depend in part on the availability of coverage and adequate reimbursement from third-party payers, including government health administrative authorities, managed care providers, private health insurers and other organizations. In the United States, private health insurers and other third-party payers often provide reimbursement for products and services based on the level at which the government (through the Medicare and/or Medicaid programs) provides reimbursement for such treatments. Third-party payers are increasingly examining the medical necessity and cost-effectiveness of medical products and services in addition to their safety and efficacy; and, accordingly, significant uncertainty exists regarding the coverage and reimbursement status of newly approved therapeutics. In particular, in the United States, the European Union and other potentially significant markets for our product candidates, government authorities and third-party payers are increasingly attempting to limit or regulate the price of medical products and services, particularly for new and innovative products and therapies, which has resulted in lower average selling prices. Further, the increased emphasis on managed healthcare in the United States and on country and regional pricing and reimbursement controls in the European Union will put additional pressure on product pricing, reimbursement and usage, which may adversely affect our future product sales and results of operations. These pressures can arise from rules and practices of managed care groups, judicial decisions and governmental laws and regulations related to Medicare, Medicaid and healthcare reform, pharmaceutical reimbursement policies and pricing in general. As a result, coverage and adequate third party reimbursement may not be available for our products to enable us to realize an appropriate return on our investment in research and product development.

The market for our product candidates for which we may receive regulatory approval will depend significantly on access to third-party payers’ drug formularies or lists of medications for which third-party payers provide coverage and reimbursement. The industry competition to be included in such formularies often leads to downward pricing pressures on pharmaceutical companies. Also, third-party payers may refuse to include a particular branded drug in their formularies or may otherwise restrict patient access to a branded drug when a less costly generic equivalent or another alternative is available. In addition, because each third-party payer individually approves coverage and reimbursement levels, obtaining coverage and adequate reimbursement is a time-consuming and costly process. We would be required to provide scientific and clinical support for the use of any product candidate to each third-party payer separately with no assurance that approval would be obtained, and we may need to conduct expensive pharmacoeconomic studies to demonstrate the cost-effectiveness of our product candidates. This process could delay the market acceptance of any of our product candidates for which we may receive approval and could have a negative effect on our future revenues and operating results. We cannot be certain that our product candidates will be considered cost-effective. If we are unable to obtain coverage and adequate payment levels for our product candidates from third-party payers, physicians may limit how much or under what circumstances they will prescribe or administer them and patients may decline to purchase them. This in turn could affect our ability to successfully commercialize our products and impact our profitability, results of operations, financial condition, and future success.

Research and Development

We have devoted substantially all of our efforts to research and development (R&D), which therefore comprises the largest component of our operating costs. Our primary focus over the past approximately 12 years has been our lead product candidate, DM199, which is currently in clinical development for the treatment of AIS.

We expect our R&D expenses will continue to increase in the future as we continue the development and clinical study of our initial product candidate, DM199, in AIS and seek to pursue other indications or expand our product candidate portfolio. The process of conducting the necessary development and clinical research to obtain regulatory approval is costly and time-consuming and we consider the active management and development of our clinical pipeline to be integral to our long-term success. The actual probability of success for each product candidate, clinical indication and preclinical program may be affected by a variety of factors including, among other things, the safety and efficacy data for each product candidate, amounts invested in their respective programs, competition and competitive developments, manufacturing capability and commercial viability.

R&D expenses include:

R&D costs are expensed as incurred. Costs for certain development activities such as clinical trials are recognized based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors and our clinical sites.

We expect that it will be at least three to four years, if ever, before we have any product candidates ready for commercialization.

Manufacturing

We do not own or operate manufacturing facilities for the production of DM199 nor do we have plans to develop our own manufacturing operations in the foreseeable future. We rely on Catalent Pharma Solutions, LLC (Catalent), a contract development and manufacturing organization (CDMO) with proven GMP experience in the manufacturing of recombinant proteins for clinical trials, for procuring all of our required raw materials and producing active pharmaceutical ingredient for our clinical trials. We have licensed certain gene expression technology and we contract with Catalent for the manufacture of DM199 drug substance. We currently employ internal resources and third-party consultants to manage our manufacturing relationship with Catalent.

Sales and Marketing

We have not yet defined our sales, marketing or product distribution strategy for our initial product candidate, DM199, or any future product candidates. We currently expect to partner with a large pharmaceutical company for sales execution. However, our future commercial strategy may include the use of distributors, a contract sales force or the establishment of our own commercial and specialty sales force, as well as similar strategies for regions and territories outside the United States.

Intellectual Property

We view patents and other means of intellectual property protection, including trade secrets, as an important component of our core business. We focus on translating our innovations into intellectual property protecting our proprietary technology from infringement by competitors. To that end, patents are reviewed frequently and continue to be sought in relation to those components or concepts of our preclinical and clinical products to provide protection. Our strategy, where possible, is to file patent applications to protect our product candidates, as well as methods of manufacturing, administering and using a product candidate. Prior art searches of both patent and scientific databases are performed to evaluate novelty, inventiveness and freedom-to-operate. We require all employees, consultants and parties to a collaborative research agreement to execute confidentiality agreements upon the commencement of employment, consulting relationships or a collaboration with us. These agreements require that all confidential information developed or made known during the course of the engagement with us is to be kept confidential. We also maintain agreements with our scientific staff and all parties contracted in a scientific capacity affirming that all inventions resulting from work performed for us, using our property or relating to our business and conceived or completed during the period covered by the agreement are the exclusive property of DiaMedica.

Our DM199 patent portfolio includes four granted U.S. patents, a granted European patent, a granted Canadian patent, and pending applications in Australia, Canada, China, Europe, India, Japan, South Korea, Hong Kong and the United States. Granted or pending claims offer various forms of protection for DM199 including claims to compositions of matter, pharmaceutical compositions, specific formulations and dosing levels and methods for treating a variety of diseases, including stroke, chronic kidney disease and related disorders. These U.S. patents and applications, and their foreign equivalents, are described in more detail below.

Issued patents held by us cover the DM199 composition of matter based on an optimized combination of closely-related isoforms that differ in the extent of glycosylation (process by which sugars are chemically attached to proteins). Issued claims in this patent family cover the most pharmacologically active variants of DM199 and methods of using the same for treating ischemic conditions and these patents are due to expire in 2033. A second patent family includes an issued U.S. patent with claims directed to methods of treating subjects by administering a SC formulation of DM199 or related recombinant kallikrein-1 (KLK1) polypeptides and is predicted to expire in 2033. The pending applications are directed to a range of dose levels and dosing regimens of DM199 that are potentially useful for treating a wide range of diseases including, e.g. pulmonary arterial hypertension, cardiac ischemia, chronic kidney disease, diabetes, stroke and vascular dementia which, if granted, are predicted to expire in 2038.

As previously discussed, we do not own or operate manufacturing facilities for the production of clinical or commercial quantities of DM199. We are contracting with Catalent for the manufacture of DM199. We have licensed certain gene expression technology and we contract with Catalent for the manufacture of DM199. Under the terms of this license, certain milestone and royalty payments may become due and are dependent upon, among other factors, performing clinical trials, obtaining regulatory approvals and ultimately the successful commercialization of a new drug, the outcome and timing of which is uncertain. The royalty term is indefinite but the license agreement may be canceled by us on 90 days’ prior written notice. The license may not be terminated by Catalent unless we fail to make required milestone and royalty payments.

Methods and reagents required for commercial scale manufacture of DM199 are subject to a series of patents issued to Catalent. We license these patents from Catalent, and such license is exclusive as it relates to the production of DM199 or any human KLK1 protein.

We believe that our proprietary technology along with trade secrets and specialized knowledge of the manufacturing process will provide substantial protection from third-party competitors. We also believe that DM199 cannot be easily reverse engineered for the production of a copycat version.

We believe that the most relevant granted patents and applications with composition of matter or method of use claims covering DM199 are listed below, along with their projected expiration dates exclusive of any patent term extension:

The base term of a U.S. patent is 20 years from the filing date of the earliest-filed non-provisional patent application from which the patent claims priority. The term of a U.S. patent can be lengthened by patent term adjustment, which compensates the owner of the patent for administrative delays at the U.S. Patent and Trademark Office. In some cases, the term of a U.S. patent is shortened by terminal disclaimer that reduces its term to that of an earlier-expiring patent.

The term of a U.S. patent may also be eligible for patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Act, to account for at least some of the time the drug is under development and regulatory review after the patent is granted. With regard to a drug for which FDA approval is the first permitted marketing of the active ingredient, the Hatch-Waxman Act allows for extension of the term of one U.S. patent that includes at least one claim covering the composition of matter of an FDA-approved drug, an FDA-approved method of treatment using the drug, and/or a method of manufacturing the FDA-approved drug. The extended patent term cannot exceed the shorter of five years beyond the non-extended expiration of the patent or 14 years from the date of the FDA approval of the drug. Some foreign jurisdictions, including Europe and Japan, also have patent term extension provisions, which allow for extension of the term of a patent that covers a drug approved by the applicable foreign regulatory agency. In the future, if and when our pharmaceutical products receive FDA approval, we expect to apply for patent term extension on patents covering those products, their methods of use, and/or methods of manufacture.

In addition to patents, we rely on trade secrets and know-how to develop and maintain our competitive position. Companies typically rely on trade secrets to protect aspects of their business that are not amenable to, or that they do not consider appropriate for, patent protection. We protect trade secrets, if any, and know-how by establishing confidentiality agreements and invention assignment agreements with our employees, consultants, scientific advisors, contractors and partners. These agreements provide that all confidential information developed or made known during the course of an individual or entity’s relationship with us must be kept confidential during and after the relationship. These agreements also generally provide that all relevant inventions resulting from work performed for us or relating to our business and conceived or completed during the period of employment or assignment, as applicable, shall be our exclusive property. In addition, we take other appropriate precautions, such as physical and technological security measures, to guard against misappropriation of our proprietary information by third parties.

Employees

As of December 31, 2023, we had 19 employees, 18 of whom were full-time and one part-time. We have never had a work stoppage and none of our employees are covered by collective bargaining agreements. We believe our employee relations are good.

Information About Our Executive Officers

The following table sets forth information as of March 15, 2024 regarding each of our current executive officers:

The present principal occupations and recent employment history of each of our executive officers are set forth below.

Rick Pauls was appointed our President and Chief Executive Officer in January 2010. Mr. Pauls has served as a member of our Board of Directors since April 2005 and the Chairman of the Board from April 2008 to July 2014. Prior to joining DiaMedica, Mr. Pauls was the Co-Founder and Managing Director of CentreStone Ventures Inc., a life sciences venture capital fund, from February 2002 until January 2010. Mr. Pauls was an analyst for Centara Corporation, another early stage venture capital fund, from January 2000 until January 2002. From June 1997 until November 1999, Mr. Pauls worked for General Motors Acceptation Corporation specializing in asset-backed securitization and structured finance. Mr. Pauls previously served as an independent member of the board of directors of LED Medical Diagnostics, Inc. Mr. Pauls received his Bachelor of Arts in Economics from the University of Manitoba and his M.B.A. in Finance from the University of North Dakota.

Lorianne Masuoka, M.D. joined DiaMedica as our Chief Medical Officer in January 2024. Prior to joining DiaMedica, Dr. Masuoka served as the Chief Medical Officer of Epygenix Therapeutics, a clinical-stage pharmaceutical company focused on the development of new drugs for the treatment of intractable, rare genetic epilepsies from May 2022 through December 2023. Prior to Epygenix, Dr. Masuoka served as an independent clinical development consultant for several biopharmaceutical companies and as the Chief Medical officer of Marinus Pharmaceuticals From April 2017 through November 2019. Dr. Masuoka served as the Chief Medical Officer or acting Chief Medical Officer at Invivo Therapeutics, from March 2015 through July 2017, Cubist Pharmaceuticals (now Merck) from July 2013 through January 2015 and Nektar Therapeutics from June 2009 through August 2011. Previously, she held various roles of increasing responsibility at FivePrime Therapeutics (now Amgen) and Chiron (now Novartis). In addition to her executive roles, Dr. Masuoka most recently served as a Board member at Pfenex Inc. (now Ligand) and served as a Board member at Opiant Pharmaceuticals (now Indivior). Dr. Masuoka received her medical degree from the University of California, Davis, where she also completed her residency in neurology. She completed her epilepsy fellowship at Yale University and is board certified by the American Boards of Psychiatry and Neurology.

Scott Kellen joined DiaMedica as our Vice President of Finance in January 2018 and was appointed our Chief Financial Officer and Secretary in April 2018. Prior to joining DiaMedica, Mr. Kellen served as Vice President and Chief Financial Officer of Panbela Therapeutics, Inc., formerly known as Sun BioPharma, Inc., a publicly traded clinical stage drug development company, from October 2015 until April 2018. From February 2010 to September 2015, Mr. Kellen served as Chief Financial Officer and Secretary of Kips Bay Medical, Inc., a publicly traded medical device company, and became Chief Operating Officer of Kips Bay in March 2012. From November 2007 to May 2009, Mr. Kellen served as Finance Director of Transoma Medical, Inc. From 2005 to October 2007, Mr. Kellen served as Corporate Controller of ev3 Inc. From March 2003 to April 2005, Mr. Kellen served as Senior Manager, Audit and Advisory Services of Deloitte & Touche, LLP. Altogether, Mr. Kellen has spent more than 25 years in the life sciences industry, focusing on publicly traded early stage and growth companies. Mr. Kellen has a Bachelor of Science degree in Business Administration from the University of South Dakota and is a Certified Public Accountant (inactive).

Dominic Cundari joined DiaMedica as our Chief Commercial Officer in February 2022. Mr. Cundari has over 30 years of pharmaceutical experience in various commercial roles in high growth markets. Prior to joining DiaMedica, Mr. Cundari served as an independent commercial strategy and development consultant for Genentech, a global biotechnology company, since February 2009. From January 1988 to January 2009, Mr. Cundari held a variety of sales and marketing management positions across multiple medical specialties at Genentech. As Senior Director for the Vascular Franchise, Mr. Cundari was responsible for shaping commercial strategies, leading product launches in cardiology, pulmonary and neurology specialties and establishing strategic partnerships with telemedicine companies. Mr. Cundari holds both a Master of Science and Bachelor of Arts in Psychology from Villanova University.

David Wambeke joined DiaMedica as our Chief Business Officer in April 2023. Prior to joining DiaMedica, Mr. Wambeke served as Partner and Managing Director of Investment Banking at Craig-Hallum Capital Group, LLC, a growth focused investment bank. Mr. Wambeke joined Craig-Hallum in May 2007 and was involved in more than one hundred financing and M&A transactions with a focus on the life sciences and biotech industries. Prior to joining Craig-Hallum, Mr. Wambeke was enlisted in the U.S. Army and served as an artilleryman and military police officer. During a deployment in Baghdad, Iraq, in support of Operation Iraqi Freedom, Mr. Wambeke was wounded in combat and awarded the Purple Heart. Mr. Wambeke received a B.S. from the University of Minnesota.

Julie VanOrsdel Daves, MSHS, CCRP joined DiaMedica as our Senior Vice President, Clinical Development Operations in September 2022. Prior to joining DiaMedica, Ms. Daves served as the Vice President and Global Head of Clinical Operations of Sanifit Therapeutics, S.A., a clinical-stage biopharmaceutical company focused on treatments for progressive vascular calcification disorders, from September 2021 through August 2022. Ms. Daves also served as President and Principal Consultant at JVD Pharma Consulting, LLC, a consulting services company specializing in clinical operations and outsourcing, from February 2018 to August 2022. Ms. Daves served as Vice President of Outsourcing and Vendor Management for Edgewise Therapeutics, Inc., a Nasdaq-listed clinical-stage biopharmaceutical company, from May 2021 to August 2021 and served as Edgewise’s Executive Director and Head of Clinical Operations from April 2020 to May 2021. Prior to Edgewise, from February 2018 to April 2020, Ms. Daves served as Senior Director, Clinical Operations & Head of Outsourcing for miRagen Therapeutics, Inc., a development-stage biotechnology company. From February 2016 to February 2018, Ms. Daves served as Global Head and Senior Director of Clinical Vendor Management of Chiltern International Inc., a contract research organization, and from November 2015 to February 2016, she worked as the Director of Clinical Operations. Prior to her time at Chiltern, Ms. Daves worked for Array Biopharma, Inc. as the Director of Clinical Operations & Development Outsourcing from October 2014 to November 2015, as Associate Director of Clinical Outsourcing and Operations from October 2011 to October 2014, and as Clinical Principal Research Manager from January 2011 to October 2011. Ms. Daves worked as a Senior Manager of Clinical Development for BioCryst Pharmaceuticals, Inc. from April 2007 to January 2011, a Study Manager and Senior Clinical Research Associate for Cellgate Pharmaceuticals, Inc., from July 2006 to April 2007, and as a Clinical Project Manager for Inveresk/Charles River Clinical/Kendle from December 2002 to February 2005. Ms. Daves is a certified clinical research professional and received her MSHS in Clinical Research Administration from The George Washington University School of Medicine and Health Sciences and BS in Zoology from North Carolina State University.

Available Information

We are a corporation governed under British Columbia’s Business Corporations Act (BCBCA). Our company was initially incorporated pursuant to The Corporations Act (Manitoba) by articles of incorporation dated January 21, 2000. Our articles were subsequently amended several times, including on April 11, 2016 to continue the Company from The Corporations Act (Manitoba) to the Canada Business Corporations Act (CBCA) and on May 31, 2019, to continue our existence from a corporation incorporated under the CBCA into British Columbia under the BCBCA.

Our registered office is located at 301-1665 Ellis Street, Kelowna, British Columbia, Canada V1Y 2B3 and our principal executive office is located at our wholly owned subsidiary, DiaMedica USA Inc., located at 301 Carlson Parkway, Suite 210, Minneapolis, Minnesota, USA 55305. Our telephone number is 763-496-5454. Our internet website address is http://www.diamedica.com. Information contained on our website does not constitute part of this report.

We make available, free of charge and through our Internet web site, our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to any such reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission (SEC). Reports filed with the SEC may be viewed at www.sec.gov.