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Volume 58, issue 1
Arch. Anim. Breed., 58, 171-175, 2015
https://doi.org/10.5194/aab-58-171-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 58, 171-175, 2015
https://doi.org/10.5194/aab-58-171-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 Apr 2015

28 Apr 2015

Quantitative analysis of RNA abondance for CTCF during reprogramming of bovine embryo from oocyte to blastocyst

M. Amiri Roudbar1, H. Dehghani2, M. Tahmoorespur1, A. Zahmatkesh3, H. Adeldust4, S. Ansari Majd5, and M. Daliri Joupari5 M. Amiri Roudbar et al.
  • 1Department of Animal Sciences, College of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
  • 2Department of Basic Science, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
  • 3Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
  • 4Department of Animal Science, College of Agriculture, University of Tehran, Tehran, Iran
  • 5Department of Animal and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran

Abstract. CTCF is a highly conserved protein among eukaryotes and it is involved in many of regulatory functions including, transcriptional repression and activation, chromatin insulation, imprinting, X chromosome inactivation, higher-order chromatin organization, and alternative splicing. Studies performed on mouse embryos indicate that CTCF can be a maternal-effect gene, and is essential for normal development of embryos. CTCF can be used as a molecular effector for the proper epigenetic establishment of embryonic development. The aim of this study was to determine changes in transcript levels of the CTCF gene in bovine preimplantation embryos. RNA was extracted from immature and mature oocytes and embryos at various developmental stages (two-cell, four-cell, eight-cell, and blastocysts). Results showed that the amounts of CTCF transcripts decreased in mature oocyte in comparison with immature oocytes, but this change was not significant. In addition, the amount of CTCF transcript in embryos at two-cell, four-cell, eight-cell, and blastocyst stages significantly increased in comparison with immature oocytes. These data show that CTCF expression in bovine embryo begins at minor embryonic genome activation.

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