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Relation of genetic polymorphisms in microRNAs with diastolic and systolic function in type 2 diabetes mellitus

Published:September 12, 2022DOI:https://doi.org/10.1016/j.numecd.2022.09.002

      Highlights

      • MicroRNAs (miRNA) affect the diastolic and systolic function of T2DM.
      • MiR-133a-1 rs8089787 and let-7f rs10877887 associated with cardiac diastolic dysfunction.
      • The impaired diastolic function was reflected as increased LAVI, decreased mean E′ and increased E/E’.
      • The findings may be a promising therapeutic targets for preventing diastolic dysfunction in T2DM subjects.

      Abstract

      Background and aims

      Type 2 diabetes mellitus (T2DM) has high risk of developing cardiac dysfunction, increasing of either cardiovascular death or hospitalization for heart failure. MicroRNAs (miRNA) affect cardiac function of T2DM. The aim of this study was to investigate the relationships between five miRNA single nucleotide polymorphisms (SNP) and diastolic and systolic function of T2DM.

      Methods and results

      Three hundred untreated T2DM subjects were included. Each subject underwent SNP genotyping, conventional echocardiography, tissue doppler imaging, and speckle tracking imaging. The effects of miRNA SNPs on diastolic and systolic function were evaluated. The diastolic function of T2DM subjects with miR-133a-1-rs8089787 wild genotype or let-7f-rs10877887 variant genotype was lower than those with miR-133a-1-rs8089787 variant genotype or let-7f-rs10877887 wild genotype, manifesting as higher left atrial volume index, lower mean E′, and higher E/E’ (P < 0.05). There were no significant effects of miR-133a-2-rs13040413, let-7a-1-rs13293512 and miR-27a-rs895819 on the diastolic function of T2DM subjects (P > 0.05). These five miRNA SNPs had no effect on the systolic function of T2DM subjects (P > 0.05).

      Conclusions

      MiRNA-133a-1-rs8089787 and let-7f-rs10877887 were associated with impaired cardiac diastolic function in T2DM. The findings may be a promising therapeutic targets for preventing diastolic dysfunction in T2DM.

      Keywords

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