CI has a manageable safety profile and leads to increased intratumoral cytotoxic effector T cells. https://clinicaltrials.gov/study/NCT03153410, identifier NCT03153410.
High myeloid and Treg signatures correlated with poor responses. We conclude that GVAX/CRS-207 plus nivolumab and ipilimumab successfully generates and expands T-cell clones specific to mesothelin and mutant KRAS within the PDAC TME but immunotherapy-induced myeloid-cell enrichment remains a barrier to greater efficacy.
5 months ago
P2 data • Journal • PD(L)-1 Biomarker • IO biomarker
The addition of combined immunotherapy and SBRT was safe and feasible in this patient population. No difference was observed in the mean CD8 T cell density between study patients and historical controls. These findings support the need for better characterization of how neoadjuvant immunotherapy may shift the phenotype of the PDAC TME.