Aim This study was carried out to determine the effects of interleukin (IL)-10 gene polymorphism 1082A/G on clinical diversity and activity of systemic lupus erythematosus (SLE), as it was shown to be associated with E26 transcription factor binding site, and to assess IL-10 concentration in SLE patients. Patients and methods Blood was drawn from 54 SLE patients and 27 healthy controls for DNA extraction. The single nucleotide polymorphism was identified using the PCR-restriction fragment length polymorphism, and serum sample was collected to assay IL-10 concentration. Results There was an increase in IL-10 concentration in SLE total patients (mean 49.5 pg/ml). Mutant allele A (76.9%) was found more frequently in SLE patients compared with allele G (23.1%). Genotype AA (66.7%) was found more frequently, followed by AG (20.4%) and GG (12.9%). Conclusion IL-10 concentration was elevated in SLE patients and was shown to be associated with disease activity. IL-10 gene polymorphism is not a strong indicator to show susceptibility of the disease
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