Vaccinex to Report Promising New Clinical Data Revealing Pepinemab's Unique Mechanism to Enhance Immunotherapy at Annual Meeting of American Association for Cancer Research (AACR)

Core Insights - Pepinemab, a Semaphorin 4D blocking immunotherapy, shows promise in enhancing immune responses and improving survival in patients with metastatic melanoma and head and neck cancer [1][2][4] Company Overview - Vaccinex, Inc. is a clinical-stage biotechnology company focused on innovative treatments for cancer and Alzheimer's disease through the inhibition of Semaphorin 4D [2][8] - The lead drug candidate, pepinemab, is designed to block SEMA4D, which is believed to prevent immune cell infiltration in tumors and trigger inflammation in neurodegenerative diseases [7][8] Clinical Data and Presentations - New data on pepinemab's mechanism to enhance immune responses will be presented at the 2025 Annual Meeting of the American Association for Cancer Research (AACR) [2][3] - Pepinemab has been shown to enhance the maturity of tertiary lymphoid structures (TLS) and correlate with longer recurrence-free survival when combined with immune checkpoint inhibitors in metastatic melanoma patients [5][6] Mechanism of Action - Pepinemab facilitates immune cell interactions within organized centers of immunity, known as tertiary lymphoid structures, by blocking the SEMA4D inhibitory signal to dendritic cells [3][4] - The presence of TLS has been associated with clinical benefits and positive responses to immune checkpoint therapy, making pepinemab a potential solution for inducing TLS in "cold" tumors [4][5] Ongoing Studies - Evaluation of pepinemab in the neoadjuvant setting for head and neck cancer is ongoing, with results expected to be reported at upcoming scientific meetings [6]