Causes

The pro-inflammatory environment characteristic of multiple sclerosis (MS) reduces the levels of PPAR-gamma — a receptor protein whose activation dampens inflammation — and impairs myelin processing in immune cells that clear myelin debris, a study suggests. These findings may help to better understand how PPAR-gamma regulates the function of these…

Exposure to stress before birth can worsen the clinical symptoms of multiple sclerosis (MS) during adulthood, a study in a mouse model of MS suggested. Investigators also found that prenatal stress can change the levels of a protein critical for neurological development, called…

Exposure to air pollution, particularly to particulate matter 10 (PM10), small airborne and inhalable particles, may trigger inflammatory reactions in people with multiple sclerosis (MS), an Italian study reported. The study “Air pollution as a contributor to the inflammatory activity of multiple sclerosis” was published in the Journal of…

A newly identified population of immune cells contributes to inflammation in multiple sclerosis (MS), a new study suggests. The study, “A distinct GM-CSF+ T helper cell subset requires T-bet to adopt a TH1 phenotype and promote neuroinflammation,” was published in Science Immunology. MS is an…

The HLA-DR15 haplotype — a set of gene variants that tend to be inherited together — in the HLA-DRB1 gene plays a role in autoimmune response and, in combination with environmental factors, contributes to the development of multiple sclerosis (MS), a study suggests. The study, “…

Two specific bacteria present together in the gut led to more immune attacks on myelin and harsher symptoms in a mouse model of multiple sclerosis (MS). These findings add to existing evidence supporting the link between gut microbiota and MS, and highlight the need to consider potential combined effects of these…

The number of new cases of multiple sclerosis (MS) possibly due to obesity in childhood and adolescence could rise by  14% in the U.S. over the next 15 years, and by 10% in the U.K., a study reported. While the worldwide risk of MS linked to obesity in early life…

Cigarette smoking and an Epstein–Barr virus infection together represent a significant risk factor for multiple sclerosis (MS), suggesting that at least one path to this disease involves two factors working synergistically, a study reports. The study, “Smoking and Epstein–Barr virus infection in multiple sclerosis development,” was published…

Editor’s note: “Need to Know” is a series inspired by common forum questions and comments from readers. Have a comment or question about MS? Visit our forum. This week’s question is inspired by the forum post “From Sun to Salt: Growing Role of Environment in MS,” published on…

Exposure to air pollutants, particularly to fine particle pollutants (2.5 micrometers or less in diameter), seems to increase a person’s risk of multiple sclerosis (MS), a study from northern Italy suggests. It found that people living in urban, more polluted areas have a 16% higher relative risk  of developing this…

People with multiple sclerosis (MS) and other neurological diseases have a significantly higher aluminum content in their brains than those with no known neurological impairment and no identifiable neurodegenerative disease, a recent study found. The research further supports a role of aluminum in the development of these brain conditions,…

More support has been added to the belief that a link exists between the Epstein-Barr virus (EBV) and multiple sclerosis (MS). Epstein-Barr is one of the most common viruses, and most people become infected with it at some point in their lives. Frequently, it appears in childhood as…

Supporting evidence that infection with Epstein-Barr virus (EBV) could be one of the root causes of multiple sclerosis (MS), a recent study found all of its 901 early disease patients carry antibodies against this virus, meaning that all are or have been exposed to it. The study, “…

Scientists have identified a link between systemic inflammation and fat (lipid) metabolism that may underlie the increased risk of cardiovascular disease in people with multiple sclerosis (MS). The study with that finding, “Lipoprotein profiling in early…

People exposed to secondhand cigarette smoke during adolescence may be more likely to develop multiple sclerosis (MS) later in life, a study suggests. The study, “Exposure to passive smoking during adolescence is associated with an increased risk of developing multiple sclerosis,” was published in the Multiple…

A protein called dedicator of cytokinesis 8 (DOCK8) is key for the development and expansion of self-reactive immune T-cells that wrongly attack myelin, a study in a mouse model of multiple sclerosis (MS) found. DOCK8 drives the migration and stimulating capacity of dendritic cells — immune cells that ‘teach’…

Editor’s note: “Need to Know” is a series inspired by common forum questions and comments from readers. Have a comment or question about MS? Visit our forums. This week’s question is inspired by the forum topic “Do you have mood swings? What helps?” from Nov. 27, 2018. Do you…

The medical profession must be sick and tired of patients diagnosing themselves via the wonders of the internet. But as a patient who’s sick and tired, you eventually have to. Medicine is full of orthodoxies that are incredibly hard to shake. When you find yourself at the edge of these…

Editor’s note: “Need to Know” is a series inspired by common forum questions and comments from readers. Have a comment or question about MS? Visit our forum. This week’s question is inspired by “Newly Diagnosed MS Patients Show Changes in Gut Microbiome, Study Says,” from Dec. 3, 2019.

Epstein-Barr Virus and Certain Genes Interact in Ways That Can Promote MS, Study Finds Much has been written over the years about a possible connection between the Epstein-Barr virus and multiple sclerosis. Here’s further evidence of a link that has to do with how particular genes interact with the…

Multiple sclerosis (MS) is an autoimmune disease in which the immune system mistakenly attacks the protective coating that surrounds nerve fibers and helps them function. Damage to this protective coating, called myelin, means the nerve fibers are fragile and easily damaged. MS in children, or pediatric MS, is…

A cluster of immune-related genes located in the X chromosome are more active in the X chromosome inherited from the mother than in the one from the father, a new mouse study shows. These findings may help explain why women have higher rates of autoimmune diseases, such as multiple…

Combining data science, artificial intelligence (AI), and machine learning to better identify patterns that may underlie the cause or causes of multiple sclerosis (MS) is the focus of a novel partnership. Despite numerous advances in MS research and treatments, what causes the disease is still unknown. “Given the complexity…

Human herpesvirus 6A (HHV-6A), but not a widespread variant of the virus called HHV-6B, could be one of the root causes of multiple sclerosis (MS), new research suggests. Compared to healthy people, those with MS show greater numbers of antibodies to HHV-6A viruses, reflecting greater exposure to…

Infection with the human herpesvirus (HHV)-6A may increase the likelihood of having multiple sclerosis (MS), according to a new national study in Sweden. The research, “Serological response against HHV-6A is associated with increased risk for multiple sclerosis,” was presented by Anna Fogdell-Hahn, PhD, associate professor at the…

The complexity in underlying mechanisms, a lack of representative research models, and inconsistent criteria defining therapeutic benefit are the main reasons why an effective therapy for progressive forms of multiple sclerosis (MS) is still lacking, researchers maintain in a review study. Nevertheless, as research continues to shed light on…

An ongoing experiment at the International Space Station may help identify triggers for multiple sclerosis (MS) and Parkinson’s disease by studying how nerve cells and immune cells interact when exposed to microgravity. Using patient-derived cells, researchers will study the way nerve cells grow, survive, and change their gene…

Projection neurons, a specific type of nerve cell, are prone to damage in the brain of people with multiple sclerosis (MS), and could be at the root of brain atrophy (shrinkage) and the cognitive changes seen in patients. Looking at individual cells in the brain, scientists found…

A mismatch — between the ancestral immune function changes induced by the placenta and fewer modern-day pregnancies — may help explain the greater risk for multiple sclerosis (MS) and other autoimmune diseases in women in industrialized societies, according to a new study. The shift toward a sedentary lifestyle may…

Scientists are zeroing in on mutations in a few genes that appear to be major risk factors for developing multiple sclerosis (MS). The results of their research suggest there are common biological pathways that cause the disease. The study, “Exome sequencing in multiple sclerosis families identifies 12…