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Article Abstract
Immune checkpoint inhibitors (ICIs) have yielded remarkable responses but often lead to immune-related adverse events (irAEs). Although germline causes for irAEs have been hypothesized, no individual variant associated with developing irAEs has been identified. We carried out a genome-wide association study of 1,751 patients on ICIs across 12 cancer types. We investigated two irAE phenotypes: (1) high-grade (3-5) and (2) all-grade events. We identified 3 genome-wide significant associations (P < 5 × 10) in the discovery cohort associated with all-grade irAEs: rs16906115 near IL7 (combined P = 3.6 × 10; hazard ratio (HR) = 2.1); rs75824728 near IL22RA1 (combined P = 3.5 × 10; HR = 1.8); and rs113861051 on 4p15 (combined P = 1.2 × 10, HR = 2.0); rs16906115 was replicated in 3 independent studies. The association near IL7 colocalized with the gain of a new cryptic exon for IL7, a critical regulator of lymphocyte homeostasis. Patients carrying the IL7 germline variant exhibited significantly increased lymphocyte stability after ICI initiation, which was itself predictive of downstream irAEs and improved survival.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10958775 | PMC |
| http://dx.doi.org/10.1038/s41591-022-02094-6 | DOI Listing |
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