Aquaporin-4 (AQP4)

People who are Asian or Pacific Islander and Black are more likely to have neuromyelitis optica spectrum disorder (NMOSD) and test positive for self-reactive antibodies against aquaporin-4 (AQP4) than white people, a U.S.-based study suggests. The prevalence of anti-AQP4 antibody-positive NMOSD was also higher among women and Hispanic people.

Biologic immunosuppressants are more effective than conventional immunosuppressants for people with neuromyelitis optica spectrum disorder (NMSOD) with self-reactive antibodies against the AQP4 protein. That’s according to real-world data from a Japanese study comparing biologic therapies — Soliris (eculizumab), Enspryng (satralizumab), Ultomiris (ravulizumab), Uplizna (inebilizumab), and…

People with neuromyelitis optica spectrum disorder (NMOSD) who test positive for NMOSD-driving self-reactive antibodies against the AQP4 protein and Black patients are significantly more likely to have worse disability related to vision. These are the findings of a North American study that analyzed patient data with NMOSD-specific disability scales…

Early use of immunosuppressive therapy — when compared with a later treatment start — was associated with fewer relapses and reduced disability among neuromyelitis optica spectrum disorder (NMOSD) patients with self-reactive antibodies against the AQP4 protein, a study from China showed. The data demonstrated a time-dependent treatment efficacy, with…

Testing for the self-reactive antibodies that drive most cases of neuromyelitis optica spectrum disorder (NMOSD) in dried blood spots (DBS) is as accurate as testing blood samples, a study shows. The findings suggest the dried blood spot technique could be a viable alternative to conventional blood sample testing for…

A seaweed-derived preparation named GV-971 (sodium oligomannate) that has anti-inflammatory effects through the gut-brain axis, delayed the onset and progression of neuromyelitis optica spectrum disorder (NMOSD) in mouse models of the disease, a study shows. The preparation developed by Green Valley Pharmaceuticals is approved in China as an…

About half of neuromyelitis optica spectrum disorder (NMOSD) patients who test positive for self-reactive antibodies, or autoantibodies, against the AQP4 protein — a hallmark of the autoimmune disease — have at least one other type of autoantibody, according to a new study from South Korea. Many of these other…

The risk of losing income increases dramatically within a few years after the onset of neuromyelitis optica spectrum disorder (NMOSD) in patients positive for antibodies against aquaporin-4 (AQP4), compared with the general population. That’s according to a nationwide study in Denmark that also showed AQP4-related NMOSD was strongly associated…

Age at disease onset and sex ratio — the ratio of males to females — among people with neuromyelitis optica spectrum disorder (NMOSD) are influenced by the proportion of cases with antibodies against aquaporin-4 (AQP4). That’s according to a review study from an international team of researchers that sheds…

Treatment with rituximab significantly reduces the risk of relapse and lessens disability in neuromyelitis optica spectrum disorder (NMOSD) patients with antibodies against aquaporin-4 (AQP4), according to a long-term, retrospective Australian study. Most of the analyzed patients received an initial infusion of rituximab at 1,000 mg, given as two separate…