Patricia Inacio, PhD,  science writer—

Patricia holds her PhD in cell biology from the University Nova de Lisboa, Portugal, and has served as an author on several research projects and fellowships, as well as major grant applications for European agencies. She also served as a PhD student research assistant in the Department of Microbiology & Immunology, Columbia University, New York, for which she was awarded a Luso-American Development Foundation (FLAD) fellowship.

Articles by Patricia Inacio

Genetic Variants in Inflammasome Genes Influence MS Severity, Progression, Study Suggests

Genetic variants that enhance the activity of the NLRP3 inflammasome or the interleukin-1 beta cytokine are linked to higher severity and progression of multiple sclerosis, a study suggests. Previous studies with mouse models of MS have shown that a complex of innate immune system receptors and sensors, known as the inflammasome, is likely a player promoting the immune system’s attack on the central nervous system in MS and, consequently, the loss of myelin. Follow-up studies showed that people carrying mutations that enhance the function of the NLRP3 inflammasome — one of the three components of the inflammasome complex — had a worse prognosis, once again supporting the role of the inflammasome in MS. Once activated, the inflammasome triggers an enzyme called caspase-1 that promotes the production of two very powerful proinflammatory cytokines called interleukin (IL)-1 beta and IL-18. To further evaluate the role of the inflammasome in MS, a team led by researchers at the Universidade de Sao Paulo in Brazil analyzed the genetic sequence of five inflammasome genes — NLRP1, NLRP3, NLRC4, IL-1 beta, and IL-18 — in blood samples retrieved from 264 patients diagnosed with MS or other demyelinating diseases. They also analyzed 233 healthy individuals used as controls. The team specifically looked at eight variations in certain nucleotides (the building blocks of DNA), called single nucleotide polymorphisms (SNPs). Previous studies reported a link between SNPs in inflammasome-related genes and certain forms of MS. Results showed that SNPs associated with low serum levels of IL-18 were significantly less frequent in MS patients than in controls. In contrast, variants that enhance the function of NLRP3 and IL-1 beta were associated with severity and progression of MS, as measured by the Expanded Disability Status Scale. These results suggest that the "activation of NLRP3 inflammasome could represent a risk factor for MS clinical presentation,” the researchers wrote. A particular variant in the NLRC4 gene was less frequent in patients whose disease progressed rapidly compared with those who had a slower disease, an intriguing observation, according to researchers, suggestive of a “protection effect of this variant against a bad prognosis.” Carriers of this variant also responded better to treatment with interferon-beta. Regarding MS type, the genetic variant that promotes the function of the IL-1 beta gene was significantly more frequent in progressive forms of MS than in relapsing-remitting MS, strengthening once again the negative effects of IL-1 beta in the disease. An analysis of inflammasome activity in blood monocytes, a group of immune cells, showed that the inflammasome is permanently activated in MS compared with healthy controls. "This study emphasizes that a constitutive activation of NLRP3 inflammasome, principally through IL-1 beta production, represents a risk factor for both the development of MS and the progression to severe forms of the disease. On the other hand, low IL-18 production and/or NLRC4 activation were beneficial for MS patients,” the team concluded.

Gilenya Better at Lowering Relapse Rate than Tecfidera or Aubagio, Study Suggests

Gilenya is linked to significantly lower annualized relapse rates in relapsing-remitting multiple sclerosis (RRMS) patients compared to Tecfidera or Aubagio, a study suggests. All three therapies showed similar effects on disability outcomes. Oral immunotherapies — including Novartis’ Gilenya, Biogen’s Tecfidera, and Sanofi Genzyme’s Aubagio — are currently standard therapies for RRMS treatment. But while these therapies are highly effective at modulating MS activity, studies comparing their efficacy on relapse and disability are missing. This is an important point for MS patients, so that if a change in oral therapies is needed (due to lack of tolerance, for example), the decision on a more suitable therapy is based on scientific evidence. To address this matter, a group of researchers used the MsBase, an international observational MS cohort study, to identify RRMS patients who had been treated with Gilenya, Tecfidera, or Aubagio for at least three months. The team compared Tecfidera versus Aubagio, Gilenya versus Aubagio, and Gilenya versus Tecfidera, specifically for the therapy’s impact on relapse activity, six-month disability worsening or improvement, and persistence of treatment. Relapse was defined as the occurrence of new symptoms or exacerbation of existing ones for a period of over 24 hours, at least 30 days after a previous relapse. Disability was assessed using the Expanded Disability Status Scale (EDSS); the six-month disability worsening or improvement were defined as an increase or a decrease by one value in EDSS. The study included 614 patients treated with Aubagio, 782 with Tecfidera, and 2,332 with Gilenya. Patients were followed over a median of 2.5 years. Patients’ characteristics at baseline differed among the three groups. Aubagio-treated patients tended to be older, with longer periods of disease, fewer relapses, and lower EDSS scores compared to the other two groups. Patients treated with Gilenya had higher EDSS and more relapses during the prior year, compared to those treated with Tecfidera. The majority of the patients had been treated with other immunotherapies prior to being given one of these three oral treatments. Results showed that Gilenya-treated patients had significantly lower annualized relapse rates than those treated with Tecfidera (0.20 versus 0.26) or Aubagio (0.18 versus 0.24), while patients taking either Tecfidera or Aubagio had a similar rate. However, during the 2.5-year period analyzed, researchers found no differences in disability accumulation or disability improvement among the three therapies. Regarding treatment persistence, Tecfidera and Aubagio were more likely to be discontinued than Gilenya. Overall, the results suggest that treatment with Gilenya may have a greater impact on relapse frequency in RRMS patients compared to Tecfidera and Aubagio, although the "effect of the three oral therapies on disability outcomes was similar during the initial 2.5 years on treatment," researchers said. “Choosing a therapy in individual patients remains a complex task that requires thorough and individualized evaluation of disease prognosis, and the corresponding risks and benefits of the increasing number of available therapies,” they concluded.

Study of Myelin Debris Sheds Light on Brain Inflammation in MS

Endothelial cells, those lining the inside of small blood vessels, promote clearance of myelin debris — a common detrimental outcome of demyelinating diseases such as multiple sclerosis (MS) or spinal cord injury. However, in its path to clear the brain from myelin debris, endothelial cells trigger more damaging mechanisms, promoting…

Blood Stem Cell Transplant Better than DMTs at Reducing Risk of Disease Progression in RRMS

Autologous hematopoietic stem cell transplant is better than disease-modifying therapies (DMT) at reducing the risk of disease progression in patients with relapsing-remitting multiple sclerosis (RRMS), results from the MIST clinical trial show. The study “Effect of Nonmyeloablative Hematopoietic Stem Cell Transplantation vs Continued Disease-Modifying Therapy on Disease Progression…

Stem Cell Transplant Lessens Disability and Relapses in RRMS Patients, Phase 2 Trial Shows

Treatment with autologous hematopoietic stem cell transplant (aHSCT) led to a sustained decrease in disability and almost no clinical relapses in patients with relapsing-remitting multiple sclerosis (RRMS) who had failed to respond to prior immunosuppressive therapies, an Australian Phase 2 trial shows. Trial findings were published in the study, “Prospective phase…

Inflammatory Th17 Cells Seen to Trigger Obsessive Compulsive Disorder in MS Mouse Model

The pro-inflammatory Th17 cells that characterize multiple sclerosis (MS) may also underlie symptoms of obsessive-compulsive disorder (OCD), results of a mouse study show. The study, “Auto-Reactive Th17-Cells Trigger Obsessive-Compulsive-Disorder Like Behavior in Mice With Experimental Autoimmune Encephalomyelitis,” was published in the journal Frontiers in Immunology. “For the first time,…

Infection with Common Herpes Virus Speeds MS-like Disease Onset and Progression in Primate Model, Study Reports

Infection with the most common member of the herpes virus family, called HHV-6, may pass unnoticed and without symptoms, but the very act of being infected significantly accelerated the development and progression of a multiple sclerosis-like disease in nonhuman primates, a study reports. Its findings support the role of viral infection in…

GeNeuro to Develop the MS Clinical Program of GNbAC1 Without Servier

GeNeuro announced it has reacquired from Servier the worldwide rights to commercialize and develop the investigational humanized antibody GNbAC1 for the treatment of multiple sclerosis (MS). The decision came after Servier, a European company which, together with GeNeuro, developed the GNbAC1 program, declined to continue developing the therapy due to…

Gilenya More Effective Than Avonex in Lowering Relapse Rates, New Lesions in Children with Relapsing MS, Phase 3 Trial Shows

Two years of treatment with oral Gilenya (fingolimod) significantly reduced the rate of relapses when compared to Avonex (interferon beta-1a) intramuscular injections in children and adolescents with relapsing forms of multiple sclerosis (RMS), according to Phase 3 clinical trial results. Additionally, Gilenya (marketed by Novartis) decreased the number of central nervous…

Higher Levels of Neurofilament Light Chain in Blood and Cerebrospinal Fluid Found in MS Patients, Supporting its Prognostic Potential

A meta-analysis of 13 case-control studies shows that the levels of the protein neurofilament light chain (NFL) are significantly higher in both the cerebrospinal fluid and blood of multiple sclerosis (MS) patients, compared to healthy controls. This finding adds to previous evidence supporting the usefulness of NFL as a…

Cell-free Mitochondrial DNA in Cerebrospinal Fluid of Progressive MS Patients May Point to Neurodegeneration

Cerebrospinal fluid of progressive multiple sclerosis (MS) patients may carry lower levels of cell-free mitochondrial DNA, according to a team of researchers who say this may be a sign of neurodegeneration among these patients. The study “Cell-free mitochondrial DNA in progressive multiple sclerosis” was published in the journal Mitochondrion.