Researchers have identified characteristics of regulatory T-cells (Tregs) — a family of immune cells that help keep harmful immune reactions in check — that could make it easier to develop targeted treatments for autoimmune conditions like multiple sclerosis (MS). They found that Tregs exist as a common pool that…

In neurological inflammatory conditions like multiple sclerosis (MS), inflammatory immune cells may enter the brain through arachnoid cuff exit (ACE) points — newly discovered structures that normally seem to serve as a type of sewer system in the brain, helping to move out waste. Figuring out exactly how immune…

In a surprise discovery, researchers found that deleting a protein called integrin alpha-3 blocked harmful immune cells from accessing the brain — and prevented the onset of symptoms — in a mouse model of multiple sclerosis (MS). Now, the researchers say that targeting this protein might be one way…

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…

Aubagio (teriflunomide), an approved therapy for relapsing forms of multiple sclerosis (MS), works by shifting the balance between activated subsets of nerve-damaging immune cells to those with immunosuppressive traits, a new study reveals. Further studies to understand how changes in immune cell subsets drive Aubagio’s clinical effectiveness will…

When the immune system launches an attack to fight off infection with the Epstein-Barr virus, immune cells can accidentally end up targeting a protein called CRYAB that’s normally expressed by healthy myelin-making cells in the brain, a study found. The findings provide further evidence that molecular similarities between distinct…

Interleukin-3 (IL-3), an inflammatory signaling protein, seems to coordinate the recruitment of immune cells from the blood into the brain, leading to worsening inflammation and symptoms related to multiple sclerosis (MS), a study revealed. Targeting IL-3-mediated communication may be an effective therapeutic strategy for MS and other brain disorders,…

The body has two distinct lineages of immune cells that can be distinguished by the presence or absence of the vitamin D receptor, a preclinical study reports. The findings shed more light on how vitamin D fine-tunes immune responses and may help researchers better understand the link between vitamin…

Eating too much salt can disrupt the energy metabolism of regulatory T-cells (Tregs), which normally work to control inflammation and fight autoimmunity, prompting them to adopt an inflammatory profile similar to what’s seen in multiple sclerosis (MS) and other autoimmune diseases, a study found. Even a short-term exposure to…

Higher numbers of immune cells circulating in the bloodstream may mean a greater likelihood of developing multiple sclerosis (MS), according to a study based on a large pool of genetic data in people of European ancestry. One particular type of immune cell, called natural killer (NK) cells, was linked…

Molecular “traps” made by neutrophils, a type of white blood cell, to fight bacteria may contribute to the excessive inflammatory activity of T-helper 17 immune T-cells, which are known to play a role in autoimmune diseases like multiple sclerosis (MS). Neutrophils are equipped with a number of biochemical tools…

Treatment with an autologous hematopoietic stem cell transplant (aHSCT) seems to reboot the immune system in multiple sclerosis (MS) patients for at least three years, a small study found. The study, “Sustained immunotolerance in multiple sclerosis after stem cell transplant,” was published in Annals of Clinical and…

A new subset of type 3 innate lymphoid cells (ILC3s) — a type of immune cell known mostly for its anti-inflammatory and immunosuppressive effects in the gut — infiltrates the brain and promotes the abnormal immune attacks that drive multiple sclerosis (MS), according to a study in a mouse model…

Pro-inflammatory T helper 17 cells, known as Th17 cells — a type of immune cell known to play a role in multiple sclerosis (MS) — directly interact with myelin-producing cells, promoting their damage and death, according to a study in a mouse model of MS and in samples from…

Editor’s note: The Multiple Sclerosis News Today team is providing in-depth coverage of the 2021 Virtual AAN Annual Meeting, held April 17–22. Go here to read stories from the conference. After starting treatment with the multiple sclerosis (MS) therapy Mavenclad (cladribine), some types of immune cells are more affected…

Scientists at the UCLA Broad Stem Cell Research Center have developed a technique able to more efficiently isolate specific T-cells — immune cells involved not only in the fight against infections and cancer but also in autoimmune diseases such as multiple sclerosis (MS) — for research. In particular, the…

Scientists have discovered epigenetic changes in a gene called HTR2A, found only in immune cells isolated from people with secondary progressive multiple sclerosis (SPMS), a study reported.  These findings suggest that such changes — external modifications to DNA that turn genes…

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…

A recently identified group of immune cells saved damaged nerve cells from death and promoted nervous system repair, a new study suggests. This finding may represent new promise for treating neurodegenerative diseases such as multiple sclerosis (MS) and amyotrophic lateral sclerosis (ALS). The study, “A new neutrophil…

Scientists developed a new therapy for multiple sclerosis (MS) that prevents immune cells from exiting the lymph nodes and entering the spinal cord of mice with experimental autoimmune encephalomyelitis (EAE) — a condition that mimics MS in humans. The therapy, which consists of a…

AB Science’s lead candidate masitinib safely and effectively delays disability progression in people with primary progressive multiple sclerosis (PPMS) and non-active secondary progressive MS (SPMS), according to top-line data from a clinical trial. The therapy was found to significantly lower the risk of first and confirmed (three-month) disability progression, and to reduce…

Australian scientists have discovered subsets of immune cells that differ between people who have multiple sclerosis (MS) and those who don’t. Because the prevalence of these cells correlates with autoimmune attacks, they represent potential targets for MS therapies. The study, “IgG3 + B…

Using rituximab to prevent multiple sclerosis (MS) in people at risk or in patients still without motor symptoms, and continuing treatment as the disease develops, may be a promising way to avoid inflammation and myelin loss in the brain, a study in mice suggests. In an animal model of MS,…

Scientists have built a map of the toxic immune cells that contribute to neurodegeneration in multiple sclerosis (MS). Their findings may open the door to the development of new medications that protect the brain from the effects brought on by these harmful immune cells. Results were reported in the study,…

A signaling molecule of the immune system called interleukin 13 (IL-13) may modulate the function of key immune cells involved in multiple sclerosis (MS), and their migration through the barrier that protects the brain and spinal cord. IL-13 is an “attractive molecule” and a potential avenue for treating MS,…

A bone marrow transplant can remove the majority of overactive immune T cells from the central nervous system (CNS) in patients with active relapsing-remitting multiple sclerosis (RRMS), allowing the body to replace them with healthy ones, a study has found. This opens up new treatment avenues to…

People with multiple sclerosis (MS) have a more diverse set of immune cells in their cerebrospinal fluid (CSF), the fluid that bathes the central nervous system, but no such diversity is seen in their blood, a study reports. Instead, MS causes changes in the activation of immune cells in…

A signaling protein (Smad7) that usually blocks the activity of a molecule called transforming growth factor-beta (TGF-β) appears to be overactive in people with multiple sclerosis (MS), leading to the activation and migration of immune cells from the intestine to the central nervous system, a study reports. The study,…

A new large-scale genetic map implicates broad immune system dysfunction in patients with multiple sclerosis (MS), suggests a key role of brain immune cells called microglia, and indicates an MS-related gene variant located in the X chromosome. Altogether, the findings — the result of the largest reported study…