Hormonal regulation of copper-zinc superoxide dismutase and manganese superoxide dismutase messenger ribonucleic acid in the rat corpus luteum: Induction by prolactin and placental lactogens

Norihiro Sugino, Mitsuko Hirosawa-Takamori, Liping Zhong, Carlos M. Telleria, Kunio Shiota, Geula Gibori*

*この研究の対応する著者

研究成果: Article査読

58 被引用数 (Scopus)

抄録

The corpus luteum expresses two enzymes that scavenge superoxide radicals and protect the cells from their toxic activities: cytosolic copper, zinc-superoxide dismutase (Cu,Zn-SOD) and mitochondrial manganese-SOD (Mn- SOD). The present study was undertaken to investigate whether the mRNA expression of each of these enzymes is regulated by luteotropic hormones. Cu,Zn-SOD and Mn-SOD mRNA levels were determined by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR). We first examined the effects of prolactin (PRL) on Cu,Zn-SOD and Mn-SOD mRNA expression in the corpus luteum. Hypophysectomy of Day 3 pregnant rats caused a sharp decline in both Cu,Zn-SOD and Mn-SOD mRNA levels, which was completely reversed by PRL administration. To further examine the effects of PRL and rat placental lactogen (rPL) on the expression of these enzymes, either primary luteinized granulosa cells or temperature-sensitive simian virus-40 transformed luteal cells (GG-CL) were cultured with different doses of PRL or rPL. These hormones induced a remarkable increase in Cu,Zn-SOD and Mn-SOD mRNA levels in both primary luteinized granulosa cells and GG-CL cells. Interestingly, whereas PRL up-regulated the expression of the SOD in luteal cells, other luteotropic hormones such as estradiol and dexamethasone inhibited both SOD mRNA expression while progesterone had no effect. In conclusion, PR/and PRL- like hormones induce a protective ability against toxic oxygen radicals by stimulating the expression of SODs, a phenomenon that may play an important role in maintaining luteal cell integrity and steroidogenic capacity.

本文言語English
ページ(範囲)599-605
ページ数7
ジャーナルBiology of Reproduction
59
3
出版ステータスPublished - 1998 9
外部発表はい

ASJC Scopus subject areas

  • 細胞生物学
  • 発生生物学
  • 胎生学

フィンガープリント

「Hormonal regulation of copper-zinc superoxide dismutase and manganese superoxide dismutase messenger ribonucleic acid in the rat corpus luteum: Induction by prolactin and placental lactogens」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル