ブタ卵胞閉鎖にともなうコネキシン43の発現と局在の推移
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概要
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Gap junctions contain channels that connect neighboring cells by allowing the movement of molecules smaller than 1,200 Da. They are formed by connexins and may play a crucial role in the regulation of apoptotic cell death. To determine the role of connexin 43 (Cx43), which is dominantly expressed in granulosa cells, in the regulation of granulosa cell apoptosis during follicular atresia, we examined the changes in the expression and localization of Cx43 mRNA and protein in granulosa cells during atresia using the quantitative real-time revese transcription-polymerase chain reaction, in situ hybridization, Western blot, and immunohistochemistry. Stages of follicular atresia were assessed based on histochemical terminal deoxynucleotidyl transferase-mediated biotinylated deoxyuridine triphosphate nick end-labeling (TUNEL) and/or the ratio of progesterone and 17β-estradiol levels in follicular fluid measured by radioimmunoassay. Cx43 mRNA was detected in granulosa cells of secondary follicles and of healthy, early and progressed atretic tertiary follicles, but not in those of primordial or primary follicles. Both phosphorylated/activated and non-phosphorylated/native Cx43 proteins were detected in granulosa cells of secondary and tertiary follicles, but not in those of primordial or primary follicles. Moreover, in tertiary follicles, these Cx43 proteins were expressed most strongly in granulosa cells of healthy follicles, but only trace levels were noted in cells of early atretic and progressed atretic follicles, an indication that the expression levels of Cx43 protein decrease during follicular atresia. These findings indicate that Cx43 is involved in the apoptosis of granulosa cells during atresia in porcine ovaries.
著者
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井上 直子
京都大学農学研究科応用生物科学専攻生体機構学
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MANABE Noboru
Research Unit of Animal Life Sciences, Animal Resource Science Centre, The University of Tokyo
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Inoue Naoko
Laboratory Of Animal Morphology And Function Graduate School Of Bioagricultural Sciences Nagoya Univ
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松田 二子
東京大学大学院農学生命科学研究科・動物育種繁殖学研究室
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松田-峯畑 二子
Research Unit for Animal Life Sciences, Animal Resource Science Center, The University of Tokyo
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MAEDA Akihisa
Research Unit for Animal Life Sciences, Animal Resource Science Center, The University of Tokyo
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井上 直子
Laboratory of Animal Morphology and Function, Graduate School of Bioagricultural Sciences, Nagoya Un
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GOTO Yasufumi
Research Unit for Animal Life Sciences, Animal Resource Science Center, Graduate School of Agricultu
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CHENG Yuan
Research Unit for Animal Life Sciences, Animal Resource Science Center, Graduate School of Agricultu
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程 園
Research Unit for Animal Life Sciences, Animal Resource Science Center, Graduate School of Agricultu
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Matsuda-Minehata Fuko
Research Unit for Animal Life Sciences, Animal Resource Science Center, The University of Tokyo
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Manabe Noboru
Research Center For Food Safety Graduate School Of Agricultural And Life Sciences The University Of
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Maeda Akihisa
Research Unit For Animal Life Sciences Animal Resource Science Center Graduate School Of Agricultura
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Goto Yasufumi
Research Unit For Animal Life Sciences Animal Resource Science Center Graduate School Of Agricultura
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Matsuda-minehata Fuko
Research Unit For Animal Life Sciences Animal Resource Science Center Graduate School Of Agricultura
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Cheng Yuan
Research Unit For Animal Life Sciences Animal Resource Science Center Graduate School Of Agricultura
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