Clinical and Experimental Reproductive Medicine

The Korean Society for Reproductive Medicine (대한생식의학회)
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Characterization of Genes Related to the Cell Size Growth and CCN Family According to the Early Folliculogenesis in the Mouse

쥐의 초기 난포 발달에 관여하는 Cell Size Growth 및 CCN Family 유전자에 관한 연구

  • Kim, Kyeoung-Hwa (Graduate School of Life Science and Biotechnology, Pochon CHA University College of Medicine) ;
  • Park, Chang-Eun (Graduate School of Life Science and Biotechnology, Pochon CHA University College of Medicine) ;
  • Yoon, Se-Jin (Infertility Medical Center, CHA General Hospital) ;
  • Lee, Kyung-Ah (Graduate School of Life Science and Biotechnology, Pochon CHA University College of Medicine)
  • 김경화 (포천중문의과대학교 생명과학전문대학원) ;
  • 박창은 (포천중문의과대학교 생명과학전문대학원) ;
  • 윤세진 (차병원 여성의학연구소) ;
  • 이경아 (포천중문의과대학교 생명과학전문대학원)
  • Published : 2005.09.30
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Abstract

Objectives: Previously, we sought to compile a list of genes expressed during early folliculogenesis by using cDNA microarray to investigate follicular gene expression and changes during primordialprimary follicle transition and development of secondary follicles (Yoon et al., 2005). Among those genes, a group of genes related to the cell size growth was characterized during the ovarian development in the present study. Methods: We determined ovarian expression pattern of six genes related to the cell size growth (cyr61, emp1, fhl1, socs2, wig1 and wisp1) and extended into CCN family (${\underline{c}}onnective$ tissue growth factor/${\underline{c}}ysteine$-rich 61/${\underline{n}}ephroblastoma$-overexpressed), ctgf, nov, wisp2, wisp3, including cyr61 and wisp1 genes. Expression of mRNA and protein according to the ovarian developmental stage was evaluated by in situ hybridization, and/or semiquantitative reverse transcriptase polymerase chain reaction (RT-PCR), and immunohistochemistry, respectively. Results: Among 6 genes related to the cell size growth, cyr61 and wisp1 mRNA was detected only in oocytes in the postnatal day5 mouse ovaries. cyr61 mRNA expression was limited to the nucleolus of oocytes, while wisp1 was expressed in the cytoplasm and nucleolus of oocytes, except nucleus. cyr61 mRNA expression, however, was found in granulosa cells from secondary follicles. The rest 4 genes in the cell size growth group were detected in oocytes, granulosa and theca cells. Cyr61 and Wisp1 proteins were expressed in the oocyte cytoplasm from primordial follicle stage. Especially, Cyr61 protein was detected in pre-granulosa cells, Wisp1 protein was not. By using RT-PCR, we evaluated and decided that Cyr61 protein is produced by their own mRNA in pre-granulosa cells that was not detected by in situ hybridization. cyr61 and wisp1 genes are happen to be the CCN family members. The other members of CCN family were also studied, but their expression was detected in oocytes, granulose and theca cells. Conclusions: We firstly characterized the ovarian expression of genes related to the cell size growth and CCN family according to the early folliculogenesis. Cyr61 protein expression in the pre-granulosa cells is profound in meaning. Further functional analysis for cyr61 in early folliculogenesis is under investigation.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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