B cell

Editor’s note: The Multiple Sclerosis News Today team is providing in-depth coverage of the virtual 37th Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS), Oct. 13–15. Go here to see the latest stories from the conference. Certain types of…

Editor’s note: The Multiple Sclerosis News Today team is providing in-depth coverage of the virtual 37th Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS), Oct. 13–15. Go here to see the latest stories from the…

Anti-CD20 antibody therapies that target B-cells are highly effective for reducing the risk of relapses in people with relapsing-remitting multiple sclerosis (RRMS), a new analysis confirms. The analysis did not find any significant differences in efficacy or safety among the anti-CD20 therapies currently approved to treat RRMS, though…

While people with multiple sclerosis (MS) taking anti-CD20 therapies do not mount a robust antibody response after getting vaccinated against COVID-19, the vaccines do strongly activate other parts of the immune system that are likely to be helpful in fighting the virus, a new study shows. “The message…

Long-term use of Kesimpta (ofatumumab) among people with multiple sclerosis (MS) did not substantially lower their antibody levels, allowing them to retain an ability to fight infections, new data from a Phase 3 clinical trial indicate. “These long-term results continue to support Kesimpta as a high-efficacy, first-choice treatment with…

A 48-week treatment of relapsing multiple sclerosis (MS) with TG Therapeutics’ investigational compound ublituximab led to a marked reduction of brain and spinal cord lesions, massive depletion of relapse-associated immune B-cells, and significantly halted disability progression, according to results from a Phase 2 clinical trial. The data…

TG Therapeutics will discuss ublituximab's ability to deplete B-cells linked to multiple sclerosis and to reduce inflammatory brain lesions at the 7th Joint ECTRIMS–ACTRIMS Meeting in Paris next month. The three presentations will cover preliminary results of a Phase 2 clinical trial of ublituximab's safety and effectiveness as a treatment for relapsing forms of MS, the company said in a press release. The conference will be Oct. 25-28. Dr. Amy E. Lovett-Racke of Ohio State University will discuss ublituximab's ability to decrease B-cells associated with MS after six months of treatment. Ublituximab is an antibody that targets B-cells carrying the CD20 protein on their cell surfaces. These cells are thought to play a role in MS development. Dr. Matilde Inglese of the Icahn School of Medicine at Mount Sinai in New York will discuss ublituximab's ability to decrease study participants' inflammatory brain lesions. And Dr. Edward Fox of Central Texas Neurology Consultants, the trial's principal investigator, will do a poster-session presentation on the study's patient characteristics and preliminary results as a whole, including safety. The ongoing Phase 2 trial is still recruiting patients with relapsing forms of MS. Researchers are randomly assigning participants to receive intravenous infusions of either ublituximab or a placebo. One of the study’s primary goals is to see how well ublituximab depletes B-cells 28 days after the start of treatment. Another primary goal is to see how safe the therapy is, with the measurement being treatment-related adverse events that patients experience over six months. Ublituximab’s ability to reduce relapses will be a secondary measure of the trial. Researchers will assess it after 48 weeks of treatment. Fox, who is the director of the Multiple Sclerosis Clinic of Central Texas, and a clinical assistant professor at the University of Texas Medical Branch in Round Rock, made a ublituximab presentation at the 3rd Congress of the European Academy of Neurology in June. It revealed that the therapy nearly depleted B-cells only four weeks after treatment started. Earlier data suggests that ublituximab can be administered in only one hour. Ocrevus, the only approved MS therapy that targets B-cells with CD20, requires 3 1/2 hours. Although the Phase 2 trial is continuing, the data generated so far supports plans for two Phase 3 trials, TG Therapeutics said. They will randomize patients to receive either ublituximab or Aubagio. The trials, which the company hopes to start by the end of September, will be conducted under a Special Protocol Assessment agreement with the U.S. Food and Drug Administration. It allows the FDA to evaluate the design and population size of a trial a company intends to use to seek a drug's regulatory approval. The FDA has refused to approve therapies whose trial design it believed to be flawed. Obtaining a design sign-off before a trial improves the chance of a treatment being approved if it meets the study's objectives.

The expression by immune B-cells of a protein called T-bet is crucial to promoting production of autoantibodies that recognize and destroy the tissues of one’s own body, finds a new study by researchers at National Jewish Health in Denver. The study, “B cells expressing the transcription factor T-bet drive lupus-like autoimmunity,”…

The 32nd annual congress of the European Committee for Treatment and Research in Multiple Sclerosis, widely referred to as ECTRIMS, will kick off on Wednesday, Sept. 14, in London. The four-day event is partnering this year with the Annual Conference of Rehabilitation in MS  (RIMS), the European network for best…

A recent study published in the journal Science Translational Medicine provided new insights into the role of B cells in multiple sclerosis (MS), and points to a specific line of possible new therapies. The study is entitled “Proinflammatory GM-CSF–producing B cells in multiple sclerosis and B cell…