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https://www.readbyqxmd.com/read/28454351/the-role-of-quercetin-and-vitamin-c-in-nrf2-dependent-oxidative-stress-production-in-breast-cancer-cells
#1
Zohreh Mostafavi-Pour, Fatemeh Ramezani, Fatemeh Keshavarzi, Nasser Samadi
The balance between the production and elimination of reactive oxygen species (ROS) is essential in determining whether cells survive or undergo apoptosis. Nuclear factor erythroid 2-related factor 2 (Nrf2) may act as a sensor for electrophilic stress, thus regulating the intracellular antioxidant response. The present study investigated the role of vitamin C (VC) and quercetin (Q) in the induction of Nrf2-mediated oxidative stress in cancer cells. An MTT assay was conducted to examine the anti-proliferative effects of VC and Q...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454338/ellagic-acid-and-annona-muricata-in-the-chemoprevention-of-hpv-related-pre-neoplastic-lesions-of-the-cervix
#2
Giulia Morosetti, Anna Angela Criscuolo, Flavia Santi, Carlo Federico Perno, Emilio Piccione, Marco Ciotti
Ellagic acid is a phenolic compound naturally present in nuts and berries. Several studies have demonstrated that this bioactive compound has antioxidant, chemopreventive and antiviral activity. Annona muricata is a type of fruit tree with a long history of traditional use. A number of properties have been attributed to different parts of the plant, including anticancer and antioxidant activities. In the current study, a complex based on ellagic acid, Annona Muricata and antioxidant factors (an ellagic acid complex) was administered to a group of human papilloma virus (HPV) infected women with and without cervical lesions, for 12 months...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454225/js-k-promotes-apoptosis-by-inducing-ros-production-in-human-prostate-cancer-cells
#3
Mingning Qiu, Lieqian Chen, Guobin Tan, Longzhi Ke, Sai Zhang, Hege Chen, Jianjun Liu
Reactive oxygen species (ROS) are chemical species that alter redox status, and are responsible for inducing carcinogenesis. The purpose of the present study was to assess the effects of the glutathione S transferase-activated nitric oxide donor prodrug, JS-K, on ROS accumulation and on proliferation and apoptosis in human prostate cancer cells. Cell proliferation and apoptosis, ROS accumulation and the activation of the mitochondrial signaling pathway were measured. The results demonstrated that JS-K may inhibit prostate cancer cell growth in a dose- and time-dependent manner, and induce ROS accumulation and apoptosis in a dose-dependent manner...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454093/hsp90-inhibitor-17-dmag-exerts-anticancer-effects-against-gastric-cancer-cells-principally-by-altering-oxidant-antioxidant-balance
#4
Jeong Goo Kim, Sang Chul Lee, Ok-Hee Kim, Kee-Hwan Kim, Kyo Young Song, Sang Kuon Lee, Byung Jo Choi, Wonjun Jeong, Say-June Kim
Heat shock protein 90 (HSP90) stabilizes numerous oncoproteins and, therefore, its inhibition has emerged as a promising antineoplastic strategy for diverse malignancies. In this study, we determined the therapeutic effects and mechanisms of action of a specific HSP90 inhibitor, 17-dimethylamino-ethylamino-17-demethoxygeldanamycin (17-DMAG), in gastric cancer cell lines (AGS, SNU-1, and KATO-III), patient-derived tissues, and a mouse xenograft model. 17-DMAG exerted anticancer effects against gastric cancer cells, manifested by significantly decreased proliferation rates (P < 0...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28454090/peroxiredoxin-6-overexpression-attenuates-lipopolysaccharide-induced-acute-kidney-injury
#5
Dong Hun Lee, Ju Ho Park, Sang Bae Han, Do Young Yoon, Yu Yeon Jung, Jin Tae Hong
Peroxiredoxin 6 (PRDX6) is a member of the PRDX family of antioxidant enzymes and correlated with inflammatory response. Therefore, we investigated the role of PRDX6 during lipopolysaccharide (LPS)-induced acute kidney injury. Both 3 months aged PRDX6-overexpressing transgenic mice (PRDX6 mice) and wild type (WT) mice had acute renal injury induced by intraperitoneal injection of LPS (10 mg/kg)., PRDX6 mice showed decreased mortality and renal injury following LPS challenge compared to WT mice. Furthermore, infiltration of macrophages, T-cells and neutrophils, and the number of apoptotic cells were more decreased by LPS treatment in PRDX6 mice than in WT mice...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28454046/preliminary-investigation-of-catalytic-antioxidant-anticancer-and-bactericidal-activity-of-green-synthesized-silver-and-gold-nanoparticles-using-actinidia-deliciosa
#6
Saraschandra Naraginti, Yi Li
Herein we report a rapid low cost one step green synthetic method using Actinidia deliciosa fruit extract for preparation of stable and multifunctional silver and gold nanoparticles. The synthesized nanoparticles were successfully used as green catalysts for the reduction of 4-nitrophenol (4-NP) and methylene blue (MB). The enhanced biological activity of the prepared nanoparticles was investigated based on its highly stable antioxidant, anticancer and bactericidal effects. TEM micrographs showed that the silver nanoparticles (AgNPs) formed were predominantly spherical in shape having diameters ranging from 25 to 40nm, while gold nanoparticles (AuNPs) shown particle size ranges from 7 to 20nm...
March 30, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28453992/salinomycin-overcomes-radioresistance-in-nasopharyngeal-carcinoma-cells-by-inhibiting-nrf2-level-and-promoting-ros-generation
#7
Gong Zhang, Wenjun Wang, Chunxiao Yao, Jinjin Ren, Shuping Zhang, Muyuan Han
Radiotherapy is the most important treatment for nasopharyngeal carcinoma (NPC). Radioresistant cancer cells have been shown to potentially result in residual disease that can lead to recurrence and metastasis. Salinomycin (SAL) has been identified as a promising anticancer drug during chemical screening, but it is unclear whether SAL plays a role in radioresistance. The nuclear factor erythroid-2-related factor 2 (Nrf2) is a crucial regulator of the cellular antioxidant system. There are currently numerous data indicating that Nrf2 has an important role in cancer radioresistance...
April 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28453930/the-apoe-%C3%AE%C2%B54-allele-is-associated-with-lower-selenium-levels-in-the-brain-implications-in-alzheimer-s-disease
#8
Barbara Rita Cardoso, Dominic J Hare, Monica Lind, Catriona A McLean, Irene Volitakis, Simon M Laws, Colin L Masters, Ashley I Bush, Blaine R Roberts
The antioxidant activity of selenium, which is mainly conferred by its incorporation into dedicated selenoproteins, has been suggested as a possible neuroprotective approach for mitigating neuronal loss in Alzheimer's disease, although there is inconsistent information with respect to selenium levels in the Alzheimer's disease brain. We examined the concentration and cellular compartmentalization of selenium in the temporal cortex of Alzheimer's disease and control brain tissue. We found that Alzheimer's disease was associated with decreased selenium concentration in both soluble (i...
April 28, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28453571/effect-of-shenmai-injection-on-preventing-the-development-of-nitroglycerin-induced-tolerance-in-rats
#9
Qian Zhou, Yan Sun, Wangxiao Tan, Xiao Liu, Yuchen Qian, Xianghui Ma, Ting Wang, Xiaoying Wang, Xiumei Gao
Long-term nitroglycerin (NTG) therapy causes tolerance to its effects attributing to increased oxidative stress and endothelial dysfunction. Shenmai injection (SMI), which is clinically used to treat cardiovascular diseases, consists of two herbal medicines, Ginseng Rubra and Ophiopogonjaponicas, and is reported to have antioxidant effects. The present study was designed to investigate the potential preventive effects of Shenmai injection on development of nitroglycerin-induced tolerance. The present study involves both in vivo and in vitro experiments to investigate nitroglycerin-induced tolerance...
2017: PloS One
https://www.readbyqxmd.com/read/28453493/s-adenosylmethionine-attenuates-oxidative-stress-and-neuroinflammation-induced-by-amyloid-%C3%AE-through-modulation-of-glutathione-metabolism
#10
Qian Li, Jing Cui, Chen Fang, Min Liu, Guowen Min, Liang Li
Oxidative stress and neuroinflammation are mainly involved in the pathogenic mechanisms of Alzheimer's disease (AD). Amyloid-β (Aβ), the main component of senile plaques, is a kind of strong inducer of oxidative stress. Glutathione is an endogenous antioxidant protecting cells from oxidative injury. S-adenosylmethionine (SAM) produced in the methionine cycle is the primary methyl donor and the precursor of glutathione. In this study, the Aβ intrahippocampal injection rat model and cultured SH-SY5Y cells were used to explore the neuroprotective effect of SAM...
April 28, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28453363/a-polyphenol-based-multicomponent-nutraceutical-in-dysmetabolism-and-oxidative-stress-results-from-a-pilot-study
#11
Roberto Corsi, Giovanni Mosti, Attilio Cavezzi, Simone Ugo Urso, Gayla Dimitrova, Elena Fioroni, Roberto Colucci, Valentina Quinzi
To assess short-term efficacy and safety of a multicomponent nutraceutical (MCN) on dysmetabolism and oxidative stress, a pilot prospective observational study was performed on 21 individuals (12 men and 9 women) who took, for 60 days, 2 tablets per day of an MCN based on antioxidants and metabolism regulators: hydroxytyrosol (15 mg), maqui (300 mg), amla (200 mg), monacolin K (10 mg), berberine (245 mg), astaxanthin (0.5 mg), coenzyme Q10 (100 mg), and folic acid (200 mcg). On day 0 (T0) and day 60 (T60), all participants underwent laboratory tests related to lipid profile, carbohydrate metabolism, oxidative stress, and cellular inflammation...
April 28, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28453265/yunnaneic-acid-b-a-component-of-pulmonaria-officinalis-extract-prevents-the-peroxynitrite-induced-oxidative-stress-in-vitro
#12
Justyna Krzyżanowska-Kowalczyk, Joanna Kolodziejczyk-Czepas, Mariusz Kowalczyk, Łukasz Pecio, Pawel Nowak, Anna Stochmal
Our work reveals that the aerial parts of Pulmonaria officinalis L. are a new source of yunnaneic acid B. We studied antioxidant activity, cytotoxicity of this compound (1-50 µg/ml) and its contents in various plant extracts. This is the first study confirming the presence of yunnaneic acid B in P. officinalis L., Pulmonaria obscura Dumort, and hence, in the Boraginaceae family. Determination of 1,1-diphenyl-2-picrylhydrazyl radical reduction and peroxynitrite-scavenging efficacy in non-organic experimental systems provided the EC50 values of 7...
April 28, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28448964/antioxidant-and-hepatoprotective-effect-of-swertiamarin-on-carbon-tetrachloride-induced-hepatotoxicity-via-the-nrf2-ho-1-pathway
#13
Tao Wu, Jingjing Li, Yong Li, Hongping Song
BACKGROUND/AIMS: Swertiamarin (STM), the main bioactive component in Swertia mussotii Franch (Gentianaceae), has been shown to exert hepatoprotective effects on experimental liver injury. However, the effects and exact mechanisms of STM on carbon tetrachloride (CCl4) causing hepatotoxicity are still unknown. This study investigated the potential protective effects and mechanisms of STM on CCl4-induced liver injury in rats. METHODS: Adult male Sprague-Dawley (SD) rats were exposed to CCl4 with or without STM co-administration for consecutive eight weeks...
April 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28448954/copper-complexes-containing-thiosemicarbazones-derived-from-6-nitropiperonal-antimicrobial-and-biophysical-properties
#14
Floyd A Beckford, Kelsey R Webb
A series of four thiosemicarbazones from 6-nitropiperonal along with the corresponding copper complexes were synthesized. The biophysical characteristics of the complexes were investigated by the binding to DNA and human serum albumin. The binding to DNA is moderate; the binding constants run from (0.49-7.50)×10(4)M(-1). In relation to HSA, the complexes interact strongly with binding constants on the order of 10(5)M(-1). The complexes also display antioxidant behavior as determined by the ability to scavenge diphenylpicrylhydrazyl (dpph) and nitric oxide radicals...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28448912/effects-of-low-levels-of-ultraviolet-radiation-on-antioxidant-mechanisms-of-japanese-medaka-oryzias-latipes
#15
Wilson F Ramírez-Duarte, Tomofumi Kurobe, Swee J Teh
Extreme weather events like drought are expected to increase with climate change, which will increase exposure of freshwater fish to ultraviolet (UV) radiation. Compared to fully grown adult fish, fish in early life stages are more susceptible to UV radiation due to the lack of well-developed pigmentation. Even though several studies have described affectation of fish health after exposure to UV radiation, most of the studies have used intensities that are only found on the surface of the earth crust or at shallow depths in water bodies, and little is known about impacts of weaker UV radiation, which can be found in deep water...
April 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448906/variation-in-the-toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-to-an-epibenthic-hyalella-azteca-and-endobenthic-tubifex-tubifex-invertebrate
#16
R S Prosser, A J Bartlett, D Milani, E A M Holman, H Ikert, D Schissler, J Toito, J L Parrott, P L Gillis, V K Balakrishnan
Substituted phenylamine antioxidants (SPAs) are produced in relatively high volumes and used in a range of applications (e.g., rubber, polyurethane); however, little is known about their toxicity to aquatic biota. Therefore, current study examined the effects of chronic exposure (28 d) to four sediment-associated SPAs on epibenthic (Hyalella azteca) and endobenthic (Tubifex tubifex) organisms. In addition, acute (96-h), water-only exposures were conducted with H. azteca. Mortality, growth and biomass production were assessed in juvenile H...
April 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448902/surface-modified-tio2-nanoparticles-with-ascorbic-acid-antioxidant-properties-and-efficiency-against-dna-damage-in-vitro
#17
Vladan Bajić, Biljana Spremo-Potparević, Lada Živković, Andrea Čabarkapa, Jelena Kotur-Stevuljević, Esma Isenović, Dušan Sredojević, Ivana Vukoje, Vesna Lazić, S Phillip Ahrenkiel, Jovan M Nedeljković
The antigenotoxic and antioxidative properties of surface-modified TiO2 nanoparticles (NPs) with ascorbic acid (AA) were compared with those of constituents (free AA and bare TiO2 NPs). Colloids consisting of the TiO2 NPs with anatase crystal structure were prepared by acidic hydrolysis of TiCl4. The synthesized TiO2 NPs were characterized using transmission electron microscopy and X-ray diffraction analysis. The charge transfer (CT) complex formation between surface Ti atoms and AA is indicated by immediate appearance of red color...
April 14, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28448873/osthole-attenuates-lipid-accumulation-regulates-the-expression-of-inflammatory-mediators-and-increases-antioxidants-in-fl83b-cells
#18
Wen-Chung Huang, Po-Chen Liao, Chun-Hsun Huang, Sindy Hu, Shih-Chun Huang, Shu-Ju Wu
Osthole is found in Cnidium monnieri (L.) and has anti-inflammatory and anti-oxidative properties. It also inhibits the proliferation of hepatocellular carcinoma cells. This study aimed to evaluate the osthole suppressive nonalcoholic fatty liver disease effects in oleic acid (OA)-induced hepatic steatosis and if it can modulate inflammatory responses and oxidative stress. FL83B cells were pretreated with OA (250μΜ) for 24h, and then added different concentrations of osthole (3-100μM) for 24h. Subsequently, lipolysis and transcription factors of adipogenesis and phosphorylation of AMP-activated protein kinase proteins were measured...
April 24, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28448872/curcumin-attenuates-lipopolysaccharide-d-galactosamine-induced-acute-liver-injury-by-activating-nrf2-nuclear-translocation-and-inhibiting-nf-kb-activation
#19
Yi-Lian Xie, Jin-Guo Chu, Xiao-Min Jian, Jin-Zhong Dong, Li-Ping Wang, Guo-Xiang Li, Nai-Bin Yang
Curcumin, a polyphenol in curry spice isolated from the rhizome of turmeric, has been reported to possess versatile biological properties including anti-inflammatory, anti-oxidant, antifibrotic, and anticancer activities. In this study, the hepatoprotective effect of curcumin was investigated in lipopolysaccharide (LPS)/d-galactosamine (d-GalN)-induced acute liver injury (ALI) in rats. Experimental ALI was induced with an intraperitoneal (ip) injection of sterile 0.9% sodium chloride (NaCl) solution containing 8μg LPS and 800mg/kg d-GalN...
April 24, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28448868/protective-effects-of-teucrium-polium-aqueous-extract-and-ascorbic-acid-on-hematological-and-some-biochemical-parameters-against-carbon-tetrachloride-ccl4-induced-toxicity-in-rats
#20
Fatma Rahmouni, Latifa Hamdaoui, Riadh Badraoui, Tarek Rebai
Herbal drugs play a crucial function to protect organisms from the toxic effect of some compounds. The present study was designed to evaluate the protective effects of Teucrium Polium (TP) aqueous extract and vitamin C (Vit C) against carbon tetrachloride (CCl4) which induced toxicity in rats. Male albino Wistar rats were divided into six groups: group I was used as controls, group II received CCl4 in olive oil (0.5ml/kg) by gavage, and group III received CCl4 in olive oil (0.5ml/kg) by gavage after three days of receiving TP (5g/l), orally, for seven days; Group IV received TP (5g/l) alone, orally, for seven days, Group V received CCl4 in olive oil (0...
April 24, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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