Causes

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…

A new research project will seek to understand the development of immune cells that drive autoimmune diseases such as multiple sclerosis (MS). The project will be led by Leszek Ignatowicz, PhD, a professor in the Institute for Biomedical Sciences at Georgia State University, and will be funded by…

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…

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, “…

Using brain tissue from people with multiple sclerosis (MS) and mouse models of MS, scientists identified a key pathway that drives astrocytes to promote inflammation in the brain and spinal cord. The study, “MAFG-driven astrocytes promote CNS inflammation” published in the journal Nature, uncovered potential therapeutic targets that may be…

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.

People living close to major roads or highways are at a greater risk of multiple sclerosis (MS), a database study of people in metropolitan Vancouver reports. Parks and other green spaces in urban areas that might lower exposure to air pollutants did not affect a person’s overall risk of developing MS,…

Processes related to metabolism in brain cells known as astrocytes may be at the origin of multiple sclerosis (MS), particularly underlying the inflammation and damage to the nervous system seen in progressive disease, a study in mice found.

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…

A specific type of immune cell in a particular activation state is linked to such immune diseases as multiple sclerosis (MS) and inflammatory bowel disease (IBD), a collaborative research study found. Disease-associated genetic variants — changes in DNA sequences or mutations in genes — can affect the response of immune…

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…

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…

Scientists identified and “fingerprinted” a group of T-helper cells that are unusually numerous in the blood and central nervous system of people with relapsing-remitting multiple sclerosis (RRMS), and may be the reason behind the neuroinflammation seen in these patients. This T-cell population carries specific markers involved in the transmission…

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…

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…

Reactivation of ancient viruses incorporated into the human genome in the course of evolution may be involved in the acute inflammatory response that is characteristic of multiple sclerosis (MS), a study says. The findings of the study, “Expression of endogenous retroviruses reflects increased usage of atypical enhancers in…

As strange as it is to think about, many bacteria live in the human body, most of which are found in the gut (often referred to as the gut microbiome). These bodily roommates affect health in many ways that are only beginning to be understood. …

Early-life use of antibiotics disrupts gut microbiota in a rat model of multiple sclerosis (MS) and provokes nervous system autoimmunity, ultimately aggravating disease severity, new research shows. Results also indicate early-life antibiotic use may have unfavorable consequences on regulation of the immune system. The research article, “…

Editor’s note: “Need to Know” is a series inspired by common forum questions and comments from readers. Have a comment or question about multiple sclerosis? Visit our forum. This week’s question is inspired by the forum topic “Can there be a connection between Epstein-Barr virus…

The herbicide linuron, commonly used with other herbicides, insecticides and fungicides to control the growth of grass and weeds, may be an important environmental risk factor in the development of neurological diseases that include multiple sclerosis, researchers suggest. Used in the U.S. and other countries — but recently…

The cells that produce myelin in the brain and spinal cord, called oligodendrocytes, may play an active role in the onset or progression of multiple sclerosis (MS), according to a study combining data from MS mouse models and the human brain. This discovery supports the…

Bacteria that reside in human gut may trigger autoimmune reactions by producing human-like proteins that mimic a naturally occurring and crucial cell protein. Researchers at Queen’s University Belfast in Ireland report that patients with autoimmune disorders — such as multiple sclerosis (MS), rheumatoid arthritis, and ulcerative colitis — have…

Children exposed to certain air pollutants in urban areas or some household chemicals are at higher risk of developing multiple sclerosis (MS) during childhood or adolescence, two new research studies suggest. The studies “Urban air quality and associations with pediatric multiple sclerosis” and…

Infections and complications from severe disability are the greatest contributors to mortality among multiple sclerosis (MS) patients, according to a population-based study in British Columbia, Canada, which also found that that MS is a more common underlying cause of death among younger patients. The study, “Causes that…