Multiple sclerosis and environmental factors: the role of vitamin D, parasites, and Epstein-Barr virus infection.

Multiple sclerosis and environmental factors: the role of vitamin D, parasites, and Epstein-Barr virus infection. Acta Neurol Scand Suppl. 2015;132(199):46-55 Authors: Correale J, Gaitán MI Abstract Pathogenic mechanisms underlying multiple sclerosis development have yet to be clearly identified, but considerable evidence indicates that autoimmunity plays an important role in the etiology of the disease. It is generally accepted that autoimmune diseases like MS arise from complex interactions between genetic susceptibility and environmental factors. Although environmental factors unequivocally influencing MS development have yet to be established, accumulating evidence singles out several candidates, including sunlight-UV exposure or vitamin D deficiency, viral infections, hygiene, and cigarette smoking. Vitamin D deficiency has been associated with different autoimmune diseases. Several investigations indicate 125 (OH)2 vitamin D plays a critical role in shaping T-cell response and inducing T cells with immunosuppressive properties. Likewise, helminth infections represent another potential environmental factor exerting immunomodulatory properties. Both epidemiological and experimental data provide evidence to support autoimmune down-regulation secondary to parasite infections in patients with MS, through regulatory T- and B-cell action, with effects extending beyond simple response to an infectious agent. Finally, different epidemiological studie...
Source: Acta Neurologica Scandinavica. Supplementum - Category: Neurology Authors: Tags: Acta Neurol Scand Suppl Source Type: research

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Abstract Given that the C580Y polymorphism in the Plasmodium falciparum propeller domain of the kelch 13 gene (pfk13) was documented in Guyana, monitoring for mutations associated with antimalarial resistance was undertaken in neighboring Roraima state in Brazil. Polymorphisms in the pfmdr1 and pfk13 genes were investigated in 275 P. falciparum samples. No pfk13 mutations were observed. Triple mutants 184F, 1042D, and 1246Y were observed in 100% of the samples successfully sequenced for the pfmdr1 gene, with 20.1% of these having an additional mutation at codon 1034C. Among them, 2.5% of samples harbored two copie...
Source: The American Journal of Tropical Medicine and Hygiene - Category: Tropical Medicine Authors: Tags: Am J Trop Med Hyg Source Type: research
Publication date: Available online 14 December 2019Source: NeuroImageAuthor(s): Daan Christiaens, Jelle Veraart, Lucilio Cordero-Grande, Anthony N. Price, Jana Hutter, Joseph V. Hajnal, J-Donald TournierAbstractProbing microstructure with diffusion magnetic resonance imaging (dMRI) on a scale orders of magnitude below the imaging resolution relies on biophysical modelling of the signal response in the tissue. The vast majority of these biophysical models of diffusion in white matter assume that the measured dMRI signal is the sum of the signals emanating from each of the constituent compartments, each of which exhibits a d...
Source: NeuroImage - Category: Neuroscience Source Type: research
This study aims, first, to validate a retrospectively-gated implementation of the DENSE method for assessing brain tissue pulsations as a physiological marker, and second, to use the acquired measurements to explore intracranial volume dynamics. We acquired repeated measurements of cerebral volumetric strain in 8 healthy subjects, and internally validated these measurements by comparing them to spinal CSF stroke volumes obtained in the same scan session.Peak volumetric strain was found to be highly repeatable between scan sessions. First/second measured peak volumetric strains were: (6.4 ± 1.7)x10−4/(6.7...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 13 December 2019Source: Journal of Clinical NeuroscienceAuthor(s): Antonia Ceccarelli, Victoria Mifsud, Eslam Abusamra, Syed Irteza HussainAbstractIn clinical trials, Fingolimod was an efficacious and safe treatment for multiple sclerosis (MS). Despite this, few studies have explored its real-world efficacy and safety in the Middle East. The aim of this study was to describe our clinical experience with Fingolimod at Cleveland Clinic Abu Dhabi in Emirati patients with MS. We retrospectively collected clinical and brain and spinal cord MRI activity over time in 30 Emirati MS patients [F/M...
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
Publication date: Available online 13 December 2019Source: Journal of Clinical NeuroscienceAuthor(s): Shoko Hara, Yoji Tanaka, Yasuhiro Ueda, Daisu Abe, Shihori Hayashi, Motoki Inaji, Taketoshi Maehara, Kenji Ishii, Tadashi NariaiAbstractIt is unclear whether the visual assessment of noninvasive arterial spin labeling magnetic resonance imaging (ASL) can identify instances of hemodynamic compromise including an elevated oxygen extraction fraction (OEF) measured by 15O-gas positron emission tomography (PET). Here we evaluated the relationship between a four-point visual assessment system referred to as 'ASL scores' using AS...
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
CONCLUSIONS: Absolok® clips are a valid alternative to Hem-o-Lok® clips to secure blood vessels at the level of tumor bed and to perform a sliding-clip renorrhaphy in patients who underwent open or robot-assisted partial nephrectomy. PMID: 31833724 [PubMed - as supplied by publisher]
Source: Minerva Urologica e Nefrologica - Category: Urology & Nephrology Tags: Minerva Urol Nefrol Source Type: research
Publication date: January 2020Source: The Annals of Thoracic Surgery, Volume 109, Issue 1Author(s): Simone Furia, Nazarena Nannini, Anna Pascarella, Cristiano BredaRosai-Dorfman disease (RDD) is a rare benign disorder of the histiocytes, affecting lymph nodes in its classic form. Extranodal RDD is considered the uncommon subtype and potentially impairs all tissues and intrathoracic organs. In our report, a 18F-fluorodeoxyglucose positron emission tomography scan of a mediastinal mass infiltrating the lungs and of widespread lesions suggested the presence of a metastatic disease. Open thoracic biopsy was required for immuno...
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
This report describes a case in which both these anomalies coexisted in an infant who underwent a successful Ross-Konno operation.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
ConclusionsOccult nodal disease was frequently identified in peripheral N1 stations (11-13) in patients with small (≤2 cm) clinical N0 NSCLC. Hilar lymphadenectomy is essential for accurate staging in the management of patients with small clinical N0 NSCLC.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
In this study, potatoes, carrots and ginger roots were selected as representative vegetables and subjected to RF heating to obtain their heating pattern. At the meantime, the processes were simulated with the COMSOL Multiphysics® software package with both an imported 3D scanned &reconstructed geometry and a similar regular-shaped geometry, which was close to the original shape of the various food samples for comparison. Results showed that computer simulation with geometry obtained by using 3D scanning could accurately reproduce the experimental results for the hot/cold spot locations and temperature values. For t...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
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