Background: Rheumatoid arthritis (RA) is one of the systemic inflammatory autoimmune diseases. A number of previous studies showed the potency of Protein Tyrosine Phosphatase Non-Receptor Type 22 (PTPN22) 1858c>T gene polymorphism with the incidence of rheumatoid arthritis.
Objective: To know the relationship of PTPN22 1858C>T gene polymorphism with disease activity score-28 (DAS-28) in rheumatoid arthritis patients at H. Adam Hospital Medan.
Method: 69 rheumatoid arthritis patients were conducted in this study by consecutive sampling who were treated at H. Adam Malik General Hospital, Medan from February-August 2022. The PTPN22 gene polymorphism was genotyped using polymerase chain reaction.
Results: Majority of the subject in the study was female, around 65 people (94.2%). The mean age of the subjects was 42.35 ± 12.28 years old. The most ethnic group was Batak with 34 people (49.3%). Mean DAS-28 score was 3.45 ± 0.79. All CC genotypes and C alleles were found in 69 (100%) subjects. Statistical analysis found no correlation between PTPN22 1858C>T gene polymorphism and DAS-28 score with p value <1.0
Conclusion: PTPN22 1858C>T gene polymorphism has no significant relationship DAS-28 in rheumatoid arthritis.
Keywords: PTPN22 1858C>T gene polymorphism, Disease Activity Index-28, rheumatoid arthritis
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