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A deep transcriptome meta-analysis reveals sex differences in multiple sclerosis.

José Francisco Català-Senent1, Zoraida Andreu2, Marta R Hidalgo1

  • 1Bioinformatics and Biostatistics Unit, Principe Felipe Research Center (CIPF), 46012 Valencia, Spain.

Neurobiology of Disease
|April 6, 2023
PubMed
Summary
This summary is machine-generated.

This study reveals significant sex-based differences in multiple sclerosis (MS) at the molecular and functional levels, particularly within the immune system. Understanding these sex differences is crucial for developing personalized medicine approaches for MS.

Keywords:
BiomarkersFunctional profilingMeta-analysisMultiple sclerosisNeurodegenerationSex-based differences

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Area of Science:

  • Neuroimmunology
  • Genomics
  • Sex-based biology

Background:

  • Multiple sclerosis (MS) disproportionately affects females, yet the underlying sex-based factors remain unclear.
  • Investigating sex differences in MS is essential for identifying novel therapeutic targets.
  • This research aims to uncover molecular mechanisms driving sex disparities in MS.

Approach:

  • A systematic review and meta-analysis of genome-wide transcriptome studies in MS patients with available sex data.
  • Differential gene expression analysis was performed for female-specific, male-specific, and sex-differential impacts of the disease.
  • Gene set analysis was conducted on brain tissue to characterize sex differences in biological pathways.

Key Points:

  • Identified 1 MS-associated gene in blood and 13 in brain tissue that differed between sexes.
  • Females with MS showed altered innate immune responses and mitochondrial/metabolic pathways.
  • Males with MS exhibited dysregulated adaptive immune responses and stress-related pathways.

Conclusions:

  • Significant transcriptomic and functional sex differences exist in MS, especially in immune system regulation.
  • These findings underscore the importance of considering biological sex in MS research.
  • The study supports the development of sex-specific research and personalized medicine for MS.