Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 322-326 |
| Number of pages | 5 |
| Journal | Journal of Reproduction and Development |
| Volume | 57 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 1 2011 |
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All Science Journal Classification (ASJC) codes
- Animal Science and Zoology
Cite this
Upregulation of P-glycoprotein activity in porcine oocytes and granulosa cells during in vitro maturation. / Yokota, Kazuko; Hirano, Takuro; Urata, Narumi; Yamauchi, Nobuhiko; Hattori, Masa Aki.
In: Journal of Reproduction and Development, Vol. 57, No. 3, 01.06.2011, p. 322-326.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Upregulation of P-glycoprotein activity in porcine oocytes and granulosa cells during in vitro maturation
AU - Yokota, Kazuko
AU - Hirano, Takuro
AU - Urata, Narumi
AU - Yamauchi, Nobuhiko
AU - Hattori, Masa Aki
PY - 2011/6/1
Y1 - 2011/6/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=79960145797&partnerID=8YFLogxK
U2 - 10.1262/jrd.10-137M
DO - 10.1262/jrd.10-137M
M3 - Article
C2 - 21289467
AN - SCOPUS:79960145797
VL - 57
SP - 322
EP - 326
JO - Journal of Reproduction and Development
JF - Journal of Reproduction and Development
SN - 0916-8818
IS - 3
ER -