| First Author | Liu XD | Year | 2020 |
| Journal | Nat Commun | Volume | 11 |
| Issue | 1 | Pages | 2135 |
| PubMed ID | 32358509 | Mgi Jnum | J:292350 |
| Mgi Id | MGI:6447381 | Doi | 10.1038/s41467-020-15959-6 |
| Citation | Liu XD, et al. (2020) PBRM1 loss defines a nonimmunogenic tumor phenotype associated with checkpoint inhibitor resistance in renal carcinoma. Nat Commun 11(1):2135 |
| abstractText | A non-immunogenic tumor microenvironment (TME) is a significant barrier to immune checkpoint blockade (ICB) response. The impact of Polybromo-1 (PBRM1) on TME and response to ICB in renal cell carcinoma (RCC) remains to be resolved. Here we show that PBRM1/Pbrm1 deficiency reduces the binding of brahma-related gene 1 (BRG1) to the IFNgamma receptor 2 (Ifngr2) promoter, decreasing STAT1 phosphorylation and the subsequent expression of IFNgamma target genes. An analysis of 3 independent patient cohorts and of murine pre-clinical models reveals that PBRM1 loss is associated with a less immunogenic TME and upregulated angiogenesis. Pbrm1 deficient Renca subcutaneous tumors in mice are more resistance to ICB, and a retrospective analysis of the IMmotion150 RCC study also suggests that PBRM1 mutation reduces benefit from ICB. Our study sheds light on the influence of PBRM1 mutations on IFNgamma-STAT1 signaling and TME, and can inform additional preclinical and clinical studies in RCC. |
