4.7 Review

PECAM-1: Conflicts of interest in inflammation

Journal

LIFE SCIENCES
Volume 87, Issue 3-4, Pages 69-82

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.lfs.2010.06.001

Keywords

PECAM-1; CD31; Adhesion molecules; Inflammation

Funding

  1. Midwest Affiliate of the American Heart Association [0810167Z]
  2. National Heart, Lung, and Blood Institute of the National Institutes of Health [HL-40926]

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Platelet endothelial cell adhesion molecule-1 (PECAM-1. CD31) is a cell adhesion and signaling receptor that is expressed on hematopoietic and endothelial cells. PECAM-1 is vital to the regulation of inflammatory responses, as it has been shown to serve a variety of pro-inflammatory and anti-inflammatory functions. Pro-inflammatory functions of PECAM-1 include the facilitation of leukocyte transendothelial migration and the transduction of mechanical signals in endothelial cells emanating from fluid shear stress. Anti-inflammatory functions include the dampening of leukocyte activation, suppression of pro-inflammatory cytokine production, and the maintenance of vascular barrier integrity. Although PECAM-1 has been well-characterized and studied, the mechanisms through which PECAM-1 regulates these seemingly opposing functions, and how they influence each other, are still not completely understood. The purpose of this review, therefore, is to provide an overview of the pro- and anti-inflammatory functions of PECAM-1 with special attention paid to mechanistic insights that have thus far been revealed in the literature in hopes of gaining a clearer picture of how these opposing functions might be integrated in a temporal and spatial manner on the whole organism level. A better understanding of how inflammatory responses are regulated should enable the development of new therapeutics that can be used in the treatment of acute and chronic inflammatory disorders. (c) 2010 Elsevier Inc. All rights reserved.

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