Tregs

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…

While regulatory T-cells (Tregs) are able to promote remyelination — the repair of the myelin sheath that’s damaged in multiple sclerosis (MS) — this ability declines significantly with age, a new study shows. Based on the findings, researchers have identified molecular targets that may boost the myelin-repairing features…

The Polish biotechnology company PolTREG plans to launch Phase 2 trials testing its Tregs therapy — the T-cell-based treatment PTG-007 — in people with multiple sclerosis (MS) in Poland later this year. The biotech company has earned a Current Good Manufacturing Practice (CGMP) certification for its new manufacturing…

Microparticles that activate regulatory T-cells, or Tregs, an immune cell type with anti-inflammatory properties, reversed the accumulation of physical disability due to multiple sclerosis (MS) in a mouse model of the neurodegenerative disorder, a new study shows. Use of the novel strategy even cured some of the animals. “We…

Treatment with berberine, a compound found in many plants, eased disease severity and showed anti-inflammatory effects in a mouse model of multiple sclerosis (MS), a new study reports. “These results confirmed that treatment with berberine efficiently improved the disease in the animal model of MS,” the researchers wrote, noting…

A protein called nephronectin mediates autoimmunity in a mouse model of multiple sclerosis (MS), and blocking this protein was found to prevent disease progression and processes that drive T-cells toward an inflammatory state, researchers reported. Study findings support nephronectin, a protein involved in kidney development, as a promising treatment…

Removing an ion channel called Piezo1 from immune T-cells lessened disease severity in a mouse model of multiple sclerosis (MS), a study showed. Notably, these beneficial effects were associated with an expansion of regulatory T-cells (Tregs) — a type of immune cell that typically dampens immune and inflammatory responses —…

Abata Therapeutics has opened with $95 million in financing, and plans to use regulatory T-cells to treat autoimmune and inflammatory diseases, starting with progressive forms of multiple sclerosis (MS). Money raised will be used to support work for three clinical trials it plans to initiate in 2025, including…

Editor’s note: The Multiple Sclerosis News Today news team is providing in-depth and unparalleled coverage of the virtual ACTRIMS Forum 2021, Feb. 25–27. Go here to see all the latest stories from the conference. The fat-related hormone leptin has pro-inflammatory effects on immune cells, new data show, findings that help in better…

Editor’s note: The Multiple Sclerosis News Today news team is providing in-depth and unparalleled coverage of the virtual ACTRIMS Forum 2021, Feb. 25–27. Go here to see the latest stories from the conference. Regulatory immune cells expressing the melanoma cell adhesion molecule (MCAM) dampen inflammation at sites of nerve damage in…

Using a small molecule called TEPP-46 to block the non-metabolic function of the enzyme pyruvate kinase M2 (PKM2) in T-helper (Th) immune cells did not lessen disease severity and redirected inflammation and neural damage from the spinal cord to the brain in a mouse model of multiple sclerosis…

Regulatory T-cells (Tregs) — immune cells that normally dampen immune and inflammatory responses by inhibiting the activity of pro-inflammatory immune cells — enabled mice in a model of multiple sclerosis to partly recover from limb and tail paralysis, scientists reported. Tregs can do this by preventing a subtype of…

A person infected through the skin by the hookworm Necator americanus shows a spike in  regulatory T-cells, specialized immune T-cells that work to limit inflammation, and a controlled infection by these generally safe worms may benefit some relapsing multiple sclerosis (MS) patients, research suggests. “The…

A short-chain fatty acid produced by gut bacteria helps to counteract inflammatory responses in multiple sclerosis (MS) by promoting greater numbers of regulatory immune cells, a study reports. But the bacterial composition of the gut (its microbiome) of MS patients is deficient in bacteria that produce this acid —…

Modulating the bacteria that reside in the gut by treating multiple sclerosis (MS) patients with probiotics, fecal transplants, or gut-related microRNAs may help to ease inflammation and disease severity, researchers with Brigham and Women’s Hospital suggest. Howard Weiner, MD, a group leader at the hospital, presented his team’s findings on…

Immune system cells can either trigger or suppress inflammation by controlling mitochondrial respiration — the process that occurs in mitochondria, the cells’ powerhouses, and results in the production of usable energy by cells — according to a recent study. This discovery raises the possibility that…

Treating people with relapsing-remitting multiple sclerosis (RRMS) for one year with the immune-modulating therapy Gilenya (fingolimod) reduced the numbers of antibody-producing B-cells and of T helper cells, a study finds.  While the…

Mayzent (siponimod), an approved oral therapy for active secondary progressive multiple sclerosis (SPMS), promotes a more regulatory immune system, which may explain its added benefits for SPMS, new clinical data show. The study “Siponimod enriches regulatory T and B lymphocytes in secondary progressive multiple sclerosis” was published in the…

A small RNA molecule found in high levels in the gut of people with multiple sclerosis (MS) could be used to develop a new therapy for MS in the future, an early research study reports. Orally giving this microRNA — called miR-30d — to mouse models of…

The loss of immune B-cells, and the resulting changes in the profile of immune T-cells, is a major mechanism of action for the beneficial effects seen with ublituximab treatment in multiple sclerosis (MS) patients, a study suggests. B-cells are a type of immune cell best known for producing…

A tiny molecule known as microRNA-142 plays a key role in the prevention of autoimmune responses through immune cells called regulatory T-cells (Tregs), according to a new study of  mice. These findings could enable new strategies to treat multiple sclerosis (MS) and other autoimmune diseases, the scientists said. The…

Treating a common animal model of multiple sclerosis (MS) with a typhoid vaccine eased disease symptoms by prompting T helper cells to stop production of a pro-inflammatory factor — interleukin (IL)-17 — and by promoting greater numbers of anti-inflammatory  regulatory T-cells, researchers report. Their study, “Targeting prohibitins at the…

Aspirin, administered orally at low doses, was sufficient to suppress multiple sclerosis (MS) symptoms in a mouse model of relapsing-remitting MS (RRMS) and chronic MS, a study reports. The clinical benefits of aspirin were linked to an increase in the number of regulatory T-cells, those responsible for shutting…

Homotaurine, a compound proven safe for humans in long-term clinical trials, has eased autoimmune responses, brain inflammation, and multiple sclerosis-like symptoms in a mouse model of the disease, a study has found. The findings represent proof-of-principle evidence that homotaurine may represent a new potential class…

Treatment with Rapacan (rapamycin) decreased the size and volume of brain lesions in patients with multiple sclerosis (MS), an Iranian study reports. The study, “Promising effect of rapamycin on multiple sclerosis,” was published in the journal Multiple Sclerosis and Related Disorders. Rapamycin, or sirolimus, is an immunosuppressive…

New research shows that overreactive and tissue-damaging T-cells can transition into regulatory T-cells that help to control the immune system’s response. These findings open the door to further understanding of the mechanism underlying this transition, knowledge that can help scientists in designing more effective, targeted immunotherapies for diseases like multiple…

Propionic acid supplements alter the composition and behavior of immune cells in multiple sclerosis (MS) patients — likely by changing the composition of gut bacteria, according to Alexander Duscha from Ruhr University Bochum in Bochum, Germany. The finding, presented Wednesday at the 7th Joint ECTRIMS-ACTRIMS Meeting running in Paris…

The discovery of an immune cell quality control mission may have put scientists a step closer to understanding how autoimmune conditions such as multiple sclerosis arise. University of Alabama at Birmingham researchers identified regulatory immune cells with the quality control mission of destroying antibody-producing B-cells that mistakenly target the body's own tissue after an infection. An autoimmune disease is one in which the immune system attacks healthy tissue or organs instead of invaders. Eventually, the insight could lead researchers to new approaches for treating MS and other conditions caused by aberrant immune reactions. The Alabama researchers were studying the processes involved in the body's defense against a real threat — the influenza virus — when they discovered a population of immune cells whose action is relevant to autoimmune diseases. The study noted that T follicular regulatory cells appeared in the late stages of influenza infection. Their objective was to prevent the immune system from generating self-reactive antibodies — that is, those that attack the body's own tissue. These cells are poorly understood, the researchers explained. Their experiments, published in the journal Nature Immunology, focused on the molecular events surrounding the cells’ actions.  The team discovered that about a week after the infection, levels of an immune regulator called the IL-2 protein increased. This triggered the multiplication of common regulatory T-cells, or Tregs. When this phase of the immune reaction was fading, TFR cells started multiplying, reaching peak numbers about a month after infection. The formation of the TFR cells was therefore tightly linked to the processes controlling Treg production, researchers said, with falling levels of IL-2 allowing the new phase of the immune response. The TFR cells migrated to the lymph nodes — the headquarters of antibody-producing B-cells. Here, B-cells proliferate and change their antibody-producing genes to create new, stronger antibodies. But sometimes the gene changes, or mutations, give rise to an antibody that attacks the body, instead of invaders. Researchers discovered that TFR cells prevented B-cells, which gave rise to autoantibodies, from accumulating in the lymph nodes. Importantly, the TFR cells had no impact on the immune processes targeting the influenza virus. When researchers prevented TFR cells from forming or removed them from mice, the animals started producing autoantibodies, they explained. While this suggested that people with autoimmune diseases may have flawed TFR processes, the study did not investigate this, making the topic a possibility for future studies.

Researchers have taken the first steps towards the development of a gene therapy for multiple sclerosis — a treatment that boosted anti-inflammatory immune processes and reversed severe paralysis in mouse models of the disease. The University of Florida Health research team said it was optimistic that the therapy can work…

Specific gut bacteria may drive the progression of multiple sclerosis, according to a study showing that two bacterial species made the disease worse in a mouse model of MS. Researchers at the University of California, San Francisco also pinpointed a species — found in lower numbers in MS patients —…