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Red Blood Cell Surface Receptor Expression of BCAM/Lu is Regulated by Protein Kinase A Activity

[+] Author Affiliations
J. L. Maciaszek, G. Lykotrafitis

University of Connecticut, Storrs, CT

B. Andemariam

University of Connecticut Health Center, Farmington, CT

Paper No. SBC2013-14311, pp. V01AT17A011; 2 pages
  • ASME 2013 Summer Bioengineering Conference
  • Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments
  • Sunriver, Oregon, USA, June 26–29, 2013
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5560-7
  • Copyright © 2013 by ASME


Irregular sickle red blood cells (RBCs) can contribute to the pathogenesis of vasoocclusion and other complications of sickle cell disease (SCD) via abnormal adherence to the vascular endothelium. It has previously been demonstrated that epinephrine enhances SCD RBC adhesion by activating the BCAM/Lu and ICAM-4 surface receptors [1–2]. Epinephrine acts on the RBC β2-adrenergic receptor, thereby activating Gas proteins that stimulate adenylyl cyclase (AC). This enzyme catalyzes the conversion of adenosine triphosphate (ATP) to cyclic adenosine monophosphate (cAMP), leading to protein kinase A (PKA) activation, an intermediate step in the upregulation of BCAM/Lu and ICAM-4 mediated adhesion. The interaction of BCAM/Lu with the α5 chain of laminin may contribute to vaso-occlusive events in SCD due to overexpression of BCAM on SCD RBCs.

Copyright © 2013 by ASME



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