The gut microbiota at the intersection of bile acids and intestinal carcinogenesis: An old story, yet mesmerizing

• Published in: International journal of cancer 2020-04, Vol.146 (7), p.1780-1790
• Main Authors: Liu, Tianyu, Song, Xueli, Khan, Samiullah, Li, Yun, Guo, Zixuan, Li, Chuqiao, Wang, Sinan, Dong, Wenxiao, Liu, Wentian, Wang, Bangmao, Cao, Hailong
• Format: Article
• Language: English
• Subjects: Acids; Animals; Bile; bile acid; Bile acids; Bile Acids and Salts - metabolism; Biological Therapy; Biomarkers; Cancer; Carcinogenesis; Cell Transformation, Neoplastic - metabolism; Colorectal cancer; Colorectal carcinoma; Colorectal Neoplasms - etiology; Colorectal Neoplasms - metabolism; Colorectal Neoplasms - pathology; Colorectal Neoplasms - therapy; Digestive system; Dysbiosis; farnesoid X receptor; Fecal microflora; G protein‐coupled bile acid receptor 1; Gastrointestinal Microbiome - drug effects; Gastrointestinal tract; gut microbiota; Humans; Intestinal microflora; Intestinal Mucosa - metabolism; Intestinal Mucosa - microbiology; Intestinal Mucosa - pathology; Intestine; Medical research; Metabolic Networks and Pathways - drug effects; Metabolism; Metabolites; Metformin; Microbiota; Molecular Targeted Therapy; Probiotics; Protein Binding; Receptors, Cytoplasmic and Nuclear - metabolism; Transplantation; Ursodeoxycholic acid
• ISSN: 0020-7136; 1097-0215
• DOI: 10.1002/ijc.32563

The prevalence of colorectal cancer (CRC) has markedly increased worldwide in the last decade. Alterations of bile acid metabolism and gut microbiota have been reported to play vital roles in intestinal carcinogenesis. About trillions of bacteria have inhabited in the human gut and maintained the balance of host metabolism. Bile acids are one of numerous metabolites that are synthesized in the liver and further metabolized by the gut microbiota, and are essential in maintaining the normal gut microbiota and lipid digestion. Multiple receptors such as FXR, GPBAR1, PXR, CAR and VDR act as sensors of bile acids have been reported. In this review, we mainly discussed interplay between bile acid metabolism and gut microbiota in intestinal carcinogenesis. We then summarized the critical role of bile acids receptors involving in CRC, and also addressed the rationale of multiple interventions for CRC management by regulating bile acids–microbiota axis such as probiotics, metformin, ursodeoxycholic acid and fecal microbiota transplantation. Thus, by targeting the bile acids–microbiota axis may provide novel therapeutic modalities in CRC prevention and treatment.