The percent of patients with positive AT1R antibodies in lupus nephritis was statistically significantly higher than in membranous nephropathy, focal and segmental glomerulosclerosis, IgA nephropathy, mesangial proliferative (non-IgA glomerulonephritis, p-ANCA vasculitis according to a chi-square test. The gene discussed is AGTR1; the disease is focal segmental glomerulosclerosis.