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Published on: February 3, 2023
MicroRNA-499 Rs3746444 polymorphism and biliary atresia
Yuhua Shan1, Nan Shen2, Longzhi Han1
1Department of Liver Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China.
Background:
Single nucleotide polymorphisms within microRNAs are known to affect the risk in development and prognosis of many diseases. This study was designed to investigate whether polymorphism of microRNA-499 (miR-499, rs3746444 A>G) is associated with risk to biliary atresia (BA).
Methods:
A hospital-based cases-control study was performed on a total of 507 Han Chinese (207 BA cases and 300 ethnically-matched healthy controls without any evidence of liver diseases) so as to analyze the association between miR-499 rs3746444 polymorphism and BA risk as well as liver function remission (LFR) after liver transplantation.
Results:
A significant higher frequency of the rs3746444 G alleles was found in the BA cases than the control group (odd ratio, 1.55, 95% confidence intervals [CIs], 1.15-2.10). This polymorphism was also observed to correlate with some clinic-pathological features of BA cases such as liver inflammatory. Further research found both higher levels of IL-6 (P<0.05) and TNF-α (P<0.05) in removed liver as well as in serum. What is more, the miR-499 rs3746444 polymorphism significantly affected the status of LFR (hazard ratio, 1.37; 95% CI, 1.08-1.83).
Conclusions:
MiR-499 (rs3746444) gene polymorphisms may be genetic determinants for increased risk of BA and prolonged recovery of BA patients after liver transplantation in Han Chinese.
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