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https://www.readbyqxmd.com/read/28527632/cerium-oxide-nanoparticles-could-ameliorate-behavioral-and-neurochemical-impairments-in-6-hydroxydopamine-induced-parkinson-s-disease-in-rats
#1
Maha A Hegazy, Hala M Maklad, Doaa M Samy, Doaa A Abdelmonsif, Bassma M El Sabaa, Fatma Y Elnozahy
BACKGROUND: Cerium oxide nanoparticles (CeO2NPs) showed promising effects in neurodegenerative diseases including some animal models of Parkinsonism. However, the implication of CeO2NPs in 6-hydroxydopamine (6-OHDA) induced Parkinsonism remains to be investigated. AIM: This study was designed to assess whether CeO2NPs treatment could alleviate neurobehavioral and neurobiochemical deficits in 6-OHDA induced neurotoxicity in rats. MATERIAL AND METHODS: 50 rats received left intrastriatal (IS) injection of either saline (control, n = 10) or 6-OHDA (n = 40)...
May 17, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28527049/early-rise-in-postoperative-creatinine-for-identification-of-acute-kidney-injury-after-cardiac-surgery
#2
Keyvan Karkouti, Vivek Rao, Christopher T Chan, Duminda N Wijeysundera
PURPOSE: Acute kidney injury (AKI) is a potentially serious complication of cardiac surgery. Treatment strategies are unlikely to prove efficacious unless patients are identified and treated soon after the onset of injury. In this observational study, we determined and validated the ability of an early rise in postoperative serum creatinine to identify patients who suffer AKI during cardiac surgery. METHODS: The relationship between an early rise in creatinine (immediate postoperative / preoperative creatinine) and AKI (> 50% increase in creatinine by postoperative calendar days 1or 2) was determined by logistic regression modelling...
May 19, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28526353/stretch-activated-two-pore-domain-k2p-potassium-channels-in-the-heart-focus-on-atrial-fibrillation-and-heart-failure
#3
REVIEW
Constanze Schmidt, Felix Wiedmann, Stefan M Kallenberger, Antonius Ratte, Jan S Schulte, Beatrix Scholz, Frank Ulrich Müller, Niels Voigt, Maria-Patapia Zafeiriou, Joachim R Ehrlich, Ursula Tochtermann, Gábor Veres, Arjang Ruhparwar, Matthias Karck, Hugo A Katus, Dierk Thomas
Two-pore-domain potassium (K2P) channels modulate cellular excitability. The significance of stretch-activated cardiac K2P channels (K2P2.1, TREK-1, KCNK2; K2P4.1, TRAAK, KCNK4; K2P10.1, TREK-2, KCNK10) in heart disease has not been elucidated in detail. The aim of this work was to assess expression and remodeling of mechanosensitive K2P channels in atrial fibrillation (AF) and heart failure (HF) patients in comparison to murine models. Cardiac K2P channel levels were quantified in atrial (A) and ventricular (V) tissue obtained from patients undergoing open heart surgery...
May 16, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28525900/preoperative-transcatheter-arterial-chemotherapy-may-suppress-oxidative-stress-in-hepatocellular-carcinoma-cells-and-reduce-the-risk-of-short-term-relapse
#4
Hao Su, Guangzhi Zhu, Ketut Indra Djaja P, Yi Lin, Yizhen Gong, Xiaoguang Liu, Jiaquan Li, Zhiming Liu, Xiao Qin, Lequn Li, Tangwei Liu, Zili Lu, Minyi Wei, Lunan Yan, Cheryl Ann Winkler, Stephen J O'Brien, Jing Li, Kaiyin Xiao, Tao Peng
In this study, we aim to investigate oxidative stress in hepatocellular carcinoma (HCC) tissues in patients receiving preoperative transcatheter arterial chemotherapy (TAC) and its association with prognosis. A total of 89 HCC patients enrolled in this study, 39 received preoperative TAC 1 week before surgery (pTAC group) and 50 did not (non-pTAC group). All patients underwent hepatectomy and postoperative TAC and were followed up to 400 weeks. Samples of liver tissue without HCC and hepatitis (n = 15) served as normal controls...
May 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28524655/tunable-control-of-an-escherichia-coli-expression-system-for-the-overproduction-of-membrane-proteins-by-titrated-expression-of-a-mutant-lac-repressor
#5
Seong Keun Kim, Dae-Hee Lee, Oh Cheol Kim, Jihyun F Kim, Sung Ho Yoon
Most inducible expression systems suffer from growth defects, leaky basal induction, and inhomogeneous expression levels within a host cell population. These difficulties are most prominent with the overproduction of membrane proteins that are toxic to host cells. Here, we developed an Escherichia coli inducible expression system for membrane protein production based on titrated expression of a mutant lac repressor (mLacI). Performance of the mLacI inducible system was evaluated in conjunction with commonly used lac operator-based expression vectors using a T7 or tac promoter...
May 19, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28523283/variable-temporal-sampling-and-tube-current-modulation-for-myocardial-blood-flow-estimation-from-dose-reduced-dynamic-computed-tomography
#6
Dimple Modgil, Michael D Bindschadler, Adam M Alessio, Patrick J La Rivière
Quantification of myocardial blood flow (MBF) can aid in the diagnosis and treatment of coronary artery disease. However, there are no widely accepted clinical methods for estimating MBF. Dynamic cardiac perfusion computed tomography (CT) holds the promise of providing a quick and easy method to measure MBF quantitatively. However, the need for repeated scans can potentially result in a high patient radiation dose, limiting the clinical acceptance of this approach. In our previous work, we explored techniques to reduce the patient dose by either uniformly reducing the tube current or by uniformly reducing the number of temporal frames in the dynamic CT sequence...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28511172/donor-specific-anti-human-leukocyte-antigens-antibodies-acute-rejection-renal-function-and-histology-in-kidney-transplant-recipients-receiving-tacrolimus-and-everolimus
#7
Alexandra Ferreira, Claudia Felipe, Marina Cristelli, Laila Viana, Geovana Basso, Suelen Stopa, Juliana Mansur, Mayara Ivani, Adrieli Bessa, Priscila Ruppel, Wilson Aguiar, Erika Campos, Maria Gerbase-DeLima, Henrique Proença, Helio Tedesco-Silva, José Medina-Pestana
BACKGROUND: This analysis compared efficacy, renal function, and histology in kidney transplant recipients receiving tacrolimus (TAC) combined with everolimus (EVR) or mycophenolate (MPS). METHODS: This was a retrospective analysis from a randomized trial in kidney transplant recipients who received a single 3 mg/kg dose of rabbit antithymocyte globulin (r-ATG), TAC, EVR, and prednisone (PRED; r-ATG/EVR, n = 85), basiliximab (BAS), TAC, EVR, and PRED (BAS/EVR, n = 102) or BAS, TAC, MPS, and PRED (BAS/MPS, n = 101)...
May 17, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28508271/optimization-of-temporal-sampling-for-82-rubidium-pet-myocardial-blood-flow-quantification
#8
Benjamin C Lee, Jonathan B Moody, Richard L Weinberg, James R Corbett, Edward P Ficaro, Venkatesh L Murthy
BACKGROUND: Suboptimal temporal sampling of left ventricular (LV) blood pool and tissue time-activity curves (TACs) may introduce bias and increased variability in estimates of myocardial blood flow (MBF) and flow reserve (MFR) from dynamic PET myocardial perfusion images. We aimed to optimize temporal sampling for estimation of MBF and MFR. METHODS: Twenty-four normal volunteers and 32 patients underwent dynamic stress/rest rubidium-82 chloride ((82)Rb) PET imaging...
May 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28507582/decreased-activity-of-butyrylcholinesterase-in-blood-plasma-of-patients-with-chronic-obstructive-pulmonary-disease
#9
Paulina Sicinska, Bozena Bukowska, Aneta Pajak, Aneta Koceva-Chyla, Tadeusz Pietras, Piotr Nizinkowski, Paweł Gorski, Maria Koter-Michalak
INTRODUCTION: Butyrylcholinesterase (BChE) is involved in the metabolism of endogenous lipids and xenobiotics, such as esters of carboxylic or phosphoric acids. Butyrylcholinesterase activity is associated with both inflammation and oxidative stress. Changes in the activity of this enzyme have been observed in various diseases such as liver cirrhosis, diabetes, neurodegenerative disease and others. MATERIAL AND METHODS: The study involved 30 patients with chronic obstructive pulmonary disease (COPD) and 18 healthy subjects...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28506572/inflammatory-cytokines-and-oxidative-stress-biomarkers-in-irritable-bowel-syndrome-association-with-digestive-symptoms-and-quality-of-life
#10
Razieh Choghakhori, Amir Abbasnezhad, Amin Hasanvand, Reza Amani
A growing body of evidence suggests a possible role for low-grade inflammation in the pathogenesis of irritable bowel syndrome (IBS). The objectives of this study were to measure serum levels of tumor necrosis factor (TNF)-α, interleukin (IL)-17, interleukin (IL)-10, malondialdehyde (MDA) and total antioxidant capacity (TAC) in IBS patients and healthy controls (HCs), and to evaluate possible correlations of such markers with gastrointestinal (GI) symptoms and quality of life (QoL). Ninety Rome III positive IBS patients and 90 sex and age matched HCs were recruited...
May 12, 2017: Cytokine
https://www.readbyqxmd.com/read/28505111/effects-of-mead-wort-heat-treatment-on-the-mead-fermentation-process-and-antioxidant-activity
#11
Sławomir Czabaj, Joanna Kawa-Rygielska, Alicja Z Kucharska, Jarosław Kliks
The effects of mead wort heat treatment on the mead fermentation process and antioxidant activity were tested. The experiment was conducted with the use of two different honeys (multiflorous and honeydew) collected from the Lower Silesia region (Poland). Heat treatment was performed with the use of a traditional technique (gently boiling), the more commonly used pasteurization, and without heat treatment (control). During the experiment fermentation dynamics were monitored using high performance liquid chromatography with refractive index detection (HPLC-RID)...
May 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28503980/assessment-of-oxidative-stress-induced-by-gold-nanorods-following-intra-tracheal-instillation-in-rats
#12
Harikiran Lingabathula, Narsimhareddy Yellu
Gold nanorods (GNRs) are used for their wide variety of applications in various industries. There is a little availability of data related to toxicity and ecological implications of these GNRs. The study evaluated the oxidative stress induction following intra-tracheal instillation of 1 and 5 mg/kg b.w. doses of 10 and 25 nm GNRs by estimating various oxidative stress markers including lipid peroxidation (malondialdehyde; MDA), glutathione (GSH), superoxide dismutase (SOD), catalase and total antioxidant capacity (TAC) after 1 day, 1 week, 1 month, and 3 months post exposure periods...
May 15, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28503736/hydrogen-sulfide-pretreatment-improves-mitochondrial-function-in-myocardial-hypertrophy-via-a-sirt3-dependent-manner
#13
Guoliang Meng, Jieqiong Liu, Shangmin Liu, Qiuyi Song, Lulu Liu, Liping Xie, Yi Han, Yong Ji
BACKGROUND AND PURPOSE Hydrogen sulfide (H2 S) is a gaseous signal molecule with anti-oxidative ability. Sirtuin 3 (SIRT3) is closely associated with mitochondrial function and oxidative stress. The study was to investigate whether and how H2 S improved myocardial hypertrophy via a SIRT3-dependent manner. EXPERIMENTAL APPROACH Neonatal rat cardiomyocytes were pre-treated with NaHS (50 μM) for 4 h followed by angiotensin II (Ang II, 100 nM) for 24 h. SIRT3 was silenced with siRNA technology. SIRT 3 promoter activity and expression, cell surface, hypertrophic gene mRNA expression, mitochondrial oxygen consumption rate and membrane potential were measured...
May 15, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28503504/antioxidant-status-and-risk-of-gestational-diabetes-mellitus-a-case-control-study
#14
Vida Mohammad Parast, Zamzam Paknahad
Gestational diabetes mellitus (GDM) is described as glucose intolerance diagnosed during pregnancy. Increased oxidative stress has implicated in diabetic problems. The aim of the current study was to compare antioxidant capacity and antioxidant nutrient intake between women with GDM (n = 40) and healthy pregnant women (n = 40). Demographic and obstetrics data were completed using interview technique and dietary intakes by using a semi-quantitative food frequency questionnaire (FFQ) with 168 items. The total antioxidant capacity (TAC) of serum was assessed by double-antibody sandwich enzyme-linked immune-sorbent assay (ELISA) method...
April 2017: Clinical Nutrition Research
https://www.readbyqxmd.com/read/28501158/poly-vinyl-alcohol-capped-silver-nanoparticles-for-antioxidant-assay-based-on-seed-mediated-nanoparticle-growth
#15
Saowapak Teerasong, Amornrassamee Jinnarak, Sumonmarn Chaneam, Prapin Wilairat, Duangjai Nacapricha
A simple and rapid method for measurement of total antioxidant capacity (TAC) was developed. In this work, gallic acid was used as the antioxidant standard. Poly(vinyl alcohol) embedded silver nanoparticles (PVA-AgNPs) were employed as a colorimetric sensor. The detection principle was based on the seed-mediated nanoparticle growth technique. The PVA-AgNPs act as a catalyst in the reduction of Ag(+) by gallic acid by providing nucleation seeds. Ag(+) was reduced to Ag° and accumulated on the PVA-AgNP surface, leading to an increase in the size of particles...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28499963/neither-artificial-light-at-night-anthropogenic-noise-nor-distance-from-roads-are-associated-with-oxidative-status-of-nestlings-in-an-urban-population-of-songbirds
#16
Giulia Casasole, Thomas Raap, David Costantini, Hamada AbdElgawad, Han Asard, Rianne Pinxten, Marcel Eens
Increasing urbanization is responsible for road-related pollutants and causes an unprecedented increase in light and noise pollution, with potential detrimental effects for individual animals, communities and ecosystems. These stressors rarely act in isolation but studies dissecting the effects of these multiple stressors are lacking. Moreover, studies on urban stressors have mainly focused on adults, while exposure in early-life may be detrimental but is largely ignored. To fill this important knowledge gap, we studied if artificial light at night, anthropogenic noise and road-related pollution (using distance from roads as a proxy) explain variation in oxidative status in great tit nestlings (Parus major) in an urban population...
May 10, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28499379/diet-with-a-combination-of-high-protein-and-high-total-antioxidant-capacity-is-strongly-associated-with-low-prevalence-of-frailty-among-old-japanese-women-a-multicenter-cross-sectional-study
#17
Satomi Kobayashi, Hitomi Suga, Satoshi Sasaki
BACKGROUND: The intake of protein and antioxidants has been inversely associated with frailty, individually. However, to our knowledge, no study has evaluated these associations in considering antioxidants or protein intakes as respective confounders. Further, the cooperative effect of dietary protein and antioxidants on frailty has not been investigated. Therefore, we examined the association of high protein and high dietary total antioxidant capacity (TAC) with frailty under the adjustment for dietary TAC or protein intake, respectively...
May 12, 2017: Nutrition Journal
https://www.readbyqxmd.com/read/28495475/ameliorative-effects-of-achillea-millefolium-inflorescences-alcoholic-extract-against-nicotine-induced-reproductive-failure-in-rat
#18
M Hallaj Salahipour, Sh Hasanzadeh, H Malekinejad
BACKGROUND: Nicotine (Nic) is a major risk factor in the development of functional disorders of male reproductive system. Achillea millefolium; is highly regarded for medicinal activities, due to its antioxidant and anti-inflammatory properties. This study was carried out to evaluate whether Achillea millefolium (Achm) inflorescences alcoholic extract could serve as a protective agent in male reproductive male failures during Nic exposure in a rat model. METHODS: Twenty-five adult male Wistar rats were categorized into the five groups...
May 8, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/28494853/in-vitro-antioxidant-assessment-and-a-rapid-hptlc-bioautographic-method-for-the-detection-of-anticholinesterase-inhibitory-activity-of-geophila-repens
#19
Umesh Chandra Dash, Atish Kumar Sahoo
OBJECTIVE: Geophila repens (L.) I. M. Johnst. (Rubiaceae), a small, creeping, perennial herb, is claimed to have memory-enhancing property. The goal of this study was to assess its antioxidant and anticholinesterase activity and conduct a rapid bioautographic enzyme assay for screening acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibition of G. repens extracts. METHODS: Antioxidant activity of G. repens extracts was assessed by performing 1,1-diphenyl-2-picrylhydrazyl (DPPH), nitric oxide (NO), superoxide (SOD), hydroxyl (OH) and total antioxidant capacity (TAC) assays...
May 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28494450/stachydrine-protects-against-pressure-overload-induced-cardiac-hypertrophy-by-suppressing-autophagy
#20
Tong-Tong Cao, Hui-Hua Chen, Zhiwei Dong, Yan-Wu Xu, Pei Zhao, Wei Guo, Hong-Chang Wei, Chen Zhang, Rong Lu
BACKGROUND: Autophagy is required for the maintenance of cardiomyocyte homeostasis. However, excessive autophagy plays a maladaptive role in pressure overload-induced heart failure. To identify mechanisms by which Stachydrine inhibits pressure overload-induced cardiac hypertrophy, we determined inhibitory activities against activation of NADPH oxidase, reactive oxygen species(ROS) production and excessive activation of autophagy. METHODS: Stachydrine was administered intragastrically to Wistar rats after Transverse aortic constriction(TAC) and H9c2 cells were treated with Stachydrine after Angiotension II stimulation...
May 11, 2017: Cellular Physiology and Biochemistry
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