Epinephrine-induced Activation of LW-mediated Sickle Cell Adhesion and Vaso-occlusion in Vivo
Overview
Authors
Affiliations
Sickle red cell (SS RBC) adhesion is believed to contribute to the process of vaso-occlusion in sickle cell disease (SCD). We previously found that the LW RBC adhesion receptor can be activated by epinephrine to mediate SS RBC adhesion to endothelial alphavbeta3 integrin. To determine the contribution of LW activation to vaso-occlusive events in vivo, we investigated whether in vitro treatment of SS RBCs by epinephrine resulted in vaso-occlusion in intact microvasculature after RBC infusion into nude mice. Epinephrine enhanced human SS but not normal RBC adhesion to murine endothelial cells in vitro and to endothelium in vivo, promoting vaso-occlusion and RBC organ sequestration. Murine sickle RBCs also responded to epinephrine with increased adhesion to postcapillary endothelium in nude mice. Epinephrine-induced SS RBC adhesion, vaso-occlusion, and RBC organ trapping could be prevented by the beta-adrenergic receptor (beta-AR) antagonist, propranolol. Infusion of soluble recombinant LW also significantly reduced adhesion and vaso-occlusion. In addition, epinephrine-treated SS RBCs induced activation of murine leukocyte adhesion to endothelium as well. We conclude that LW activation by epinephrine via beta-AR stimulation can promote both SS RBC and leukocyte adhesion as well as vaso-occlusion, suggesting that both epinephrine and LW play potentially pathophysiological roles in SCD.
Mougin L, Riccetti M, Merlet A, Bartolucci P, Gellen B, Blervaque L Haematologica. 2024; 109(8):2628-2638.
PMID: 38572551 PMC: 11290513. DOI: 10.3324/haematol.2023.284474.
Intercellular adhesion molecule 4 and ischemic stroke: a two-sample Mendelian randomization study.
Sun L, Guo D, Jia Y, Shi M, Yang P, Wang Y Thromb J. 2023; 21(1):40.
PMID: 37041579 PMC: 10091569. DOI: 10.1186/s12959-023-00485-4.
Thrombo-Inflammation in COVID-19 and Sickle Cell Disease: Two Faces of the Same Coin.
Chiang K, Gupta A, Sundd P, Krishnamurti L Biomedicines. 2023; 11(2).
PMID: 36830874 PMC: 9953430. DOI: 10.3390/biomedicines11020338.
Advances in Microfluidics for Single Red Blood Cell Analysis.
Grigorev G, Lebedev A, Wang X, Qian X, Maksimov G, Lin L Biosensors (Basel). 2023; 13(1).
PMID: 36671952 PMC: 9856164. DOI: 10.3390/bios13010117.
An R, Man Y, Cheng K, Zhang T, Chen C, Wang F Br J Haematol. 2023; 201(3):552-563.
PMID: 36604837 PMC: 10121869. DOI: 10.1111/bjh.18616.