ヴァルプロ酸は,ウィスターラットの自閉症モデルにおいて,性別の自閉症のような欠陥,腸-脳軸,および神経退行的変化を引き起こす
Ashish Jain1, Neha Dhir1, Amit Raj Sharma1,2
1Experimental Pharmacology Laboratory, Neurobehavioral Research Laboratory, Department of Pharmacology.
Behavioural pharmacology
|September 4, 2025
まとめ
ネズミにおけるヴァルプロ酸 (VPA) への産前曝露は男性と女性の両方で自閉症のような行動と神経発達の変化を誘発する. この研究は,自閉症スペクトル障害 (ASD) 研究に女性被験者を含める必要性を強調しています.
科学分野:
- 神経科学
- 発達生物学
- 薬理学について
背景:
- 自閉症スペクトル障害 (ASD) は複雑な神経発達状態で,男性ではより高い報告されています.
- 産前バルプロ酸 (VPA) 曝露は,ネズミのASDのような特徴を誘発する一般的な臨床前モデルです.
- 限定的な研究は,VPA誘発のASDモデルにおける性別特異的な結果を体系的に比較しています.
研究 の 目的:
- 産前VPA暴露後のウィスターラットの子孫における発達,行動,生理学的パラメータの性別特有の変化を調査する.
- オスとメスのネズミの自閉症のような行動,不安,記憶,うつ病のような特徴に対するVPAの影響を評価する.
- 胃腸の運動,脳腫れ,血脳障壁の機能,神経損傷を含む生理学的変化を性別的に調べる.
主な方法:
- 妊娠中のウイスターネズミは,妊娠12日目にVPA (600 mg/ kg) または塩素を1回,腹膜内注射した.
- 子孫は4つのグループに分けられ,対照群の雄,対照群の雌,VPAに曝露した雄,VPAに曝露した雌 (グループごとにn=9) であった.
- 神経行動評価には,不安,探索活動,社会的相互作用,記憶,うつ病のような行動のテスト,GITの運動性,脳腫,BBBの整合性,神経損傷の生理学的評価が含まれていました.
主要な成果:
- VPAに曝された両方の性別のラットは,高度の不安,探検活動の増加,繰り返しの行動,社会的欠陥,空間的および認識記憶の障害を含む,自閉症のような重要な行動を示しました.
- 双方の性別でVPAに曝された子孫において,うつ病のような特徴が観察された.
- 生理学的評価では,胃腸の運動性の変化,脳の腫の増加,血脳障壁機能の低下,神経損傷が示され,エストロゲン受容体β (ERβ/ ESR2) のmRNA発現における有意な性差は認められなかった.
結論:
- 子宮内でのVPA暴露は,オスのWistarラットとメスのWistarラットの両方で,幅広い自閉症のような行動と神経発達異常を引き起こす.
- この研究は,性別に関係なく,妊娠前のVPA暴露に関連した重要な生理学的および神経変性変化を示しています.
- これらの発見は,自閉症スペクトル障害の臨床前研究に両方の性別を含めることの大切さを強調し,包括的な理解を確保し,潜在的な性特異的な治療目標を特定します.
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