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Oxidized hemoglobin

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https://www.readbyqxmd.com/read/28632164/the-role-of-hemoproteins-hemoglobin-myoglobin-and-neuroglobin-in-endogenous-thiosulfate-production-processes
#1
REVIEW
Anna Bilska-Wilkosz, Małgorzata Iciek, Magdalena Górny, Danuta Kowalczyk-Pachel
Thiosulfate formation and biodegradation processes link aerobic and anaerobic metabolism of cysteine. In these reactions, sulfite formed from thiosulfate is oxidized to sulfate while hydrogen sulfide is transformed into thiosulfate. These processes occurring mostly in mitochondria are described as a canonical hydrogen sulfide oxidation pathway. In this review, we discuss the current state of knowledge on the interactions between hydrogen sulfide and hemoglobin, myoglobin and neuroglobin and postulate that thiosulfate is a metabolically important product of this processes...
June 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28628802/metabolic-control-and-periodontal-treatment-decreases-elevated-oxidative-stress-in-the-early-phases-of-type-1-diabetes-onset
#2
Cüneyt A Aral, Özlem Nalbantoğlu, Bilge G Nur, Mustafa Altunsoy, Kübra Aral
OBJECTIVE: Recently, increasing concern has been focused on the contribution of oxidative stress in the pathology of periodontal disease and diabetes mellitus. Firstly, the present study aimed to analyze gingival crevicular fluid (GCF), salivary, and serum oxidative status in children with type 1 diabetes mellitus (T1DM) at diagnosis and systemically healthy children with and without gingivitis. Additionally, the diabetic patients were reevaluated after diabetes and periodontal treatment...
June 12, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28627837/natural-antioxidant-vitamins-status-in-pregnancies-complicated-with-intrauterine-growth-restriction
#3
Amita K Gadhok, Tarun K Sharma, Maheep Sinha, Rakesh Khunteta, Satish K Vardey, Poonam Sahni, Manisha Sankhla
BACKGROUND: The weight of the infant at birth is a powerful predictor of infant growth and survival and is dependent on maternal health and nutrition during pregnancy. Pregnant women have a defense mechanism against increased oxidative stress composed of antioxidant enzymes and natural antioxidant vitamins like vitamin C and E. Therefore, we evaluated whether differences exist in serum levels of vitamin C and E in pregnant women complicated with intrauterine growth restriction (IUGR)...
May 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28624483/biomarker-profiles-of-acute%C3%A2-heart%C3%A2-failure%C3%A2-patients-with-a%C3%A2-mid-range-ejection%C3%A2-fraction
#4
Jasper Tromp, Mohsin A F Khan, Robert J Mentz, Christopher M O'Connor, Marco Metra, Howard C Dittrich, Piotr Ponikowski, John R Teerlink, Gad Cotter, Beth Davison, John G F Cleland, Michael M Givertz, Daniel M Bloomfield, Dirk J van Veldhuisen, Hans L Hillege, Adriaan A Voors, Peter van der Meer
OBJECTIVES: In this study, the authors used biomarker profiles to characterize differences between patients with acute heart failure with a midrange ejection fraction (HFmrEF) and compare them with patients with a reduced (heart failure with a reduced ejection fraction [HFrEF]) and preserved (heart failure with a preserved ejection fraction [HFpEF]) ejection fraction. BACKGROUND: Limited data are available on biomarker profiles in acute HFmrEF. METHODS: A panel of 37 biomarkers from different pathophysiological domains (e...
May 31, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28622911/demyelination-strokes-and-eculizumab-lessons-from-the-congenital-cd59-gene-mutations
#5
Adi Tabib, Netanel Karbian, Dror Mevorach
Neurological symptoms of patients with p.Cys89Tyr mutation in the CD59 gene include recurrent peripheral neuropathy resembling Guillain-Barré syndrome, characterized by sensory-motor demyelinating neuropathy with secondary axonal damage and moderate enhancement of the nerve roots on spine MRI, together with recurrent strokes and retinal involvement. Three additional mutations in CD59, leading to loss of function, have been described, and overall, 12/12 (100%) of patients with any mutation presented with neurological symptoms; 11/12 (92%) patients presented with recurrent peripheral neuropathy, 6/12 (50%) with recurrent strokes, and 1/12 (8%) with retinal involvement...
June 13, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28622709/spirulina-platensis-prevents-hyperglycemia-in-rats-by-modulating-gluconeogenesis-and-apoptosis-via-modification-of-oxidative-stress-and-mapk-pathways
#6
Kadry M Sadek, Mohamed A Lebda, Sherif M Nasr, Moustafa Shoukry
Spirulina platensis (SP) is a microalga with antioxidant, antidiabetic and anti-inflammatory properties. The present study explored the ability and potential mechanism(s) by which SP induced glucose lowering impact in diabetic rat model. Forty rats were allocated into four groups: control; streptozotocin (STZ)-induced diabetes (STZ, 45mg/kg b.w., intraperitoneally); SP (500mg/kg b.w., orally twice weekly for 2 months) and STZ-induced diabetes+SP group. In the STZ-induced diabetic rats, SP significantly decreased (P>0...
June 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28618722/antioxidants-status-in-type-2-diabetic-patients-in-morocco
#7
Rachid Eljaoudi, Naoual Elomri, Meryem Laamarti, Yahia Cherrah, Taoufik Amezyane, Driss Ghafir, Azeddine Ibrahimi
BACKGROUND/AIM: Type 2 diabetes is a heterogeneous and multifactorial metabolic disorder with some relationship to oxidative stress (OS). Since no studies were conducted in the Moroccan population, this clinical investigation aimed at evaluating the antioxidants status in Moroccan patients with type 2 diabetes. MATERIALS AND METHODS: Blood samples of 60 type 2 diabetic patients and 40 healthy controls subjects were analyzed for determination of glycemia, hemoglobin, CRP, glycated hemoglobin, lipid parameters, malondialdehyde (MDA), vitamins E and C, copper (Cu), zinc (Zn), and selenium (Se)...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28611442/competing-factors-link-to-bone-health-in-polycystic-ovary-syndrome-chronic-low-grade-inflammation-takes-a-toll
#8
Shirin Kalyan, Millan S Patel, Elaine Kingwell, Hélène C F Côté, Danmei Liu, Jerilynn C Prior
Chronic inflammation predisposes to poor bone health. Women with polycystic ovary syndrome (PCOS) experience androgen excess, ovulatory disturbances, insulin resistance, abdominal adiposity and chronic inflammation. Our objective was to investigate the relationships among bone health parameters, chronic subclinical inflammation and anthropometric measures in premenopausal women with and without PCOS. In 61 premenopausal women, 22 women with PCOS and 39 controls, we assessed bone parameters (total hip bone mineral density [BMD] by dual-energy X-ray absorptiometry and radius strength-strain index [SSI] by peripheral quantitative computed tomography), inflammation (C-reactive protein/albumin), oxidative stress (leukocyte telomere length, urinary 8-hydroxydeoxyguanosine); hemoglobin A1c; anthropometric measures (body mass index, waist-to-height ratio, cross-sectional muscle area)...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607132/impaired-muscle-oxygenation-and-elevated-exercise-blood-pressure-in-hypertensive-patients-links-with-vascular-stiffness
#9
Konstantina Dipla, Areti Triantafyllou, Nikolaos Koletsos, Stavros Papadopoulos, Vasileios Sachpekidis, Ioannis S Vrabas, Eugenia Gkaliagkousi, Andreas Zafeiridis, Stella Douma
This study examined in vivo (1) skeletal muscle oxygenation and microvascular function, at rest and during handgrip exercise, and (2) their association with macrovascular function and exercise blood pressure (BP), in newly diagnosed, never-treated patients with hypertension and normotensive individuals. Ninety-one individuals (51 hypertensives and 40 normotensives) underwent office and 24-hour ambulatory BP, arterial stiffness, and central aortic BP assessment, followed by a 5-minute arterial occlusion and a 3-minute submaximal handgrip exercise...
June 12, 2017: Hypertension
https://www.readbyqxmd.com/read/28606854/divergent-roles-of-the-drosophila-melanogaster-globins
#10
Thorsten Burmester, Agnes Wawrowski, Ines Diepenbruck, Katharina Schrick, Nina Seiwert, Fabian Ripp, Andreas Prothmann, Thomas Hankeln
In contrast to long-held assumptions, the gene repertoire of most insects includes hemoglobins. Analyses of the genome of the fruitfly Drosophila melanogaster identified three distinct hemoglobin genes (glob1, glob2, and glob3). While glob1 is predominantly associated with the tracheal system and fat body, glob2 and glob3 are almost exclusively expressed in the testis. The physiological role of globins in Drosophila is uncertain. Here, we studied the functions of the three globins in a cell culture system. Drosophila Schneider 2 (S2) cells were stably transfected with each of the three globins and the empty vector as control...
June 9, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28601011/developmental-toxicity-of-hydroxylated-chrysene-metabolites-in-zebrafish-embryos
#11
Graciel Diamante, Gabrielle do Amaral E Silva Müller, Norma Menjivar-Cervantes, Elvis Genbo Xu, David C Volz, Afonso Celso Dias Bainy, Daniel Schlenk
One of the primary sources of polycyclic aromatic hydrocarbons (PAHs) in marine environments is oil. Photochemical oxidation and microbial transformation of PAH-containing oils can result in the formation of oxygenated products. Among the PAHs in crude oil, chrysene is one of the most persistent within the water column and may be transformed to 2- and 6-hydroxychrysene (OHCHR). Both of these compounds have been shown to activate (2-OHCHR) and antagonize (6-OHCHR) the estrogen receptor (ER). Previous studies in our lab have shown that estrogen can significantly alter zebrafish development...
June 3, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28600527/a-possible-pathogenetic-factor-of-sickle-cell-disease-based-on-fluorescent-analysis-via-an-optofluidic-resonator
#12
Hailang Dai, Cheng Yin, Xiaona Ye, Bei Jiang, Maowu Ran, Zhuangqi Cao, Xianfeng Chen
Waveguide based optofluidic resonator features high precision and high sensitivity in real-time fluorescent analysis. We present a novel optofluidic resonator following the hollow-core metal-cladding waveguide structure, which is then used to record the real-time binding process of Fe(2+) and Fe(3+) with protoporphyrin IX (PpIX) in PBS solution, respectively. The central fluorescent wavelength of compound with Fe(2+) is in good accordance with that of the normal hemoglobin, whilst the peaks of the Fe(3+) compound match the hemoglobin specimen from sickle-cell disease (SCD) patients...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28600471/asymmetric-dimethylarginine-contributes-to-the-impaired-response-to-erythropoietin-in-ckd-anemia
#13
Miyuki Yokoro, Yosuke Nakayama, Sho-Ichi Yamagishi, Ryotaro Ando, Miki Sugiyama, Sakuya Ito, Junko Yano, Kensei Taguchi, Yusuke Kaida, Daisuke Saigusa, Masumi Kimoto, Takaaki Abe, Seiji Ueda, Kei Fukami
Erythropoietin-resistant anemia is associated with adverse cardiovascular events in patients with ESRD, but the underlying mechanism remains unclear. Here, we evaluated the role of the endogenous nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA). In 54 patients with advanced CKD, erythrocyte but not plasma ADMA levels independently associated with low hemoglobin values, although levels of both types of ADMA were elevated compared with those in healthy volunteers. Furthermore, erythrocyte ADMA level associated with the erythropoietin resistance index in patients receiving a weekly injected dose of erythropoiesis-stimulating agents standardized for hemoglobin levels and body weight, whereas it correlated with the erythropoietin demand index (plasma erythropoietin units divided by the hemoglobin value) in patients not receiving erythropoiesis-stimulating agents...
June 9, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28597450/effect-of-visible-light-on-vasospasticity-of-post-subarachnoid-hemorrhage-cerebrospinal-fluid
#14
Pulat Akin Sabanci, Bulent Omay, Yavuz Aras, Aydın Aydoseli, Achmet Ali, Tulin Erdem, Altay Sencer, Talat Kiris
Background and Objective Cerebral vasospasm (CV) is a serious complication of subarachnoid hemorrhage (SAH) with high morbidity and mortality rates. The mechanism of CV has not been determined. There are many theories related to this unsolved issue, one of which supports CV as a two-stage phenomenon from a pathophysiologic perspective. The first stage consists of inhibition of neuronal nitric oxide synthase by oxyhemoglobin, which results in a decrease of nitric oxide (NO) production. The second stage consists of an increase in the levels of asymmetric dimethylarginine through bilirubin oxidation products (BOXes), which are oxidized by-products of hemoglobin metabolism...
June 8, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28596511/effect-of-alprazolam-on-redox-status-in-renal-transplantation-donors-and-recipients
#15
Meltem Güner Can, Özgen Ilgaz Koçyiğit, Uğur Aksu, Ali Özer, Fevzi Toraman
BACKGROUND Benzodiazepines are the most popular premedication drugs thought to act through the GABA/benzodiazepine receptor complex and alprazolam is one of the most potent benzodiazepines that have a quick onset. While there is a growing body of evidence supporting alprazolam in the amelioration of redox status in animals, no study has been performed concerning its antioxidant activity in humans. The purpose of this investigation was to determine the effect of alprazolam on redox status. MATERIAL AND METHODS This study was a four-group randomized controlled trial...
June 9, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28593024/cardiovascular-mitochondrial-dysfunction-induced-by-cocaine-biomarkers-and-possible-beneficial-effects-of-modulators-of-oxidative-stress
#16
REVIEW
Manuela Graziani, Paolo Sarti, Marzia Arese, Maria Chiara Magnifico, Aldo Badiani, Luciano Saso
Cocaine abuse has long been known to cause morbidity and mortality due to its cardiovascular toxic effects. The pathogenesis of the cardiovascular toxicity of cocaine use has been largely reviewed, and the most recent data indicate a fundamental role of oxidative stress in cocaine-induced cardiovascular toxicity, indicating that mitochondrial dysfunction is involved in the mechanisms of oxidative stress. The comprehension of the mechanisms involving mitochondrial dysfunction could help in selecting the most appropriate mitochondria injury biological marker, such as superoxide dismutase-2 activity and glutathionylated hemoglobin...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28589103/effect-of-symbiotic-supplementation-on-glycemic-control-lipid-profiles-and-microalbuminuria-in-patients-with-non-obese-type-2-diabetes-a-randomized-double-blind-clinical-trial
#17
Zarin Sadat Ebrahimi, Ensieh Nasli-Esfahani, Azadeh Nadjarzade, Hassan Mozaffari-Khosravi
BACKGROUND: The prevalent raise of type 2 diabetes (T2D) around the globe, are creating higher risk for cardiovascular diseases (CVDs) and increasing strain on each country's health care budget in the world. Microalbuminuria has appeared as a key parameter in diabetic patients. Microalbuminuria is also related to increased cardiovascular morbidity in people who are non-obese diabetic. Some studies have suggested that consumption of symbiotic foods might help improve the metabolic profile, inflammatory factors and biomarkers of oxidative stress...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28585439/gch1-plays-a-role-in-the-high-altitude-adaptation-of-tibetans
#18
Yong-Bo Guo, Yao-Xi He, Chao-Ying Cui, Luobu Ouzhu, Kangzhuo Baima, Zhuoma Duoji, Quzong Deji, Ba Bian, Yi Peng, Cai-Juan Bai, Lanzi Gongga, Yong-Yue Pan, la Qu, Min Kang, Yangji Ciren, Yangji Baima, Wei Guo, la Yang, Hui Zhang, Xiao-Ming Zhang, Wang-Shan Zheng, Shu-Hua Xu, Hua Chen, Sheng-Guo Zhao, Yuan Cai, Shi-Ming Liu, Tian-Yi Wu, Xue-Bin Qi, Bing Su
Tibetans are well adapted to high-altitude hypoxia. Previous genome-wide scans have reported many candidate genes for this adaptation, but only a few have been studied. Here we report on a hypoxia gene ( GCH1, GTP-cyclohydrolase I), involved in maintaining nitric oxide synthetase (NOS) function and normal blood pressure, that harbors many potentially adaptive variants in Tibetans. We resequenced an 80.8 kb fragment covering the entire gene region of GCH1 in 50 unrelated Tibetans. Combined with previously published data, we demonstrated many GCH1 variants showing deep divergence between highlander Tibetans and lowlander Han Chinese...
May 18, 2017: Zoological Research
https://www.readbyqxmd.com/read/28584737/study-of-lipid-peroxidation-nitric-oxide-end-product-and-trace-element-status-in-type-2-diabetes-mellitus-with-and-without-complications
#19
Sanjukta Mishra, Bana Bihari Mishra
BACKGROUND: Oxidative stress has become a real entity in etiopathogenesis of Type 2 diabetes mellitus (DM). It may result from steady flux of free radicals and lipid peroxides in vivo. Malondialdehyde (MDA) is a stable end product of lipid peroxidation. Accumulative evidences suggest that hyperglycemia in Type 2 DM can produce major changes in nitric oxide (NO) production as well as in its action. Alteration in metabolism of trace elements is also observed in DM. OBJECTIVE: To evaluate oxidative stress, status of NO, and trace elements zinc (Zn) and magnesium (Mg) in type 2 DM and to correlate these parameters with disease process...
April 2017: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/28584265/x-ray-structures-of-fructosyl-peptide-oxidases-revealing-residues-responsible-for-gating-oxygen-access-in-the-oxidative-half-reaction
#20
Tomohisa Shimasaki, Hiromi Yoshida, Shigehiro Kamitori, Koji Sode
Current enzymatic systems for quantifying glycated hemoglobin are based on the FAD-containing enzyme fructosyl peptide oxidase (FPOX). FPOX has substrate specificity for fructosyl-(α) N-valyl-histidine derived from proteolytic digestion of the N-terminus of the HbA1c β-chain. This study reports the X-ray structures of the wild-type and Asn56Ala (N56A) mutant of Phaeosphaeria nodorum fructosyl peptide oxidase (PnFPOX) to elucidate the residues responsible for the oxidative half-reaction. N56A showed decreased oxidase activity compared to the wild -type, while its dye-mediated dehydrogenase activity was higher than that of wild type...
June 5, 2017: Scientific Reports
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