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https://www.readbyqxmd.com/read/29775204/effects-of-%C3%AE-tocotrienol-on-ochratoxin-a-induced-nephrotoxicity-in-rats
#1
Sara Damiano, Luigi Navas, Patrizia Lombari, Serena Montagnaro, Iris M Forte, Antonio Giordano, Salvatore Florio, Roberto Ciarcia
Ochratoxin A (OTA), is a natural contaminant of the food chain worldwide involved in the development of different type of cancers in animals and humans. Several studies suggested that oxidative damage might contribute to increase the cytotoxicity and carcinogenicity capabilities of OTA. The aim of this study was to evaluate the possible protective effect of δ-tocotrienol (Delta), a natural form of vitamin E, against OTA-induced nephrotoxicity. Male Sprague-Dawley rats were treated with OTA and/or Delta by gavage for 14 days...
May 18, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29763919/inhalation-of-hydrogen-of-different-concentrations-ameliorates-spinal-cord-injury-in-mice-by-protecting-spinal-cord-neurons-from-apoptosis-oxidative-injury-and-mitochondrial-structure-damages
#2
Xiao Chen, Jin Cui, Xiao Zhai, Jun Zhang, Zhengrong Gu, Xin Zhi, Weizong Weng, Panpan Pan, Liehu Cao, Fang Ji, Zhiwei Wang, Jiacan Su
BACKGROUND/AIMS: Hydrogen selectively neutralizes reactive oxygen species (ROS) and ameliorates various ROS-induced injuries. Spinal cord injury (SCI) is a serious injury to the central nervous system, and secondary SCI is closely related to excessive ROS generation. We hypothesized that hydrogen inhalation ameliorates SCI, and the mechanism of action may be related to the protective effects of hydrogen against oxidative stress, apoptosis, and mitochondrial damage. METHODS: Mechanically injured spinal cord neurons were incubated with different concentrations of hydrogen in vitro...
May 10, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29729330/paraoxonase-2-prevents-the-development-of-heart-failure
#3
Wei Li, David Kennedy, Zhili Shao, Xi Wang, Andre Klaassen Kamdar, Malory Weber, Kayla Mislick, Kathryn Kiefer, Rommel Morales, Brendan Agatisa-Boyle, Diana M Shih, Srinivasa T Reddy, Christine S Moravec, W H Wilson Tang
BACKGROUND: Mitochondrial oxidation is a major source of reactive oxygen species (ROS) and mitochondrial dysfunction plays a central role in development of heart failure (HF). Paraoxonase 2 deficient (PON2-def) mitochondria are impaired in function. In this study, we tested whether PON2-def aggravates HF progression. METHODS AND RESULTS: Using qPCR, immunoblotting and lactonase activity assay, we demonstrate that PON2 activity was significantly decreased in failing hearts despite increased PON2 expression...
May 2, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29724533/targeting-phosphodiesterase-5-by-vardenafil-improves-vascular-graft-function
#4
Gábor Veres, Martin Hagenhoff, Harald Schmidt, Tamás Radovits, Sivakkanan Loganathan, Yang Bai, Sevil Korkmaz-Icöz, Paige Brlecic, Alex Ali Sayour, Matthias Karck, Gábor Szabó
OBJECTIVES: Ischaemia reperfusion (IR) injury occurs during vascular graft harvesting and implantation during vascular/cardiac surgery. Elevated intracellular cyclic guanosine monophosphate (cGMP) levels contribute to an effective endothelial protection in different pathophysiological conditions. The hypothesis that the phosphodiesterase-5 inhibitor vardenafil would protect vascular grafts against IR injury by upregulating the nitric oxide-cGMP pathway in the vessel wall of the bypass graft was investigated...
May 1, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29721673/linagliptin-prevents-atrial-electrical-and-structural-remodeling-in-a-canine-model-of-atrial-fibrillation
#5
Tazuru Igarashi, Shinichi Niwano, Hiroe Niwano, Tomoharu Yoshizawa, Hironori Nakamura, Hidehira Fukaya, Tamami Fujiishi, Naruya Ishizue, Akira Satoh, Jun Kishihara, Masami Murakami, Junya Ako
Dipeptidyl peptidase 4 (DPP-4) inhibitors have recently been reported to exhibit additional cardioprotective effects; however, their effect in atrial remodeling, such as in atrial fibrillation (AF), remains unclear. In this study, the effect of linagliptin on atrial electrical and structural remodeling was evaluated in a canine AF model. Sixteen beagle dogs with 3-week atrial rapid stimulation were divided into the linagliptin group (9 mg/kg/day, n = 8) and pacing control group (n = 8). Three additional dogs without rapid pacing were assigned into non-pacing group, which was used as sham in this study...
May 2, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29699927/mtorc1-dependent-increase-in-oxidative-metabolism-in-pomc-neurons-regulates-food-intake-and-action-of-leptin
#6
Magalie Haissaguerre, Amandine Ferrière, Vincent Simon, Nicolas Saucisse, Nathalie Dupuy, Caroline André, Samantha Clark, Omar Guzman-Quevedo, Antoine Tabarin, Daniela Cota
OBJECTIVE: Nutrient availability modulates reactive oxygen species (ROS) production in the hypothalamus. In turn, ROS regulate hypothalamic neuronal activity and feeding behavior. The mechanistic target of rapamycin complex 1 (mTORC1) pathway is an important cellular integrator of the action of nutrients and hormones. Here we tested the hypothesis that modulation of mTORC1 activity, particularly in Proopiomelanocortin (POMC)-expressing neurons, mediates the cellular and behavioral effects of ROS...
April 13, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29694386/attenuation-of-choroidal-neovascularization-by-dietary-intake-of-%C3%AF-3-long-chain-polyunsaturated-fatty-acids-and-lutein-in-mice
#7
Ryoji Yanai, Shang Chen, Sho-Hei Uchi, Tomoaki Nanri, Kip M Connor, Kazuhiro Kimura
Dietary ω-3 long-chain polyunsaturated fatty acids (LCPUFAs) and lutein each protect against age-related macular degeneration (AMD). We here examined the effects of ω-3 LCPUFAs and lutein supplementation in a mouse model of AMD. Mice were assigned to four groups: (1) a control group fed an ω-3 LCPUFA-free diet, (2) a lutein group fed an ω-3 LCPUFA-free diet with oral administration of lutein, (3) an ω-3 group fed an ω-3 LCPUFA-supplemented diet, and (4) an ω-3 + lutein group fed an ω-3 LCPUFA-supplemented diet with oral administration of lutein...
2018: PloS One
https://www.readbyqxmd.com/read/29668110/phenylbutyl-isoselenocyanate-induces-reactive-oxygen-species-to-inhibit-androgen-receptor-and-to-initiate-p53-mediated-apoptosis-in-lncap-prostate-cancer-cells
#8
Wei Wu, Deepkamal Karelia, Kartick Pramanik, Shantu G Amin, Arun K Sharma, Cheng Jiang, Junxuan Lu
Previous studies have established the in vivo bioavailability and efficacious dosages of phenylbutyl isoselenocyanate (ISC-4), a selenium-substituted isothiocyanate, against mouse xenograft models of human melanoma and colorectal cancer. To explore its potential attributes against prostate cancer, we treated human LNCaP prostate cancer cells with ISC-4 and examined their apoptosis responses, and interrogated the signaling mechanisms through pharmacological and siRNA knockdown approaches. Our results show that ISC-4 was more potent at inducing apoptosis than its sulfur analog phenylbutyl isothiocyanate (PBITC) without suppressing protein kinase AKT Ser473 phosphorylation...
April 18, 2018: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/29657902/inhibitory-effects-of-angiotensin-ii-receptor-blockade-on-human-tenon-fibroblast-migration-and-reactive-oxygen-species-production-in-cell-culture
#9
Duri Kim, Ushasree Pattamatta, Elizabeth Kelly, Paul R Healey, Nicole Carnt, Hans Zoellner, Andrew J R White
Purpose: We investigate the effect of angiotensin receptor blockade on the migration of human Tenon fibroblasts (HTF), using irbesartan, an angiotensin II receptor type 1 (AT1R) blocker (ARB) as a potential antifibrotic agent in glaucoma filtration surgery. Methods: Confluent HTF cultures were scratched with a 1 mL pipette tip and treated with either irbesartan (10, 50, and 100 μg/mL) or angiotensin II (2 μg/mL). The extent of HTF migration up to 30 hours, and cell number and morphology at 72 hours was evaluated...
April 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29653389/how-does-the-microbial-load-affect-the-quality-of-equine-cool-stored-semen
#10
E Varela, J Rey, E Plaza, P Muñoz de Propios, J M Ortiz-Rodríguez, M Álvarez, L Anel-López, L Anel, P De Paz, M C Gil, J M Morrell, C Ortega-Ferrusola
Contaminating bacteria present in stallion ejaculates may compromise sperm quality during storage. Different procedures have been used to reduce the load of microorganisms in semen and avoid bacterial growth during storage. The aims of this study were: 1) to evaluate different techniques to eliminate bacteria in semen 2) to study the relationship between total microflora load (TML) and ROS production; and 3) to determine if TML affects the functionality of cool-stored sperm. Ejaculates from 11 stallions were split and processed in 3 ways: A...
March 26, 2018: Theriogenology
https://www.readbyqxmd.com/read/29621777/loading-mir-210-in-endothelial-progenitor-cells-derived-exosomes-boosts-their-beneficial-effects-on-hypoxia-reoxygeneation-injured-human-endothelial-cells-via-protecting-mitochondrial-function
#11
Xiaotang Ma, Jinju Wang, Jiao Li, Chunlian Ma, Shuzhen Chen, Wei Lei, Yi Yang, Shiming Liu, Ji Bihl, Can Chen
BACKGROUND/AIMS: Stem cell-derived exosomes (EXs) offer protective effects on various cells via their carried microRNAs (miRs). Meanwhile, miR-210 has been shown to reduce mitochondrial reactive oxygen species (ROS) overproduction. In this study, we determined the potential effects of endothelial progenitor cell-derived EXs (EPC-EXs) on hypoxia/ reoxygenation (H/R) injured endothelial cells (ECs) and investigated whether these effects could be boosted by miR-210 loading. METHODS: Human EPCs were used to generate EPC-EXs, or transfected with scrambler control or miR-210 mimics to generate EPC-EXssc and EPC-EXsmiR-210...
March 29, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29611065/ros-induced-autophagy-reduces-b16f10-melanoma-cell-proliferative-activity
#12
Gustavo Miranda Pires Santos, Susana C P S Oliveira, Juliana C S Monteiro, Sandra R Fagnani, Fernando Pires Sampaio, Neandder Andrade Correia, Pedro J L Crugeira, Antonio L B Pinheiro
Cancer is a pathology characterized by increased cell progression and/or reduced programmed cell death. Melanoma shows a rapid increase in cell progression and its resistance to chemotherapy is associated with uncontrolled apoptosis and to mechanisms that increase the flow of the drug out of the cell. The objective of this study was to evaluate the effects of photodynamic therapy (PDT) on the cell proliferation and cellular alterations in B16F10 murine melanoma. For that, four experimental groups were evaluated: the control group; laser group (ʎ = 660 ηm, 40 mW, 2...
April 2, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29592844/anti-oxidative-and-anti-apoptotic-effects-of-acupuncture-role-of-thioredoxin-1-in-the-hippocampus-of-vascular-dementia-rats
#13
Wen Zhu, Xue-Rui Wang, Si-Qi Du, Chao-Qun Yan, Na-Na Yang, Lu-Lu Lin, Guang-Xia Shi, Cun-Zhi Liu
Emerging evidence suggests that acupuncture treatment has anti-oxidative effects that effects cognitive impairment in vascular dementia (VD) rats. In the present study, we aimed to investigate whether thioredoxin-1 (Trx-1)/thioredoxin reductase-1 (TrxR-1) were involved in the beneficial effects of acupuncture. After 2-weeks of acupuncture treatment, Morris water maze (MWM), dihydroethidium (DHE) staining, Nissl staining and TdT-mediated dUTP nick end labeling (TUNEL) staining were used to assess the effects of acupuncture on cognitive function and hippocampal neuronal injury in two-vessel occlusion (2VO) model...
March 25, 2018: Neuroscience
https://www.readbyqxmd.com/read/29568962/dickkopf%C3%A2-3-upregulation-mediates-the-cardioprotective-effects-of-curcumin-on-chronic-heart-failure
#14
Quan Cao, Junxia Zhang, Ling Gao, Yijie Zhang, Mingyan Dai, Mingwei Bao
Curcumin, isolated from rhizome of turmeric, has been widely studied as a potential therapeutic drug for cancer. However, protective effects of curcumin on chronic heart failure (CHF) have not been fully studied. In the present study, the effects of curcumin on CHF and the underlying mechanisms were investigated. A total of 40 rabbits were randomized into 4 groups: Control rabbits fed with placebo (Con) or curcumin (Con‑cur), CHF rabbits fed with placebo (CHF) or curcumin (CHF‑cur). CHF was induced by volume and pressure overload...
March 20, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29566307/enhancing-amplification-of-late-outgrowth-endothelial-cells-by-bilobalide
#15
Shuqin Liu, Xiaoye Hou, Lina Chen, Hao Hu, Qiang Sun, Feng Zhao, Chuanhao Liu
Transfusion of autologous late-outgrowth endothelial cells (OECs) is a promising treatment for restenosis after revascularization. Preparing cells by in vitro amplification is a key step to implement the therapy. This study aimed to demonstrate that bilobalide, a terpenoid, enhances the OEC amplification. Human-, rabbit- and rat OECs and a mouse femoral artery injury model were used. Expanding OECs used endothelial growth medium-2 as the standard culture medium while exploring the mechanisms used endothelial basal medium-2...
March 22, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29521149/protective-properties-of-geniposide-against-uv-b-induced-photooxidative-stress-in-human-dermal-fibroblasts
#16
Daehyun Shin, Sihyeong Lee, Yu-Hua Huang, Hye-Won Lim, Yoonjin Lee, Kyounghee Jang, Yongwan Cho, Sang Jun Park, Dae-Duk Kim, Chang-Jin Lim
CONTEXT: Geniposide (genipin-1-O-β-d-glucoside) is a major bioactive ingredient in the fruits of gardenia [Gardenia jasminoides J. Ellis (Rubiaceae)], a traditional herbal medicine in Asian countries. OBJECTIVE: This work assesses the skin anti-photoaging potential of geniposide in human dermal fibroblasts under UV-B irradiation. MATERIALS AND METHODS: The anti-photoaging property of geniposide, at varying concentrations (5, 12 and 30 μM) treated for 30 min prior to UV-B irradiation, was evaluated by analysing reactive oxygen species (ROS), promatrix metalloproteinase-2 (proMMP-2), glutathione (GSH), superoxide dismutase (SOD), nuclear factor erythroid 2-related factor 2 (Nrf2) and cellular viability...
December 2018: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29500566/development-of-an-in-vitro-3d-brain-tissue-model-mimicking-in-vivo-like-pro-inflammatory-and-pro-oxidative-responses
#17
Hyung Joon Cho, Scott S Verbridge, Rafael V Davalos, Yong W Lee
To analyze complex inflammatory responses in an in vitro system, we constructed a new 3D in vitro brain tissue model that exhibits in vivo-like tissue responses (e.g. immune cell phenotypes, and molecular response) to inflammatory stimuli. Finite element modeling of oxygen diffusion and cellular oxygen consumption predicted the oxygen profile within 3D structures, consisting of Type I collagen hydrogel embedded with murine microglia. Viability and cytotoxicity analyses supported the mathematical analysis, determining optimal cell growth conditions for 3D construct development...
June 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29494287/resveratrol-regulates-blood-pressure-by-enhancing-ampk-signaling-to-downregulate-a-rac1-derived-nadph-oxidase-in-the-central-nervous-system
#18
Tung-Chen Yeh, Ching-Sen Shin, Hsin-Hung Chen, Chi-Cheng Lai, Gwo-Ching Sun, Ching-Jiunn Tseng, Pei-Wen Cheng
Resveratrol is a polyphenol with pleiotropic effects against oxidative damage that has been widely implicated in the lowering of hypertension risk. The purpose of this study was to determine whether improve NO release in the brain either through the activation of AMPK or reduced Rac1-induced ROS generation, thereby reducing BP in rats with fructose-induced hypertension. The rats were fed with 10% fructose or crestor (rosuvastatin; 1.5 mg/kg/day) and resveratrol (10 mg/kg/day) treatment for 1 week, the systolic blood pressure (SBP) of the rats were measured by tail-cuff method...
March 1, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29490624/curcumin-prevents-strokes-in-stroke-prone-spontaneously-hypertensive-rats-by-improving-vascular-endothelial-function
#19
Cong Lan, Xinjian Chen, Yuxun Zhang, Wei Wang, Wei Eric Wang, Yukai Liu, Yue Cai, Hongmei Ren, Shuo Zheng, Lin Zhou, Chunyu Zeng
BACKGROUND: Antioxidants have shown great promise in stroke prevention. Diarylheptanoids (also known as diphenylheptanoids) are a small class of plant secondary metabolites that possess antioxidant activity greater than that of α-tocopherol. Curcumin is the best known member and is mainly extracted from turmeric. This study aimed to explore whether curcumin has a preventive effect on stroke. METHODS: Stroke-prone spontaneously hypertensive rats (SHRsp) were randomly divided into control group (n = 10) and curcumin group (n = 10), and saline or curcumin (100 mg/kg/day) was administrated daily...
March 1, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29480496/measurement-of-reactive-oxygen-species-ros-and-mitochondrial-ros-in-ampk-knockout-mice-blood-vessels
#20
Qilong Wang, Ming-Hui Zou
Reactive oxygen species (ROS) are a group of unstable and highly reactive molecules or free radicals typically generated as by-products of cellular processes involving molecular oxygen. In vascular cells, the excessive ROS generation results in the initiation and progression of cardiovascular diseases (CVD). Therefore, a dynamic, robust, and accurate ROS detection method in the blood vessels is essential for pathophysiological research studies of the cardiovascular system.In this chapter, we describe a fluorescence dye-based detection method for assaying superoxide and mitochondrial superoxide in mouse aorta using dihydroethidium (DHE) and MitoSOX...
2018: Methods in Molecular Biology
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