KCNQ1 variants associate with hypertension in type 2 diabetes and affect smooth muscle contractility in vitro

Kuo Chin Huang, Te Mao Li, Xiang Liu, Jin Hua Chen, Wen Kuei Chien, Yi Tzone Shiao, Hsinyi Tsang, Ting Hsu Lin, Chiu Chu Liao, Shao Mei Huang, Ju Pi Li, Cheng Wen Lin, Jung Chun Lin, Chih Chien Lin, Chih Ho Lai, Chi Fung Cheng, Wen Miin Liang, Chien Hui Hung, Ching Chu Chen, Ying Ju LinFuu Jen Tsai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


KCNQ1 encodes a potassium voltage-gated channel and represents a susceptibility locus for type 2 diabetes mellitus (T2DM). Here, we explored the association between KCNQ1 polymorphisms and hypertension risk in individuals with T2DM, as well as the role of KCNQ1 in vascular smooth muscle cell contraction in vitro. To investigate the relationship between KCNQ1 and the risk of developing hypertension in patients with T2DM, we divided the T2DM cohort into hypertension (n=452) and non-hypertension (n=541) groups. The Mann-Whitney U test, chi-square test, and multivariate regression analyses were used to assess the clinical characteristics and genotypic frequencies. In vitro studies utilized the rat aortic smooth muscle A10 cell line. Patients in the hypertension group were significantly older at the time of enrollment and had higher levels of body mass index, waist-to-hip ratio, and triglyceride than those in the non-hypertension group. The KCNQ1 rs3864884 and rs12576239 genetic variants were associated with hypertension in T2DM. KCNQ1 expression was lower in the individuals with the CC versus the CT and TT genotypes. Smooth muscle cell contractility was inhibited by treatment with a KCNQ1 inhibitor. These results suggest that KCNQ1 might be associated with hypertension in individuals with T2DM.

Original languageEnglish
Pages (from-to)3309-3316
Number of pages8
JournalJournal of Cellular Physiology
Issue number12
Publication statusPublished - Dec 2017


  • KCNQ1
  • genetic variants
  • hypertension
  • muscle contractility
  • type 2 diabetes

ASJC Scopus subject areas

  • Physiology
  • Clinical Biochemistry
  • Cell Biology


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