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Epigenetic modification does not determine the time of POU5F1 transcription activation in cloned bovine embryos

  • Epigenetics
  • Published:
Journal of Assisted Reproduction and Genetics Aims and scope Submit manuscript

Abstract

Purpose

To investigate the effect of epigenetic modification on pattern, time and capacity of transcription activation of POU5F1, the key marker of pluripotency, in cloned bovine embryos.

Methods

Bovine fibroblasts were stably transfected with POU5F1 promoter-driven enhanced green fluorescent protein (EGFP). This provided a visible marker to investigate the effect of post-activation treatment of cloned bovine embryos with trichostatin A (TSA) on time and capacity of POU5F1 expression and its subsequent effect on in vitro development of cloned bovine embryos.

Results

Irrespective of TSA treatment, POU5F1 expression was not detected until 8–16 cell stage, but was detected in both inner cell mass and trophectoderm at the blastocyst stage. TSA treatment significantly increased POU5F1 expression, and the yield and quality of cloned embryo development compared to control.

Conclusion

The POU5F1 expression of cloned embryos is strictly controlled by the stage of embryo development and may not be altered by TSA-mediated changes occur in DNA-methylation and histone-acetylation of the genome.

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Acknowledgements

This study was funded by a grant from the Royan Institute of IRI. All the study was carried out in Royan Institute, IRI. The authors would like to thank Mrs. Hosseini for ovum pick up assistance. Authors also sincerely thank Mrs Mansouri for statistical analysis and Mr. Heidari, and Khajeh for preparation the ovaries.

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Correspondence to Halimatun Yaakub or Mohammad Hosein Nasr-Esfahani.

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Authors contribution

Conceived and designed the experiments: SMH, FJ, MHN. Performed the experiments: SMH, MH, MF, FJ, PA, SO, HA, SJ. Analyzed the data: SMH, MHN. Contributed reagents/materials/analysis tools: MHN, HG, AHS, ADV. Wrote the paper: SMH, MHN.

Capsule

Epigenetic modification and cloning efficiency

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Jafari, S., Hosseini, S.M., Hajian, M. et al. Epigenetic modification does not determine the time of POU5F1 transcription activation in cloned bovine embryos. J Assist Reprod Genet 28, 1119–1127 (2011). https://doi.org/10.1007/s10815-011-9638-1

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  • DOI: https://doi.org/10.1007/s10815-011-9638-1

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