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https://www.readbyqxmd.com/read/28539745/effect-of-tamarindus-indica-l-and-manihot-esculenta-extracts-on-antibiotic-resistant-bacteria
#1
Zenon Machado Lima, Lenilson Santos da Trindade, Genelane Cruz Santana, Francine Ferreira Padilha, Marcelo da Costa Mendonça, Luiz Pereira da Costa, Jorge A López, Maria Lucila Hernández Macedo
BACKGROUND: The chemical composition of plants used in traditional medicine exhibits biologically active compounds, such as tannins, flavonoids, and alkaloids and becomes a promising approach to treat microbial infections, mainly with drug-resistant bacteria. OBJECTIVE: The aim of the present study was to evaluate the hydroethanolic leaf extracts of Tamarindus indica (tamarind) and Manihot esculenta (cassava) as antimicrobial potential against Pseudomonas aeruginosa clinical isolated and Methicillin-resistant Staphylococcus aureus...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28526515/prenatal-lipopolysaccharide-induces-hypothalamic-dopaminergic-hypoactivity-and-autistic-like-behaviors-repetitive-self-grooming-and-stereotypies
#2
Thiago B Kirsten, Maria M Bernardi
Previous investigations by our group have shown that prenatal exposure to lipopolysaccharide (LPS), which mimics infection by gram-negative bacteria, induces social, cognitive, and communication deficits. For a complete screening of autistic-like behaviors, the objective of this study was to evaluate if our rat model also induces restricted and repetitive stereotyped behaviors. Thus, we studied the self-grooming microstructure. We also studied the neurochemistry of hypothalamus and frontal cortex, which are brain areas related to autism to better understand central mechanisms involved in our model...
May 16, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28522324/non-invasive-three-dimensional-imaging-of-escherichia-coli-k1-infection-using-diffuse-light-imaging-tomography-combined-with-micro-computed-tomography
#3
REVIEW
Luci A Witcomb, Julie Czupryna, Kevin P Francis, Gad Frankel, Peter W Taylor
In contrast to two-dimensional bioluminescence imaging, three dimensional diffuse light imaging tomography with integrated micro-computed tomography (DLIT-μCT) has the potential to realise spatial variations in infection patterns when imaging experimental animals dosed with derivatives of virulent bacteria carrying bioluminescent reporter genes such as the lux operon from the bacterium Photorhabdus luminescens. The method provides an opportunity to precisely localise the bacterial infection sites within the animal and enables the generation of four-dimensional movies of the infection cycle...
May 15, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28511889/severely-infected-pneumoceles-of-the-frontal-sinus-in-patients-with-mental-retardation-and-brain-atrophy-treated-by-endoscopic-sinus-surgery
#4
Ichiro Tojima, Hirotaka Kikuoka, Takao Ogawa, Takeshi Shimizu
We herein present three cases of abnormally expanded frontal sinuses (pneumoceles) with severe infection in patients with mental retardation and brain atrophy. Two patients previously underwent laryngotracheal separation surgery, and bacteriological examinations of purulent nasal discharge revealed infections caused by drug-resistant bacteria such as Pseudomonas aeruginosa and Acinetobacter baumannii. As conservative medical treatments were ineffective, all three patients were treated by computed tomography-guided endoscopic sinus surgery...
May 13, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28501669/an-update-on-bacterial-brain-abscess-in-immunocompetent-patients
#5
REVIEW
R Sonneville, R Ruimy, N Benzonana, L Riffaud, A Carsin, J-M Tadié, C Piau, M Revest, P Tattevin
BACKGROUND: Brain abscess is a focal infection of the brain, that begins as a localized area of cerebritis. In immunocompetent patients, bacteria are responsible for >95% of brain abscess, and enter the brain either through contiguous spread following otitis, sinusitis, neurosurgery, or cranial trauma, or through hematogenous dissemination. AIMS: To identify recent advents in the field. Sources We searched Medline and Embase for articles published during years 2012-2016, with the keywords 'brain', and 'abscess'...
May 10, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28489816/endothelial-tlr4-and-the-microbiome-drive-cerebral-cavernous-malformations
#6
Alan T Tang, Jaesung P Choi, Jonathan J Kotzin, Yiqing Yang, Courtney C Hong, Nicholas Hobson, Romuald Girard, Hussein A Zeineddine, Rhonda Lightle, Thomas Moore, Ying Cao, Robert Shenkar, Mei Chen, Patricia Mericko, Jisheng Yang, Li Li, Ceylan Tanes, Dmytro Kobuley, Urmo Võsa, Kevin J Whitehead, Dean Y Li, Lude Franke, Blaine Hart, Markus Schwaninger, Jorge Henao-Mejia, Leslie Morrison, Helen Kim, Issam A Awad, Xiangjian Zheng, Mark L Kahn
Cerebral cavernous malformations (CCMs) are a cause of stroke and seizure for which no effective medical therapies yet exist. CCMs arise from the loss of an adaptor complex that negatively regulates MEKK3-KLF2/4 signalling in brain endothelial cells, but upstream activators of this disease pathway have yet to be identified. Here we identify endothelial Toll-like receptor 4 (TLR4) and the gut microbiome as critical stimulants of CCM formation. Activation of TLR4 by Gram-negative bacteria or lipopolysaccharide accelerates CCM formation, and genetic or pharmacologic blockade of TLR4 signalling prevents CCM formation in mice...
May 10, 2017: Nature
https://www.readbyqxmd.com/read/28484437/a-novel-raym_rs09735-raym_rs09740-two-component-signaling-system-regulates-gene-expression-and-virulence-in-riemerella-anatipestifer
#7
Ying Wang, Ti Lu, Xuehuan Yin, Zutao Zhou, Shaowen Li, Mei Liu, Sishun Hu, Dingren Bi, Zili Li
The Gram-negative bacterium Riemerella anatipestifer is an important waterfowl pathogen, causing major economic losses to the duck-producing industry. However, little is known of the virulence factors that mediate pathogenesis during R. anatipestifer infection. In this study, RAYM_RS09735 and RAYM_RS09740 were predicted to form a two-component signaling system (TCS) through bioinformatics analysis. This TCS was highly conserved across the Flavobacteriaceae. A mutant YMΔRS09735/RS09740 strain was constructed to investigate the role of the RAYM_RS09735/RAYM_RS09740 TCS in R...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28482758/lesions-caused-by-virulent-aeromonas-hydrophila-in-farmed-catfish-ictalurus-punctatus-and-i-punctatus-%C3%A3-i-furcatus-in-mississippi
#8
Wes A Baumgartner, Lorelei Ford, Larry Hanson
In 2009, a virulent strain of Aeromonas hydrophila caused severe disease and high mortalities (motile aeromonad septicemia variant [MASv]) in farmed channel catfish ( Ictalurus punctatus) and hybrid catfish ( I. punctatus × I. furcatus) in eastern Mississippi and Alabama. As is common in MAS, there is severe hemorrhagic dermatitis with ulceration, as well as abdominal hyperemia, petechiation, and mild ascites. Additional findings in MASv cases include panophthalmitis and orbital cellulitis, leading to ocular rupture, and brains are often hyperemic with mild random acute hemorrhage...
May 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28478842/periodontal-disease-as-a-potential-factor-of-migraine-chronification
#9
Pablo Ameijeira, Yago Leira, Juan Blanco, Rogelio Leira
Migraine is a hereditary constitutional base disorder, which is characterized by recurrent episodes of headache pulsatile characteristics associated with photophobia/phonophobia, nausea and/or vomiting. The main complication in migraine is the chronicity of the process, now recognized as a chronic migraine. Although pathogenic mechanisms that may influence the pathophysiology of migraine and its possible chronicity are not fully understood, previous studies have shown in patients with migraine molecular alterations of systemic inflammation, neurogenic inflammation, endothelial dysfunction, innate immunity, dysfunction of matrix proteases and blood-brain barrier...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28467926/a-specific-gut-microbiota-dysbiosis-of-type-2-diabetic-mice-induces-glp-1-resistance-through-an-enteric-no-dependent-and-gut-brain-axis-mechanism
#10
Estelle Grasset, Anthony Puel, Julie Charpentier, Xavier Collet, Jeffrey E Christensen, François Tercé, Rémy Burcelin
Glucagon-like peptide-1 (GLP-1)-based therapies control glycemia in type 2 diabetic (T2D) patients. However, in some patients the treatment must be discontinued, defining a state of GLP-1 resistance. In animal models we identified a specific set of ileum bacteria impairing the GLP-1-activated gut-brain axis for the control of insulin secretion and gastric emptying. Using prediction algorithms, we identified bacterial pathways related to amino acid metabolism and transport system modules associated to GLP-1 resistance...
May 2, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28466891/analogues-of-desferrioxamine-b-designed-to-attenuate-iron-mediated-neurodegeneration-synthesis-characterisation-and-activity-in-the-mptp-mouse-model-of-parkinson-s-disease
#11
Michael P Gotsbacher, Thomas J Telfer, Paul K Witting, Kay L Double, David I Finkelstein, Rachel Codd
Parkinson's disease (PD) is a neurodegenerative disorder characterised by the death of dopaminergic neurons in the substantia nigra pars compacta (SNpc) region of the brain and formation of α-synuclein-containing intracellular inclusions. Excess intraneuronal iron in the SNpc increases reactive oxygen species (ROS), which identifies removing iron as a possible therapeutic strategy. Desferrioxamine B (DFOB, 1) is an iron chelator produced by bacteria. Its high Fe(iii) affinity, water solubility and low chronic toxicity is useful in removing iron accumulated in plasma from patients with transfusion-dependent blood disorders...
May 3, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28459229/acute-encephalitis-as-initial-presentation-of-leptospirosis
#12
Edmond Puca, Joana Majko, Entela Puca, Elda Qyra, Arjet Gega, Pellumb Pipero
Encephalitis is an acute inflammation of the brain matter, very often associated with viral infections, but it can also be caused by non-viral pathogens such as leptospirosis. Leptospirosis is a systemic disease caused by bacteria of the Leptospira genus. Leptospiral infection has a broad spectrum of clinical manifestations ranging from subclinical or mild illness to a fulminant life-threatening illness. In this case report we describe a young patient from Southern Albania with isolated encephalitis caused by Leptospira, where acute encephalitis was the initial presentation of the disease...
April 30, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28453484/can-better-management-of-periodontal-disease-delay-the-onset-and-progression-of-alzheimer-s-disease
#13
Alice Harding, Sarita Robinson, StJohn Crean, Sim K Singhrao
A risk factor relationship exists between periodontal disease and Alzheimer's disease (AD) via tooth loss, and improved memory following dental intervention. This links the microbial contribution from indigenous oral periodontal pathogens to the manifestation of chronic conditions, such as AD. Here, we use Porphyromonas gingivalis infection to illustrate its effect on mental health. P. gingivalis infection, in its primary sub-gingival niche, can cause polymicrobial synergy and dysbiosis. Dysbiosis describes the residency of select commensals from the oral cavity following co-aggregation around the dominant keystone pathogen, such as P...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28450902/role-of-neural-barriers-in-the-pathogenesis-and-outcome-of-streptococcus-pneumoniae-meningitis
#14
Ofer Prager, Alon Friedman, Yaffa Mizrachi Nebenzahl
Bacterial meningitis is an inflammatory disease of the meninges of the central nervous system (CNS). Streptococcus pneumoniae (S. pneumoniae), Neisseria meningitidis, and Haemophilus influenzae are the major bacterial pathogens causing meningitis with S. pneumoniae being responsible for two thirds of meningitis cases in the developed world. To reach the CNS following nasopharyngeal colonization and bacteraemia, the bacteria traverse from the circulation across the blood brain barrier (BBB) and choroid plexus...
March 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28446880/shifts-in-the-gut-microbiota-composition-due-to-depleted-bone-marrow-beta-adrenergic-signaling-are-associated-with-suppressed-inflammatory-transcriptional-networks-in-the-mouse-colon
#15
Tao Yang, Niousha Ahmari, Jordan T Schmidt, Ty Redler, Rebeca Arocha, Kevin Pacholec, Kacy L Magee, Wendi Malphurs, Jennifer L Owen, Gregory A Krane, Eric Li, Gary P Wang, Thomas W Vickroy, Mohan K Raizada, Christopher J Martyniuk, Jasenka Zubcevic
The brain-gut axis plays a critical role in the regulation of different diseases, many of which are characterized by sympathetic dysregulation. However, a direct link between sympathetic dysregulation and gut dysbiosis remains to be illustrated. Bone marrow (BM)-derived immune cells continuously interact with the gut microbiota to maintain homeostasis in the host. Their function is largely dependent upon the sympathetic nervous system acting via adrenergic receptors present on the BM immune cells. In this study, we utilized a novel chimera mouse that lacks the expression of BM beta1/2 adrenergic receptors (b1/2-ARs) to investigate the role of the sympathetic drive to the BM in gut and microbiota homeostasis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28442909/tat-functionalized-liposomes-for-the-treatment-of-meningitis-an-in-vitro-study
#16
Caterina Bartomeu Garcia, Di Shi, Thomas J Webster
Bacterial meningitis has become a global concern, because of the emergence of antibiotic-resistant bacteria. It has been demonstrated that liposomes can enter bacteria, thus providing a possible treatment for numerous infections, including meningitis. Fusogenic liposomes are pH-sensitive with a high capacity to fuse with the bacteria membrane and promote intracellular drug release. Moreover, this ability can be improved by using cell-penetrating peptides (such as Tat47-57, which is a peptide derived from the Tat protein of HIV)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28442397/molecular-cloning-characterization-and-expression-analysis-of-heat-shock-protein-90-in-albino-northern-snakehead-channa-argus
#17
Aiguo Zhou, Shaolin Xie, Zhenlu Wang, Muhammad Junaid, Lanfen Fan, Chao Wang, Qiao Ye, Yanfeng Chen, De-Sheng Pei, Jixing Zou
The great albino northern snakehead Channa argus is habitual to only the Sichuan Jialing Rivers System in China, making its introduction difficult to other riverine systems. Here, we characterized heat shock protein 90 (AcaHSP90) and probed its molecular responses toward the environmental stressors that C. argus can face during its introduction and breeding in the other southern latitudes of China. To serve the purpose, cDNA encoding of AcaHSP90 were cloned and characterized in albino C. argus. The cDNA was 2752bps that contained an open reading frame (ORF), encoding a 726-amino-acid polypeptide of 83...
April 22, 2017: Gene
https://www.readbyqxmd.com/read/28440039/effect-of-photoactivation-on-the-reduction-of-composite-resin-contamination
#18
Natalia A Pauletti, Luiza P S Girotto, Françoise H S Leite, Débora N Mario
Composite resins are predominantly marketed in developing countries in tube form, and the contents of the tube may be used in numerous procedures for different patients. This represents a problem because of the risk of cross-contamination. This study aimed to evaluate contamination in vitro of the internal contents of composite resin tubes in the dental clinics of a higher-education institution, as well as the effect of photoactivation on the level of contamination. Twenty-five tubes containing composite resin were randomly chosen (by lottery)...
June 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28432035/expression-of-pattern-recognition-receptors-and-activation-of-the-non-canonical-inflammasome-pathway-in-brain-pericytes
#19
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
#20
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
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