Lupus disease activity state and Foxp3 gene polymorphism

Area of Science:

• Immunogenetics
• Rheumatology
• Molecular Biology

Background:

• Systemic lupus erythematosus (SLE) is a complex autoimmune disease with diverse clinical manifestations.
• Fork head box protein 3 (Foxp3) is a crucial transcription factor for regulatory T (T-reg) cell function.
• Genetic variations, specifically single-nucleotide polymorphisms (SNPs), in immune-related genes can influence autoimmune disease susceptibility.

Purpose of the Study:

• To investigate the association between the functional Foxp3-3279 (rs3761548 C/A) gene polymorphism and the risk of developing SLE.
• To evaluate the relationship between this polymorphism and the disease activity status in SLE patients, including lupus nephritis.

Main Methods:

• A case-control study design was employed, including diagnosed SLE patients and controls.
• Disease activity was quantified using the Systemic Lupus Erythematosus Disease Activity Score (SLE-DAS).
• Genotyping for the Foxp3-3279 (rs3761548 C/A) polymorphism was performed using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) analysis.

Main Results:

• The AA and AC genotypes of the Foxp3-3279 polymorphism were significantly associated with an increased risk of SLE (7.25-fold and 2.88-fold, respectively).
• The A allele demonstrated a 3.12-fold increased risk for SLE development.
• The AA genotype was strongly linked to moderate-to-severe SLE disease activity and a 33.6-fold increased risk of lupus nephritis.

Conclusions:

• The Foxp3 -3279 (rs3761548 C/A) gene polymorphism is significantly associated with both the risk of developing SLE and the occurrence of lupus nephritis.
• This genetic variation's link to SLE disease activity underscores the role of the Foxp3 gene in SLE pathogenesis and clinical presentation.
• Identifying this SNP may offer insights for personalized treatment strategies in SLE management.