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Ethanol exposure in prenatal and early postnatal induced cardiac injury in rats: involvement of oxidative stress, Hsp70, ERK 1/2, JNK, and apoptosis in a 3-month follow-up study

  • Alireza Shirpoor
  • Reza Gaderi
  • Roya NaderiEmail author
Original Paper

Abstract

Alcohol exposure during pregnancy induces a wide range of structural and functional abnormalities in the fetal heart. However, the underlying mechanism of this phenomenon is not well known. This study was undertaken to elucidate probable mechanisms of myocardial damage induced by prenatal and early postnatal ethanol treatment. Pregnant Wistar rats received ethanol 4.5 g/kg BW once per day from the seventh day of gestation (GD7) throughout lactation. The oxidative stress injury of the myocardium in pups was evaluated by measuring levels of oxidative stress biomarkers. Histopathological examinations and Western blot were performed to evaluate histological features, apoptosis, and molecular alterations in the myocardial tissue of male pups on the postnatal day 21 (PN-21) and postnatal day 90 (PN-90). The results showed that maternal ethanol consumption caused oxidative stress (impaired total antioxidant capacity and malondialdehyde), histological changes, and apoptosis of the myocardium in the pups on PN-21 and PN-90. At the molecular levels, Western blot analysis revealed that ethanol modulated the protein expression of p-ERK1/2, p-JNK, and Hsp70 in the myocardial tissue of the pups after 21 and 90 days of birth compared with the controls. These findings revealed that maternal ethanol intake induced cardiac toxicity in part, mediated by oxidative stress and apoptosis in the pups. A further mechanism study revealed that ethanol enhanced ERK1/2 and JNK phosphorylation and Hsp70 protein expression.

Keywords

Ethanol Offspring ERK1/2 JNK Hsp70 Heart 

Notes

Funding information

The work was supported by a grant from the Urmia University of Medical Science, Urmia, Iran.

Compliance with ethical standards

All animal procedures were performed in accordance with the National Institutes of Health Guidelines for the Care and Use of Laboratory Animals and approved by the Animal Care Committee, the Urmia University of Medical Sciences.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Cell Stress Society International 2019

Authors and Affiliations

  1. 1.Nephrology and Kidney Transplant Research CenterUrmia University of Medical SciencesUrmiaIran
  2. 2.Department of Physiology, Faculty of MedicineUrmia University of Medical SciencesUrmiaIran

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