keyword
MENU ▼
Read by QxMD icon Read
search

Biliverdin

keyword
https://www.readbyqxmd.com/read/28421060/the-heme-metabolite-carbon-monoxide-facilitates-kshv-infection-by-inhibiting-tlr4-signaling-in-endothelial-cells
#1
Sara Botto, Jean K Gustin, Ashlee V Moses
Kaposi sarcoma herpesvirus (KSHV) is the etiologic agent of Kaposi sarcoma (KS) and certain rare B cell lymphoproliferative disorders. KSHV infection of endothelial cells (EC) in vitro increases expression of the inducible host-encoded enzyme heme oxygenase-1 (HO-1), which is also strongly expressed in KS tumors. HO-1 catalyzes the rate-limiting step in the conversion of heme into iron, biliverdin and the gasotransmitter carbon monoxide (CO), all of which share anti-apoptotic, anti-inflammatory, pro-survival, and tumorigenic activities...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28412905/therapeutic-potential-of-heme-oxygenase-1-carbon-monoxide-system-against-ischemia-reperfusion-injury
#2
Yuanyuan Cheng, Jianhui Rong
BACKGROUND: Ischemia-reperfusion (I/R) injury causes the dysfunctions of different major organs, leading to morbidity and mortality on the global scale. Among a battery of therapeutic targets, the heme oxygenase-1 (HO-1)/carbon monoxide (CO) system has been evaluated for the development of new therapies against I/R injury. The enzyme HO-1 catalyzes the degradation of heme into three biologically active end products, namely biliverdin/bilirubin, CO and ferrous ion. Interestingly, CO is one of a few bioactive gaseous molecules with the capability of regulating inflammation, cell survival and growth...
April 13, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28412296/impact-of-higher-order-heme-degradation-products-on-hepatic-function-and-hemodynamics
#3
Raphael A Seidel, Thierry Claudel, Franziska A Schleser, Navin K Ojha, Matthias Westerhausen, Sandor Nietzsche, Christoph Sponholz, Frans Cuperus, Sina M Coldewey, Stefan H Heinemann, Georg Pohnert, Michael Trauner, Michael Bauer
BACKGROUND& AIMS: While, traditionally, biliverdin and bilirubin are considered end products of heme catabolism, there is evidence for further degradation to diverse bioactive products. As such, Z-BOX A and Z-BOX B arise upon oxidation with unknown implications for hepatocellular function and integrity. We studied the impact of Z-BOX A and B on hepatic functions and explored their alterations in health and cholestatic conditions. METHODS: Functional implications and mechanisms were investigated in rats, hepatocytic HepG2 and HepaRG cells, human immortalized hepatocytes, and isolated perfused livers...
April 12, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28401765/near-infrared-fluorescent-proteins-biosensors-and-optogenetic-tools-engineered-from-phytochromes
#4
Konstantin G Chernov, Taras A Redchuk, Evgeniya S Omelina, Vladislav V Verkhusha
Phytochrome photoreceptors absorb far-red and near-infrared (NIR) light and regulate light responses in plants, fungi, and bacteria. Their multidomain structure and autocatalytic incorporation of linear tetrapyrrole chromophores make phytochromes attractive molecular templates for the development of light-sensing probes. A subclass of bacterial phytochromes (BphPs) utilizes heme-derived biliverdin tetrapyrrole, which is ubiquitous in mammalian tissues, as a chromophore. Because biliverdin possesses the largest electron-conjugated chromophore system among linear tetrapyrroles, BphPs exhibit the most NIR-shifted spectra that reside within the NIR tissue transparency window...
April 12, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28389660/characteristics-of-the-heme-catabolic-pathway-in-mild-unconjugated-hyperbilirubinemia-and-their-associations-with-inflammation-and-disease-prevention
#5
Christine Mölzer, Marlies Wallner, Carina Kern, Anela Tosevska, René Zadnikar, Daniel Doberer, Rodrig Marculescu, Karl-Heinz Wagner
Heme catabolism exerts physiological functions that impact health through depressing inflammation. Upon reactive pathway progression, as in Gilbert's Syndrome (GS; UGT1A1*28 polymorphism), aggravated health effects have been determined. Based on lower inflammation and improved metabolic health reported for GS, inter-group differences in heme catabolism were explored. Therefore, a case-control study including 120 fasted, healthy, age- and gender matched subjects with/without GS, was conducted. Genetic expressions of HMOX-1 and BLVRA were measured...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28385652/hmus-from-yersinia-pseudotuberculosis-is-a-non-canonical-heme-degrading-enzyme-to-acquire-iron-from-heme
#6
Masato Onzuka, Yukari Sekine, Takeshi Uchida, Koichiro Ishimori, Shin-Ichi Ozaki
Some Gram-negative pathogens import host heme into the cytoplasm and utilize it as an iron source for their survival. We report here that HmuS, encoded by the heme utilizing system (hmu) locus, cleaves the protoporphyrin ring to release iron from heme. A liquid chromatography/mass spectrometry analysis revealed that the degradation products of this reaction are two biliverdin isomers that result from transformation of a verdoheme intermediate. This oxidative heme degradation by HmuS required molecular oxygen and electrons supplied by either ascorbate or NADPH...
April 3, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28380331/near-infrared-fluorescent-protein-irfp713-as-a-reporter-protein-for-optogenetic-vectors-a-transgenic-cre-reporter-rat-and-other-neuronal-studies
#7
Christopher T Richie, Leslie R Whitaker, Keith W Whitaker, Julie Necarsulmer, Heather A Baldwin, Yajun Zhang, Lowella Fortuno, Josh J Hinkle, Pyry Koivula, Mark J Henderson, Wenzhi Sun, Kai Wang, Jeffrey C Smith, Jim Pickel, Na Ji, Bruce T Hope, Brandon K Harvey
BACKGROUND: The use of genetically-encoded fluorescent reporters is essential for the identification and observation of cells that express transgenic modulatory proteins. Near-infrared (NIR) fluorescent proteins have superior light penetration through biological tissue, but are not yet widely adopted. NEW METHOD: Using the near-infrared fluorescent protein, iRFP713, improves the imaging resolution in thick tissue sections or the intact brain due to the reduced light-scattering at the longer, NIR wavelengths used to image the protein...
April 2, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28347842/potential-role-of-heme-metabolism-in-the-inducible-expression-of-heme-oxygenase-1
#8
Aka-Aki Takeda, Machiko Sasai, Yuka Adachi, Keiko Ohnishi, Jun-Ichi Fujisawa, Shingo Izawa, Shigeru Taketani
BACKGROUND: The degradation of heme significantly contributes to cytoprotective effects against oxidative stress and inflammation. The enzyme heme oxygenase-1 (HO-1), involved in the degradation of heme, forms carbon monoxide (CO), ferrous iron, and bilirubin in conjunction with biliverdin reductase, and is induced by various stimuli including oxidative stress and heavy metals. We examined the involvement of heme metabolism in the induction of HO-1 by the inducers sulforaphane and sodium arsenite...
March 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28345551/biliverdin-protects-the-isolated-rat-lungs-from-ischemia-reperfusion-injury-via-antioxidative-anti-inflammatory-and-anti-apoptotic-effects
#9
Wen-Fang Tian, Ping Weng, Qiong Sheng, Jun-Liang Chen, Peng Zhang, Ji-Ru Zhang, Bin Du, Min-Chen Wu, Qing-Feng Pang, Jian-Jun Chu
BACKGROUND: Biliverdin (BV) has a protective role against ischemia-reperfusion injury (IRI). However, the protective role and potential mechanisms of BV on lung IRI (LIRI) remain to be elucidated. Thus, we aimed to investigate the protective role and potential mechanisms of BV on LIRI. METHODS: Lungs were isolated from Sprague-Dawley rats to establish an ex vivo LIRI model. After an initial 15 min stabilization period, the isolated lungs were subjected to ischemia for 60 min, followed by 90 min of reperfusion with or without BV treatment...
April 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28343921/cell-growth-of-immortalized-arachnoid-cells-in-the-presence-of-fibroblasts-and-blood-products
#10
Catherine A Miller, Eric A Hansen, Cornelius H Lam
OBJECT: The pathophysiology of non-obstructive hydrocephalus involves alteration in cerebrospinal fluid (CSF) pathways. The exact mechanism is unknown, but as arachnoid CSF egress is a major route of CSF removal, damage or alteration to the growth of arachnoid cells may influence the rate of CSF absorption. We investigated the effect of soluble factors secreted by fibroblasts and the presence of blood products on arachnoid cell growth. METHODS: An immortalized arachnoid cell line was developed and cells were grown on semipermeable membranes in a culture chamber...
March 23, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28335416/supplementation-with-phycocyanobilin-citrulline-taurine-and-supranutritional-doses-of-folic-acid-and-biotin-potential-for-preventing-or-slowing-the-progression-of-diabetic-complications
#11
Mark F McCarty
Oxidative stress, the resulting uncoupling of endothelial nitric oxide synthase (eNOS), and loss of nitric oxide (NO) bioactivity, are key mediators of the vascular and microvascular complications of diabetes. Much of this oxidative stress arises from up-regulated nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity. Phycocyanobilin (PhyCB), the light-harvesting chromophore in edible cyanobacteria such as spirulina, is a biliverdin derivative that shares the ability of free bilirubin to inhibit certain isoforms of NADPH oxidase...
March 14, 2017: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/28285405/the-effects-of-blood-and-blood-products-on-the-arachnoid-cell
#12
Eric A Hansen, Liudmila Romanova, Christopher Janson, Cornelius H Lam
After traumatic brain injury (TBI), large amounts of red blood cells and hemolytic products are deposited intracranially creating debris in the cerebrospinal fluid (CSF). This debris, which includes heme and bilirubin, is cleared via the arachnoid granulations and lymphatic systems. However, the mechanisms by which erythrocytes and their breakdown products interfere with normal CSF dynamics remain poorly defined. The purpose of this study was to model in vitro how blood breakdown products affect arachnoid cells at the CSF-blood barrier, and the extent to which the resorption of CSF into the venous drainage system is mechanically impaired following TBI...
March 11, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28257621/the-heme-oxygenase-system-in-hematological-malignancies
#13
Giovanni Li Volti, Daniele Tibullo, Luca Vanella, Cesarina Giallongo, Francesco Di Raimondo, Stefano Forte, Michelino Di Rosa, Salvatore S Signorelli, Ignazio Barbagallo
SIGNIFICANCE: Several lines of evidence suggest that hematological malignancies exhibit an altered redox balance homeostasis that can lead to the activation of various survival pathways that, in turn, lead to the progression of disease and chemoresistance. Among these pathways, the heme oxygenase-1 (HO-1) pathway is likely to play a major role. HO is an enzyme that catalyzes regio-selective, oxidative degradation of heme with the simultaneous release of carbon monoxide (CO), ferrous iron (Fe2+), and biliverdin, which is reduced to bilirubin by biliverdin reductase...
March 3, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28219651/ho1-and-wnt-expression-is-independently-regulated-in-female-mice-brains-following-permanent-ischemic-brain-injury
#14
Jatin Tulsulkar, Alicia Ward, Zahoor A Shah
A gender difference in stroke is observed throughout epidemiologic studies, pathophysiology, treatment and outcomes. We investigated the neuroprotective role of hemeoxygenase (HO) enzyme, which catabolizes free heme to bilirubin, carbon monoxide and biliverdin in the female brain after permanent ischemia. We have previously reported in male mice that genetic deletion of HO1 exacerbates the brain damage after permanent ischemia, and the mechanism of neuroprotection is dependent on the HO1/Wnt pathway; however, the role of HO1/Wnt mediated neuroprotection in the female brain is yet to be investigated...
May 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28206992/heme-oxygenase-1-promoter-polymorphisms-do-they-modulate-neonatal-hyperbilirubinemia
#15
M Kaplan, R J Wong, D K Stevenson
The role of genetic factors in the modulation of serum bilirubin levels and the pathophysiology of neonatal hyperbilirubinemia is being increasingly recognized. Heme oxygenase-1 (HO-1) is the rate-limiting enzyme by which heme is catabolized to biliverdin and thence to bilirubin, with the simultaneous release of equimolar quantities of ferrous iron (Fe(3+)) and carbon monoxide. Polymorphisms of the HO-1 gene promoter may modulate transcriptional activity, thereby augmenting or attenuating HO-1 expression with resultant modulation of the production of bilirubin...
February 16, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28198575/tat-biliverdin-reductase-a-protects-ins-1-cells-from-human-islet-amyloid-polypeptide-induced-cytotoxicity-by-alleviating-oxidative-stress-and-er-stress
#16
Su Jin Lee, Hyung Kyung Kang, Won Sik Eum, Jinseu Park, Soo Young Choi, Hyeok Yil Kwon
Human islet amyloid polypeptide (hIAPP), a major constituent of islet amyloid deposits, induces pancreatic β-cell apoptosis and eventually contributes to β-cell deficit in patients with type 2 diabetes mellitus (T2DM). In this study, Tat-mediated transduction of biliverdin reductase A (BLVRA) was investigated in INS-1 cells to examine whether exogenous supplementation of BLVRA prevented hIAPP-induced apoptosis and dysfunction in insulin secretion in β-cells. Tat-BLVRA fusion protein was efficiently delivered into INS-1 cells in a time- and dose-dependent manner...
May 2017: Cell Biology International
https://www.readbyqxmd.com/read/28186648/the-recipient-s-heme-oxygenase-1-promoter-region-polymorphism-is-associated-with-cardiac-allograft-vasculopathy
#17
Kathrin Freystaetter, Martin Andreas, Martin Bilban, Thomas Perkmann, Alexandra Kaider, Marco Masetti, Alfred Kocher, Michael Wolzt, Andreas Zuckermann
Heme oxygenase-1 (HO-1) catalyses the degradation of heme to biliverdin, free iron, and carbon monoxide. The promoter region contains a highly polymorphic (GT)n repeat, where shorter (GT)n repeat sequences are linked to higher transcriptional activity, which was shown to correlate with a cytoprotective effect. Higher HO-1 levels may protect from cardiac allograft vasculopathy. Cardiac allograft recipients transplanted between 1988 and 2012 were analyzed for the HO-1 (GT)n repeat polymorphism using PCR and DNA fragment analysis with capillary electrophoresis...
February 10, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28175984/three-bilindione-isomers-synthesis-characterization-and-reactivity-of-biliverdin-analogs
#18
Jun-Fei Wang, Fang Ma, Hao-Ling Sun, Jing Zhang, Jun-Long Zhang
Linear tetrapyrrole is the core structure of light-sensitive native cofactors such as phycocyanobilin, phytochromobilin and bile pigments, which attracts increasing attention in biomimetic chemistry, photochemistry and coordination chemistry. To decipher the relationship between structures and functions, in this work, we firstly reported the synthesis, isolation and characterization of three bilindione isomers (ZZZ, syn, syn, syn 1, EZE, syn, syn, anti 2 and EZE, anti, syn, anti 3) bearing meso-pentafluorophenyl groups...
February 7, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28169272/a-substrate-bound-structure-of-cyanobacterial-biliverdin-reductase-identifies-stacked-substrates-as-critical-for-activity
#19
Haruna Takao, Kei Hirabayashi, Yuki Nishigaya, Haruna Kouriki, Tetsuko Nakaniwa, Yoshinori Hagiwara, Jiro Harada, Hideaki Sato, Toshimasa Yamazaki, Yoichi Sakakibara, Masahito Suiko, Yujiro Asada, Yasuhiro Takahashi, Ken Yamamoto, Keiichi Fukuyama, Masakazu Sugishima, Kei Wada
Biliverdin reductase catalyses the last step in haem degradation and produces the major lipophilic antioxidant bilirubin via reduction of biliverdin, using NAD(P)H as a cofactor. Despite the importance of biliverdin reductase in maintaining the redox balance, the molecular details of the reaction it catalyses remain unknown. Here we present the crystal structure of biliverdin reductase in complex with biliverdin and NADP(+). Unexpectedly, two biliverdin molecules, which we designated the proximal and distal biliverdins, bind with stacked geometry in the active site...
February 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28168030/eggshell-coloration-and-its-importance-in-postmating-sexual-selection
#20
Miroslav Poláček, Matteo Griggio, Ivan Mikšík, Michaela Bartíková, Manfred Eckenfellner, Herbert Hoi
Avian eggshell color seems to fulfill multiple functions, some of them being structural and others signaling. In this study, we tested whether or not eggshell coloration may play a role in sexual selection of Tree Sparrows (Passer montanus). According to the "Sexually selected eggshell coloration" hypothesis, eggshell coloration signals female, egg or chick quality and males adjust parental investment according to this signal. Eggs of this species are covered with brown spots and patches, and variation between clutches is high...
February 2017: Ecology and Evolution
keyword
keyword
86327
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"