NRDC遺伝子の二アレルバリアントが発達遅延および痙攣を伴う2人の兄弟姉妹に見られた
Fatemeh Fatehi1, Zeinab Ghorbanoghli1, Mahdieh Kooshki1
1Kariminejad-Najmabadi Pathology & Genetics Center, Tehran, Iran.
American journal of medical genetics. Part A
|December 26, 2025
まとめ
重度の神経発達障害を持つ兄弟姉妹において、NRDC遺伝子に病原性の可能性が高いバリアントが発見された。この発見はNRDCを支持するものである。
科学分野:
- 遺伝学
- 神経科学
- 分子生物学
背景:
- 神経発達障害(NDDs)は複雑な遺伝的疾患である。
- ヒトの神経発達におけるNRDC遺伝子の役割は完全には理解されていない。
- NRDCのバイアレルバリアントは、NDDsとまれに関連付けられている。
研究 の 目的:
- 2人のイラン人兄弟姉妹における重度の神経発達遅延の遺伝的基盤を調査すること。
- NRDC遺伝子における病原性バリアントを同定し、家族内での連鎖を評価すること。
- 神経発達障害におけるNRDCの役割の理解を深めること。
主な方法:
- 罹患した兄弟姉妹に対して全エクソームシーケンシング(WES)を実施した。
- サンガーシーケンシングを用いて、家族内でのバリアント連鎖を確認した。
- 小頭症、筋緊張低下、痙攣、および発話不能を含む臨床表現型を記録した。
主要な成果:
- NRDC遺伝子における新規のバイアレルフレームシフト欠失(c.1702_1703del)が両方の兄弟姉妹で同定された。
- 同定されたNRDCバリアントは、家族内で疾患と連鎖していた。
- 罹患した兄弟姉妹は、重度の神経発達遅延、小頭症、筋緊張低下、痙攣、および発話不能を呈した。
結論:
- NRDCのバイアレル病原性バリアントは、重度の神経発達障害と関連している。
- 本研究は、ヒトの脳発達におけるNRDCの重要な役割について、さらなる証拠を提供する。
- NRDCバリアントに関連する表現型スペクトラムを拡大することは、診断と理解にとって重要である。
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