青年期における自殺念慮および自殺行動に関連する内因性および外因性の遺伝的要因の独自性と共有性:青年期脳認知発達研究からの知見
Nathaniel S Thomas1, I-Tzu Hung1, Zuriel Ceja2
1Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ, United States of America.
Journal of affective disorders
|December 20, 2025
まとめ
内因性および外因性行動の遺伝的要因は、青年期の自殺念慮および行動(STBs)に著しく影響を与える。これらの遺伝的素因は、行動表現型を介して、STBsに直接的および間接的に影響する。
科学分野:
- 精神医学; 遺伝学; 発達心理学
背景:
- 自殺念慮および行動(STBs)は、小児および青年における主要な公衆衛生上の懸念事項である。; 内因性(INT)および外因性(EXT)の行動表現型はSTBsと関連しているが、それらの共有および独自の遺伝的基盤についてはさらなる調査が必要である。
研究 の 目的:
- 青年における内因性および外因性表現型の独自および共有された遺伝的寄与を調査すること。; 遺伝的素因がINTおよびEXTのSTBsに影響を与える直接的および間接的な経路を探求すること。
主な方法:
- 青年期脳認知発達(ABCD)研究(9〜14歳)のデータを利用した。; 大規模ゲノムワイド関連解析に基づいて、内因性(INT)、外因性(EXT)、およびそれらの重複(INT-EXT)の多因子遺伝子スコア(PGS)を構築した。; 自殺念慮(SI)および自殺企図(SA)を含むSTBsに対するPGSの直接的および間接的影響を分析した。
主要な成果:
- 内因性PGSは自殺企図(SA)に対して有意な直接効果を示した。; 外因性PGSは、受動的および能動的な自殺念慮(SI)を有意に予測した。; INT-EXT PGSは、受動的SI、能動的SI、およびSAを有意に予測した。表現型INTおよびEXTを介したすべての間接効果は有意であった。
結論:
- 内因性および外因性行動の遺伝的素因は、直接的な遺伝的経路と行動表現型によって媒介される間接的な経路の両方を通じて、青年期のSTBsに影響を与える。; 本研究結果は、若者の内因性および外因性行動の遺伝的および表現型の両側面を標的とした予防戦略の必要性を示唆している。
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