The role of growth hormone in α 2u globulin synthesis: A reexamination

The role of growth hormone in α 2u globulin synthesis: A reexamination
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生长激素在 α2u 球蛋白合成中的作用:重新审视

DOI:
10.1016/0092-8674(82)90388-9
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发表时间:
1982
期刊:
影响因子:
64.5
通讯作者:
P. Feigelson
P. Feigelson
中科院分区:
生物学1区
文献类型:
--
作者:
K. Lynch;K. Dolan;H. Nakhasi;R. Unterman;P. Feigelson

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成年雄性大鼠的垂体切除术消除了(y2”球蛋白的合成;通过每天服用雄激素、甲状腺激素、糖皮质激素和生长激素12天可以完全恢复合成。之前有报道称,不需要生长激素来维持(ypu球蛋白mRNA水平),并且生长激素仅在平移作用。我们使用克隆的CQ重新检查了生长激素在a2u球蛋白合成中的作用。”通过杂交和无细胞翻译测量 (Ye. 球蛋白 mRNA 水平),以及通过体内脉冲标记合成 (Ye. 球蛋白合成),表明需要生长激素来维持 LYE” 球蛋白及其 mRNA 的完整、稳态肝脏水平。此外,在没有生长激素的情况下积累的少量肝脏 CX~” 球蛋白 mRNA 可以在体内有效翻译。因此,我们现在没有发现任何证据表明我们还发现,青春期前垂体切除的大鼠对多激素恢复治疗的反应仅为成年垂体切除大鼠中观察到的 ypu 球蛋白 mRNA 水平的 10%。这一发现表明,青春期期间需要一些未识别的垂体因子来增强正常的 apU 球蛋白基因表达。
Hypophysectomy of adult male rats abolishes (y2” globulin synthesis; synthesis can be fully restored by daily administration of androgen, thyroid hormone, glucocorticoid and growth hormone for 12 days. It has been previously reported that growth hormone is not required to maintain (ypu globulin mRNA levels, and that growth hormone functions only translatlonally. We have reexamined the role of growth hormone in a2u globulin synthesis using a cloned CQ.” globulin cDNA probe. Measurement of (Ye. globulin mRNA levels by hybridization and cellfree translation, and of (Ye. globulin synthesis by pulse-labeling in vivo, demonstrates that growth hormone is required to maintain full, steady state hepatic levels of both LYE” globulin and its mRNA. Furthermore, the small amount of hepatic CX~” globulin mRNA that accumulates in the absence of growth hormone is efficiently translated in vivo. Thus we now find no evidence for growth-hormonemediated translational control. We have also found that rats hypophysectomized prepubescently respond to the multihormonal restoration therapy to only 10% of the (ypu globulin mRNA levels observed in rats hypophysectomized as adults. This finding suggests that some unidentified pituitary factor (s) is required during puberty to potentiate normal apU globulin gene expression.
几种 α2u-球蛋白 cDNA 的克隆和序列。
DOI: 10.1073/pnas.78.6.3478
发表时间: 1981
影响因子: 11.1
作者:
Unterman,RD;Lynch,KR;Nakhasi,HL;Dolan,KP;Hamilton,JW;Cohn,DV;Feigelson,P
通讯作者: Feigelson,P
胰岛素在糖尿病大鼠 α2u-球蛋白肝脏信使 RNA 调节中的作用。
DOI: --
发表时间: 1980
期刊: The Journal of biological chemistry
影响因子: --
作者:
Roy,AK;Chatterjee,B;Prasad,MS;Unakar,NJ
通讯作者: Unakar,NJ