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Oxidized hemoglobin

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https://www.readbyqxmd.com/read/28746841/the-antidepressant-effect-of-melatonin-and-fluoxetine-in-diabetic-rats-is-associated-with-a-reduction-of-the-oxidative-stress-in-the-prefrontal-and-hippocampal-cortices
#1
Redouane Rebai, Luc Jasmin, Abdennacer Boudah
In the past few years possible mechanisms that link diabetes and depression have been found. One of these mechanisms is the increase in lipid peroxidation and decrease in antioxidant activity in the hippocampal and prefrontal cortices, which are brain areas involved in mood. The goal of the present study was to evaluate the effect of an antidepressant and of an antioxidant on behavior and oxidative activity in brains of diabetic rats. Rats rendered diabetic after a treatment with streptozotocin (STZ) (60mg/kg) were treated with fluoxetine (15mg/kg), melatonin (10mg/kg), or vehicle for 4 weeks...
July 23, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28744992/the-effect-of-12-weeks-carnosine-supplementation-on-renal-functional-integrity-and-oxidative-stress-in-pediatric-patients-with-diabetic-nephropathy-a-randomized-placebo-controlled-trial
#2
Nancy Samir Elbarbary, Eman Abdel Rahman Ismail, Abdel Rahman El-Naggar, Mahitab Hany Hamouda, Manal El-Hamamsy
BACKGROUND AND OBJECTIVES: Oxidative stress is a significant contributor to the pathogenesis of diabetic nephropathy. Carnosine is a natural radical oxygen species scavenger. We investigated the effect of carnosine as an adjuvant therapy on urinary albumin excretion (UAE), the tubular damage marker alpha 1-microglobulin (A1M), and oxidative stress in pediatric patients with type 1 diabetes and nephropathy. METHODS: This randomized placebo-controlled trial included 90 patients with diabetic nephropathy, despite oral angiotensin-converting enzyme inhibitors (ACE-Is), who were randomly assigned to receive either 12 weeks of carnosine 1 g/day (n = 45), or matching placebo (n = 45)...
July 26, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28744782/storage-of-nitroglycerin-ntg-admixed-with-hboc-201-for-30%C3%A2-days-in-polyolefin-plastic-bags-a-pilot-study
#3
Savita Nigam, Richard McCarron, Francoise Arnaud
Hemorrhaged animals have benefited from resuscitation with the hemoglobin-based oxygen carrier (HBOC-201). Co-infusion of nitric oxide (NO) via separate intravascular lines is effective in attenuating HBOC-induced elevation of blood pressure. We tested whether nitroglycerin (NTG) and HBOC-201 can be packaged together as a single drug for resuscitation. Since NTG binds easily to plastics such as polyvinylchloride, we assessed the stability of this combination in oxygen barrier double-layer ethylene-vinyl alcohol/polyolefin bags over a 30-day period...
July 25, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28737033/rapid-identification-of-meat-species-by-the-internal-extractive-electrospray-ionization-mass-spectrometry-of-hemoglobin-selectively-extracted-on-functionalized-graphene-oxide
#4
Lili Song, Jiaquan Xu, Konstantin Chingin, Tenggao Zhu, Yue Zhang, Yong Tian, Huanwen Chen, Xuwei Chen
Hemoglobin (Hb) present in the blood and meat juice samples was selectively adsorbed by graphene oxide (GO) particles functionalized with amylopectin (AP) and was sensitively detected by the direct internal extractive electrospray ionization mass spectrometry (iEESI-MS) analysis for the identification of meat type. Various samples including the whole blood samples of chicken, duck, sheep, mouse, pigeon, turtledove and meat juice mixtures were successfully identified based on the difference in molecular composition of Hb reflected in MS...
July 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28734789/weathered-mc252-crude-oil-induced-anemia-and-abnormal-erythroid-morphology-in-double-crested-cormorants-phalacrocorax-auritus-with-light-microscopic-and-ultrastructural-description-of-heinz-bodies
#5
Kendal E Harr, Fred L Cunningham, Chris A Pritsos, Karen L Pritsos, Thivanka Muthumalage, Brian S Dorr, Katherine E Horak, Katie C Hanson-Dorr, Karen M Dean, Dave Cacela, Andrew K McFadden, Jane E Link, Katherine A Healy, Pete Tuttle, Steven J Bursian
Injury assessment of birds following the Deepwater Horizon (DWH) oil spill in 2010 was part of the Natural Resource Damage Assessment. One reported effect was hemolytic anemia with the presence of Heinz bodies (HB) in birds, however, the role of route and magnitude of exposure to oil is unknown. The purpose of the present study was to determine if double-crested cormorants (Phalacocorax auritis; DCCO) exposed orally and dermally to artificially weathered crude oil would develop hemolytic anemia including HB and reticulocytosis...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28728928/gtf-231-a-mixture-of-gymnemic-acid-trigonelline-and-ferulic-acid-significantly-ameliorates-oxidative-stress-in-experimental-type-2-diabetes-in-rats
#6
Roshana Devi Vellai, Sharmila Chandiran, Subramanian Sorimuthu Pillai
OBJECTIVES: According to a report by the United States National Health and Nutrition Examination Survey, nearly 60% of patients with diabetes have more than one complication caused by chronic diabetes. Type 2 diabetes is a multifactorial metabolic disorder that accounts for more than 95% of people with diabetes and usually requires multitargeted therapeutic interventions. It arises due to insufficient insulin secretion or its action or both. Recently, we reported that the oral administration of gymnemic acid, trigonelline and ferulic acid in the ratio of 2:3:1 (GTF-231), a mixture of 3 phytoingredients at a concentration of 300 mg/kg body weight significantly improved the glucose homeostasis in rats with low-dose streptozotocin-induced type 2 diabetes that were fed with high-fat diet...
July 17, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28728402/influence-of-body-condition-score-at-calving-on-the-metabolic-status-and-production-performance-of-murrah-buffaloes-bubalus-bubalis-during-the-transition-period
#7
Nelson Carvalho Delfino, Lucas Fialho de Aragão Bulcão, Henry Daniel Ruiz Alba, Mauricio Xavier da Silva Oliveira, Filipe Pinheiro Soares de Queiroz, Gleidson Giordano Pinto de Carvalho, Francisco Palma Rennó, José Esler Freitas Júnior
Objective: The purpose of this study was to evaluate the influence of body condition score (BCS) at calving on the metabolic status of female Murrah buffaloes in the transition period. Methods: Thirty-seven pregnant buffaloes (multiparous) were selected and monitored during the transition period based on their body condition score and on the estimated calving date. Two groups were formed: 1) buffaloes with a BCS > 3.5 (n = 17); this group was classified and named 'high BCS at calving' (HBCS); and 2) buffaloes with a BCS ≤ 3...
July 17, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28721813/mechanisms-involved-in-the-increased-hemolysis-in-the-fetus-and-newborn
#8
Giuseppe Buonocore, Serafina Perrone, Rodolfo Bracci
BACKGROUND: The suicidal death of erythrocytes should be considered a possible cause of hemolysis and plasma bilirubin overload when there is no evidence of an immune-mediated hemolytic anemia, no consumptive red blood cell disorder, no morphologic or laboratory data to suggest a problem of the red cell membrane, and no evidence of a quantitative or qualitative defect in hemoglobin synthesis. OBJECTIVE: In neonatal period, xenobiotics, cytokines, osmotic shock, energy depletion, oxidative stress, and variation of temperature may induce an alteration of balance between damaging and protecting factors which can be followed by red cell death...
July 18, 2017: Current Pediatric Reviews
https://www.readbyqxmd.com/read/28712866/cell-free-methemoglobin-drives-platelets-to-apoptosis-via-mitochondrial-ros-mediated-activation-of-jnk-and-p38-map-kinase
#9
Somanathapura K NaveenKumar, Mahadevappa Hemshekhar, Mahalingam S Sundaram, Kempaiah Kemparaju, Kesturu S Girish
Cell-free hemoglobin (Hb), a well-known marker of intravascular hemolysis, is eventually oxidized to methemoglobin (MtHb). Elevated levels of MtHb have been noted, alongside depleted levels of platelets, in several hemolytic diseases. The current study aims to probe the possible role of MtHb in platelet death, based on the facts that it is a pro-inflammatory and pro-apoptotic agent, as well as the sensitive nature of platelets and their tendency to undergo apoptosis under oxidative stress. Consequently an attempt is made to establish the link between hemolysis and thrombocytopenia, by deciphering the underlying molecular signaling pathways...
July 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28712131/a-novel-antibacterial-peptide-derived-from-crocodylus-siamensis-hemoglobin-hydrolysate-induces-membrane-permeabilisation-causing-iron-dysregulation-oxidative-stress-and-bacterial-death
#10
J Lueangsakulthai, N Jangpromma, T Temsiripong, J E McKendrick, W Khunkitti, S E Maddocks, S Klaynongsruang
AIMS: A novel antibacterial peptide from Crocodylus siamensis hemoglobin hydrolysate (CHHs) was characterised for antimicrobial activity. METHODS AND RESULTS: CHHs was hydrolysed for 2 h (2h-CHH), 4 h (4h-CHH), 6 h (6h-CHH) and 8 h (8h-CHH). 8h-CHH showed antibacterial activity against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa at concentrations of 20, 20, 20 and 10 mg ml(-1) (w/v), respectively. Fluorescent microscopy revealed that 8h-CHH had bactericidal activity against E...
July 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28697999/the-protective-role-of-tet2-in-erythroid-iron-homeostasis-against-oxidative-stress-and-erythropoiesis
#11
Shanqi Guo, Xingkang Jiang, Yuanyuan Wang, Liwei Chen, Huzi Li, Xiaojiang Li, Yingjie Jia
Although previous studies suggested that stress erythropoiesis and iron metabolism regulate each other to increase iron availability for hemoglobin synthesis, the molecular bases determining its different traits remain elusive. In addition, global DNA demethylation has been reported during mouse erythropoiesis in vivo. However, the understanding of iron-related genes through DNA demethylation under stress erythropoiesis is largely unknown. In the current study, we found disordered iron homeostasis and misregulated hepcidin-ferroportin axis under stress erythropoiesis...
July 8, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28694810/oxidized-hemoglobin-is-antigenic-and-immunogenic-in-lupus
#12
Sonia Jain, Anjali Bose, Banajit Bastia, Hritika Sharma, Ruchi Sachdeva, Arun K Jain, Rahul Pal
Hemolysis-associated anemia is characteristic of diseases such as atherosclerosis, lupus, malaria, and leishmaniasis; the toxic effects of free hemoglobin (Hb) have been extensively described. This study was based on the premise that release of this sequestered, inflammatory molecule can result in deleterious immunological consequences, particularly in the context of pre-existing lupus. IgG anti-Hb responses were detected in the sera of lupus patients. Lupus-prone mice exhibited heightened plasma Hb levels, and ferric (Fe(3+)) Hb triggered preferential release of lupus-associated cytokines from splenocytes derived from aging lupus-prone mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28685513/effects-of-vildagliptin-or-pioglitazone-on-glycemic-variability-and-oxidative-stress-in-patients-with-type-2-diabetes-inadequately-controlled-with-metformin-monotherapy-a-16-week-randomised-open-label-pilot-study
#13
Nam Hoon Kim, Dong Lim Kim, Kyeong Jin Kim, Nan Hee Kim, Kyung Mook Choi, Sei Hyun Baik, Sin Gon Kim
BACKGROUND: Glycemic variability is associated with the development of diabetic complications through the activation of oxidative stress. This study aimed to evaluate the effects of a dipeptidyl peptidase 4 inhibitor, vildagliptin, or a thiazolidinedione, pioglitazone, on glycemic variability and oxidative stress in patients with type 2 diabetes. METHODS: In this open label, randomised, active-controlled, pilot trial, individuals who were inadequately controlled with metformin monotherapy were assigned to either vildagliptin (50 mg twice daily, n=17) or pioglitazone (15 mg once daily, n=14) treatment groups for 16 weeks...
June 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28685465/the-penultimate-tyrosine-residues-are-critical-for-the-genotoxic-effect-of-human-hemoglobin
#14
Sandeep Chakane, Vijay Markad, Kisan Kodam, Leif Bülow
Hemoglobin (Hb) is a potent oxidant outside the erythrocyte. The tyrosines α140 and β145 play an important role in the structure and function of Hb by forming switch and hinge contacts. These carboxy-terminal residues of the alpha and beta chains, respectively, were replaced to phenylalanine and several different methods were used to characterize the obtained mutants including a comet and plasmid DNA cleavage assay. It was observed that the genotoxic effect was 40% higher for αY140F compared with the wildtype, the βY145F and the double (αY140/β145F) mutants as determined by the comet assay...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28683796/effectiveness-of-dapagliflozin-on-vascular-endothelial-function-and-glycemic-control-in-patients-with-early-stage-type-2-diabetes-mellitus-defence-study
#15
Fumika Shigiyama, Naoki Kumashiro, Masahiko Miyagi, Kayoko Ikehara, Eiichiro Kanda, Hiroshi Uchino, Takahisa Hirose
BACKGROUND: Recent studies reported that sodium glucose cotransporter 2 (SGLT2) inhibitors can potentially reduce the risk of cardiovascular mortality in patients with type 2 diabetes mellitus (T2DM). However, there is little or no information on the therapeutic effects of SGLT2 inhibitors on the progression of atherosclerosis. This dapagliflozin effectiveness on vascular endothelial function and glycemic control (DEFENCE) study was designed to determine the effects of dapagliflozin, a SGLT2 inhibitor, on endothelial function in patients with early-stage T2DM...
July 6, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28682407/selective-protein-transport-through-ultra-thin-suspended-reduced-graphene-oxide-nanopores
#16
Dae-Sik Lee, Seokhan Park, Yong Duk Han, Jae Eun Lee, Hu Young Jeong, Hyun C Yoon, Moon Yeon Jung, Sang Ouk Kim, Sung-Yool Choi
The nanoporous free-standing graphene membrane is of great interest in high performance separation technology. In particular, the separation of biological molecules with similar sizes is one of the key challenges in the purification of biomaterials. Here, we report a reliable, cost-effective, and facile method for the fabrication of a graphene-based nanosieve and its application in the separation of similar-size proteins. A suspended reduced graphene oxide (rGO) nanosieve with ultra-thin, large-area, well-ordered, and dense 15 nm-sized pores was fabricated using block copolymer (BCP) lithography...
July 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/28679351/modulatory-effects-of-quercetin-on-liver-histopathological-biochemical-hematological-oxidative-stress-and-dna-alterations-in-rats-exposed-to-graded-doses-of-score-250
#17
Sabrine Kasmi, Intithar Bkhairia, Bahira Harrabi, Hela Mnif, Rim Marrakchi, Hanen Ghozzi, Choumous Kallel, Moncef Nasri, Khaled Zeghal, Kamel Jamoussi, Ahmed Hakim
This study investigated the morphological, biochemical and molecular aspects of liver injury in rats after the exposure to difenoconazole and the protective effects of quercetin against hepatotoxicity and genotoxicity induced by this fungicide. Rats were given graded doses of difenoconazole associated or not to quercetin daily for 20 days. Our results showed a significant increase in PLT (Platelets) and WBC (white blood cells) in rats treated with higher doses of difenoconazole (1/38 and 1/9 of LD50). However, a significant decrease in Hb (Hemoglobin) rate and RBC (Red blood cells) number in rats treated with higher doses of difenoconazole (1/38 and 1/9 of LD50) was obtained...
July 5, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28675957/protective-mechanism-of-turmeric-curcuma-longa-on-carbofuran-induced-hematological-and-hepatic-toxicities-in-a-rat-model
#18
Md Sakib Hossen, E M Tanvir, Maruf Billah Prince, Sudip Paul, Moumoni Saha, Md Yousuf Ali, Siew Hua Gan, Md Ibrahim Khalil, Nurul Karim
CONTEXT: Turmeric (Curcuma longa L. [Zingiberaceae]) is used in the treatment of a variety of conditions including pesticide-induced toxicity. OBJECTIVE: The study reports the antioxidant properties and the protective effects of turmeric against carbofuran (CF)-induced toxicity in rats. MATERIALS AND METHODS: The antioxidant potential was determined by using free radicals scavenging activity and ferric reducing antioxidant power values. Male Wistar rats were randomly divided into four groups, designated as control, turmeric (100 mg/kg/day), CF (1 mg/kg/day) and turmeric (100 mg/kg/day) + CF (1 mg/kg/day) treatments...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28671819/efficient-reduction-of-vertebrate-cytoglobins-by-the-cytochrome-b5-cytochrome-b5-reductase-nadh-system
#19
Matthew B Amdahl, Courtney E Sparacino-Watkins, Paola Corti, Mark T Gladwin, Jesús Tejero
Cytoglobin is a heme-containing protein ubiquitous in mammalian tissues. Unlike the evolutionarily related proteins hemoglobin and myoglobin, cytoglobin shows a six-coordinated heme binding, with the heme iron coordinated by two histidine side chains. Cytoglobin is involved in cytoprotection pathways through yet undefined mechanisms, and it has recently been demonstrated that cytoglobin has redox signaling properties via nitric oxide (NO) and nitrite metabolism. The reduced, ferrous cytoglobin can bind oxygen and will react with NO in a dioxygenation reaction to form nitrate, which dampens NO signaling...
July 19, 2017: Biochemistry
https://www.readbyqxmd.com/read/28662118/low-levels-of-serum-ferritin-and-moderate-transferrin-saturation-lead-to-adequate-hemoglobin-levels-in-hemodialysis-patients-retrospective-observational-study
#20
Chie Ogawa, Ken Tsuchiya, Naohisa Tomosugi, Fumiyoshi Kanda, Kunimi Maeda, Teiryo Maeda
BACKGROUND: Optimal iron levels in patients on hemodialysis are currently unknown, and a higher level than that for the healthy population is usually set for such patients considering the use of erythropoiesis-stimulating agents or the occurrence of chronic inflammation. However, excessive iron causes oxidative stress and impairment of its utilization by cells. Therefore we investigated the relationship between hemoglobin (Hb) level and iron status in hemodialysis patients to identify the optimal iron levels for patients undergoing hemodialysis...
2017: PloS One
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