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erythrocyte deformability

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https://www.readbyqxmd.com/read/29215846/-possibilities-of-correction-rheological-blood-svoytv-at-chipped-and-cut-wounds-of-the-breast
#1
V V Masljakov, O A Suhanova, V G Barsukov, K G Kurkin, S A Suhanov
The purpose: research objective: to study influence of electromagnetic oscillations of millimetric range on rheological properties of blood at patients with chipped and cut wounds of a breast for the purpose of their correction. Methods. For the solution of a research objective we have carried out studying of changes of rheological properties of blood at the 22nd patient with the getting chipped and cut wounds of a breast without internal injury during the next postoperative period. All patient has executed primary surgical processing and drainage of a pleural cavity...
April 2017: Patologicheskaia Fiziologiia i èksperimental'naia Terapiia
https://www.readbyqxmd.com/read/29185111/factors-influencing-spinal-sagittal-balance-bone-mineral-density-and-oswestry-disability-index-outcome-measures-in-patients-with-rheumatoid-arthritis
#2
Kazutaka Masamoto, Bungo Otsuki, Shunsuke Fujibayashi, Koichiro Shima, Hiromu Ito, Moritoshi Furu, Motomu Hashimoto, Masao Tanaka, Stephen Lyman, Hiroyuki Yoshitomi, Shimei Tanida, Tsuneyo Mimori, Shuichi Matsuda
PURPOSE: To identify the factors influencing spinal sagittal alignment, bone mineral density (BMD), and Oswestry Disability Index (ODI) outcome measures in patients with rheumatoid arthritis (RA). METHODS: We enrolled 272 RA patients to identify the factors influencing sagittal vertical axis (SVA). Out of this, 220 had evaluation of bone mineral density (BMD) and vertebral deformity (VD) on the sagittal plane; 183 completed the ODI questionnaire. We collected data regarding RA-associated clinical parameters and standing lateral X-ray images via an ODI questionnaire from April to December 2012 at a single center...
November 28, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29175339/molecular-mechanisms-of-deformability-of-plasmodium-infected-erythrocytes
#3
REVIEW
Catherine Lavazec
In physiological conditions, normal erythrocytes are highly deformable due to their high surface area to volume ratio, their moderate cytoplasmic viscosity and the elasticity of their membrane skeleton. Infection with the human malaria parasite Plasmodium falciparum induces dramatic changes in cellular deformability and membrane elasticity of their host erythrocyte, in part due to the shape and the volume of the parasite itself, and to the export of parasite proteins that interact with host membrane skeletal proteins...
November 22, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29145008/morphological-changes-in-erythrocytes-of-people-with-type-2-diabetes-mellitus-evaluated-with-atomic-force-microscopy-a-brief-review
#4
REVIEW
Alejandra Loyola-Leyva, Juan Pablo Loyola-Rodríguez, Marco Atzori, Francisco Javier González
Prevalence of type 2 diabetes mellitus (T2DM) has been increasing worldwide. Cardiovascular diseases are one of the main causes of death among people with T2DM. Morphological changes in erythrocytes have been associated with higher risk of cardiovascular diseases. Atomic force microscopy (AFM) is a new technique that allows non-invasive imaging of cells and the evaluation of changes in mechanical properties. AIM: To evaluate by AFM the erythrocytes morphological changes of people with T2DM METHODS: Search was conducted from in PubMed, ScienceDirect, Scielo, and Lilacs...
November 10, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29133350/extracellular-histones-induce-erythrocyte-fragility-and-anemia
#5
Farzaneh Kordbacheh, Connor H O'Meara, Lucy A Coupland, Patrick M Lelliott, Christopher R Parish
Extracellular histones have been shown to play an important pathogenic role in many diseases, primarily through their cytotoxicity towards nucleated cells and their ability to promote platelet activation with resultant thrombosis and thrombocytopenia. In contrast, little is known about the effect of extracellular histones on erythrocyte function. We demonstrate here that histones promote erythrocyte aggregation, sedimentation and, using a novel in vitro shear stress model, induce erythrocyte fragility and lysis in a concentration dependent manner...
November 13, 2017: Blood
https://www.readbyqxmd.com/read/29128605/erythrocytes-as-a-biological-model-for-screening-of-xenobiotics-toxicity
#6
REVIEW
Mayada Ragab Farag, Mahmoud Alagawany
Erythrocytes are the main cells in circulation. They are devoid of internal membrane structures and easy to be isolated and handled providing a good model for different assays. Red blood cells (RBCs) plasma membrane is a multi-component structure that keeps the cell morphology, elasticity, flexibility and deformability. Alteration of membrane structure upon exposure to xenobiotics could induce various cellular abnormalities and releasing of intracellular components. Therefore the morphological changes and extracellular release of haemoglobin [hemolysis] and increased content of extracellular adenosine triphosphate (ATP) [as signs of membrane stability] could be used to evaluate the cytotoxic effects of various molecules...
November 8, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29124118/chemical-analysis-and-evaluation-of-antioxidant-antimicrobial-and-photoprotective-activities-of-schinopsis-brasiliensis-engl-anacardiaceae
#7
Sarah Raquel Gomes de Lima-Saraiva, Fernanda Granja da Silva Oliveira, Raimundo Gonçalves de Oliveira Junior, Camila de Souza Araújo, Ana Paula de Oliveira, Alessandra Gomes Marques Pacheco, Larissa Araújo Rolim, Elba Lúcia Cavalcanti de Amorim, Francine Celise Siqueira César, Jackson Roberto Guedes da Silva Almeida
Schinopsis brasiliensis Engl. is a native plant of Caatinga which has high concentrations of compounds capable of absorbing ultraviolet light, suggesting its potential application for the development of sunscreen preparations. After its identification and collection, this vegetable drug was submitted to a physicochemical analysis through the preparation of ethanolic extract. The phytochemical screening and analysis of extracts were carried out by high-performance liquid chromatography (HPLC) evaluation. The antioxidant activity of the extract was evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method and β-carotene bleaching test...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/29089816/impaired-hemorheology-in-exacerbations-of-copd
#8
Erhan Ugurlu, Emine Kilic-Toprak, Ilknur Can, Ozgen Kilic-Erkek, Goksel Altinisik, Melek Bor-Kucukatay
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is characterized by progressive airflow limitation. Cardiovascular-related comorbidities are established to contribute to morbidity and mortality especially during exacerbations. The aim of the current study was to determine alterations in hemorheology (erythrocyte aggregation, deformability) in newly diagnosed COPD patients and their response to medical treatment and to compare with values of COPD patients with exacerbations. MATERIALS AND METHODS: The study comprised 13 COPD patients, 12 controls, and 16 COPD patients with exacerbations...
2017: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/29074435/the-natural-compound-magnolol-affects-growth-biofilm-formation-and-ultrastructure-of-oral-candida-isolates
#9
Jawad Behbehani, Sheikh Shreaz, Mohammad Irshad, Maribassapa Karched
The incidence of oral candidosis has increased in recent years due to the escalation in HIV-infection, cancer treatments, organ transplantation, and diabetes. In addition, corticosteroid use, dentures, and broad-spectrum antibiotic use have also contributed to the problem. Treatment of oral candidosis has continued to be problematic because of the potential toxicity of antifungals in clinical use, and, above all, development of drug resistance among patients. In this study, the antifungal effect of magnolol was investigated against 64 strains of Candida spp...
October 23, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29073264/shelph2-a-bacterial-like-phosphatase-of-the-malaria-parasite-plasmodium-falciparum-is-dispensable-during-asexual-blood-stage
#10
Alexandra Miliu, Maryse Lebrun, Catherine Braun-Breton, Mauld H Lamarque
During the erythrocytic cycle of the malaria parasite Plasmodium falciparum, egress and invasion are essential steps finely controlled by reversible phosphorylation. In contrast to the growing number of kinases identified as key regulators, phosphatases have been poorly studied, and calcineurin is the only one identified so far to play a role in invasion. PfShelph2, a bacterial-like phosphatase, is a promising candidate to participate in the invasion process, as it was reported to be expressed late during the asexual blood stage and to reside within an apical compartment, yet distinct from rhoptry bulb, micronemes, or dense granules...
2017: PloS One
https://www.readbyqxmd.com/read/29053121/-possibilities-of-cavinton-therapy-regimen-for-infusions-and-cavinton-comforte-in-acute-and-early-recovery-periods-after-ischemic-stroke
#11
L A Belova, V V Mashin, A N Proshin, A N Ovsyannicova, B B Kostishko
AIM: To study the efficacy of a current regimen of treatment with cavinton for infusions and cavinton comforte in patients with ischemic stroke in acute and early recovery periods and to evaluate an impact of treatment on erythrocyte deformity using atomic power microscopy. MATERIAL AND METHODS: One hundred and sixty-four patients with hemispheric ischemic stroke, aged from 30 to 79 years, were randomized into main (n=100) and control (n=64) groups. Patients of the main group received complex treatment (basic therapy and cavinton R for drop infusions (10 intravenously during 10 days) followed by cavinton R comforte in dose 10 mg, 1 tablet 3 times a day during 90 days)...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29042854/influence-of-standard-laboratory-procedures-on-measures-of-erythrocyte-damage
#12
Lena Wiegmann, Diane A de Zélicourt, Oliver Speer, Alissa Muller, Jeroen S Goede, Burkhardt Seifert, Vartan Kurtcuoglu
The ability to characterize the mechanical properties of erythrocytes is important in clinical and research contexts: to diagnose and monitor hematologic disorders, as well as to optimize the design of cardiovascular implants and blood circulating devices with respect to blood damage. However, investigation of red blood cell (RBC) properties generally involves preparatory and processing steps. Even though these impose mechanical stresses on cells, little is known about their impact on the final measurement results...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29039727/identification-of-aptamers-that-bind-to-sickle-hemoglobin-and-inhibit-its-polymerization
#13
Shirley H Purvis, Jeffrey R Keefer, Yolanda M Fortenberry, Emily A Barron-Casella, James F Casella
The pathophysiology of sickle cell disease (SCD) is dependent on the polymerization of deoxygenated sickle hemoglobin (HbS), leading to erythrocyte deformation (sickling) and vaso-occlusion within the microvasculature. Following deoxygenation, there is a delay time before polymerization is initiated, during which nucleation of HbS monomers occurs. An agent with the ability to extend this delay time or slow polymerization would therefore hold a therapeutic, possibly curative, potential. We used the Systematic Evolution of Ligands by Exponential Enrichment (SELEX) method to screen for HbS-binding RNA aptamers modified with nuclease-resistant 2'-fluoropyrimidines...
October 17, 2017: Nucleic Acid Therapeutics
https://www.readbyqxmd.com/read/29036799/hemorheological-parameters-in-monoclonal-gammopathy-of-undetermined-significance-mgus
#14
G Caimi, E Hopps, M Carlisi, M Montana, E Gallà, R Lo Presti, S Siragusa
There is scarcity of information about the hemorheological pattern in subjects with Monoclonal Gammopathy of Undetermined Significance (MGUS). This preliminary research is focused on the behaviour of whole-blood and plasma viscosity, haematocrit and erythrocyte deformability in the above clinical condition. We enrolled 21 MGUS subjects (10 women and 11 men; mean age 66.4 ± 11.6 years). In fasting venous blood we examined whole-blood and plasma viscosity at high and low shear rates, haematocrit, the ratios between whole-blood viscosity (at high and low shear rate) and haematocrit × 100, the ratio between plasma viscosity at low and high shear rate, and the erythrocyte deformability expressed as elongation index...
October 7, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29036796/intestinal-ischemia-reperfusion-leads-to-early-systemic-micro-rheological-and-multiorgan-microcirculatory-alterations-in-the-rat
#15
Anita Mester, Zsuzsanna Magyar, Viktoria Sogor, Bence Tanczos, Yoav Stark, Konstantin Cherniavsky, Laszlo Bidiga, Katalin Peto, Norbert Nemeth
BACKGROUND: Intestinal ischemia-reperfusion (I/R) is a potentially life-threatening situation and its pathomechanism is not fully understood yet. OBJECTIVE: To investigate the early micro-rheological, microcirculatory and morphological consequences of intestinal I/R in a rat model. METHODS: CD rats were anesthetized and subjected to Control (n = 7) or I/R (n = 7) groups. Left femoral artery cannulation and median laparotomy were performed...
October 7, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29036795/erythrocyte-deformability-and-hemorheological-profile-in-multiple-myeloma
#16
G Caimi, M Carlisi, M Montana, E Gallà, R Lo Presti, E Hopps, S Siragusa
The hemorheological profile in multiple myeloma (MM) has been extensively studied. Our investigation regarded the behavior of whole-blood viscosity, plasma viscosity and erythrocyte deformability in MM. We enrolled 24 MM patients; 13 of them had been recently diagnosed and were at the initial stage of therapy, 6 were on consolidation/conservation therapy and 5 had achieved a complete remission. On fasting venous blood we evaluated whole-blood and plasma viscosity at high and low shear rates, haematocrit, the ratios between whole-blood viscosity (at high and low shear rate) and haematocrit×100, the ratio between plasma viscosity at low and high shear rate and the erythrocyte deformability examined by using laser diffractometry and expressed as elongation index...
October 7, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28989072/pentoxifylline-treatment-enhances-antihypertensive-activity-of-captopril-through-hemorheological-improvement-in-spontaneously-hypertensive-rats-during-development-of-arterial-hypertension
#17
Mark B Plotnikov, Alexander Y Shamanaev, Oleg I Aliev, Anastasia V Sidekhmenova, Anna M Anishchenko, Alexander M Arkhipov
The rheological properties of blood play a significant role in the onset and progression of arterial hypertension. The aim of our work was to evaluate the effect of the angiotensin-converting enzyme inhibitor captopril (20 mg/kg/d), pentoxifylline (PTX; 100 mg/kg/d), and the combination of captopril + PTX (20 + 100 mg/kg/d) on the hemodynamic and hemorheological parameters in spontaneously hypertensive rats (SHRs) during the development of arterial hypertension. In the group of animals that received captopril, the mean arterial pressure (MAP) was significantly lower by 30% due to a decrease in cardiac output of 23% and in total peripheral resistance (TPR) of 26% compared with the control group, whereas blood viscosity did not change significantly...
November 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28955799/liposomal-delivery-of-phosphodiesterase-5-inhibitors-augments-ut-15c-stimulated-atp-release-from-human-erythrocytes
#18
Elizabeth A Bowles, Dimitri Feys, Nuran Ercal, Randy S Sprague
The use of liposomes to affect targeted delivery of pharmaceutical agents to specific sites may result in the reduction of side effects and an increase in drug efficacy. Since liposomes are delivered intravascularly, erythrocytes, which constitute almost half of the volume of blood, are ideal targets for liposomal drug delivery. In vivo, erythrocytes serve not only in the role of oxygen transport but also as participants in the regulation of vascular diameter through the regulated release of the potent vasodilator, adenosine triphosphate (ATP)...
December 2017: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28919343/characterizing-pathology-in-erythrocytes-using-morphological-and-biophysical-membrane-properties-relation-to-impaired-hemorheology-and-cardiovascular-function-in-rheumatoid-arthritis
#19
Oore-Ofe O Olumuyiwa-Akeredolu, Prashilla Soma, Antoinette V Buys, Legesse Kassa Debusho, Etheresia Pretorius
The inflammatory burden of the complex rheumatoid arthritis (RA) disease affects several organ-systems, including rheological properties of blood and its formed elements. Red blood cells (RBCs) are constantly exposed to circulating dysregulated inflammatory molecules that are co-transported within the vasculature; and their membranes may be particularly vulnerable to the accompanying oxidative stress. In the current study, we investigate biophysical and ultrastructural characteristics of RBCs obtained from a cohort of patients using atomic force microscopy (AFM), scanning electron microscopy (SEM) and confocal microscopy (CM)...
December 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28901247/effect-on-morphology-osmotic-fragility-and-electro-kinetic-potential-of-erythrocytes-in-hypertension
#20
Swati Sanjay Gaikwad, J G Avari
BACKGROUND: Hypertension is a common health problem concerning a large proportion of population and a leading global risk factor for the burden of cardiovascular disease (CVD). The purpose of this study was to assess the efficacy of the erythrocyte zeta potential as a potential additional indicator for cardiovascular disorder risk so that patients with this can be more rapidly identified and treated. METHODS: In the present study, blood samples were collected in 5% dextrose solution from patients suffering from hypertension and healthy volunteers (Not taken any medication)...
September 11, 2017: Current Hypertension Reviews
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