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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Multiple Sclerosis-associated Bacterial Ligand 654.

Jordan Brown1, Colleen Everett1, Jose A Barragan1

  • 1Department of Medical Education, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, Texas, USA.

Archives of Medical Research
|December 13, 2021
PubMed
Summary
This summary is machine-generated.

Interferon-beta (IFN-β) and Fingolimod treatments modulate microglial responses to bacterial ligands, potentially revealing new therapeutic mechanisms for multiple sclerosis (MS). These MS drugs reduce pro-inflammatory cytokine secretion and M1 polarization in human microglia.

Keywords:
FingolimodIFN-βLipid 654

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Area of Science:

  • Neuroimmunology
  • Microbiology

Background:

  • Multiple sclerosis (MS) pathogenesis involves complex risk factors, with emerging evidence implicating microbiome-derived ligands.
  • Human microglia play a critical role in neuroinflammation within the central nervous system.

Purpose of the Study:

  • To investigate the effects of first-line MS medications, Interferon-beta (IFN-β) and Fingolimod, on human microglial cellular responses.
  • To determine if these treatments alter microglial reactivity to Lipid 654, a bacterial ligand associated with MS.

Main Methods:

  • Human microglial cells (HMC3) were treated with IFN-β or Fingolimod.
  • Cytokine secretion was quantified using multiplex assays.
  • Microglia polarization was assessed via flow cytometry.

Main Results:

  • IFN-β and Fingolimod induced differential pro-inflammatory cytokine secretion.
  • Both treatments reduced M1-associated cytokine secretion upon stimulation with Lipid 654.
  • Flow cytometry indicated that IFN-β and Fingolimod contained the M1 microglial phenotype post-Lipid 654 stimulation.

Conclusions:

  • Findings offer novel insights into the mechanisms of IFN-β and Fingolimod in human microglia.
  • These results suggest potential new therapeutic strategies for regulating inflammatory responses in MS.