Ca2+/Mg2+-Dependent Endonuclease but not Ca2+-Dependent, Mg2+-Dependent or Cation-Independent Endonuclease is Involved in Granulosa Cell Apoptosis of Pig Atretic Follicles
スポンサーリンク
概要
- 論文の詳細を見る
The antral follicles, 4-6 mm in diameter, were dissected from the ovaries of mature pigs, and then granulosa and cumulus cells were isolated from each follicle. In atretic follicles, high activity of neutral Ca2+/Mg2+-dependent endonuclease by which the chromatin DNA is degraded at internucleosomal sites in the cells undergoing apoptosis was noted only in granulosa cells but not in cumulus cells. Low activity of the Ca2+/Mg2+-dependent endonuclease was observed in both types of cells obtained from healthy follicles. Low activities of neutral Ca2+-dependent endonuclease, neutral Mg2+-dependent endonuclease and acidic cation-independent endonuclease were demonstrated in all cases. A good correlation (r=0.892) between the Ca2+/Mg2+-dependent endonuclease activity of granulosa cells and the progesterone/estradiol-17β ratio of follicular fluid in each follicle, which provides an index of follicular atresia in pig ovaries, was found. These results suggest that the Ca2+/Mg2+-dependent endonuclease, and not the Ca2+-dependent endonuclease, the Mg2+-dependent endonuclease or the cation-independent endonuclease, is involved in granulosa cell apoptosis of the atretic antral follicles in pigs.
- 日本繁殖生物学会の論文
著者
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FUKUMOTO Manabu
Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University
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Kimura Yoshihiro
Department Of Cardiology Higashi-osaka City General Hospital
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MANABE Noboru
Department of Animal Science, Faculty of Agriculture, Kyoto University
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Miyamoto Hajime
Department Of Biopharmaceutics School Of Pharmaceutical Sciences Osaka University
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IMAI Yuzuru
Department of Animal Sciences, Kyoto University
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MYOUMOTO Akira
Department of Animal Sciences, Kyoto University
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SUGIMOTO Miki
Department of Animal Sciences, Kyoto University
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Imai Y
Unit Of Anatomy And Cell Biology Department Of Animal Sciences Kyoto University
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OKAMURA YOSHINORI
Department of Obstetrics and Gynecology, Kumamoto University School of Medicine
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