dc.contributor.author | McNamee, Antony P | |
dc.contributor.author | Tansley, Geoff D | |
dc.contributor.author | Simmonds, Michael J | |
dc.date.accessioned | 2019-05-29T12:37:38Z | |
dc.date.available | 2019-05-29T12:37:38Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0026-2862 | |
dc.identifier.doi | 10.1016/j.mvr.2018.05.008 | |
dc.identifier.uri | http://hdl.handle.net/10072/380791 | |
dc.description.abstract | Circulation of blood depends, in part, on the ability of red blood cells (RBCs) to aggregate, disaggregate, and deform. The primary intrinsic disaggregating force of RBCs is derived from their electronegativity, which is largely determined by sialylated glycoproteins on the plasma membrane. Given supraphysiological shear exposure – even at levels below those which induce hemolysis – alters cell morphology, we hypothesized that exposure to supraphysiological and subhemolytic shear would cleave membrane-bound sialic acid, altering the electrochemical and physical properties of RBCs, and thus increase RBC aggregation. Isolated RBCs from healthy donors (n = 20) were suspended in polyvinylpyrrolidinone. Using a Poiseuille shearing system, RBC suspensions were exposed to 125 Pa for 1.5 s for three duty-cycles. Following the first and third shear duty-cycle, samples were assessed for: RBC aggregation; the ability of RBCs to aggregate independent of plasma (“aggregability”); disaggregation shear rate; membrane-bound sialic acid content, and; cell electrophoretic mobility. Initial shear exposure significantly increased RBC aggregation, aggregability, and the shear required for rouleaux dispersion. Sialic acid concentration significantly decreased on isolated RBC membranes ghosts, and increased in the supernatant following shear. Initial shear exposure decreased the electrophoretic mobility of RBCs, decreasing the electronegative charge from −15.78 ± 0.31 to −7.55 ± 0.21 mV. Three exposures to the shear duty-cycle did not further compound altered RBC measures. A single exposure to supraphysiological and subhemolytic shear significantly decreased the electrochemical charge of the RBC membrane, concurrently increasing cell aggregation/aggregability. The cascading implications of hyperaggregation appears to potentially explain the ischemia–associated complications commonly reported following mechanical circulatory support. | |
dc.description.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.publisher.place | United States | |
dc.relation.ispartofpagefrom | 1 | |
dc.relation.ispartofpageto | 7 | |
dc.relation.ispartofjournal | Microvascular Research | |
dc.relation.ispartofvolume | 120 | |
dc.subject.fieldofresearch | Clinical sciences | |
dc.subject.fieldofresearch | Clinical sciences not elsewhere classified | |
dc.subject.fieldofresearchcode | 3202 | |
dc.subject.fieldofresearchcode | 320299 | |
dc.title | Sublethal mechanical trauma alters the electrochemical properties and increases aggregation of erythrocytes | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
dcterms.license | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.description.version | Accepted Manuscript (AM) | |
gro.faculty | Griffith Health, School of Allied Health Sciences | |
gro.rights.copyright | © 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited. | |
gro.hasfulltext | Full Text | |
gro.griffith.author | Simmonds, Michael J. | |
gro.griffith.author | McNamee, Antony | |
gro.griffith.author | Tansley, Geoff | |