Nouscom Presents New Positive Translational Phase 1b Data of NOUS-PEV, a Personalized Neoantigen Cancer Immunotherapy, in a Late-Breaking Abstract at AACR 2023

NOUS-PEV demonstrated good safety and immunogenicity, and induced durable neoantigen-specific T cell responses that were detected for over 6 months and increased T cell infiltration in tumors demonstrating positive anti-tumor activity in solid tumors

BASEL, Switzerland – 18^th April 2023 - Nouscom, a clinical stage immuno-oncology company developing off-the-shelf and personalized viral vector immunotherapies, today announced new translational and biomarker data obtained from the ongoing Phase 1b trial evaluating NOUS-PEV in patients with metastatic melanoma. The data will be presented today in a Late-Breaking session at the 2023 American Association for Cancer Research (AACR) Annual Meeting.

Dr. Elisa Scarselli, Chief Scientific Officer and Co-Founder of Nouscom, said: “These translational data presented at AACR demonstrate NOUS-PEV, in combination with pembrolizumab, induces long-lasting, tumor-infiltrating memory T cells and anti-tumor activity in metastatic melanoma patients, further supporting the mechanism of actions driving clinical efficacy. Our results further validate the immunogenic potency of our viral vector platform targeting shared and personalized neoantigens. We look forward to advancing the clinical development of NOUS-PEV and reporting complete Phase 1 results later this year.”

The abstract reports a greater than 90% success in manufacturing feasibility with a median vaccine release of 8 weeks from biopsy. NOUS-PEV was demonstrated to be safe, well tolerated and highly immunogenic, inducing potent neoantigen-specific CD4 and CD8 T cell responses that were detected for greater than six months in all evaluable patients. Biomarker analysis demonstrated neoantigen-specific increased T cell migration and infiltration in tumors in patients with durable clinical responses. Current clinical efficacy data from six melanoma patients with 11 months median follow up demonstrated 4 partial responses, 1 durable stable disease and 1 progressive disease.

Poster Presentation Details:

• Title: NOUS-PEV, a Personalized Cancer Immunotherapy targeting neoantigens, induces long lasting, tumor infiltrating memory T cells

The abstract is available here.