Cyclic adenosine monophosphate and phorbol ester, like gonadotropin-releasing hormone, stimulate the biosynthesis of luteinizing hormone polypeptide chains in a nonadditive manner.

Cyclic adenosine monophosphate and phorbol ester, like gonadotropin-releasing hormone, stimulate the biosynthesis of luteinizing hormone polypeptide chains in a nonadditive manner.
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环磷酸腺苷和佛波酯,如促性腺激素释放激素,以非加和方式刺激黄体生成素多肽链的生物合成。

DOI:
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发表时间:
1989
影响因子:
--
通讯作者:
R. Counis
R. Counis
中科院分区:
医学2区
文献类型:
--
作者:
A. Starzec;M. Jutisz;R. Counis

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我们之前报道过 GnRH 刺激 LH 的 α 和 β 多肽链的合成。在本研究中,为了研究 GnRH 调节 LH 亚基合成的机制,我们使用在 [35S] 蛋氨酸存在下孵育的原代培养垂体前叶细胞,探讨了 cAMP 和佛波酯 [12-O-十四烷酰佛波醇 13-乙酸酯 (TPA)] 的作用。对从细胞和含有特异性抗血清的培养基中免疫提取的标记材料进行十二烷基硫酸钠-聚丙烯酰胺凝胶电泳后,测量掺入α和LHβ免疫相关多肽中的放射性。 cAMP 类似物 8-Br-cAMP(浓度 0.25-2 mM)、霍乱毒素(6-60 nM)和毛喉素(10-100 microM)与 GnRH 一样,诱导 [35S] 蛋氨酸掺入 α 和 LH β 亚基的增加。另一方面,TPA (50-100 nM) 也增强了 LH 亚基的合成。在不同组合的 GnRH、8-Br-cAMP 和 TPA 存在下孵育 5 小时后,未观察到累积效应。这些结果表明,细胞内 cAMP 和 TPA 是 α 和 LH β 多肽链合成的有效激活剂,表明 cAMP 以及二酰基甘油可能充当 GnRH 对 LH 亚基合成的影响的细胞内介质。
We have previously reported that GnRH stimulates the synthesis of both the alpha- and beta-polypeptide chains of LH. In the present study, in order to investigate the mechanisms involved in the GnRH regulation of LH subunit synthesis, we have explored the effects of cAMP and a phorbol ester [12-O-tetradecanoyl phorbol 13-acetate (TPA)] using anterior pituitary cells in primary culture incubated in the presence of [35S]methionine. The radioactivity incorporated into alpha and LH beta immunologically related polypeptides was measured after sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the labeled material immunoextracted from cells and media with specific antisera. The cAMP analog 8-Br-cAMP (at concentrations 0.25-2 mM), the cholera toxin (6-60 nM), and forskolin (10-100 microM) induced, like GnRH, an increase in the [35S]methionine incorporation into alpha- and LH beta-subunits. On the other hand, TPA (50-100 nM) also enhanced the synthesis of LH subunits. After a 5-h incubation in the presence of GnRH, 8-Br-cAMP, and TPA in different combinations, no cumulative effect was observed. These results demonstrate that intracellular cAMP and TPA are potent activators of both alpha- and LH beta-polypeptide chain synthesis, suggesting that cAMP as well as diacylglycerols may act as intracellular mediators of the GnRH effect on LH subunit synthesis.
促性腺激素释放激素刺激纯化促性腺激素细胞培养物中磷酸肌醇和二酰甘油积累的质量变化。
DOI: 10.1210/endo-118-3-1148
发表时间: 1986
期刊: Endocrinology
影响因子: 4.8
作者:
Andrews,WV;Conn,PM
通讯作者: Conn,PM
促性腺激素 α 基因包含多个蛋白质结合结构域,这些结构域相互作用以调节基础转录和 cAMP 响应转录。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Jameson,JL;Jaffe,RC;Deutsch,PJ;Albanese,C;Habener,JF
通讯作者: Habener,JF
DOI: 10.1152/ajpendo.1987.253.3.e290
发表时间: 1987-09
期刊: The American journal of physiology
影响因子: --
作者:
G. A. Bourne;D. M. Baldwin
通讯作者: G. A. Bourne;D. M. Baldwin
佛波酯增强垂体细胞系中腺苷酸环化酶的基础活性和刺激性腺苷酸环化酶活性。
DOI: 10.1016/0006-291x(86)90973-3
发表时间: 1986
影响因子: 3.1
作者:
Summers,ST;Cronin,MJ
通讯作者: Cronin,MJ
DOI: --
发表时间: 1987
期刊: The Journal of biological chemistry
影响因子: --
作者:
McArdle,CA;Huckle,WR;Conn,PM
通讯作者: Conn,PM