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Density, heterogeneity and deformability of red cells as markers of clinical severity in hereditary spherocytosis.

Abstract：

:Hereditary spherocytosis (HS) originates from defective anchoring of the cytoskeletal network to the transmembrane protein complexes of the red blood cell (RBC). Red cells in HS are characterized by membrane instability and reduced deformability and there is marked heterogeneity in disease severity among patients. To unravel this variability in disease severity, we analyzed blood samples from 21 HS patients with defects in ankyrin, band 3, α-spectrin or β-spectrin using red cell indices, eosin-5-maleimide binding, microscopy, the osmotic fragility test, Percoll density gradients, vesiculation and ektacytometry to assess cell membrane stability, cellular density and deformability. Reticulocyte counts, CD71 abundance, band 4.1 a:b ratio, and glycated hemoglobin were used as markers of RBC turnover. We observed that patients with moderate/severe spherocytosis have short-living erythrocytes of low density and abnormally high intercellular heterogeneity. These cells show a prominent decrease in membrane stability and deformability and, as a consequence, are quickly removed from the circulation by the spleen. In contrast, in mild spherocytosis less pronounced reduction in deformability results in prolonged RBC lifespan and, hence, cells are subject to progressive loss of membrane. RBC from patients with mild spherocytosis thus become denser before they are taken up by the spleen. Based on our findings, we conclude that RBC membrane loss, cellular heterogeneity and density are strong markers of clinical severity in spherocytosis.

journal_name

Haematologica

journal_title

Haematologica

authors

Huisjes R,Makhro A,Llaudet-Planas E,Hertz L,Petkova-Kirova P,Verhagen LP,Pignatelli S,Rab MAE,Schiffelers RM,Seiler E,van Solinge WW,Corrons JV,Kaestner L,Mañú-Pereira M,Bogdanova A,van Wijk R

doi

10.3324/haematol.2018.188151

subject

Has Abstract

pub_date

2020-01-31 00:00:00

pages

338-347

issue

2

eissn

0390-6078

issn

1592-8721

pii

haematol.2018.188151

journal_volume

105

pub_type

杂志文章

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