ヒト胎児および思春期前精巣におけるセルトリ細胞および生殖細胞発生の時間的ダイナミクス

Iris Sanou^1,2,3, Mathangi Lakshmipathi^1,2, Lisette K Schönhage^1,2

¹Reproductive Biology Laboratory, Centre for Reproductive Medicine, Amsterdam UMC location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.

Biology open

|February 6, 2026

まとめ

本研究はヒト精巣の発達をマッピングし、セルトリ細胞の成熟が精子形成の開始に先行することを発見した。このタイムラインの理解は、男性の生殖能力および生体外配偶子形成モデルの開発にとって極めて重要である。

科学分野:

生殖生物学; 発達生物学; ヒト発生学

背景:

男性の生殖能力は、適切な精巣の発達に依存する。; ヒトのセルトリ細胞および生殖細胞の成熟の正確なタイミングは、まだ完全には理解されていない。

研究の目的:

ヒト生殖細胞およびセルトリ細胞の発達タイムラインを確立するため。; 生体外配偶子形成および生殖能力保存戦略の参照を提供するため。

主な方法:

在胎7週から13.5歳までの48個のヒト精巣サンプルの分析。; OCT3/4およびMAGE-A4マーカーを使用した生殖細胞集団の同定。; AMHおよびAR発現の変化によるセルトリ細胞成熟の評価。

主要な成果:

Octamer binding transcription factor (OCT)3/4+ 胚細胞は、増殖性の胎児生殖細胞の鍵である。; メラノーマ関連抗原 (MAGE)-A4+ 細胞は、子宮内および小児期のゆっくりと分裂する生殖細胞を表す。; AMHの低下とARの増加によって示されるセルトリ細胞の成熟は、思春期前に起こり、増殖は2〜2.5歳でピークに達する。

結論:

ヒトでは、セルトリ細胞の成熟が精子形成の開始に先行する。; 確立されたタイムラインは、生体外配偶子形成の開発に役立つ。; この研究は、生殖能力の保存および回復の取り組みを支持する。

キーワード:

ヒト精巣の発達管腔形成男性不妊セルトリ細胞精子形成開始

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