comorbidities

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.

I’ve been considering writing about the fun, fun world of catheters. As this column is morphing into some sort of diary, let’s deal with this week’s medical procedural drama. Welcome to UTI (urinary tract infection) week. Anyone who uses a catheter is prone to a higher incidence of…

A gene mutation may explain the uncontrolled, inflammatory immune response seen in autoimmune and chronic inflammatory diseases like multiple sclerosis, scientists at the Research Institute of the McGill University Health Centre (RI-MUHC) report. It's a discovery that, they said, appears to be "a big step in the right direction." According to the study, published in the journal Science Immunology, alterations in the FOXP3 gene affect specific immune cells called regulatory T-cells, or Tregs. Those mutations hamper Tregs in performing a crucial regulatory role, leading to a loss of control over the immune system’s response to a perceived threat. “We discovered that this mutation in the FOXP3 gene affects the Treg cell’s ability to dampen the immune response, which results in the immune system overreacting and causing inflammation,” Ciriaco Piccirillo, the study's lead author and an immunologist in the Infectious Diseases and Immunity, Global Health Program, at the RI-MUHC, said in a news release. Tregs are known to be the immune system players responsible for keeping other immune cells under control, preventing them from attacking the host’s own tissues, while maintaining a proper immune response against harmful agents. The normal activity of Treg cells is essential for preventing excessive immune reactions. The FOXP3 gene is also well-known, and documented, to be essential for proper Treg cell function. However, the mechanisms by which FOXP3 gene is involved in Treg cell activities are still poorly understood. In the study, “Suppression by human FOXP3+ regulatory T cells requires FOXP3-TIP60 interactions,” the research team — in collaboration with researchers at University of Pennsylvania, University of Washington School of Medicine, and Teikyo University School of Medicine in Japan — evaluated the impact of a FOXP3 gene mutation in autoimmunity response. Taking advantage of cutting-edge technology, the team studied samples from two patients carrying a common FOXP3 gene mutation, which caused a genetic immune disorder called IPEX. Interestingly, the researchers found that this genetic variant did not reduce the number of Treg cells or the levels of FOXP3 protein. Instead, the mutation altered the way Tregs could suppress other immune cells to prevent overactivation. “What was unique about this case of IPEX was that the patient’s Treg cells were fully functional apart from one crucial element: its ability to shut down the inflammatory response,” said Piccirillo. “Understanding this specific mutation has allowed us to shed light on how many milder forms of chronic inflammatory diseases or autoimmune diseases could be linked to alterations in FOXP3 functions,” added Khalid Bin Dhuban, the study's first author and a postdoctoral fellow in Piccirillo’s laboratory. The team developed a compound capable of restoring Treg cells' ability to control the immune system in the presence of this specific FOXP3 gene mutation. Tested in animal models of colitis and arthritis, two chronic inflammatory diseases, the compound reduced inflammation and restored normal Treg function. Researchers now plan to develop similar drugs that may be of use in other diseases where Treg cells are known to be defective, including multiple sclerosis, type 1 diabetes, and lupus. "Currently, we have to shut down the whole immune system with aggressive suppressive therapies in various autoimmune and inflammatory diseases," said Piccirillo. “Our goal is to increase the activity of these Treg cells in certain settings, such as autoimmune diseases, but we want to turn it down in other settings, such as cancer.” “This discovery gives us key insights on how Treg cells are born and how they can be regulated,” Piccirillo added. “With this discovery, we are taking a big step in the right direction.”

Neuroinflammation is an essential process in the development and progression of several neurodegenerative diseases, including multiple sclerosis (MS), Alzheimer’s and Parkinson’s. Researchers from the University of North Carolina School of Medicine have discovered that proteins known as NLRC4 and NLRP3 play key roles in regulating mechanisms involved in brain…

In 2004, I was diagnosed with hypothyroidism, a condition in which the thyroid is underactive and doesn’t product enough important hormones. Six years later, I was diagnosed with multiple sclerosis (MS). Naturally, I became curious as to whether a link might exist between between hypothyroidism and MS. I am…

Mothers with chronic inflammatory and autoimmune diseases, such as multiple sclerosis, have a higher risk of having children with attention-deficit/hyperactivity disorder (ADHD), according to a Norwegian study. The findings were reported in a study titled “Attention-Deficit/Hyperactivity Disorder in Offspring of Mothers With Inflammatory and Immune System Diseases”…

People with multiple sclerosis (MS) are more likely to develop kidney or bladder stones than those without MS, a new study concludes. The report, “Multiple sclerosis and nephrolithiasis: a matched-case comparative study,” appeared in the journal BJU International. Stone disease is highly lethal in patients with spinal cord injury (SCI), a condition that,…

Swallowing difficulties and reduced cough are a major, yet commonly overlooked, issue in patients with multiple sclerosis and other brain conditions, according to Dr. Don Bolser, a University of Florida (UF) professor. Pharmaceutical companies haven’t recognized the importance of preventing bits of food and drink from getting into the lungs while…

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…

Disease processes in multiple sclerosis (MS) likely contribute to the increased sensitivity to airway infections seen in MS patients, a series of experiments in mice demonstrated. The study, presented at the ACTRIMS 2017 Forum, showed that suppressive immune cells travel to the lungs and prevent an essential inflammatory reaction to viral…

Researchers have identified two factors that allow Th17 cells —  which drive multiple sclerosis (MS) and other autoimmune conditions — to form memory cells in the body and cause repeated symptom flare-ups. Knowing the identity of the molecules, which are immune mediators called cytokines, will make it possible for scientists to search…

Loss of hearing symptoms such as tinnitus are not usually attributed to multiple sclerosis, but for those with MS who do experience tinnitus, like me, they can be very annoying. The American Tinnitus Association (ATA) describes the symptoms as: “the perception of sound when no actual external noise is present.

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…

Multiple sclerosis, as with other neurological disorders, brings a lot of changes to our bodies. Many changes and symptoms are much more common than others. It is the lesser-known conditions that MS evokes that sparked my interest for this column. Pseudobulbar Affect (PBA): is a rare condition reported to…

Multiple sclerosis (MS), especially in premenopausal women, does  not seem to be associated with breast cancer, as suggested in previous studies, researchers reported. And, they argue, the higher incidences of this cancer in postmenopausal women with MS may be due more to surveillance bias than true risk. These findings were detailed in the study, “…

Osteoporosis (fragile bones) is only a women’s problem, right? Wrong, especially if you have multiple sclerosis — as I’ve discovered. Osteoporosis causes bones to become weak and brittle.  A fall that probably wouldn’t harm a healthy person can easily break the bone of someone with osteoporosis.  When the…

Preliminary results of a study in Danish patients with multiple sclerosis (MS) suggest that inverse comorbidity may exist in the MS population, lowering patients’ risk for other types of diseases. The results were given in an oral presentation, “Inverse comorbidity in multiple sclerosis. Findings in a complete nationwide cohort,” at the 32nd Congress of the European…

Patients with a number of common conditions — some neurological and some autoimmune, but others not — are being mistakenly diagnosed with multiple sclerosis (MS) because of difficulties in correctly determining this disease and, possibly, pressure to begin treatment early in the disease’s course, according to a recent study published in the…

Gut bacteria and health have been topics of considerable scientific speculation in recent years, and the field of multiple sclerosis (MS) research is no exception. But what do we really know about MS and our intestinal inhabitants? A review, “Emerging Concepts on the Gut Microbiome and Multiple Sclerosis,” published in…

A link indeed appears to exist between multiple sclerosis (MS) and unusual changes in the bacterial composition of the gut, according to researchers at Brigham and Women’s Hospital (BWH). In their study, “Alterations of the human gut microbiome in multiple sclerosis,” published in the journal Nature Communications,…

Inflammation in a brain region called the hippocampus might explain why patients with multiple sclerosis (MS) suffer from depression far more often than patients with other chronic brain diseases. The findings, described in the report “Hippocampal Neuroinflammation, Functional Connectivity, and Depressive Symptoms in Multiple Sclerosis,” published in the…

Fecal samples from a group of people with relapsing-remitting multiple sclerosis (RRMS) showed evidence of a different gut microbiota than that found in healthy controls, and may be a non-genetic reason for the altered immune system responses seen in MS patients. The study, “Multiple sclerosis patients have…

High blood pressure may be linked to greater overall disability in people with multiple sclerosis (MS), although the rate at which disability progresses might be slower than in patients without hypertension, a retrospective study concludes. The research, involving a large number of MS patients, helps to clarify a rather confusing range of views on how…

Fatigue, the most commonly reported symptom in patients with multiple sclerosis (MS), is associated with disease comorbidities such as depression, irritable bowel syndrome, migraine, and anxiety, according to the study “Fatigue and Comorbidities in Multiple Sclerosis,” recently published in the International Journal of MS Care.

As we age, the risk that small blood vessels will start leaking into brain tissue increases, raising our risk of dementia, stroke, and Parkinson’s disease. New research reveals that people with multiple sclerosis (MS) also have these so-called cerebral microbleeds, and links them to increased physical and cognitive disability. When Robert Zivadinov, a professor of…

Increasing evidence suggests that our gut microbiome is able to regulate brain processes and trigger neurological disorders, such as multiple sclerosis (MS). Scientists from around the world discussed these themes at the recent Congress of the European Academy of Neurology in Copenhagen, Denmark. “The gut microbiome can influence the central…

By the time I went through various tests that led to being diagnosed with multiple sclerosis 14 years ago, epilepsy had already been part of my life since the age of 19. No one mentioned any link. The neurologist’s words still ring in my ears. Having already told me that MS was the diagnosis,…

A mutation in a mouse model of the John Cunningham (JC) virus, which causes progressive multifocal leukoencephalopathy (PML), allows the virus to evade the host immune responses in people with multiple sclerosis (MS), according to a study into the mechanisms of PML. Infection with the JC virus most often passes unnoticed in healthy…

Children and adolescents with multiple sclerosis (MS) differ from others in the composition of their gut flora, with higher levels of inflammation-causing bacteria and lower levels of anti-inflammatory bacteria, according to a study from  the University of British Columbia, Canada. The findings, supporting previous hypotheses that the composition of the gut microbial community could influence the development…

A team of researchers suggested that cigarette smoking is associated with adverse effects to white matter in the brain, and reported that smoking may underlie the clinical course of clinically isolated syndrome, an early and potentially predictive symptom of a progression to multiple sclerosis (MS). The study, “Influence of cigarette smoking on white matter in patients with…