Tysabri

Tysabri (natalizumab), an effective T-cell targeting treatment for multiple sclerosis (MS), seems to also promote the activation of pro-inflammatory immune B-cells in people with this disease, a study found. The study, “Natalizumab promotes activation and pro-inflammatory differentiation of peripheral B cells in multiple sclerosis patients,” was published in the…

Interferon therapy (brand names Avonex, Betaseron, and others) is more effective than glatiramer acetate (sold as Copaxone, Glatopa and other generics) for reducing relapses…

The transcription factor family AP-1 is crucial for the proper activation of immune T-cells, a new study shows, and this finding may have important implications for autoimmune diseases such as multiple sclerosis. The study, titled “AP-1 activity induced by co-stimulation is required for chromatin opening during…

Early treatment with Tysabri (natalizumab) of patients with aggressive pediatric-onset multiple sclerosis is highly effective at achieving disease activity-free status and preventing cognitive decline, a new study shows. The study, “No evidence of disease activity including cognition (NEDA-3 plus) in naïve pediatric multiple sclerosis patients treated with natalizumab,”…

Prescriptions of two multiple sclerosis (MS) treatments —  Merck KGaA‘s Mavenclad (cladribine) and Roche‘s Ocrevus (ocrelizumab) — have been rising in Europe over the past six months, bolstered by greater market access and compassionate use programs, according to a survey of 250 EU neurologists run…

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 topic “Does PML worry you?” from April 18. The world of multiple sclerosis (MS)…

Continuing Tysabri (natalizumab) treatment up to week 28 of pregnancy, and restarting soon after birth, reduces the risk of relapses in women with multiple sclerosis and appears to be safe for the mother and the baby, new research suggests. Doriana Landi, MD, PhD, from Italy’s University of…

It’s been a big week for interesting stories, as the annual meeting of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS) has just concluded. The conference offered much to engage healthcare professionals and researchers, but the following are some presentations that appealed to me as a multiple…

Biogen is presenting new data highlighting the potential clinical benefits of Tysabri (natalizumab), Plegridy (peginterferon beta-1a), and Avonex (interferon beta-1a) for the treatment of specific groups of individuals with multiple sclerosis (MS), including pregnant women and patients with relapsing forms of the disease. The new…

Use of plasma exchange (PLEX) is not effective for treating progressive multifocal leukoencephalopathy (PML), a dangerous brain infection that has been associated with using the multiple sclerosis (MS) medicine Tysabri (natalizumab), a real-world study contends. The findings highlight the importance of  closely monitoring Tysabri users to detect…

Sandoz, a division of Novartis dedicated to the development of biosimilars, has entered an agreement with Polpharma Biologics, a biopharmaceutical company also dedicated to the manufacture of biosimilars, to develop and market a biosimilar to Biogen‘s Tysabri (natalizumab). Tysabri is a disease-modifying therapy (DMT) that was …

Novartis‘ Gilenya (fingolimod), Sanofi Genzyme‘s Aubagio (teriflunomide), and Biogen’s Tysabri (natalizumab) and Tecfidera (dimethyl fumarate) are the top disease-modifying therapies to which patients with multiple sclerosis (MS) have most frequently switched in…

Though known mainly for killing tumor and virally infected cells, a T-cell subtype may restrain immune responses and be protective in autoimmune diseases such as multiple sclerosis (MS), according to new research. The study, “Opposing T cell responses in experimental autoimmune encephalomyelitis,” was published recently in…

Targeting a protein found in immune T-cells called Oct1 may help prevent the misguided immune response seen in autoimmune diseases like multiple sclerosis (MS), a study shows. Most importantly, a lack of Oct1 does not influence the immune system’s ability to fight viral infections. The study “T cell-selective…

Immune system activation induced by filgrastim may be beneficial for patients with progressive multifocal leukoencephalopathy associated with the use of Tysabri (natalizumab), without worsening multiple sclerosis (MS) progression, a study says. The study with that finding, “Treatment of natalizumab‐associated PML with filgrastim,” was published in…

#AANAM – RRMS Patients Switching to Lemtrada Report Greater Satisfaction with Treatment and Improvements in Quality of Life I’m a self-proclaimed secondary progressive, rather than a remitting, multiple sclerosis (MS) person. But a year after round two of Lemtrada (alemtuzumab), I can agree with this report. Several of my…

New data suggests that treatment with Tysabri (natalizumab) in an extended interval dosing regimen is associated with a significantly lower risk of progressive multifocal leukoencephalopathy (PML) in patients with multiple sclerosis (MS), compared with the standard interval dosing. The data was presented by Lana Zhovtis Ryerson, MD, on May 7 at the 2019 …

Treatment with Tysabri (natalizumab) lowers the levels of the biomarker serum neurofilament light chain (sNfL) in patients with secondary progressive multiple sclerosis (SPMS), according to data from a Phase 3 trial. Findings also revealed that higher levels of sNfL correlated with MS lesions and disease activity prior to starting the…

Stable patients with multiple sclerosis (MS) who transition from Tysabri (natalizumab) treatment to Aubagio (teriflunomide) have a lower relapse risk, a new study shows. The study, “Reducing return of disease activity in patients with relapsing multiple sclerosis transitioned from natalizumab to teriflunomide: 12-month interim results of teriflunomide therapy,”…

A protein called MMP-9 could be a predictive marker of progressive multifocal leukoencephalopathy development in patients with relapsing-remitting multiple sclerosis (RRMS) who are being treated with Tysabri (natalizumab), a study suggests. The study, “Dynamic changes of MMP-9 plasma levels correlate with JCV reactivation and immune activation in natalizumab-treated multiple sclerosis patients,” was published in the journal Nature Scientific Reports. Brain inflammation in multiple sclerosis patients occurs when immune cells breach the blood-brain barrier. This layer of cells protect the brain and its supporting fluids, such as cerebral spinal fluid (CSF), from dangerous agents circulating in blood. How easily immune cells can break through the blood-brain barrier depends on its porousness. For instance, it is known that decreasing the activity of matrix metalloproteinases (MMP) increases the protective layer’s permeability. Matrix metalloproteinases are a family of proteins responsible for the degradation of collagen and other proteins in the extracellular matrix, which provides structural and biochemical support to surrounding cells. One metalloproteinase, called MMP-9, has been extensively studied in multiple sclerosis. MMP-9 levels are elevated in the CSF of multiple sclerosis patients and considered a potential biomarker of disease activity and possible therapeutic target. Tysabri (marketed by Biogen) is one of the most effective treatments for RRMS currently available. It works by blocking the entry of immune cells into the brain. Tysabri is known to decrease MMP-9 levels in the CSF and serum in RRMS patients. However, Tysabri has been associated with an increased risk of developing progressive multifocal leukoencephalopathy (PML). This rare and often fatal viral disease, caused by the John Cunningham virus (JCV), is characterized by progressive damage and/or inflammation at multiple sites in the brain. The reduced migration of immune cells across the blood-brain barrier induced by Tysabri is thought to be the cause of this increased PML risk. Whether MMP-9 is involved in this process has not been studied. To look at this, a team led by researchers from Sapienza University and Aldo Moro University in Italy investigated MMP plasma levels following Tysabri treatment in the context of JCV. The team specifically looked at how levels of MMP-9 were linked to disease-related processes. Samples from 34 RRMS patients being treated with Tysabri (intravenous dose of 300 mg every four weeks) were analyzed. As expected, results showed that MMP-9 plasma levels stabilized within one year of Tysabri treatment (up to 12 Tysabri infusions), although they began to steadily rise afterward (between 12 and 24 infusions). These increased MMP-9 plasma levels were not associated with clinical relapses in RRMS patients. "MMP-9 levels increased in plasma accordingly with [Tysabri] infusion number," the researchers wrote. In comparing JCV-positive and JCV-negative samples, the researchers observed an increase in MMP-9 plasma levels in JCV-positive samples. This result suggested that JCV circulation in peripheral blood could be implicated in the increase of MMP-9 levels. Interestingly, increased MMP-9 plasma levels were found to be correlated with immune cell activation. "Our findings suggest a potential pathogenic role of MMP-9 in the development of progressive multifocal leukoencephalopathy during [Tysabri] treatment, and its possible use as a marker of JCV reactivation,” the researchers wrote. Future studies are nonetheless needed to confirm these findings in larger groups of RRMS patients.

Herbicide Called Linuron Seen to Trigger Inflammatory Signals Linked to MS in Study This is only a mouse study, but this herbicide has been banned in Europe because of health concerns. Its effects seem worthy of further investigation. The herbicide linuron, commonly used with other herbicides, insecticides,…

The progressive decline in brain volume in multiple sclerosis (MS) patients, despite treatment with the disease-modifying therapy Tysabri (natalizumab), is driven by atrophy — shrinkage due to the degeneration of cells — in gray matter and not white matter structures, a new study reports. This finding points to new markers…

Initial treatment of relapsing-remitting multiple sclerosis (RRMS) with Gilenya (fingolimod), Tysabri (natalizumab), or Lemtrada (alemtuzumab) is associated with a lower risk of conversion to secondary progressive multiple sclerosis (SPMS), compared with interferon beta or Copaxone (glatiramer acetate), a study reports. Findings also showed that…

WeHealth, PathMaker Collaborating to Develop MyoRegulator as Noninvasive Treatment for Spasticity I’m one of the many people with multiple sclerosis (MS) for whom spasticity is a significant problem. This is a nonmedicinal approach to dealing with it. I hope it doesn’t take too long to make this…

Biogen announced the start of a global Phase 3b clinical trial to evaluate the efficacy and safety of extended interval dosing (EID) with Tysabri (natalizumab) in patients with relapsing-remitting multiple sclerosis (RRMS). Results of the six-week dosing interval will be compared with the approved standard interval dosing…

Tysabri (natalizumab) was found to be superior to interferon beta (IFN-β) in a small, 12-month study with relapsing-remitting multiple sclerosis (RRMS) patients, significantly decreasing their disability levels, its researchers report. A vast majority — 90 percent — of Tysabri-treated patients experienced no relapses during the study period,…

Treatment of multiple sclerosis (MS) patients with rituximab does not increase breast cancer risk in women, and is not associated with a higher risk for malignant cancer of any type in men or women, when compared to Gilenya (fingolimod) or Tysabri (natalizumab), according to a nationwide study in…

Patients with relapsing-remitting multiple sclerosis (RRMS) who switch to Tysabri (natalizumab) after relapses on first-line treatment with other medications show greater relapse reduction and less disability progression than those switching to Gilenya (fingolimod), according to a real-world study. The research, “Comparative effectiveness of switching…

Clinical data and real-world results support the long-term efficacy of Biogen’s medications for multiple sclerosis (MS), according to scientific presentations being released by the company. Specifically, findings support the effectiveness of Tecfidera (dimethyl fumarate) and Tysabri (natalizumab) used early in the disease’s course, as well as the…

How B-cells Work to Promote T-cell Attacks on Myelin That Lead to MS Detailed in Study I keep a close eye on reports about B-cells and T-cells because they’re the targets of Lemtrada, which is my current disease-modifying therapy. (The DMT Ocrevus targets B-cells alone). So, this…