Causes

Under normal circumstances, immune B-cells train T-cells, another type of immune cell, on which targets not to attack, preventing the development of neuromyelitis optica spectrum disorder (NMOSD), according to a study in mice. This training occurs in the thymus gland, a small organ behind the breastbone that works as…

A new study of disease prevalence estimates that about 22,000 people in the U.S. were living with neuromyelitis optica spectrum disorder (NMOSD) in 2022. The findings also suggest that the progressive autoimmune disease is most common in Black women, as compared with other U.S. demographics. For Asian American women,…

People who develop neuromyelitis optica spectrum disorder (NMOSD) at an older age are more likely to experience spinal cord inflammation and less likely to have eye nerve involvement, not only in the first attack but also in subsequent relapses, a study has found. In addition, data show “different relapse…

Certain long non-coding RNAs (lncRNAs) — a family of molecules that can regulate gene activity — tied to immune function were at significantly higher levels in the blood of people with neuromyelitis optica spectrum disorder (NMOSD) compared with the general population, a study reports. All four evaluated markers —…

Blood levels of prolactin, a hormone mostly known for its role in milk production, are significantly elevated in people with neuromyelitis optica spectrum disorder (NMOSD) as compared with healthy adults, a study found. Among NMOSD patients, these high prolactin levels were significantly associated with active disease, sensory-related symptoms, and…

Genetic variations linked with cold sores and shingles infections have been associated with the development of AQP4 antibody-positive neuromyelitis optica spectrum disorder (NMOSD), according to genetic analysis. The findings suggest that the herpes simplex virus, which is the cause of cold sores, and the varicella-zoster virus, which leads to…

When the immune system launches an attack to fight off a cytomegalovirus infection, immune cells may accidentally target aquaporin-4 (AQP4), a protein found at the surface of neuron-supporting cells. That’s the hypothesis suggested by researchers who analyzed the immune cell receptors of people with and without neuromyelitis optica spectrum…

CCL2, a signaling protein that recruits immune cells to sites of injury, may play a key role in driving the nerve damage that results from antibodies against the aquaporin-4 (AQP4) protein in neuromyelitis optica spectrum disorder (NMOSD), a study suggests. The signaling protein was found to be elevated in…

Familial clustering of neuromyelitis optica spectrum disorders (NMOSD) — having more cases within families than what would be expected — is more common than originally thought. That’s according to a new study whose findings highlight a complex genetic predisposition to the progressive autoimmune disease. Certain DNA variants were shared…

Neuromyelitis optica spectrum disorder (NMOSD) may begin to manifest as uncontrollable nausea, vomiting, or hiccups — a condition referred to as area postrema syndrome (APS) — as described in a report of four patients in China. Because these symptoms can overlap with those of other diseases, their occurrence…