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FTO Polymorphisms are Associated with Metabolic Dysfunction-Associated Fatty Liver Disease (MAFLD) Susceptibility in the Older Chinese Han Population

Authors Gu Z, Bi Y, Yuan F, Wang R, Li D, Wang J, Hu X, He G, Zhang L, Liu B

Received 1 April 2020

Accepted for publication 26 June 2020

Published 11 August 2020 Volume 2020:15 Pages 1333—1341


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Zhi-Ying Wu

Zhan Gu,1,* Yan Bi,2,* Fan Yuan,2,* Ruirui Wang,1 Dong Li,3 Jianying Wang,1 Xiaojuan Hu,1 Guang He,2 Lei Zhang,1 Bao-cheng Liu1

1Shanghai Innovation Center of TCM Health Service, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People’s Republic of China; 2Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, People’s Republic of China; 3Zhangjiang Community Health Service Center of Pudong New District, Shanghai, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Bao-cheng Liu Email [email protected]

Background: As fat and obesity play a vital role in the pathophysiology of metabolic dysfunction-associated fatty liver disease (MAFLD), this study aims to investigate the association between the fat mass and obesity-associated gene (FTO) and MAFLD.
Methods: Six SNPs (rs6499640, rs1421085, rs8050136, rs3751812, rs9939609 and rs9930506) within FTO were genotyped for 741 MAFLD patients (median age, 69.98; interquartile range, 66.55– 75.93) and 825 healthy people (median age, 69.94; interquartile range, 66.39– 75.64). Allele and genotype frequencies, pairwise linkage disequilibrium (LD) and haplotype analysis were calculated.
Results: BMI, waist circumference, systolic blood pressure, diastolic blood pressure, fasting plasma glucose, triglyceride, alanine transaminase, glutamyl transpeptidase and the prevalence of diabetes were found to be higher in the MAFLD individuals comparing to the control ones (P < 0.05). For rs1421085, the C allele frequency was remarkably higher in MAFLD after Bonferroni correction (OR [95% CI] =1.353 [1.095– 1.671]; Pcorr =0.030), and a significantly different genotype result was observed in log-additive model (OR [95% CI] =1.369 [1.108– 1.691]; Pcorr =0.024). For rs8050136, significantly increased A allele frequency was observed in MAFLD (OR [95% CI] =1.371 [1.109– 1.695]; Pcorr =0.024), and A-allele carriers showed increased MAFLD risk (OR [95% CI] =1.393 [1.103– 1.759]; Pcorr =0.030). For rs3751812, the T allele frequency was remarkably higher in MAFLD (OR [95% CI] =1.369 [1.108– 1.691]; Pcorr =0.024), and T-allele carriers demonstrated high MAFLD risk (OR [95% CI] =1.392 [1.103– 1.756]; Pcorr =0.030). For rs9939609, A allele frequency was also remarkably high in MAFLD (OR [95% CI] =1.369 [1.108– 1.691]; Pcorr =0.024), and A-allele carriers were more susceptible to MAFLD (OR [95% CI] =[1.103– 1.756]; Pcorr =0.030). A strong LD was found among rs1421085, rs8050136, rs3751812 and rs9939609 (r2 > 0.8), and individuals with C-A-T-A haplotype had an elevated MAFLD risk (P =0.005).
Conclusion: The case-control study indicated that C variant of rs1421085, A variant of rs8050136, T variant of rs3751812 and A variant of rs9939609 are associated with elevated MAFLD risk in the older Chinese Han population.

Keywords: MAFLD, FTO, polymorphism, genetic association, susceptibility

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