keyword
MENU ▼
Read by QxMD icon Read
search

Multidrug resistant

keyword
https://www.readbyqxmd.com/read/29342216/in-vitro-activity-of-novel-glycopolymer-against-clinical-isolates-of-multidrug-resistant-staphylococcus-aureus
#1
Vidya P Narayanaswamy, Scott A Giatpaiboon, John Uhrig, Paul Orwin, William Wiesmann, Shenda M Baker, Stacy M Townsend
The incidence of multidrug-resistant (MDR) organisms, including methicillin-resistant Staphylococcus aureus (MRSA), is a serious threat to public health. Progress in developing new therapeutics is being outpaced by antibiotic resistance development, and alternative agents that rapidly permeabilize bacteria hold tremendous potential for treating MDR infections. A new class of glycopolymers includes polycationic poly-N (acetyl, arginyl) glucosamine (PAAG) is under development as an alternative to traditional antibiotic strategies to treat MRSA infections...
2018: PloS One
https://www.readbyqxmd.com/read/29342177/a-new-fluorescent-dye-accumulation-assay-for-parallel-measurements-of-the-abcg2-abcb1-and-abcc1-multidrug-transporter-functions
#2
Edit Szabó, Dóra Türk, Ágnes Telbisz, Nóra Kucsma, Tamás Horváth, Gergely Szakács, László Homolya, Balázs Sarkadi, György Várady
ABC multidrug transporters are key players in cancer multidrug resistance and in general xenobiotic elimination, thus their functional assays provide important tools for research and diagnostic applications. In this study we have examined the potential interactions of three key human ABC multidrug transporters with PhenGreen diacetate (PGD), a cell permeable fluorescent metal ion indicator. The non-fluorescent, hydrophobic PGD rapidly enters the cells and, after cleavage by cellular esterases, in the absence of quenching metal ions, PhenGreen (PG) becomes highly fluorescent...
2018: PloS One
https://www.readbyqxmd.com/read/29341934/advances-in-the-delivery-of-antisense-oligonucleotides-for-combating-bacterial-infectious-diseases
#3
REVIEW
Xiao-Yan Xue, Xing-Gang Mao, Ying Zhou, Zhou Chen, Yue Hu, Zheng Hou, Ming-Kai Li, Jing-Ru Meng, Xiao-Xing Luo
Discovery and development of new antibacterial drugs against multidrug resistant bacterial strains have become more and more urgent. Antisense oligonucleotides (ASOs) show immense potential to control the spread of resistant microbes due to its high specificity of action, little risk to human gene expression, and easy design and synthesis to target any possible gene. However, efficient delivery of ASOs to their action sites with enough concentration remains a major obstacle, which greatly hampers their clinical application...
January 13, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29341887/molecular-basis-of-substrate-polyspecificity-of-the-candida-albicans-mdr1p-multidrug-h-antiporter
#4
Archana Kumari Redhu, Atanu Banerjee, Abdul Haseeb Shah, Alexis Moreno, Manpreet Kaur Rawal, Remya Nair, Pierre Falson, Rajendra Prasad
The molecular basis of polyspecificity of Mdr1p, a major drug/H+ antiporter of Candida albicans, is not elucidated. We have probed the nature of the drug-binding pocket by performing systematic mutagenesis of the 12 transmembrane segments. Replacement of the 252 amino acid residues with alanine or glycine yielded 2/3 neutral mutations while 1/3 led to the complete or selective lost of resistance to drugs or substrates transported by the pump. Using the GlpT-based 3D-model of Mdr1p, we roughly categorized these critical residues depending on their type and localization 1°/ main structural impact ("S" group), 2°/ exposure to the lipid interface ("L" group), 3°/ buried but not facing the main central pocket, inferred as critical for the overall H+/drug antiport mechanism ("M" group) and finally 4°/ buried and facing the main central pocket ("B" group)...
January 13, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29341856/kix-domain-of-atmed15a-a-mediator-subunit-of-arabidopsis-is-required-for-its-interaction-with-different-proteins
#5
Vinay Kumar, Mohd Waseem, Nidhi Dwivedi, Sourobh Maji, Angad Kumar, Jitendra K Thakur
Med15 is an important subunit of Mediator tail module and is characterized by a KIX domain present in the amino terminal. In yeast and metazoans, Med15 KIX domain has been found to interact with various transcription factors, regulating several processes including carbohydrate metabolism, lipogenesis, stress response and multidrug resistance. Mechanism of Med15 functioning in Arabidopsis is largely unknown. In this study, interactome of Arabidopsis Med15, AtMed15a, was characterized. We found 45 proteins that interact with AtMed15a KIX domain, including 11 transcription factors, 3 single strand nucleic acid-binding proteins and 1 splicing factor...
January 17, 2018: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29341617/enhancing-docetaxel-delivery-to-multidrug-resistant-cancer-cells-with-albumin-coated-nanocrystals
#6
Sheryhan F Gad, Joonyoung Park, Ji Eun Park, Gihan N Fetih, Sozan S Tous, Wooin Lee, Yoon Yeo
Intravenous delivery of poorly water-soluble anticancer drugs such as docetaxel (DTX) is challenging due to the low bioavailability and the toxicity related to solubilizing excipients. Colloidal nanoparticles are used as alternative carriers, but low drug loading capacity and circulation instability limit their clinical translation. To address these challenges, DTX nanocrystals (NCs) were prepared using Pluronic F127 as an intermediate stabilizer and albumin as a functional surface modifier, which were previously found to be effective in producing small and stable NCs...
January 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29341352/misregulation-of-membrane-trafficking-processes-in-human-nonalcoholic-steatohepatitis
#7
Anika L Dzierlenga, Nathan J Cherrington
Nonalcoholic steatohepatitis (NASH) remodels the expression and function of genes and proteins that are critical for drug disposition. This study sought to determine whether disruption of membrane protein trafficking pathways in human NASH contributes to altered localization of multidrug resistance-associated protein 2 (MRP2). A comprehensive immunoblot analysis assessed the phosphorylation, membrane translocation, and expression of transporter membrane insertion regulators, including several protein kinases (PK), radixin, MARCKS, and Rab11...
January 17, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29341032/-epidemiology-diagnosis-and-treatment-of-adult-patients-with-nosocomial-pneumonia-update-2017-s3-guideline-of-the-german-society-for-anaesthesiology-and-intensive-care-medicine-the-german-society-for-infectious-diseases-the-german-society-for-hygiene-and-microbiology
#8
K Dalhoff, M Abele-Horn, S Andreas, M Deja, S Ewig, P Gastmeier, S Gatermann, H Gerlach, B Grabein, C P Heußel, G Höffken, M Kolditz, E Kramme, H Kühl, C Lange, K Mayer, I Nachtigall, M Panning, M Pletz, P-M Rath, G Rohde, S Rosseau, B Schaaf, D Schreiter, H Schütte, H Seifert, C Spies, T Welte
Nosocomial pneumonia (HAP) is a frequent complication of hospital care. Most data are available on ventilator-associated pneumonia. However, infections on general wards are increasing. A central issue are infections with multidrug resistant (MDR) pathogens which are difficult to treat in the empirical setting potentially leading to inappropriate use of antimicrobial therapy.This guideline update was compiled by an interdisciplinary group on the basis of a systematic literature review. Recommendations are made according to GRADE giving guidance for the diagnosis and treatment of HAP on the basis of quality of evidence and benefit/risk ratio...
January 2018: Pneumologie
https://www.readbyqxmd.com/read/29340910/resistance-mechanism-in-a-terbinafine-resistant-strain-of-microsporum-canis
#9
Rui Kano, Yun-Hsia Hsiao, Han Hock Siew, Charles Chen, Atsuhiko Hasegawa, Hiroshi Kamata
To clarify the terbinafine (TRF) resistance mechanism in a TRF-resistant strain of Microsporum canis, the expression of the pleiotropic drug resistance (PDR1), multidrug resistance (MDR1), MDR2 and MDR4 genes were investigated by real-time quantitative PCR (RT-qPCR) analysis, given the known interaction of the corresponding proteins with antifungals and with the efflux blocker FK506. The expression of the PDR1, MDR1, MDR2 and MDR4 genes was 2-4 times higher in the TRF-resistant strain grown in the presence of 0...
January 16, 2018: Mycopathologia
https://www.readbyqxmd.com/read/29340898/epidemiological-aspects-of-healthcare-associated-infections-and-microbial-genomics
#10
C Mirande, I Bizine, A Giannetti, N Picot, A van Belkum
Hospital-acquired infections (HAIs) are a cause of continuously increasing morbidity and mortality. Most of these infections are caused by a limited set of bacterial species, which share the capability to efficiently spread from patient to patient and to easily acquire antibiotic resistance determinants. This renders correct and rapid species identification and antibiotic susceptibility testing (AST) important and underscores the relevance of bacterial epidemiological typing. The latter is needed for the sensitive detection and exact tracing of nosocomial spread of these potentially multidrug-resistant microorganisms (MDRO)...
January 17, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29340492/evaluation-of-the-impact-that-the-changes-in-tuberculosis-treatment-implemented-in-brazil-in-2009-have-had-on-disease-control-in-the-country
#11
Marcelo Fouad Rabahi, José Laerte Rodrigues da Silva Júnior, Marcus Barreto Conde
OBJECTIVE: To analyze the impact that the 2009 changes in tuberculosis treatment in Brazil had on the rates of cure, tuberculosis recurrence, mortality, treatment abandonment, and multidrug-resistant tuberculosis (MDR-TB). METHODS: An ordinary least squares regression model was used in order to perform an interrupted time series analysis of secondary data collected from the Brazilian Tuberculosis Case Registry Database for the period between January of 2003 and December of 2014...
November 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/29340463/prevalence-of-and-risk-factors-associated-with-the-presence-of-staphylococcus-aureus-in-the-chronic-wounds-of-patients-treated-in-primary-health-care-settings-in-brazil
#12
Eliane Patricia Lino Pereira-Franchi, Maria Rachel Nogueira Barreira, Natália de Sousa Lima Moreira da Costa, Carlos Magno Castelo Branco Fortaleza, Maria de Lourdes Ribeiro de Souza da Cunha
INTRODUCTION: Wounds can be colonized by methicillin-resistant Staphylococcus aureus (MRSA). METHODS: We evaluated the prevalence of S. aureus and MRSA in the wounds of patients treated at Basic Health Units in Brazil and identified risk factors associated with their presence. RESULTS: The prevalence rates of S. aureus and MRSA were 51.5% and 8.7%, respectively. There was a correlation between the presence of S. aureus in wounds and nostrils (p<0...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29340452/detection-of-multidrug-resistant-pseudomonas-aeruginosa-harboring-bla-ges-1-and-bla-ges-11-in-recife-brazil
#13
Valdemir Vicente da Silva Júnior, Laura Durão Ferreira, Lílian Rodrigues Alves, Adriane Borges Cabral, Paula Regina Luna de Araújo Jácome, Paulo Sérgio Ramos de Araújo, Ana Catarina de Souza Lopes, Maria Amélia Vieira Maciel
INTRODUCTION: Pseudomonas aeruginosa, an important pathogen globally, presents several resistance mechanisms. This study aimed to investigate the presence of bla GES in clinical isolates of Pseudomonas aeruginosa obtained from various clinical specimens from patients admitted to three different hospitals in Recife, Brazil. The Guiana extended spectrum beta-lactamase (GES) enzymes are responsible for conferring broad spectrum resistance to beta-lactam drugs, including the carbapenems. METHODS: A total of 100 carbapenem-resistant P...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29340053/indomethacin-based-stimuli-responsive-micelles-combined-with-paclitaxel-to-overcome-multidrug-resistance
#14
Shuanghu Wang, Xueying Tan, Shujuan Li, Yunfang Zhou, Peiwu Geng, Ailian Hua, Aiping Deng, Zhihong Yu
Development of multidrug resistance against antitumor agents is a major limiting factor for the successful chemotherapy. Currently, both amphiphilic polymeric micelles and chemosensitizers have been proposed to overcome MDR during chemotherapy. Herein, the redox-responsive polymeric micelles composed of dextran and indomethacin (as chemosensitizer) using a disulfide bond as the linker are prepared (DEX-SS-IND) for delivery of antitumor agent paclitaxel (PTX). The high level of glutathione in tumor cells selectively breaks the disulfide bond, leading to the rapid breakdown and deformation of redox-responsive polymeric micelles...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29340044/cepharanthine-hydrochloride-reverses-the-mdr1-p-glycoprotein-mediated-esophageal-squamous-cell-carcinoma-cell-cisplatin-resistance-through-jnk-and-p53-signals
#15
Pengjun Zhou, Rong Zhang, Ying Wang, Dandan Xu, Li Zhang, Jinhong Qin, Guifeng Su, Yue Feng, Hongce Chen, Siyuan You, Wen Rui, Huizhong Liu, Suhong Chen, Hongyuan Chen, Yifei Wang
Esophageal squamous cell carcinoma (ESCC) is an aggressive malignancy that is often resistant to therapy. Nowadays, chemotherapy is still one of the main methods for the treatment of ESCC. However, the multidrug resistance (MDR)-mediated chemotherapy resistance is one of the leading causes of death. Exploring agents able to reverse MDR, which thereby increase the sensitivity with clinical first-line chemotherapy drugs, could significantly improve cancer treatment. Cepharanthine hydrochloride (CEH) has the ability to reverse the MDR in ESCC and the mechanism involved have not been reported...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339431/molecular-insights-into-function-and-competitive-inhibition-of-pseudomonas-aeruginosa-multiple-virulence-factor-regulator
#16
Tomoe Kitao, Francois Lepine, Seda Babloudi, Frederick Walte, Stefan Steinbacher, Klaus Maskos, Michael Blaesse, Michele Negri, Michael Pucci, Bob Zahler, Antonio Felici, Laurence G Rahme
New approaches to antimicrobial drug discovery are urgently needed to combat intractable infections caused by multidrug-resistant (MDR) bacteria. Multiple virulence factor regulator (MvfR or PqsR), a Pseudomonas aeruginosa quorum sensing transcription factor, regulates functions important in both acute and persistent infections. Recently identified non-ligand-based benzamine-benzimidazole (BB) inhibitors of MvfR suppress both acute and persistent P. aeruginosa infections in mice without perturbing bacterial growth...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29339396/efficacy-of-apramycin-against-multidrug-resistant-acinetobacter-baumannii-in-the-murine-neutropenic-thigh-model
#17
Anthony D Kang, Kenneth P Smith, Anders H Berg, Katherine A Truelson, George M Eliopoulos, Christopher McCoy, James E Kirby
Apramycin, an aminocyclitol aminoglycoside, was rapidly bactericidal against Acinetobacter baumannii. In a neutropenic murine thigh infection model, treatment-associated A. baumannii CFU reduction of greater than 4-log10 per thigh was observed for all exposures for which AUC/MIC was greater than 50 and Cmax/MIC was ≈10 or higher. Based on these findings, we suggest that apramycin deserves further pre-clinical exploration as a repurposed therapeutic for the treatment of multidrug-resistant, Gram-negative pathogens including A...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339387/the-genetic-basis-of-emerging-vancomycin-linezolid-and-daptomycin-heteroresistance-in-a-case-of-persistent-enterococcus-faecium-bacteremia
#18
Kieran Chacko, Mitchell Sullivan, Colleen Beckford, Deena Altman, Brianne Ciferri, Theodore Pak, Robert Sebra, Andrew Kasarskis, Camille Hamula, Harm van Bakel
Whole-genome sequencing was used to examine a persistent E. faecium bacteremia that acquired heteroresistance to three antibiotics in response to prolonged multidrug therapy. Comparison of complete genomes before and after each change revealed the emergence of known resistance determinants for vancomycin and linezolid, and suggested that a novel mutation in fabF, encoding a fatty acid synthase, was responsible for daptomycin nonsusceptibility. Plasmid recombination contributed to progressive loss of vancomycin resistance after withdrawal of the drug...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339383/new-shuttle-vectors-for-gene-cloning-and-expression-in-multidrug-resistant-acinetobacter-species
#19
Massimiliano Lucidi, Federica Runci, Giordano Rampioni, Emanuela Frangipani, Livia Leoni, Paolo Visca
Understanding bacterial pathogenesis requires adequate genetic tools to assess the role of individual virulence determinants by mutagenesis and complementation assays, as well as for homologous and heterologous expression of cloned genes. Our knowledge of Acinetobacter baumannii pathogenesis has so far been limited by the scarcity of genetic tools to manipulate multi drug resistant (MDR) epidemic strains which are responsible for most of infections. Here, we report the construction of new multi-purpose shuttle plasmids, namely pVRL1 and pVRL2, which can efficiently replicate in Acinetobacter sp...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29338931/in-vitro-activity-of-eravacycline-against-2213-gram-negative-and-2424-gram-positive-bacterial-pathogens-isolated-in-canadian-hospital-laboratories-canward-surveillance-study-2014-2015
#20
George G Zhanel, Melanie R Baxter, Heather J Adam, Joyce Sutcliffe, James A Karlowsky
Gram-negative (n=2213) and Gram-positive (n=2424) pathogens isolated from patients in 13 Canadian hospitals in 2014 and 2015 were tested for in vitro susceptibility to eravacycline and comparators using the Clinical and Laboratory Standards Institute broth microdilution method. The concentration of eravacycline inhibiting 90% of isolates (MIC90) ranged from 0.5 to 2μg/mL for 9 species of Enterobacteriaceae tested (n=2067). Eravacycline activity was largely unaffected by extended-spectrum β-lactamase phenotypes in Escherichia coli (n=141) and Klebsiella pneumoniae (n=21)...
December 22, 2017: Diagnostic Microbiology and Infectious Disease
keyword
keyword
94495
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"