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,…
Causes
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…
Mitochondrial abnormalities, or problems in the powerhouses of cells, seem to be a main contributor to the death of important nerve cells in the cerebellum — a brain region involved in motor control — in people with multiple sclerosis (MS), a new study suggests. Researchers found that inflammation and…
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…
People who experience adversity during childhood, such as abuse or neglect, may be at increased risk of multiple sclerosis (MS) and other autoimmune diseases, but available data that supports this association is generally low quality, a study reports. “Drawing concrete treatment recommendations is premature, given the low certainty of…
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 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…
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…
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,”…
Obesity in childhood is associated with a more than double the risk of developing multiple sclerosis (MS) in adulthood, although the overall risk is low, according to a new study. “Our study adds to the evidence that obesity in early life increases the risk for a plethora of diseases…
Getting the Bacillus Calmette-Guerin (BCG) vaccine to protect against tuberculosis (TB) or having latent (inactive) TB in young adulthood aren’t linked to the risk of developing multiple sclerosis (MS), a Norwegian study found. The study, “BCG vaccination and multiple sclerosis risk: A Norwegian cohort study,” was published in…
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…
People with a certain type of genetic makeup who’ve have head trauma may have a risk of developing multiple sclerosis (MS) up to nearly 18 times over those without genetic factors or a history of head trauma, a study shows. “Our study could prompt further research to uncover the…
Genetic changes that predispose people to developing multiple sclerosis (MS) first emerged among herding populations who migrated to Eastern Europe thousands of years ago and then spread across the continent, new research has found. Researchers think these genetic variations may have helped turbocharge the immune system, making it easier…
In people with a family history of multiple sclerosis (MS), exclusive breastfeeding in the first months of life may reduce the risk of developing the disease later on, whereas use of cow’s milk or formula may increase MS risk. That’s according to a new study on the potential impact…
Living with the human immunodeficiency virus (HIV) is linked to a significantly lower rate of developing multiple sclerosis (MS) — including among people exposed to antiretroviral treatment, or medicines that can stop the HIV virus from replicating — a new study found. The rate of MS was particularly reduced…
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…
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…
A blood-clotting protein called fibrin can activate immune cells in the brain and contribute to inflammation and neurodegeneration in multiple sclerosis (MS), a study revealed. Because blood vessels become leaky in neurodegenerative conditions like MS, the blood can cross into the brain, which is known to activate multiple pro-inflammatory…
Disease-associated inflammatory activity of microglia — a type of immune cell with a central role in the development of multiple sclerosis (MS) — is driven in part by molecular mechanisms that are activated when microglia try to clear the corpses of dead myelin-making cells. That’s according to a new…