A pyroptosis-related gene signature that predicts immune infiltration and prognosis in colon cancer

Frontiers in Oncology

Oncology

Ronghua Yang¹  Sitong Zhou²  Hanpeng Du³  Mingjian Wu³  Shuai Hao⁴  Shuguang Su⁵  Siyuan Du⁵  Xiaoxiang Wang⁶ 

[1] Department of Burn and Plastic Surgery, Guangzhou First People’s Hospital, South China University of Technology, Guangzhou, Guangdong, China;Department of Dermatology, The First People’s Hospital of Foshan, Foshan, Guangdong, China;Department of Gastrointestinal Surgery, Panyu Maternal and Child Care Service Centre of Guangzhou (He Xian Memorial Affiliated Hospital of Southern Medical University), Guangzhou, China;Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China;Department of Pathology, Panyu Maternal and Child Care Service Centre of Guangzhou (He Xian Memorial Affiliated Hospital of Southern Medical University), Guangzhou, China;The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Zhanjiang, Guangdong, China;

关键词: colon cancer;    pyroptosis;    tumor immune microenvironment;    prognosis;    risk signature;   

DOI  :  10.3389/fonc.2023.1173181

 received in 2023-04-11, accepted in 2023-06-23,  发布年份 2023

来源: Frontiers

【 摘 要 】

BackgroundColon cancer (CC) is a highly heterogeneous malignancy associated with high morbidity and mortality. Pyroptosis is a type of programmed cell death characterized by an inflammatory response that can affect the tumor immune microenvironment and has potential prognostic and therapeutic value. The aim of this study was to evaluate the association between pyroptosis-related gene (PRG) expression and CC.MethodsBased on the expression profiles of PRGs, we classified CC samples from The Cancer Gene Atlas and Gene Expression Omnibus databases into different clusters by unsupervised clustering analysis. The best prognostic signature was screened and established using least absolute shrinkage and selection operator (LASSO) and multivariate COX regression analyses. Subsequently, a nomogram was established based on multivariate COX regression analysis. Next, gene set enrichment analysis (GSEA) and gene set variation analysis (GSVA) were performed to explore the potential molecular mechanisms between the high- and low-risk groups and to explore the differences in clinicopathological characteristics, gene mutation characteristics, abundance of infiltrating immune cells, and immune microenvironment between the two groups. We also evaluated the association between common immune checkpoints and drug sensitivity using risk scores. The immunohistochemistry staining was utilized to confirm the expression of the selected genes in the prognostic model in CC.ResultsThe 1163 CC samples were divided into two clusters (clusters A and B) based on the expression profiles of the 33 PRGs. Genes with prognostic value were screened from the DEGs between the two clusters, and an eight PRGs prognostic model was constructed. GSEA and GSVA of the high- and low-risk groups revealed that they were mainly enriched in inflammatory response-related pathways. Compared to those in the low-risk group, patients in the high-risk group had worse overall survival, an immunosuppressive microenvironment, and worse sensitivity to immunotherapy and drug treatment.ConclusionOur findings provide a foundation for future research targeting pyroptosis and new insights into prognosis and immunotherapy from the perspective of pyroptosis in CC.

【 授权许可】

Unknown   
Copyright © 2023 Wu, Hao, Wang, Su, Du, Zhou, Yang and Du