Marisa Wexler, MS, senior science writer —

Marisa holds a Master of Science in cellular and molecular pathology from the University of Pittsburgh, where she studied novel genetic drivers of ovarian cancer. Her areas of expertise include cancer biology, immunology, and genetics, and she has worked as a science writing and communications intern for the Genetics Society of America.

Articles by Marisa Wexler

Gut Bacteria Are Altered in MS, Linked to Disease Progression

The composition of bacteria in the gut is altered in multiple sclerosis (MS) patients compared with healthy people in the same household, a new study reports. That bacterial composition is affected by disease-modifying therapies and seems to be associated with disease severity. These findings could aid in developing…

T-cells Targeting Epstein-Barr Virus at High Levels in MS Patients

People with multiple sclerosis (MS) have significantly more T-cells equipped with receptors that specifically recognize the Epstein-Barr virus (EBV) than do healthy individuals, a study revealed. Notably, no such differences were detected for T-cells with receptors specifically against other viruses. These findings add to previous data highlightingĀ EBV infection…

Soft Inner Layer Surrounding Brain May Be MS Target, Study Finds

In multiple sclerosis (MS), disease-causing immune T-cells enter the brain and spinal cord through the protective soft membranes covering them, called the leptomeninges, a new study shows. The findings ā€œsuggest that patients with MS could benefit from immunomodulatory therapies that target the leptomeninges,ā€ the researchers wrote, noting these surrounding…

Tysabri Improves Cognition Over Long-term in Early RRMS Patients

Long-term treatment with Tysabri (natalizumab) significantly improves cognitive function and increases the chance of disability reduction in people with early relapsing-remitting multiple sclerosis (RRMS), according to data from the four-year observational STRIVE trial. Patients on Tysabri also reported improved quality of life and less impact of MS on…

High-efficacy DMTs Boost Mid-term Prognosis for Relapsing MS: Study

People with relapsing multiple sclerosis (MS) treated with Tysabri (natalizumab) or Gilenya (fingolimod) are less likely to have disease activity than those on low-efficacy MS medications, according to a small study conducted in Japan. Results also showed that patients receiving the high-efficacy therapies had less brain shrinkage,…

More Microscopic Brain Damage Seen in SPMS Than in RRMS

People with secondary progressive multiple sclerosis (SPMS) have more microscopic damage in normal-appearing brain tissue than do patients with relapsing-remitting multiple sclerosis (RRMS), according to a new imaging study. These patients also have a greater number of chronic active lesions than those with RRMS. “Using advanced diffusion MRI…

Review Showcases Inconsistencies in MS Auditory, Vestibular Research

Abnormalities in the auditory and vestibular systems, which control hearing and balance, are frequently reported among people with multiple sclerosis (MS), a new study found. However, there is a substantial amount of variability in scientific studies that assess these abnormalities, making it difficult to draw an overarching conclusion about…

Global Prevalence of SPMS Estimated, But Seen to Vary Widely

Worldwide, about 22 in every 100,000 people live with secondary progressive multiple sclerosis (SPMS), a review study analyzing data across various countries reported. Its researchers found substantial variability in SPMS rates country-by-country, with countries closer to the poles generally reporting higher prevalence than those near the equator. Rates also…

Researchers Share Strategies to Improve Clinical Trial Recruitment

Publicity in national news outlets and an online self-screening questionnaire helped improve recruitment for a clinical trial in secondary progressive multiple sclerosis (SPMS), a new study highlights. “We have described our experience of recruiting participants with SPMS into two large RCTs [randomized clinical trials] in order to identify areas…

Early Detection of Pseudobulbar Affect May Help Ease MS Symptom

In its inaugural issue, a publication from The Gerontological Society of America provides information about recognizing and managing pseudobulbar affect ā€” uncontrolled outbursts of crying or laughing that the authors say are one of the most “underrecognized and undertreated” symptoms of multiple sclerosis (MS) and other neurological conditions. The…

Ideals on Masculinity May Guide Health Behaviors in Men With MS

Men with multiple sclerosis (MS) show differences in health-related behaviors based on how much they value certain masculine ideals, according to a new study that suggests possible negative effects of masculinity in terms of seeking medical care. Results from the study ā€” which specifically focused on white males in…

New 3D Brain Map May Help in Disease Management: Study

A team of researchers has created a three-dimensional (3D) map of the lymphatic vessels that drain the brain, and demonstrated that these vessels are organized similarly in mice and in humans. The researchers propose measuring these vessels using MRI scans could “allow longitudinal imaging of disease progression that may be…

Stem Cell Transplant Found to Reduce MS Relapses, Ease Disability

Autologous hematopoietic stem cell transplant (aHSCT), a procedure that aims to “reset” the immune system, generally reduces disability and relapse rates in people with multiple sclerosis (MS), according to a new meta-analysis. “Current data encourage a broader application of AHSCT for treating patients with MS while still considering…

Ocrevus Outperforms Rebif in Preventing Myelin Loss in Trial

Two years of treatment with Ocrevus (ocrelizumab) outperformed Rebif (interferon beta-1a) at preventing myelin loss in people with relapsing multiple sclerosis (MS), according to a new analysis of data from the OPERA II clinical trial. Ocrevus’ protection against demyelination was observed both in MS lesions,…

Vagus Nerve Stimulation Boosts Motor Learning in Mouse Model

Providing electrical stimulation to the vagus nerve, a large nerve that plays important roles in modulating nonconscious bodily processes like digestion and heart rate, can improve motor learning in mice, a new study shows. The approach specifically helped the animals learn motor tasks faster and achieve better performance levels in…

No Link Between MS Severity, Vitamin D-related Mutations: Study

A number of genetic variations related to vitamin D metabolism were not significantly associated with the severity of multiple sclerosis (MS), according to a recent study. The study, “Role of Multiple Vitamin D-Related Polymorphisms in Multiple Sclerosis Severity: Preliminary Findings,” was published inĀ Genes. In MS, the body’s immune…