Premium
Biomarker and Genomic Risk Factors for Liver Function Test Abnormality in Hazardous Drinkers
Author(s) -
Whitfield John B.,
Zhu Gu,
Madden Pamela A. F.,
Montgomery Grant W.,
Heath Andrew C.,
Martin Nicholas G.
Publication year - 2019
Publication title -
alcoholism: clinical and experimental research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.267
H-Index - 153
eISSN - 1530-0277
pISSN - 0145-6008
DOI - 10.1111/acer.13949
Subject(s) - medicine , alcoholic liver disease , liver function tests , cirrhosis , transferrin saturation , liver disease , liver function , gastroenterology , ferritin , gamma glutamyltransferase , biomarker , physiology , endocrinology , biology , biochemistry , serum ferritin , enzyme
Background Alcohol dependence and long‐term excessive alcohol use may cause liver damage, but only some patients develop cirrhosis. Similarly, high alcohol intake without evident liver disease often but not always produces abnormal enzymatic liver function tests (LFTs), particularly gamma‐glutamyl transferase ( GGT ). We postulate that the factors predisposing to cirrhosis in alcoholics and to liver enzyme abnormality in drinkers are similar, and that biochemical LFTs could therefore be useful as markers of risk of alcoholic liver disease in excessive drinkers. Methods Data from participants in twin and twin‐family studies on alcohol use and dependence were used to identify 1,003 people who had reported excessive alcohol intake (28 drinks or more per week). A total of 962 of these provided blood for biochemical tests at the same time. Body mass index ( BMI ) and biomarkers of metabolic syndrome, inflammation, and iron stores were used in logistic regression with abnormality in serum GGT , alanine aminotransferase ( ALT ), or aspartate aminotransferase ( AST ) as outcomes. We conducted genome‐wide association analyses for GGT , ALT , and AST separately in the group reporting excessive alcohol intake ( N = 951) and a low‐intake group reporting 14 drinks or fewer per week ( N = 8,716), and compared results. Results Abnormal GGT and ALT among excessive drinkers were associated with higher BMI , triglycerides, insulin, uric acid, C‐reactive protein, ferritin, and transferrin saturation; and with lower high‐density‐lipoprotein cholesterol. Abnormal AST was associated with triglycerides, ferritin, and transferrin saturation. ALT was significantly associated with variants at reported genetic loci for alcoholic liver disease ( PNPLA 3 , rs738409, p = 0.0076; TM 6 SF 2 , rs10401969, p = 0.0076; HSD 17B13 , rs10433879, p = 0.0024). Conclusions Known risk factors for alcoholic cirrhosis including obesity and markers of metabolic syndrome, iron overload and inflammation are associated with liver enzyme abnormality in excessive drinkers.