A pilot study of monocytes in relapsing remitting multiple sclerosis: Correlation with disease activity

Area of Science:

• Neuroimmunology
• Infectious Disease Research

Background:

• Multiple sclerosis (MS) involves numerous immune cells, with monocytes potentially initiating brain inflammation.
• Understanding monocyte subtype roles in MS pathogenesis is crucial.

Purpose of the Study:

• To investigate monocyte subset distribution in Egyptian relapsing-remitting MS (RRMS) patients.
• To correlate monocyte subsets with disease activity markers in RRMS.

Main Methods:

• Flow cytometry was used to characterize peripheral blood monocyte subsets in 44 RRMS patients and 44 controls.
• Disease activity was assessed using Expanded Disability Status Scale (EDSS) and MRI.

Main Results:

• Classical, intermediate, and non-classical monocyte percentages were significantly increased in RRMS patients compared to controls (p<0.05).
• No significant correlation was found between monocyte subsets and EDSS scores or relapse history.
• A significant increase in non-classical monocytes was observed in RRMS patients with active MRI findings (p=0.002).

Conclusions:

• All three monocyte subsets are significantly elevated in RRMS patients, irrespective of clinical disease activity.
• The non-classical monocyte subset shows particular relevance to MS pathology and may serve as a therapeutic target.