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https://www.readbyqxmd.com/read/29145169/a-zinc-schiff-base-complex-inhibits-cancer-progression-both-in-vivo-and-in-vitro-by-inducing-apoptosis
#1
Arpita Banerjee, Kaushik Banerjee, Abhinaba Sinha, Satyajit Das, Saikat Majumder, Subrata Majumdar, Soumitra Kumar Choudhuri
Cancer chemotherapy suffers from selectivity and undesired toxicity of the drugs. Since zinc is a biocompatible tracer element and cysteine derivatives are used in cancer chemoprevention, we intend to develop a complex of zinc and cysteine-derivatives as potent, non-toxic anticancer agents. Herein, we synthesized and characterized cysteine based ligand, 2-[(2-Hydroxy-3-methoxy-benzylidene)-amino]-3-mercapto-propionic acid and its Zn-complex, which are found to be non-toxic towards normal human PBMC. Data also revealed that only Zn-complex exhibited remarkable apoptosis in drug-sensitive CCRF-CEM and multidrug-resistant CEM/ADR5000 cancer cells as assessed by MTT, Cell cycle and AnnexinV binding assay...
November 6, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29145163/spread-of-multidrug-resistant-escherichia-coli-harboring-integron-via-swine-farm-waste-water-treatment-plant
#2
Jin-Hyeong Park, Young-Ji Kim, Binn-Kim, Kun-Ho Seo
Wastewater treatment plants (WWTPs) that release treated wastewater into the environment have emerged as a major threat to public health. In this study, we investigated Escherichia coli load and antibiotic-resistance profiles across different treatment processes at a swine farm WWTP. The frequency of the detection of class 1 and 2 integrons, and their association with antibiotic resistance, were also analyzed. Samples were obtained at each of five sampling sites that represented each processing step within the WWTP...
November 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29144724/structure-based-analysis-of-boronic-acids-as-inhibitors-of-acinetobacter-derived-cephalosporinase-7-adc-7-a-unique-class-c-%C3%AE-lactamase
#3
Alexandra A Bouza, Hollister C Swanson, Kali A Smolen, Alison L VanDine, Magdalena A Taracila, Chiara Romagnoli, Emilia Caselli, Fabio Prati, Robert A Bonomo, Rachel A Powers, Bradley J Wallar
Acinetobacter baumannii is a multidrug resistant pathogen that infects more than 12,000 patients each year in the US. Much of the resistance to β-lactam antibiotics in Acinetobacter spp. is a result of class C β-lactamases known as Acinetobacter-derived cephalosporinases (ADCs). ADCs are unaffected by clinically used -lactam-based β-lactamase inhibitors. In this study, five boronic acid transition state analog inhibitors (BATSIs) were evaluated for inhibition of the class C cephalosporinase ADC-7. Our goal was to explore the properties of BATSIs designed to probe the R1 binding site...
November 16, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29144223/no-touch-disinfection-methods-to-decrease-multidrug-resistant-organism-infections-a-systematic-review-and-meta-analysis
#4
Alexandre R Marra, Marin L Schweizer, Michael B Edmond
BACKGROUND Recent studies have shown that using no-touch disinfection technologies (ie, ultraviolet light [UVL] or hydrogen peroxide vapor [HPV] systems) can limit the transmission of nosocomial pathogens and prevent healthcare-associated infections (HAIs). To investigate these findings further, we performed a systematic literature review and meta-analysis on the impact of no-touch disinfection methods to decrease HAIs. METHODS We searched PubMed, CINAHL, CDSR, DARE and EMBASE through April 2017 for studies evaluating no-touch disinfection technology and the nosocomial infection rates for Clostridium difficile, methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci (VRE), and other multidrug-resistant organisms (MDROs)...
November 16, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29143876/deregulation-of-genes-associated-with-alternate-drug-resistance-mechanisms-in-mycobacterium-tuberculosis
#5
Kalpana Sriraman, Kayzad Nilgiriwala, Dhananjaya Saranath, Anirvan Chatterjee, Nerges Mistry
Alternate mechanisms of drug resistance involving intrinsic defense pathways play an important role in development of drug resistance. Deregulation of drug efflux, cellular metabolism, and DNA repair have been indicated to have effect on drug tolerance and persistence. Here we chose eight genes from these pathways to investigate their association with development of multidrug resistance (MDR). We generated mono drug resistant and MDR strains of rifampicin and isoniazid and examined the differential expression of genes belonging to efflux, DNA repair and cell wall lipid synthesis pathways...
November 16, 2017: Current Microbiology
https://www.readbyqxmd.com/read/29143332/accurate-prediction-and-elucidation-of-drug-resistance-based-on-the-robust-and-reproducible-chemoresponse-communities
#6
Enyu Dai, Jing Wang, Feng Yang, Xu Zhou, Qian Song, Shuyuan Wang, Xuexin Yu, Dianming Liu, Qian Yang, Hong Dai, Wei Jiang, Hong Ling
Selecting the available treatment for each cancer patient from genomic context is a core goal of precision medicine, but innovative approaches with mechanism interpretation and improved performance are still highly needed. Through utilizing in vitro chemotherapy response data coupled with gene and miRNA expression profiles, we applied a network-based approach that identified markers not as individual molecules but as functional groups extracted from the integrated transcription factor and miRNA regulatory network...
November 16, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29142609/role-of-5-aza-cdr-in-mitomycin-c-chemosensitivity-of-t24-bladder-cancer-cells
#7
Hui-Hui Zhang, Bo Huang, You-Han Cao, Qing Li, Han-Feng Xu
Chemotherapeutic insensitivity is one of key obstacles to effectively treating muscle invasive bladder cancer. 5-Aza-2'-deoxycytidine (5-Aza-CdR) has been identified as a tumor suppressive agent in various types of cancer. The aim of the present study was to identify the effects of 5-Aza-CdR on the mitomycin-C (MMC) chemosensitivity of T24 bladder cancer cells and investigate the underlying mechanisms. T24 cells were treated with a combination of MMC and 5-Aza-CdR at various concentrations. The rates of proliferation and apoptosis were assessed by an MTT assay and flow cytometry, respectively...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29142389/bioactive-constituents-radical-scavenging-and-antibacterial-properties-of-the-leaves-and-stem-essential-oils-from-peperomia-pellucida-l-kunth
#8
Sunday O Okoh, Benson C Iweriebor, Omobola O Okoh, Anthony I Okoh
Background: Peperomia pellucida is an annual herbaceous ethnomedicinal plant used in the treatment of a variety of communicable and noncommunicable diseases in the Amazon region. Objective: The study aimed at profiling the bioactive constituents of the leaves and stem essential oils (LEO and SEO) of P. pellucida, their in vitro antibacterial and radical scavenging properties as probable lead constituents in the management of oxidative stress and infectious diseases...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142066/characterization-of-sgn-cd123a-a-potent-cd123-directed-antibody-drug-conjugate-for-acute-myeloid-leukemia
#9
Fu Li, May Kung Sutherland, Changpu Yu, Roland B Walter, Lori Westendorf, John Valliere-Douglass, Lucy Pan, Ashley Cronkite, Django Sussman, Kerry Klussman, Michelle Ulrich, Martha E Anderson, Ivan J Stone, Weiping Zeng, Mechthild Jonas, Timothy S Lewis, Maitrayee Goswami, Sa A Wang, Peter D Senter, Che-Leung Law, Eric J Feldman, Dennis R Benjamin
Treatment choices for acute myeloid leukemia (AML) patients resistant to conventional chemotherapies are limited and novel therapeutic agents are needed. Interleukin-3 receptor alpha (IL-3Rα, or CD123) is expressed on the majority of AML blasts and there is evidence that its expression is increased on leukemic relative to normal hematopoietic stem cells, which makes it an attractive target for antibody-based therapy. Here we report the generation and preclinical characterization of SGN-CD123A, an antibody-drug conjugate utilizing the pyrrolobenzodiazepine dimer (PBD) linker and a humanized CD123 antibody with engineered cysteines for site-specific conjugation...
November 15, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29141758/in-vitro-sensitivity-of-pyronaridine-in-thai-isolates-of-plasmodium-falciparum
#10
Kittiya Mahotorn, Peerapan Tan-Ariya, Thunyapit Thita, Toon Ruang-Areerate, Naruemon Sittichot, Nantana Suwandittakul, Mathirut Mungthin
Pyronaridine, a Mannich base antimalarial agent with a high activity against chloroquine-resistant Plasmodium falciparum, has been combined with artesunate as a new artemisinin derivative-based combination therapy (ACT). Pyronaridine-artesunate combination could be one of the choices for the treatment of uncomplicated falciparum malaria in multidrug-resistant areas including Thailand. The aim of this study was to determine in vitro sensitivity and cross-resistance pattern of pyronaridine in Thai isolates of P...
October 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141347/-antimicrobial-resistance-and-molecular-subtypes-of-salmonella-typhi-and-salmonella-paratyphoid-isolates-from-jiangsu-province-2012-2015
#11
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/29141051/molecular-and-epidemiological-characterization-of-carbapenemase-producing-enterobacteriaceae-in-norway-2007-to-2014
#12
Ørjan Samuelsen, Søren Overballe-Petersen, Jørgen Vildershøj Bjørnholt, Sylvain Brisse, Michel Doumith, Neil Woodford, Katie L Hopkins, Bettina Aasnæs, Bjørg Haldorsen, Arnfinn Sundsfjord
The prevalence of carbapenemase-producing Enterobacteriaceae (CPE) is increasing worldwide. Here we present associated patient data and molecular, epidemiological and phenotypic characteristics of all CPE isolates in Norway from 2007 to 2014 confirmed at the Norwegian National Advisory Unit on Detection of Antimicrobial Resistance. All confirmed CPE isolates were characterized pheno- and genotypically, including by whole genome sequencing (WGS). Patient data were reviewed retrospectively. In total 59 CPE isolates were identified from 53 patients...
2017: PloS One
https://www.readbyqxmd.com/read/29140706/a-galactosylated-pro-drug-of-ursodeoxycholic-acid-design-synthesis-characterization-and-pharmacological-effects-in-a-rat-model-of-estrogen-induced-cholestasis
#13
Francesca Di Guida, Claudio Pirozzi, Salvatore Magliocca, Anna Santoro, Adriano Lama, Roberto Russo, Maria Nieddu, Lucia Burrai, Gianpiero Boatto, Maria Pina Mollica, Federica Sodano, Loretta Lazzarato, Konstantin Chegaev, Rosaria Meli, Giuseppina Mattace Raso, Maria Grazia Rimoli
Ursodeoxycholic acid (UDCA) is considered the first-choice therapy for cholestatic disorders. To enhance solubility and exploit specific transporters in liver, we synthesized a new galactosyl pro-drug of UDCA (UDCAgal). Ethinylestradiol (EE)-induced cholestasis was used to study and compare the effects of UDCAgal with UDCA on bile flow, hepatic canalicular efflux transporter expression, and inflammation. UDCAgal resulted quite stable both at pH 7.4 and 1.2 and regenerated the parent drug after incubation in human plasma...
November 15, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29140081/the-human-milk-glycome-as-a-defense-against-infectious-diseases-rationale-challenges-and-opportunities
#14
Kelly M Craft, Steven D Townsend
Each year over 3 million people die from infectious diseases with most of these deaths being poor and young children who live in low- and middle-income countries. Infectious diseases emerge for a multitude of reasons. On the social front, reasons include a breakdown of public health standards, international travel, and immigration (for financial, civil, and social reasons). At the molecular level, the modern rise of infectious diseases is tied to the juxtaposition of drug-resistant pathogens and a lack of new antimicrobials...
November 15, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29138583/efficacy-of-intravenous-tigecycline-in-patients-with-acinetobacter-complex-infections-results-from-14-phase-iii-and-phase-iv-clinical-trials
#15
Hal Tucker, Michele Wible, Ashesh Gandhi, Alvaro Quintana
Background: Acinetobacter infections, especially multidrug-resistant (MDR) Acinetobacter infections, are a global health problem. This study aimed to describe clinical outcomes in patients with confirmed Acinetobacter spp. isolates who were treated with tigecycline in randomized clinical trials. Materials and methods: Data from 14 multinational, randomized (open-label or double-blind), and active-controlled (except one) Phase III and IV studies were analyzed using descriptive statistics...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29138561/a-simple-reduction-sensitive-micelles-co-delivery-of-paclitaxel-and-dasatinib-to-overcome-tumor-multidrug-resistance
#16
Jun Li, Ruitong Xu, Xiao Lu, Jing He, Shidai Jin
Multidrug resistance (MDR) is one of the major obstacles in successful chemotherapy. The combination of chemotherapy drugs and multidrug-resistant reversing agents for treating MDR tumor is a good strategy to overcome MDR. In this work, we prepared the simple redox-responsive micelles based on mPEG-SS-C18 as a co-delivery system to load the paclitaxel (PTX) and dasatinib (DAS) for treatment of MCF-7/ADR cells. The co-loaded micelles had a good dispersity and a spherical shape with a uniform size distribution, and they could quickly disassemble and rapidly release drugs under the reduction environment...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29138537/development-of-novel-ultrashort-antimicrobial-peptide-nanoparticles-with-potent-antimicrobial-and-antibiofilm-activities-against-multidrug-resistant-bacteria
#17
Ammar Almaaytah, Gubran Khalil Mohammed, Ahmad Abualhaijaa, Qosay Al-Balas
Conventional antibiotics are facing strong microbial resistance that has recently reached critical levels. This situation is leading to significantly reduced therapeutic potential of a huge proportion of antimicrobial agents currently used in clinical settings. Antimicrobial peptides (AMPs) could provide the medical community with an alternative strategy to traditional antibiotics for combating microbial resistance. However, the development of AMPs into clinically useful antibiotics is hampered by their relatively low stability, toxicity, and high manufacturing costs...
2017: Drug Design, Development and Therapy
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
#18
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/29138424/structure-function-relationships-in-abcg2-insights-from-molecular-dynamics-simulations-and-molecular-docking-studies
#19
Ricardo J Ferreira, Cátia A Bonito, M Natália D S Cordeiro, Maria-José U Ferreira, Daniel J V A Dos Santos
Efflux pumps of the ATP-binding cassette transporters superfamily (ABC transporters) are frequently involved in the multidrug-resistance (MDR) phenomenon in cancer cells. Herein, we describe a new atomistic model for the MDR-related ABCG2 efflux pump, also named breast cancer resistance protein (BCRP), based on the recently published crystallographic structure of the ABCG5/G8 heterodimer sterol transporter, a member of the ABCG family involved in cholesterol homeostasis. By means of molecular dynamics simulations and molecular docking, a far-reaching characterization of the ABCG2 homodimer was obtained...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138303/cxc-chemokines-exhibit-bactericidal-activity-against-multidrug-resistant-gram-negative-pathogens
#20
Matthew A Crawford, Debra J Fisher, Lisa M Leung, Sara Lomonaco, Christine Lascols, Antonio Cannatelli, Tommaso Giani, Gian Maria Rossolini, Yohei Doi, David R Goodlett, Marc W Allard, Shashi K Sharma, Erum Khan, Robert K Ernst, Molly A Hughes
The continued rise and spread of antimicrobial resistance among bacterial pathogens pose a serious challenge to global health. Countering antimicrobial-resistant pathogens requires a multifaceted effort that includes the discovery of novel therapeutic approaches. Here, we establish the capacity of the human CXC chemokines CXCL9 and CXCL10 to kill multidrug-resistant Gram-negative bacteria, including New Delhi metallo-beta-lactamase-1-producing Klebsiella pneumoniae and colistin-resistant members of the family Enterobacteriaceae that harbor the mobile colistin resistance protein MCR-1 and thus possess phosphoethanolamine-modified lipid A...
November 14, 2017: MBio
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