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一般日本人集団における白質高信号体積とまれなNOTCH3バリアントとの有意な相関
Ikuko Mizuta1, Fumio Yamashita2,3,4, Yoichi Sutoh3,4
1Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Geriatrics & gerontology international
|February 11, 2026
まとめ
Hereditary genes like NOTCH3 may influence white matter hyperintensities (WMH) volume in older Japanese adults. This study found a correlation between rare NOTCH3 variants and WMH volume, suggesting a genetic link to cerebral small vessel disease.
科学分野:
- 神経学
- 遺伝学
- 放射線学
背景:
- 脳小血管疾患(CSVD)は高齢者に一般的であり、白質高信号(WMH)はその主要なMRI所見である。
- CSVDの遺伝的基盤を理解することは、リスクのある集団を特定し、標的介入を開発するために重要である。
研究 の 目的:
- 一般的な日本人集団におけるMRI所見に対するCSVDに関連する遺伝性遺伝子の寄与を調査すること。
- 具体的には、NOTCH3やABCC6などの遺伝子のバリアントと、WMHやラクナなどのCSVDのマーカーとの関係を調べること。
主な方法:
- 東北メディカルメガバンク(TMM)コホートの324人の50歳以上の個人から得られたMRIデータと遺伝子バリアントを分析した。
- NOTCH3、ABCC6、COL4A1、COL4A2、GLA、HTRA1、TREX1遺伝子のバリアントに焦点を当て、年齢、性別、高血圧、糖尿病などの要因を調整した。
- 遺伝子ベースの関連テスト(負担テスト、SKAT)を用いて、遺伝子バリアントとWMH/ラクナ体積との関係を分析した。
主要な成果:
- 病原性バリアントはABCC6遺伝子(n=20)で見つかった。
- シーケンスカーネル協会テスト(SKAT)を用いて、白質高信号(WMH)体積とまれなNOTCH3バリアントとの間に有意な相関が観察された(完全調整後p=0.027)。
- 頭蓋内主要動脈狭窄/閉塞(ICASO)とRNF213 p.Arg4810Lysバリアントとの間に関連は見られなかった。
結論:
- 本研究は、一般的な日本人集団において、NOTCH3バリアントが白質高信号(WMH)体積の決定に役割を果たす可能性を示唆している。
- この発見は、脳小血管疾患(CSVD)の病因に対する遺伝的寄与の可能性を強調している。
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