A distinct population of Low-Density Granulocytes with unique features associated with subclinical vascular alterations in Systemic Lupus Erythematosus - Summary - MDSpire
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A distinct population of Low-Density Granulocytes with unique features associated with subclinical vascular alterations in Systemic Lupus Erythematosus
To analyze a distinct myeloid subset of low-density granulocytes (LDGs) in relation to vascular complications in Systemic Lupus Erythematosus (SLE), highlighting their potential impact on patient outcomes.
Key Findings:
Identification of a distinct CD14⁺CD15⁺CD16⁺ population in PBMC from SLE patients and controls, termed APC-like neutrophils (nAPC-like).
nAPC-like cells correlated with Th1 (ρ=0.230; p=0.006), Th17 (ρ=0.244; p=0.004), and Treg cells (ρ=-0.219; p=0.010), as well as SLEDAI and anti-dsDNA titers.
Increased nAPC-like cells were found in patients with traditional cardiovascular risk factors or clinical/subclinical cardiovascular disease.
A minor CD16dim_nAPC-like subset was expanded in SLE and correlated with serum IL-6 and BLyS (p<0.05).
Interpretation:
The study reveals a previously unrecognized LDG subset with neutrophil and antigen-presenting cell-like features that may contribute to immune dysregulation and vascular changes in SLE and non-autoimmune individuals, suggesting new avenues for therapeutic intervention.
Limitations:
The study's cross-sectional design limits causal inferences.
Sample size for certain analyses may restrict generalizability, and potential biases in sample selection should be considered.
Conclusion:
The findings suggest that the identified nAPC-like subset may play a role in the pathogenesis of vascular complications in SLE, warranting further investigation to explore their therapeutic potential.
