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https://www.readbyqxmd.com/read/29141347/-antimicrobial-resistance-and-molecular-subtypes-of-salmonella-typhi-and-salmonella-paratyphoid-isolates-from-jiangsu-province-2012-2015
#1
X X Kong, C Dong, H Ji, Y Wang, C C Bao, X Huo, H M Qian
Objective: To retrospectively analyze the antimicrobial resistance phenotype and molecular typing characteristics of Salmonella (S.) typhi and S. paratyphi in Jiangsu province from 2012 to 2015. Methods: The samples were collected from typhoid and paratyphoid patients in Jiangsu province. The biochemical identification and serotyping were carried out after isolation and culture. Kirby-Bauer (K-B) testing was used to detect the drug susceptibility of the strains. The molecular typing characteristics of S. typhi and S...
November 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/29141224/genetic-and-genomic-characterization-of-462-melanoma-patient-derived-xenografts-tumor-biopsies-and-cell-lines
#2
Bradley Garman, Ioannis N Anastopoulos, Clemens Krepler, Patricia Brafford, Katrin Sproesser, Yuchao Jiang, Bradley Wubbenhorst, Ravi Amaravadi, Joseph Bennett, Marilda Beqiri, David Elder, Keith T Flaherty, Dennie T Frederick, Tara C Gangadhar, Michael Guarino, David Hoon, Giorgos Karakousis, Qin Liu, Nandita Mitra, Nicholas J Petrelli, Lynn Schuchter, Batool Shannan, Carol L Shields, Jennifer Wargo, Brandon Wenz, Melissa A Wilson, Min Xiao, Wei Xu, Xaiowei Xu, Xiangfan Yin, Nancy R Zhang, Michael A Davies, Meenhard Herlyn, Katherine L Nathanson
Tumor-sequencing studies have revealed the widespread genetic diversity of melanoma. Sequencing of 108 genes previously implicated in melanomagenesis was performed on 462 patient-derived xenografts (PDXs), cell lines, and tumors to identify mutational and copy number aberrations. Samples came from 371 unique individuals: 263 were naive to treatment, and 108 were previously treated with targeted therapy (34), immunotherapy (54), or both (20). Models of all previously reported major melanoma subtypes (BRAF, NRAS, NF1, KIT, and WT/WT/WT) were identified...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29141069/a-novel-multi-targeting-approach-to-treating-hair-loss-using-standardized-nutraceuticals
#3
Patricia K Farris, Nicole Rogers, Amy McMichael, Sophia Kogan
<p>Hair loss is a complicated problem that causes significant concern for those who are affected. Patients seeking medical treatment have limited options that include topical minoxidil and oral finasteride. While these treatments are backed by long term clinical use and research outcomes, many patients find topical minoxidil difficult to incorporate into their daily routine and some are concerned with the side effects associated with finasteride. In the office setting, patients may be treated with more invasive procedures such as platelet-rich plasma injections (PRP) and hair transplantation, treatments that often must be repeated and can lead to a costly investment...
November 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29141004/lack-of-mitochondrial-muts-homolog-1-in-toxoplasma-gondii-disrupts-maintenance-and-fidelity-of-mitochondrial-dna-and-reveals-metabolic-plasticity
#4
Tamila Garbuz, Gustavo Arrizabalaga
The importance of maintaining the fidelity of the mitochondrial genome is underscored by the presence of various repair pathways within this organelle. Presumably, the repair of mitochondrial DNA would be of particular importance in organisms that possess only a single mitochondrion, like the human pathogens Plasmodium falciparum and Toxoplasma gondii. Understanding the machinery that maintains mitochondrial DNA in these parasites is of particular relevance, as mitochondrial function is a validated and effective target for anti-parasitic drugs...
2017: PloS One
https://www.readbyqxmd.com/read/29140522/ecodrug-a-database-connecting-drugs-and-conservation-of-their-targets-across-species
#5
Bas Verbruggen, Lina Gunnarsson, Erik Kristiansson, Tobias Österlund, Stewart F Owen, Jason R Snape, Charles R Tyler
Pharmaceuticals are designed to interact with specific molecular targets in humans and these targets generally have orthologs in other species. This provides opportunities for the drug discovery community to use alternative model species for drug development. It also means, however, there is potential for mode of action related effects in non-target wildlife species as many pharmaceuticals reach the environment through patient use and manufacturing wastes. Acquiring insight in drug target ortholog predictions across species and taxonomic groups has proven difficult because of the lack of an optimal strategy and because necessary information is spread across multiple and diverse sources and platforms...
November 11, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29140103/salmonella-gallinarum-field-isolates-and-its-relationship-to-vaccine-strain-sg9r
#6
P K V Koerich, B B Fonseca, E Balestrin, V Tagliari, P G Hoepers, C Ueira-Vieira, I Oldoni, R H Rauber, L Ruschel, V P Do Nascimento
1. The aim of the present study was to determine if the 9R-strain of the Salmonella gallinarum live vaccine was responsible for having fowl typhoid outbreaks in chicken flocks from both chicken and turkey breeders as well as to verify the antimicrobial resistance of the isolates from the outbreaks. 2. The triplex polymerase chain reaction (PCR), standard antimicrobial test, beta-lactamase genes identification and Ion Torrent PMG whole genome sequence were used in the field isolates and in the vaccine strain of S...
November 15, 2017: British Poultry Science
https://www.readbyqxmd.com/read/29139516/dissociative-reactions-of-benzonorbornadienes-with-tetrazines-scope-of-leaving-groups-and-mechanistic-insights
#7
M Xu, R Galindo-Murillo, T E Cheatham, R M Franzini
Bioorthogonal dissociative reactions boast diverse potential applications in chemical biology and drug delivery. The reaction of benzonorbornadienes with tetrazines to release amines from carbamate leaving groups was recently introduced as a bioorthogonal bond-cleavage reaction. The present study aimed at investigating the scope of leaving groups that are compatible with benzonorbornadienes. Synthesis of several benzonorbornadienes with different releasable groups is reported, and the reaction of these molecules with tetrazine was found to be rapid and afforded high release yields...
November 15, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29139199/in-silico-ligand-based-modeling-of-hbace-1-inhibitors
#8
Govindan Subramanian, Gennady Poda
Alzheimer's disease (AD) is a chronic neurodegenerative disease affecting more than 30 million people worldwide. Development of small molecule inhibitors of human β-secretase 1 (hBACE-1) is being the focus of pharmaceutical industry for the past 15-20 years. Here, we successfully applied multiple ligand-based in silico modeling techniques to understand the inhibitory activities of a diverse set of small molecule hBACE-1 inhibitors reported in the scientific literature. Strikingly, the use of only a small subset of 230 (13%) molecules allowed us to develop quality models that performed reasonably well on the validation set of 1476 (87%) inhibitors...
November 15, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29139156/characterization-of-cysteine-thiol-modifications-based-on-protein-microenvironments-and-local-secondary-structures
#9
Akshay Bhatnagar, Debashree Bandyopadhyay
We have demonstrated earlier that protein microenvironments were conserved around disulphide-bridged cystine motifs with similar functions, irrespective of diversity in protein sequences (Bhatnagar et al., 2016; 84:1576-1589) . Here, cysteine thiol modifications were characterized based on protein microenvironments, secondary structures and specific protein functions. Protein microenvironment around an amino acid was defined as the summation of hydrophobic contributions from the surrounding protein fragments and the solvent molecules present within its first contact shell (Bandyopadhyay and Mehler, Proteins 2008; 72:646-659)...
November 15, 2017: Proteins
https://www.readbyqxmd.com/read/29138446/antimicrobial-resistance-and-genetic-diversity-in-ceftazidime-non-susceptible-bacterial-pathogens-from-ready-to-eat-street-foods-in-three-taiwanese-cities
#10
Lin Lin, Sheng-Fan Wang, Tsung-Ying Yang, Wei-Chun Hung, Min-Yu Chan, Sung-Pin Tseng
Bacterial contamination of ready-to-eat (RTE) street foods is a major concern worldwide. Dissemination of antibiotic resistant pathogens from food is an emerging public-health threat. To investigate the prevalence of antibiotic resistance genes and ceftazidime resistance-associated efflux pumps in foodborne pathogens, 270 RTE street foods samples were collected in three densely populated Taiwanese cities. Among 70 ceftazidime non-susceptible isolates, 21 Stenotrophomonas maltophilia, 12 Pseudomonas spp., 22 Acinetobacter spp...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138439/abma-a-small-molecule-that-inhibits-intracellular-toxins-and-pathogens-by-interfering-with-late-endosomal-compartments
#11
Yu Wu, Valérie Pons, Amélie Goudet, Laetitia Panigai, Annette Fischer, Jo-Ana Herweg, Sabrina Kali, Robert A Davey, Jérôme Laporte, Céline Bouclier, Rahima Yousfi, Céline Aubenque, Goulven Merer, Emilie Gobbo, Roman Lopez, Cynthia Gillet, Sandrine Cojean, Michel R Popoff, Pascal Clayette, Roger Le Grand, Claire Boulogne, Noël Tordo, Emmanuel Lemichez, Philippe M Loiseau, Thomas Rudel, Didier Sauvaire, Jean-Christophe Cintrat, Daniel Gillet, Julien Barbier
Intracellular pathogenic microorganisms and toxins exploit host cell mechanisms to enter, exert their deleterious effects as well as hijack host nutrition for their development. A potential approach to treat multiple pathogen infections and that should not induce drug resistance is the use of small molecules that target host components. We identified the compound 1-adamantyl (5-bromo-2-methoxybenzyl) amine (ABMA) from a cell-based high throughput screening for its capacity to protect human cells and mice against ricin toxin without toxicity...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137939/in-silico-identification-and-in-vivo-characterization-of-small-molecule-therapeutic-hypothermia-mimetics
#12
Claire Coderch, María Díaz de Cerio, Jose María Zapico, Rafael Peláez, Ignacio M Larrayoz, Ana Ramos, Alfredo Martínez, Beatriz de Pascual-Teresa
Hypothermia has been proved to have a beneficial effect on several pathologies. CIRBP is one of the so termed cold-shock proteins involved in this process. In this work, we have detected small molecules capable of modulating the activity of CIRBP in the absence of a cold stimulus, by High Throughput Virtual Screening (HTVS) of the Diversity Set IV of the NCI and 15 compounds of our in-house data base. Fifteen compounds were selected from the HTVS to carry out a second screening through a cell-based Western blot assay...
October 31, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29137675/human-hyaluronic-acid-synthase-1-promotes-malignant-transformation-via-epithelial-to-mesenchymal-transition-micronucleation-and-centrosome-abnormalities
#13
Nguyet Nguyen, Awanit Kumar, Simi Chacko, Rodney J Ouellette, Anirban Ghosh
BACKGROUND: Human hyaluronic acid (HA) molecules are synthesized by three membrane spanning Hyaluronic Acid Synthases (HAS1, HAS2 and HAS3). Of the three, HAS1 is found to be localized more into the cytoplasmic space where it synthesizes intracellular HA. HA is a ubiquitous glycosaminoglycan, mainly present in the extracellular matrix (ECM) and on the cell surface, but are also detected intracellularly. Accumulation of HA in cancer cells, the cancer-surrounding stroma, and ECM is generally considered an independent prognostic factors for patients...
November 14, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29137527/binding-modes-of-bcl-2-homology-3-bh3-peptides-with-anti-apoptotic-protein-a1-and-redesign-of-peptide-inhibitors-a-computational-study
#14
Yantao Chen, Jun Wang, Jian Zhang, Wei Wang
The interaction between protein and peptide ligand is a challenging problem in molecular biology and drug design. The binding of the Bcl-2 homology 3 (BH3) peptide to the anti-apoptotic protein A1 was revealed as a critical step in the regulation of apoptosis. These BH3 peptides hold high structural similarity, but are diverse in their regulation abilities. Based on molecular simulations and MM-P(G)BSA methods, this work presented a detailed analysis on binding mechanism of the BH3 peptides derived from PUMA and BMF...
November 15, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29137280/ppar%C3%AE-sumoylation-mediated-lipid-accumulation-in-lung-cancer
#15
Ai N H Phan, Vu T A Vo, Tuyen N M Hua, Min-Kyu Kim, Se-Young Jo, Jong-Whan Choi, Hyun-Won Kim, Jaekyoung Son, Young-Ah Suh, Yangsik Jeong
Metabolic reprogramming as a crucial emerging hallmark of cancer is critical for tumor cells to maintain cellular bioenergetics, biosynthesis and reduction/oxidation (REDOX) balance. Peroxisome proliferator-activated receptor gamma (PPARγ) is a nuclear hormone receptor regulating transcription of diverse gene sets involved in inflammation, metabolism, and suppressing tumor growth. Thiazolidinediones (TZDs), as selective PPARγ ligands, are insulin-sensitizing drugs widely prescribed for type 2 diabetic patients in the clinic...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137078/successful-treatment-of-ovarian-cancer-with-apatinib-combined-with-chemotherapy-a-case-report
#16
Mingzi Zhang, Zhongkai Tian, Yehong Sun
RATIONALE: The standard treatment for ovarian cancer is chemotherapy with 2 drugs (taxanes and platinum drugs). However, the traditional combination of the 2 drugs has many adverse effects (AEs) and the cancer cells will quickly become resistant to the drugs. Apatinib is a small-molecule antiangiogenic agent which has shown promising therapeutic effects against diverse tumor types, but it still remains unknown whether apatinib has an antitumor effect in patients with ovarian cancer. Herein, we present a successfully treated case of ovarian cancer using chemotherapy and apatinib, in order to demonstrate the effectiveness of this new combined regimen in ovarian cancer...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29136876/capillary-electrochromatography-using-knitted-aromatic-polymer-as-the-stationary-phase-for-the-separation-of-small-biomolecules-and-drugs
#17
Pingxiu Tang, Zilin Chen
Hypercrosslinked polymers (HCPs) are currently receiving great attention due to their unique characteristics and potential uses in diverse areas. However, the field of HCPs for open-tubular capillary electrochromatography (OT-CEC) separations has not been explored. Here, a knitted aromatic polymer (KAP) was in-situ grown on the inner wall of the capillary column for OT-CEC for the first time. The silylating reagent containing phenyl was served as monomer, immobilized on the inner wall of the capillary column, and then KAPs-modified capillary column was prepared through in-situ hypercrosslinking reaction...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136743/-drug-resistance-mutations-and-its-associated-factors-among-579-hiv-aids-patients-experiencing-failure-of-antiretroviral-therapy-in-jiangsu-province-china
#18
P P Xiao, J Lu, H Y Hu, X Q Xu, P Ding, G F Fu, X P Huan, Y Zhou, H T Yang
Objective: To understand the incidence and related factors of HIV-1 drug resistance among HIV/AIDS patients experiencing treatment failure in Jiangsu province, China. Methods: The HIV/AIDS integrated prevention and control data information management system of China were used to collect the basic data of patients, blood specimens were collected from patients who had antiretroviral therapy (ART) failure with ≥12 months and older than 18 years in 2016 in Jiangsu, excluding cases with missing information, 713 cases were enrolled in this study...
November 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29136547/natural-products-used-as-a-chemical-library-for-protein-protein-interaction-targeted-drug-discovery
#19
Xuemei Jin, Kyungro Lee, Nam Hee Kim, Hyun Sil Kim, Jong In Yook, Jiwon Choi, Kyoung Tai No
Protein-protein interactions (PPIs), which are essential for cellular processes, have been recognized as attractive therapeutic targets. Therefore, the construction of a PPI-focused chemical library is an inevitable necessity for future drug discovery. Natural products have been used as traditional medicines to treat human diseases for millennia; in addition, their molecular scaffolds have been used in diverse approved drugs and drug candidates. The recent discovery of the ability of natural products to inhibit PPIs led us to use natural products as a chemical library for PPI-targeted drug discovery...
October 27, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/29136524/anticancer-metal-n-heterocyclic-carbene-complexes-of-gold-platinum-and-palladium
#20
REVIEW
Taotao Zou, Chun-Nam Lok, Pui-Ki Wan, Zhi-Feng Zhang, Sin-Ki Fung, Chi-Ming Che
Transition metal compounds are a rich source for anticancer drug development. Judicious application of coordination ligands is a critical success factor in the design of effective anti-tumor compounds. N-heterocyclic carbenes (NHC) are stable ligands that have strong donor strengths in stabilizing metal ions and versatility in structural modifications to provide diverse scaffolds for biological molecular targeting. Remarkable advances have been achieved in the development of metal NHC complexes as anticancer as well as theranostic agents...
November 10, 2017: Current Opinion in Chemical Biology
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