The role of calcium in the induction of refractoriness to cyclic AMP stimulation by TSH.
The role of calcium in the induction of refractoriness to cyclic AMP stimulation by TSH.
复制标题
钙在诱导 TSH 对环 AMP 刺激不应性中的作用。
DOI:
10.1016/0026-0495(85)90158-1
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发表时间:
1985
期刊:
影响因子:
--
通讯作者:
Field,JB
中科院分区:
文献类型:
--
作者:
Chayoth,R;Arem,R;Yoshimura,Y;Field,JB
An initial exposure of beef thyroid slices to 25 mU/mL thyroid-stimulating hormone (TSH) for two hours induces a diminished stimulation of cyclic adenosine monophosphate (AMP) production upon subsequent readdition of TSH but does not modify the effect of prostaglandin E1(PGE1. Incubation of thyroid slices in calcium-free buffer with or without 2 mmol/L ethylene glycol bis (β-aminoethyl ether)—N,N′ = tetracetic acid (EGTA) prevented desensitization induced by TSH and PGE1, to the subsequent stimulation by TSH and PGE1, respectively, despite the presence of calcium in subsequent incubations. TSH-induced desensitization was not modified by increasing the calcium concentration up to 50 mmol/L in the initial incubation. However, the stimulatory effect of TSH upon cyclic AMP levels was decreased as the calcium concentration in the first incubation was increased. In the presence of at least 1 mmol/L calcium, an initial incubation of thyroid slices with 20 μmol/L ionophore A-23187 decreased the stimulation of cyclic AMP by 25 mU/mL TSH added to the slices for the first time during a subsequent incubation. Under these conditions, A-23187 had no effect on PGE1stimulation of cyclic AMP. These results indicate that calcium may play a role in the TSH-induced, but not PGE1, desensitization of cyclic AMP formation.
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影响因子:
4.8
作者:
Field,JB;Chou,MC;Titus,G;Worden,W
通讯作者:
Worden,W
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Filetti,S;Takai,NA;Rapoport,B
通讯作者:
Rapoport,B
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
J. Boeynaems;M. Waelbroeck;J. Dumont
通讯作者:
J. Dumont
影响因子:
3.9
作者:
Arem,R;Chayoth,R;Shenkenberg,T;Field,JB
通讯作者:
Field,JB
DOI:
--
发表时间:
1980
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
M. Jackowski;R. A. Johnson;J. Exton
通讯作者:
J. Exton