生まれながらの高インスリン症候群による歌舞症候群の臨床的表象と分子的特徴:遡及的研究
Mélanie Gaudillière1, Thibaud Armand2, Valérie Senée3
1Department of Pediatric Endocrinology, Diabetology and Metabolism, Hôpital Femme-Mère-Enfant, Hospices Civils de Lyon, Lyon, FRA.
Cureus
|February 16, 2026
まとめ
カブキ症候群 (KS) の患者は,先天性高インスリン症候群 (CHI) に関連する低血糖症を頻繁に経験する. KSにおける早期スクリーニングとKMT2D遺伝子変異分析は,低血糖症の管理と神経学的問題の予防に不可欠です.
科学分野:
- 遺伝学と希少疾患について
- 小児内分泌学 小児内分泌学
背景:
- カブキ症候群 (KS) は,先天性高インスリン症候群 (CHI) と関連した珍しい遺伝疾患です.
- KS患者の低血糖症は,重大な長期的な神経学的合併症につながる可能性があります.
- KSにおけるCHI関連低血糖症の正確な発生率と管理については,さらなる調査が必要です.
研究 の 目的:
- カブキ症候群患者のCHI関連低血糖症の発生率を決定する.
- このコホートにおける低血糖症の臨床進化と治療への反応を記述する.
- KMT2D変種と低血糖症の間の潜在的な遺伝子型-フェノタイプ相関性を調査する.
主な方法:
- 1999年から2024年の間にKabuki症候群と診断された患者を対象に,単一センターでの遡及研究が行われました.
- 低血糖症,CHI診断,KMT2Dの遺伝的変異,治療結果に関する患者のデータを分析した.
主要な成果:
- 18人のKS患者のうち33% (6/18) が新生児低血糖症で,28% (5/18) がCHIと診断されました.
- 3人の患者は,抗低血糖薬を必要とする持続的なCHIを患っており,ダイアゾキシド単独治療に良好な反応を示しました.
- 低血糖症のすべての患者は,ヘテロジゴスなKMT2Dの変異体を持ち,C末端領域で主に断片化型であった.
結論:
- 低血糖症のシステマティックスクリーニングは,Kabuki症候群の早期診断に不可欠です.
- 生まれながらの高インスリン症は,低血糖症を呈する乳児では考慮すべきであり,KMT2D.の遺伝子検査を促す.
- ゲノタイプ-フェノタイプ相関を理解することで,KSにおける低血糖症の標的型管理を導くことができます.
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