Marisa Wexler, MS, senior science writer —

Muscle biopsies could be used to diagnose ANCA-associated vasculitis (AAV), a new study indicates. The finding suggests that such biopsies are most informative in females or in people with certain inflammation-related conditions. The study, “Muscle biopsy in anti-neutrophil cytoplasmic antibody–associated vasculitis: diagnostic yield depends on anti-neutrophil…

Extracellular vesicles, or the tiny membrane-bound particles that are released from cells, could be used as a blood biomarker of disease activity in people with ANCA-associated vasculitis (AAV), a new study suggests. The study, “Microparticles expressing myeloperoxidase as potential biomarkers in anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides…

The complement system, a part of the immune system, is overactive in people with active ANCA-associated vasculitis (AAV), but achieving remission appears to lower most of its components to normal levels, a study reports. The study, “The alternative complement pathway in ANCA‐associated vasculitis: further evidence…

The presence of detectable ANCA antibodies and B-cells after initial treatment with rituximab — used to induce remission in people with ANCA-associated vasculitis (AAV) — predicts a greater risk of relapse, a new study shows. The study, “Proteinase-3-anti-neutrophil cytoplasmic antibodies (PR3-ANCAs) predict relapses…

The complement system, a component of the immune system, is overactive in people with necrotizing glomerulonephritis, or inflammation in the tiny blood vessels of the kidneys, caused by ANCA-associated vasculitis (AAV), a study reports. Some complement proteins seem to correlate with more severe kidney disease in these…

Fingolimod (FTY720), a medication used to treat multiple sclerosis, also appears to ease many of the symptoms of ANCA-associated vasculitis (AAV), a new study in rats suggests. The study, “Sphingosine-1-phosphate receptor modulator FTY720 attenuates experimental myeloperoxidase-ANCA vasculitis in a T cell-dependent manner,” was published…

Clinical trials testing new treatments for people with ANCA-associated vasculitis (AAV) need more uniformity in the patients they recruit and in the outcome measures used for efficacy assessments, a new review indicates. The review, “Randomized clinical trials in ANCA-associated vasculitis: a systematic analysis of the WHO…

People with ANCA-associated vasculitis (AAV) who have kidney involvement when they are diagnosed are more likely to experience major kidney relapses later, a new study shows. The study also indicates that induction treatment with cyclophosphamide and/or rituximab can protect against these relapses. Titled “Renal involvement…

Guidelines for using rituximab as a maintenance therapy in adults with ANCA-associated vasculitis (AAV) were recently published that, in addition to helping physicians with treatment approaches, highlight areas where more research is needed. “Rituximab for maintenance of remission in ANCA-associated vasculitis: expert consensus guidelines,” was…

Continuing maintenance treatment with rituximab for long periods increases the likelihood that people with ANCA-associated vasculitis (AAV) remain in remission, without increasing the incidence or severity of adverse events, findings from a Phase 3 trial show. The study, “Long-Term Rituximab Use to Maintain Remission of…