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Exploring myelin dysfunction in multiple system atrophy.

Joanna H Wong1, Glenda M Halliday1, Woojin Scott Kim1

  • 1Neuroscience Research Australia, Sydney, NSW 2031, Australia. ; School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia.

Experimental Neurobiology
|December 31, 2014
PubMed
Summary
This summary is machine-generated.

Multiple system atrophy (MSA) involves autonomic and motor system degeneration due to alpha-synuclein in oligodendrocytes. This perspective explores its unique pathology involving myelin and lipid dysfunction.

Keywords:
Multiple system atrophylipid dyshomeostasismyelinoligodendrocyteα-synuclein

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Area of Science:

  • Neurodegenerative diseases
  • Neurobiology
  • Molecular pathology

Background:

  • Multiple system atrophy (MSA) is a rare, fatal neurodegenerative disease characterized by autonomic failure and parkinsonism or cerebellar ataxia.
  • Its pathology involves alpha-synuclein aggregation, classifying it as an alpha-synucleinopathy, but uniquely in oligodendrocytes.
  • Current understanding lacks definitive causes, risk factors, cures, or effective treatments for MSA.

Purpose of the Study:

  • To synthesize evidence exploring the roles of alpha-synuclein, myelin protein dysfunction, lipid dyshomeostasis, and ABCA8 in MSA pathogenesis.
  • To elucidate the unique pathological pathway of MSA, distinct from other alpha-synucleinopathies.
  • To highlight the sequence of events: abnormal protein redistribution in oligodendrocytes, followed by myelin dysfunction and neurodegeneration.

Main Methods:

  • This is a perspective piece, synthesizing existing evidence.
  • Review of in vitro studies on protein distribution and lipid transport.
  • Analysis of the pathological pathway in oligodendrocytes and myelin.

Main Results:

  • MSA pathology uniquely involves alpha-synuclein deposition in oligodendrocytes, leading to myelin dysfunction.
  • Aberrations in protein distribution and lipid transport are implicated in myelin dysfunction.
  • The pathological cascade appears to be oligodendrocyte protein abnormalities, then myelin dysfunction, and finally neurodegeneration.

Conclusions:

  • Alpha-synuclein, myelin protein dysfunction, lipid dyshomeostasis, and ABCA8 are potential key players in MSA pathogenesis.
  • Understanding these factors may reveal unique therapeutic targets for MSA.
  • Further research into oligodendrocyte and myelin pathology is crucial for developing effective MSA treatments.