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Heme oxygenase

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https://www.readbyqxmd.com/read/28098837/casein-glycomacropeptide-hydrolysates-exert-cytoprotective-effect-against-cellular-oxidative-stress-by-up-regulating-ho-1-expression-in-hepg2-cells
#1
Tiange Li, Bin Chen, Min Du, Jiajia Song, Xue Cheng, Xu Wang, Xueying Mao
Oxidative stress is considered as an important mediator in the progression of metabolic disorders. The objective of this study was to investigate the potential hepatoprotective effects and mechanisms of bovine casein glycomacropeptide hydrolysates (GHP) on hydrogen peroxide (H₂O₂)-induced oxidative damage in HepG2 cells. Results showed that GHP significantly blocked H₂O₂-induced intracellular reactive oxygen species (ROS) generation and cell viability reduction in a dose-dependent manner. Further, GHP concentration-dependently induced heme oxygenase-1 (HO-1) expression and increased nuclear factor-erythroid 2-related factor 2 (Nrf2) nuclear translocation...
January 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28098243/vanillic-acid-attenuates-a%C3%AE-1-42-induced-oxidative-stress-and-cognitive-impairment-in-mice
#2
Faiz Ul Amin, Shahid Ali Shah, Myeong Ok Kim
Increasing evidence demonstrates that β-amyloid (Aβ) elicits oxidative stress, which contributes to the pathogenesis and disease progression of Alzheimer's disease (AD). The aims of the present study were to determine and explore the antioxidant nature and potential mechanism of vanillic acid (VA) in Aβ1-42-induced oxidative stress and neuroinflammation mediated cognitive impairment in mice. An intracerebroventricular (i.c.v.) injection of Aβ1-42 into the mouse brain triggered increased reactive oxygen species (ROS) levels, neuroinflammation, synaptic deficits, memory impairment, and neurodegeneration...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097517/in-utero-exposure-of-hyperlipidemic-mice-to-diesel-exhaust-lack-of-effects-on-atherosclerosis-in-adult-offspring-fed-a-regular-chow-diet
#3
Jenna Harrigan, Divya Ravi, Jerry Ricks, Michael E Rosenfeld
Uterine stress is associated with an increased risk of later life metabolic diseases. In this study, we investigated the effect of diesel exhaust (DE) exposure in utero on adult susceptibility to atherosclerosis in genetically hyperlipidemic mice. Pregnant apolipoprotein E-deficient mice received either DE exposure (~250-300 μg/m(3) PM2.5 for 6 h/day, 5 days/week) or filtered air (FA) throughout gestation. Treatment effects on litter size and gender distribution were recorded. Plasma cholesterol and triglycerides were measured at 8, 12 and 16 weeks of age...
January 17, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28096675/the-role-of-heme-oxygenase-1-ho-1-in-the-regulation-of-inflammatory-reaction-neuronal-cell-proliferation-and-apoptosis-in-rats-after-intracerebral-hemorrhage-ich
#4
Xuezheng Fan, Linshen Mu
OBJECTIVE: To investigate the role of heme oxygenase-1 (HO-1) in the regulation of inflammatory reaction, neuronal cell proliferation and apoptosis in rats after intracerebral hemorrhage (ICH). METHODS: Thirty-six adult Sprague Dawley (SD) male rats were randomly divided into sham operation, ICH and zinc protoporphyrin (ZPP) group. Rats (except for the sham operation group) were given 50 μL stereotactic injection of autologous blood from the femoral artery into the caudate nucleus, to establish an ICH model...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28093607/osmopriming-induced-salt-tolerance-during-seed-germination-of-alfalfa-most-likely-mediates-through-h2o2-signaling-and-upregulation-of-heme-oxygenase
#5
Rayhaneh Amooaghaie, Fatemeh Tabatabaie
The present study showed that osmopriming or pretreatment with low H2O2 doses (2 mM) for 6 h alleviated salt-reduced seed germination. The NADPH oxidase activity was the main source, and superoxide dismutase (SOD) activity might be a secondary source of H2O2 generation during osmopriming or H2O2 pretreatment. Hematin pretreatment similar to osmopriming improved salt-reduced seed germination that was coincident with the enhancement of heme oxygenase (HO) activity. The semi-quantitative RT-PCR confirmed that osmopriming or H2O2 pretreatment was able to upregulate heme oxygenase HO-1 transcription, while the application of N,N-dimethyl thiourea (DMTU as trap of endogenous H2O2) and diphenyleneiodonium (DPI as inhibitor of NADPHox) not only blocked the upregulation of HO but also reversed the osmopriming-induced salt attenuation...
January 16, 2017: Protoplasma
https://www.readbyqxmd.com/read/28093052/erk-nrf2-ho-1-pathway-mediated-mitophagy-alleviates-traumatic-brain-injury-induced-intestinal-mucosa-damage-and-epithelial-barrier-dysfunction
#6
Yinlong Liu, Zhongyuan Bao, Xiupeng Xu, Honglu Chao, Chao Lin, Zheng Li, Yan Liu, Xiaoming Wang, Yongping You, Ning Liu, Jing Ji
Gastrointestinal dysfunction is one of several physiologic complications in patients with traumatic brain injury (TBI). TBI can result in increased intestinal permeability due to apoptosis of intestinal epithelial cells, which contain a large number of mitochondria for persisting barrier function. Autophagy of damaged mitochondria (mitophagy) controls the quality of the mitochondria and regulates cellular homeostasis. However, the exact mechanism of mitophagy that underlies the pathological changes induced by TBI is unknown...
January 16, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28092839/effect-and-mechanism-of-sorbus-pohuashanensis-hante-hedl-flavonoids-protect-against-arsenic-trioxide-induced-cardiotoxicity
#7
Xiaojin Yu, Zhenyu Wang, Zunpeng Shu, Zhengqing Li, Yuan Ning, Keli Yun, Haina Bai, Ruihai Liu, Wenli Liu
The cardiotoxicity of arsenic trioxide (ATO) limits its clinical application in cancer treatment. Evidences suggest that sorbus has antioxidant activity and its consumption has been linked with improved cardioprotection. In this study, we investigated the cardio-protective effect and mechanisms of Sorbus pohuashanensis (Hante) Hedl. flavonoids (SPF) against ATO in BALB/c mice and H9c2 cells. Eleven major flavonoids were confirmed by ultra-performance liquid chromatography electrospray ionization quadrupole time of flight mass spectrometry (UPLC-ESI-Q-TOF-MS)...
January 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28089712/effect-of-heme-oxygenase-1-on-ochratoxin-a-induced-nephrotoxicity-in-mice
#8
Agnieszka Loboda, Anna Stachurska, Paulina Podkalicka, Mateusz Sobczak, Olga Mucha, Agnieszka Witalisz-Siepracka, Alicja Jozkowicz, Jozef Dulak
Heme oxygenase-1 (HO-1), a heme-degrading enzyme, is suggested to play an important role in kidney pathophysiology, mostly due to its anti-fibrotic, anti-apoptotic and anti-oxidant properties. One of the mycotoxin, ochratoxin A (OTA) was previously shown to affect HO-1 expression, however, the mechanisms of OTA-induced nephrotoxicity during HO-1 deficiency are unknown. We have shown that OTA regulates the number of pro-fibrotic, pro-inflammatory, anti-oxidative and pro-apoptotic factors in HO-1 dependent manner, as the lack of HO-1 accelerates whereas the induction of HO-1 expression by cobalt protoporphyrin (CoPP) attenuates nephrotoxic effect of OTA...
January 9, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28089584/pterostilbene-attenuates-high-glucose-induced-oxidative-injury-in-hippocampal-neuronal-cells-by-activating-nuclear-factor-erythroid-2-related-factor-2
#9
Yang Yang, Chongxi Fan, Bodong Wang, Zhiqiang Ma, Dongjin Wang, Bing Gong, Shouyin Di, Shuai Jiang, Yue Li, Tian Li, Zhi Yang, Erping Luo
In the present study, neuroblastoma (SH-SY5Y) cells were used to investigate the mechanisms mediating the potential protective effects of pterostilbene (PTE) against mitochondrial metabolic impairment and oxidative stress induced by hyperglycemia for mimicking the diabetic encephalopathy. High glucose medium (100 mM) decreased cellular viability after 24 h incubation which was evidenced by: (i) reduced mitochondrial complex I and III activities; (ii) reduced mitochondrial cytochrome C; (iii) increased reactive oxygen species (ROS) generation; (iv) decreased mitochondrial membrane potential (ΔΨm); and (v) increased lactate dehydrogenase (LDH) levels...
January 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28088909/synergistic-interaction-between-heme-oxygenase-ho-and-nuclear-factor-e2-related-factor-2-nrf2-against-oxidative-stress-in-cardiovascular-related-diseases
#10
Joseph Fomusi Ndisang
BACKGROUND: Nuclear factor-erythroid related factor-2 (Nrf2) is a master regulator of transcriptional activation of anti-oxidants in cells. Similarly, heme oxygenase (HO) is a cytoprotective protein with anti-oxidant effects. This review article will shed more light on the interaction between Nrf2 and HO. METHODS AND RESULTS: A PubMed search was done for recent articles on Nrf2 and HO. These studies suggested that under normal physiological conditions, Nrf2 is bound within the cytoplasm to its repressor, Kelch-like ECH-associated protein (Keap1), an oxidative stress sensor...
January 13, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28078083/over-expression-of-toll-like-receptor-2-up-regulates-heme-oxygenase-1-expression-and-decreases-oxidative-injury-in-dairy-goats
#11
Shoulong Deng, Kun Yu, Wuqi Jiang, Yan Li, Shuotian Wang, Zhuo Deng, Yuchang Yao, Baolu Zhang, Guoshi Liu, Yixun Liu, Zhengxing Lian
BACKGROUND: Mastitis, an infection caused by Gram-positive bacteria, produces udder inflammation and oxidative injury in milk-producing mammals. Toll-like receptor 2 (TLR2) is important for host recognition of invading Gram-positive microbes. Over-expression of TLR2 in transgenic dairy goats is a useful model for studying various aspects of infection with Gram-positive bacteria, in vivo. METHODS: We over-expressed TLR2 in transgenic dairy goats. Pam3CSK4, a component of Gram-positive bacteria, triggered the TLR2 signal pathway by stimulating the monocytes-macrophages from the TLR2-positive transgenic goats, and induced over-expression of activator protein-1 (AP-1), phosphatidylinositol 3-kinase (PI3K) and transcription factor nuclear factor kappa B (NF-κB) and inflammation factors downstream of the signal pathway...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28074650/revisiting-the-val-ile-mutation-in-mammalian-and-bacterial-no-synthases-a-spectroscopic-and-kinetic-study
#12
Marine Weisslocker-Schaetzel, Mehdi Lembrouk, Jerome Santolini, Pierre Dorlet
Nitric oxide (NO) is produced in mammals by the nitric oxide synthase (NOS) isoforms at a catalytic site comprising a heme associated with a biopterin cofactor. Through genome sequencing, proteins with high homology to the oxygenase domain of NOSs have been identified, in particular in bacteria. The active site is highly conserved except for a valine residue in the distal pocket that is replaced by an isoleucine in bacteria. This switch was previously reported to influence the kinetics of the reaction. We have used the V346I mutant of the mouse inducible NOS (iNOS) as well as the I224V mutant of the NOS from Bacillus subtilis (bsNOS) to study their spectroscopic signatures in solution and look for potential structural differences compared to their respective wild types...
January 11, 2017: Biochemistry
https://www.readbyqxmd.com/read/28070834/resveratrol-modulates-gsh-system-in-c6-astroglial-cells-through-heme-oxygenase-1-pathway
#13
Bernardo Assein Arús, Débora Guerini Souza, Bruna Bellaver, Diogo Onofre Souza, Carlos-Alberto Gonçalves, André Quincozes-Santos, Larissa Daniele Bobermin
Resveratrol is a dietary polyphenol that displays neuroprotective properties in several in vivo and in vitro experimental models, by modulating oxidative and inflammatory responses. Glutathione (GSH) is a key antioxidant in the central nervous system (CNS) that modulates several cellular processes, and its depletion is associated with oxidative stress and inflammation. Therefore, this study sought to investigate the protective effects of resveratrol against GSH depletion pharmacologically induced by buthionine sulfoximine (BSO) in C6 astroglial cells, as well as its underlying cellular mechanisms...
January 9, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28069109/immunomodulatory-effects-of-bone-marrow-mesenchymal-stem-cells-overexpressing-heme-oxygenase-1-protective-effects-on-acute-rejection-following-reduced-size-liver-transplantation-in-a-rat-model
#14
Zhong-Yang Shen, Bin Wu, Tao Liu, Yang Yang, Ming-Li Yin, Wei-Ping Zheng, Bo-Ya Zhang, Hong-Li Song
Here we explore the T-lymphocyte suppressive and immunomodulatory effects of bone marrow mesenchymal stem cells (BMMSCs) overexpressing heme oxygenase-1 (HO-1) on acute rejection following reduced-size liver transplantation (RLT) in a rat model. The proliferation activity, cell cycle progression, secretion of proinflammatory cytokines, expression of CD25 and CD71 in lymphocytes, and activity of NK cells were found to be significantly lowered, and the proportion of regulatory T cells (Tregs) was found to be increased relative to BMMSCs when Adv-HO-1/BMMSCs were co-cultured with Con A ex vivo; secretion of anti-inflammatory cytokines was significantly higher...
December 26, 2016: Cellular Immunology
https://www.readbyqxmd.com/read/28068647/berberine-an-isoquinoline-alkaloid-suppresses-txnip-mediated-nlrp3-inflammasome-activation-in-msu-crystal-stimulated-raw-264-7-macrophages-through-the-upregulation-of-nrf2-transcription-factor-and-alleviates-msu-crystal-induced-inflammation-in-rats
#15
Palani Dinesh, MahaboobKhan Rasool
The current study was designed to investigate the therapeutic potential of berberine on monosodium urate (MSU) crystal stimulated RAW 264.7 macrophages and in MSU crystal induced rats. Our results indicate that berberine (25, 50 and 75μM) suppressed the levels of pro-inflammatory cytokines (interleukin-1beta (IL-1β) and tumor necrosis factor alpha (TNFα)) and intracellular reactive oxygen species in MSU crystal stimulated RAW 264.7 macrophages. The mRNA expression levels of IL-1β, caspase 1, nucleotide-binding oligomerization domain-like receptor pyrin domain containing 3 (NLRP3), thioredoxin interacting protein (TXNIP) and kelch-like ECH-associated protein 1 (Keap1) were found downregulated with the upregulation of nuclear factor erythroid-2-related factor 2 (Nrf2) transcription factor and its associated anti-oxidant enzymes: Heme oxygenase I (HO-1), superoxide dismutase (SOD1), glutathione peroxidase (GPx), NADPH quinone oxidoreductase-1 (NQO1) and catalase (CAT) in MSU crystal stimulated RAW 264...
January 6, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28068646/sclareol-ameliorate-lipopolysaccharide-induced-acute-lung-injury-through-inhibition-of-mapk-and-induction-of-ho-1-signaling
#16
Yung-Hung Hsieh, Jeng-Shyan Deng, Hsin-Pao Pan, Jung-Chun Liao, Shyh-Shyun Huang, Guan-Jhong Huang
Sclareol is a natural fragrance compound that is used widely in the cosmetic and food industries. This study examined the effect of sclareol on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice. Mice were treated with sclareol 1h before an intratracheal (I.T.) LPS challenge to induce an ALI model. The effects on lung tissue and lung injury were evaluated 6h after LPS induction. Pretreatment with sclareol noticeably improved the LPS-induced histological alterations and edema in lung tissue. Sclareol also inhibited the release of pro-inflammatory mediators...
January 6, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28068636/citrus-leaf-extract-reduces-blood-pressure-and-vascular-damage-in-repeatedly-heated-palm-oil-diet-induced-hypertensive-rats
#17
Hawa Nordin Siti, Yusof Kamisah, Mohd Ishak Nur Iliyani, Suhaila Mohamed, Kamsiah Jaarin
Prolonged consumption of repeatedly heated vegetable oil increases blood pressure. This study aimed to determine the effects of Citrus leaf extract, (CLE) on blood pressure, blood pressure-regulating enzymes and mediators, as well as aortic histomorphometry in heated palm oil induced-hypertension. Male Sprague Dawley rats (n=56) were divided into seven groups; control group was given normal diet and the other groups were fed with palm oil-enriched diet (15% w/w) either fresh (FPO), five-time-heated (5HPO) or ten-time-heated (10HPO) with or without CLE (0...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28068626/effects-of-the-activation-of-heme-oxygenase-1-on-hormonal-and-metabolic-changes-in-rats-fed-a-high-fat-diet
#18
Tomasz Szkudelski, Kamila Dłużewicz, Jan Sadoch, Katarzyna Szkudelska
Heme oxygenase-1 (HO-1) is the inducible isoform of the heme oxygenase system, which catalyzes heme degradation. Up-regulation of this enzyme under pathological conditions is associated with beneficial effects in the whole organism. However, the potential of HO-1 in the alleviation of disturbances induced by a high-fat diet (HFD) is poorly elucidated. The present study was undertaken to determine the effects of pharmacological activation of HO-1 by hemin on some hormones and metabolic parameters in rats fed an HFD for 8 weeks...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28068513/nrf2-dependent-induction-of-innate-host-defense-via-heme-oxygenase-1-inhibits-zika-virus-replication
#19
Hanxia Huang, Barry Falgout, Kazuyo Takeda, Kenneth M Yamada, Subhash Dhawan
We identified primary human monocyte-derived macrophages (MDM) as vulnerable target cells for Zika virus (ZIKV) infection. We demonstrate dramatic effects of hemin, the natural inducer of the heme catabolic enzyme heme oxygenase-1 (HO-1), in the reduction of ZIKV replication in vitro. Both LLC-MK2 monkey kidney cells and primary MDM exhibited hemin-induced HO-1 expression with major reductions of >90% in ZIKV replication, with little toxicity to infected cells. Silencing expression of HO-1 or its upstream regulatory gene, nuclear factor erythroid-related factor 2 (Nrf2), attenuated hemin-induced suppression of ZIKV infection, suggesting an important role for induction of these intracellular mediators in retarding ZIKV replication...
January 6, 2017: Virology
https://www.readbyqxmd.com/read/28065861/targeting-and-modulating-infarct-macrophages-with-hemin-formulated-in-designed-lipid-based-particles-improves-cardiac-remodeling-and-function
#20
Tamar Ben-Mordechai, David Kain, Radka Holbova, Natalie Landa, La-Paz Levin, Inbar Elron-Gross, Yifat Glucksam-Galnoy, Micha S Feinberg, Rimona Margalit, Jonathan Leor
Uncontrolled activation of pro-inflammatory macrophages after myocardial infarction (MI) accelerates adverse left ventricular (LV) remodeling and dysfunction. Hemin, an iron-containing porphyrin, activates heme oxygenase-1 (HO-1), an enzyme with anti-inflammatory and cytoprotective properties. We sought to determine the effects of hemin formulated in a macrophage-targeted lipid-based carrier (denoted HA-LP) on LV remodeling and function after MI. Hemin encapsulation efficiency was ~100% at therapeutic dose levels...
January 5, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
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