In:
Frontiers in Immunology, Frontiers Media SA, Vol. 12 ( 2021-11-2)
Abstract:
Interferon-gamma (IFN-γ) has a complex role in modulating the tumor microenvironment (TME) during renal cell carcinoma (RCC) development. To define the role of IFN-γ response genes in RCC progression, we characterized the differential gene expression, prognostic implications, and DNA variation profiles of selected IFN-γ response signatures, which exhibited a significant hazard ratio for the overall survival (OS) and progression-free survival (PFS) of papillary, chromophobia, and clear cell RCC (ccRCC) patients ( n = 944). Prognostic nomograms were constructed to predict the outcomes for ccRCC patients, highlighting the prognostic implications of RANBP2-type and C3HC4-type zinc finger containing 1 (RBCK1). Interestingly, large-scale pan-cancer samples ( n = 12,521) and three single-cell RNA datasets revealed that RBCK1 showed markedly differential expression between cancer and normal tissues and significantly correlated with tumor-infiltrating immune cells, tumor purity, and immune checkpoint molecules, such as PD-L1, CTLA-4, LAG-3, and TIGIT in pan-cancer samples. Notably, the TIDE score was significantly higher in the RBCK1 high group compared with the RBCK1 low group in both ccRCC and RCC cohorts. Besides, immunohistochemistry staining showed significantly elevated RBCK1 expression in tumors ( n = 50) compared with kidney samples ( n = 40) from a real-world cohort, Fudan University Shanghai Cancer Center (FUSCC, Shanghai). After RBCK1 expression was confirmed in ccRCC, we found a significantly decreased number of infiltrating CD4 + T cells, CD4 + FOXP3 + Treg cells, M1 macrophages, and CD56 bight/dim NK cells in the immune-cold RBCK1 high group. In addition to the distinct heterogeneous immune microenvironment, the increased expression of RBCK1 predicted a prominently worse prognosis than the RBCK1 low group for 232 ccRCC patients in the FUSCC proteomic cohort. Furthermore, after transfected with siRNA in human ccRCC cells, extraordinarily decreased cell proliferation, migration capacities, and prominently elevated apoptosis tumor cell proportion were found in the siRNA groups compared with the negative control group. In conclusion, this study identified IFN-γ response clusters, which might be used to improve the prognostic accuracy of immune contexture in the ccRCC microenvironment. Immune-cold RBCK1 high patients have pro-tumorigenic immune infiltration and significantly worse outcomes than RBCK1 low patients based on results from multi-omics to real-world data. Our discovery of novel independent prognostic indicators for RCC highlights the association between tumor alterations and immune phenotype.
Type of Medium:
Online Resource
ISSN:
1664-3224
DOI:
10.3389/fimmu.2021.734646
DOI:
10.3389/fimmu.2021.734646.s001
DOI:
10.3389/fimmu.2021.734646.s002
DOI:
10.3389/fimmu.2021.734646.s003
DOI:
10.3389/fimmu.2021.734646.s004
DOI:
10.3389/fimmu.2021.734646.s005
DOI:
10.3389/fimmu.2021.734646.s006
DOI:
10.3389/fimmu.2021.734646.s007
DOI:
10.3389/fimmu.2021.734646.s008
DOI:
10.3389/fimmu.2021.734646.s009
DOI:
10.3389/fimmu.2021.734646.s010
DOI:
10.3389/fimmu.2021.734646.s011
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2606827-8
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