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Hemeoxygenase 1

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https://www.readbyqxmd.com/read/28098182/nephro-toxic-effects-of-intraperitoneally-injected-egcg-in-diabetic-mice-involvement-of-oxidative-stress-inflammation-and-apoptosis
#1
Nora O Abdel Rasheed, Lamiaa A Ahmed, Dalaal M Abdallah, Bahia M El-Sayeh
Epigallocatechin gallate (EGCG) has been studied for its beneficial effects. However, some case reports have associated EGCG supplementation with hepato-toxicity. In the present study, we investigated the possible nephro-toxic effects of EGCG in diabetic mice. Streptozotocin (150 mg/kg, i.p.) was injected in mice for diabetes induction. EGCG (100 mg/kg/day, i.p.) was then given for 4 days. The administration of EGCG to diabetic mice caused 60% mortality with no death recorded in other groups. Blood samples were collected for estimation of serum cystatin C, neutrophil gelatinase-associated lipocalin and blood urea nitrogen...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28062182/exposure-of-airway-epithelial-cells-to-pseudomonas-aeruginosa-biofilm-derived-quorum-sensing-molecules-decrease-the-activity-of-the-anti-oxidant-response-element-bound-by-nrf2
#2
Lucie Roussel, Simon Rousseau
Chronic bacterial infections in cystic fibrosis lung disease are often characterized by Pseudomonas aeruginosa biofilms that are regulated by bacterial intercellular signals termed quorum sensing (QS), such as N-(3-oxododecanoyl)-l-homoserine lactone (3OC12-HSL). This study reports that biofilm-derived exoproducts decrease the transcriptional activity of the anti-oxidant response element in bronchial epithelial cells. In a live co-culture assay of BEAS-2B cells and P. aeruginosa biofilm, the QS molecule 3OC12-HSL was an important but not sole contributor to the inhibition of basal NRF2 luciferase reporter activity...
January 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28025122/protective-effect-of-rutaecarpine-against-t-bhp-induced-hepatotoxicity-by-upregulating-antioxidant-enzymes-via-the-camkii-akt-and-nrf2-are-pathways
#3
Sun Woo Jin, Yong Pil Hwang, Chul Yung Choi, Hyung Gyun Kim, Se Jong Kim, Yongan Kim, Young Chul Chung, Kyung Jin Lee, Tae Cheon Jeong, Hye Gwang Jeong
Rutaecarpine, an indolopyridoquinazolinone alkaloid isolated from the unripe fruit of Evodia rutaecarpa, has been shown to have cytoprotective potential, but the molecular mechanism underlying this activity remains unclear. Our study was designed to investigate the cytoprotective effect of rutaecarpine against tert-butyl hydroperoxide (t-BHP) and to elucidate its action mechanism of action of rutaecarpine in a cultured HepG2 cell line and in mouse liver. Rutaecarpine decreased t-BHP-induced reactive oxygen species (ROS) production, cytotoxicity, and apoptosis in HepG2 cells...
February 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28012960/heme-oxygenase-ho-1-induction-prevents-endoplasmic-reticulum-stress-mediated-endothelial-cell-death-and-impaired-angiogenic-capacity
#4
Hatem Maamoun, Matshediso Zachariah, John H McVey, Fiona R Green, Abdelali Agouni
Most of diabetic cardiovascular complications are attributed to endothelial dysfunction and impaired angiogenesis. Endoplasmic Reticulum (ER) and oxidative stresses were shown to play a pivotal role in the development of endothelial dysfunction in diabetes. Hemeoxygenase-1 (HO-1) was shown to protect against oxidative stress in diabetes; however, its role in alleviating ER stress-induced endothelial dysfunction remains not fully elucidated. We aim here to test the protective role of HO-1 against high glucose-mediated ER stress and endothelial dysfunction and understand the underlying mechanisms with special emphasis on oxidative stress, inflammation and cell death...
December 21, 2016: Biochemical Pharmacology
https://www.readbyqxmd.com/read/27984168/the-protective-mechanism-of-docosahexaenoic-acid-in-mouse-model-of-parkinson-the-role-of-hemeoxygenase
#5
Ayse Ozkan, Hande Parlak, Gamze Tanriover, Sayra Dilmac, Seher Nasircilar Ulker, Llknur Birsen, Aysel Agar
Parkinson's disease (PD) is characterized by degeneration of the dopaminergic neurons in substantia nigra (SN). Its major clinical symptoms are tremor, rigidity, bradykinesia and postural instability. Docosahexaenoic acid (DHA) is an essential fatty acid for neural functions that resides within the neural membrane. A decline in fatty acid concentration is observed in case of neurodegenerative diseases such as PD. The present study aimed to explore the role of the heme oxygenase (HO) enzyme in protective effects of DHA administration in an experimental model of PD by using the neurotoxin 1-Methly-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)...
October 27, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27965540/rifampicin-attenuated-global-cerebral-ischemia-injury-via-activating-the-nuclear-factor-erythroid-2-related-factor-pathway
#6
Beibei Chen, Huimin Cao, Lili Chen, Xuemei Yang, Xiaoyan Tian, Rong Li, Oumei Cheng
Background: Recent studies have found that rifampicin has neuroprotective properties in neurodegenerative diseases. However, the exact mechanisms of action remain unclear. The nuclear factor erythroid 2-related factor 2 (Nrf2) has been considered a potential target for neuroprotection. In this study, we examined whether rifampicin exhibits beneficial effects mediated by the Nrf2 pathway after global cerebral ischemia (GCI). Methods: Rats were randomly assigned to four groups that included a sham group and three treatment groups with global ischemia-reperfusion [control, rifampicin, and rifampicin plus brusatol (an inhibitor of Nrf2)]...
2016: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/27960551/date-fruits-inhibit-hepatocyte-apoptosis-and-modulate-the-expression-of-hepatocyte-growth-factor-cytochrome-p450-2e1-and-heme-oxygenase-1-in-carbon-tetrachloride-induced-liver-fibrosis
#7
Nouf M Al-Rasheed, Hala A Attia, Raeesa A Mohamad, Nawal M Al-Rasheed, Musaed Al Fayez, Maha A Al-Amin
CONTEXT: Date fruits have protective effects against liver fibrosis; however their anti-apoptotic effects have not been investigated. OBJECTIVE: To investigate the modulating effects of date fruits on pro- and anti-apoptotic markers, cytochrome P450 2E1 (CYP2E1) and hepatocyte growth factor (HGF) in liver fibrosis. MATERIALS AND METHODS: Liver fibrosis was induced by injection of carbon tetrachloride (CCl4) for eight weeks. Date flesh extract (DFE) and pits extract (DPE) were taken daily concomitant with CCl4...
December 14, 2016: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/27907187/substance-p-induces-ho-1-expression-in-raw-264-7-cells-promoting-switch-towards-m2-like-macrophages
#8
Giovanna Montana, Nadia Lampiasi
Substance P (SP) is a neuropeptide that mediates many physiological as well as inflammatory responses. Recently, SP has been implicated in the resolution of inflammation through induction of M2 macrophages phenotype. The shift between M1-like and M2-like, allowing the resolution of inflammatory processes, also takes place by means of hemeoxygenase-1 (HO-1). HO-1 is induced in response to oxidative stress and inflammatory stimuli and modulates the immune response through macrophages polarisation. SP induces HO-1 expression in human periodontal ligament (PDL), the latter potentially plays a role in cytoprotection...
2016: PloS One
https://www.readbyqxmd.com/read/27861875/the-effect-of-nuclear-factor-erythroid-2-related-factor-antioxidant-response-element-signalling-pathway-in-the-lanthanum-chloride-induced-impairment-of-learning-and-memory-in-rats
#9
Lijin Zhang, Jinghua Yang, Cuihong Jin, Shengwen Wu, Xiaobo Lu, Xiaoyu Hu, Yaling Sun, Yuan Cai
Lanthanum exerts adverse effects on the central nervous system. However, the mechanism underlying these adverse effects has not been clarified. It is known that oxidative stress plays an important role in neurological injuries induced by harmful factors. Nuclear factor erythroid 2-related factor (Nrf2) is very important in the response to oxidative stress in tissues and cells. The purpose of this study was to explore the effect of lanthanum chloride (LaCl3 ) on the spatial learning and memory of rats and to determine whether the Nrf2/antioxidant response element pathway acts in the hippocampus...
November 10, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27829164/molecular-effects-of-1-naphthyl-methylcarbamate-and-solar-radiation-exposures-on-human-melanocytes
#10
Bianca Ferrucio, Manoela Tiago, Richard D Fannin, Liwen Liu, Kevin Gerrish, Silvya Stuchi Maria-Engler, Richard S Paules, Silvia Berlanga de Moraes Barros
Carbaryl (1-naphthyl-methylcarbamate), a broad-spectrum insecticide, has recently been associated with the development of cutaneous melanoma in an epidemiological cohort study with U.S. farm workers also exposed to ultraviolet radiation, the main etiologic factor for skin carcinogenesis. We hypothesized that carbaryl exposure may increase deleterious effects of UV solar radiation on skin melanocytes. This study aimed to characterize human melanocytes after individual or combined exposure to carbaryl (100μM) and solar radiation (375mJ/cm(2))...
February 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/27798431/hemeoxygenase-1-as-a-novel-driver-in-ritonavir-induced-insulin-resistance-in-hiv-1-infected-patients
#11
Ninon Taylor, Iris Kremser, Simon Auer, Gregor Hoermann, Richard Greil, Elisabeth Haschke-Becher, Harald Esterbauer, Lukas Kenner, Hannes Oberkofler
BACKGROUND: Hemeoxygenase-1 (HO-1) has recently been identified as a major driver of metaflammation and obesity-related insulin resistance (IR). Drug-induced IR increases cardiovascular risk within the HIV-1-infected population receiving antiretroviral therapy (ART). We therefore investigated a possible role of HO-1 in ART-induced IR. METHODS: Effects of HIV-1 protease inhibitor ritonavir and integrase inhibitor raltegravir on expression levels of HO-1 and proinflammatory cytokines including interleukin-1β (IL-1β), IL-6, IL-8, tumor necrosis factor-α (TNFα), Chemokine (C-C motif) ligand 5 (CCL5) and monocyte chemotactic protein 1 (MCP-1) were studied in monocyte and hepatocyte cell lines...
October 27, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27722926/mpp-lesioned-mice-an-experimental-model-of-motor-emotional-memory-learning-and-striatal-neurochemical-dysfunctions
#12
Mauricio P Cunha, Francis L Pazini, Vicente Lieberknecht, Josiane Budni, Ágatha Oliveira, Júlia M Rosa, Gianni Mancini, Leidiane Mazzardo, André R Colla, Marina C Leite, Adair R S Santos, Daniel F Martins, Andreza F de Bem, Carlos Alberto S Gonçalves, Marcelo Farina, Ana Lúcia S Rodrigues
The neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induces motor and nonmotor dysfunctions resembling Parkinson's disease (PD); however, studies investigating the effects of 1-methyl-4-phenylpyridinium (MPP(+)), an active oxidative product of MPTP, are scarce. This study investigated the behavioral and striatal neurochemical changes (related to oxidative damage, glial markers, and neurotrophic factors) 24 h after intracerebroventricular administration of MPP(+) (1.8-18 μg/mouse) in C57BL6 mice...
October 8, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27718123/ppar%C3%AE-regulates-inflammatory-reaction-by-inhibiting-the-mapk-nf-%C3%AE%C2%BAb-pathway-in-c2c12-skeletal-muscle-cells
#13
Jeong-Seok Kim, Young-Hee Lee, Yong-Uoo Chang, Ho-Keun Yi
Excessive exercise induces an inflammatory response caused by oxidative stress, which delays recovery of damaged muscle fibers. The reduction of inflammatory response is important for skeletal muscle homeostasis. Peroxisome proliferator-activated receptor gamma (PPARγ) is an anti-inflammatory molecule, but the role of PPARγ in skeletal muscle as anti-inflammatory activity is not clear. Thus, this study examined the anti-inflammatory role of PPARγ against H2O2-induced oxidative stress in skeletal muscle. Sprague Dawley (SD) rats were exercised on a treadmill to induce oxidative stress...
October 7, 2016: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/27592447/osteoblasts-activate-the-nrf2-signalling-pathway-in-response-to-arsenic-trioxide-treatment
#14
Pu-Rong Chiu, Yu-Chen Hu, Bau-Shan Hsieh, Tzu-Ching Huang, Hsiao-Ling Cheng, Li-Wen Huang, Kee-Lung Chang
Arsenic trioxide is used to treat a variety of leukaemia types and causes tumour cell death. However, it is not well known whether arsenic trioxide is toxic to bone osteoblast cells, the precursor cells from which leukaemia cells originate. The aim of this study was to examine the response of osteosarcoma cell line MG63 and primary cultured osteoblasts to arsenic trioxide treatment. After 24h of treatment, arsenic trioxide was more effective at inhibiting cell growth and increasing oxidative stress and DNA damage in MG63 cells than in osteoblasts...
October 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27472313/corynoline-isolated-from-corydalis-bungeana-turcz-exhibits-anti-inflammatory-effects-via-modulation-of-nfr2-and-mapks
#15
Chunjuan Yang, Chengyue Zhang, Zhibin Wang, Zhenqiu Tang, Haixue Kuang, Ah-Ng Tony Kong
Corydalis bungeana Turcz. is an anti-inflammatory medicinal herb used widely in traditional Chinese medicine for upper respiratory tract infections. It is demonstrated that corynoline is its active anti-inflammatory component. The nuclear factor-erythroid-2-related factor 2 (Nrf2)/antioxidant response element (ARE) pathway and the mitogen-activated protein kinase (MAPK) pathway play important roles in the regulation of inflammation. In this study, we investigated the potential anti-inflammatory mechanism of corynoline through modulation of Nfr2 and MAPKs...
July 27, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27465531/the-repair-of-skeletal-muscle-requires-iron-recycling-through-macrophage-ferroportin
#16
Gianfranca Corna, Imma Caserta, Antonella Monno, Pietro Apostoli, Angelo A Manfredi, Clara Camaschella, Patrizia Rovere-Querini
Macrophages recruited at the site of sterile muscle damage play an essential role in the regeneration of the tissue. In this article, we report that the selective disruption of macrophage ferroportin (Fpn) results in iron accumulation within muscle-infiltrating macrophages and jeopardizes muscle healing, prompting fat accumulation. Macrophages isolated from the tissue at early time points after injury express ferritin H, CD163, and hemeoxygenase-1, indicating that they can uptake heme and store iron. At later time points they upregulate Fpn expression, thus acquiring the ability to release the metal...
September 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27452798/melatonin-modulates-glucocorticoid-receptor-mediated-inhibition-of-antioxidant-response-and-apoptosis-in-peripheral-blood-mononuclear-cells
#17
Amaresh Kumar Singh, Chandana Haldar
Pineal melatonin is known for its immunomodulatory and anti-stress properties. It modulates stress condition by regulating antioxidant responses and apoptosis in the immune cells. Stress causes increased glucocorticoid level that acts through glucocorticoid receptor (GR) and is translocated into nucleus under regulation of HSP90 based chaperone machinery. Melatonin influences glucocorticoid and GR mediated stress condition in rodents, but till date there are no reports which could suggest the effect of melatonin treatment on GR mediated apoptosis and inhibition of Nrf-2/hemeoxygenase-1 (HO-1) induced antioxidant status in immunocompetent cells (peripheral blood mononuclear cells; PBMCs)...
November 15, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27452038/tetramethylpyrazine-nitrone-improves-neurobehavioral-functions-and-confers-neuroprotection-on-rats-with-traumatic-brain-injury
#18
Gaoxiao Zhang, Fen Zhang, Tao Zhang, Jianbo Gu, Cuimei Li, Yewei Sun, Pei Yu, Zaijun Zhang, Yuqiang Wang
Oxidative stress is one of the major secondary injury mechanisms after traumatic brain injury (TBI). 2-[[(1,1-Dimethylethyl)oxidoimino]-methyl]-3,5,6-trimethylpyrazine (TBN), a derivative of the clinically used anti-stroke drug tetramethylpyrazine armed with a powerful free radical-scavenging nitrone moiety, has been demonstrated promising therapeutic efficacy in ischemic stroke and Parkinson's models. The present study aims to investigate the effects of TBN on behavioral function and neuroprotection in rats subjected to TBI...
November 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27436489/suppression-of-trpv4-channels-ameliorates-anti-dipsogenic-effects-under-hypoxia-in-the-subfornical-organ-of-rats
#19
Fan Yang, Li Zhou, Dong Wang, Li-Li Yang, Guo-Rong Yuan, Qing-Yuan Huang
The phenomenon of water intake reduction during the 1(st) day of hypobaric hypoxia has been known for a long time. However, the reason for the same is yet unknown. The transient receptor potential vanilloid (TRPV) channels, including TRPV1 and TRPV4, are located in the subfornical organ (SFO). These are calcium permeable cationic channels gated by various stimuli such as cell swelling, low pH, and high temperature, and participate in anti-dipsogenic effects when activated. We aimed to explore the drinking behavior of rats and the mechanism of TRPVs under hypoxia...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27434663/limonene-and-its-ozone-initiated-reaction-products-attenuate-allergic-lung-inflammation-in-mice
#20
Jitka S Hansen, Asger W Nørgaard, Ismo K Koponen, Jorid B Sørli, Maya D Paidi, Søren W K Hansen, Per Axel Clausen, Gunnar D Nielsen, Peder Wolkoff, Søren Thor Larsen
Inhalation of indoor air pollutants may cause airway irritation and inflammation and is suspected to worsen allergic reactions. Inflammation may be due to mucosal damage, upper (sensory) and lower (pulmonary) airway irritation due to activation of the trigeminal and vagal nerves, respectively, and to neurogenic inflammation. The terpene, d-limonene, is used as a fragrance in numerous consumer products. When limonene reacts with the pulmonary irritant ozone, a complex mixture of gas and particle phase products is formed, which causes sensory irritation...
November 2016: Journal of Immunotoxicology
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