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[HLA-DRB1 alleles genotyping in patients with rheumatoid arthritis in Chinese]
1Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Beijing.
Insights
The HLA-DRB1 gene, specifically HLA-DR4, is strongly associated with rheumatoid arthritis (RA) development in the Chinese population. HLA-DR4 may serve as a prognostic marker for RA severity.
Area of Science:
- Immunogenetics
- Rheumatology
- Human Genetics
Context:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease with a complex etiology.
- Genetic factors, particularly human leukocyte antigen (HLA) genes, play a significant role in RA susceptibility and pathogenesis.
- Understanding the specific HLA alleles associated with RA is crucial for disease prediction and management.
Purpose:
- To investigate the association between HLA-DRB1 gene polymorphisms and the development of rheumatoid arthritis (RA) in a Chinese population.
- To explore correlations between specific HLA-DR alleles and the clinical and serological manifestations of RA patients.
Summary:
- This study analyzed HLA-DRB1 alleles in 86 RA patients and 106 controls using PCR-SSP and PCR-SSO methods.
- An increased frequency of HLA-DR4 (48.8% vs 17.9%) and a decreased frequency of HLA-DR5 were observed in RA patients compared to controls.
- The HLA-DR4 subtype DRB1*0405 was significantly more prevalent in RA patients (61.9%) than in controls (21.1%).
- Rheumatoid factor positivity and more severe radiographic stages were associated with HLA-DR4 positivity.
Impact:
- HLA-DR4 and its subtype DRB1*0405 are significantly related to RA development in the Chinese population.
- HLA-DR4 may serve as a valuable prognostic marker for assessing RA severity and guiding treatment strategies.
- These findings contribute to understanding the genetic basis of RA and have implications for personalized medicine.
Abstract:
To explore the role of HLA-DRB1 genes in the development of rheumatoid arthritis (RA) and the correlations between HLA-DR alleles and clinical manifestations of patients with RA we studied 86 patients and 106 race matched controls in whom HLA-DR typing was performed by the method of DNA amplification with sequence-specific primers (PCR-SSP). The subtypes of HLA-DR4 were determined by the method of hybridization of PCR products with sequence-specific oligonucletides (PCR-SSO). The absence or presence of HLA-DR4 and its subtypes was evaluated with the clinical and serological characteristics of the patients. Compared with controls, an increased gene frequency of HLA-DR4 (48.8% vs 17.9%, P < 0.001) and a decreased frequency of HLA-DR5 (16.3% vs 27.4%, P = 0.06) were found. The DRB1 * 0405 accounted for 61.9% of DR4+ RA patients and 21.1% of DR+4 controls (P < 0.01). There was no difference between the DR4+ and DR4- patients with respect to age, sex, duration of disease, extra-articular manifestations including secondary Sjogren's syndrome. But rheumatoid factor (RF) was associated with HLA-DR4 (P < 0.05). According to the X-ray stage, the patients of DR4+ were more severe than those of DR4- (P < 0.05). HLA-DR4 and DR4 subtype of DRB1 * 0405 were related to the development of RA in Chinese. HLA-DR4 can be a useful prognostic marker in the patients with RA.