Sjögren's disease & overlap diseases

The role of M1/M2 macrophage polarization in primary Sjogren’s syndrome

Arthritis Res TherPublished Mechanistic study

Authors' conclusion

This study reveals the presence of an significant imbalance in M1/M2 macrophages in pSS patients.

Study context

Population
Patients with pSS and healthy controls; minor salivary gland samples from 10 of these patients and 10 non-pSS controls
Participants
30 / 30 / 10
Comparison
pSS vs healthy controls; pSS vs non-pSS controls
  • pSSn = 30
  • Healthy controlsn = 30reference
  • Non-pSS controlsn = 10reference
Outcome
Role of M1/M2 macrophage polarization in pSS pathogenesis (serum cytokines by ELISA, CD86+ M1 and CD206+ M2 macrophages in PBMCs by flow cytometry, macrophage infiltration of minor salivary glands by immunofluorescence)
Methodological detailscase-control
  • Case-control

Main finding

As reported in the abstract

  • Significant increase in M1 macrophages in peripheral blood in pSS
  • Significant increase in serum M1-related pro-inflammatory cytokines (IL-6, IL-23 and TNF-α) in pSS
  • M2 macrophages downregulated in peripheral blood of pSS
  • Minor salivary glands of pSS: M1 macrophage expression increased, M2 decreased
  • Significantly positive correlation between proportion of M1 macrophages in peripheral blood mononuclear cells (PBMCs) and serum IgG and RF

Original publication

The role of M1/M2 macrophage polarization in primary Sjogren’s syndrome. Arthritis Res Ther. Published 14 May 2024. doi:10.1186/s13075-024-03340-7

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