OSE Immunotherapeutics Announces Publication in Frontiers in Immunology on OSE-230, its Novel Agonist Therapy in Chronic Inflammation

Regulatory News:

OSE Immunotherapeutics SA (ISIN: FR0012127173; Mnemo: OSE) (Paris:OSE) today announced the publication of its latest peer-reviewed results on pro-resolutive monoclonal antibody OSE-230, a novel and innovative approach in the management of the resolution of chronic and severe inflammation, in the leading journal Frontiers in Immunology*.

The article, entitled: “ChemR23 activation reprograms macrophages toward a less inflammatory phenotype and dampens carcinoma progression”, reports on ChemR23 expression by Tumor-Associated Macrophages (TAM) and the use of tumor models to explore OSE-230’s pro-resolutive and non-immunosuppressive activity in a chronic severe inflammatory situation associated with cancer and metastasis.

OSE-230’s target, ChemR23, also known as chemerin chemokine-like receptor 1 (CMKLR1), a G-protein coupled receptor (GPCR), is expressed by human TAM, the most frequent infiltrating immune cells in tumors known to modulate pro-tumoral chronic inflammation.

The research demonstrated the reprogramming of TAM through the activation of ChemR23 by OSE-230. ChemR23 receptor strongly controls macrophage phenotype and its activation by OSE-230 results in major remodeling of the tumor immune microenvironment by limiting macrophages’ immunosuppressive functions, activating T lymphocyte activity as well as modifying the metastatic niche.

Aurore Morello, Head of Research of OSE Immunotherapeutics, comments: “We are very pleased with this publication on OSE-230 in the journal ‘Frontiers in Immunology', a leading journal in its field which shares impactful immunological discoveries. The research conducted jointly with the CRCI²NA laboratory (Nantes, Principal investigators: Christophe Blanquart and Sophie Barille) has demonstrated the long-term efficacy of OSE-230 based on the strong expression of ChemR23 in a high inflammatory and severe chronic model. With occurrence of metastases reduced and overall survival extended, these data support the durability of OSE-230’s agonist effect on chronic and severe inflammation. This makes OSE-230 a first-in-class candidate for IND-enabling studies and opens its development pathway in various chronic inflammatory diseases with significant advantage over immunosuppressive therapies”.