risk factor

Elevated levels of two bacterial strains from the Lachnospiraceae family in the gut may be a key risk factor for multiple sclerosis (MS), according to a study. The study, “Multiple sclerosis and gut microbiota: Lachnospiraceae from the ileum of MS twins trigger MS-like disease in germfree…

The use of obesity medications — approved drugs for treating diabetes and promoting weight loss — is associated with a reduced chance of developing multiple sclerosis (MS), according to real-world data from the U.S. Food and Drug Administration (FDA), a study found. In particular, medicines that activate a receptor…

In people with relapsing forms of multiple sclerosis (MS), relapses that occur in the first few years after the disease develops have a strong impact on rates of disability worsening — but after about 2.5 years, more relapses don’t consistently result in a greater worsening of disability, according to…

People with multiple sclerosis and a history of chronic opioid use are nearly 200 times more likely to use prescription opioids persistently, according to a study involving nearly 15,000 U.S. military veterans living with the neurodegenerative condition. A history of pain, paralysis, post-traumatic stress disorder, or living in a…

People who had infectious mononucleosis — a contagious disease for which the Epstein-Barr virus (EBV) is the leading cause — had a higher incidence of multiple sclerosis (MS) in the 10 years following diagnosis compared with individuals not diagnosed with the virus, a study found. This link was particularly…

Fully vaccinated multiple sclerosis (MS) patients who are treated with Ocrevus (ocrelizumab) or Gilenya (fingolimod) have a significantly higher risk of COVID-19 infection than those given other immunosuppressive therapies, according to a study in Italy. Called breakthrough infections, these post-vaccination cases of SARS-CoV-2 — the virus that causes…

Toxoplasmosis, an infection by the parasite Toxoplasma gondii, has a protective effect against the development of multiple sclerosis (MS), according to a review study. Specifically, people who had been infected with the parasite were 32% less likely to develop MS than those who never had toxoplasmosis. While these findings support T. gondii…

Women with multiple sclerosis (MS), and people who stay in a relapsing stage or use disease-modifying therapies (DMTs) for longer periods are less likely to transition to secondary progressive multiple sclerosis (SPMS) than others, according to a study based on the Italian MS registry. But patients whose…

Vaccines are not a risk factor for multiple sclerosis (MS), a large data analysis spanning more than 12,250 MS patients in Germany shows. Fewer vaccinations were given to people who — five years later — would be diagnosed with MS, compared to those who would be diagnosed with…

Obesity may increase the risk for the development and progression of multiple sclerosis (MS) in children and teens, and it may prevent first-line MS therapies from working. Those findings were reported in the study “Association of Obesity With Multiple Sclerosis Risk and Response to First-line Disease…

A study found no genetic risk factors associated with vitamin D in families with a history of multiple sclerosis (MS), suggesting that the link between vitamin D deficiency and MS risk is determined by environmental factors rather than a genetic predisposition. The study “Exonic variants of genes related…

Stress-induced changes in gut bacteria, or gut microbiota, may play a significant part in the possible link between exposure to stress and the risk of autoimmune disorders such as multiple sclerosis (MS), a mouse research study says. In the study “…

Protecting the public against an outbreak like the swine flu using GlaxoSmithKline‘s vaccine Arepanrix — or a similar vaccine with an AS03 adjuvant delivery system — does not increase a risk of multiple sclerosis (MS), a population study conducted in Canada reports. The study, “Registry Cohort Study to Determine Risk…

Greater exposure to sunlight during the winter months — part of a person’s lifetime exposure to ultraviolet radiation — can help to lower the risk of multiple sclerosis (MS), a large U.S. cohort study suggests. The study, “Lifetime exposure to ultraviolet radiation and the risk of multiple sclerosis in…

Scientists have uncovered the molecular mechanism by which the genetic variant HLA-DRB1*15:01 is the strongest risk factor for multiple sclerosis, new research shows. Analyzing several studies, researchers found that the risk linked…

Results from a small pilot study indicated that high-dose vitamin D supplementation is safe and tolerable in patients with multiple sclerosis (MS), and that it can reduce the presence of autoimmunity-causing immune T cells. Patients are now being recruited for a larger clinical trial. The study, entitled “Safety and immunologic…