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https://www.readbyqxmd.com/read/28213526/structural-and-mechanistic-insights-into-hemoglobin-catalyzed-hydrogen-sulfide-oxidation-and-the-fate-of-polysulfide-products
#1
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/28197706/efficacy-of-the-red-blood-cell-distribution-width-for-predicting-the-prognosis-of-bell-palsy-a-pilot-study
#2
Yuichiro Horibe, Tohru Tanigawa, Rei Shibata, Hiroshi Nonoyama, Fumiya Kano, Satoshi Yamaguchi, Kenta Murotani, Takaki Ogawa, Hiromi Ueda
The aim of this study was to investigate the association between RDW values and the prognosis of patients with Bell palsy in an effort to find a prognostic biomarker that predicts recovery from Bell palsy. We measured RDW and evaluated facial movement in 61 patients with Bell palsy aged 50 years and less. All patients were treated with a steroid plus an antiviral agent. Seven patients underwent surgery for facial nerve decompression. During the post-treatment period, patients with a Yanagihara grading score of 36 or more were regarded as having a satisfactory recovery...
February 14, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28196095/depth-dependent-flow-and-pressure-characteristics-in-cortical-microvascular-networks
#3
Franca Schmid, Philbert S Tsai, David Kleinfeld, Patrick Jenny, Bruno Weber
A better knowledge of the flow and pressure distribution in realistic microvascular networks is needed for improving our understanding of neurovascular coupling mechanisms and the related measurement techniques. Here, numerical simulations with discrete tracking of red blood cells (RBCs) are performed in three realistic microvascular networks from the mouse cerebral cortex. Our analysis is based on trajectories of individual RBCs and focuses on layer-specific flow phenomena until a cortical depth of 1 mm. The individual RBC trajectories reveal that in the capillary bed RBCs preferentially move in plane...
February 14, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28192772/direct-3d-bioprinting-of-prevascularized-tissue-constructs-with-complex-microarchitecture
#4
Wei Zhu, Xin Qu, Jie Zhu, Xuanyi Ma, Sherrina Patel, Justin Liu, Pengrui Wang, Cheuk Sun Edwin Lai, Maling Gou, Yang Xu, Kang Zhang, Shaochen Chen
Living tissues rely heavily on vascular networks to transport nutrients, oxygen and metabolic waste. However, there still remains a need for a simple and efficient approach to engineer vascularized tissues. Here, we created prevascularized tissues with complex three-dimensional (3D) microarchitectures using a rapid bioprinting method - microscale continuous optical bioprinting (μCOB). Multiple cell types mimicking the native vascular cell composition were encapsulated directly into hydrogels with precisely controlled distribution without the need of sacrificial materials or perfusion...
February 2, 2017: Biomaterials
https://www.readbyqxmd.com/read/28187318/effect-of-maternal-cells-transferred-with-colostrum-on-the-health-of-neonate-calves
#5
Sylvia Marquart Fontes Novo, Juliana Fraça Dos Reis Costa, Camila Costa Baccili, Natália Meirelles Sobreira, Bruno Toledo Silva, Pamella Lorenci de Oliveira, David John Hurley, Viviani Gomes
The objective of this research was to evaluate the influence of cells from colostrum on the health of neonate calves. Animals were distributed in 2 groups: COL+ (n=9) which received fresh colostrum from their own damns; and COL- (n=10) which received frozen colostrums from donors. Heifers were assessed before colostrum intake - D0; D2; D7; D14; D21 and D28. Heifers were monitored by clinical examination, hematological profile and serum iron. COL- had a higher diarrhea intensity score (typically 3) on D7. Moreover, a single case each of bronchopneumonia and navel inflammation were observed in COL- calves...
January 27, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28186586/-analysis-of-clinical-phenotype-and-genotype-of-unstable-hemoglobin-rush
#6
Shijun Ge, Biqing Yang, Wei Yi, Kai Huang, Hongxian Liu, Xiaoqin Huang, Jiayou Chu, Zhaoqing Yang
OBJECTIVE: To analyze the hematological and genetic characteristics of unstable hemoglobin Rush (Hb Rush) and compound heterozygote of Hb Rush and thalassemia. METHODS: Peripheral blood samples and genomic DNA from three patients (including two ethnic Dai and one Han Chinese) with anemia of undetermined origin were collected. Hematological phenotypes of these patients were determined through red blood cell analysis and hemoglobin electrophoresis. Genotypes of alpha- and beta-globin genes, -158 XmnⅠ polymorphic site of (G)γ promoter region, and haplotypes of 7 polymorphic restriction sites in the beta-globin gene cluster were determined using PCR-based methods and DNA sequencing...
February 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28182351/increased-red-cell-distribution-width-is-strong-inflammatory-marker-of-liver-diseases-in-a-guangxi-population
#7
Fang Lan, Huiping Wei, Xuan Zhu, Shan Li, Xue Qin
BACKGROUND: Red cell distribution width (RDW), part of a routine complete blood count in a clinical laboratory, has been widely and routinely used in the diagnosis of various diseases. The aim of the present study was to investigate the relationship between increased RDW and liver diseases and whether RDW is a new inflammatory marker for liver diseases in a Guangxi population. METHODS: A total of 735 patients were enrolled in our study, including 113 patients with chronic hepatitis B (CHB), 133 liver cirrhosis (LC) patients, 105 patients with hepatocellular carcinoma (HCC), 55 alcoholic hepatitis (AH) patients, 44 chronic hepatitis C (CHC) patients, and 285 healthy persons...
February 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28179703/evaluation-of-five-discriminating-indexes-to-distinguish-beta-thalassemia-trait-from-iron-deficiency-anaemia
#8
Zahid Ullah, Aamer Ali Khattak, Sara Arif Ali, Javaid Hussain, Badshah Noor, Raheela Bano, Muhammad Amin Jan Mahsud
OBJECTIVE: To assess the reliability of different red blood cell indices-based formulae in the indexes formula in differential diagnosis of beta thalassemia trait and iron deficiency anaemia. METHODS: This cross-sectional study was conducted between January and October 2015 in Dera Ismail Khan in the Khyber Pakhtunkhwa province of Pakistan. Patients of beta thalassemia trait and iron deficiency anaemia were registered irrespective of age and gender. About 5 mL of blood was taken from each patient to analyse different red cell parameters like red blood cell count, haemoglobin, mean cell volume, mean cell haemoglobin, mean cell haemoglobin concentration, and red cell distribution width...
December 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28179102/impact-of-surface-grafting-density-of-peg-macromolecules-on-dually-fluorescent-silica-nanoparticles-used-for-the-in-vivo-imaging-of-subcutaneous-tumors
#9
Laurent Adumeau, Coralie Genevois, Lydia Roudier, Christophe Schatz, Franck Couillaud, Stéphane Mornet
BACKGROUND: In the context of systematically administered nanomedicines, the physicochemistry of NP surfaces must be controlled as a prerequisite to improve blood circulation time, and passive and active targeting. In particular, there is a real need to develop NP stealth and labelling for both in vivo and microscopic fluorescence imaging in a mice model. METHODS: We have synthesized NIR/red dually fluorescent silica nanoparticles of 19nm covalently covered by a PEG layer of different grafting density in the brush conformational regime by using a reductive amination reaction...
February 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28177364/effects-of-group-size-floor-space-allowance-during-the-nursery-phase-of-production-on-growth-physiology-and-hematology-in-replacement-gilts
#10
S R Callahan, A J Cross, A E DeDecker, M D Lindemann, M J Estienne
The objective was to determine effects of nursery group-size-floor space allowance on growth, physiology, and hematology of replacement gilts. A 3 × 3 factorial arrangement of treatments was used wherein gilts classified as large, medium, or small ( = 2537; BW = 5.6 ± 0.6 kg) from 13 groups of weaned pigs were placed in pens of 14, 11, or 8 pigs resulting in floor space allowances of 0.15, 0.19, or 0.27 m/pig, respectively. Pigs were weighed on d 0 (weaning) and d 46 (exit from nursery). The ADG was affected by group-size-floor space allowance × pig size ( = 0...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28164679/changes-in-red-blood-cell-distribution-width-is-associated-with-liver-function-parameters-and-prognosis-in-patients-with-chronic-hbv-liver-disease
#11
Yang Kai, Guan Zishu, Guan Shihe, Gao Yufeng, Zhou Qiang
BACKGROUND: Hepatitis B virus (HBV) infection represents a major threat to global public health, especially in China. The clear pathogenesis of chronic HBV infection (CHB) has not been fully elucidated, but inflammation is widely accepted to play an important role. Emerging evidence suggests that red blood cell distribution (RDW) is a novel potential marker of inflammatory responses. The present study aimed to investigate the clinical relevance of elevated RDW in the patients with chronic HBV liver disease ICP...
November 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
#12
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/28164513/baseline-red-blood-cell-distribution-width-correlates-with-disease-activity-and-therapeutic-outcomes-in-patients-with-systemic-lupus-erythematosus-irrespective-of-anemia-status
#13
Xing-Li Zou, Xiao-Jing Lin, Xun Ni, Jing Wang, Wen Liu, Jin Wei
BACKGROUND: Red blood cell distribution width (RDW) has been recently found to reflect systemic inflammation in addition to anisocytosis, and its value for assessing disease activity of systemic lupus erythematosus (SLE) has been addressed in two studies, but its correlation with therapeutic outcomes and disease flare has not been evaluated. METHODS: One hundred and ninety-six newly diagnosed patients with SLE (all-SLE), including 105 non-anemic patients (na-SLE) and 91 patients with anemia (a-SLE) were prospectively studied...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28157207/mapping-the-distribution-of-specific-antibody-interaction-forces-on-individual-red-blood-cells
#14
Natasha Yeow, Rico F Tabor, Gil Garnier
Current blood typing methods rely on the agglutination of red blood cells (RBCs) to macroscopically indicate a positive result. An indirect agglutination mechanism is required when blood typing with IgG forms of antibodies. To date, the interaction forces between anti-IgG and IgG antibodies have been poorly quantified, and blood group related antigens have never been quantified with the atomic force microscope (AFM). Instead, the total intensity resulting from fluorescent-tagged antibodies adsorbed on RBC has been measured to calculate an average antigen density on a series of RBCs...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28156480/effect-of-red-blood-cell-transfusions-on-patient-reported-outcomes-in-an-ambulatory-oncology-population
#15
Kimberly D Moeller, Lawrence David Wagman
: 78 Background: The standard transfusion (Tf) trigger in the hospitalized patient is hemoglobin (Hgb) level driven. Triggers in the ambulatory oncology population are often symptom based. The symptoms of exercise intolerance (EI), fatigue (F), and shortness of breath (SOB) were identified from a hospital quality review. The purpose of this study was to evaluate patient reported symptom (SX) changes following red blood cell (RBC) Tf. METHODS: Standardized Tf orders required symptom indication(s) which include EI, F, SOB and Other...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28153627/hematological-evaluation-in-males-with-obstructive-sleep-apnea-before-and-after-positive-airway-pressure
#16
A Feliciano, R Linhas, R Marçôa, A Cysneiros, C Martinho, R P Reis, D Penque, P Pinto, C Bárbara
Obstructive sleep apnea syndrome (OSAS) is a systemic inflammatory disease associated with cardiovascular consequences. Red blood cell distribution width (RDW), mean platelet volume (MPV), and platelet distribution width (PDW) are recognized biomarkers of cardiovascular morbidity/mortality. Limited data is available on the association between these parameters and OSAS severity and the relationship with positive airway pressure therapy (PAP). In this prospective study of male OSAS patients we analyzed hematological data in order to evaluate their value in predicting OSAS severity, the relationship with sleep parameters, and their behavior under PAP...
January 30, 2017: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/28151688/structural-insights-into-a-hemoglobin-albumin-cluster-in-aqueous-medium
#17
Ryuichi Shinohara, Taiga Yamada, Boris Schade, Christoph Böttcher, Takaaki Sato, Natsuhiko Sugimura, Toshimichi Shibue, Teruyuki Komatsu
A hemoglobin (Hb) wrapped covalently by three human serum albumins (HSAs) is a triangular protein cluster designed as an artificial O2-carrier and red blood cell substitute. We report the structural insights into this Hb-HSA3 cluster in aqueous medium revealed by 3D reconstruction based on cryogenic transmission electron microscopy (cryo-TEM) data and small-angle X-ray scattering (SAXS) measurements. Cryo-TEM observations showed individual particles with approximately 15 nm diameter in the vitrified ice layer...
February 6, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28150349/a-national-review-of-the-clinical-use-of-group-o-d-red-blood-cell-units
#18
Rena Hirani, Janet Wong, Perfecto Diaz, Phillip Mondy, Chris Hogan, Peta M Dennington, Joanne Pink, David O Irving
BACKGROUND: There has been an international decline in the demand for red blood cell (RBC) units. In Australia, there has been a 21% reduction in demand between 2012 and 2015. In contrast, the demand for the "universal" group O D- RBC units is in fact proportionally increasing. STUDY DESIGN AND METHODS: The clinical use of the entire O D- RBC distribution for a 5-week period throughout Australia was reviewed. Fate data on each unit issued (n = 9733) were collected that included the indication and urgency of transfusion, reason for discard, component age, and patient demographics...
February 1, 2017: Transfusion
https://www.readbyqxmd.com/read/28148818/life-on-the-edge-o2-binding-in-atlantic-cod-red-blood-cells-near-their-southern-distribution-limit-is-not-sensitive-to-temperature-or-haemoglobin-genotype
#19
Samantha L Barlow, Julian Metcalfe, David A Righton, Michael Berenbrink
Atlantic cod are a commercially important species believed to be threatened by warming seas near their southern, equatorward upper thermal edge of distribution. Limitations to circulatory O2 transport, in particular cardiac output, and the geographic distribution of functionally different haemoglobin (Hb) genotypes have separately been suggested to play a role in setting thermal tolerance in this species. The present study assessed the thermal sensitivity of O2 binding in Atlantic cod red blood cells with different Hb genotypes near their upper thermal distribution limit and modelled its consequences for the arterio-venous O2 saturation difference, Sa-vO2 , another major determinant of circulatory O2 supply rate...
February 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28143953/hemolytic-anemia-repressed-hepcidin-level-without-hepatocyte-iron-overload-lesson-from-g%C3%A3-nther-disease-model
#20
Sarah Millot, Constance Delaby, Boualem Moulouel, Thibaud Lefebvre, Nathalie Pilard, Nicolas Ducrot, Cécile Ged, Philippe Lettéron, Lucia de Franceschi, Jean Charles Deybach, Carole Beaumont, Laurent Gouya, Hubert De Verneuil, Saïd Lyoumi, Hervé Puy, Zoubida Karim
Hemolysis occurring in hematologic diseases is often associated with an iron loading anemia. This iron overload is the result of a massive outflow of hemoglobin into the bloodstream, but the mechanism of hemoglobin handling has not been fully elucidated. Here, in a congenital erythropoietic porphyria mouse model, we evaluate the impact of hemolysis and regenerative anemia on hepcidin synthesis and iron metabolism. Hemolysis was confirmed by a complete drop in haptoglobin, hemopexin and increased plasma lactate dehydrogenase, an increased red blood cell distribution width and osmotic fragility, a reduced half-life of red blood cells, and increased expression of heme oxygenase 1...
February 2017: Haematologica
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