Report

Identification of HE1 as the Second Gene of Niemann-Pick C Disease

Science  22 Dec 2000:
Vol. 290, Issue 5500, pp. 2298-2301
DOI: 10.1126/science.290.5500.2298

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Abstract

Niemann-Pick type C2 disease (NP-C2) is a fatal hereditary disorder of unknown etiology characterized by defective egress of cholesterol from lysosomes. Here we show that the disease is caused by a deficiency in HE1, a ubiquitously expressed lysosomal protein identified previously as a cholesterol-binding protein. HE1 was undetectable in fibroblasts from NP-C2 patients but present in fibroblasts from unaffected controls and NP-C1 patients. Mutations in the HE1gene, which maps to chromosome 14q24.3, were found in NP-C2 patients but not in controls. Treatment of NP-C2 fibroblasts with exogenous recombinant HE1 protein ameliorated lysosomal accumulation of low density lipoprotein–derived cholesterol.

  • * To whom correspondence should be addressed. E-mail: lobel{at}cabm.rutgers.edu

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