Zhengmei Fang1, Lijun Zhu1, Yuelong Jin1, Yan Chen1, Weiwei Chang1, Yingshui Yao1,2. 1. Department of Epidemiology, School of Public Health, and Institute of Chronic Disease Prevention and Control, Wannan Medical College, Wuhu, China. 2. Anhui College of Traditional Chinese Medicine, Wuhu, China.
Abstract
BACKGROUND: Previous studies have reported that disturbance of endogenous circadian rhythms enhances the chance of hypertension and suggested that circadian clock genes could have a crucial function in the onset of the disease. This case-control study was aimed to investigate the association of the mRNA expression of aryl hydrocarbon receptor nuclear translocator like (Arntl), clock circadian regulator (Clock), and period circadian regulators 1 and 2 (Per1 and Per2) with hypertension and blood pressure levels. METHODS: A total of 172 subjects were recruited in this study, including 86 hypertension and 86 nonhypertension controls. The mRNA expression levels in peripheral blood mononuclear cells were determined by real-time quantitative polymerase chain reaction. The differences in Arntl, Clock, Per1, and Per2 mRNA expression were compared between the 2 groups, and the relationship between mRNA expression and cardiometabolic risk profiles was also assessed. RESULTS: We found that the mRNA expression of Arntl was downregulated in the hypertension cases compared with controls in women (1.10 [0.66, 1.71] vs. 1.30 [0.99, 2.06], p = 0.031). There was a significant negative correlation between the Arntl mRNA expression and SBP (r = -0.301, p = 0.004) and DBP (r = -0.222, p = 0.034) in women. In men, a negative correlation between the Per1 mRNA expression and SBP (r = -0.247, p = 0.026) was found. CONCLUSIONS: The Arntl mRNA expression may play an important role in progression of hypertension in women.
BACKGROUND: Previous studies have reported that disturbance of endogenous circadian rhythms enhances the chance of hypertension and suggested that circadian clock genes could have a crucial function in the onset of the disease. This case-control study was aimed to investigate the association of the mRNA expression of aryl hydrocarbon receptor nuclear translocator like (Arntl), clock circadian regulator (Clock), and period circadian regulators 1 and 2 (Per1 and Per2) with hypertension and blood pressure levels. METHODS: A total of 172 subjects were recruited in this study, including 86 hypertension and 86 nonhypertension controls. The mRNA expression levels in peripheral blood mononuclear cells were determined by real-time quantitative polymerase chain reaction. The differences in Arntl, Clock, Per1, and Per2 mRNA expression were compared between the 2 groups, and the relationship between mRNA expression and cardiometabolic risk profiles was also assessed. RESULTS: We found that the mRNA expression of Arntl was downregulated in the hypertension cases compared with controls in women (1.10 [0.66, 1.71] vs. 1.30 [0.99, 2.06], p = 0.031). There was a significant negative correlation between the Arntl mRNA expression and SBP (r = -0.301, p = 0.004) and DBP (r = -0.222, p = 0.034) in women. In men, a negative correlation between the Per1 mRNA expression and SBP (r = -0.247, p = 0.026) was found. CONCLUSIONS: The Arntl mRNA expression may play an important role in progression of hypertension in women.
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