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Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...

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Interaction between miR-142-3p and BDNF Val/Met Polymorphism Regulates Multiple Sclerosis Severity.

Ettore Dolcetti1,2, Alessandra Musella3,4, Sara Balletta1

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Area of Science:

  • Neuroimmunology
  • Genetics
  • MicroRNA Therapeutics

Background:

  • Multiple sclerosis (MS) is a complex CNS autoimmune disease with variable patient outcomes.
  • MicroRNA-142-3p (miR-142-3p) is implicated in MS pathogenesis through its interaction with interleukin-1beta (IL1β), affecting excitotoxicity.
  • Individual genetic variability may influence the impact of miR-142-3p on MS.

Purpose of the Study:

  • To investigate the influence of the BDNF Val66Met polymorphism (rs6265) on the excitotoxic effects of miR-142-3p in MS.
  • To explore the relationship between miR-142-3p, IL1β, and clinical parameters in MS patients with different BDNF genotypes.

Main Methods:

  • Analysis of miR-142-3p and IL1β levels in cerebrospinal fluid (CSF) from 114 MS patients at diagnosis.
  • Stratification of patients based on BDNF Val66Met (rs6265) genotype.
  • Correlation analysis between molecular markers, genetic background, and MS clinical parameters (EDSS, MSSS, ARMSS, PI).

Main Results:

  • In Met-carrier MS patients, miR-142-3p levels were decoupled from IL1β levels.
  • This decoupling was also observed in relation to MS disease severity and progression metrics.
  • The BDNF Val66Met polymorphism interferes with the IL1β-miR-142-3p axis in MS.

Conclusions:

  • The BDNF Val66Met polymorphism modulates the functional impact of the IL1β-miR-142-3p axis on MS.
  • This interaction offers novel insights into the heterogeneity of MS.
  • Understanding this genetic influence is crucial for advancing personalized medicine strategies in multiple sclerosis.