Cholesterol is sequestered in the brains of mice with Niemann-Pick Type C disease but turnover is increased

Chonglun Xie, Dennis K. Burns, Stephen D. Turley, John M. Dietschy

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89 Citations (Scopus)

Abstract

In Niemann-Pick Type C (NPC) disease, the concentration of cholesterol increases with age in every tissue except the brain. This study investigates whether accumulation of cholesterol might also occur within the cells of the central nervous system (CNS), but be obscured by the simultaneous loss of sterol from myelin as neurodegeneration proceeds. At birth, when there is little myelin in the CNS, the concentration of cholesterol is significantly elevated in every region of the brain in the homozygous NPC mouse. At 7 wk of age, myelination is nearly complete. In the NPC mouse, however, there is striking neurodegeneration and a reduction in both myelin protein and myelin cholesterol. Furthermore, net loss of cholesterol from the CNS is much higher in the NPC mouse than in the control animal (2.23 versus 1.37 mg/day per kg) so that the concentration of sterol in most regions of the brain is reduced. This neurodegeneration and loss of myelin cholesterol is not prevented by deletion of either the low-density lipoprotein receptor or apolipoprotein E in the NPC animal. Thus, the cholesterol sequestration seen in every organ in NPC disease also occurs in cells of the CNS and may be etiologically related to the neurode-generation.

Original languageEnglish (US)
Pages (from-to)1106-1117
Number of pages12
JournalJournal of Neuropathology and Experimental Neurology
Volume59
Issue number12
StatePublished - 2000

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Type C Niemann-Pick Disease
Cholesterol
Myelin Sheath
Brain
Central Nervous System
Sterols
Myelin Proteins
LDL Receptors
Apolipoproteins E
Parturition

Keywords

  • Apolipoprotein E
  • Demyelination
  • Endosomes
  • Low-density lipoprotein receptor
  • Lysosomes
  • Neurodegeneration

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neuroscience(all)

Cite this

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abstract = "In Niemann-Pick Type C (NPC) disease, the concentration of cholesterol increases with age in every tissue except the brain. This study investigates whether accumulation of cholesterol might also occur within the cells of the central nervous system (CNS), but be obscured by the simultaneous loss of sterol from myelin as neurodegeneration proceeds. At birth, when there is little myelin in the CNS, the concentration of cholesterol is significantly elevated in every region of the brain in the homozygous NPC mouse. At 7 wk of age, myelination is nearly complete. In the NPC mouse, however, there is striking neurodegeneration and a reduction in both myelin protein and myelin cholesterol. Furthermore, net loss of cholesterol from the CNS is much higher in the NPC mouse than in the control animal (2.23 versus 1.37 mg/day per kg) so that the concentration of sterol in most regions of the brain is reduced. This neurodegeneration and loss of myelin cholesterol is not prevented by deletion of either the low-density lipoprotein receptor or apolipoprotein E in the NPC animal. Thus, the cholesterol sequestration seen in every organ in NPC disease also occurs in cells of the CNS and may be etiologically related to the neurode-generation.",
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AU - Xie, Chonglun

AU - Burns, Dennis K.

AU - Turley, Stephen D.

AU - Dietschy, John M.

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AB - In Niemann-Pick Type C (NPC) disease, the concentration of cholesterol increases with age in every tissue except the brain. This study investigates whether accumulation of cholesterol might also occur within the cells of the central nervous system (CNS), but be obscured by the simultaneous loss of sterol from myelin as neurodegeneration proceeds. At birth, when there is little myelin in the CNS, the concentration of cholesterol is significantly elevated in every region of the brain in the homozygous NPC mouse. At 7 wk of age, myelination is nearly complete. In the NPC mouse, however, there is striking neurodegeneration and a reduction in both myelin protein and myelin cholesterol. Furthermore, net loss of cholesterol from the CNS is much higher in the NPC mouse than in the control animal (2.23 versus 1.37 mg/day per kg) so that the concentration of sterol in most regions of the brain is reduced. This neurodegeneration and loss of myelin cholesterol is not prevented by deletion of either the low-density lipoprotein receptor or apolipoprotein E in the NPC animal. Thus, the cholesterol sequestration seen in every organ in NPC disease also occurs in cells of the CNS and may be etiologically related to the neurode-generation.

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