Inflammatory gut bacteria that carry proteins structurally similar to myelin, a protective layer surrounding nerve fibers that is damaged in multiple sclerosis (MS), may trigger the development and progression of the disease, according to a new study done in mouse models. The findings may pave the way toward new…
Causes
People exposed to higher levels of certain manufactured compounds that persist in the environment are more likely to be diagnosed with multiple sclerosis (MS), a new study reports. A higher MS risk was associated with elevated levels of PFAS, also known as “forever chemicals,” and specific metabolites of PCBs,…
Children with multiple sclerosis (MS) who have more paramagnetic rim lesions (PRLs) — areas of chronic active inflammation seen on MRI scans — tend to lose more brain volume over time, a new study found. These lesions were common in pediatric MS, a rare form of the disease…
A common virus that causes cold sores, herpes simplex virus type 1 (HSV-1), may contribute to multiple sclerosis (MS). That’s according to a study by researchers at the University of Illinois Chicago (UIC). In mice lacking a protein that helps control HSV-1, infection led to the degradation of the…
Infections and stressful life events in childhood may increase the risk of developing multiple sclerosis (MS), while childhood exercise is associated with lower MS risk, according to a study. The findings, part of the German National Cohort (NAKO) population study, imply that programs to encourage physical activity and prevent…
The Epstein-Barr virus (EBV) — a well-established risk factor for multiple sclerosis (MS) — is able to alter the movements of infected immune cells, a new study reveals. The findings shed new light on how EBV may set the stage for MS to develop, and could potentially form…
The thyroid hormone thyroxine, or FT4, may play an indirect role in the development of multiple sclerosis (MS), which seems to be mediated by certain immune cells, a study suggests. “Future investigations should explore how these immune cells modulate MS onset and progression in the context of thyroid…
The risk of multiple sclerosis (MS) is significantly higher in people who carry a variant of the HLA gene called HLA-E*01:01 and have a history of infectious mononucleosis (mono), the manifestation of an Epstein-Barr virus (EBV) infection, according to a study based on U.K. Biobank data. The higher…
A group of manufactured chemicals called hydroxylated polychlorinated biphenyls, or OH-PCBs, which persist in the environment despite a ban on production, are associated with an increased risk of developing multiple sclerosis (MS), according to a new study. In turn, another family of compounds highly resistant to environmental breakdown, called…
In the lymph nodes of the neck of people with multiple sclerosis (MS), certain immune cells show abnormalities in activity and signs of reactions against the Epstein-Barr virus (EBV), a new study reports. The findings may help to explain the connection between MS and EBV, researchers said. The study,…
Antibodies against a protein found in neurons and in nerve supporting cells, may play a role in driving multiple sclerosis (MS), a study indicates. Researchers examined immune responses against more than 23,000 human proteins, and the MLC1 protein emerged as one of the top hit proteins targeted by immune…
Children with multiple sclerosis (MS) who were exposed to sunlight for at least half an hour per day during the first summer of life tend to have less disease relapses than those who received less sun exposure during that period, a study found. The risk of relapse was also…
Severe obesity during childhood and adolescence more than triples the risk of developing multiple sclerosis (MS), and losing weight through early lifestyle changes did not decrease the likelihood of MS, according to a nationwide study in Sweden. Although the overall risk remained low, with 0.13% of people…
Children with multiple sclerosis (MS) who come from poorer families or other disadvantageous circumstances tend to have more inflammation and irreversible brain tissue loss, a new study reports. “Our findings suggest that social disadvantage in childhood can have lasting effects on MS severity,” Kimberly A. O’Neill, MD, study coauthor…
By studying pairs of identical twins, researchers have identified a population of immune cells whose early activation and migration into the brain might contribute to multiple sclerosis (MS) onset. MS patients showed an altered profile of a population of immune cells called CD8 T-cells in the blood relative to…
Having antibodies against the rubella virus is associated with an increased risk of developing multiple sclerosis (MS) in unvaccinated people, a Swedish study suggests. The findings show a rubella infection may be a risk factor for MS, reinforcing the hypothesis that certain viral infections may trigger the misleading immune…
Obesity promotes molecular signatures associated with more inflammation and multiple sclerosis (MS) signaling pathways specifically in females, which may explain the link between obesity and a higher risk of MS in women. These are the findings of a new study analyzing data not only from obese and non-obese women…
Among immigrants to Canada, the risk of multiple sclerosis (MS) is higher for those who have spent a greater portion of their life in Canada, a new study reports. The study, “Proportion of Life Spent in Canada and the Incidence of Multiple Sclerosis in Permanent Immigrants,”…
There’s no evidence to suggest that multiple sclerosis (MS) directly causes most cancers, but having the condition may marginally increase the likelihood of developing cervical cancer, according to a new study from China. That study found “no causal relationship between MS and 15 types of cancers except cervical cancer,”…
Two types of chemicals in household disinfectants and furniture can disrupt the development of oligodendrocytes, the brain cells chiefly responsible for making myelin, a new study shows. The finding suggests that exposure to these chemicals may be a risk factor for disorders related to myelin such as…
A subset of astrocytes — a type of support cell for the central nervous system — has a form of immune-related memory that might contribute to a worsening of multiple sclerosis (MS), according to recent research. Much like immune cells, these astrocytes can remember inflammatory stimuli that they previously have…
Sweden has a consistently high incidence and prevalence of pediatric-onset multiple sclerosis (PoMS), according to a recently published study. Incidence measures the number of new cases identified during a certain period, while prevalence measures the proportion of people in the population with the condition. Data show the disease is…
Natural killer (NK) cells, a type of immune cell, are critical for preventing an immune response against an infecting virus from triggering multiple sclerosis (MS), a new study shows. “Our study demonstrates that the main protective factors against MS are distinct cytotoxic [cell-killing] NK cell responses,” the researchers wrote…
The European Union (EU) is providing 7.1 million euros (about $7.6 million) over five years to a global interdisciplinary consortium that seeks to identify the causes of multiple sclerosis (MS) — with a particular focus on viruses — and find new treatments for the disease. The “BEHIND MS”…
Women who smoked during pregnancy, and their offspring, showed a significantly higher risk of developing multiple sclerosis (MS) in a recent Danish study. “Our observations add further to the evidence implicating smoking in the development of MS and suggest that intra-uterine exposure to tobacco smoke may increase MS risk,”…
Infection with a herpes virus known as HHV-6A is associated with significantly higher levels of the nerve damage biomarker neurofilament light chain (NfL) in the years leading up to multiple sclerosis (MS), a study suggests. “In blood samples from individuals who later developed MS, we could see that antibodies…
Infection with the Epstein-Barr virus (EBV) may prime the immune system to accidentally attack a brain protein called ANO2, new research shows. The findings may explain how EBV infection can lead to developing multiple sclerosis (MS), at least in some patients. Daniel Jons, PhD, a scientist at the…
Researchers have shed new light on the molecular mechanisms that help immune cells get into the brain to drive inflammation in multiple sclerosis (MS). Two proteins called MMP-9 and MMP-2 were found to break down some components of the barrier that keeps immune cells out of the brain, helping…
Pro-inflammatory immune cells that can target the brain may be activated in a specific region of the intestine by certain gut bacteria before migrating to the brain, according to a new study done in mice. Researchers say these findings provide a proof of concept for how some immune cells may…
Inflammation in the membranes around the brain may trigger an inflammatory response that can spread into nearby brain tissue, a new study in a mouse model of multiple sclerosis (MS) shows. Researchers say these findings may help to advance scientists’ understanding of the mechanisms that underlie brain damage in…