The Korean Journal of Physiology and Pharmacology

The Korean Society of Pharmacology (대한약리학회)
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Identification of Differentially Expressed Genes in Bovine Follicular Cystic Ovaries

  • Choe, Chang-Yong (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Cho, Young-Woo (Department of Physiology, Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Kim, Chang-Woon (Department of Obstetrics and Gynecology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine) ;
  • Son, Dong-Soo (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Han, Jae-Hee (Department of Physiology, Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Kang, Da-Won (Department of Physiology, Institute of Health Sciences, Gyeongsang National University School of Medicine)
  • Received : 2010.06.02
  • Accepted : 2010.08.25
  • Published : 2010.10.31
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Abstract

Follicular cystic ovary (FCO) is one of the most frequently diagnosed ovarian diseases and is a major cause of reproductive failure in mammalian species. However, the mechanism by which FCO is induced remains unclear. Genetic alterations which affect the functioning of many kinds of cells and/or tissues could be present in cystic ovaries. In this study, we performed a comparison analysis of gene expression in order to identify new molecules useful in discrimination of bovine FCO with follicular cystic follicles (FCFs). Normal follicles and FCFs were classified based on their sizes (5 to 10 mm and $\geq25mm$). These follicles had granulosa cell layer and theca interna and the hormone $17{\beta}$-estradiol ($E_2$)/ progesterone ($P_4$) ratio in follicles was greater than one. Perifollicular regions including follicles were used for the preparation of RNA or protein. Differentially expressed genes (DEG) that showed greater than a 2-fold change in expression were screened by the annealing control primer (ACP)-based PCR method using $GeneFishing^{TM}$ DEG kits in bovine normal follicles and FCFs. We identified two DEGs in the FCFs: ribosomal protein L15 (RPL15) and microtubule-associated protein 1B (MAP1B) based on BLAST searches of the NCBI GenBank. Consistent with the ACP analysis, semi-quantitative PCR data and Western blot analyses revealed an up-regulation of RPL15 and a down-regulation of MAP1B in FCFs. These results suggest that RPL15 and MAP1B may be involved in the regulation of pathological processes in bovine FCOs and may help to establish a bovine gene data-base for the discrimination of FCOs from normal ovaries.

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References

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