U.S. Food and Drug Administration (FDA) Grants Emergency IND for Two Coronavirus Patients Treated in New York with CytoDyn’s Leronlimab


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leronlimab (PRO 140)

 

VANCOUVER, Washington, March 19, 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 that two coronavirus patients were treated with the Company’s investigational new drug, leronlimab. The treatment was administered at a leading medical center in the New York City area under an emergency Investigational New Drug (IND) recently granted by the U.S. Food and Drug Administration (FDA). Leronlimab is intended to serve as a therapy for patients who experience respiratory illness as a result of contracting the Coronavirus Disease 2019 (COVID-19). The treatment of these patients was not under the Company’s proposed randomized controlled Phase 2 clinical trial protocol recently submitted to the FDA.

Bruce Patterson M.D., CEO of IncellDX and advisor to CytoDyn, added, “Leronlimab binds to the CCR5 receptor inhibiting the migration of macrophages and the release on inflammatory cytokines including TNF and IL-6. This release of cytokines is what is commonly referred to as the 'cytokine storm' and is believed to cause profound damage in the lungs in some patients. In addition, leronlimab can block Regulatory T cells (Tregs), which can inhibit the innate immune response against pathogens, into areas of inflammation. These combined mechanisms of action may reduce the morbidity and mortality in moderate to severe cases of COVID-19, preventing the acute respiratory distress syndrome associated with this highly destructive and potentially fatal disease.”

Nader Pourhassan, Ph.D., president and chief executive officer of CytoDyn said, “We are very pleased that we have a potential treatment option for patients affected by COVID-19 infection. To be very clear, leronlimab does not kill the novel coronavirus. It acts as a CCR5 antagonist by blocking pro-inflammatory cytokines, which prevents cytokine storm and thus could be useful in treatment of COVID-19. Leronlimab is administered as a once-a-week injection. It has a strong safety profile demonstrated in nine clinical trials with over 800 people and is available for urgent treatment. If results are promising, we have leronlimab available for immediate use and the ability to scale production. We are open and willing to work with government agencies and pharmaceutical partnerships to assist in serving those in dire need of a treatment option for this devastating disease. We appreciate the FDA’s prompt response and are working in full support of the treating medical team.”

About Coronavirus Disease 2019

The Coronavirus Disease 2019 (COVID-19) was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China. The origin of COVID-19 is uncertain and it is unclear how easily the virus spreads. COVID-19 is thought to be transmitted 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. It is believed that symptoms of COVID-19 may appear in as few as two days or as long as 14 days after exposure, and that symptoms in patients have ranged from non-existent to severe and fatal. At this time, there are very limited 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 successfully 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 can 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 plays an important role in tumor invasion and metastasis. 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.  Additional research is being conducted with leronlimab in the setting of cancer and NASH with plans to conduct additional clinical studies when appropriate.

The CCR5 receptor appears to play a central role in modulating immune cell trafficking to sites of inflammation and may be important 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 further support the concept that the CCR5 receptor on engrafted cells is critical for the development of acute GvHD and that blocking this receptor from recognizing certain 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.

About CytoDyn

CytoDyn is a 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 key 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 in immune-mediated illnesses, such as GvHD and NASH. CytoDyn has successfully completed a Phase 3 pivotal trial with leronlimab in combination with standard anti-retroviral 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 the first quarter 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 and plans to initiate a registration-directed study of leronlimab monotherapy indication, which if successful, 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, results from a Phase 2b clinical trial demonstrated that leronlimab monotherapy can prevent viral escape in HIV-infected patients, with some patients on leronlimab monotherapy remaining 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.

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