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Intra-uterine growth restriction is associated with increased apoptosis and altered expression of proteins in the p53 pathway in villous trophoblast

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Abstract

Intrauterine growth restriction (IUGR) affects 3–8% of pregnancies and is associated with altered cell turnover in the villous trophoblast, an essential functional cell type of the human placenta. The intrinsic pathway of apoptosis, particularly p53, is important in regulating placental cell turnover in response to damage. We hypothesised that expression of proteins in the p53 pathway in placental tissue would be altered in IUGR. Expression of constituents of the p53 pathway was assessed using real-time PCR, Western blotting and immunohistochemistry. p53 mRNA and protein expression was increased in IUGR, which localised to the syncytiotrophoblast. Similar changes were noted in p21 and Bax expression. There was no change in the expression of Mdm2, Bak and Bcl-2. The association between altered trophoblast cell turnover in IUGR and increased p53 expression is reminiscent of that following exposure to hypoxia. These observations provide further insight into the potential pathogenesis of IUGR. Further research is required to elicit the role and interactions of p53 and its place in the pathogenesis of IUGR.

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Acknowledgments

This work was financially supported by Tommy’s—The Baby Charity, The Peel Medical Research Trust and The Castang Foundation. We would like to thank Ms Jemma Corcoran for her technical assistance.

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Authors and Affiliations

  1. Maternal and Fetal Health Research Group, St Mary’s Hospital, University of Manchester, Hathersage Road, Manchester, M13 0JH, UK

    Alexander E. P. Heazell, Andrew N. Sharp, Philip N. Baker & Ian P. Crocker

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  1. Alexander E. P. Heazell
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  2. Andrew N. Sharp
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  3. Philip N. Baker
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  4. Ian P. Crocker
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Correspondence to Alexander E. P. Heazell.

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Heazell, A.E.P., Sharp, A.N., Baker, P.N. et al. Intra-uterine growth restriction is associated with increased apoptosis and altered expression of proteins in the p53 pathway in villous trophoblast. Apoptosis 16, 135–144 (2011). https://doi.org/10.1007/s10495-010-0551-3

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  • DOI: https://doi.org/10.1007/s10495-010-0551-3

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