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Combining two diagnostic systems used to classify cases of ANCA-associated vasculitis (AAV) in adults improved classification performance in a pediatric AAV patient population, according to a study in China. Identifying types of AAV is important to ensure effective clinical care in children, researchers noted. “Considering that distinct clinical…

Alivedx’s Mosaiq Aiplex vasculitis assay, a platform test for the two main self-reactive antibodies that drive most cases of ANCA-associated vasculitis (AAV), is now available for clinical use in the European Union (EU). The test is also able to detect self-reactive antibodies linked to another autoimmune condition marked…

Measuring circulating microRNAs — short RNA molecules that ultimately suppress gene activity — could offer doctors a less invasive way to monitor glomerulonephritis, a type of kidney inflammation, in ANCA-associated vasculitis (AAV), a study found. However, the study included a small number of patients, and testing microRNAs, or miRNAs,…

In ANCA-associated vasculitis (AAV), the involvement of the central nervous system (CNS), that is, the brain and spinal cord, is uncommon, but other factors may mimic CNS involvement, a study reports. These so-called mimickers can include AAV disease processes not related to the CNS, other conditions, and drug-related adverse…

Treatment with the immunosuppressants cyclophosphamide, azathioprine, or rituximab after ANCA-associated vasculitis (AAV) patients have experienced a brain bleed, or intracranial hemorrhage, is linked to better survival, according to a review of previously reported cases. “In our pooled analysis, we found that initiating [immunosuppressant] treatment after [brain bleeds] … was…

People with ANCA-associated vasculitis (AAV) affecting the kidneys who receive kidney transplants face higher long-term risks of transplant failure and death compared with those who undergo transplants for other reasons. That’s according to a study from France, which also found that the presence of ANCAs — self-reactive antibodies that…

Note: This story was updated on Aug. 6, 2025, to correct that proteinase 3 (PR3) and myeloperoxidase (MPO) are the enzymes targeted by AAV-causing antibodies. People with anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis have elevated levels of certain immune-related proteins in their blood, a new study from Sweden reports. However, different…

Long-term treatment with Nucala (mepolizumab) is safe and effective in people with eosinophilic granulomatosis with polyangiitis (EGPA), the rarest type of ANCA-associated vasculitis (AAV), according to a meta-analysis of eight studies. After nearly two years of treatment, more than half of EGPA patients achieved remission, meaning they had…

Ratios of different kinds of blood cells, reflecting inflammation and immune activity, may be a cheap and efficient tool to aid in the diagnosis of ANCA-associated vasculitis (AAV), and in predicting disease activity, a new study from China reports. “While not standalone diagnostic tools, these markers offer valuable support…

Some people with ANCA-associated vasculitis (AAV) have elevated biomarkers suggesting activation of the immune system’s complement cascade, which is known to contribute to AAV, even when they’re in disease remission, a study showed. While these biomarkers did not appear to be associated with an increased risk of future disease…