(American Association for Cancer Research (AACR), 2015) Van Allen, Eliezer; Golay, H. G.; Liu, Yan; Koyama, S.; Wong, Kwok-Kin; Taylor-Weiner, Amaro; Giannakis, Marios; Harden, M.; Rojas-Rudilla, V.; Chevalier, A.; Thai, T.; Lydon, C.; Mach, S.; Wong, J. A.; Rabin, A. R.; Helmkamp, J.; Sholl, Lynette; Carter, Scott; Oxnard, Geoffrey; Janne, Pasi; Getz, Gad; Lindeman, Neal; Hammerman, Peter S.; Garraway, Levi; Hodi, Frank; Rodig, Scott; Dranoff, Glenn; Barbie, David
PD-1 immune checkpoint blockade occasionally results in durable clinical responses in advanced metastatic cancers. However, mechanism-based predictors of response to this immunotherapy remain incompletely characterized. We performed comprehensive genomic profiling on a tumor and germline sample from a patient with refractory lung adenocarcinoma who achieved marked long-term clinical benefit from anti-PD-L1 therapy. We discovered activating somatic and germline amino acid variants in JAK3 that promoted PD-L1 induction in lung cancer cells and in the tumor immune microenvironment. These findings suggest that genomic alterations that deregulate cytokine receptor signal transduction could contribute to PD-L1 activation and engagement of the PD-1 immune checkpoint in lung cancer.
