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Hemeoxygenase 1

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
Lijin Zhang, Jinghua Yang, Cuihong Jin, Shengwen Wu, Xiaobo Lu, Xiaoyu Hu, Yaling Sun, Yuan Cai
Lanthanum (La) 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. 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/ARE pathway acts in the hippocampus...
November 10, 2016: Journal of Neurochemistry
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))...
November 6, 2016: Toxicology in Vitro: An International Journal Published in Association with BIBRA
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
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
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
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
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...
2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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
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
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...
July 25, 2016: Neurochemical Research
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
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...
July 19, 2016: Journal of Immunotoxicology
Raul Sousa Freitas, Danielle Rocha do Val, Maria Ester Frota Fernandes, Francisco Isaac Fernandes Gomes, José Thalles Jocelino Gomes de Lacerda, Tatiane SantiGadelha, Carlos Alberto de Almeida Gadelha, Vicente de Paulo Teixeira Pinto, Gerardo Cristino-Filho, Karuza Maria Alves Pereira, Gerly Anne de Castro Brito, Mirna Marques Bezerra, Hellíada Vasconcelos Chaves
Temporomandibular joint (TMJ) disorders show inflammatory components, heavily impacting on quality of life. Abelmoschus esculentus is largely cultivated in Northeastern Brazil for medicinal purposes, having it shown anti-inflammatory activity. We evaluated A. esculentus lectin (AEL) efficacy in reducing zymosan-induced temporomandibular joint inflammatory hypernociception in rats along with the mechanism of action through which it exerts anti-inflammatory activity. Animals were pre-treated with AEL (0.01, 0...
September 2016: International Immunopharmacology
Miao Long, Shu-Hua Yang, Jian-Xin Han, Peng Li, Yi Zhang, Shuang Dong, Xinliang Chen, Jiayi Guo, Jun Wang, Jian-Bin He
Although grape-seed proanthocyanidin extract (GSPE) demonstrates strong anti-oxidant activity, little research has been done to clearly reveal the protective effects on the hepatotoxicity caused by zearalenone (ZEN). This study is to explore the protective effect of GSPE on ZEN-induced oxidative damage of liver in Kunming mice and the possible protective molecular mechanism of GSPE. The results indicated that GSPE could greatly reduce the ZEN-induced increase of serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities...
2016: International Journal of Molecular Sciences
Ayman I Elkady, Rania A Hussein, Sufian M El-Assouli
BACKGROUND: Colorectal cancer (CRC) is a major cause of morbidity and mortality, being the second most common type of cancer worldwide in both men and women. It accounts yearly for approximately 9% of all new cases of cancers. Furthermore, the current chemotherapeutic regimens seem unsatisfactory, so that exploration of novel therapeutic modalities is needed. The present study was undertaken to investigate the inhibitory effects of a crude alkaloid extract (CAERS) of a medicinal herb, Rhazya stricta, on proliferation of CRC HCT116 cells and to elucidate mechanisms of action...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
Tihomir Miralem, Nicole Lerner-Marmarosh, Peter E M Gibbs, Jermaine L Jenkins, Chelsea Heimiller, Mahin D Maines
Biliverdin reductase A (BVR) and Akt isozymes have overlapping pleiotropic functions in the insulin/PI3K/MAPK pathway. Human BVR (hBVR) also reduces the hemeoxygenase activity product biliverdin to bilirubin and is directly activated by insulin receptor kinase (IRK). Akt isoenzymes (Akt1-3) are downstream of IRK and are activated by phosphatidylinositol-dependent kinase 1 (PDK1) phosphorylating T(308) before S(473) autophosphorylation. Akt (RxRxxSF) and PDK1 (RFxFPxFS) binding motifs are present in hBVR. Phosphorylation of glycogen synthase kinase 3 (GSK3) isoforms α/β by Akts inhibits their activity; nonphosphorylated GSK3β inhibits activation of various genes...
August 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Wenwen Wang, Cuiwen Guan, Xiaozhe Sun, Zhongxiang Zhao, Jia Li, Xinlu Fu, Yuwen Qiu, Min Huang, Jing Jin, Zhiying Huang
BACKGROUND: Tanshinone IIA (Tan), the main active component of Salvia miltiorrhiza, has been demonstrated to have antioxidant activity. Acetaminophen (APAP), a widely used antipyretic and analgesic, can cause severe hepatotoxicity and liver failure when taken overdose. Oxidative stress has been reported to be involved in APAP-induced liver failure. PURPOSE: This study aimed to investigate the effect of Tan on APAP-induced hepatotoxicity and the underlying mechanisms involved...
June 1, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Shenglong Cao, Mingzhe Zheng, Ya Hua, Gao Chen, Richard F Keep, Guohua Xi
BACKGROUND AND PURPOSE: Hematoma clearance occurs in the days after intracerebral hemorrhage (ICH) and has not been well studied. In the current study, we examined changes in the hematoma in a piglet ICH model. The effect of deferoxamine on hematoma was also examined. METHODS: The ICH model was induced by an injection of autologous blood into the right frontal lobe of piglets. First, a natural time course of hematoma changes ≤7 days was determined. Second, the effect of deferoxamine on hematoma changes was examined...
June 2016: Stroke; a Journal of Cerebral Circulation
Dai Asada, Toshiyuki Itoi, Kihiro Nakamura, Kenji Hamaoka
BACKGROUND: Open-heart surgery-associated ischemia/reperfusion (I/R) injury affects the postoperative outcomes, and a leading cause of it is lipid peroxidation. However, it has been shown that congenital heart disease (CHD) patients are less sensitive to I/R injury. Although little is known about the underlying molecular mechanisms, some previous studies indicate that CHD-associated hypoxia alters the polyunsaturated fatty acid (PUFA) composition of membranes, which are the preferential targets for reactive oxygen species (ROS) generated during I/R...
April 21, 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
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