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A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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Global transcriptome profiling of mild relapsing-remitting versus primary progressive multiple sclerosis.

M W Koch1,2, Y Ilnytskyy3, A Golubov3

  • 1Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Calgary, AB.

European Journal of Neurology
|January 10, 2018
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Gene expression in peripheral blood differs significantly between mild relapsing-remitting multiple sclerosis (mRRMS) and primary progressive multiple sclerosis (PPMS) patients. These differences are primarily driven by immune and inflammatory pathways, suggesting distinct immunological underpinnings for MS disease courses.

Keywords:
geneticsmild multiple sclerosismultiple sclerosispathophysiologyprimary progressive multiple sclerosis

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Area of Science:

  • Immunology
  • Genetics
  • Neurology

Background:

  • Multiple sclerosis (MS) research often overlooks variations in disease courses.
  • Comparing distinct MS phenotypes is crucial for understanding disease heterogeneity.

Purpose of the Study:

  • To investigate peripheral blood gene expression differences between mild relapsing-remitting MS (mRRMS) and primary progressive MS (PPMS).
  • To identify specific molecular pathways associated with distinct MS disease courses.

Main Methods:

  • Global gene expression profiling of peripheral blood samples from mRRMS and PPMS patients.
  • Bioinformatic analyses including gene set enrichment, pathway, and principal component analyses.
  • Identification of differentially expressed genes and pathways between the two MS phenotypes.

Main Results:

  • 84 genes showed significant deregulation between mRRMS and PPMS groups.
  • Upregulated pathways in PPMS vs. mRRMS included antigen processing, leukocyte migration, and chemokine signaling.
  • Downregulated pathways in PPMS vs. mRRMS involved RNA transport, spliceosome, and aminoacyl-tRNA biosynthesis.

Conclusions:

  • Significant gene expression differences exist between mRRMS and PPMS, primarily involving immunological and inflammatory pathways.
  • Distinct immune responses may underlie the different MS disease phenotypes.
  • Further research, including central nervous system tissue analysis, is needed to confirm these findings.