Anti-AQP4 antibody testing

Being positive for or showing high levels of antibodies against the aquaporin-4 (AQP4) protein at diagnosis doesn’t predict worse outcomes for people with neuromyelitis optica spectrum disorder (NMOSD), according to a small study. Plasma exchange therapy was linked with a trend for slower disability progression, although it wasn’t…

Neutrophils, a set of immune cells, from people with aquaporin-4 (AQP4) antibody-positive neuromyelitis optica spectrum disorder (NMOSD) are resistant to certain forms of cell death, a study found. NMOSD patients also had increased blood levels of molecules that might help neutrophils resist cell death pathways. Similar findings weren’t observed…

Reaching a neuromyelitis optica spectrum disorder (NMOSD) diagnosis in the absence of disease-causing antibodies requires careful attention from physicians in order to ensure timely treatment. That suggestion comes from a case report of a man in Nepal who had symptoms of the autoimmune disease but lacked the antibodies against…

People with neuromyelitis optica spectrum disorder (NMOSD), but lacking anti-AQP4 and anti-MOG antibodies, show no signs of damage to astrocytes — nervous system cells attacked in NMOSD — when compared to those with anti-AQP4 antibodies. Those findings from a recent study suggest that the mechanisms underlying NMOSD symptoms in…

The European Commission has approved Uplizna (inebilizumab-cdon) to treat adults with neuromyelitis optica spectrum disorder (NMOSD) who test positive for antibodies against aquaporin-4 (AQP4-IgG). The approval covers all member states in the European Union, as well as Iceland, Liechtenstein, and Norway. Horizon Therapeutics, the company marketing Uplizna,…

Long-term treatment with Uplizna (inebilizumab-cdon) safely and effectively reduced the frequency of attacks in the 12 neuromyelitis optica spectrum disorder (NMOSD) patients who were negative for antibodies against aquaporin-4 (AQP4) in the N-MOmentum Phase 2/3 trial. Future, appropriately-controlled studies are needed to confirm Uplizna’s benefits in this subgroup…

Using a live cell-based assay to test for the presence of aquaporin-4 antibodies (AQP4-IgG) can accurately identify people who have neuromyelitis optica spectrum disorder (NMOSD), new research suggests. Scientists said the cell-based assay was “a highly specific diagnostic biomarker of NMOSD and did not yield false positive results.” These findings…