题名

Characterization of a Stable Steroidogenic Caprine Luteal Cell Line Transformed by a Temperature-Sensitive Simian Virus 40

作者

Chih-Hsien Chiu;Ing-Chen Guo;Jen-Hsou Lin;Leang-Shin Wu

关键词

caprine ; luteal cells ; cell line ; steroidogenesis ; simian virus

期刊名称

The Chinese Journal of Physiology

卷期/出版年月

51卷6期(2008 / 12 / 01)

页次

369 - 375

内容语文

英文

英文摘要

A caprine luteal cell line (tsCLC-D) that synthesizes progesterone (P4) was established following by transformation with a temperature-sensitive A209 (tsA209) mutant of simian virus 40 (SV40). The transformed cells have temperature-sensitive for morphology, cell propagation and progesterone steroidogenesis. At the permissive temperature of 34℃, these cells were spindle-shaped and grew with a similar rapidity as tumor cells. However, at the nonpermissive temperature of 40℃, the cells have exhibited a round shape and ceased to proliferate because the gene for maintenance of transformation was not expressed. The tsCLC-D cell line responds to 8-Br-cyclic AMP, 22-hydroxycholesterol and pregnenolone treatment with an increase in progesterone biosynthesis. This cell line still express StAR protein, 3β-HSD and P450scc enzyme of three kinds of steroidogenic protein and enzymes, this characteristic is similar to normal luteal cell. However, the addition of any doses oLH did not increase progesterone secretion. We speculate that tsCLC-D might lose the responsiveness to gonadotropins during the immortalization process, while retaining steroidogenic enzyme activity and progesterone production. To our knowledge, this is the first report of a stable cell line derived from corpus luteum of ruminant. The tsCLC-D retains steroidogenic capacity, which will make this cell line useful for the studies of regulation of steroidogenesis.

主题分类 醫藥衛生 > 基礎醫學
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