The in vitro interaction of the [65]and [6Ä]-stereoisomers of CHO-THFA with human RBCs was investigated in the (therapeutically comparable) concentration range from 1.0 to 12.5 ng/ml. Both compounds are bound to RBCs with a kRBC ranging from 0.13 to 0.75 for [65]-CHO-THFA and from 0.06 to 0.33 for [6/?]-CHO-THFA, respectively. The interaction of the [65]-form with RBCs is about two times higher...

AIM The aim of this study was to investigate the mechanisms of Cr(6+)-induced red blood cells (RBCs) damage. METHODS The effect of Cr(6+) exposure on RBCs was evaluated by hemolytic rate and blood gas assays. After exposure to 20 μM Cr(6+), the percentage of phosphatidylserine (PS)-exposing cells, intracellular Ca(2+), reactive oxygen species (ROS), and ATP levels were evaluated, and cell mor...

A recent study on malaria-infected human red blood cells (RBCs) has shown induced ion channel activity in the host cell membrane, but the questions of whether they are host- or parasite-derived and their molecular nature have not been resolved. Here we report a comparison of a malaria-induced anion channel with an endogenous anion channel in Plasmodium falciparum-infected human RBCs. Ion channe...

RBCs from four glucose-6-phosphate dehydrogenase (G6PD)-deficient (Mediterranean variant) subjects were studied during fava bean hemolysis. In the density-fractionated RBC calcium level, Ca2 -ATPase activity. reduced glutathione level. and ghost protein pattern were studied. In the bottom fraction, containing most heavily damaged RBCs, calcium level ranged from i43 to 244 smoI/L RBCs (healthy G...

BACKGROUND Alloimmunization to antigens on transfused red blood cells (RBCs) represents a major barrier to chronic transfusion. In extreme cases of multiple alloimmunization, clinicians may be faced with the decision of transfusing incompatible RBCs or risking death from lack of transfusion. The disastrous results of hemolytic transfusion reactions are well understood, and major pathways of cle...

Red blood cells (RBCs) during microcirculation, aging and storage, lose N-acetylneuraminic acid (NANA) and other biomaterials thereby altering cell structures, some properties and functions. Such cell damage very likely underlies the serious adverse effects of blood transfusion. However, a controversy has remained since 1961-1977 as to whether with aging, the RBCs, suffering loss of NANA, do ha...

Some fish viruses, such as piscine orthoreovirus and infectious Background salmon anemia virus, target red blood cells (RBCs), replicate inside them and induce an immune response. However, the roles of RBCs in the context of infectious pancreatic necrosis virus (IPNV) infection have not been studied yet. : Ex vivo rainbow trout RBCs were obtained from peripheral blood, Methods Ficoll purified ...

The Ca(2+)-sensitive K(+) channel of human red blood cells (RBCs) (Gardos channel, hIK1, hSK4) was implicated in the progressive densification of RBCs during normal senescence and in the mechanism of sickle cell dehydration. Saturating RBC Ca(2+) loads were shown before to induce rapid and homogeneous dehydration, suggesting that Gardos channel capacity was uniform among the RBCs, regardless of...

Band 3 aggregation in the plane of the red blood cell (RBC) membrane is postulated to be important in the pathophysiology of hemolysis of dense sickle and normal RBCs. We used the fluorescence photobleaching recovery and polarized fluorescence depletion techniques to measure the lateral and rotational mobility of band 3, glycophorins, and phospholipid analogues in membranes of density-separated...

Embryonic hematopoiesis starts via the generation of primitive red blood cells (RBCs) that satisfy the embryo's immediate oxygen needs. Although primitive RBCs were thought to retain their nuclei, recent studies have shown that primitive RBCs in mice enucleate in the fetal liver. It has been unknown whether human primitive RBCs enucleate, and what hematopoietic site might support this process. ...