B-cells

An abnormally active metabolism in immune B-cells can trigger the release of pro-inflammatory signaling molecules that drive further inflammation in multiple sclerosis (MS), a study found. Selectively blocking certain metabolic processes with a Bruton’s tyrosine kinase (BTK) inhibitor normalized B-cell metabolism and shifted their signaling to an anti-inflammatory state.

People with multiple sclerosis (MS) of African descent had higher levels of inflammatory B-cells in the fluid around the brain and spinal cord compared with white MS patients in a small U.S. study. These findings may help to explain why Black people with MS tend to experience a faster…

Long-term treatment with Ocrevus (ocrelizumab) doesn’t change the diversity of T-cells — those needed to mount effective immune responses against foreign pathogens — in people with relapsing multiple sclerosis (MS) patients, a small study shows. Consistent with its mechanism of B-cell depletion, however, Ocrevus did reduce the molecular…

An experimental oral therapy called TRE-515 significantly reduced disease severity and the growth of the abnormal immune cells that drive multiple sclerosis (MS) in two mouse models of the disease, a study found. Notably, the efficacy of Trethera Corp.’s potential treatment, administered either in a preventive or therapeutic…

The U.S. Food and Drug Administration (FDA) has granted orphan drug designation to Trethera Corporation’s experimental oral therapy TRE-515 for demyelinating optic neuritis, an eye condition that may progress to multiple sclerosis (MS) or occur during the disease course. The first-in-class therapy is expected to lessen the inflammation…

Among multiple sclerosis (MS) patients on rituximab, higher B-cell counts are predictive of a better antibody-based response to a vaccine for COVID-19, according to a new Swedish study. “In our study, the B-cell level in patients given Rituximab was the only factor that influenced the ability to form antibodies…

The experimental medication ublituximab significantly reduces the number of new brain lesions with severe nerve cell degeneration in people with relapsing multiple sclerosis (MS) as compared with Aubagio (teriflunomide), according to new data from the Phase 3 ULTIMATE clinical trials. The findings showed that ublituximab induces a rapid…

Researchers developed a new mouse model that more closely captures a specific type of inflammation characteristic of progressive multiple sclerosis (MS) — and found, in experiments, that treatment with an oral medication called evobrutinib can lessen disease activity. This new mouse model may help scientists in MS to better study…

Similarities between an Epstein-Barr virus (EBV) protein and a brain protein called GlialCAM may explain why EBV infection increases the risk of multiple sclerosis (MS), results from a new study show. Due to the structural resemblance of the two proteins, B-cells — a type of immune cell that is critical…

One year of Ocrevus (ocrelizumab) treatment does not increase the risk for a rare brain infection — called progressive multifocal leukoencephalopathy (PML) — in people with multiple sclerosis (MS), a study suggests. The study, “Risk Assessment of Progressive Multifocal Leukoencephalopathy in Multiple Sclerosis Patients during…

An investigational immunotherapy, ATA188 showed it could reverse disability and improve exercise capacity in people with progressive forms of multiple sclerosis (MS), Atara Biotherapeutics, its developer, reported in an update on a Phase 1 trial and its long-term extension study. EMBOLD trial findings based on MRI brain imaging…

Treatment with anti-CD20 antibodies reduced the loss of myelin and improved the survival of neurons in a rat model of multiple sclerosis (MS), a new study reports. The findings imply that B-cells — the immune cells that are killed by anti-CD20 antibodies — play a central role in the…

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…

Editor’s note: The Multiple Sclerosis News Today team is providing in-depth coverage of the 2021 Virtual AAN Annual Meeting, April 17–22. Go here to read the latest stories from the conference. Common B-cell depleting therapies, such as rituximab and Ocrevus (ocrelizumab), may result in shorter duration B-cell depleting effects in…

Injecting rituximab — a cancer therapy sometimes used in multiple sclerosis — into the spinal canal of people with progressive forms of MS did not demonstrably lower inflammation or improve clinical conditions, according to the results of a small trial. “Contrary to the initial high expectations, no clear-cut effect on…

In addition to significantly reducing subsets of B-cells — its main immune cell target — Ocrevus (ocrelizumab) lessens pro-inflammatory immune T-cells in people with primary progressive multiple sclerosis (PPMS), a small study shows. Notably, the suppression of immune cell subsets thought to be involved in the abnormal immune responses…

Ublituximab, an investigational anti-CD20 antibody, outperformed Aubagio (teriflunomide) in lowering the frequency of relapses among people with active, relapsing forms of multiple sclerosis (MS), according to top-line data from the Phase 3 ULTIMATE trials. Full results, including data on safety and secondary goals, are expected to be presented…

A particular type of gut microbiota-reactive immune cells, called IgA-producing B-cells, travels to the brain of multiple sclerosis (MS) patients during relapses, where they produce anti-inflammatory molecules, a study shows. The underlying mechanisms of this event and these cells’ role in MS remain largely unclear, but these…

Rituximab, an investigational B-cell depletion therapy that target CD20 to treat people with multiple sclerosis (MS), has significant effects on the characteristics of B-cells that return after treatment is stopped, with cells being less mature yet more activated toward a pro-inflammatory state, a study showed. Treatment also…

The use of certain disease-modifying therapies (DMTs) such as rituximab and Ocrevus (ocrelizumab), which lower the number of a patient’s immune B-cells, may increase the odds of developing a more severe COVID-19 disease course for people with multiple sclerosis (MS), a study suggests. The study, which includes data from the…

COVID-19 Pandemic Had Minimal Emotional Impact in Progressive MS Patients, Survey Finds I beg to differ. I have secondary progressive MS, and COVID-19 has bummed me out. I haven’t been in an exercise room since May. My wife and I haven’t had a meal in a restaurant since late…

Roche has launched a Phase 3 clinical trial program to evaluate fenebrutinib, its investigational oral BTK inhibitor, in people with relapsing forms of multiple sclerosis (MS) and primary progressive MS (PPMS). Data on fenebrutinib’s potency and selectivity, as well as the design of the clinical…

ATA188, Atara Biotherapeutics’ investigative T-cell immunotherapy, is safe, well tolerated, and able to ease disability and improve exercise capacity in patients with progressive forms of multiple sclerosis (MS), according to one-year data from a Phase 1 trial and its long-term extension study. Findings also showed that, after…

Immune B-cells are more abundant and have a pro-inflammatory profile in the cerebrospinal fluid (CSF), the fluid that bathes the central nervous system,  compared to blood in people with relapsing-remitting multiple sclerosis (RRMS), a study reports. The results suggest that therapeutic strategies targeting the CSF B-cells could constitute a…

Ocrevus (ocrelizumab), a second-generation anti-CD20 antibody, may be associated with a greater risk of infections. But it carries a lower risk of cancer and immune reactions than first-generation rituximab in people with multiple sclerosis (MS), according to a real-life study. The higher incidence of infections linked with Ocrevus’…

Ocrevus (ocrelizumab) eliminated the immunity, acquired through vaccination, to the varicella-zoster virus — the virus that causes chickenpox and shingles — in a man with relapsing-remitting multiple sclerosis (RRMS), a case study reported. …

B-Cells Infected by Epstein-Barr Virus Linked to MS Relapse Risk in Study I usually steer clear of mouse studies. Mice lie and monkeys exaggerate, some researchers say. But this is another piece to add to the growing pile of evidence that there’s a great big link between multiple sclerosis…

Immune B-cells that proliferate unchecked when infected by the Epstein-Barr virus (EBV) appear to increase the risk of relapses in patients with multiple sclerosis (MS), a mouse study suggests. The study, “Epstein Barr virus‐immortalized B lymphocytes exacerbate experimental autoimmune encephalomyelitis in xenograft mice,” was published…

Atara Biotherapeutics has enrolled a first patient in a clinical trial testing ATA188, its off-the-shelf T-cell immunotherapy for people with progressive forms of multiple sclerosis (MS). The Phase 1b trial (NCT03283826) follows promising safety and tolerability results from its open-label Phase 1a part, including a…

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…