Cellular localization of inhibin mRNA in the bovine ovary by in-situ hybridization.

Cellular localization of inhibin mRNA in the bovine ovary by in-situ hybridization.
复制标题

通过原位杂交对牛卵巢中抑制素 mRNA 进行细胞定位。

DOI:
10.1530/jrf.0.0860391
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发表时间:
1989
期刊:
Journal of reproduction and fertility
影响因子:
--
通讯作者:
D. D. de Kretser
D. D. de Kretser
中科院分区:
--
文献类型:
--
作者:
A. Torney;Y. Hodgson;R. Forage;D. D. de Kretser

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用杂交组织化学方法检测了奶牛卵巢组织切片中抑制素α和βA亚单位的mRNA的存在。使用32P标记的cDNA,与抑制素的牛α或βA亚基或与质粒DNA的对照片段(PBR322)互补。α亚单位mRNA位于直径大于0.36 mm的有腔卵泡颗粒层,而α和βA亚单位mRNA均存在于直径大于0.8 mm的卵泡中。在后一种卵泡中,膜层仅与α亚单位mRNA杂交。在黄体细胞中未发现α或βA亚单位探针的杂交。当组织切片用核糖核酸酶(RNase)处理时,两种探针的杂交都被取消。该质粒未与任何组织切片杂交。本研究表明,α抑制素亚单位的信使核糖核酸存在于颗粒细胞和膜细胞中,而βA抑制素亚单位的信使核糖核酸仅限于颗粒细胞。这些结果为抑制素两个亚基的表达独立调控提供了证据。
Hybridization histochemistry has been used to detect the presence of mRNA for the alpha and beta A subunit of inhibin in tissue sections of the ovary of cows. 32P-labelled cDNAs, complementary to the bovine alpha or beta A subunit of inhibin or to a control segment of plasmid DNA (pBR 322), were used. The alpha subunit mRNA was located in the granulosa layer of antral follicles greater than 0.36 mm in diameter while the alpha and beta A subunit mRNA were both present in follicles of greater than 0.8 mm. In these latter follicles, the thecal layer hybridized with only the alpha subunit mRNA. No hybridization of the alpha or beta A subunit probe was found in the cells of the corpus luteum. Hybridization of both probes was abolished when the tissue sections were pretreated with ribonuclease (RNAse). The plasmid cDNA did not hybridize to any of the tissue sections. This study demonstrates that mRNA for the alpha inhibin subunit can be detected in granulosa and theca cells whereas the beta A inhibin subunit mRNA is restricted to the granulosa cells. These results provide evidence for an independent regulation of expression for the two subunits of inhibin.
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