Upregulation of P-Glycoprotein Activity in Porcine Oocytes and Granulosa Cells During In Vitro Maturation
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- YOKOTA Kazuko
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University
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- HIRANO Takuro
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University
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- URATA Narumi
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University
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- YAMAUCHI Nobuhiko
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University
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- HATTORI Masa-aki
- Department of Animal and Marine Bioresource Sciences, Graduate School of Agriculture, Kyushu University
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Multidrug resistance P-glycoprotein (Pgp), coded by the multidrug resistance type I (MDR1/ABCB1) gene, is an energy-dependent efflux pump and functions in systemic detoxification processes. In the present study, the expression and development of Pgp were evaluated in the porcine oocyte during in vitro maturation to compare with the expression of Pgp in cultured granulosa cells. As revealed by Western blotting using anti-human Pgp antibody, a single band of Pgp with an apparent molecular size of 170 kDa was detected in the germinal vesicle stage oocytes. The surface of GV oocyte was positively labeled by immunostaining. In the second metaphase oocyte after culture in the maturation medium containing porcine follicular fluid and human chorionic gonadotropin, the level of Pgp was increased. The elevation of the oocyte Pgp level was associated with increased activity of rhodamine 6G efflux from the oocyte, and its efflux was suppressed by verapamil, an inhibitor of Pgp. Removal of porcine follicular fluid from the maturation medium resulted in little alteration of the oocyte Pgp level. Expression of Pgp was also elevated in cultured porcine granulosa cells during cell maturation when stimulated with follicle-stimulating hormone or luteinizing hormone for 24-48 h. Collectively, the present results indicate that the transporting activity of P-glycoprotein upregulates in porcine oocytes and granulosa cells during exposure to gonadotropins or prior to ovulation.<br>
収録刊行物
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- Journal of Reproduction and Development
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Journal of Reproduction and Development 57 (3), 322-326, 2011
公益社団法人 日本繁殖生物学会
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詳細情報 詳細情報について
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- CRID
- 1390282681314637184
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- NII論文ID
- 10029050320
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- NII書誌ID
- AA10936678
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- ISSN
- 13484400
- 09168818
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- NDL書誌ID
- 11131821
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可