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Molecular Biology Reports

, Volume 40, Issue 8, pp 4747–4757 | Cite as

Aberrant DNA methylation at Igf2–H19 imprinting control region in spermatozoa upon neonatal exposure to bisphenol A and its association with post implantation loss

  • Tanvi Doshi
  • Criselle D’souza
  • Geeta VanageEmail author
Article

Abstract

Bisphenol A (BPA) is an estrogenic compound commonly used in manufacture of various consumer products. Earlier studies from our group have demonstrated that neonatal exposure of male rats to BPA causes decrease in sperm count and motility, increase in post implantation loss, ultimately leading to subfertility during adulthood. One of the factors contributing for post implantation loss is altered methylation pattern of imprinted genes. The present study was undertaken to investigate the molecular effects of neonatal exposure of male rats to BPA (2.4 μg/pup) (F0) on the methylation of H19 imprinting control region (ICR) in resorbed embryo (F1) and compared with spermatozoa of their respective sires (F0). We observed a significant down regulation in the transcript expression of Igf2 and H19 genes in BPA resorbed embryo (F1) as compared to control viable embryo. A significant hypomethylation was observed at the H19 ICR in the spermatozoa as well as in resorbed embryo sired by rats exposed neonatally to BPA. These results indicated that the aberrant methylation at ICR in spermatozoa was inherited by embryo which causes perturbation in the expression of Igf2 and H19, ultimately leading to post implantation loss. This could be one of the possible mechanisms of BPA induced adverse epigenetic effects on male fertility.

Keywords

Bisphenol A DNA methylation Imprinting control region Post implantation loss Neonatal exposure 

Notes

Acknowledgments

This work was supported by the Department of Science and Technology (Grant numbers: 100/IFD/6122/2010–2011). The author would like to acknowledge the Indian Council of Medical Research for fellowship (Grant number: FNO-3/1/2/6/10-RCH) to Ms. Tanvi Doshi. The authors are grateful to Dr. Dighe for his help in primer designing and Dr. A. Maitra for her guidance with DNA sequencing, Mr. Saravanan and Ms. Nanda for technical assistance with DNA sequencing. The author would like to acknowledge the technical and animal experimentation assistance of Mr. S. Bhagat, Mr. D. Tiwari, Mr. S. Kadam, Mr. P. Salunke, Mr. J. Tare and Mr. M. Mali.

Conflict of interest

The authors declare that there is no potential conflict of interest amongst them.

Supplementary material

11033_2013_2571_MOESM1_ESM.xls (31 kb)
Supplementary material 1 (XLS 31 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.National Center for Preclinical Reproductive and Genetic ToxicologyNational Institute for Research in Reproductive Health (ICMR)MumbaiIndia

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