Adams, LA and Wang, Z and Liddle, C and Melton, PE and Ariff, A and Chandraratna, H and Tan, J and Ching, H and Coulter, S and de Boer, B and Christophersen, CT and O'Sullivan, TA and Morrison, M and Jeffrey, GP, Bile acids associate with specific gut microbiota, low level alcohol consumption and liver fibrosis in patients with non-alcoholic fatty liver disease, Liver International pp. 1-30. ISSN 1478-3223 (2020) [Refereed Article]
Methods: Adult patients (n=122) underwent liver biopsy and BAs characterization by high-performance liquid chromatography/mass spectrometry. Gut microbiome composition was analysed using next-generation 16S rRNA sequencing. Diet and alcohol intake were determined by 3-day food diary.
Results: Serum and faecal BA concentrations increased progressively between non-NAFLD controls (n=55), NAFLD patients with no/mild fibrosis (F0-2, n=58), and NAFLD with advanced fibrosis (F3/4, n=9). Progressive increases in serum BAs were driven by primary conjugated BA's including glycocholic acid [GCA] and secondary conjugated BA's. In contrast, faecal BA increase was driven by secondary unconjugated BA's (predominately deoxycholic acid [DCA]). Serum GCA levels and faecal DCA levels correlated with the abundance of Bacteroidaceae and Lachnospiraceae, and stool secondary BAs with an unclassifiable family of the order Bacteroidales (Bacteroidales;other). These bacterial taxa were also associated with advanced fibrosis. Modest alcohol consumption was positively correlated with faecal DCA levels and relative abundance of Lachnospiracaea and Bacteroidales;other.
Conclusions: Higher serum and faecal BA levels are associated with advanced fibrosis in NAFLD. Specific gut bacteria link alterations in BA profiles and advanced fibrosis, and may be influenced by low level alcohol consumption.
|Item Type:||Refereed Article|
|Keywords:||non-alcoholic steatohepatitis, fibrosis, microbiome, deoxycholic acid, diet|
|Research Division:||Medical and Health Sciences|
|Research Group:||Clinical Sciences|
|Research Field:||Gastroenterology and Hepatology|
|Objective Group:||Clinical Health (Organs, Diseases and Abnormal Conditions)|
|Objective Field:||Digestive System Disorders|
|UTAS Author:||Melton, PE (Dr Phillip Melton)|
|Deposited By:||Menzies Institute for Medical Research|
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