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https://www.readbyqxmd.com/read/29684873/seabird-colonies-as-relevant-sources-of-pollutants-in-antarctic-ecosystems-part-1-trace-elements
#1
C V Z Cipro, P Bustamante, M V Petry, R C Montone
Global distillation is classically pointed as the biggest responsible for contaminant inputs in Polar ecosystems. Mercury (Hg) and other trace elements (TEs) also present natural sources, whereas the biologically mediated input is typically ignored. However, bioaccumulation and biomagnification combined with the fact that seabirds gather in large numbers into large colonies and excrete on land might represent an important local TEs input. A previous work suggested these colonies as sources of not only nutrients, but also organic contaminants...
March 24, 2018: Chemosphere
https://www.readbyqxmd.com/read/29579676/ciprofloxacin-vs-temperature-antibiotic-toxicity-in-the-free-floating-liverwort-ricciocarpus-natans-from-a-climate-change-perspective
#2
Marcelo Pedrosa Gomes, Júlio César Moreira de Brito, Elisa Monteze Bicalho, Janaína Guernica Silva, Maria de Fátima Gomides, Queila Souza Garcia, Cleber Cunha Figueredo
The physiological responses of the aquatic liverwort Ricciocarpus natans to ciprofloxacin (Cipro) exposure under different growth temperatures were investigated. Cipro appears to act as an inhibitor of mitochondrial Complex III by blocking the oxidation of quinol, resulting in the formation of hydrogen peroxide (H2 O2 ). H2 O2 accumulation upon Cipro exposure is responsible for decreased photosynthesis in plants. The amount of H2 O2 in plants is kept under control by antioxidant enzymes, whose activities are central to the responses of plants to Cipro yet are influenced by temperature...
March 19, 2018: Chemosphere
https://www.readbyqxmd.com/read/29578687/esterase-catalyzed-siderophore-hydrolysis-activates-an-enterobactin-ciprofloxacin-conjugate-and-confers-targeted-antibacterial-activity
#3
Wilma Neumann, Martina Sassone-Corsi, Manuela Raffatellu, Elizabeth M Nolan
Enteric Gram-negative bacteria, including Escherichia coli, biosynthesize and deploy the triscatecholate siderophore enterobactin (Ent) in the vertebrate host to acquire iron, an essential nutrient. We report that Ent-Cipro, a synthetic siderophore-antibiotic conjugate based on the native Ent platform that harbors an alkyl linker at one of the catechols with a ciprofloxacin cargo attached, affords targeted antibacterial activity against E. coli strains that express the pathogen-associated iroA gene cluster...
March 26, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29578024/stimulus-responsive-zinc-oxide-functionalized-macromolecular-humic-acid-nanocarrier-for-enhancement-of-antibacterial-activity-of-ciprofloxacin-hydrochloride
#4
Gowri Murugesan, Latha Nachimuthu, Kannan Suganya, Marudhamuthu Murugan, Murugan A Munusamy, Mariappan Rajan
Macromolecular of naturally occurring humic acid (HA) have garnered interest in the chemical, biological and medicine industry owing to their unique behavior, i.e., strong adsorptive and non-toxic nature. Here, we investigated the functionalization of organic (HA) with inorganic (ZnO) hybrid nanoparticles for topical and site-targeted delivery of ciprofloxacin by simple emulsification techniques. Ciprofloxacin (CIPRO)-encapsulated hybrid nanocarrier constitute an attractive novel drug delivery vehicle for sustained release of antibiotics to bacterial infection sites in an extended and controlled manner...
March 22, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29573631/emerging-contaminants-and-nutrients-synergistically-affect-the-spread-of-class-1-integron-integrase-inti1-and-sul1-genes-within-stable-streambed-bacterial-communities
#5
Jèssica Subirats, Xisca Timoner, Alexandre Sànchez-Melsió, José Luis Balcázar, Vicenç Acuña, Sergi Sabater, Carles M Borrego
Wastewater effluents increase the nutrient load of receiving streams while introducing a myriad of anthropogenic chemical pollutants that challenge the resident aquatic (micro)biota. Disentangling the effects of both kind of stressors and their potential interaction on the dissemination of antibiotic resistance genes in bacterial communities requires highly controlled manipulative experiments. In this work, we investigated the effects of a combined regime of nutrients (at low, medium and high concentrations) and a mixture of emerging contaminants (ciprofloxacin, erythromycin, sulfamethoxazole, diclofenac, and methylparaben) on the bacterial composition, abundance and antibiotic resistance profile of biofilms grown in artificial streams...
March 10, 2018: Water Research
https://www.readbyqxmd.com/read/29564621/addition-of-doxycycline-to-ciprofloxacin-for-infection-prophylaxis-during-autologous-stem-cell-transplants-for-multiple-myeloma
#6
J M Sivik, J Davidson, C M Hale, J J Drabick, G Talamo
BACKGROUND: The most commonly used antibacterial prophylaxis during autologous stem cell transplants (ASCT) for multiple myeloma (MM) involves a fluoroquinolone, such as ciprofloxacin or levofloxacin. We assessed the impact of adding doxycycline to ciprofloxacin as routine antibacterial prophylaxis in these patients. METHODS: We retrospectively reviewed electronic medical records and our ASCT database to analyze rates and types of bacterial infections in MM patients who underwent ASCT in our institution...
March 21, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29484981/development-of-an-aqueous-ophthalmic-solution-with-an-enhanced-solubility-enrofloxacin-crystal-and-its-clinical-evaluation-in-dogs
#7
Jorge E Miranda-Calderon, Lilia Gutierrez, Luis Ocampo, Ponciano Garcia-Gutierrez, Graciela Tapia, Hector Sumano
BACKGROUND: There is a concern about the frequent use of ciprofloxacin in veterinary medicine is linked to increased antimicrobial resistance. The corresponding fluoroquinolone for veterinary use is enrofloxacin. A new solvate form of enrofloxacin, as dihydrate-hydrochloride (enro-C) with higher water solubility than the parent compound, was formulated as an ophthalmic solution (pH 5). A multicentre, longitudinal, non-inferiority clinical study in a non-hospital environment was designed to treat 36 dogs affected by tobramycin-unresponsive conjunctivitis with either the experimental 0...
February 26, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29412930/sample-preparation-combined-with-electroanalysis-to-improve-simultaneous-determination-of-antibiotics-in-animal-derived-food-samples
#8
Wesley Pereira da Silva, Luiz Henrique de Oliveira, André Luiz Dos Santos, Valdir Souza Ferreira, Magno Aparecido Gonçalves Trindade
A procedure based on liquid-liquid extraction (LLE) and phase separation using magnetically stirred salt-induced high-temperature liquid-liquid extraction (PS-MSSI-HT-LLE) was developed to extract and pre-concentrate ciprofloxacin (CIPRO) and enrofloxacin (ENRO) from animal food samples before electroanalysis. Firstly, simple LLE was used to extract the fluoroquinolones (FQs) from animal food samples, in which dilution was performed to reduce interference effects to below a tolerable threshold. Then, adapted PS-MSSI-HT-LLE protocols allowed re-extraction and further pre-concentration of target analytes in the diluted acid samples for simultaneous electrochemical quantification at low concentration levels...
June 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29407818/ciprofloxacin-by-products-in-seawater-environment-in-the-presence-and-absence-of-gilt-head-bream
#9
Haizea Ziarrusta, Leire Mijangos, Mireia Irazola, Ailette Prieto, Nestor Etxebarria, Eneritz Anakabe, Maitane Olivares, Olatz Zuloaga
The widespread use of pharmaceuticals has caused a growing concern on the presence of pharmaceuticals such as the antibiotic ciprofloxacin (CIPRO) in the aquatic environment, since they may exert adverse effects on non-target organisms, including fish. In order to study the uptake, distribution in different tissues (liver, muscle, brain and gill) and biofluids (plasma and bile), metabolism and elimination of CIPRO in gilt-head bream (Sparus aurata), controlled dosing experiments for 8 days at 200 μg/L concentration were carried out...
April 2018: Chemosphere
https://www.readbyqxmd.com/read/29278945/elastin-like-polypeptide-incorporated-thermally-sensitive-liposome-improve-antibiotic-therapy-against-musculoskeletal-bacterial-pathogens
#10
Adane S Nigatu, Harshini Ashar, Sri Nandhini Sethuraman, Rachel Wardlow, Danny Maples, Jerry Malayer, Ashish Ranjan
Musculoskeletal infections caused by bacteria such as Staphylococcus aureus and Pseudomonas aeruginosa in children and adults can lead to adverse outcomes including a need for extensive surgical debridement and limb amputation. To enable targeted antimicrobial release in infected tissues, the objective of this study was to design and investigate novel elastin-like polypeptide (ELP)-based thermally sensitive liposomes in vitro. ELP biopolymers can change their phase behaviour at higher temperatures. We hypothesised that ELP-TSL will improve therapeutic efficacy by releasing antimicrobial payloads locally at higher temperatures (≥39 °C)...
March 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29241384/effects-of-ciprofloxacin-and-quercetin-on-fetal-brain-development-a-biochemical-and-histopathological-study
#11
Zumrut Dogan, Aymelek Cetin, Ebru Elibol, Nigar Vardi, Yusuf Turkoz
PURPOSE: Teratogens cause birth defects and malformations while human development is being completed. In pregnancy, urinary tract infection (UTI) is a common health problem caused by bacteria. The fluoroquinolones such as ciprofloxacin, levofloxacin, moxifloxacin, and gemifloxacin can treat various types of bacterial infections successfully. The aim of this study is to determine whether the use of ciprofloxacin during pregnancy causes oxidative stress on brain tissues of the fetus, and whether quercetin contributes to prevent this damage if stress has already occurred...
January 10, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29235850/digital-protocol-for-chemical-analysis-at-ultralow-concentrations-by-surface-enhanced-raman-scattering
#12
Carlos Diego L de Albuquerque, Regivaldo G Sobral-Filho, Ronei J Poppi, Alexandre G Brolo
Single molecule surface-enhanced Raman spectroscopy (SM-SERS) has the potential to revolutionize quantitative analysis at ultralow concentrations (less than 1 nM). However, there are no established protocols to generalize the application of this technique in analytical chemistry. Here, a protocol for quantification at ultralow concentrations using SM-SERS is proposed. The approach aims to take advantage of the stochastic nature of the single-molecule regime to achieved lower limits of quantification (LOQ). Two emerging contaminants commonly found in aquatic environments, enrofloxacin (ENRO) and ciprofloxacin (CIPRO), were chosen as nonresonant molecular probes...
January 16, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29159694/urinary-excretion-of-ciprofloxacin-after-administration-of-extended-release-tablets-in-healthy-volunteers-swellable-drug-polyelectrolyte-matrix-versus-bilayer-tablets
#13
M L Guzmán, C B Romañuk, M F Sanchez, L C Luciani Giacobbe, L P Alarcón-Ramirez, F D Battistini, F L Alovero, A F Jimenez-Kairuz, R H Manzo, María Eugenia Olivera
This paper builds on a previous paper in which new ciprofloxacin extended-release tablets were developed based on a ciprofloxacin-based swellable drug polyelectrolyte matrix (SDPM-CIP). The matrix contains a molecular dispersion of ciprofloxacin ionically bonded to the acidic groups of carbomer, forming the polyelectrolyte-drug complex CB-CIP. This formulation showed that the release profile of the ciprofloxacin bilayer tablets currently commercialised can be achieved with a simpler strategy. Thus, since ciprofloxacin urine concentrations are associated with the clinical cure of urinary tract infections, the goal of this work was to compare the urinary excretion of SDPM-CIP tablets with those of the CIPRO XR® bilayer tablets...
February 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29149176/a-simple-way-for-targeted-delivery-of-an-antibiotic-in-vitro-evaluation-of-a-nanoclay-based-composite
#14
Leslie Valdés, Irela Pérez, Louis Charles de Ménorval, Ernesto Altshuler, Jon Otto Fossum, Aramis Rivera
The sodium-modified form of fluorohectorite nanoclay (NaFh) is introduced as a potential drug carrier, demonstrating its ability for the controlled release of the broad-spectrum antibiotic Ciprofloxacin through in vitro tests. The new clay-drug composite is designed to target the local infections in the large intestine, where it delivers most of the incorporated drug thanks to its pH-sensitive behavior. The composite has been conceived to avoid the use of coating technology and to decrease the side-effects commonly associated to the burst-release of the ciprofloxacin at the stomach level...
2017: PloS One
https://www.readbyqxmd.com/read/28958725/responses-of-the-nitrogen-fixing-aquatic-fern-azolla-to-water-contaminated-with-ciprofloxacin-impacts-on-biofertilization
#15
Marcelo Pedrosa Gomes, Júlio César Moreira de Brito, Marília Mércia Lima Carvalho Carneiro, Mariem Rodrigues Ribeiro da Cunha, Queila Souza Garcia, Cleber Cunha Figueredo
We investigated the ability of the aquatic fern Azolla to take up ciprofloxacin (Cipro), as well as the effects of that antibiotic on the N-fixing process in plants grown in medium deprived (-N) or provided (+N) with nitrogen (N). Azolla was seen to accumulate Cipro at concentrations greater than 160 μg g-1 dry weight when cultivated in 3.05 mg Cipro l-1 , indicating it as a candidate for Cipro recovery from water. Although Cipro was not seen to interfere with the heterocyst/vegetative cell ratios, the antibiotic promoted changes with carbon and nitrogen metabolism in plants...
January 2018: Environmental Pollution
https://www.readbyqxmd.com/read/28883168/evaluation-of-the-it-infrastructure-of-the-resist-study-with-the-evidence-based-cipros-checklist
#16
Doris Lindoerfer, Ulrich Mansmann
Efficient and powerful information systems are substantial to perform medical research projects successfully. Especially, translational medicine poses specific challenges to the corresponding IT infrastructure. The RESIST study is a translational research project in oncology where xenografts inform about patients second-line treatment. DBFORM, an in-house developed system, was used as EDC system. It was enhanced with project specific features. We demonstrate how the CIPROS checklist has the potential to optimize the related requirements engineering process...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28840183/data-for-the-elaboration-of-the-cipros-checklist-with-items-for-a-patient-registry-software-system-examples-and-explanations
#17
Doris Lindoerfer, Ulrich Mansmann
The data presented relates to the publication "Enhancing Requirements Engineering for Patient Registry Software Systems with Evidence-based Components" (Lindoerfer and Mansmann, 2017) [1], which describes the strategy behind the development of the CIPROS checklist. This manuscript also compares CIPROS with general requirements specification templates, and standards. The data is shortly described in Section 2.4 and presented in . The examples represent the material extracted from the literature used in qualitative analysis...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28734354/determination-of-aqueous-antibiotic-solutions-using-sers-nanogratings
#18
Koh Yiin Hong, Carlos Diego Lima de Albuquerque, Ronei J Poppi, Alexandre G Brolo
The emergence of antibiotics and their active metabolites in aquatic ecosystem has motivated the development of sensitive and reliable sensors to monitor traces of antibiotics and metabolites in drinking water sources (i.e. surface water). The surface enhanced Raman scattering (SERS) technique, which is widely recognized as a high sensitivity method for molecular vibrational detection, is potentially a powerful tool for trace environmental contamination analysis. The main goal of this work is to demonstrate pharmaceutical and metabolite multiplexing detection using the SERS approach...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28603782/socioeconomic-determinants-of-cipro-floxacin-resistant-shigella-infections-in-bangladeshi-children
#19
Randon J Gruninger, Russell A Johnson, Sumon K Das, Eric J Nelson, Emily S Spivak, John R Contreras, A S G Faruque, Daniel T Leung
BACKGROUND: Shigella species (spp.) are a leading cause of moderate to severe diarrhea in children worldwide. The recent emergence of quinolone-resistant Shigella spp. gives cause for concern, and South Asia has been identified as a reservoir for global spread. The influence of socioeconomic status on antimicrobial resistance in developing countries, such as those in South Asia, remains unknown. METHODS: We used data collected from 2009 to 2014 from a hospital specializing in the treatment of diarrhea in Dhaka, Bangladesh, to determine the relationship between Ciprofloxacin-resistant Shigella spp...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28536063/enhancing-requirements-engineering-for-patient-registry-software-systems-with-evidence-based-components
#20
Doris Lindoerfer, Ulrich Mansmann
INTRODUCTION: Patient registries are instrumental for medical research. Often their structures are complex and their implementations use composite software systems to meet the wide spectrum of challenges. Commercial and open-source systems are available for registry implementation, but many research groups develop their own systems. Methodological approaches in the selection of software as well as the construction of proprietary systems are needed. We propose an evidence-based checklist, summarizing essential items for patient registry software systems (CIPROS), to accelerate the requirements engineering process...
July 2017: Journal of Biomedical Informatics
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