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Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
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Genetics of primary progressive multiple sclerosis.

Bruce A C Cree1

  • 1Department of Neurology, University of California, San Francisco, USA.

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|February 11, 2014
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Summary
This summary is machine-generated.

Genetic factors influencing primary progressive multiple sclerosis (PPMS) remain elusive. Current research has not identified distinct genes for PPMS, suggesting larger datasets or non-genetic factors may be involved.

Keywords:
APOEDRB1*1501HLAdisease coursegenetic associationgeneticsmajor histocompatibility complex

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Area of Science:

  • Neurology
  • Genetics
  • Immunology

Background:

  • Multiple sclerosis (MS) presents as relapsing or progressive forms.
  • Primary progressive MS (PPMS) is characterized by older onset and rapid disability.
  • PPMS is less responsive to treatments used for relapsing MS.

Purpose of the Study:

  • To systematically review the genetic literature for primary progressive MS (PPMS).
  • To explore the potential role of genetic variance in determining MS disease course.
  • To identify potential therapeutic targets for PPMS through genetic discovery.

Main Methods:

  • Systematic review of existing PPMS genetic literature.
  • Analysis of genome-wide association studies (GWAS) for MS susceptibility genes.
  • Comparison of genetic findings between PPMS and relapsing-onset MS phenotypes.

Main Results:

  • No distinct genetic differences have been identified between PPMS and relapsing-onset MS.
  • Genome-wide screens found multiple MS susceptibility genes outside the MHC, with weak individual contributions.
  • Current genetic variants do not fully explain the differences between PPMS and relapsing MS.

Conclusions:

  • Identifying genes specific to PPMS requires very large datasets due to its lower prevalence.
  • International collaboration may be necessary to identify PPMS-associated genes.
  • Non-genetic factors might also contribute to the differences between PPMS and relapsing MS phenotypes.