Article (Périodiques scientifiques)
Erythrocyte sedimentation: Effect of aggregation energy on gel structure during collapse
Dasanna, Anil Kumar; Darras, Alexis; John, Thomas et al.
2022In Physical Review. E, 105 (2)
Peer reviewed vérifié par ORBi
 

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Résumé :
[en] The erythrocyte (or red blood cell) sedimentation rate (ESR) is commonly interpreted as a measure of cell aggregation and as a biomarker of inflammation. It is well known that an increase of fibrinogen concentration, an aggregation-inducing protein for erythrocytes, leads to an increase of the sedimentation rate of erythrocytes, which is generally explained through the formation and faster settling of large disjoint aggregates. However, many aspects of erythrocyte sedimentation conform well with the collapse of a particle gel rather than with the sedimentation of disjoint aggregates. Using experiments and cell-level numerical simulations, we systematically investigate the dependence of ESR on fibrinogen concentration and its relation to the microstructure of the gel-like erythrocyte suspension. We show that for physiological aggregation interactions, an increase in the attraction strength between cells results in a cell network with larger void spaces. This geometrical change in the network structure occurs due to anisotropic shape and deformability of erythrocytes and leads to an increased gel permeability and faster sedimentation. Our results provide a comprehensive relation between the ESR and the cell-level structure of erythrocyte suspensions and support the gel hypothesis in the interpretation of blood sedimentation.
Disciplines :
Physique
Auteur, co-auteur :
Dasanna, Anil Kumar;  Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
Darras, Alexis;  Experimental Physics, Saarland University, 66123 Saarbruecken, Germany
John, Thomas;  Experimental Physics, Saarland University, 66123 Saarbruecken, Germany
Gerhard, Gompper;  Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
Kaestner, Lars;  Experimental Physics, Saarland University, 66123 Saarbruecken, Germany ; Theoretical Medicine and Biosciences, Saarland University, 66424 Homburg, Germany
WAGNER, Christian  ;  University of Luxembourg > Department of Physics and Materials Science
Fedosov, Dmitry A.;  Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
Co-auteurs externes :
yes
Titre :
Erythrocyte sedimentation: Effect of aggregation energy on gel structure during collapse
Date de publication/diffusion :
2022
Titre du périodique :
Physical Review. E
ISSN :
2470-0045
eISSN :
2470-0053
Maison d'édition :
AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA, Inconnu/non spécifié
Volume/Tome :
105
Fascicule/Saison :
2
Peer reviewed :
Peer reviewed vérifié par ORBi
Commentaire :
Article
Disponible sur ORBilu :
depuis le 03 juillet 2023

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