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Chinese Journal of Colorectal Diseases(Electronic Edition) ›› 2021, Vol. 10 ›› Issue (06): 585-590. doi: 10.3877/cma.j.issn.2095-3224.2021.06.004

• Original Article • Previous Articles     Next Articles

Construction of colorectal cancer prognostic survival prediction model based on RNA-seq data of immune genes

Weihua Li1,(), Pengyu Zhao2, Hongjian Li1, Linjiang Liu1, Yunjie Li3, Fang Zhang3, Haijun Zou4, Yuli Wang1   

  1. 1. Medical Imaging Department, the First Affiliated Hospital of Shenzhen University, the Second People's Hospital of Shenzhen, Shenzhen 518037, China
    2. College of Bioinformatics Science and Technology, Harbin Medical University, Harbin 150081, China
    3. Nuclear Medicine Department, the First Affiliated Hospital of Shenzhen University, the Second People's Hospital of Shenzhen, Shenzhen 518037, China
    4. Pharmacy Department, the First Affiliated Hospital of Shenzhen University, the Second People's Hospital of Shenzhen, Shenzhen 518037, China
  • Received:2021-11-20 Online:2021-12-25 Published:2022-02-12
  • Contact: Weihua Li

Abstract:

Objective

To screen the immune genes related to the prognosis of colorectal cancer and construct a prognostic prediction model.

Methods

Collect immune-related genes from the ImmPort database. The Colon adenocarcinoma (COAD) dataset from The Cancer Genome Atlas (TCGA) database is used to identify prognostic gene features and construct a prognostic survival prediction model, which is validated in the Gene Expression Omnibus (GEO) dataset. Perform gene function enrichment analysis.

Results

A total of 362 immune-related genes that were differentially expressed in patients with colorectal cancer were obtained by differential expression analysis; Thirty-two prognostic-related immune genes were obtained from single-factor COX regression screening. The result of functional enrichment showed that they were related to T cell-mediated immunity. The up-regulation of cell-mediated cytotoxicity was positively correlated; multi-factor COX regression finally determines that SCTR, XCL1, NGF, CD1B, and EREG were the key prognostic risk immune genes for colorectal cancer. The prognostic survival prediction model constructed by 5 genes was used for colorectal cancer. The prognosis of cancer patients has a good predictive rate.

Conclusion

Five-gene characteristics related to immunity are reliable prognostic indicators for patients with COAD and can provide insights for personalized cancer management.

Key words: Colorectal neoplasms, Immunity, Prediction model, Gene signature, Prognosis

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