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https://www.readbyqxmd.com/read/28435434/study-of-the-cytotoxic-effects-of-2-5-diaziridinyl-3-6-dimethyl-1-4-benzoquinone-medzq-in-mouse-hepatoma-cells
#1
Rasa Jarasiene-Burinskaja, Milda Alksne, Violeta Bartuskiene, Violeta Voisniene, Jaroslav Burinskij, Narimantas Cenas, Virginija Bukelskiene
A number of quinones have been shown to be efficient anticancer agents. However, some mechanisms of their action, in particular cell signaling are not well understood. The aim of this study was to partly fill this gap by characterizing the mode of cytotoxicity of 2,5-diaziridinyl-3,6-dimethyl-1,4-benzoquinone (MeDZQ) in malignant mouse hepatoma cells (MH-22A) with regard to the expression and activation of main molecules in MAPK cell signaling pathway. The study revealed unequal roles of MAP kinases in MeDZQ-induced cell death: the compound did not induce significant changes in ERK expression or its phosphorylation; JNK appeared to be responsible for cell survival, however, p38 kinase was shown to be involved in cell death...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28432555/rotundarpene-inhibits-tnf-%C3%AE-induced-activation-of-the-akt-mtor-and-nf-%C3%AE%C2%BAb-pathways-and-the-jnk-and-p38-associated-with-production-of-reactive-oxygen-species
#2
Arum Kim, Yoon Jeong Nam, Yong Kyoo Shin, Min Sung Lee, Dong Suep Sohn, Chung Soo Lee
Ilex Rotunda Thunb has been shown to have anti-inflammatory and antioxidant effects. In human keratinocytes, we investigated the effect of rotundarpene (4-caffeoyl-3-methyl-but-2-ene-1,4-diol) on the TNF-α-stimulated production of inflammatory mediators in relation to the Akt, mTOR, and NF-κB pathways, and the JNK and p38-MAPK. Rotundarpene, Akt inhibitor, Bay 11-7085, rapamycin, and N-acetylcysteine inhibited the TNF-α-stimulated production of cytokines and chemokines, increase in the levels of p-Akt and mTOR, activation of NF-κB, and production of reactive oxygen species in keratinocytes...
April 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28432072/translocase-of-inner-membrane-50-functions-as-a-novel-protective-regulator-of-pathological-cardiac-hypertrophy
#3
Kai Tang, Yifan Zhao, Hailing Li, Mengyun Zhu, Weiming Li, Weijing Liu, Guofu Zhu, Dachun Xu, Wenhui Peng, Ya-Wei Xu
BACKGROUND: Translocase of inner membrane 50 (TIM50) is a member of the translocase of inner membrane (TIM) complex in the mitochondria. Previous research has demonstrated the role of TIM50 in the regulation of oxidative stress and cardiac morphology. However, the role of TIM50 in pathological cardiac hypertrophy remains unknown. METHODS AND RESULTS: In the present study we found that the expression of TIM50 was downregulated in hypertrophic hearts. Using genetic loss-of-function animal models, we demonstrated that TIM50 deficiency increased heart and cardiomyocyte size with more severe cardiac fibrosis compared with wild-type littermates...
April 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28430612/diosmetin-exerts-anti-oxidative-anti-inflammatory-and-anti-apoptotic-effects-to-protect-against-endotoxin-induced-acute-hepatic-failure-in-mice
#4
You Yang, Xiao-Bao Gong, Li-Gua Huang, Zhen-Xu Wang, Rong-Zhen Wan, Peng Zhang, Qing-Yan Zhang, Zhu Chen, Bao-Shun Zhang
To investigate the effects and mechanism of diosmetin on acute hepatic failure (AHF), an AHF murine model was established through administration of lipopolysaccharides/D-galactosamine (LPS/D-GalN). In vitro, diosmetin scavenged free radicals. In vivo, diosmetin decreased mortality among mice, blocked the development of histopathological changes and hepatic damage, and suppressed levels of inflammatory mediators and cytokines. In addition, diosmetin prevented the expression of phosphorylated IKK, IκBα, and NF-κB p65 in the NF-κB signaling pathway, and JNK and p38 in the MAPK signaling pathway...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423510/genistein-inhibits-the-growth-and-regulates-the-migration-and-invasion-abilities-of-melanoma-cells-via-the-fak-paxillin-and-mapk-pathways
#5
Shuna Cui, Juan Wang, Qingqing Wu, Jing Qian, Changshui Yang, Ping Bo
Genistein is one of the main components of soy-based foods, which are widely known for their many benefits, including anti-cancer, anti-inflammatory, and antioxidant effects. In this study, we investigated the anti-metastasis effects of genistein on B16F10 melanoma cells. Our results showed that genistein strongly inhibited B16F10 cell proliferation and induced apoptosis in time- and concentration-dependent manners. Genistein altered the morphology of B16F10 cells to an elongated shape with slim pseudopodia-like protrusions...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420170/fisetin-protects-pc12-cells-from-tunicamycin-mediated-cell-death-via-reactive-oxygen-species-scavenging-and-modulation-of-nrf2-driven-gene-expression-sirt1-and-mapk-signaling-in-pc12-cells
#6
Jui-Hung Yen, Pei-Shan Wu, Shu-Fen Chen, Ming-Jiuan Wu
BACKGROUND: Fisetin (3,7,3',4'-tetrahydroxyflavone) is a dietary flavonol and exhibits antioxidant, anti-inflammatory, and neuroprotective activities. However, high concentration of fisetin is reported to produce reactive oxygen species (ROS), induce endoplasmic reticulum (ER) stress and cause cytotoxicity in cancer cells. The aim of this study is to investigate the cytoprotective effects of low concentration of fisetin against tunicamycin (Tm)-mediated cytotoxicity in neuronal-like catecholaminergic PC12 cells...
April 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28409295/metal-chelator-tpen-selectively-induces-apoptosis-in-k562-cells-through-reactive-oxygen-species-signaling-mechanism-implications-for-chronic-myeloid-leukemia
#7
Luisa Rojas-Valencia, Carlos Velez-Pardo, Marlene Jimenez-Del-Rio
Chronic myeloid leukemia (CML) is a hematologic disorder characterized by the constitutive expression of BCR-ABL tyrosine kinase. Although successful implementation of tyrosine kinase inhibitors for the treatment of CML remain a traditional choice for molecularly targeted therapy, some patients present primary or secondary resistance to such therapy. Therefore, alternative therapeutic strategies are required to treat resistant CML cells. Accordingly, new anti-proliferative and/or pro-apoptotic compounds would be needed for clinical treatment...
April 13, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28408888/prevention-of-bleomycin-induced-pulmonary-inflammation-and-fibrosis-in-mice-by-paeonol
#8
Meng-Han Liu, An-Hsuan Lin, Hsin-Kuo Ko, Diahn-Warng Perng, Tzong-Shyuan Lee, Yu Ru Kou
Pulmonary fibrosis is a severe and progressive disease that is characterized by an abnormal deposition of extracellular matrix, such as collagens. The pathogenesis of this disease may be initiated by oxidative damage of lung epithelial cells by fibrogenic stimuli, leading to lung inflammation, which in turn promotes various lung fibrotic responses. The profibrogenic effect of transforming growth factor-β1 (TGF-β1) on lung fibroblasts is crucial for the pathogenesis of this disease. Paeonol, the main phenolic compound present in the Chinese herb Paeonia suffruticosa, has antioxidant and anti-inflammatory properties...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28393248/epigallocatechin-3-gallate-ameliorates-insulin-resistance-in-hepatocytes
#9
Shan-Bo Ma, Rui Zhang, Shan Miao, Bin Gao, Yang Lu, Sen Hui, Long Li, Xiao-Peng Shi, Ai-Dong Wen
Hyperglycemia is a typical pathogenic factor in a series of complications among patients with type II diabetes. Epigallocatechin-3-gallate (EGCG) is the major polyphenol extracted from green tea and is reported to be an antioxidant. The aim of the present study was to examine the effect of EGCG on insulin resistance in human HepG2 cells pretreated with high concentrations of glucose. The protein kinase B (AKT)/glycogen synthase kinase (GSK) pathways were analyzed using western blot analysis in HepG2 cells and primary mouse hepatocytes treated with high glucose and/or EGCG...
April 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28391263/salvianolic-acid-a-protects-h9c2-cells-from-arsenic-trioxide-induced-injury-via-inhibition-of-the-mapk-signaling-pathway
#10
Jing-Yi Zhang, Gui-Bo Sun, Yun Luo, Min Wang, Wei Wang, Yu-Yang Du, Ying-Li Yu, Xiao-Bo Sun
BACKGROUND/AIMS: This study aimed to investigate whether Salvianolic acid A (Sal A) conferred cardiac protection against Arsenic trioxide (ATO)-induced cardiotoxicity in H9c2 cells by inhibiting MAPK pathways activation. METHODS: H9c2 cardiac cells were exposed to 10 µM ATO for 24 h to induce cytotoxicity. The cells were pretreated with Sal A for 4 h before exposure to ATO. Cell viability was determined utilizing the MTT assay. The percentage of apoptosis was measured by a FITC-Annexin V/PI apoptosis kit for flow cytometry...
April 7, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28386381/anti-inflammatory-effect-of-lycopene-in-sw480-human-colorectal-cancer-cells
#11
Jae Hoon Cha, Woo Kyoung Kim, Ae Wha Ha, Myung Hwan Kim, Moon Jeong Chang
BACKGROUND/OBJECTIVES: Although the antioxidative effects of lycopene are generally known, the molecular mechanisms underlying the anti-inflammatory properties of lycopene are not fully elucidated. This study aimed to examine the role and mechanism of lycopene as an inhibitor of inflammation. METHODS/MATERIALS: Lipopolysaccharide (LPS)-stimulated SW 480 human colorectal cancer cells were treated with 0, 10, 20, and 30 µM lycopene. The MTT assay was performed to determine the effects of lycopene on cell proliferation...
April 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28374919/all-trans-retinoic-acid-ameliorates-arsenic-induced-oxidative-stress-and-apoptosis-in-the-rat-uterus-by-modulating-mapk-signaling-proteins
#12
Aniruddha Chatterjee, Urmi Chatterji
Exposure to arsenic leads to inhibition of the antioxidant defense mechanism of the body. Reactive oxygen species generated in response to arsenic causes reproductive failures in exposed females and also acts as an inducer of apoptosis. As a prospective remedial agent, all-trans retinoic acid (ATRA) was assessed for reversing arsenic-induced oxidative stress and apoptosis. Rats exposed to arsenic for 28 days were allowed to recover naturally or were treated simultaneously with ATRA for 28 days or up to 56 days...
April 4, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28369910/acute-ethanol-exposure-induced-autophagy-mediated-cardiac-injury-via-activation-of-the-ros-jnk-bcl-2-pathway
#13
Zhongxin Zhu, Yewei Huang, Lingchun Lv, Youli Tao, Minglong Shao, Congcong Zhao, Mei Xue, Jia Sun, Chao Niu, Yang Wang, Sunam Kim, Weitao Cong, Wei Mao, Litai Jin
Binge drinking is associated with increased cardiac autophagy, and often triggers heart injury. Given the essential role of autophagy in various cardiac diseases, this study was designed to investigate the role of autophagy in ethanol-induced cardiac injury and the underlying mechanism. Our study showed that ethanol exposure enhanced the levels of LC3-II and LC3-II positive puncta and promoted cardiomyocyte apoptosis in vivo and in vitro. In addition, we found that ethanol induced autophagy and cardiac injury largely via the sequential triggering of reactive oxygen species (ROS) accumulation, activation of c-Jun NH2-terminal kinase (JNK), phosphorylation of Bcl-2, and dissociation of the Beclin 1/Bcl-2 complex...
March 28, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28369600/involvement-of-reactive-oxygen-species-in-ionizing-radiation-induced-upregulation-of-cell-surface-toll-like-receptor-2-and-4-expression-in-human-monocytic-cells
#14
Hironori Yoshino, Ikuo Kashiwakura
Toll-like receptors (TLRs) are pattern recognition receptors that recognize pathogen-associated molecular patterns and are indispensable for antibacterial and antiviral immunity. Our previous report showed that ionizing radiation increases the cell surface expressions of TLR2 and TLR4 and enhances their responses to agonists in human monocytic THP1 cells. The present study investigated how ionizing radiation increases the cell surface expressions of TLR2 and TLR4 in THP1 cells. The THP1 cells treated or not treated with pharmaceutical agents such as cycloheximide and N-acetyl-L-cysteine (NAC) were exposed to X-ray irradiation, following which the expressions of TLRs and mitogen-activated protein kinase were analyzed...
March 22, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28351775/nox2-nox4-and-mitochondrial-derived-reactive-oxygen-species-contribute-to-angiopoietin-1-signaling-and-angiogenic-responses-in-endothelial-cells
#15
Sharon Harel, Dominique Mayaki, Veronica Sanchez, Sabah N A Hussain
Angiopoietin-1 (Ang-1) is a ligand of Tie-2 receptors that promotes survival, migration, and differentiation of endothelial cells. Several studies have linked reactive oxygen species (ROS) to Ang-1 signaling and distinct angiogenic responses, but the molecular sources of these ROS have never been clearly identified. In this study, we have identified source-specific contributions of ROS to Ang-1/Tie 2 signaling and angiogenic responses in human umbilical vein endothelial cells (HUVECs), specifically the differential contributions of mitochondrial ROS (mtROS) and ROS from two isoforms of NADPH oxidase (NOX2, NOX4)...
March 25, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28348463/human-%C3%AE-defensin-3-reduces-tnf-%C3%AE-induced-inflammation-and-monocyte-adhesion-in-human-umbilical-vein-endothelial-cells
#16
Tianying Bian, Houxuan Li, Qian Zhou, Can Ni, Yangheng Zhang, Fuhua Yan
The aim of this study was to investigate the role of human β-defensin 3 (hBD3) in the initiation stage of atherosclerosis with human umbilical vein endothelial cells (HUVECs) triggered by tumor necrosis factor- (TNF-) α. The effects of hBD3 on TNF-α-induced endothelial injury and inflammatory response were evaluated. Our data revealed that first, hBD3 reduced the production of interleukin-6 (IL-6), IL-8, monocyte chemoattractant protein-1 (MCP-1), and macrophage migration inhibitory factor (MIF) in HUVECs in a dose-dependent manner...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28323129/peroxiredoxin-2-regulates-pgf2%C3%AE-induced-corpus-luteum-regression-in-mice-by-inhibiting-ros-dependent-jnk-activation
#17
Sun-Ji Park, Jung-Hak Kim, Tae-Shin Kim, Sang-Rae Lee, Jeen-Woo Park, Seunghoon Lee, Jin-Man Kim, Dong-Seok Lee
Luteal regression is a natural and necessary event to regulate the reproductive process in all mammals. Prostaglandin F2α (PGF2α) is the main factor that causes functional and structural regression of the corpus luteum (CL). It is well known that PGF2α-mediated ROS generation is closely involved in luteal regression. Peroxiredoxin 2 (Prx2) as an antioxidant enzyme plays a protective role against oxidative stress-induced cell death. However, the effect of Prx2 on PGF2α-induced luteal regression has not been reported...
March 18, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28314104/ginsenoside-re-ameliorates-brain-insulin-resistance-and-cognitive-dysfunction-in-high-fat-diet-induced-c57bl-6-mice
#18
Jong Min Kim, Chang Hyeon Park, Seon Kyeong Park, Tae Wan Seung, Jin Yong Kang, Jeong Su Ha, Du Sang Lee, Uk Lee, Dae-Ok Kim, Ho Jin Heo
The ameliorating effects of ginsenoside Re (G Re) on high fat diet (HFD)-induced insulin resistance in C57BL/6 mice were investigated to assess its physiological function. In the results of behavioral tests, G Re improved cognitive dysfunction in diabetic mice using Y-maze, passive avoidance, and Morris water maze tests. G Re also significantly recovered hyperglycemia and fasting blood glucose level. In the results of serum analysis, G Re decreased triglyceride (TG), total cholesterol (TCHO), low-density lipoprotein cholesterol (LDLC), glutamic-oxaloacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT) and increased the ratio of high-density lipoprotein cholesterol (HDLC)...
March 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28271615/neurotropin%C3%A2-alleviates-hippocampal-neuron-damage-through-a-hif-1%C3%AE-mapk-pathway
#19
Wen-Li Fang, De-Qiang Zhao, Fei Wang, Mei Li, Sheng-Nuo Fan, Wang Liao, Yu-Qiu Zheng, Shao-Wei Liao, Song-Hua Xiao, Ping Luan, Jun Liu
AIMS: The main purpose was to verify the potent capacity of Neurotropin® against neuronal damage in hippocampus and to explore its underlying mechanisms. METHODS: HT22 cells were treated with 40 μmol/L Aβ25-35 in the presence of various concentrations of Neurotropin® or in its absence. The cell viability was assessed with a CCK-8 assay, and flow cytometry was used to measure cell apoptosis, intracellular ROS levels, and mitochondrial membrane potential. Aβ plaques were examined by Bielschowsky silver staining, and the activities of antioxidants were detected in hippocampus of APP/PS1 mice after Neurotropin® treatment...
May 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28249251/tamarix-gallica-phenolics-protect-iec-6-cells-against-h2o2-induced-stress-by-restricting-oxidative-injuries-and-mapks-signaling-pathways
#20
Jamila Bettaib, Hélène Talarmin, Mickaël Droguet, Christian Magné, Mondher Boulaaba, Marie-Agnès Giroux-Metges, Riadh Ksouri
Polyphenolic compounds gained interest in the pharmaceutical research area due to their beneficial properties. Herein, antioxidant and cytoprotective capacities of T. gallica extract on H2O2-challenged rat small intestine epithelial cells were investigated. To set stress conditions, IEC-6 cultures were challenged with numerous H2O2 doses and durations. Then, 40μM H2O2 during 4h were selected to assess the cytoprotective effect of different T. gallica extract concentrations. Oxidative parameters, measured through CAT and SOD activities as well as MDA quantification were assessed...
February 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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