title: Type-C Niemann-Pick disease: low density lipoprotein uptake is associated with premature cholesterol accumulation in the Golgi complex and excessive cholesterol storage in lysosomes.
abstract: Incubation of fibroblasts derived from patients with type-C Niemann-Pick disease with low density lipoprotein results in excessive intracellular accumulation of unesterified cholesterol. Cytochemical techniques revealed that this abnormal cholesterol accumulation is associated not only with a massive storage of cholesterol in lysosomes but also with a premature cholesterol enrichment of the Golgi complex. Cholesterol appeared also in the Golgi complex of some normal fibroblasts after 24 hr of low density lipoprotein loading. These findings indicate that components of the Golgi complex play a role in the intracellular translocation of exogenously derived cholesterol and that disruptions of the cholesterol transport pathway at the Golgi may, in part, be responsible for the deficiency in cholesterol utilization in type-C Niemann-Pick fibroblasts.
authors.affiliation: Endocrinology Section, National Institute of Diabetes, Digestive and Kidney Diseases, Bethesda, MD 20892.
authors.forename: E J
authors.initials: EJ
authors.lastname: Blanchette-Mackie
authors.forename: N K
authors.initials: NK
authors.lastname: Dwyer
authors.forename: L M
authors.initials: LM
authors.lastname: Amende
authors.forename: H S
authors.initials: HS
authors.lastname: Kruth
authors.forename: J D
authors.initials: JD
authors.lastname: Butler
authors.forename: J
authors.initials: J
authors.lastname: Sokol
authors.forename: M E
authors.initials: ME
authors.lastname: Comly
authors.forename: M T
authors.initials: MT
authors.lastname: Vanier
authors.forename: J T
authors.initials: JT
authors.lastname: August
authors.forename: R O
authors.initials: RO
authors.lastname: Brady
mesh_terms: D002478:Cells, Cultured; D002784:Cholesterol / Q000378:metabolism*; D005347:Fibroblasts / Q000378:metabolism; D005614:Freeze Fracturing; D006056:Golgi Apparatus / Q000378:metabolism*; D006801:Humans; D007150:Immunohistochemistry; D008077:Lipoproteins, LDL / Q000493:pharmacokinetics*; D008247:Lysosomes / Q000378:metabolism*; D008854:Microscopy, Electron; D009542:Niemann-Pick Diseases / Q000378:metabolism*
chemical_list: D008077:Lipoproteins, LDL; D002784:Cholesterol