親 の 介護 を 促進 する 新しい 副腎 細胞 の 進化
Natalie Niepoth1,2, Jennifer R Merritt1,2, Michelle Uminski1,2
1Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA.
Nature
|May 15, 2024
まとめ
オールドフィールドマウスは 20α-ヒドロキシプロゲステロンを産生する新しい副腎細胞種を進化させ,一夫一婦の行動を促した. この発見は脳外での 新しい細胞進化と 社会的行動の変化を結びつけています
科学分野:
- 進化生物学
- 神経内分泌学
- 動物の行動遺伝学
背景:
- 特殊な細胞タイプは動物の行動に不可欠ですが 進化の起源と行動への影響はよくわかっていません
- 新しい細胞型の発生の遺伝的根拠を理解することは,行動進化を説明する鍵です.
研究 の 目的:
- オールドフィールドマウス (Peromyscus polionotus) の一夫一妻制の進化の基礎となる遺伝的および細胞的メカニズムを調査する.
- 社会行動の進化における新しい細胞タイプとその機能的役割を特定する.
主な方法:
- 単一性オールドフィールドマウスと乱交性鹿マウス (Peromyscus maniculatus) の副腎細胞タイプと遺伝子発現の比較分析.
- ホルモンの変換とレベルを測定するための生化学分析
- 定量的な特徴の場所 (QTL) は,種間クロスでマッピングされます.
主要な成果:
- オールドフィールドマウスでは,AKR1C18を発現する新しい副腎細胞タイプが発見され,プロゲステロンを20α-ヒドロキシプロゲステロンに変換する.
- 20α-ヒドロキシプロゲステロンはオールドフィールドマウスでより豊富に存在し,単一親の行動を誘発する.
- GADD45AとテンアシンNの発現における異種間の遺伝的変異は,新種の細胞の出現と機能と関連していた.
結論:
- 特定の副腎細胞の最近の進化は 社会的行動の進化に寄与しています 特に一夫一妻制です
- この研究は ニューロン以外の細胞の進化が 行動の変化を促すモデルを示しています
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