Construction of a gut microbiota-gene-pathway network to reveal the molecular mechanisms underlying right- and left-sided colorectal cancer. Issue 21 (4th December 2021)

• Record Type: Journal Article
• Authors: Du, Kunli; Wang, Xinyou; Li, Shisen; Ren, Jiahui; Li, Ruikai; Wang, Mian; Feng, Fan; Du, Hansong; Zheng, Jianyong
• Is Part Of: FEMS microbiology letters. Volume 368:Issue 21/24(2021)
• Publication Date: 2021-12-04
• Subjects: right-sided colorectal cancer -- left-sided colorectal cancer -- microbiota -- prognosis -- KEGG pathway -- interaction network; Microbiology -- Periodicals; 579
• DOI: 10.1093/femsle/fnab145
• Languages: English
• ISSNs: 0378-1097

Abstract

ABSTRACT: Aiming to reveal the molecular mechanisms involved in right- and left-sided colorectal cancer (CRC) development, CRC gene expression data and a microorganism atlas were downloaded from The Cancer Genome Atlas and The Cancer Microbiome Atlas, respectively. The R package was used to screen differentially expressed genes ( DEGs) between right- and left-sided CRC samples and identify those related to prognosis, a correlation analysis was performed between DEGs and prognosis-related microbiota, and an interaction network was created using Cytoscape. Finally, a taxon set enrichment analysis of the microbiota was performed and a gene-genus-pathway network was constructed after GO and KEGG analyses. In total, nine out of 1557 identified DEGs had a significant correlation with prognosis, whereas three out of 211 bacterial genera ( Fusobacterium, Bacteroides and Parabacteroides ) showed a significant correlation with prognosis. DEGs were mainly enriched in the PPAR pathway and vitamin metabolic and transport processes. According to a taxon set enrichment analysis, the microbes in the integrated network were significantly abundant in 28 host-intrinsic, two host-extrinsic and one environment taxon sets. This study provides new insights for understanding the molecular mechanisms of left- and right-CRC. Abstract : This study provides new insights for understanding the molecular mechanisms of left- and right-CRC.