Primary LAMP-2 deficiency causes X-linked vacoular cardiomyopathy and myopathy (Danon disease)

Ichizo Nishino, Jin Fu, Kurenai Tanji, Takeshi Yamada, Sadatomo Shimojo, Tateo Koori, Marina Mora, Jack E. Riggs, Shin J. Oh, Yasutoshi Koga, Carolyn M. Sue, Ayaka Yamamoto, Nobuyuki Murakami, Sara Shanske, Edward Byrne, Eduardo Bonilla, Ikuya Honaka, Salvatora DiMauro, Michlo Hirano

Research output: Contribution to journalArticlepeer-review


'Lysosomal glycogen storage disease with normal acid maltase', which was originally described by Danon et al., is characterized clinically by cardiomyopathy, myopathy and variable mental retardation. The pathological hallmark of the disease is intra-cytoplasmic vacuoles containing autophagic material and glycogen in skeletal and cardiac muscle cells. Sarcolemmal proteins and basal lamina are associated with the vacuolar membranes. Here we report ten unrelated patients, including one of the patients from the original case report, who have primary deficiencies of LAMP-2, a principal lysosomal membrane protein. From these results and the finding that LAMP-2-deficient mice manifest a similar vacuolar cardioskeletal myopathy, we conclude that primary LAMP-2 deficiency is the cause of Danon disease4. To our knowledge this is the first example of human cardiopathy-myopathy that is caused by mutations in a lysosomal structural protein rather than an enzymatic protein.

Original languageEnglish
Pages (from-to)906-910
Number of pages5
Issue number6798
Publication statusPublished - Aug 24 2000

ASJC Scopus subject areas

  • General


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