myelin

A cell therapy intended to boost myelin regeneration — Q-Cells by Q Therapeutics — has received a green light from the U.S. Food and Drug Administration to proceed with a clinical trial in patients with transverse myelitis (TM), a disease that like multiple sclerosis is characterized by myelin damage. FDA approval of the company’s Investigational New…

In case you missed them, here are some news stories that appeared in MS News Today that caught my eye over the past week. Experts Call for Tighter Regulation of Stem Cell Therapies in Use at Clinics Worldwide I read a lot of comments on various social…

A herpes virus that lies dormant in many people can hinder the repair of the neuron-protecting myelin sheath whose deterioration causes multiple sclerosis, a study reports. The finding about the HHV-6 virus may help explain differences in the symptoms and progression of the disease from person to person, researchers said.

B-cells of patients with relapsing-remitting multiple sclerosis (RRMS) secrete substances that are toxic to both neurons and neuron-protecting myelin-forming cells, causing both kinds to die, according to a study. Despite analyses of numerous inflammatory and other factors believed to drive MS processes, researchers were unable to identify the molecules that are toxic, however. Dr. Robert Lisak of Wayne State University in Detroit, Dr. Amit Bar-Or of McGill University in Montreal and their teams are now working on identifying the factor, and learning if the process is also involved in progressive MS. Their study, “B-cells from patients with multiple sclerosis induce cell death via apoptosis in neurons in vitro,” was published in the Journal of Neuroimmunology. It demonstrated that B-cells gathered from the blood of RRMS patients killed lab-grown neurons and oligodendrocyte cells, which form myelin, a protecting coating for nerve cells. Deterioration of the myelin coating and the death of neurons are hallmarks of MS. An earlier study the team conducted indicated that B-cells from MS patients could kill oligodendrocytes. But since the experiments involved only three patients and three controls, the team scaled up their experiments to include 13 patients and an equal number of controls. Both rat and human neurons died when mixed with MS-derived B-cells. In contrast, B-cells from healthy people had little or no impact on the survival of the brain cells. Researchers also discovered that the secreted toxic molecules had no impact on other types of central nervous system cells — astrocytes and microglia. The toxins killed only neurons and myelin-producing cells. The B-cells triggered a process called apoptosis, or programmed cell death, researchers said. This is basically a suicide program. It tells a cell to die when exposed to stressful factors or toxins. The process differs from cell disintegration. Despite thoroughly screening about 40 inflammation-related substances, researchers were unable to identify any factors that caused the cells to die. The National MS Society and the Research Foundation of the MS Society of Canada funded the research, which the U.S. society highlighted in a news release. In the newest phase of the study, researchers will try to learn more about the processes underlying neuron and myelin-related cell deaths and identify the factors responsible. In addition to testing B-cells from progressive MS patients, the team will examine patients with other autoimmune conditions to see if the process is unique to MS or not. Researchers increasingly realize that B-cells are important to MS processes. This observation was underscored by U.S. regulators' approval of the B-cell depleting therapy Ocrevus (ocrelizumab) at treatment for both relapsing and primary progressive MS.

Researchers managed to change the immune system — replacing inflammation with immune tolerance — in a mouse model of multiple sclerosis (MS) using so-called quantum dots, or nano-sized particles carrying pieces of myelin. Experiments with this advanced technological solution may help researchers design MS therapies that are based on promoting regulatory T-cells rather…

A cytomegalovirus infection triggers an increase in inflammatory and cytotoxic immune cells in mice with multiple sclerosis (MS), which leads to enhanced inflammation and loss of nerve-protecting myelin. The study, “Cytomegalovirus infection exacerbates autoimmune mediated neuroinflammation,” was published in the journal Scientific Reports. A cytomegalovirus (CMV) infection…

A physical scaffold that allows lab-grown brain cells to grow in a three-dimensional manner is giving scientists a whole new way of studying the regeneration of myelin, nerve coatings whose damage is at the heart of multiple sclerosis. The scaffold is allowing researchers to test large numbers of compounds for…

Brain stem cells from primary progressive multiple sclerosis (PPMS) patients lack the ability to repair brain damage and to trigger the maturation of protective myelin-producing cells, a surprising study with far-reaching implications indicates. The study also showed that stem cells from individual patients reacted differently to compounds developed to trigger…

Using a small RNA molecule belonging to the family of microRNAs (miRs), scientists could restore myelin in nerve cells and improve limb function in mouse models of human multiple sclerosis (MS). The study, “miR-219 Cooperates with miR-338 in Myelination and Promotes Myelin Repair in the CNS,” was published in…

High levels of a protein called Rab32 may contribute to the progression of multiple sclerosis (MS), leading to neuronal loss, a new study concludes. The study, “Rab32 connects ER stress to mitochondrial defects in multiple sclerosis,” appeared in the Journal of Neuroinflammation. The endoplasmic reticulum (ER) is involved in the production…

The United States has granted a patent to Kadimastem’s stem cell-based technology for treating multiple sclerosis (MS) and other diseases of the nervous system. The patent involves the technology the company used to produce supporting cells in the central nervous system derived from human stem cells, including myelin-producing cells. The United…

Here is my Pick of the Week’s News, as published by Multiple Sclerosis News Today. Ocrevus and the hope of ‘ending MS forever’: Interview with MS Society’s Tim Coetzee Ocrevus possibly being one of the most significant advances in MS treatment, especially for people with PPMS, the…

Regulatory T-cells in the central nervous system trigger the maturation of stem cells that increase the production of myelin at injured neurons — a discovery that places the idea of regeneration in multiple sclerosis (MS) in a whole new light. Myelin is a substance essential to the functioning of the…

The idea of repairing damaged axons — a key component of advancing disability in multiple sclerosis (MS) — just got closer to reality, with the discovery that a compound found in fungi triggered axon regeneration, making damaged axons grow “like weeds.” Scientists have long struggled to find compounds that stimulate the…

People with multiple sclerosis (MS) are three to six times more likely to develop epilepsy than the general population, a study says. Researchers believe the loss of myelin in certain neurons — a hallmark of MS — is what causes the seizures. The study was published in the journal…

The absence of epigenetic factors in myelin-producing oligodendrocyte cells make sure that myelin production is switched off in the adult brain. Targeting these factors may be a way of triggering myelin regeneration in multiple sclerosis (MS), and a step toward personalized medicine for this disease, Dr. Patrizia Casaccia said in a talk…

Treatment with Apitope’s lead agent, ATX-MS-1467, decreased brain lesions in patients with relapsing multiple sclerosis (MS) in a now-completed Phase 2a clinical trial. ATX-MS-1467 is a potential disease-modifying agent with an immune-tolerating action. It consists of four short peptides derived from the myelin basic protein, and is designed to reduce…

Lately, I have been reading more and more about the potential connection between the blood brain barrier and multiple sclerosis. I have been researching the blood brain barrier (BBB) to better understand it and share my findings with readers. The BBB is a network of endothelial cells…

A treatment delivered as a nasal solution helped to preserve eye neurons and improve eyesight in a mouse model of multiple sclerosis (MS), a recent study demonstrated — suggesting that it may be possible to deliver drugs that target the brain in this noninvasive way. But nasal administration is not the only…

Two Cleveland Clinic researchers were awarded multi-year grants by the National Institutes of Health (NIH), under its Outstanding Investigator Award, to find new treatments for multiple sclerosis (MS) and other complex diseases. Bruce Trapp, PhD, an expert in myelin biology and MS, will receive about $7 million over eight years under the…

In what may be one of the most significant discoveries in neurodegenerative disease, researchers have found that brain cells, called astrocytes, contribute to killing neurons and myelin-forming oligodendrocyte cells, which may drive neurodegenerative diseases such as multiple sclerosis (MS). Experiments indicate an aggressive astrocyte type kills cells by secreting a yet-unidentified…

Australia has granted a patent to RegeneRx Biopharmaceuticals for an active ingredient in a therapy that could benefit multiple sclerosis (MS) patients. The patent is for Thymosin beta 4 (Tβ4), the driving force in the company’s RGN-352 treatment. RGN-352 promotes myelination, or the production of protective myelin sheaths for damaged neurons and other nerve…

The discovery of a new type of immune cell in the membranes covering the brain is likely to advance understanding of the immune system’s impact on the brain, a study says. It could also lead to new treatments for multiple sclerosis (MS) and other neurodegenerative diseases. Researchers knew the immune…

Scientists at the University of Buffalo have identified a critical step in the process of nerve myelination after birth, a discovery that holds promise for the development of more effective therapies for neurodegenerative diseases like multiple sclerosis (MS). The research involved the study of voltage-operated calcium channels, which initiate many physiological…

The brain has a system for orchestrating a defense against viral infections, scientists report in a finding that may advance the understanding of disease processes in multiple sclerosis (MS). The newly discovered system is run by brain immune cells called microglia, and researchers will now focus on understanding how these…

A specific type of channel that facilitates calcium flow is needed for normal development of cells that produce a shield, called myelin, around nerve fibers — a finding that could open up new approaches to regenerating the myelin-producing cells (called oligodendrocytes) lost in multiple sclerosis (MS). Researchers now hope to…

Researchers monitoring the decomposition of an abundant brain protein, called myelin basic protein (MBP), discovered that this protein breaks down differently in people with multiple sclerosis (MS) than it does in those without the disease, particularly in two surface regions, and that difference may be the trigger for immune reactions and myelin…

Alterations in microorganisms in the brains of multiple sclerosis (MS) patients could contribute to underlying disease mechanisms, including demyelination, according to researchers. The study, “Brain microbiota disruption within inflammatory demyelinating lesions in multiple sclerosis,” was published in the journal Scientific Reports. It is widely recognized that the…

In a new and possibly important insight into the workings of the immune system, researchers discovered what it takes for T-cells to start targeting myelin sheets in multiple sclerosis (MS). The findings may also explain why some drugs fail to prevent autoimmunity in MS. The study, “Trans-presentation…

The National Institutes of Health (NIH) awarded a $45,000 grant to a team of investigators, led by Tia Walker, PhD, at Indiana University Northwest, to support a research project into the role of copper in multiple sclerosis (MS). The award is a first for IU Northwest, and will allow the team to…