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Background:  Corin is a transmembrane serine protease that activates pro-forms of atrial and brain natriuretic peptides. Numerous studies have indicated that corin played an important role in cardiovascular diseases (CVDs). However, there have been few studies about the correlation between single-nucleotide polymorphisms (SNPs) in the 3' untranslated region (3'UTR) of  CORIN  and CVDs. The aims of this study were to investigate the associations of three SNPs (rs3749585, rs4695253, and rs12641823) in the 3'UTR of  CORIN  with CVDs and to find the seed regions of microRNAs (miRNAs) that bind to SNPs of  CORIN .   Methods and Results:  A case–control study ( n  = 3,537) was performed in a Han population of northeastern China. CVDs included essential hypertension (EH), atrial fibrillation (AF), heart failure (HF), and coronary artery disease (CAD). Genotyping was performed using high-resolution melt analysis. In the EH-control study, rs3749585 T  was significantly associated with the risk of EH after adjusting for sex and age in allelic ( p   adj   = 0.049;  OR : 1.113) and dominant ( p   adj   = 0.015,  OR : 1.233) models. Rs4695253 T  was significantly associated with the risk of EH in the recessive model after adjusting for sex and age ( p   adj   = 0.005,  OR : 2.084). Rs3749585 T  was significantly and negatively associated with AF in the dominant and additive models after adjusting for sex, age, EH, HF, T2DM, and CAD (dominant:  p   adj   = 0.009,  OR : 0.762; additive:  p   adj   = 0.048,  OR : 0.873). In the HF-control study and CAD-control study, none of the three SNPs was associated with HF and CAD after adjusting for covariates in any models ( p   adj   > 0.05). The levels of high-density lipoprotein (HDL) in rs4695253 CC+CT  were lower than the levels of HDL in rs4695253 TT  (42.47 ± 10.30 vs. 48.0 ± 10.24 mg/dl,  p   adj   = 0.008). The levels of total cholesterol (TC) in rs4695253 CC+CT  were lower than the levels of TC in rs4695253 TT  (164.01 ± 49.15 vs. 180.81 ± 43.92 mg/dl,  p   adj   = 0.036). Luciferase assay revealed that the relative luciferase activity of rs3749585 CC -transfected cells was significantly decreased by miR-494-3p, in comparison to cells transfected with rs3749585 TT  ( p  < 0.001). A significant decrease in the relative luciferase activity of rs3749585 TT  reporter was observed as compared with rs3749585 CC  reporter in the presence of miR-1323 or miR-548o-3p ( p  = 0.017 and 0.012, respectively).   Conclusions:  We found significant associations between rs3749585 T  and rs4695253 T  and EH, between rs4695253 T  and the levels of TC and HDL, and between rs3749585 T  and AF. Hsa-miR-494-3p may serve as a potential therapeutic target for EH and AF patients in the future.

frontiers in cardiovascular medicine

Single-Nucleotide Polymorphisms in the 3' Untranslated Region of CORIN Associated With Cardiovascular Diseases in a Chinese Han Population: A Case–Control Study