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Rheological alterations produced during the storage of human erythrocytes were studied by means of in vitro viscoelastic parameters. Weekly aliquots of packed red blood cells (PRBC) and whole blood (WB) stored in CPD-adenine were studied for 35 days. Samples were analyzed in Erythrodeformeter both in stationary and oscillating regime. We found that(More)
A higher than normal glucose concentration in a suspending medium may produce non-enzymatic glycosylation of erythrocyte proteins. This process can modify the viscoelastic properties of erythrocytes. In this paper, we studied the possible relationship between glucose concentration in a suspending medium and erythrocyte rheological parameters. Human venous(More)
A new method to find directly complex viscoelastic parameters (CVP) of red blood cells (RBC) is presented in this paper. Experimental determinations were carried out in an Erythrodeformeter (Rasia et al., 1986) operating in oscillating mode (0.5 to 3.5 Hz). The Erythrodeformeter performs direct determination of CVP of erythrocytes undergoing sinusoidal(More)
Hypertension (HTA) and dyslipidemia (DLP) represent major risk factors for cardiovascular and cerebral-vascular ischemic disease. The mechanisms through which they can induce vascular damage are both metabolic and mechanical. Hemorheological alterations in HTA are result of changes affecting both red cell intrinsic structure and their interactions with the(More)
To mask the antigenic sites of cells for cell therapies, especially for blood transfusion, we investigated the hemocompatibility of two poly(2-(dimethylamino)ethyl methacrylate-co-poly(ethyleneglycol) compared with that of the homopolymer without PEG. Our strategy relies on the potential ability of these copolymers to self-assemble at the erythrocyte(More)
BACKGROUND The quantification of antigens and proteins on RBCs has been achieved by different approaches. Flow cytometry allows the results of the earliest studies to be to reappraised because it offers the possibility of measuring the immunofluorescence intensity of single cells and integrating the individual data of a large number of cells within a very(More)
Beta-thalassaemia is a hereditary hemolytic disease, in which each clinic phenotype encompasses a heterogenic group of genetic alterations resulting in beta-globin chain synthesis decrease or absence in red blood cells. Studies on beta-thalassaemia carriers suggest the existence of decreased red cell deformability. The erythrocyte deformability in the blood(More)
Spectral and multiphoton imaging is the preferred approach for non-invasive study allowing deeper penetration to image molecular processes in living cells. But currently available fluorescence microscopic techniques based on fluorescence intensity, such as confocal or multiphoton excitation, cannot provide detailed quantitative information about the dynamic(More)
Sodium caseinate (NaCAS) is a very useful ingredient in food industry because of its nutritional and functional properties. Acidification produces a gel structure as a result of the dissociation and aggregation of caseinic fractions. Formation of these protein gels can be made by the slow reduction of pH through the addition of glucono-delta-lactone (GDL).(More)
Phyllanthus sellowianus extracts have been used in Argentina since colonial times in the treatment of diabetes. The in vitro biorheological and hemoagglutinant action of different extracts of P. sellowianus bark on human erythrocytes (RBC) were studied. RBCs were incubated in vitro with four aqueous extracts: Maceration; Controlled Digestion (PD);(More)