VDR and systemic lupus erythematosus: In SLE, the GAT/GCT haplogenotype carriers showed a 2.33-fold higher VDR expression, while the AAC/GCT carriers exhibited a 5.26-fold lower VDR expression compared to the GCT/GCT group; in the CS, the AAC/GCT haplogenotype carriers presented 5.52-fold higher VDR expression than the CS with the reference haplogenotype (Figure 4f).