主要なLAMP-2欠乏症は,X関連真空心筋病および筋病 (ダノン病) を引き起こします

I Nishino¹, J Fu, K Tanji

¹Department of Neurology, Columbia University, New York, New York 10032, USA. nishino@ncnp.go.jp

Nature

|September 6, 2000

まとめ

ダノン病は,心臓と筋肉の障害であり,リソソーム膜タンパク質LAMP-2の欠乏によって引き起こされます. この発見は,ヒトの心筋病および筋病の新たな原因を特定しています.

科学分野:

遺伝学遺伝学とは
細胞生物学細胞生物学
神経学神経学とは

背景:

ダノン病は,心筋病,筋病,知的障害を伴う.
病理学的には,オートファジック物質と筋肉細胞のグリコゲンを含む細胞プラズマの真空を特徴としています.

研究の目的:

ダノン病の根本的な原因を調査するために.
このリゾソーマルグリコゲン貯蔵障害の遺伝的基礎を特定するために.

主な方法:

ダノン病の10人の無関係患者の臨床評価.
LAMP-2欠陥を特定するための遺伝分析.
LAMP-2欠乏マウスのフェノタイプ分析.

主要な成果:

10人の患者はリソソーム関連膜タンパク質-2 (LAMP-2) の一次欠乏を示した.
LAMP-2欠乏症のマウスは,同様の真空心筋骨格筋症を発症した.
この研究は,LAMP-2欠乏症とダノン病を関連付けています.

結論:

主要なLAMP-2欠乏症はダノン病の原因である.
これは,酵素ではなく,リソソムの構造タンパク質の欠陥に起因する,ヒトの心臓病-筋髄病を初めて特定したものです.

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