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Oxidized hemoglobin

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https://www.readbyqxmd.com/read/28216053/hypoglycemic-drugs-induce-antioxidant-aldehyde-dehydrogenase-activity-and-remain-high-in-patients-with-glycemic-control-in-type-2-diabetes
#1
Alejandra Picazo, Angélica S Jiménez-Osorio, Porfirio Zúñiga-Mejía, José Pedraza-Chaverri, Adriana Monroy, M Eunice Rodríguez-Arellano, Diana Barrera-Oviedo
The antioxidant system results essential to control and prevent lipid peroxidation due to stress damage in type 2 diabetes. An example is aldehyde dehydrogenase (ALDH), an enzyme that is involved in the detoxification of aldehydes formed during lipid peroxidation. This study was conducted to evaluate ALDH activity and to determine their association with hypoglycemic treatment in type 2 diabetes patients. The study population consisted of 422 Mexican subjects: a control group and type 2 diabetes patients. Type 2 diabetes patients were re-classified as those with or without hypoglycemic treatment and those with or without glycemic control (according to glycated hemoglobin (HbA1c))...
February 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28213526/structural-and-mechanistic-insights-into-hemoglobin-catalyzed-hydrogen-sulfide-oxidation-and-the-fate-of-polysulfide-products
#2
Victor Vitvitsky, Pramod K Yadav, Sojin An, Javier Seravalli, Uhn-Soo Cho, Ruma Banerjee
Hydrogen sulfide is a cardioprotective signaling molecule but is toxic at elevated concentrations. Red blood cells can synthesize H2S but lacking organelles, cannot dispose off H2S via the mitochondrial sulfide oxidation pathway. We have recently shown that at high sulfide concentrations, ferric hemoglobin oxidizes H2S to a mixture of thiosulfate and iron-bound polysulfides in which the latter species predominates. Here, we report the crystal structure of human hemoglobin containing low-spin ferric sulfide, the first intermediate in heme-catalyzed sulfide oxidation...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28192241/molecular-cloning-mrna-expression-and-characterization-of-membrane-bound-hemoglobin-in-oriental-river-prawn-macrobrachium-nipponense
#3
Shengming Sun, Fujun Xuan, Hongtuo Fu, Jian Zhu, Xianping Ge, Xugan Wu
Most hemoglobins are respiratory proteins and are ubiquitous in animals, bacteria, fungi, protists, and plants. In this study, we describe a membrane-bound hemoglobin in the oriental river prawn Macrobrachium nipponense (MnHb), which also expresses hemocyanin. MnHb cDNA was cloned using the rapid amplification of cDNA ends (RACE) approach, which afforded a 1201bp gene encoding a 193 amino acid polypeptide. Bioinformatic evaluation suggested MnHb is membrane anchored by N-myristoylation, and immunofluorescence confirmed its location in the membrane of chief cells in the gill...
February 10, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28183818/normalization-of-hemoglobin-based-oxygen-carrier-201-induced-vasoconstriction-roles-of-nitric-oxide-scavenging-and-endothelin
#4
Yannick J Taverne, Daphne P M de Wijs-Meijler, Maaike Te Lintel Hekkert, Paula F Moon-Massat, Greg P Dubé, Dirk Jan Duncker, Daphne Merkus
BACKGROUND: Hemoglobin-based oxygen carrier (HBOC)-201 is a cell-free modified hemoglobin solution potentially facilitating oxygen uptake and delivery in cardiovascular disorders and hemorrhagic shock. Clinical use has been hampered by vasoconstriction in the systemic and pulmonary beds. Therefore we aimed to 1) determine the possibility of counteracting HBOC-201-induced pressor effects with adenosine (ADO), 2) assess the potential roles of nitric oxide (NO) scavenging, reactive oxygen species (ROS) and endothelin (ET) in mediating the observed vasoconstriction and 3) compare these effects in resting and exercising swine...
February 9, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28182094/hemoglobins-likely-function-as-peroxidase-in-blood-clam-tegillarca-granosa-hemocytes
#5
Sufang Wang, Xiaopei Yu, Zhihua Lin, Shunqin Zhang, Liangyi Xue, Qinggang Xue, Yongbo Bao
Hemoglobins are a group of respiratory proteins principally functioning in transport of oxygen and carbon dioxide in red blood cells of all vertebrates and some invertebrates. The blood clam T. granosa is one of the few invertebrates that have hemoglobin-containing red hemocytes. In the present research, the peroxidase activity of T. granosa hemoglobins (Tg-Hbs) was characterized and the associated mechanism of action was deciphered via structural comparison with other known peroxidases. We detected that purified Tg-Hbs catalyzed the oxidation of phenolic compounds in the presence of exogenous H2O2...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28178891/up-regulation-of-cerebral-cytochrome-c-oxidase-and-hemodynamics-by-transcranial-infrared-laser-stimulation-a-broadband-near-infrared-spectroscopy-study
#6
Xinlong Wang, Fenghua Tian, Divya D Reddy, Sahil S Nalawade, Douglas W Barrett, Francisco Gonzalez-Lima, Hanli Liu
Transcranial infrared laser stimulation (TILS) is a noninvasive form of brain photobiomulation. Cytochrome-c-oxidase (CCO), the terminal enzyme in the mitochondrial electron transport chain, is hypothesized to be the primary intracellular photoacceptor. We hypothesized that TILS up-regulates cerebral CCO and causes hemodynamic changes. We delivered 1064-nm laser stimulation to the forehead of healthy participants ( n = 11), while broadband near-infrared spectroscopy was utilized to acquire light reflectance from the TILS-treated cortical region before, during, and after TILS...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28164612/evaluation-of-the-in-vitro-interference-of-hemoglobin-lipids-and-bilirubin-on-the-measurement-of-plasma-advanced-oxidation-protein-products
#7
Lara P Cargnin, Bruna S Hausen, Etiane Tatsch, Manuela B Sangoi, Rafael N Moresco
BACKGROUND: The pre-analytical phase is the most vulnerable and contributes to the majority of errors in laboratory assays. Therefore, the aim of this study was to evaluate in vitro interference of hemoglobin, lipids, and bilirubin on measurement of plasma advanced oxidation protein products (AOPPs). METHODS: AOPPs were measured in a sample spiked with increasing concentrations of hemoglobin, Intralipid® 20% or bilirubin. Then, the relative deviation of the result from the nonspiked baseline value was calculated...
August 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164544/clinical-significance-of-red-blood-cell-distribution-width-and-inflammatory-factors-for-the-disease-activity-in-rheumatoid-arthritis
#8
Li Yunchun, Wang Yue, Fang Z Jun, Su Qizhu, Ding Liumei
BACKGROUND: To evaluate the significance of red blood cell distribution width (RDW) and other factors for the disease activity in rheumatoid arthritis (RA). METHODS: Each patient underwent clinical examination and blood sampling for assessment of serum high-sensitivity C-reactive protein (hs-CRP) levels, erythrocyte sedimentation rate (ESR), hemoglobin concentration (Hb), hematocrit (HCT), RDW, and other erythrocyte parameters (mean corpuscular volume [MCV], mean cell Hb [MCH], mean corpuscular Hb concentration [MCHC])...
December 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28160083/high-intensity-aerobic-interval-training-improves-aerobic-fitness-and-hba1c-among-persons-diagnosed-with-type-2-diabetes
#9
Eva Maria Støa, Sondre Meling, Lill-Katrin Nyhus, Glenn Strømstad, Karl Magnus Mangerud, Jan Helgerud, Solfrid Bratland-Sanda, Øyvind Støren
PURPOSE: It remains to be established how high-intensity aerobic interval training (HAIT) affects risk factors associated with type 2 diabetes (TD2). This study investigated effects of HAIT on maximal oxygen uptake (VO2max), glycated Hemoglobin type A1C (HbA1c), insulin resistance (IR), fat oxidation (FatOx), body weight (BW), percent body fat (%BF), lactate threshold (LT), blood pressure (BP), and blood lipid profile (BLP) among persons with T2D. Results were compared to the effects after a moderate-intensity training (MIT) program...
February 3, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28154266/the-serum-oxidative-anti-oxidative-stress-balance-becomes-dysregulated-in-patients-with-non-alcoholic-steatohepatitis-associated-with-hepatocellular-carcinoma
#10
Yasuyuki Shimomura, Akinobu Takaki, Nozomu Wada, Tetsuya Yasunaka, Fusao Ikeda, Takayuki Maruyama, Naofumi Tamaki, Daisuke Uchida, Hideki Onishi, Kenji Kuwaki, Shinichiro Nakamura, Kazuhiro Nouso, Yasuhiro Miyake, Kazuko Koike, Takaaki Tomofuji, Manabu Morita, Kazuhide Yamamoto, Hiroyuki Okada
Objective Oxidative stress is associated with the progression of chronic liver disease. Non-alcoholic fatty liver disease (NAFLD) is also an oxidative stress-related disease. However, the oxidative/anti-oxidative balance has not been fully characterized in NAFLD. The objective of the present study was to investigate the balance between oxidative stress and the anti-oxidative activity in NAFLD, including non-alcoholic steatohepatitis (NASH)-related hepatocellular carcinoma (HCC). Patients We recruited 69 patients with histologically proven NAFLD without HCC (NAFLD; n=58), and with NASH-related HCC (NASH-HCC; n=11)...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28152051/hemoglobin-induced-cell-trauma-indirectly-influences-endothelial-tlr9-activity-resulting-in-pulmonary-vascular-smooth-muscle-cell-activation
#11
Zoe Loomis, Paul Eigenberger, Katherine Redinius, Christina Lisk, Vijaya Karoor, Eva Nozik-Grayck, Scott K Ferguson, Kathryn Hassell, Rachelle Nuss, Kurt Stenmark, Paul Buehler, David C Irwin
It is now well established that both inherited and acquired forms of hemolytic disease can promote pulmonary vascular disease consequent of free hemoglobin (Hb) induced NO scavenging, elevations in reactive oxygen species and lipid peroxidation. It has recently been reported that oxidative stress can activate NFkB through a toll-like receptor 9 (TLR9) mediated pathway; further, TLR9 can be activated by either nuclear or mitochondrial DNA liberated by stress induced cellular trauma. We hypothesis that Hb induced lipid peroxidation and subsequent endothelial cell trauma is linked to TLR9 activation, resulting in IL-6 mediated pulmonary smooth muscle cell proliferation...
2017: PloS One
https://www.readbyqxmd.com/read/28151958/effects-of-acute-and-chronic-exercise-on-the-osmotic-stability-of-erythrocyte-membrane-of-competitive-swimmers
#12
Lara Ferreira Paraiso, Ana Flávia Mayrink Gonçalves-E-Oliveira, Lucas Moreira Cunha, Omar Pereira de Almeida Neto, Adriana Garcia Pacheco, Karinne Beatriz Gonçalves Araújo, Mário da Silva Garrote-Filho, Morun Bernardino Neto, Nilson Penha-Silva
This study aimed to evaluate the influence of acute and chronic exercise on erythrocyte membrane stability and various blood indices in a population consisting of five national-level male swimmers, over 18 weeks of training. The evaluations were made at the beginning and end of the 1st, 7th, 13th and 18th weeks, when volume and training intensity have changed. The effects manifested at the beginning of those weeks were considered due to chronic adaptations, while the effects observed at the end of the weeks were considered due to acute manifestations of the exercise load of that week...
2017: PloS One
https://www.readbyqxmd.com/read/28149928/evening-and-morning-alterations-in-obstructive-sleep-apnea-red-blood-cell-proteome
#13
Amélia Feliciano, Fátima Vaz, Cristina Valentim-Coelho, Vukosava M Torres, Rita Silva, Vesna Prosinecki, Bruno M Alexandre, Andreia Almeida, Catarina Almeida-Marques, Ana S Carvalho, Rune Matthiesen, Atul Malhotra, Paula Pinto, Cristina Bárbara, Deborah Penque
This article presents proteomics data referenced in [1] Using proteomics-based evaluation of red blood cells (RBCs), we have identified differentially abundant proteins associated with Obstructive Sleep Apnea Syndrome (OSA). RBCs were collected from peripheral blood of patients with moderate/severe OSA or snoring at pre- (evening) and post-night (morning) polysomnography, so that proteome variations between these time points could be assessed. RBC cytoplasmic fraction depleted of hemoglobin, using Hemovoid(™) system, were analyzed by two-dimensional fluorescence difference gel electrophoresis (2D-DIGE), the 2D image software-based analyzed and relevant differentially abundant proteins identified by mass spectrometry (MS)...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28141793/sex-specific-associations-between-cerebrovascular-blood-pressure-autoregulation-and-cardiopulmonary-injury-in-neonatal-encephalopathy-and-therapeutic-hypothermia
#14
Raul Chavez-Valdez, Matthew O'Connor, Jamie Perin, Michael Reyes, Jillian Armstrong, Charlamaine Parkinson, Maureen Gilmore, Jacky Jennings, Frances J Northington, Jennifer K Lee
BACKGROUND: Cardiopulmonary injury is common in neonatal encephalopathy, but the link with cerebrovascular dysfunction is unknown. We hypothesized that cerebral autoregulation is associated with cardiopulmonary injury in neonates treated with therapeutic hypothermia (TH) for neonatal encephalopathy. METHODS: The cerebral hemoglobin volume index (HVx) from near-infrared spectroscopy was used to identify the mean arterial blood pressure (MAP) with optimal autoregulatory vasoreactivity (MAPOPT)...
January 31, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28134855/low-coherence-interferometric-fiber-optic-sensors-with-potential-applications-as-biosensors
#15
Marzena Hirsch, Daria Majchrowicz, Paweł Wierzba, Matthieu Weber, Mikhael Bechelany, Małgorzata Jędrzejewska-Szczerska
Fiber-optic Fabry-Pérot interferometers (FPI) can be applied as optical sensors, and excellent measurement sensitivity can be obtained by fine-tuning the interferometer design. In this work, we evaluate the ability of selected dielectric thin films to optimize the reflectivity of the Fabry-Pérot cavity. The spectral reflectance and transmittance of dielectric films made of titanium dioxide (TiO₂) and aluminum oxide (Al₂O₃) with thicknesses from 30 to 220 nm have been evaluated numerically and compared...
January 28, 2017: Sensors
https://www.readbyqxmd.com/read/28130333/can-endothelial-hemoglobin-alpha-regulate-nitric-oxide-vasodilatory-signaling
#16
Jaimit Parikh, Adam Kapela, Nikolaos M Tsoukias
We utilized mathematical modeling to investigate nitric oxide (NO)-dependent vasodilatory signaling in the arteriolar wall. Detailed continuum cellular models of calcium (Ca(2+)) dynamics and membrane electrophysiology in smooth muscle (SMC) and endothelial cells (EC) were coupled with models of NO signaling and biotransport in an arteriole. We use this theoretical approach to examine the role of endothelial hemoglobin alpha (Hbα) as a modulator of NO-mediated myoendothelial feedback as previously suggested in Straub al...
January 27, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28116093/inhibition-of-sglt2-alleviates-diabetic-nephropathy-by-suppressing-high-glucose-induced-oxidative-stress-in-type-1-diabetic-mice
#17
Takashi Hatanaka, Daisuke Ogawa, Hiromi Tachibana, Jun Eguchi, Tatsuyuki Inoue, Hiroshi Yamada, Kohji Takei, Hirofumi Makino, Jun Wada
It is unclear whether the improvement in diabetic nephropathy by sodium glucose cotransporter 2 (SGLT2) inhibitors is caused by a direct effect on SGLT2 or by the improvement in hyperglycemia. Here, we investigated the effect of dapagliflozin on early-stage diabetic nephropathy using a mouse model of type 1 diabetes and murine proximal tubular epithelial cells. Eight-week-old Akita mice were treated with dapagliflozin or insulin for 12 weeks. Body weight, urinary albumin excretion, blood pressure, as well as levels of blood glucose and hemoglobin A1c were measured...
August 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28109837/interspecific-variation-and-plasticity-in-hemoglobin-nitrite-reductase-activity-and-its-correlation-with-oxygen-affinity-in-vertebrates
#18
Frank B Jensen, Rasmus A H Kolind, Natashia S Jensen, Gabriella Montesanti, Tobias Wang
Deoxygenated hemoglobin (Hb) is a nitrite reductase that reduces naturally occurring nitrite to nitric oxide (NO), supplying physiological relevant NO under hypoxic conditions. The nitrite reductase activity is modulated by the allosteric equilibrium between the R and T structures of Hb that also determines oxygen affinity. In the present study we investigated nitrite reductase activity and O2 affinity in Hbs from ten different vertebrate species under identical conditions to disclose interspecific variations and allow an extended test for a correlation between the rate constant for nitrite reduction and O2 affinity...
January 18, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28099525/polyethylene-glycol-camouflaged-earthworm-hemoglobin
#19
Vivek P Jani, Alborz Jelvani, Selamawit Moges, Parimala Nacharaju, Camille Roche, David Dantsker, Andre Palmer, Joel M Friedman, Pedro Cabrales
Nearly 21 million components of blood and whole blood and transfused annually in the United States, while on average only 13.6 million units of blood are donated. As the demand for Red Blood Cells (RBCs) continues to increase due to the aging population, this deficit will be more significant. Despite decades of research to develop hemoglobin (Hb) based oxygen (O2) carriers (HBOCs) as RBC substitutes, there are no products approved for clinical use. Lumbricus terrestris erythrocruorin (LtEc) is the large acellular O2 carrying protein complex found in the earthworm Lumbricus terrestris...
2017: PloS One
https://www.readbyqxmd.com/read/28095104/the-relative-efficacy-of-land-based-and-water-based-exercise-training-on-macro-and-micro-vascular-functions-in-older-patients-with-type-2-diabetes
#20
Saowaluck Suntraluck, Hirofumi Tanaka, Daroonwan Suksom
Microvascular and macrovascular dysfunction plays an important role in the pathogenesis of diabetic vascular disease. Twenty-nine older patients with type 2 diabetes were randomly assigned into the land-based (LB; n=14) or water-based (WB; n=15) groups. Both groups completed supervised aerobic cycling exercises 3 times per week for 12 weeks. The WB group performed cycling exercise training in warm water (36°C) immersed to the hip level. After 12 weeks, blood glucose concentration and insulin resistance did not change but hemoglobin A1c levels decreased (P<0...
January 17, 2017: Journal of Aging and Physical Activity
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