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Meiji Seika Pharma Co., Ltd, has announced that it initiated a phase I clinical trial of ME3241 (development code), an anti-PD-1 agonist monoclonal antibody discovered through collaborative research with the Foundation for Biomedical Research and Innovation at Kobe headquartered in Japan.
The phase I clinical trial is designed as a randomized, placebo-controlled, double-blind study, with the objective of evaluating the safety and tolerability of ME3241 following single and multiple dosing, as well as its pharmacokinetics and pharmacodynamics.
ME3241 was discovered through a collaborative research programme led by programme director Tasuku Honjo, a professor emeritus at Kyoto University. PD-1 is a molecule expressed on activated T cells and other lymphocytes that suppresses immune responses. Through this research, Meiji Seika Pharma and FBRI identified the conditions required to induce immunosuppression by stimulating PD-1 with antibodies, and these findings were published in Science Immunology on January 13, 2023. ME3241 is a unique anti-PD-1 agonist antibody with enhanced PD-1 agonist activity and has the potential to advance clinical development as a therapeutic agent for inflammatory diseases, including autoimmune diseases caused by excessive immune responses.
Meiji Seika Pharma and Foundation for Biomedical Research and Innovation will continue to collaborate to advance the development of ME3241 and strive to provide meaningful benefits to patients with autoimmune diseases at the earliest opportunity.
Tasuku Honjo, programme director, honorary president, Foundation for Biomedical Research and Innovation at Kobe, said the initiation of the phase I clinical trial of an autoimmune disease therapy by a PD-1 agonist antibody is highly significant, as our finding marks a major milestone in taking a step toward potential therapeutic application for human disease.
This therapeutic approach, which is completely opposite of the widely used cancer therapy employing a PD-1 antagonist antibody, originated from basic research initiated shortly after my appointment as director. After achieving robust results in animal models, we have now reached this clinical stage.
Should safety be confirmed in Phase I, there is strong expectation that the programme will progress to phase II to evaluate efficacy, and subsequently to phase III with the aim of practical implementation. I am truly delighted by this advancement toward the practical realization of the vision of Kobe Biomedical Innovation Cluster.
Takeshi Naruse, senior managing executive officer and head of research & development, Meiji Seika Pharma, said we have been advancing collaborative research with Professor Tasuku Honjo to discover and develop new drug candidates for inflammatory diseases, an area closely related to Meiji Seika Pharma’s focus on infectious diseases. We are pleased to begin a phase I clinical trial of ME3241, a unique PD-1 agonist antibody established based on robust foundational research with Professor Honjo and his colleagues. We will expedite the development of ME3241 and strive to deliver it to patients with autoimmune diseases as soon as possible. ME3241 is an anti-PD-1 agonist antibody discovered through collaborative research with Foundation for Biomedical Research and Innovation.
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