keyword
MENU ▼
Read by QxMD icon Read
search

Heme oxygenase

keyword
https://www.readbyqxmd.com/read/29457983/antimycobacterial-effect-of-ifng-interferon-gamma-induced-autophagy-is-dependent-on-the-hmox1-heme-oxygenase-1-mediated-increase-in-the-intracellular-calcium-levels-and-modulation-of-ppp3-calcineurin-tfeb-transcription-factor-eb-axis
#1
Nisha Singh, Pallavi Kansal, Zeeshan Ahmad, Naveen Baid, Hariom Kushwaha, Neeraj Khatri, Ashwani Kumar
IFNG (interferon gamma)-induced autophagy plays an important role in the elimination of intracellular pathogens, such as Mycobacterium tuberculosis (Mtb). However, the signaling cascade that leads to the increase in autophagy flux in response to IFNG is poorly defined. Here, we demonstrate that HMOX1 (heme oxygenase 1)-generated carbon monoxide (CO) is required for the induction of autophagy and killing of Mtb residing in macrophages in response to immunomodulation by IFNG. Interestingly, IFNG exposure of macrophages induces an increase in intracellular calcium levels that is dependent on HMOX1 generated CO...
February 19, 2018: Autophagy
https://www.readbyqxmd.com/read/29456553/silencing-of-iron-and-heme-related-genes-revealed-a-paramount-role-of-iron-in-the-physiology-of-the-hematophagous-vector-rhodnius-prolixus
#2
Ana B Walter-Nuno, Mabel L Taracena, Rafael D Mesquita, Pedro L Oliveira, Gabriela O Paiva-Silva
Iron is an essential element for most organisms However, free iron and heme, its complex with protoporphyrin IX, can be extremely cytotoxic, due to the production of reactive oxygen species, eventually leading to oxidative stress. Thus, eukaryotic cells control iron availability by regulating its transport, storage and excretion as well as the biosynthesis and degradation of heme. In the genome of Rhodnius prolixus , the vector of Chagas disease, we identified 36 genes related to iron and heme metabolism We performed a comprehensive analysis of these genes, including identification of homologous genes described in other insect genomes...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29454190/potholing-of-the-hydrophobic-heme-oxygenase-1-western-region-for-the-search-of-potent-and-selective-imidazole-based-inhibitors
#3
Loredana Salerno, Emanuele Amata, Giuseppe Romeo, Agostino Marrazzo, Orazio Prezzavento, Giuseppe Floresta, Valeria Sorrenti, Ignazio Barbagallo, Antonio Rescifina, Valeria Pittalà
Here we report the design, synthesis, and molecular modeling of new potent and selective imidazole-based HO-1 inhibitors in which the imidazole nucleus and the hydrophobic groups are linked by a phenylethanolic spacer. Most of the tested compounds showed a good inhibitor activity with IC 50 values in the low micromolar range, with two of them (1b and 1j) exhibiting also high selectivity toward HO-2. These results were obtained by the idea of potholing the entire volume of the principal hydrophobic western region with an appropriate ligand volume...
February 9, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29453720/cytotoxic-effect-of-chlorpyrifos-is-associated-with-activation-of-nrf-2-ho-1-system-and-inflammatory-response-in-tongue-of-male-wistar-rats
#4
Norhan M El-Sayed, Amal A M Ahmed, Manar A A Selim
Repeated administration of chlorpyrifos (CPF), an organophosphate pesticide, can increase the risk of oral cytotoxicity. The current study was designed to assess the mechanism by which CPF mediates its cytotoxic effect on lingual mucosa of rats. Twenty-four male Wistar rats were used in the present study and divided into three groups: group I: healthy rats (negative control), group II: rats treated with CPF 1/40 LD50 (3.375 mg/kg, orally/daily) for 28 days, group III: rats treated with CPF 1/10 LD50 (13.5 mg/kg, orally/daily) for 28 days...
February 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29452096/the-macrophage-heme-heme-oxygenase-1-system-and-its-role-in-inflammation
#5
REVIEW
Vijith Vijayan, Frank A D T G Wagener, Stephan Immenschuh
Heme oxygenase (HO)-1, the inducible isoform of the heme-degrading enzyme HO, plays a critical role in inflammation and iron homeostasis. Regulatory functions of HO-1 are mediated via the catalytic breakdown of heme, which is an iron-containing tetrapyrrole complex with potential pro-oxidant and pro-inflammatory effects. The HO reaction produces the antioxidant and anti-inflammatory compounds carbon monoxide (CO) and biliverdin, subsequently converted into bilirubin, along with iron, which is reutilized for erythropoiesis...
February 13, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29449858/exogenous-hydrogen-peroxide-contributes-to-heme-oxygenase-1-delaying-programmed-cell-death-in-isolated-aleurone-layers-of-rice-subjected-to-drought-stress-in-a-cgmp-dependent-manner
#6
Guanghui Wang, Yu Xiao, Xiaojiang Deng, Heting Zhang, Tingge Li, Huiping Chen
Hydrogen peroxide (H 2 O 2 ) is a reactive oxygen species (ROS) that plays a dual role in plant cells. Here, we discovered that drought (20% polyethylene glycol-6000, PEG)-triggered decreases of HO-1 transcript expression and HO activity. However, exogenous H 2 O 2 contributed toward the increase in HO-1 gene expression and activity of the enzyme under drought stress. Meanwhile, the HO-1 inducer hematin could mimic the effects of the H 2 O 2 scavengers ascorbic acid (AsA) and dimethylthiourea (DMTU) and the H 2 O 2 synthesis inhibitor diphenyleneiodonium (DPI) for scavenging or diminishing drought-induced endogenous H 2 O 2 ...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29436680/curcumin-increases-cholesterol-efflux-via-heme-oxygenase%C3%A2-1%C3%A2-mediated-abca1-and-sr%C3%A2-bi-expression-in-macrophages
#7
Yi Zhong, Jian Feng, Zhongcai Fan, Jiafu Li
Curcumin, which is an extract from a traditional Chinese medicine, has previously been demonstrated to exhibit an anti‑atherosclerotic effect, which is closely associated with an increase in cholesterol efflux. However, it is unclear as to whether the increased effect is mediated by heme oxygenase (HO)‑1. Macrophages were treated with different concentrations of curcumin, HO‑1 inhibitor and small interfering (si)RNA in different experiments. Analysis of protein expression was conducted via western blotting...
February 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29436598/madecassoside-activates-anti%C3%A2-neuroinflammatory-mechanisms-by-inhibiting-lipopolysaccharide%C3%A2-induced-microglial-inflammation
#8
Andrew Octavian Sasmita, Anna Pick Kiong Ling, Kenny Gah Leong Voon, Rhun Yian Koh, Ying Pei Wong
Neurodegeneration is typically preceded by neuroinflammation generated by the nervous system to protect itself from tissue damage, however, excess neuroinflammation may inadvertently cause more harm to the surrounding tissues. Attenuating neuroinflammation with non‑steroidal anti‑inflammatory drugs can inhibit neurodegeneration. However, such treatments induce chronic side effects, including stomach ulcers. Madecassoside, a triterpene derived from Centella asiatica, is considered to be an alternative treatment of inflammation...
February 9, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29433360/ampk-nrf2-signaling-is-involved-in-the-anti-neuroinflammatory-action-of-petatewalide-b-from-petasites-japonicus-against-lipopolysaccharides-in-microglia
#9
Sun Young Park, Min Hyun Choi, Mei Li, Ke Li, Geuntae Park, Young-Whan Choi
OBJECTIVES: Abnormal microglia secrete neuroinflammatory factors that play a pivotal role in neurodegenerative-disorder development. Thus, regulating abnormal microglia-activation could be a promising therapeutic strategy. The purposes of this study included investigating the effect of Petatewalide B on lipopolysaccharide- (LPS-) stimulated microglia and exploring the role of the AMPK/Nrf2- (adenosine monophosphate-activated protein kinase/nuclear factor erythroid 2-related factor 2) signaling pathway in the anti-neuroinflammatory function of Petatewalide B...
February 12, 2018: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/29429149/carbon-monoxide-ameliorates-6-hydroxydopamine-induced-cell-death-in-c6-glioma-cells
#10
Hyewon Moon, Jung-Hee Jang, Tae Chang Jang, Gyu Hwan Park
Carbon monoxide (CO) is well-known as toxic gas and intrinsic signaling molecule such as neurotransmitter and blood vessel relaxant. Recently, it has been reported that low concentration of CO exerts therapeutic actions under various pathological conditions including liver failure, heart failure, gastric cancer, and cardiac arrest. However, little has been known about the effect of CO in neurodegenerative diseases like Parkinson's disease (PD). To test whether CO could exert a beneficial action during oxidative cell death in PD, we examined the effects of CO on 6-hydroxydopamine (6-OHDA)-induced cell death in C6 glioma cells...
February 12, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29425821/mmp9-is-involved-in-ho-1-mediated-upregulation-of-apical-junctional-complex-in-caco-2-cells-under-oxygen-glucose-deprivation
#11
Yongqu Lu, Jie An, Yulin Liu, Lehao Ren, Li Zhang
Ischemia reperfusion injury is a critical factor in the recovery process after intestine trauma and the functional restoration of intestinal reconstruction. This study was the first to explore the expression of apical junctional complex (AJC) induced by heme oxygenase-1 (HO-1) in Caco-2 cells in oxygen-glucose deprivation (OGD) models. Here we showed that HO-1 was upregulated after OGD. Notably, activation of HO-1 largely enhanced the expression of AJC proteins including Claudin-4, E-cadherin and β-catenin in Caco-2 cells, but decreased the expression of matrix metalloproteinase 9 (MMP9)...
February 6, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29421595/improvement-of-cisplatin-induced-renal-dysfunction-by-schisandra-chinensis-stems-via-anti-inflammation-and-anti-apoptosis-effects
#12
Yan-Zi Li, Shen Ren, Xiao-Tong Yan, Yin-Shi Sun, Hui-Ping Li, Wei Li, Ying-Ying Liu, Zi Wang
ETHNOPHARMACOLOGICAL RELEVANCE: Schisandra chinensis (Turcz.) Baill (S. chinensis) is a frequently used traditional Chinese medicine, and modern pharmacological research has proven that S. chinensis has antioxidant, anti-hepatotox, anti-inflammatory, and anti-nephrotoxic effects. Cisplatin is widely used as antineoplastic drug at presenteffects, but the clinical application of cisplatin is limitedowing to nephrotoxicity. AIM OF THE STUDY: To demonstrate the renoprotective activity of the extract of the stems of Schisandra chinensis (SCE) in model mice established by cisplatin triggering acute kidney injury (AKI)...
February 5, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29421327/nrf2-protects-human-lens-epithelial-cells-against-h2o2-induced-oxidative-and-er-stress-the-atf4-may-be-involved
#13
Tian-Ju Ma, Di-Hui Lan, Shou-Zhi He, Zi Ye, Peng Li, Wei Zhai, Wen-Qian Chen, Yang Huang, Yu Fu, Ang Sun, Yi-Bing Wang, Zheng Ye, Jing-Lan Li, Yi Gao, Xin-Lin Yan, Zhao-Hui Li
Our previous study has shown heme oxygenase-1 (HO-1) protects human lens epithelial cells (LECs) against H2O2-induced oxidative stress and apoptosis. Nrf2, the major regulator of HO-1, is triggered during the mutual induction of oxidative stress and ER stress. In response to ER stress, unfolded protein response (UPR) serves as a program of transcriptional and translational regulation mechanism with PERK involved. Both Nrf2 and ATF4 are activated as the downstream effect of PERK signaling coordinating the convergence of dual stresses...
February 2, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29421041/characterization-of-a-topologically-unique-oxygenase-from-sphingobium-sp-pnb-capable-of-catalyzing-a-broad-spectrum-of-aromatics
#14
Pratick Khara, Madhumita Roy, Joydeep Chakraborty, Arindam Dutta, Tapan K Dutta
A Rieske non-heme iron ring-hydroxylating oxygenase (RHO) from Sphingobium sp. PNB involved in the initial oxidation of a wide range of low and high molecular weight polycyclic aromatic hydrocarbons (PAHs) was investigated. The RHO was shown to comprise of the gene products of distantly located ahdA1f-ahdA2f, ahdA3 and ahdA4 genes, which encoded the oxygenase α- and β-subunits, ferredoxin and reductase, respectively. In silico structural analysis of AhdA1f revealed a very large substrate-binding pocket, satisfying the spatial requirements to accommodate high molecular weight substrates...
April 2018: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/29414777/a-cross-domain-charge-interaction-governs-the-activity-of-no-synthase
#15
Mohammad Mahfuzul Haque, Jesus Tejero, Mekki Bayachou, Claire T Kenney, Dennis J Stuehr
NO synthase (NOS) enzymes perform inter-domain electron transfer reactions during catalysis that may rely on complementary charge interactions at domain-domain interfaces. Guided by our previous results and a computer-generated domain docking model, we assessed the importance of cross-domain charge interactions in the FMN to heme electron transfer in neuronal NOS (nNOS). We reversed the charge of three residues (Glu-762, Glu-816, Glu-819) that form an electronegative triad on the FMN domain, and then individually reversed the charges of three electropositive residues (Lys-423, Lys-620, Lys-660) on the oxygenase domain (NOSoxy), to potentially restore a cross-domain charge interaction with the triad, but in reversed polarity...
February 2, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29414639/oxyresveratrol-prevents-lipopolysaccharide-d-galactosamine-induced-acute-liver-injury-in-mice
#16
Ya-Nan Jia, Hai-Peng Lu, Ya-Lin Peng, Bao-Shun Zhang, Xiao-Bao Gong, Jun Su, You Zhou, Min-Hui Pan, Li Xu
Oxyresveratrol (Oxy) is a natural polyhydroxystilbene abundant in mulberry that has anti-inflammation and anti-oxidant activities. We evaluated the protective effect of Oxy in the context of the lipopolysaccharide and d-galactosamine (LPS/d-GalN) induced acute liver injury. Oxy restricted the development of histopathological changes, markedly reduced the activity of alanine transaminase (ALT) and aspartate transaminase (AST), which are indicators of impaired liver function. Oxy significantly regulated the contents of oxidative stress related enzymes and products, and inhibited expressions of inflammatory mediators and cytokines...
January 23, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29411263/naringenin-exerts-anti-inflammatory-effects-in-paraquat-treated-sh-sy5y-cells-through-a-mechanism-associated-with-the-nrf2-ho-1-axis
#17
Marcos Roberto de Oliveira, Cláudia Marlise Balbinotti Andrade, Cristina Ribas Fürstenau
Naringenin (NGN; 5,7-dihydroxy-2-(4-hydroxyphenyl)-2,3-dihydrochromen-4-one; C15H12O5), a flavanone, is found in citrus fruits and has been viewed as an antioxidant and anti-inflammatory agent. NGN is a potent inducer of the nuclear factor erythroid 2-related factor 2 (Nrf2) and upregulates the expression of heme oxygenase-1 (HO-1), an enzyme exhibiting both antioxidant and anti-inflammatory effects. The complete mechanism by which NGN exerts anti-inflammatory actions is not completely understood yet. Therefore, we investigated here whether NGN would be able to reduce the inflammation induced by paraquat (PQ) in SH-SY5Y cells...
February 6, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29410018/linagliptin-potentiates-the-effect-of-l-dopa-on-the-behavioural-biochemical-and-immunohistochemical-changes-in-experimentally-induced-parkinsonism-role-of-toll-like-receptor-4-tgf-%C3%AE-1-nf-%C3%AE%C2%BAb-and-glucagon-like-peptide-1
#18
Ahmed M Kabel, Mohamed S Omar, Abdulrahman Alhadhrami, Salman S Alharthi, Majed M Alrobaian
OBJECTIVE: Our aim was to assess the effect of different doses of linagliptin with or without l-dopa/Carbidopa on 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced parkinsonism in mice. METHODS: Eighty Balb/c mice were divided into 8 equal groups: Control; MPTP; MPTP + l-dopa/Carbidopa; MPTP + linagliptin 3 mg/kg/day; MPTP + linagliptin 10 mg/kg/day; MPTP + Carboxymethyl cellulose; MPTP + l-dopa/Carbidopa + linagliptin 3 mg/kg/day and MPTP + l-dopa/Carbidopa + linagliptin 10 mg/kg/day...
January 30, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29409696/fur-regulation-of-staphylococcus-aureus-heme-oxygenases-is-required-for-heme-homeostasis
#19
Lisa J Lojek, Allison J Farrand, Andy Weiss, Eric P Skaar
Heme is a cofactor that is essential for cellular respiration and for the function of many enzymes. If heme levels become too low within the cell, S. aureus switches from producing energy via respiration to producing energy by fermentation. S. aureus encodes two heme oxygenases, IsdI and IsdG, which cleave the porphyrin heme ring releasing iron for use as a nutrient source. Both isdI and isdG are only expressed under low iron conditions and are regulated by the canonical Ferric Uptake Regulator (Fur). Here we demonstrate that unregulated expression of isdI and isdG within S...
February 1, 2018: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29408859/transcriptome-analysis-revealed-the-possible-regulatory-pathways-initiating-female-geese-broodiness-within-the-hypothalamic-pituitary-gonadal-axis
#20
Hehe Liu, Jiwen Wang, Liang Li, Chunchun Han, Hua He, Hengyong Xu
Geese have the strongest tendency toward broodiness among all poultry. The mechanisms initiating broodiness within the goose hypothalamic-pituitary-gonadal axis (HPGA) are still unclear. Here, we reported the transcriptome differences between laying and initial nesting within the HPGA tissues of geese. We constructed a unigene database based on HPGA tissues and identified 128,148 unigenes, 100% of which have been annotated. By using Digital Gene Expression (DGE) sequencing, we screened 19, 110, 289, and 211 differentially expressed genes (DEGs) in the hypothalamus, pituitary gland, stroma ovarii, and follicles, respectively, between laying and nesting geese...
2018: PloS One
keyword
keyword
29731
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"