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Maternal High-Salt Intake During Pregnancy Reprogrammed Renin–Angiotensin System-Mediated Cardiomyocyte Apoptosis in the Adult Offspring Heart

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Abstract

Aims

Excess salt intake during pregnancy may alter fetal organ structures and functions leading to increased risks in the development of cardiovascular diseases in later life. The present study determined whether and how the prenatal high-salt (HS) diets affect renin–angiotensin system (RAS) that may mediate cardiac cell death.

Methods and Results

Angiotensin II receptors, AT1 and AT2, protein expression was increased in the myocardium of the offspring exposed to prenatal HS; apoptotic cells appeared in the myocardium of the adult offspring. Mitochondrion was isolated in cell experiments, and the data showed cardiomyocyte apoptosis requiring cytochrome C release. Pretreating H9C2 cells with AT2 agonist CGP42112A induced cell apoptosis in DNA fragments and activated caspase 3. CGP42112A increased mitochondrion cytochrome C release and apoptosis in the cells.

Conclusion

Both in vitro and in vivo study demonstrated that cardiomyocyte apoptosis was related to AT2 activation. Prenatal HS diets may reprogram RAS that mediates apoptosis in the offspring myocardium, and AT2 may contribute to cardiomyocyte apoptosis via the cytochrome C release pathway.

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Authors and Affiliations

  1. Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou, China

    Juanxiu Lv PhD, Peiwen Zhang MS, Yujuan Zhang PhD, Hanzhe Kuang, Li Cao PhD, Conglong Wu, Lin Jiang, Dawei Li, Caiping Mao PhD & Zhice Xu PhD

  2. Center for Perinatal Biology, Loma Linda University, CA, USA

    Zhice Xu PhD

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  1. Juanxiu Lv PhD
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  2. Peiwen Zhang MS
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Correspondence to Zhice Xu PhD.

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Lv, J., Zhang, P., Zhang, Y. et al. Maternal High-Salt Intake During Pregnancy Reprogrammed Renin–Angiotensin System-Mediated Cardiomyocyte Apoptosis in the Adult Offspring Heart. Reprod. Sci. 21, 52–62 (2014). https://doi.org/10.1177/1933719113488447

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