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HLA antigens in microscopic polyarteritis (MP) with renal involvement
C Papasteriades1, D Hatziyannakos, M Siakotos
1Department of Immunology and Histocompatibility, Evangelismos Hospital, Athens, Greece.
Abstract:
Serological HLA-A, B, C, DR and DQ typing was performed in 23 patients with microscopic polyarteritis and renal involvement and in 405 healthy individuals, all of Greek origin. An increased frequency of HLA-A26 (26% vs. 11.3%, x2 = 4.423, p < 0.05) and HLA-A11 (26% vs. 9.6%, x2 = 6.825, P < 0.02), and a decreased frequency of HLA-DR3 (4.3% vs. 24.1%, x2 = 5.935, p < 0.025) were found. Five out of six patients, who did not respond to treatment possessed HLA-DR5. These observations suggest that HLA gene products may influence the clinical expression, as well as the outcome of this disease.
Insights
Human Leukocyte Antigen (HLA) gene variants are associated with microscopic polyarteritis. Specific HLA types like HLA-A26 and HLA-A11 showed increased frequency, while HLA-DR3 was decreased in patients, impacting disease outcome.
Area of Science:
- Immunogenetics
- Rheumatology
- Nephrology
Background:
- Microscopic polyarteritis (MPA) is a systemic vasculitis with potential renal involvement.
- The role of Human Leukocyte Antigen (HLA) genes in MPA pathogenesis and prognosis is not fully understood.
Purpose of the Study:
- To investigate the association between specific HLA gene products and MPA in a Greek cohort.
- To explore the potential influence of HLA types on disease expression and treatment response.
Main Methods:
- Serological typing of HLA-A, B, C, DR, and DQ loci was performed.
- A cohort of 23 MPA patients with renal involvement was compared to 405 healthy Greek individuals.
Main Results:
- Increased frequencies of HLA-A26 and HLA-A11 were observed in MPA patients compared to controls.
- A decreased frequency of HLA-DR3 was noted in the patient group.
- Five of six non-responding patients carried the HLA-DR5 allele.
Conclusions:
- HLA gene products may play a role in the susceptibility to microscopic polyarteritis.
- Specific HLA alleles might influence the clinical presentation and treatment outcomes in MPA patients.