keyword
MENU ▼
Read by QxMD icon Read
search

A-toxin

keyword
https://www.readbyqxmd.com/read/27928382/isolated-fourth-nerve-palsy-in-tuberculous-meningitis
#1
María García-Zamora, Hortensia Sánchez-Tocino, Ana Villanueva-Gómez, José Miguel Angles-Deza, Elena Pérez-Gutierrez
Tuberculous meningitis is a type of subacute meningitis and like other intracranial processes can compromise ocular motor nerves, causing palsies. Trochlear nerve is an unusual isolated manifestation in this type of pathology. The authors report a 5-year-old boy presented in their clinic with a trochlear nerve palsy as unique neurological manifestation of tuberculous meningitis. Treatment with complete anti-tuberculous therapy and botulinum A toxin was needed to get the complete resolution of the nerve palsy...
February 2016: Neuro-ophthalmology
https://www.readbyqxmd.com/read/27924350/-use-of-intracutaneous-or-subcutaneous-botulinum-toxin-for-postherpetic-neuralgia
#2
L Halb, B J Amann, H Bornemann-Cimenti
BACKGROUND: Botulinum neurotoxin (BoNT), a toxin of the anaerobic spore-forming bacterium Clostridium botulinum is used as a drug for alleviating muscle spasticity. Other indications include the cosmetic application in facial muscles, hyperhidrosis and neurogenic bladder disorders. It has been approved since 2010 as the first prophylactic treatment for chronic migraine. The analgesic effect of BoNT was observed early on and is currently the subject of intensive research. Painful postherpetic neuralgia is a common complication of an infection with herpes zoster virus...
December 6, 2016: Der Nervenarzt
https://www.readbyqxmd.com/read/27920769/transcriptional-profiling-of-type-ii-toxin-antitoxin-genes-of-helicobacter-pylori-under-different-environmental-conditions-identification-of-hp0967-hp0968-system
#3
María G Cárdenas-Mondragón, Miguel A Ares, Leonardo G Panunzi, Sabino Pacheco, Margarita Camorlinga-Ponce, Jorge A Girón, Javier Torres, Miguel A De la Cruz
Helicobacter pylori is a Gram-negative bacterium that colonizes the human gastric mucosa and is responsible for causing peptic ulcers and gastric carcinoma. The expression of virulence factors allows the persistence of H. pylori in the stomach, which results in a chronic, sometimes uncontrolled inflammatory response. Type II toxin-antitoxin (TA) systems have emerged as important virulence factors in many pathogenic bacteria. Three type II TA systems have previously been identified in the genome of H. pylori 26695: HP0315-HP0316, HP0892-HP0893, and HP0894-HP0895...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27917833/crystal-structure-of-the-toxin-msmeg_6760-the-structural-homolog-of-mycobacterium-tuberculosis-rv2035-a-novel-type-ii-toxin-involved-in-the-hypoxic-response
#4
R Alexandra Bajaj, Mark A Arbing, Annie Shin, Duilio Cascio, Linda Miallau
The structure of Msmeg_6760, a protein of unknown function, has been determined. Biochemical and bioinformatics analyses determined that Msmeg_6760 interacts with a protein encoded in the same operon, Msmeg_6762, and predicted that the operon is a toxin-antitoxin (TA) system. Structural comparison of Msmeg_6760 with proteins of known function suggests that Msmeg_6760 binds a hydrophobic ligand in a buried cavity lined by large hydrophobic residues. Access to this cavity could be controlled by a gate-latch mechanism...
December 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27916477/modulation-of-a-circulating-uremic-solute-via-rational-genetic-manipulation-of-the-gut-microbiota
#5
A Sloan Devlin, Angela Marcobal, Dylan Dodd, Stephen Nayfach, Natalie Plummer, Tim Meyer, Katherine S Pollard, Justin L Sonnenburg, Michael A Fischbach
Renal disease is growing in prevalence and has striking co-morbidities with metabolic and cardiovascular disease. Indoxyl sulfate (IS) is a toxin that accumulates in plasma when kidney function declines and contributes to the progression of chronic kidney disease. IS derives exclusively from the gut microbiota. Bacterial tryptophanases convert tryptophan to indole, which is absorbed and modified by the host to produce IS. Here, we identify a widely distributed family of tryptophanases in the gut commensal Bacteroides and find that deleting this gene eliminates the production of indole in vitro...
November 24, 2016: Cell Host & Microbe
https://www.readbyqxmd.com/read/27915984/structure-function-and-evolution-of-clostridium-botulinum-c2-and-c3-toxins-insight-to-poultry-and-veterinary-vaccines
#6
P Chellapandi, A Prisilla
Clostridium botulinum group III strains are able to produce cytotoxins, C2 toxin and C3 exotoxin, along with botulinum neurotoxin types C and D. C2 toxin and C3 exotoxin produced from this organism are the most important members of bacterial ADP-ribosyltransferase superfamily. Both toxins have distinct pathophysiological functions in the avian and mammalian hosts. The members of this superfamily transfer an ADP-ribose moiety of NAD+ to specific eukaryotic target proteins. The present review describes the structure, function and evolution aspects of these toxins with a special emphasis to the development of veterinary vaccines...
December 1, 2016: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/27910884/the-hha-tomb-toxin-antitoxin-system-shows-conditional-toxicity-and-promotes-persister-cell-formation-by-inhibiting-apoptosis-like-death-in-s-typhimurium
#7
Sangeeta Jaiswal, Prajita Paul, Chandrashekhar Padhi, Shilpa Ray, Daniel Ryan, Shantoshini Dash, Mrutyunjay Suar
Toxin-antitoxin (TA) modules are two component "addictive" genetic elements found on either plasmid or bacterial chromosome, sometimes on both. TA systems perform a wide range of functions like biofilm formation, persistence, programmed cell death, phage abortive infection etc. Salmonella has been reported to contain several such TA systems. However, the hemolysin expression modulating protein (Hha) and its adjacent uncharacterized hypothetical protein TomB (previously known as YbaJ), have not been listed as a TA module in Salmonella...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27902436/exploring-the-parameters-of-post-segregation-killing-using-heterologous-expression-of-secreted-toxin-barnase-and-antitoxin-barstar-in-an-e-coli-case-study
#8
Dorien S Coray, Brigitta Kurenbach, Jack A Heinemann
Post-segregational killing (PSK) is a phenotype determined by plasmids using a toxin and an antitoxin (TA) gene pair. Loss of the genes depletes the cell's reserve of antitoxin and allows the toxin to act upon the cell. PSK benefits mobile elements when it increases reproductive success relative to other mobile competitors. A side effect of PSK is that plasmids become refractory to displacement from the cell during growth as a monoculture. Most PSK systems use a cytoplasmic toxin, but the external toxins of bacteriocins also have a PSK-like effect...
November 16, 2016: Microbiology
https://www.readbyqxmd.com/read/27879113/dynamical-analysis-of-a-toxin-producing-phytoplankton-zooplankton-model-with-refuge
#9
Juan Li, Yongzhong Song, Hui Wan
To study the impacts of toxin produced by phytoplankton and refuges provided for phytoplankton on phytoplankton-zooplankton interactions in lakes, we establish a simple phytoplankton-zooplankton system with Holling type II response function. The existence and stability of positive equilibria are discussed. Bifurcation analyses are given by using normal form theory which reveals reasonably the mechanisms and nonlinear dynamics of the effects of toxin and refuges, including Hopf bifurcation, Bogdanov-Takens bifurcation of co-dimension 2 and 3...
April 1, 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27872077/identification-of-inca-c-plasmid-replication-and-maintenance-genes-and-development-of-a-plasmid-multi-locus-sequence-typing-scheme
#10
Steven J Hancock, Minh-Duy Phan, Kate M Peters, Brian M Forde, Teik Min Chong, Wai-Fong Yin, Kok-Gan Chan, David L Paterson, Timothy R Walsh, Scott A Beatson, Mark A Schembri
Plasmids of incompatibility group IncA/C are becoming increasingly prevalent within pathogenic Enterobacteriaceae. They are associated with the dissemination of multiple clinically relevant resistance genes, including blaCMY and blaNDM Current typing methods for IncA/C plasmids offer limited resolution. In this study, we present the complete sequence of a blaNDM-1-positive IncA/C plasmid, pMS6198A, isolated from a multi-drug resistant uropathogenic Escherichia coli strain. Hyper-saturated transposon mutagenesis, coupled with transposon directed insertion site sequencing (TraDIS) was employed to identify conserved genetic elements required for replication and maintenance of pMS6198A...
November 21, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27849180/calcium-enhances-bile-salt-dependent-virulence-activation-in-vibrio-cholerae
#11
Amanda J Hay, Menghua Yang, Xiaoyun Xia, Zhi Liu, Justin Hammons, William Fenical, Jun Zhu
Vibrio cholerae is the causative bacteria of the diarrheal disease cholera, but also persists in aquatic environments where it displays an expression profile that is distinct from that during infection. Upon entry into the host, a tightly regulated circuit coordinates induction of two major virulence factors: cholera toxin (CT) and a toxin co-regulated pilus (TCP). It has been shown that a set of bile salts, including taurocholate (TC), serve as host signals to activate V. cholerae virulence through inducing the activity of a transmembrane virulence regulator TcpP...
November 14, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27825516/adaptation-of-escherichia-coli-traversing-from-the-faecal-environment-to-the-urinary-tract
#12
Karen L Nielsen, Marc Stegger, Paul A Godfrey, Michael Feldgarden, Paal S Andersen, Niels Frimodt-Møller
The majority of extraintestinal pathogenic Escherichia coli (ExPEC) causing urinary tract infections (UTI) are found in the patient's own gut flora, but only limited knowledge is available on the potential adaptation that may occur in the bacteria in order to traverse the perineum and successfully infect the urinary tract. Here, matching pairs of faecal and UTI isolates from 42 patients were compared pairwise using in-depth whole-genome sequencing to investigate whether genetic changes were evident for successful colonization in these two different environments...
December 2016: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/27825483/isolation-of-botulinolysin-a-thiol-activated-hemolysin-from-serotype-d-clostridium-botulinum-a-species-specific-gene-duplication-in-clostridia
#13
Tomonori Suzuki, Thomas Nagano, Koichi Niwa, Shingo Mutoh, Masataka Uchino, Motohiro Tomizawa, Yoshimasa Sagane, Toshihiro Watanabe
Botulinolysin (BLY) is a toxin produced by Clostridium botulinum that belongs to a group of thiol-activated hemolysins. In this study, a protein exhibiting hemolytic activity was purified from the culture supernatant of C. botulinum serotype D strain 4947. The purified protein displayed a single band by sodium dodecyl sulfate polyacrylamide gel electrophoresis with a molecular mass of 55kDa, and its N-terminal and internal amino acid sequences exhibited high similarity to a group of thiol-activated hemolysins produced by gram-positive bacteria...
December 2016: Microbiological Research
https://www.readbyqxmd.com/read/27821608/the-role-of-ribonuclease-y-in-clostridium-perfringens-mrna-decay-and-processing
#14
Nozomu Obana, Kouji Nakamura, Nobuhiko Nomura
: Ribonuclease Y (RNase Y) is a major endoribonuclease that plays a crucial role in mRNA degradation and processing. We study the role of RNase Y in the Gram-positive anaerobic pathogen Clostridium perfringens, which has until now not been well understood. Our study implies an important role for RNase Y-mediated RNA degradation and processing in virulence gene expression and the physiological development of the organism. We began by constructing an RNase Y conditional knockdown strain in order to observe the importance of RNase Y on growth and virulence...
November 7, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27819667/deletion-of-toxin-antitoxin-systems-in-the-evolution-of-shigella-sonnei-as-a-host-adapted-pathogen
#15
Gareth McVicker, Christoph M Tang
Pathogenic Shigella spp. are the leading cause of bacterial dysentery, with Shigella flexneri and Shigella sonnei accounting for around 90% of cases worldwide. Although S. flexneri causes most disease in low-income countries (following ingestion of contaminated food and/or water), S. sonnei predominates in wealthy countries and is mainly spread from person to person. Although both species contain a large virulence plasmid, pINV, that is essential for the organism to cause disease, little is known about its maintenance...
November 7, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27807585/toxin-induced-autoimmune-hepatitis-caused-by-raw-cashew-nuts
#16
James F Crismale, Ashley Stueck, Meena Bansal
A 64-year-old man with no past medical history presented with abnormally elevated liver enzymes 1 year after developing a diffuse rash thought to be related to eating large quantities of raw cashew nuts. Liver biopsy was performed, which revealed features concerning for drug- or toxin-induced autoimmune hepatitis. The patient began treatment with azathioprine and prednisone, and liver enzymes normalized. We describe a unique case of a toxin-induced autoimmune hepatitis precipitated not by a drug or dietary supplement but by a food product...
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27801769/adult-onset-opsoclonus-myoclonus-syndrome-associated-with-ganglionic-acetylcholine-receptor-autoantibody
#17
Jonathan R Galli, Stacey L Clardy, M Mateo Paz Soldán
INTRODUCTION: Opsoclonus-myoclonus syndrome (OMS) may have a toxin induced, parainfectious, or paraneoplastic etiology. Several autoantibodies have been associated with adult-onset OMS, most commonly antineuronal nuclear antibody 2 (Ri), and it is most frequently associated with breast or small cell lung cancer. The nicotinic ganglionic acetylcholine receptor autoantibody (α3-AChR Ab) has not been described in association. CASE REPORT: A 46-year-old woman was evaluated for symptoms of oscillopsia, tremor, gait imbalance, and mild cognitive deficits that began 6 weeks prior...
November 2016: Neurologist
https://www.readbyqxmd.com/read/27795396/mechanism-of-gene-regulation-by-a-staphylococcus-aureus-toxin
#18
Hwang-Soo Joo, Som S Chatterjee, Amer E Villaruz, Seth W Dickey, Vee Y Tan, Yan Chen, Daniel E Sturdevant, Stacy M Ricklefs, Michael Otto
: The virulence of many bacterial pathogens, including the important human pathogen Staphylococcus aureus, depends on the secretion of frequently large amounts of toxins. Toxin production involves the need for the bacteria to make physiological adjustments for energy conservation. While toxins are primarily targets of gene regulation, such changes may be accomplished by regulatory functions of the toxins themselves. However, mechanisms by which toxins regulate gene expression have remained poorly understood...
October 25, 2016: MBio
https://www.readbyqxmd.com/read/27793509/toxin-profiles-pcr-ribotypes-and-resistance-patterns-of-clostridium-difficile-a-multicentre-study-in-china-2012-2013
#19
Qiong Gao, Shi Wu, Haihui Huang, Yuxing Ni, Ye Chen, Yunjian Hu, Yunsong Yu
A total of 178 clinical isolates of Clostridium difficile were collected from five major teaching hospitals representing northern, eastern and southern China from August 2012 to July 2013. Among the 178 isolates, 162 (91.0%) were toxigenic, including 66 (40.7%) toxin A-negative, toxin B-positive, 95 (58.6%) toxin A-positive, toxin B-positive and only 1 (0.6%) toxin A-, toxin B- and binary toxin-positive. Twenty-nine different PCR ribotypes were identified, of which 017 (21.0%), 012 (17.3%) and novel type H (16...
October 17, 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27791012/notch3-drives-development-and-progression-of-cholangiocarcinoma
#20
Rachel V Guest, Luke Boulter, Benjamin J Dwyer, Timothy J Kendall, Tak-Yung Man, Sarah E Minnis-Lyons, Wei-Yu Lu, Andrew J Robson, Sofia Ferreira Gonzalez, Alexander Raven, Davina Wojtacha, Jennifer P Morton, Mina Komuta, Tania Roskams, Stephen J Wigmore, Owen J Sansom, Stuart J Forbes
The prognosis of cholangiocarcinoma (CC) is dismal. Notch has been identified as a potential driver; forced exogenous overexpression of Notch1 in hepatocytes results in the formation of biliary tumors. In human disease, however, it is unknown which components of the endogenously signaling pathway are required for tumorigenesis, how these orchestrate cancer, and how they can be targeted for therapy. Here we characterize Notch in human-resected CC, a toxin-driven model in rats, and a transgenic mouse model in which p53 deletion is targeted to biliary epithelia and CC induced using the hepatocarcinogen thioacetamide...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
36800
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"