Interaction between mitochondrial NADH dehydrogenase subunit-2 5178 C > A and clinical risk factors on the susceptibility of essential hypertension in Chinese population

Xi Chen†,
Xiang-Yu He†,
Chao Zhu,
Yusong Zhang,
Zongbin Li,
Yuqi Liu,
Yuxiao Zhang,
Tong YinEmail author and
Yang LiEmail author View ORCID ID profile

†Contributed equally

BMC Medical Genetics201920:121

https://doi.org/10.1186/s12881-019-0838-3

Received: 16 January 2019
Accepted: 31 May 2019
Published: 5 July 2019

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Abstract

Background

The mitochondrial genotype 5178 cytosine/adenine (5178 C > A) within the NADH dehydrogenase subunit-2 gene (ND2) was proved to associate with longevity and predispose resistance to adult-onset diseases. This study aimed to confirm the interactive effects between ND 25178 C > A and clinical risk factors on the susceptibility of essential hypertension in Chinese general population.

Materials and Methods

The relationship between the ND2 5178 C > A variation and the risk of hypertension was investigated in 817 hypertensives and 821 matched normotensives. The interactive effects between ND2 5178 C > A and clinical risk factors were evaluated.

Results

The ND2 5178 A allele was more frequent in normotensives than in hypertensives (32.64% vs. 24.24%; adjusted OR: 0.62, 95% CI: 0.49–0.79, P = 1.3 × 10− 4). After stratification, the significant association between ND2 5178 C > A and hypertension was found only in current smokers (OR: 0.44, 95% CI: 0.31–0.62), but not in non-current smokers (p < 0.01 for interaction). Smoking status (OR: 1.51, 95% CI: 1.11–2.06) and high triglycerides (OR: 1.57, 95% CI: 1.10–2.24) were found independently associated with hypertension only in carriers of 5178 C allele but not in carriers of 5178 A allele.

Conclusions

In conclusion, ND2 5178 A allele could confer a lower risk for essential hypertension in Chinese by the interaction with smoking status. The higher risk of hypertension imposed by smoking and high TG may be altered by ND2 5178 A allele.