Prognostic value of LRRC4C in Colon and Gastric Cancers correlates with Tumour Microenvironment Immunity

Int J Biol Sci. 2021 Apr 3;17(5):1413-1427. doi: 10.7150/ijbs.58876. eCollection 2021.

Abstract

In this study, we aimed to use ESTIMATE and CIBERSORT computational methods to analyse transcriptional information on COAD and STAD in TCGA. We downloaded transcriptome RNA-seq data of 446 patients with colon cancer from TCGA and estimated the amount of immune and stromal components in the COAD samples using CIBERSORT algorithms. We analysed differentially expressed genes in 446 TCGA samples and 585 Series GSE39582 samples, in high- and low-scoring groups, using Cox regression. The expression of LRRC4C, correlated positively with clinicopathological characteristics and negatively with the survival of patients with COAD. Single-gene survival analysis using Gene Expression Profiling Interactive Analysis 2.0 and Kaplan-Meier plotter revealed an association between high levels of LRRC4C expression and poor prognosis in patients with colon and gastric cancers. Gene set enrichment analysis of COAD and STAD samples indicated that genes in groups expressing high and low LRRC4C levels were mainly enriched in immune-related activities and metabolic pathways, respectively. Difference and correlation analyses of the relationship between LRRC4C expression and tumour-infiltrating immune cells, determined using CIBERSORT algorithms, revealed that monocytes, resting mast cells, and M2 macrophages were positively correlated with LRRC4C expression.

Keywords: CIBERSORT; ESTIMATE; LRRC4C; TME; colon cancer; gastric cancer.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomarkers, Tumor / analysis
  • Colonic Neoplasms* / diagnosis
  • Colonic Neoplasms* / immunology
  • Correlation of Data
  • Gene Expression Profiling / methods
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Immunity, Cellular
  • Kaplan-Meier Estimate
  • Nerve Tissue Proteins / metabolism*
  • Prognosis
  • Proportional Hazards Models
  • Receptors, Cell Surface / metabolism*
  • Sequence Analysis, RNA / methods
  • Stomach Neoplasms* / diagnosis
  • Stomach Neoplasms* / immunology
  • Stromal Cells / immunology
  • Stromal Cells / pathology
  • Transcriptome*
  • Tumor Microenvironment / immunology*

Substances

  • Biomarkers, Tumor
  • LRRC4C protein, human
  • Nerve Tissue Proteins
  • Receptors, Cell Surface