Vaccinex, Inc. (Nasdaq: VCNX, Vaccinex, the Company), a clinical-stage biotechnology company pioneering a differentiated approach to treating cancer and neurodegenerative disease through the inhibition of semaphorin 4D (SEMA4D), today reported positive interim response data in the Phase Ib segment of the KEYNOTE-B84 study of Vaccinex’s pepinemab in combination with Merck’s (known as MSD outside of the United States and Canada) anti-PD-1 therapy KEYTRUDA (pembrolizumab) in patients with recurrent or metastatic head and neck squamous cell carcinoma (R/M HNSCC).
Among the three patients enrolled in the Phase1b safety segment of the study, two patients have been observed to experience a complete response (CR), as per RECIST v.1.1. Biomarker analysis revealed that tumors in both responders expressed low levels of PD-L1 biomarker (CPS<20), a subset of HNSCC patients who have historically low response rates to anti-PD-1/L1 antibodies administered as single agents.
https://finance.yahoo.com/news/vaccinex-reports-two-complete-responses-130000113.html
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