常見の22q11. 2削除によって媒介される髄膜細胞の危険性
Keng Ioi Vong1,2, Sangmoon Lee1,2, Kit Sing Au3
1Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA.
まとめ
22q11. 2の欠失は重度の神経管の欠陥である髄膜炎症のリスクを大幅に増加させる. 葉酸の補給は,罹患した個人にこのリスクを軽減するのに役立ちます.
科学分野:
- 遺伝学
- 発達生物学
- 公衆衛生
背景:
- 髄膜炎症は重度の神経管欠陥 (NTD) で,中枢神経系における最も一般的な構造的先天性欠陥である.
- 髄膜病原菌の遺伝的原因を特定することは,その病因を理解し,予防戦略を開発するために不可欠です.
研究 の 目的:
- 髄膜炎の遺伝的基盤を調査する
- 染色体22q11. 2の欠失と髄膜炎のリスクを決定する.
主な方法:
- 715の親子トリオの エクソームとゲノム配列解析
- 別々の22q11.2削除コホートの分析
- 標的型遺伝子消去 (Crkl) と母性葉酸欠乏症のマウスモデルでの複製研究
主要な成果:
- 染色体22q11. 2の欠損が認められ,リスクは23倍に増加した.
- 別なコホートでは,22q11. 2の欠損を有する個体で12~15倍に増加した髄膜骨髄腫の危険性が示された.
- ネズミのニューラルチューブ発現遺伝子Crklの喪失は,NTDを複製し,母親の葉酸欠乏により重症化します.
結論:
- 常見の22q11. 2欠失は,髄膜炎の重要な危険因子である.
- 母親の葉酸欠乏症は,22q11. 2欠損に関連するNTDのリスクと重症性を悪化させる.
- 葉酸補給は,22q11. 2の削除の文脈で髄膜細胞細胞に対する保護効果を提供することができる.
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