Autoimmune diseases-related arthritis in HIV-infected patients in the era of highly active antiretroviral therapy

BackgroundAutoimmune diseases-related arthritis has been rarely reported in HIV-1-infected patients. We aimed to investigate the incidence and clinical manifestations of autoimmune diseases-related arthritis in HIV-infected patients in the era of highly active antiretroviral therapy (HAART) in Taiwan.MethodsWe retrospectively reviewed medical records of all HIV-infected patients who had a diagnosis of autoimmune arthritis between 1993 and 2013. Demographic characteristics, clinical manifestations, serial CD4 and CD8 lymphocyte counts and plasma HIV viral loads, HLA-B27 status, and treatment response to HIV and rheumatic diseases were recorded.ResultsDuring the 20-year study period, totally 26 HIV-infected patients with autoimmune arthritis (0.7%) were diagnosed among 3623 HIV-infected patients. There were 18 patients with ankylosing spondylitis (AS), six with rheumatoid arthritis (RA), one with psoriatic arthritis, and one with Sjögren's syndrome. HLA-B27 antigens were all detected positive of AS patients. Fifteen patients (57.7%) developed autoimmune arthritis after HAART was initiated. The median age and CD4+ T lymphocyte counts at the diagnosis of autoimmune arthritis were 35 (20–62 years) and 406 (3–695 cells/μL), respectively. Three patients had typical presentations of Reiter's syndrome. Both AS and RA patients achieved a good virological response with undetectable plasma HIV RNA load 12 months after receiving HAART(85.71% vs. 80%, respectively, p = 0.999). The treatment response to antirheumatic medications were similar between AS patients and RA patients (77.8% vs. 50%, p = 0.3068), but seems to be better than that reported for the general population (30–40%).ConclusionA low prevalence of autoimmune arthritis among HIV-infected patients in the era of HAART was similar to that of the general Taiwanese population. Clinical manifestations of HIV-infected patients were similar to those described in HIV-uninfected patients. However, the treatment response to antirheumatic agents was better in HIV-infected patients in our study.