Peripheral Immunophenotyping Identifies Three Subgroups Based on T Cell Heterogeneity in Lupus Patients

Area of Science:

• Immunology
• Systemic Lupus Erythematosus (SLE) research
• Cellular heterogeneity in autoimmune diseases

Background:

• Systemic Lupus Erythematosus (SLE) is a complex autoimmune disease with diverse clinical manifestations.
• Understanding the immunophenotypic variations in SLE is crucial for developing targeted therapies.

Purpose of the Study:

• To investigate the diversity of SLE by immunophenotyping peripheral blood mononuclear cells.
• To classify SLE patients into subgroups based on distinct cellular profiles.

Main Methods:

• Flow cytometric analysis of B, T, and dendritic cells in 143 SLE patients and 49 healthy controls.
• Principal Component Analysis (PCA) and cluster analysis to identify immunophenotypic subgroups.

Main Results:

• SLE patients showed increased proportions of regulatory T (Treg) cells, follicular helper T (Tfh) cells, class-switched memory B cells, and plasmablasts compared to controls.
• Cluster analysis identified three SLE subgroups: T cell-independent, Tfh-dominant, and Treg-dominant.
• The Tfh-dominant group exhibited a higher proportion of treatment-resistant SLE.

Conclusions:

• SLE patients can be stratified into three subgroups based on T cell heterogeneity, particularly involving Tfh and Treg cells.
• Immunophenotyping provides valuable insights into SLE pathogenesis.
• These findings may guide the development of novel therapeutic strategies for SLE.