DAEJEON, South Korea, Dec. 12, 2022 /PRNewswire/ -- PharmAbcine Inc. (KOSDAQ: 208340ks), a clinical-stage biotech company focusing on the development of next-generation antibody therapeutics, announced today that the Company has entered into a clinical collaboration agreement with MSD (Merck & Co., Inc., Rahway, NJ., USA), to initiate a Phase I combination trial of PMC-309, a novel anti-VISTA (V-domain Ig suppressor of T cell activation) antibody, in combination with KEYTRUDA® (pembrolizumab), MSD's anti-PD-1 therapy. Under the terms of the agreement, PharmAbcine will sponsor a Phase I study in Australia to evaluate the safety and clinical efficacy of the combination therapy for the treatment of multiple advanced solid tumors, and MSD will supply KEYTRUDA. Dr. Yoo also added, "In comparison to the existing immuno-oncology drugs that directly activate T cells, PMC-309's distinct mechanism of indirectly activating T cells by inhibiting immunosuppressive cells may represent a novel strategy for patients who do not respond well or have become resistant to the existing treatments and are in need of new therapies. "We are optimistic about PMC-309's best-in-class potential, and we are particularly excited to continue to evaluate it in combination with KEYTRUDA, one of the key leading molecules in cancer immunotherapy." Further details of agreement and clinical protocols were not disclosed.
KEYTRUDA® is a registered trademark of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA. In the nonclinical studies, it has been discovered that PMC-309 can promote both innate immunity (monocyte activation, M1 macrophage proliferation) and adaptive immunity (T cell activation) unlike the existing drugs which show significant changes only in adaptive immunity. In addition, the in vivo data showed that PMC-309 demonstrated significantly improved tumor growth inhibition when used in combination with an anti-PD-1 drug compared to both monotherapies of PMC-309 and an anti-PD-1 drug. These findings suggest that PMC-309 can offer a new treatment strategy in immuno-oncology area as it can be used in combination with other drugs to improve their low-response rates. The GLP-Toxicology studies were already completed, and no serious safety issues were observed. The Company plans to submit Clinical Trial Application in early 2023.
The Company's main pipeline assets include olinvacimab, the lead asset in clinical stage, and IND-ready preclinical assets with first-in-class potential such as PMC-309 and PMC-403. Olinvacimab, the Company's lead asset, is undergoing a Phase II trial in combination with MSD's pembrolizumab for mTNBC patients in Australia. The Company entered the Phase II study to reconfirm the encouraging result from Phase Ib olinvacimab-pembrolizumab trial, delivering 50% ORR, 67% DCR, and clean safety profile. PMC-309, a novel anti-VISTA-antagonizing IgG in pan pH, is an immune checkpoint regulator that targets MDSC (myeloid derived suppressor cells) and M2 macrophages which play pivotal role in maintaining immunosuppressive TME (Tumor Microenvironment). The Company plans to submit Clinical Trial Application for a Phase I study in late 2022. One of other early-stage assets, PMC-005, is an anti-EGFRviii IgG that only binds to EGFRviii expressed on cancer cells and can be applied to various modalities including CAR-T, CAR-NK, CAR-Macrophage, T cell/NK cell engager, and Radio-Immunotherapy For additional information about PharmAbcine, visit http://www.pharmabcine.com or follow on Youtube and Linkedin. For licensing deals, joint venture, co-development, and collaboration in research or antibody discovery inquiries, please contact:
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