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https://www.readbyqxmd.com/read/29161807/intravenous-dextran-70-infusion-has-protective-effects-on-ischemia-reperfusion-injury-of-kidney-an-experimental-study
#1
Atilla Semercioz, Mustafa Z Temiz, Ipek Erbarut, Ugur Izol, Serdar Aykan, Murat Tuken, Engin Kandirali
BACKGROUND: Renal ischemia-reperfusion (IR) leads to alterations of tubular epithelial cells, interstitial microvasculopathy and endothelial cell dysfunction in peritubular capillaries. Although dextrans have deteriorative effects on healthy kidney, their favorable effects on post-ischemic microvascular disturbances have been demonstrated. Therefore, we aimed to investigate in vivo effects of systemic Dextran 70 administration in kidney tissue with ischemia-reperfusion injury. METHODS: Twenty-one rats were allocated as sham, IR and IR+ Dextran 70 treatment groups...
November 21, 2017: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/29161504/solvent-and-temperature-effects-on-free-radical-formation-in-electronic-cigarette-aerosols
#2
Zachary T Bitzer, Reema Goel, Samantha M Reilly, Jonathan Foulds, Joshua Muscat, Ryan J Elias, John P Richie
The ever-evolving market of electronic cigarettes (e-cigarettes) presents a challenge for analyzing and characterizing the harmful products they can produce. Earlier we reported that e-cigarette aerosols can deliver high levels of reactive free radicals; however, there is little data characterizing the production of these potentially harmful oxidants. Thus, we have performed a detailed analysis of the different parameters affecting free radical production from e-cigarettes. Using a temperature controlled e-cigarette device and novel mechanism for reliably simulating e-cigarette usage conditions including coil activation and puff flow, we analyzed the effects of temperature, wattage, and e-liquid solvent composition of propylene glycol (PG) and glycerol (GLY) on radical production...
November 21, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29160958/prognostic-value-of-an-immunohistochemical-signature-in-patients-with-esophageal-squamous-cell-carcinoma-undergoing-radical-esophagectomy
#3
Jin Meng, Junhua Zhang, Yingjie Xiu, Yan Jin, Jiaqing Xiang, Yongzhan Nie, Shen Fu, Kuaile Zhao
Here, we aimed to identify an immunohistochemical (IHC)-based classifier as a prognostic factor in patients with esophageal squamous cell carcinoma (ESCC). A cohort of 235 patients with ESCC undergoing radical esophagectomy (with complete clinical and pathological information) were enrolled in the study. Using the least absolute shrinkage and selection operator (LASSO) regression model, we extracted six IHC features associated with progression-free survival (PFS) and then built a classifier in the discovery cohort (n=141)...
November 21, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/29160907/inhibition-effects-of-flavonoids-on-2-amino-3-8-dimethyl-imidazo-4-5-f-quinoxaline-and-2-amino-3-7-8-trimethyl-imidazo-4-5-f-quinoxaline-formation-and-alkoxy-radical-scavenging-capabilities-of-flavonoids-in-a-model-system
#4
Zeping Shao, Zhonghui Han, Jinhui Zhang, Yan Zhang, Shuo Wang
BACKGROUND: Heterocyclic aromatic amines (HAAs) have been considered as carcinogenic and mutagenic chemicals generated during thermal processing of protein-rich foods which can be inhibited by some flavonoids. And free radical scavenging is a major characteristic of flavonoids. RESULTS: The half maximal inhibitory concentration (IC50 ) values of nine flavonoids were determined by evaluating their capacity to inhibit 2-amino-3,8-dimethyl-imidazo[4,5-f]-quinoxaline (MeIQx) and 2-amino-3,7,8-trimethyl-imidazo[4,5-f]-quinoxaline (7,8-DiMeIQx) formation in a model system...
November 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29160833/taxon-and-site-specific-melatonin-catabolism
#5
REVIEW
Rüdiger Hardeland
Melatonin is catabolized both enzymatically and nonenzymatically. Nonenzymatic processes mediated by free radicals, singlet oxygen, other reactive intermediates such as HOCl and peroxynitrite, or pseudoenzymatic mechanisms are not species- or tissue-specific, but vary considerably in their extent. Higher rates of nonenzymatic melatonin metabolism can be expected upon UV exposure, e.g., in plants and in the human skin. Additionally, melatonin is more strongly nonenzymatically degraded at sites of inflammation...
November 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29160092/prevention-of-urethral-retraction-with-stay-sutures-purs-during-robot-assisted-radical-prostatectomy-improves-early-urinary-control-a-prospective-cohort-study
#6
Omer Burak Argun, Mustafa Bilal Tuna, Tünkut Doğanca, Can Obek, Panagiotis Mourmouris, Ilter Tufek, Sarper Erdogan, Bulent Cetinel, Ali Riza Kural
OBJECTIVE: To evaluate early continence rates with a novel modified vesico-urethral anastomosis technique based on prevention of urethral retraction using anastomosis sutures as stay sutures (PURS) during robot-assisted radical prostatectomy. MATERIAL AND METHOD: The modified anastomosis technique was used in 60 patients and data collected prospectively. This cohort was compared with another consecutive 60 patients operated with standard anastomosis technique. This new technique is based on preventing urethral retraction of the posterior urethra with 2 anastomosis sutures being used as stay sutures...
November 21, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/29159540/is-fertility-preservation-safe-for-adult-non-metastatic-gynecologic-rhabdomyosarcoma-patients-systematic-review-and-pooled-survival-analysis-of-137-patients
#7
REVIEW
Maha At Elsebaie, Zeinab Elsayed
PURPOSE: Recently, conservative approaches such as wide local excisions and neoadjuvant chemotherapy are being considered to select young adult females with gynecologic RMS who have strong desire to preserve fertility. This analysis aims to identify prognosticators affecting survival outcomes and defining potential candidacy for fertility-preservation. Another focus is to explore the role of chemotherapy in reducing the need for aggressive surgery and the role of radiotherapy in decreasing rates of local failure...
November 20, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29159355/aggregation-induced-visible-light-absorption-makes-reactant-1-2-diisocyanoarenes-act-as-photosensitizers-in-double-radical-isocyanide-insertions
#8
Wenmin Wang, Xiaoyang Sun, Jian Qu, Xiaoyu Xie, Zheng-Hang Qi, Daocheng Hong, Su Jing, Dong Zheng, Yuxi Tian, Haibo Ma, Shouyun Yu, Jing Ma
The joint computational and experimental efforts reveal that the organic molecule 1,2-diisocyano-4,5-dimethylbenzene (1) acts as both a reactant and a photosensitizer (PS) in a metal-free reaction with perfluoroalkylhalide (2) to produce 2-perfluoroalkyl quinoxalines (3) under visible light. Both the π-π stacking aggregation in crystals and the solvation in various solvents of PS 1 exhibited visible-light absorption at 466 nm in spite of its smaller coefficient than that of the ultraviolet-light absorption...
November 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29159144/thermoresponsive-graphene-oxide-starch-micro-nanohydrogel-composite-as-biocompatible-drug-delivery-system
#9
Mina Sattari, Marziyeh Fathi, Mansour Daei, Hamid Erfan-Niya, Jaleh Barar, Ali Akbar Entezami
Introduction: Stimuli-responsive hydrogels, which indicate a significant response to the environmental change (e.g., pH, temperature, light, …), have potential applications for tissue engineering, drug delivery systems, cell therapy, artificial muscles, biosensors, etc. Among the temperature-responsive materials, poly (N-isopropylacrylamide) (PNIPAAm) based hydrogels have been widely developed and their properties can be easily tailored by manipulating the properties of the hydrogel and the composite material...
2017: BioImpacts: BI
https://www.readbyqxmd.com/read/29158919/antioxidant-and-antiradical-properties-of-selected-flavonoids-and-phenolic-compounds
#10
Zübeyir Huyut, Şükrü Beydemir, İlhami Gülçin
Phenolic compounds and flavonoids are known by their antioxidant properties and one of the most important sources for humans is the diet. Due to the harmful effects of synthetic antioxidants such as BHA and BHT, natural novel antioxidants have become the focus of attention for protecting foods and beverages and reducing oxidative stress in vivo. In the current study, we investigated the total antioxidant, metal chelating, Fe(3+) and Cu(2+) reduction, and free radical scavenging activities of some phenolic and flavonoid compounds including malvin, oenin, ID-8, silychristin, callistephin, pelargonin, 3,4-dihydroxy-5-methoxybenzoic acid, 2,4,6-trihydroxybenzaldehyde, and arachidonoyl dopamine...
2017: Biochemistry Research International
https://www.readbyqxmd.com/read/29158873/contribution-and-interactions-of-hydroxycinnamic-acids-found-in-bran-and-wholegrain-sorghum-sorghum-bicolor-l-moench-effects-on-the-antioxidant-capacity-and-inhibition-of-human-erythrocyte-hemolysis
#11
Norma Julieta Salazar-López, Gustavo A González-Aguilar, Guadalupe Loarca-Piña, Francisco J Cinco-Moroyoqui, Ofelia Rouzaud-Sández, J Abraham Domínguez-Avila, Maribel Robles-Sánchez
An imbalance between free radicals and antioxidants is known as oxidative stress, and it promotes cellular aging and the development of chronic noncommunicable diseases. The bioactive compounds present in food play an important role in preventing oxidative stress. The aim of this study was to determine the contributions and interactions of the hydroxycinnamic acids found in the bran and whole grain of sorghum and to evaluate their effects on the antioxidant capacity and inhibition of the hemolysis of human erythrocytes...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29158705/melatonin-attenuates-thiocyanate-induced-vasoconstriction-in-aortic-rings
#12
Alexander M Prusa, Christian A Plass
Cigarette smoking not only has a carcinogenic effect but also leads to an increase in arterial blood pressure. Besides its main components, i.e. nicotine, tar, and carbon monoxide, cigarette smoke also contains thiocyanate. Thiocyanate anions (SCN(-)) arise from the detoxification of hydrogen cyanide and its plasma concentrations were found to correlate significantly with cigarette consumption. There is also evidence that atherosclerotic disease progression is much more rapid when serum SCN(-) levels are increased...
November 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/29158169/potential-benefit-of-lymph-node-dissection-during-radical-nephroureterectomy-for-upper-tract-urothelial-carcinoma-a-systematic-review-by-the-european-association-of-urology-guidelines-panel-on-non-muscle-invasive-bladder-cancer
#13
REVIEW
Jose Luis Dominguez-Escrig, Benoit Peyronnet, Thomas Seisen, Harman M Bruins, Cathy Yuhong Yuan, Marko Babjuk, Andreas Böhle, Maximilian Burger, Eva M Compérat, Paolo Gontero, Thomas Lam, Steven MacLennan, Hugh Mostafid, Joan Palou, Bas W G van Rhijn, Richard J Sylvester, Richard Zigeuner, Shahrokh F Shariat, Morgan Rouprêt
CONTEXT: The oncological efficacy of routine lymphadenectomy (lymph node dissection [LND]) at the time of radical nephroureterectomy (RNU) remains controversial. OBJECTIVE: To systematically review the available literature assessing the impact of LND in upper tract urothelial carcinoma (UTUC) patients. EVIDENCE ACQUISITION: Embase, Medline, and Cochrane databases were searched for all studies comparing outcomes of patients undergoing RNU without LND versus any form of LND...
November 17, 2017: European Urology Focus
https://www.readbyqxmd.com/read/29158115/trace-elements-cause-oxidative-damage-in-the-brain-of-rats-with-induced-hypotension
#14
David Calderón Guzmán, Maribel Ortiz Herrera, Norma Osnaya Brizuela, Gerardo Barragán Mejía, Hugo Juárez Olguín, Armando Valenzuela Peraza
Hypertension causes neuronal damage and apoptosis in the brain. Diazoxide is a drug used in the treatment of hypertension however, its effect on 5-hydroxyindole acetic acid (5-HIAA) and dopamine amines in adult animal models remains unclear. The purpose of this study was to determine the effect of oligoelements on 5-HIAA and dopamine in the brain of adult rats treated with diazoxide METHODS: Male Fisher rats (weight 250g) were treated as follows: Group I, NaCl 0.9% (control); group II, tracefusin® (1.5mL/rat); group III, diazoxide (20mg/rat) and group IV, tracefusin® (1...
November 3, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29157903/enzymatic-synthesis-of-quaternary-ammonium-chitosan-silk-fibroin-peptide-copolymer-and-its-characterization
#15
Lian Min, Meng Liu, Liangling Liu, Ziqie Rao, Chen Zhu, Lihong Fan
Free radicals are closely related to the occurrence and development of aging, cancer and inflammation. The aim of the present study was to improve the antioxidant effects of quaternary ammonium chitosan (QCS) by modified with silk fibroin peptide (SFP). The modification had been confirmed by FT-IR and (1)H NMR spectroscopy. Degree of substitution (DS) of QCS-SFP could be controlled by adjusting the reaction conditions. In this paper, the results of moisture absorption and retention test showed that QCS-SFP had excellent moisture absorption and retention properties...
November 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29157606/high-performance-thin-layer-chromatography-hptlc-direct-bioautography-as-a-method-of-choice-for-alpha-amylase-and-antioxidant-activity-evaluation-in-marine-algae
#16
Snezana Agatonovic-Kustrin, David W Morton
High-Performance Thin-layer chromatography (HPTLC) combined with DPPH free radical method and α-amylase bioassay was used to compare antioxidant and antidiabetic activities in ethanol and ethyl acetate extracts from 10 marine macroalgae species (3 Chlorophyta, 4 Phaeophyta and 3 Rhodophyta) from Blue Lagoon beach (Malaysia). Samples were also evaluated for their phenolic and stigmasterol content. On average, higher antioxidant activity was observed in the ethyl acetate extracts (55.1mg/100g gallic acid equivalents (GAE) compared to 35...
November 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29157166/sub-chronic-boldine-treatment-exerts-anticonvulsant-effects-in-mice
#17
Leila Moezi, Siranoush Yahosseini, Akram Jamshidzadeh, Mona Dastgheib, Fateme Pirsalami
OBJECTIVES: Boldine is an aporphine alkaloid which is best known for its antioxidant, anti-inflammatory and cytoprotective characteristics. It seems that all these activities are related to boldine ability to scavenge reactive free radicals. As indicated by several pieces of evidence, free radicals generation are involved in initiation and propagation of epilepsy. METHODS: In this study, we investigated the sub-chronic effects of boldine on intraperitoneal and intravenous pentylenetetrazole (PTZ) models and electroshock-induced seizure in mice...
November 20, 2017: Neurological Research
https://www.readbyqxmd.com/read/29157082/radioprotective-efficacy-of-ginkgo-biloba-and-angelica-archangelica-extract-against-technetium-99m-sestamibi-induced-oxidative-stress-and-lens-injury-in-rats
#18
Mahmoud H Khedr, Medhat W Shafaa, Amany Abdel-Ghaffar, Ahmed Saleh
PURPOSE: Technetium-99m is a radioactive tracer that emits gamma rays. Its half-life time is 6 hours. Similar to other ionizing radiations, the main mechanism of radiation-induced effects is initiated through the production of Reactive Oxygen Species (ROS). The present study was designed to determine the possible protective effects of Ginkgo-Biloba and Angelica-Archangelica against oxidative organ damage that was induced by (99m)Tc-sestamibi. MATERIALS AND METHODS: The experiments were performed on thirty-six Wistar-rats which were subdivided into control groups and groups exposed to (99m)Tc-sestamibi...
November 20, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29157018/progressive-dna-and-rna-damage-from-oxidation-after-aneurysmal-subarachnoid-hemorrhage-in-humans
#19
A Jorgensen, J M Staalsoe, A H Simonsen, S G Hasselbalch, P Høgh, A Weimann, Poulsen He, N V Olsen
Free radical toxicity is considered a key mechanism in the neuronal damage occurring after aneurysmal subarachnoid hemorrhage (SAH). We measured markers of DNA and RNA damage from oxidation in cerebrospinal fluid from 45 patients with SAH on day 1-14 after ictus and 45 age-matched healthy control subjects. At baseline, both markers were significantly increased in patients compared to controls (p-values < 0.001), and exhibited a progressive further increase (to > 20-fold above control levels) from day 5-14...
November 20, 2017: Free Radical Research
https://www.readbyqxmd.com/read/29156979/determination-of-lignans-phenolic-acids-and-antioxidant-capacity-in-transformed-hairy-root-culture-of-linum-usitatissimum
#20
Ahmed M M Gabr, Hoda B Mabrok, Emam A Abdel-Rahim, Mohamed K El-Bahr, Iryna Smetanska
Hairy root culture is a promising alternative method for the production of secondary metabolites. In this study, transformed root of Linum usitatissimum was established using Agrobacterium rhizogenes A4 strain from root cultures for lignans, phenolic acids and antioxidant capacity determination. Total lignin content (secoisolariciresinol diglucoside, secoisolariciresinol and matairesinol) was 55.5% higher in transformed root cultures than in the non-transformed root culture. Secoisolariciresinol was detected in higher concentration (2...
November 20, 2017: Natural Product Research
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