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https://www.readbyqxmd.com/read/28220869/nitric-oxide-is-involved-in-the-oxytetracycline-induced-suppression-of-root-growth-through-inhibiting-hydrogen-peroxide-accumulation-in-the-root-meristem
#1
Qing-Xiang Yu, Golam Jalal Ahammed, Yan-Hong Zhou, Kai Shi, Jie Zhou, Yunlong Yu, Jing-Quan Yu, Xiao-Jian Xia
Use of antibiotic-contaminated manure in crop production poses a severe threat to soil and plant health. However, few studies have studied the mechanism by which plant development is affected by antibiotics. Here, we used microscopy, flow cytometry, gene expression analysis and fluorescent dyes to study the effects of oxytetracycline (OTC), a widely used antibiotic in agriculture, on root meristem activity and the accumulation of hydrogen peroxide (H2O2) and nitric oxide (NO) in the root tips of tomato seedlings...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28214645/antibiotics-do-not-affect-the-degradation-of-fungicides-and-enhance-the-mineralization-of-chlorpyrifos-in-biomixtures
#2
Humberto Castillo-González, Marta Pérez-Villanueva, Mario Masís-Mora, Víctor Castro-Gutiérrez, Carlos E Rodríguez-Rodríguez
The use of antibiotics in agriculture produces residues in wastewaters. The disposal of such wastewaters in biopurification systems (BPS) employed for the treatment of pesticides could result in the inhibition of the degrading capacity of the biomixtures used in the BPS. We assayed the effect of two commercial formulations of antibiotics used in agriculture, one containing kasugamycin (KSG) and the other oxytetracycline plus gentamicin (OTC+GTM), on the biomixture performance. Doses from 0.1mgkg(-1) to 1000mgkg(-1) of KSG increased the respiration of the biomixture, and low doses enhanced the mineralization rate of the insecticide (14)C-chlorpyrifos...
February 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28205376/drug-drug-interactions-in-pediatric-oncology-patients
#3
T E Balk, I H van der Sijs, T van Gelder, J J B Janssen, I M van der Sluis, R W F van Leeuwen, F K Engels
BACKGROUND: Drug-drug interactions (DDIs) can negatively affect pharmacotherapy. However, pediatric DDI studies are scarce. We undertook an exploratory study to investigate prevalence and clinical relevance of DDIs between cytostatic and noncytostatic drugs in outpatient pediatric oncology patients. PROCEDURE: After informed consent and inclusion, the following information was collected: currently prescribed noncytostatic and cytostatic drugs, comorbidities, and use of over-the-counter (OTC) drugs, complementary and alternative medicines (CAMs), and dietary supplements...
February 16, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28188892/the-dental-monomer-hydroxyethyl-methacrylate-hema-counteracts-lipopolysaccharide-induced-il-1%C3%AE-release-possible-role-of-glutathione
#4
Anette Kocbach Bolling, Anita Solhaug, Else Morisbak, Jørn A Holme, Jan Tore Samuelsen
Methacrylate monomers, like 2-hydroxyethyl methacrylate (HEMA), are common components of resin based dental materials. Leakage of unpolymerized monomers after placement and curing leads to human exposure. HEMA is known to inhibit lipopolysaccharide (LPS) induced cytokine release. In this study we explore a possible role of the antioxidant glutathione (GSH) in this effect. In the RAW 264.7 murine macrophage cell line, HEMA (<2mM) did not induce cell death, but reduced cellular GSH levels, increased cellular ROS and decreased the IL-1β release from LPS-stimulated cells...
February 7, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28187744/medication-use-by-middle-aged-and-older-participants-of-an-exercise-study-results-from-the-brain-in-motion-study
#5
Tania Pannu, Sarah Sharkey, Grazyna Burek, Daniela Cretu, Michael D Hill, David B Hogan, Marc J Poulin
BACKGROUND: Over the past 50 years, there has been an increase in the utilization of prescribed, over-the-counter (OTC) medications, and natural health products. Although it is known that medication use is common among older persons, accurate data on the patterns of use, including the quantity and type of medications consumed in a generally healthy older population from a Canadian perspective are lacking. In this study, we study the pattern of medication use in a sedentary but otherwise healthy older persons use and determined if there was an association between medication use and aerobic fitness level...
February 10, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28153276/ultrasensitive-sers-aptasensor-for-the-detection-of-oxytetracycline-based-on-a-gold-enhanced-nano-assembly
#6
Fanwei Meng, Xiaoyuan Ma, Nuo Duan, Shijia Wu, Yu Xia, Zhouping Wang, Baocai Xu
This paper investigated a new detection method of oxytetracycline (OTC) in aquatic products with ultrasensitive detection limit. The method was constructed on the basis of raman hot spot between gold nanoparticles (AuNPs) (13nm and 80nm diameter respectively) linked by an DNA sequence. The DNA sequence combined with the OTC aptamer including its complementary sequence as well as a stem-loop structure. The raman signal molecule (4-MBA) was modified at the surface of 13nm AuNPs. After the exposure of OTC, the aptamer sequence was preferentially combined with OTC and partially dehybridized with its complementary sequence which led the 13nm AuNPs to get more closer to the 80nm AuNPs...
April 1, 2017: Talanta
https://www.readbyqxmd.com/read/28152408/toxic-responses-of-swimming-crab-portunus-trituberculatus-larvae-exposed-to-environmentally-realistic-concentrations-of-oxytetracycline
#7
Xianyun Ren, Zhuqing Wang, Baoquan Gao, Ping Liu, Jian Li
Oxytetracycline (OTC) is the most commonly used antibiotics for bacterial treatment in crustacean farming in China, and because of their intensive use, the potential harmful effects on aquatic organisms are of great concern. The aim of this study was to investigate the effects of oxytetracycline (OTC) on the antioxidant system, detoxification progress, and biomolecule damage in Portunus trituberculatus larvae. In this study, larvae that belonged to four zoeal stages were exposed to four different concentrations of OTC (0, 0...
January 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28149015/role-of-bioflavonoid-quercetin-on-expression-of-urea-cycle-enzymes-astrocytic-and-inflammatory-markers-in-hyperammonemic-rats
#8
Sivamani Kanimozhi, Perumal Subramanian, Sakkaravarthy Shanmugapriya, Subramanian Sathishkumar
This study evaluates the role of quercetin on the expression of urea cycle enzymes, astrocytic, neuronal and inflammatory markers in hyperammonemic rats. Hyperammonemia (provoked by intraperitonial injections of (ammonium chloride-100 mg/kg b.w for 56 days), showed diminished expression of urea cycle enzymes [carbamyl phosphate synthetase-1 (CPS-1), ornithine transcarbamylase (OTC), argininosuccinate synthetase (ASS) and arginase (ARG)] in liver and decreased expression of neuronal and astrocytic markers-glutamine synthase (GS) and phosphate activated glutaminase (PAG) in brain and increased expression of brain inflammatory markers such as interleukin 6 (IL6), inducible nitric oxide synthase (iNOS) and nuclear transcription factor kappa B (NF-κB) (by western blot analysis) and exhibited downregulated expression of soluble guanylate cyclase (sGC), glial fibrillary acidic protein (GFAP) in brain and ASS in liver investigated (by RT-PCR)...
March 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28135825/il-10-gene-polymorphisms-and-self-medication-with-over-the-counter-nonsteroidal-anti-inflammatory-drugs
#9
Stephen J Walsh
BACKGROUND: Genetic influences on self-medication with over-the-counter (OTC) drugs merit investigation. For example, patients frequently use OTC nonsteroidal anti-inflammatory drugs (NSAIDs) to treat inflammation, but the inflammatory response is also affected by endogenous cytokines whose production varies across polymorphisms of their encoding genes. In the case of interleukin 10 (IL-10), literature suggests that a single nucleotide polymorphism (SNP) in the promoter region of the cytokine's gene (-1082 A > G [rs1800896]) influences production with higher levels associated with G variant alleles...
January 1, 2017: Biological Research for Nursing
https://www.readbyqxmd.com/read/28130022/improving-over-the-counter-medication-safety-for-older-adults-a-study-protocol-for-a-demonstration-and-dissemination-study
#10
Michelle A Chui, Jamie A Stone, Richard J Holden
BACKGROUND: Adverse drug events (ADEs) associated with over-the-counter (OTC) medications cause 178,000 hospitalizations each year. Older adults, aged 65 and older, are particularly vulnerable to ADEs. Of the 2.2 million older adults considered at risk for a major ADE, more than 50% are at risk due to concurrent use of an OTC and prescription medication. OBJECTIVES: To refine the intervention and implementation strategy through diagnostic and formative evaluation; to evaluate the effectiveness of the intervention for preventing misuse of high-risk OTC medications by older adults; and to evaluate the implementation of the intervention in community pharmacies...
January 24, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28126353/auditing-access-to-outpatient-rehabilitation-services-for-children-with-traumatic-brain-injury-and-public-insurance-in-washington-state
#11
Molly M Fuentes, Leah Thompson, D Alex Quistberg, Wren L Haaland, Karin Rhodes, Deborah Kartin, Cheryl Kerfeld, Susan Apkon, Ali Rowhani-Rahbar, Frederick P Rivara
OBJECTIVE: Identify insurance-based disparities in access to outpatient pediatric neurorehabilitation services. DESIGN: Audit study, with paired calls where callers posed as a mother seeking services for a simulated child with history of severe traumatic brain injury (TBI) and public or private insurance. SETTING: Outpatient rehabilitation clinics in Washington State PARTICIPANTS: 195 physical therapy clinics (PTc), 109 occupational therapy clinics (OTc), 102 speech therapy clinics (STc) and 11 rehabilitation medicine clinics INTERVENTIONS: None MAIN OUTCOME MEASURES: Acceptance of public insurance, business days until the next available appointment...
January 23, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28123551/cell-death-in-a-co-culture-of-hepatocellular-carcinoma-cells-and-human-umbilical-vascular-endothelial-cells-in-a-medium-lacking-glucose-and-arginine
#12
Minoru Tomizawa, Fuminobu Shinozaki, Yasufumi Motoyoshi, Takao Sugiyama, Shigenori Yamamoto, Naoki Ishige
Human primary hepatocytes are able to survive in a medium without glucose and arginine that is instead supplemented with galactose and ornithine (hepatocyte selection medium; HSM). This is because the cells produce glucose and arginine by the action of galactokinase (GALK) and ornithine carbamoyltransferase (OTC), respectively. It was expected that hepatocellular carcinoma (HCC) cells do not survive in HSM. In the current study, HCC cell lines (namely HLE, HLF, PLC/PRL/5, Hep3B and HepG2) and human umbilical vascular endothelial cells (HUVECs) were cultured in HSM, and the expression levels of GALK1, GALK2 and OTC were analyzed by reverse transcription-quantitative polymerase chain reaction...
January 2017: Oncology Letters
https://www.readbyqxmd.com/read/28122846/self-medication-among-people-living-with-hypertension-a-review
#13
REVIEW
Riana Rahmawati, Beata V Bajorek
BACKGROUND: Self-medication is commonly practised by patients, underpinned by health beliefs that affect their adherence to medication regimens, and impacting on treatment outcomes. OBJECTIVES: This review explores the scope of self-medication practices among people with hypertension, in terms of the scale of use, types of medication and influencing factors. METHOD: A comprehensive search of English language, peer-reviewed literature published between 2000 and 2014 was performed...
January 24, 2017: Family Practice
https://www.readbyqxmd.com/read/28120869/change-in-microbial-community-in-landfill-refuse-contaminated-with-antibiotics-facilitates-denitrification-more-than-the-increase-in-arg-over-long-term
#14
Dong Wu, Guanzhou Chen, Xiaojun Zhang, Kai Yang, Bing Xie
In this study, the addition of sulfamethazine (SMT) to landfill refuse decreased nitrogen intermediates (e.g. N2O and NO) and dinitrogen (N2) gas fluxes to <0.5 μg-N/kg-refuse·h(-1), while the N2O and N2 flux were at ~1.5 and 5.0 μg-N/kg-refuse·h(-1) respectively in samples to which oxytetracycline (OTC) had been added. The ARG (antibiotic resistance gene) levels in the refuse increased tenfold after long-term exposure to antibiotics, followed by a fourfold increase in the N2 flux, but SMT-amended samples with the largest resistome facilitated the denitrification (the nitrogen accumulated as NO gas at ~6 μg-N/kg-refuse·h(-1)) to a lesser extent than OTC-amended samples...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28115862/efficacy-of-a-twice-daily-3-step-over-the-counter-skincare-regimen-for-the-treatment-of-acne-vulgaris
#15
Katie Rodan, Kathy Fields, Timothy J Falla
BACKGROUND: Acne vulgaris (acne) is the most common skin disorder producing physical and emotional scars that can persist for years. An estimated 83% of acne sufferers self-treat, but there is lack of studies documenting the effectiveness of over-the-counter (OTC) acne treatment products. OBJECTIVE: This study was conducted to determine the effectiveness of an OTC, 3-step, anti-acne skincare regimen in treating acne and improving the appearance of red/inflamed facial skin...
2017: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/28110635/development-of-a-quantum-dot-based-immunochromatography-test-strip-for-rapid-screening-of-oxytetracycline-and-4-epi-oxytetracycline-in-edible-animal-tissues
#16
Yong Xie, Lei Zhang, Xian Yang, Tao Le
A rapid and sensitive immunochromatographic test strip (ICTS) was developed in a competitive format with the quantum dot-conjugated monoclonal antibody specifically to determine the residues of oxytetracycline (OTC) and its metabolite 4-epi-oxytetracycline (4-epi-OTC). Using an ICTS reader, the 50% inhibition concentration (IC50) was found to be 3.41 ± 0.29 ng ml(-)(1) of OTC in phosphate-buffered saline samples and the detection limit was 0.44 ± 0.05 ng ml(-)(1). The visual cut-off level of the ICTS is 25 ng ml(-)(1)...
March 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28109919/the-ozone-like-syndrome-in-durum-wheat-triticum-durum-desf-mechanisms-underlying-the-different-symptomatic-responses-of-two-sensitive-cultivars
#17
Valentina Picchi, Robert Monga, Riccardo Marzuoli, Giacomo Gerosa, Franco Faoro
Colombo and Sculptur are two modern durum wheat cultivars that, in previous studies, proved to be very sensitive to ozone injury in terms of eco-physiological parameters and significant grain yield loss. Nevertheless, their response regarding leaf visible symptoms was very different; Sculptur showed almost no symptoms, even after several weeks of ozone exposure, whereas Colombo showed in a few weeks typical ozone-like symptoms (chlorotic/necrotic spots). The mechanisms underlying this different response has been studied with a biochemical and microscopical approach...
January 12, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28107167/activity-of-the-liver-enzyme-ornithine-carbamoyltransferase-otc-in-blood-lc-ms-ms-assay-for-non-invasive-diagnosis-of-ornithine-carbamoyltransferase-deficiency
#18
Jakub Krijt, Jitka Sokolová, Pavel Ješina, Lenka Dvořáková, Martin Řeboun, Katarína Brennerová, Martin Mistrík, Jiří Zeman, Tomáš Honzík, Viktor Kožich
BACKGROUND: Liver enzymes are released from hepatocytes into circulation and their activity can be measured in the blood. We examined whether the plasma activity of the liver enzyme ornithine carbamoyltransferase, determined by a novel liquid chromatography-mass spectrometry (LC-MS/MS) assay, could be utilized for the detection of OTC deficiency (OTCD), an X-linked inborn error of the urea cycle. METHODS: The plasma ornithine carbamoyltransferase (OTC) activity was assayed in the reverse reaction using isotopically labeled citrulline-d4 as a substrate and by determination of the product, ornithine-d4, by LC-MS/MS analysis...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28103276/comparison-of-the-effect-of-two-kinds-of-iranian-honey-and-diphenhydramine-on-nocturnal-cough-and-the-sleep-quality-in-coughing-children-and-their-parents
#19
Parviz Ayazi, Abolfazl Mahyar, Mahdieh Yousef-Zanjani, Abbas Allami, Neda Esmailzadehha, Taraneh Beyhaghi
Coughing in a child induced by upper respiratory tract infections (URTIs) can be a problem, both for the child and its parents. Current studies show a lack of proven efficacy for over-the counter (OTC) medications, but promising data support the use of honey for children. The aim of this study was to compare the effects of two kinds of Iranian honey with diphenhydramine (DPH) on nocturnal pediatric coughs and the sleep quality of children and their parents. This was a clinical trial (registered in IRCT; No...
2017: PloS One
https://www.readbyqxmd.com/read/28095580/split-face-comparison-of-an-advanced-non-hydroquinone-lightening-solution-to-4-hydroquinone
#20
Joel Schlessinger, Subhash Saxena, Stuart Mohr
INTRODUCTION: Hyperpigmentation is a primary concern for many cosmetic patients because of its high rate of occurrence and significant impact on perceived age. While 4% hydroquinone has been the gold-standard of treatment, there is a growing interest in non-hydroquinone solutions, however, many of these newer solutions fail to deliver equivalent improvement. METHODS: This double-blind, randomized, split-face study compares the effects of a new OTC non-hydroquinone lightening product (JM) to an available 4% hydroquinone lightening solution (OB) on the appearance of hyperpigmentation, texture, and ne lines and wrinkles...
December 1, 2016: Journal of Drugs in Dermatology: JDD
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