Porcine granulosa cell desensitization: prolonged FSH-responsive cAMP production in vitro.
Porcine granulosa cell desensitization: prolonged FSH-responsive cAMP production in vitro.
复制标题
猪颗粒细胞脱敏:体外延长 FSH 反应性 cAMP 产生。
DOI:
10.1152/ajpendo.1983.244.5.e435
复制
发表时间:
1983
期刊:
影响因子:
--
通讯作者:
Fisher,AE
中科院分区:
文献类型:
--
作者:
LaBarbera,AR;Fisher,AE
Granulosa cells from small (1-2 mm) follicles of porcine ovaries produced cAMP in response to follicle-stimulating hormone (FSH); they produced little cAMP in response to human chorionic gonadotropin (hCG) or to cholera toxin. Production, estimated by quantification of total cAMP (medium + cells) by radioimmunoassay, appeared to be episodic in the absence or presence of the phosphodiesterase inhibitor 1-methyl-3-isobutylxanthine (MIX) and continued for at least 20 h. Results of dual incubation experiments with thorough washing of cells between incubations indicated that cells remained responsive to FSH, to hCG, and to cholera toxin after prior exposure to homologous stimulator. Preincubation of cells for 3 h in the absence of stimulator enhanced FSH responsiveness. In experiments with heterologous stimulators in two incubations, first, preincubation with FSH enhanced subsequent hCG and cholera toxin responsiveness; and second, preincubation with hCG or cholera toxin did not affect FSH responsiveness. Desensitization of FSH-activated adenylate cyclase was never greater than 35%; the degree of attenuation was dependent on FSH concentration and duration of exposure to FSH. Cells perifused with medium containing MIX and a maximally effective concentration of FSH for 5 h released cAMP continuously. In summary, the results indicated that porcine granulosa cells do not become unresponsive to FSH after prolonged exposure to FSH in vitro.
登录
查看更多内容
影响因子:
4.8
作者:
LaBarbera,AR;Bergert,ER;Ryan,RJ
通讯作者:
Ryan,RJ
影响因子:
4
作者:
S. Lamprecht;U. Zor,;A. Tsafriri;H. R. Lindner
通讯作者:
H. R. Lindner
影响因子:
4.8
作者:
R. Whitley;H. Keutmann;R. Ryan
通讯作者:
R. Ryan
DOI:
--
发表时间:
1980
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
A. Nimrod;S. Lamprecht
通讯作者:
S. Lamprecht
DOI:
--
发表时间:
1973
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
J. M. Marsh;T. Mills;W. LeMaire
通讯作者:
W. LeMaire