Immune-related Genes in Tumor-specific CD4 and CD8 T Cells in Colon Cancer

Overview

Journal BMC Cancer

Publisher Biomed Central

Specialty Oncology

Date 2020 Jun 24

PMID 32571262

Citations 16

Authors

Xi Yang

Wei Wu

Yuefen Pan

Qing Zhou

Jiamin Xu

Shuwen Han

Affiliations

Soon will be listed here.

Abstract

Background: Immune escape is an immunological mechanism underlying tumorigenesis, and T cells play an important role in this process. In this study, immune-related genes were evaluated in tumor-infiltrating CD4 and CD8 T cells in colon cancer.

Methods: ESTIMATE was used to calculate stromal and immune scores for tumor datasets downloaded from The Cancer Genome Atlas-Colon Cancer (COAD). Differentially expressed genes (DEGs) between samples with high and low stromal and immune scores were screened, followed by a functional enrichment analysis of the overlapping DEGs. The DEGs related to CD4 and the CD8 T cells were then screened. Predicted miRNA-mRNA and lncRNA-miRNA pairs were used to construct a competing endogenous RNA (ceRNA) network. Furthermore, chemical-gene interactions were predicted for genes in the ceRNA network. Kaplan-Meier survival curves were also plotted.

Results: In total, 83 stromal-related DEGs (5 up-regulated and 78 down-regulated) and 1270 immune-related DEGs (807 up-regulated and 293 down-regulated genes) were detected. The 79 overlapping DEGs were enriched for 39 biological process terms. Furthermore, 79 CD4 T cell-related genes and 8 CD8 T cell-related genes, such as ELK3, were screened. Additionally, ADAD1 and DLG3, related to CD4 T cells, were significantly associated with the prognosis of patients with colon cancer. The chr22-38_28785274-29,006,793.1-miR-106a-5p-DDHD1 and chr22-38_28785274-29,006,793.1-miR-4319-GRHL1 axes obtained from CD4 and CD8 T cell-related ceRNAs were identified as candidates for further studies.

Conclusion: ELK3 is a candidate immune-related gene in colon cancer. The chr22-38_28785274-29,006,793.1-miR-106a-5p-DDHD1 and chr22-38_28785274-29,006,793.1-miR-4319-GRHL1 axes may be related to CD4 and CD8 T cell infiltration in colon cancer.

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