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Immunological Subsets Characterization in Newly Diagnosed Relapsing-Remitting Multiple Sclerosis.

Emanuele D'Amico1,2, Aurora Zanghì1,3, Nunziatina Laura Parrinello4

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Newly diagnosed multiple sclerosis patients naive to treatment show distinct immune cell profiles. Key differences in myeloid, B, and T cells suggest potential biomarkers for early disease detection.

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Area of Science:

  • Immunology
  • Neurology
  • Cell Biology

Background:

  • Relapsing-remitting multiple sclerosis (RRMS) is a central nervous system autoimmune disease.
  • Understanding early immune system changes in treatment-naive RRMS patients is crucial for developing targeted therapies.
  • Flow cytometry is a key technique for analyzing immune cell populations.

Purpose of the Study:

  • To characterize myeloid, B, and T cell subsets in recently diagnosed, treatment-naive RRMS patients.
  • To identify potential immune cell biomarkers for early RRMS detection.
  • To compare immune cell profiles between RRMS patients and healthy controls.

Main Methods:

  • Prospective case-control study involving 52 treatment-naive RRMS patients and 104 age/sex-matched healthy controls.
  • Flow cytometry analysis of peripheral blood mononuclear cells to quantify immune cell subsets.
  • Receiver operating characteristic (ROC) curve analysis to evaluate biomarker potential.

Main Results:

  • Increased frequencies of monocytic myeloid-derived suppressor cells (Mo-MDSCs) and inflammatory monocytes in RRMS patients.
  • Reduced percentage of B-unswitched memory cells in RRMS patients compared to controls.
  • Elevated T-helper CD4+ cells and CD4+CD161+ subset in RRMS patients.
  • ROC analysis indicated significant biomarker potential for specific Mo-MDSC and T-cell subsets (AUC >70%).

Conclusions:

  • Treatment-naive RRMS patients exhibit unique immunophenotypes involving myeloid, B, and T cells.
  • Specific immune cell subsets may serve as valuable biomarkers for early RRMS diagnosis.
  • These findings highlight the complex immune dysregulation present at the early stages of MS.