Abstract
Background
Blood pressure is influenced by hereditary factors and dietary habits. The objective of this study was to examine the effect of dietary salt consumption and single-nucleotide polymorphisms (SNPs) on blood pressure (BP).
Methods
This was a cross-sectional analysis of 2728 male participants who participated in a health examination in 2009. Average dietary salt consumption was estimated using electronically collected meal purchase data from cafeteria. A multivariate analysis, adjusting for clinically relevant factors, was conducted to examine whether the effect on BP of salt consumption, SNPs, and interaction between salt consumption and each SNP. This study examined the SNPs AGT rs699 (Met235Thr), ADD1 rs4961 (Gly460Trp), NPPA rs5063 (Val32Met), GPX1 rs1050450 (Pro198Leu), and AGTR1 rs5186 (A1166C) in relation to hypertension and salt sensitivity.
Results
BP was not significantly associated with SNPs or salt consumption. The interaction between salt consumption and SNPs with systolic BP showed a significant association in NPPA rs5063 (Val32Met) (P = 0.023) and a marginal trend toward significance in rs4961 and rs1050450 (P = 0.060 and 0.067, respectively).
Conclusion
The effect of salt consumption on BP differed by genotype. Dietary salt consumption and genetic variation can predict a high risk of hypertension.
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Acknowledgments
Toyota Motor Co., Ltd., provided the annual health examination data as well as financial support for this study for the purpose of developing medicine and promoting the health of their employees. The authors also acknowledge Editage for providing editorial and publication supports, Ms. Yoko Kubo for data managing, and Ms. Michiyo Hiraoka for SNP typing.
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Support for this work was provided by the Center of Innovation STREAM Program at the Nagoya University Institute of Innovation for Future Society, the government-led Comprehensive Special Zones for Local Revitalization project, and the Toyota Motor Co., Ltd., for the financial support. The Department of Nephrology, Nagoya University Graduate School of Medicine received research promotion grants from Astellas, Alexion, Otsuka, Kyowa Hakko Kirin, Daiichi Sankyo, Dainippon Sumitomo, Takeda, Torii, Pfizer, and Mochida. The Center for Advanced Medicine and Clinical Research, Nagoya University Hospital received a donation from Eisai Co., Ltd. Department of CKD Initiatives, Nagoya University Graduate School of Medicine received donation from MSD, Dainippon Sumitomo, Kyow Hakko Kirin, Kowa, Chugai, Boehringer Ingelheim, Nihon Medi-Physics Co., Ltd., and research promotion grants from Daiichi Sankyo, Takeda, Torii, Astellas, and Shionogi.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee at which the studies were conducted (IRB approval number 1089-4) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Imaizumi, T., Ando, M., Nakatochi, M. et al. Association of interactions between dietary salt consumption and hypertension-susceptibility genetic polymorphisms with blood pressure among Japanese male workers. Clin Exp Nephrol 21, 457–464 (2017). https://doi.org/10.1007/s10157-016-1315-3
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DOI: https://doi.org/10.1007/s10157-016-1315-3