한국발생생물학회지:발생과생식 (Development and Reproduction)

  • 제16권3호
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  • Pages.195-204
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  • 2012
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  • 2465-9525(pISSN)
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  • 2465-9541(eISSN)
한국발생생물학회 (The Korean Society of Developmental Biology)
권호 표지

Expression of Gas6 Receptors, Tyro3, Axl, and Mertk, in Oocytes and Embryos and Effects of Mertk RNAi on the Oocyte Maturation

  • Kim, Kyeoung-Hwa (Department of Biomedical Science, College of Life Science, CHA University, CHA Research Institute, Fertility Center, CHA General Hospital) ;
  • Lee, Sang-Eun (Department of Biomedical Science, College of Life Science, CHA University, CHA Research Institute, Fertility Center, CHA General Hospital) ;
  • Lee, Kyung-Ah (Department of Biomedical Science, College of Life Science, CHA University, CHA Research Institute, Fertility Center, CHA General Hospital)
  • 투고 : 2012.08.27
  • 심사 : 2012.09.17
  • 발행 : 2012.09.30
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초록

Recently, we reported growth arrest-specific gene 6 (Gas6) as a new maternal effect gene (MEG), that expressed in the oocytes but functioned principally during embryogenesis. Gas6 RNAi-treated oocytes developed to metaphase II (MII) stage but they have affected M-phase promoting factor (MPF) activity and incurred abnormal pronuclear (PN) formation during fertilization. Gas6 is a ligand of TAM family members (Tyro3, Axl and Mertk) of receptor tyrosine kinase (RTK). Purpose of the present study was to evaluate the expression of Tyro3, Axl and Mertk transcripts in oocytes and early embryos. Expression of Gas6 and Mertk mRNA was detectable in oocytes and follicular cells, while Tyro3 and Axl mRNA was expressed only in follicular cells. Expression of Mertk mRNA was relatively constant during oocytes maturation and embryogenesis, but the other receptors, Tyro3 and Axl, were not expressed in oocytes and PN stage of embryos at all. Knockdown of Mertk mRNA and protein by using sequence-specific Mertk double strand RNA (dsRNA) did not affect oocytes maturation. In this case, however, contrary to the ligand Gas6 RNA interference (RNAi), MPF activity had not been changed by Mertk RNAi. Therefore, we concluded that the Gas6-Mertk signaling is not directly related to the oocyte maturation. It is still required to study further regarding the function of Mertk as the receptor of Gas6 during preimplantational early embryogenesis.

키워드

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