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https://www.readbyqxmd.com/read/28432035/expression-of-pattern-recognition-receptors-and-activation-of-the-non-canonical-inflammasome-pathway-in-brain-pericytes
#1
Ádám Nyúl-Tóth, Mihály Kozma, Péter Nagyőszi, Krisztina Nagy, Csilla Fazakas, János Haskó, Kinga Molnár, Attila E Farkas, Attila G Végh, György Váró, Péter Galajda, Imola Wilhelm, István A Krizbai
Cerebral pericytes are mural cells embedded in the basement membrane of capillaries. Increasing evidence suggests that they play important role in controlling neurovascular functions, i.e. cerebral blood flow, angiogenesis and permeability of the blood-brain barrier. These cells can also influence neuroinflammation which is highly regulated by the innate immune system. Therefore, we systematically tested the pattern recognition receptor expression of brain pericytes. We detected expression of NOD1, NOD2, NLRC5, NLRP1-3, NLRP5, NLRP9, NLRP10 and NLRX mRNA in non-treated cells...
April 18, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28416303/effect-of-instrumentation-techniques-and-preparation-taper-on-apical-extrusion-of-bacteria
#2
Hacer Aksel, Selen Küçükkaya Eren, Aslı Çakar, Ahmet Serper, Cumhur Özkuyumcu, Adham A Azim
INTRODUCTION: The aim of this in vitro study was to evaluate the effects of different root canal instrumentation techniques and preparation tapers on the amount of apically extruded bacteria. METHODS: The root canals of 98 extracted human mandibular incisors were contaminated with Enterococcus faecalis suspension. After incubation at 37°C for 24 hours, the root canals were instrumented with K3 rotary files in a crown-down (CD) or full-length linear instrumentation technique (FL) by using 3 different root canal tapers (0...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28387884/the-probiotics-in-dentistry-a-narrative-review
#3
A M Pujia, M Costacurta, L Fortunato, G Merra, S Cascapera, M Calvani, S Gratteri
The total number of microbes that colonize the human body is far greater than the number of cells that make it up. In recent years, it has been shown that bacteria play an essential role in the body; in fact, they are essential for the maturation of the intestine, the development and control of the immune system, the development of the brain, the metabolism of macronutrients, the synthesis of vitamins, and the energy balance. Bacteria play an essential role in defense of their territory against the entry of other bacteria that may be pathogenic to health...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28382808/weaning-of-neurological-early-rehabilitation-patients-from-mechanical-ventilation-a-retrospective-observational-study
#4
Jens D Rollnik, Joachim K Krauss, Christoph Gutenbrunner, Claus Wallesch, Thomas Münte, Martin Stangel
BACKGROUND: There is little known about the factors influencing the weaning process of long-term mechanically ventilated patients in the neurological early rehabilitation. AIM: To identify salient clinical and neurophysiological variables with impact upon weaning from mechanical ventilation during neurological and neurosurgical early rehabilitation. DESIGN: Observational, retrospective data analysis. POPULATION: A sample of 65 mechanically ventilated neurological and neurosurgical early rehabilitation patients of the BDH-Clinic Hessisch Oldendorf in Northern Germany...
April 4, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28379411/comparison-of-the-inflammatory-response-of-brain-microvascular-and-peripheral-endothelial-cells-following-infection-with-neisseria-meningitidis
#5
Julia Dick, Sabrina Hebling, Jérôme Becam, Muhamed-Kheir Taha, Alexandra Schubert-Unkmeir
The interaction of Neisseria meningitidis with both peripheral and brain endothelial cells is a critical event in the development of invasive meningococcal disease. In this study, we used in vitro models based on human brain microvascular endothelial cells (HBMEC), and peripheral endothelial EA.hy926 cells, to investigate their roles in the inflammatory response towards meningococcal infection. Both cell lines were infected with two pathogenic N. meningitidis isolates and secretion of the cytokine interleukin-6 (IL-6), the CXC chemokine IL-8 and the monocyte chemoattractant protein-1 (MCP-1) were estimated by ELISA...
April 1, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28379309/evidence-of-archaeal-methanogens-in-brain-abscess
#6
Michel Drancourt, Vanessa Demonfort Nkamga, Ndèye Aïssatou Lakhe, Jean-Marie Régis, Henry Dufour, Pierre-Edouard Fournier, Yassina Bechah, W Michael Scheld, Didier Raoult
Background.: Methanogens are antibiotic-resistant anaerobic archaea which escape routine detection in clinical microbiology. We hypothesized that methanogens may participate as part of the anaerobic community causing brain abscess. Methods.: Methanogens were investigated in one index sample by specific PCR-sequencing and culture. The pathogenesis of a methanogen isolate was assessed in a mouse model of brain abscess. Archaea-specific qPCR and metagenomics were used to detect specific archaeal sequences in brain abscess samples and controls...
April 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28379213/energy-dense-diet-triggers-changes-in-gut-microbiota-reorganization-of-gut%C3%A2-brain-vagal-communication-and-increases-body-fat-accumulation
#7
Alexandra C Vaughn, Erin M Cooper, Patricia M DiLorenzo, Levi J O'Loughlin, Michael E Konkel, James H Peters, Andras Hajnal, Tanusree Sen, Sun Hye Lee, Claire B de La Serre, Krzysztof Czaja
Obesity is associated with consumption of energy-dense diets and development of systemic inflammation. Gut microbiota play a role in energy harvest and inflammation and can influence the change from lean to obese phenotypes. The nucleus of the solitary tract (NTS) is a brain target for gastrointestinal signals modulating satiety and alterations in gut-brain vagal pathway may promote overeating and obesity. Therefore, we tested the hypothesis that high-fat diet‑induced changes in gut microbiota alter vagal gut-brain communication associated with increased body fat accumulation...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28375200/low-dose-penicillin-in-early-life-induces-long-term-changes-in-murine-gut-microbiota-brain-cytokines-and-behavior
#8
Sophie Leclercq, Firoz M Mian, Andrew M Stanisz, Laure B Bindels, Emmanuel Cambier, Hila Ben-Amram, Omry Koren, Paul Forsythe, John Bienenstock
There is increasing concern about potential long-term effects of antibiotics on children's health. Epidemiological studies have revealed that early-life antibiotic exposure can increase the risk of developing immune and metabolic diseases, and rodent studies have shown that administration of high doses of antibiotics has long-term effects on brain neurochemistry and behaviour. Here we investigate whether low-dose penicillin in late pregnancy and early postnatal life induces long-term effects in the offspring of mice...
April 4, 2017: Nature Communications
https://www.readbyqxmd.com/read/28372330/the-gut-microbiota-and-alzheimer-s-disease
#9
Chunmei Jiang, Guangning Li, Pengru Huang, Zhou Liu, Bin Zhao
The gut microbiota comprises a complex community of microorganism species that resides in our gastrointestinal ecosystem and whose alterations influence not only various gut disorders but also central nervous system disorders such as Alzheimer's disease (AD). AD, the most common form of dementia, is a neurodegenerative disorder associated with impaired cognition and cerebral accumulation of amyloid-β peptides (Aβ). Most notably, the microbiota-gut-brain axis is a bidirectional communication system that is not fully understood, but includes neural, immune, endocrine, and metabolic pathways...
March 29, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28364129/the-scavenging-capacity-of-dmbt1-is-impaired-by-germline-deletions
#10
Floris J Bikker, Caroline End, Antoon J M Ligtenberg, Stephanie Blaich, Stefan Lyer, Marcus Renner, Rainer Wittig, Kamran Nazmi, Arie van Nieuw Amerongen, Annemarie Poustka, Enno C I Veerman, Jan Mollenhauer
The Scavenger Receptor Cysteine-Rich (SRCR) proteins are an archaic group of proteins characterized by the presence of multiple SRCR domains. They are membrane-bound or secreted proteins, which are generally related to host defense systems in animals. Deleted in Malignant Brain Tumors 1 (DMBT1) is a SRCR protein which is secreted in mucosal fluids and involved in host defense by pathogen binding by its SRCR domains. Genetic polymorphism within DMBT1 leads to DMBT1-alleles giving rise to polypeptides with interindividually different numbers of SRCR domains, ranging from 8 SRCR domains (encoded by 6 kb DMBT1 variant) to 13 SRCR domains (encoded by the 8 kb DMBT1 variant)...
March 31, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28363426/molecular-pathology-of-skeletal-growth-anomalies-in-the-brain-coral-platygyra-carnosa-a-meta-transcriptomic-analysis
#11
Yu Zhang, Jin Sun, Huawei Mu, Janice C Y Lun, Jian-Wen Qiu
Coral skeletal growth anomaly (GA) is a common coral disease. Although extensive ecological characterizations of coral GA have been performed, the molecular pathology of this disease remains largely unknown. We compared the meta-transcriptome of normal and GA-affected polyps of Platygyra carnosa using RNA-Seq. Approximately 50 million sequences were generated from four pairs of normal and GA-affected tissue samples. There were 109 differentially expressed genes (DEGs) in P. carnosa and 31 DEGs in the coral symbiont Symbiodinium sp...
March 28, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28348877/large-scale-genomic-analysis-shows-no-evidence-for-pathogen-adaptation-between-the-blood-and-cerebrospinal-fluid-niches-during-bacterial-meningitis
#12
John A Lees, Philip H C Kremer, Ana S Manso, Nicholas J Croucher, Bart Ferwerda, Mercedes Valls Serón, Marco R Oggioni, Julian Parkhill, Matthijs C Brouwer, Arie van der Ende, Diederik van de Beek, Stephen D Bentley
Recent studies have provided evidence for rapid pathogen genome diversification, some of which could potentially affect the course of disease. We have previously described such variation seen between isolates infecting the blood and cerebrospinal fluid (CSF) of a single patient during a case of bacterial meningitis. Here, we performed whole-genome sequencing of paired isolates from the blood and CSF of 869 meningitis patients to determine whether such variation frequently occurs between these two niches in cases of bacterial meningitis...
January 2017: Microbial Genomics
https://www.readbyqxmd.com/read/28348620/in-vitro-evaluation-of-the-antibacterial-activity-of-five-sealers-used-in-root-canal-therapy
#13
Mohsen Hasheminia, Hamid Razavian, Hamid Mosleh, Babak Shakerian
BACKGROUND: Antibacterial activity is one of the important characteristics of an ideal root canal sealer. The aim of this study was to investigate the antibacterial activity of five different sealers against Enterococcus faecalis using two different methods. MATERIALS AND METHODS: The mineral trioxide aggregate (MTA) Fillapex, Tg-sealer, Endomethasone, AH-26, and RoekoSeal sealers were placed into the brain heart infusion (BHI) culture medium containing E. faecalis (PTCC1393)...
January 2017: Dental Research Journal
https://www.readbyqxmd.com/read/28347867/microbiota-differences-between-commercial-breeders-impacts-the-post-stroke-immune-response
#14
Rebecca Sadler, Vikramjeet Singh, Corinne Benakis, Debora Garzetti, David Brea Lopez, Bärbel Stecher, Josef Anrather, Arthur Liesz
Experimental reproducibility between laboratories is a major translational obstacle worldwide, particularly in studies investigating immunomodulatory therapies in relation to brain disease. In recent years increasing attention has been drawn towards the gut microbiota as a key factor in immune cell polarization. Moreover, manipulation of the gut microbiota has been found effective in a diverse range of brain disorders. Within this study we aimed to test the impact of microbiota differences between mice from different sources on the post-stroke neuroinflammatory response...
March 24, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28335280/pregnancy-vaccination-with-gold-glyco-nanoparticles-carrying-listeria-monocytogenes-peptides-protects-against-listeriosis-and-brain-and-cutaneous-associated-morbidities
#15
Ricardo Calderón-Gonzalez, Héctor Terán-Navarro, Elisabet Frande-Cabanes, Eva Ferrández-Fernández, Javier Freire, Soledad Penadés, Marco Marradi, Isabel García, Javier Gomez-Román, Sonsoles Yañez-Díaz, Carmen Álvarez-Domínguez
Listeriosis is a fatal infection for fetuses and newborns with two clinical main morbidities in the neonatal period, meningitis and diffused cutaneous lesions. In this study, we vaccinated pregnant females with two gold glyconanoparticles (GNP) loaded with two peptides, listeriolysin peptide 91-99 (LLO91-99) or glyceraldehyde-3-phosphate dehydrogenase 1-22 peptide (GAPDH1-22). Neonates born to vaccinated mothers were free of bacteria and healthy, while non-vaccinated mice presented clear brain affections and cutaneous diminishment of melanocytes...
August 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333678/evaluation-of-the-antibacterial-activity-of-green-propolis-extract-and-meadowsweet-extract-against-staphylococcus-aureus-bacteria-importance-in-would-care-compounding-preparations
#16
Nogueira Rodrigo José Lupatini, Panagiota Danopoulos, Rosita Swikidisa, Pinheiro Vanessa Alves
The use of natural products in compounded wound care formulas is an exciting avenue to pursue for compounding pharmacists since these natural products may contain compounds that promote healing on their own. The use of these natural extracts as an alternative therapy for wound care may also provide several benefits, such as decreased inflammation, infection, side effects, and treatment costs. Thus far, several studies have demonstrated antimicrobial activity for various natural product extracts, including green propolis and meadowsweet...
July 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28318536/chromobacterium-violaceum-infection-in-a-horse
#17
Márcia Elisa Hammerschmitt, Veronica Machado Rolim, Gustavo Geraldo Medina Snel, Franciele Maboni Siqueira, David Driemeier, Saulo Petinatti Pavarini
Chromobacterium violaceum is an opportunistic pathogen of mammals that produces characteristic violet pigment in bacterial culture. We report pneumonia and septicaemia caused by C. violaceum in a horse. Necropsy examination was performed on a 3-year-old Quarter Horse stallion with a history of recurrent episodes of pneumonia, fever, dyspnoea and sanguineous nasal discharge. The lungs were not collapsed, but they contained dark red foci mixed with white areas, and multiple nodules of firm consistency. Within the liver and kidney there were randomly distributed, multifocal, white pinpoint lesions (0...
March 16, 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28316999/does-the-gut-microbiota-influence-immunity-and-inflammation-in-multiple-sclerosis-pathophysiology
#18
REVIEW
Monika Adamczyk-Sowa, Aldona Medrek, Paulina Madej, Wirginia Michlicka, Pawel Dobrakowski
Aim. Evaluation of the impact of gut microflora on the pathophysiology of MS. Results. The etiopathogenesis of MS is not fully known. Gut microbiota may be of a great importance in the pathogenesis of MS, since recent findings suggest that substitutions of certain microbial population in the gut can lead to proinflammatory state, which can lead to MS in humans. In contrast, other commensal bacteria and their antigenic products may protect against inflammation within the central nervous system. The type of intestinal flora is affected by antibiotics, stress, or diet...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28293234/dysbiosis-of-gut-microbiota-associated-with-clinical-parameters-in-polycystic-ovary-syndrome
#19
Rui Liu, Chenhong Zhang, Yu Shi, Feng Zhang, Linxia Li, Xuejiao Wang, Yunxia Ling, Huaqing Fu, Weiping Dong, Jian Shen, Andrew Reeves, Andrew S Greenberg, Liping Zhao, Yongde Peng, Xiaoying Ding
Polycystic ovary syndrome (PCOS) is a common endocrine and metabolic disorder in women. Gut microbiota has been implicated to play a critical role in metabolic diseases and may modulate the secretion of mediators of the brain-gut axis. Interaction between gut microbiota and the endocrine and biochemical disturbances in PCOS still remains elusive. Here, we showed an altered gut microbiota significantly correlated with PCOS phenotype. There were 33 patients with PCOS (non-obese PCOS individuals, PN, n = 12; obese PCOS individuals, PO, n = 21) as well as 15 control subjects (non-obese control individuals, CN, n = 9; obese control individuals, CO, n = 6) enrolled in our study...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28293221/fish-as-hosts-of-vibrio-cholerae
#20
REVIEW
Malka Halpern, Ido Izhaki
Vibrio cholerae, the causative agent of pandemic cholera, is abundant in marine and freshwater environments. Copepods and chironomids are natural reservoirs of this species. However, the ways V. cholerae is globally disseminated are as yet unknown. Here we review the scientific literature that provides evidence for the possibility that some fish species may be reservoirs and vectors of V. cholerae. So far, V. cholerae has been isolated from 30 fish species (22 freshwater; 9 marine). V. cholerae O1 was reported in a few cases...
2017: Frontiers in Microbiology
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