OSE-127 (Effi-7), in preclinical stage, developed for autoimmune diseases and transplantation

OSE-127 (Effi-7) is a humanized monoclonal antibody targeting the CD 127 receptor — the alpha chain of the Interleukin 7 receptor (IL-7R). Effi-7 possesses a novel mechanism of action: by simultaneously blocking the Interleukin 7 receptor and the formation of new alpha-gamma complex, it induces a strong antagonist effect, resulting in a better control of T-cells.

The Interleukin 7 plays a major role in the pathophysiology of autoimmune diseases such as ulcerative colitis, a pathology developed as part of the consortium EFFIMab (see below).

Proof of concept confirmed in relevant in vitro and in vivo models

OSE-127 (Effi-7) has shown efficacy in preclinical models of T-cell-mediated inflammation, with an immediate and long-lasting effect, conferring the product a novel mechanism of action.

The strategy of blocking IL-7R, which is different from conventional or new anti-inflammatory drugs used in the clinic, demonstrated its efficacy in several preclinical models, restoring the impaired immune balance in inflammatory bowel diseases (references), type 1 diabetes, multiple sclerosis and rheumatoid arthritis. Read more >

It also enabled the promotion of immune tolerance in allotransplantation, as demonstrated by Jean-Paul Soulillou’s team, in collaboration with Efffimune in 2014 (reference). Read more >

License option agreement with Servier to develop and commercialize OSE-127 (Effi-7)

On December 28, 2016, OSE Immunotherapeutics has granted Servier, an independent international pharmaceutical company, a license option on the exclusive worldwide rights for the development and commercialization of its product OSE-127 (Effi-7). These steps will enable the development of the product up to the completion of a phase 2 clinical trial planned in ulcerative colitis, an autoimmune bowel disease (Read the press release).

Attaining preclinical and clinical proofs of concept for OSE-127 (Effi-7) are the main goals of EFFIMab, a multidisciplinary program led by OSE Immunotherapeutics researchers along with several academic and private partners. This €20 million program is funded by the French public investment bank (Bpifrance) under the Industrial-Strategic-Innovation (ISI) program, which will finance a significant portion of the expenses incurred.


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