ミュレリアン抑制物質は,哺乳類の性発達の過程で機能する.
R R Behringer1, M J Finegold, R L Cate
1Department of Molecular Genetics, University of Texas, M. D. Anderson Cancer Center, Houston 77030.
Cell
|November 4, 1994
まとめ
男性マウスのムレリアン抑制物質 (MIS) 欠乏症は,女性器官の発達により不妊症を引き起こした. また,MISは丸のレイディグ細胞増殖を調節し,男性の性発達に影響を及ぼしているようです.
科学分野:
- 発達生物学 発達生物学について
- 生殖生物学 生殖生物学
- 遺伝学 遺伝学とは
背景:
- ミュレリアン抑制物質 (MIS) は哺乳類の性発達において重要な役割を果たします.
- MISの機能を理解することは,生殖器形成の遺伝的およびホルモン調節を解読する鍵です.
研究 の 目的:
- 哺乳類の性発達とレイディグ細胞増殖におけるMISの役割を調査する.
- 男性の生殖能力のために推定される女性の生殖管を切除する必要性を明らかにする.
主な方法:
- MIS欠乏したマウスの生成.
- testicular feminization (Tfm) 変異をMIS変異アレルと組み合わせて利用し,ダブル変異を生成する.
- 遺伝子組み換えマウスの生殖器官と丸のフェノタイプ分析.
主要な成果:
- MIS欠乏症の雄は女性の生殖器官を発達させ,機能的な精子生産にもかかわらず不妊症につながった.
- MIS欠乏症の丸は,レイディグ細胞増殖および新形成を示した.
- XY Tfm/MISのダブルミュータントは,雌として発達し,雄性生殖器官がなく,下らない丸を持っていた.
結論:
- 男性の胎児の推定女性生殖管の除去は,生殖能力のために不可欠です.
- MISは,丸内のレイディッグ細胞増殖の負の調節剤として作用する.
- 女性の発達における適切な卵管形質変異には,推定の男性生殖器系が存在しないことが必要である.
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