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Background — Systemic lupus erythematosus (SLE) is an inflammatory autoimmune disease characterized by production of autoantibodies and deposition within various organs. The incidence of SLE averages 5 cases per 100,000 population. Various genome wide studies have shown association of STAT4 (signal transducer and activator of transcription 4) gene with SLE and lupus nephritis (LN). Therefore, this study was designed to determine single nucleotide polymorphism (SNP) in STAT4 (rs7582694) in local SLE, LN patients and healthy controls.Objective — To determine the frequency of STAT4 (rs7582694) gene polymorphism in systemic lupus erythematosus, lupus nephritis patients and healthy controls.Methods — It was a case-control study. Eighty samples were recruited for each of two study groups. Deoxyribonucleic acid (DNA) extraction was carried out using standard phenol chloroform method. Further, samples were processed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) conventional technique and genotypes were determined. Polymorphism analysis and allele frequencies were compared between groups using the chi-square test. Project was approved by the Ethical Review Board at the University of Health Sciences, Lahore, Pakistan.Results — Females were more inclined towards developing SLE. The study unveiled that SNP in STAT 4 gene (rs7582694) was associated with SLE patients in Pakistani population which indicates that this may play a role in susceptibility to SLE. Moreover, we infer that genetic variations within STAT4 (rs7582694) predispose patients to lupus nephritis. It was also evident that GG and GC genotypes were more susceptible of further transforming into SLE and LN.Conclusion: The findings of this study may contribute to a better understanding of underlying etiological and prognostic factors regarding SLE and LN.

russian open medical journal

Association of signal transducer and activator of transcription 4 gene (restriction site7582694) single nucleotide polymorphism with systemic lupus erythematosus