CytoDyn Signs Groundbreaking Memorandum of Understanding with Thai Red Cross AIDS Research Centre to Study Pre-Exposure Prophylaxis Use of Leronlimab (PRO 140) in People at High Risk of Acquiring HIV
VANCOUVER, Washington, June 17, 2019 (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 a Memorandum of Understanding (“MOU”) with Thai Red Cross AIDS Research Centre (“TRCARC”) for the design and conduct of a pre-exposure prophylaxis (PrEP) clinical trial of leronlimab (PRO 140) in subjects at high risk of HIV infection. The trial is based on positive results in a pre-clinical study. CytoDyn’s financial contribution to this trial will be limited to supplying TRCARC with the necessary quantities of leronlimab. TRCARC will secure all necessary regulatory permissions, and ensure that the PrEP trial is conducted in a timely manner under mutually agreed upon clinical trial protocols. Results of the trial could potentially be used for label extension of leronlimab (PRO 140) in other jurisdictions, including potentially with the U.S. Food and Drug Administration (“FDA”).
“The rationale for the use of leronlimab as PrEP is grounded in the long-standing observation that individuals deficient for the CCR5 co-receptor are nearly completely resistant to sexual transmission of HIV,” said Dr. Jonah Sacha, Associate Professor of the Oregon Health & Science University. Dr. Sacha continued, “Given the difficulties many patients face with adherence to daily oral antiretroviral therapy drugs as PrEP, once-weekly leronlimab as PrEP could be transformative in slowing the epidemic.”
“I am thankful to Dr. Sacha for his investigational study of leronlimab that led to this opportunity for CytoDyn to collaborate with Thai Red Cross AIDS Research Centre,” stated Dr. Nader Pourhassan, President and CEO of CytoDyn. “We look forward to our collaboration with TRCARC to deliver quality, insightful, and timely clinical data that could further inform and validate the value of leronlimab,” he continued. “The only product currently in use for PrEP is Truvada, which was approved for HIV therapy in 2004, followed by a label expansion for PrEP a few years later. Truvada is a daily pill and has shown great results for use in PrEP. Thanks to Truvada, the number of new infected HIV patients in the U.S. in 2018 continued to decline. It is our understanding that Truvada has been used for PrEP by over 130,000 men and women in 2018. We believe that leronlimab, if approved as a combination therapy for highly treatment experienced people, could have multiple label expansion opportunities, including monotherapy and potentially PrEP. We are thankful for the opportunity to initiate this very important PrEP study now, so that if it is successful, we can move forward expeditiously in the event leronlimab is approved as a combination therapy. CytoDyn’s obligation under this agreement with TRCARC is to provide leronlimab without any other financial obligation,” concluded Dr. Pourhassan.
“We are excited to have the opportunity to partner with CytoDyn and their highly innovative and paradigm-shifting weekly self-injectable leronlimab,” stated Dr. Nittaya Phanuphak, Chief of PREVENTION and Chief of SEARCH (South East Asia Research Collaboration on HIV) at the Thai Red Cross AIDS Research Centre. “People who are at high-risk of getting HIV infection need various HIV prevention options that could fit different lifestyles and address barriers to consistent use. Leronlimab has high potential to be a very practical HIV prevention tool, both for clients and providers,” continued Dr. Phanuphak. “We look forward to moving forward to initiate this groundbreaking clinical trial,” concluded Dr. Phanuphak.
About Leronlimab (PRO 140)
The U.S. Food and Drug Administration (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 700 people, including meeting its primary endpoints in a pivotal Phase 3 trial (leronlimab in combination with standard anti-retroviral 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 >98% in a murine xenograft model. CytoDyn is therefore conducting a Phase 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 graft-versus-host disease (GvHD).
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 graft-vs-host disease (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 2019 for that indication. CytoDyn is also conducting a Phase 3 investigative trial with leronlimab (PRO 140) 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 (PRO 140) 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 four years. CytoDyn is also conducting a Phase 2 trial to evaluate leronlimab for the prevention of GvHD and has received clearance to initiate a clinical trial with leronlimab in metastatic triple-negative breast cancer. More information is at www.cytodyn.com.
This press release contains certain forward-looking statements that involve risks, uncertainties and assumptions that are difficult to predict. Words and expressions reflecting optimism, satisfaction or disappointment with current prospects, as well as words such as “believes,” “hopes,” “intends,” “estimates,” “expects,” “projects,” “plans,” “anticipates” and variations thereof, or the use of future tense, identify forward-looking statements, but their absence does not mean that a statement is not forward-looking. The Company’s forward-looking statements are not guarantees of performance, and actual results could vary materially from those contained in or expressed by such statements due to risks and uncertainties including: (i) the sufficiency of the Company’s cash position, (ii) the Company’s ability to raise additional capital to fund its operations, (iii) the Company’s ability to meet its debt obligations, if any, (iv) the Company’s ability to enter into partnership or licensing arrangements with third parties, (v) the Company’s ability to identify patients to enroll in its clinical trials in a timely fashion, (vi) the Company’s ability to achieve approval of a marketable product, (vii) the design, implementation and conduct of the Company’s clinical trials, (viii) the results of the Company’s clinical trials, including the possibility of unfavorable clinical trial results, (ix) the market for, and marketability of, any product that is approved, (x) the existence or development of vaccines, drugs, or other treatments that are viewed by medical professionals or patients as superior to the Company’s products, (xi) regulatory initiatives, compliance with governmental regulations and the regulatory approval process, (xii) general economic and business conditions, (xiii) changes in foreign, political, and social conditions, and (xiv) various other matters, many of which are beyond the Company’s control. The Company urges investors to consider specifically the various risk factors identified in its most recent Form 10-K, and any risk factors or cautionary statements included in any subsequent Form 10-Q or Form 8-K, filed with the Securities and Exchange Commission. Except as required by law, the Company does not undertake any responsibility to update any forward-looking statements to take into account events or circumstances that occur after the date of this press release.
Nader Pourhassan, Ph.D.
President & CEO
Marek Ciszewski, J.D.
Released June 17, 2019