First Patient Treated with Leronlimab in Phase 2b/3 Trial for COVID-19
VANCOUVER, Washington, April 15, 2020 (GLOBE NEWSWIRE) -- CytoDyn Inc. (OTC.QB: CYDY), (“CytoDyn” or the “Company"), a late-stage biotechnology company developing leronlimab (PRO 140), a CCR5 antagonist with the potential for multiple therapeutic indications, announced today the treatment of the first patient with leronlimab in its Phase 2b/3 trial for severe and critical COVID-19 indications. About 30 patients have been administered leronlimab under Emergency Investigational New Drug (EIND) authorizations granted by the U.S. Food and Drug Administration (FDA) and about 15 patients have been enrolled in our current Phase 2b mild-to-moderate COVID-19 patients.
The Company recently received clearance from the FDA to commence enrollment in this Phase 2b/3 clinical trial for severe and critically ill COVID-19 patients. The Phase 2b/3 trial is for 390 patients, double blinded with 2:1 ratio (active drug to placebo ratio). Patients enrolled in this trial are expected to be administered leronlimab for two weeks with the primary endpoint being the mortality rate at 28 days and a secondary endpoint of mortality rate at 14 days. The Company will perform an interim analysis on the data from 50 patients.
Concurrently, the Company has about 15 patients enrolled in its Phase 2 randomized clinical trial for mild-to-moderate COVID-19 population in the U.S. Thus far, over 30 COVID-19 patients have been treated with leronlimab in hospitals and clinics throughout the country.
Bruce Patterson, M.D., Chief Executive Officer and founder of IncellDx, a diagnostic partner and an advisor to CytoDyn, commented, “We are very excited to start our Phase2b/3 trial in patients with severe COVID-19. Based on the promising results from the EIND patients, we are hopeful that this randomized, placebo-controlled trial will give us the data needed for FDA approval and ultimately the basis to use leronlimab to save lives in this pandemic.”
Nader Pourhassan, Ph.D., President and Chief Executive Officer of CytoDyn, said, “We continue to support the medical community’s increasing demand for leronlimab and are pleased for the severely ill patients now enrolling in our Phase 2b/3 trial. We are hopeful that they will experience like therapeutic benefits demonstrated by many similar patients treated under EINDs. We are humbled by the dedication and courage exhibited by our medical professionals every day in their tireless efforts to combat this horrific pandemic.”
About Coronavirus Disease 2019
SARS-CoV-2 was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China. The origin of SARS-CoV-2 causing the COVID-19 disease is uncertain, and the virus is highly contagious. COVID-19 typically transmits person to person through respiratory droplets, commonly resulting from coughing, sneezing, and close personal contact. Coronaviruses are a large family of viruses, some causing illness in people and others that circulate among animals. For confirmed COVID-19 infections, symptoms have included fever, cough, and shortness of breath. The symptoms of COVID-19 may appear in as few as two days or as long as 14 days after exposure. Clinical manifestations in patients have ranged from non-existent to severe and fatal. At this time, there are minimal treatment options for COVID-19.
About Leronlimab (PRO 140)
The FDA has granted a “Fast Track” designation to CytoDyn for two potential indications of leronlimab for deadly diseases. The first as a combination therapy with HAART for HIV-infected patients and the second is for metastatic triple-negative breast cancer. Leronlimab is an investigational humanized IgG4 mAb that blocks CCR5, a cellular receptor that is important in HIV infection, tumor metastases, and other diseases, including NASH. Leronlimab has completed nine clinical trials in over 800 people, including meeting its primary endpoints in a pivotal Phase 3 trial (leronlimab in combination with standard antiretroviral therapies in HIV-infected treatment-experienced patients).
In the setting of HIV/AIDS, leronlimab is a viral-entry inhibitor; it masks CCR5, thus protecting healthy T cells from viral infection by blocking the predominant HIV (R5) subtype from entering those cells. Leronlimab has been the subject of nine clinical trials, each of which demonstrated that leronlimab could significantly reduce or control HIV viral load in humans. The leronlimab antibody appears to be a powerful antiviral agent leading to potentially fewer side effects and less frequent dosing requirements compared with daily drug therapies currently in use.
In the setting of cancer, research has shown that CCR5 may play a role in tumor invasion, metastases, and tumor microenvironment control. Increased CCR5 expression is an indicator of disease status in several cancers. Published studies have shown that blocking CCR5 can reduce tumor metastases in laboratory and animal models of aggressive breast and prostate cancer. Leronlimab reduced human breast cancer metastasis by more than 98% in a murine xenograft model. CytoDyn is, therefore, conducting a Phase 1b/2 human clinical trial in metastatic triple-negative breast cancer and was granted Fast Track designation in May 2019.
The CCR5 receptor appears to play a central role in modulating immune cell trafficking to sites of inflammation. It may be crucial in the development of acute graft-versus-host disease (GvHD) and other inflammatory conditions. Clinical studies by others further support the concept that blocking CCR5 using a chemical inhibitor can reduce the clinical impact of acute GvHD without significantly affecting the engraftment of transplanted bone marrow stem cells. CytoDyn is currently conducting a Phase 2 clinical study with leronlimab to support further the concept that the CCR5 receptor on engrafted cells is critical for the development of acute GvHD, blocking the CCR5 receptor from recognizing specific immune signaling molecules is a viable approach to mitigating acute GvHD. The FDA has granted “orphan drug” designation to leronlimab for the prevention of GvHD.
CytoDyn is a late-stage biotechnology company developing innovative treatments for multiple therapeutic indications based on leronlimab, a novel humanized monoclonal antibody targeting the CCR5 receptor. CCR5 appears to play a critical role in the ability of HIV to enter and infect healthy T-cells. The CCR5 receptor also appears to be implicated in tumor metastasis and immune-mediated illnesses, such as GvHD and NASH. CytoDyn has successfully completed a Phase 3 pivotal trial with leronlimab in combination with standard antiretroviral therapies in HIV-infected treatment-experienced patients. CytoDyn plans to seek FDA approval for leronlimab in combination therapy and plans to complete the filing of a Biologics License Application (BLA) in April of 2020 for that indication. CytoDyn is also conducting a Phase 3 investigative trial with leronlimab as a once-weekly monotherapy for HIV-infected patients. CytoDyn plans to initiate a registration-directed study of leronlimab monotherapy indication. If successful, it could support a label extension. Clinical results to date from multiple trials have shown that leronlimab can significantly reduce viral burden in people infected with HIV with no reported drug-related serious adverse events (SAEs). Moreover, a Phase 2b clinical trial demonstrated that leronlimab monotherapy can prevent viral escape in HIV-infected patients; some patients on leronlimab monotherapy have remained virally suppressed for more than five years. CytoDyn is also conducting a Phase 2 trial to evaluate leronlimab for the prevention of GvHD and a Phase 1b/2 clinical trial with leronlimab in metastatic triple-negative breast cancer. More information is at www.cytodyn.com.
Source: CytoDyn Inc.
Posted: April 2020