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Journal ArticleDOI

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

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TLDR
Treatment of NP-C2 fibroblasts with exogenous recombinant HE1 protein ameliorated lysosomal accumulation of low density lipoprotein-derived cholesterol.
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 HE1 gene, 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.

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Journal ArticleDOI

Existence and distribution of Niemann-Pick type 2C (NPC2) in prawn reproductive tract and its putative role as a cholesterol modulator during sperm transit in the vas deferens.

TL;DR: The presence of Niemann–Pick type 2C (NPC2) in the male reproductive tract is indicated, which may play an important role as a CHO modulator between the sperm membrane and vas deferens epithelial communication.
Journal ArticleDOI

At a glance: the largest Niemann-Pick type C1 cohort with 602 patients diagnosed over 15 years.

TL;DR: In this article , a 3-month-old boy with hepatic failure and severe mtDNA depletion was found to have a homozygous missense variant (c.544C > T, p.R182W) in the accessory subunit of the mitochondrial DNA polymerase gamma (POLG2), which is required for mitochondrial DNA replication.
Journal ArticleDOI

Iron Limitation Restores Autophagy and Increases Lifespan in the Yeast Model of Niemann–Pick Type C1

TL;DR: In this article , the effect of Ncr1 loss on cellular functions mediated by the yeast lysosome-like vacuoles was investigated, and the results revealed changes in vacuolar membrane proteins that are associated mostly with vesicle biology (fusion, transport, organization), autophagy, and ion homeostasis, including iron, manganese, and calcium.
Journal ArticleDOI

Expression and functional analysis of Niemann–Pick C2 gene in Phytoseiulus persimilis

TL;DR: In this article , the authors cloned a Niemann-Pick proteins type C2 (NPC2) from the transcriptome of Phytoseiulus persimilis Athias-Henriot.
References
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The Metabolic and Molecular Bases of Inherited Disease

TL;DR: In this paper, the authors present a list of disorders of MITOCHONDRIAL FUNCTION, including the following: DISORDERS OF MIOCHONDRIC FERTILITY XIX, XVI, XIX.
Journal ArticleDOI

Tissue fractionation studies. 6. Intracellular distribution patterns of enzymes in rat-liver tissue

TL;DR: The results are shown to favour the ferryl ion structure, or an isomer of this structure, for the higher oxidation state, and theHigher oxidation state may provisionally be named ferrylmyoglobin.
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Association of Mutations in a Lysosomal Protein with Classical Late-Infantile Neuronal Ceroid Lipofuscinosis

TL;DR: In this paper, the mannose 6-phosphate modification of newly synthesized lysosomal enzymes was used as an affinity marker, and a single protein was identified that is absent in LINCL.
Journal ArticleDOI

Niemann–Pick C1 Is a Late Endosome-Resident Protein That Transiently Associates with Lysosomes and the Trans-Golgi Network

TL;DR: Characterizing the subcellular location of the NPC1 protein suggests that U18666A may inhibit the retrograde transport of NPC1 from lysosomes to late endosomes for subsequent transfer to the trans-Golgi network.
Journal Article

Genetic heterogeneity in Niemann-Pick C disease: a study using somatic cell hybridization and linkage analysis.

TL;DR: In this article, the authors conducted a study on skin fibroblast cultures from 32 unrelated Niemann-Pick C patients covering the range of known clinical and biochemical phenotypes.
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