Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/29039
Title: Beta-Adrenoceptor Activation Reduces Both Dermal Microvascular Endothelial Cell Migration Via a cAMP-Dependent Mechanism and Wound Angiogenesis.
Authors: O'Leary, Andrew P.
Fox, James M.
Pullar, Christine E.
First Published: 1-Jul-2014
Publisher: Wiley-Blackwell
Citation: O'Leary, Andrew P., James M. Fox, and Christine E. Pullar. "Beta‐Adrenoceptor Activation Reduces Both Dermal Microvascular Endothelial Cell Migration Via a cAMP‐Dependent Mechanism and Wound Angiogenesis." Journal of cellular physiology (2014).
Abstract: Angiogenesis is an essential process during tissue regeneration; however, the amount of angiogenesis directly correlates with the level of wound scarring. Angiogenesis is lower in scar-free fetal wounds while angiogenesis is raised and abnormal in pathophysiological scarring such as hypertrophic scars and keloids. Delineating the mechanisms that modulate angiogenesis and could reduce scarring would be clinically useful. Beta-adrenoceptors (β-AR) are G protein-coupled receptors expressed on all skin cell-types. They play a role in wound repair but their specific role in angiogenesis is unknown. In this study, a range of in vitro assays (single cell migration, scratch wound healing, ELISAs for angiogenic growth factors and tubule formation) were performed with human dermal microvascular endothelial cells (HDMEC) to investigate and dissect mechanisms underpinning β-AR-mediated modulation of angiogenesis in chick chorioallantoic membranes (CAM) and murine excisional skin wounds. β-AR activation reduced HDMEC migration via cAMP-dependent and PKA-independent mechanisms as demonstrated through use of an EPAC agonist that auto-inhibited the cAMP-mediated β-AR transduced reduction in HDMEC motility; a PKA inhibitor was, conversely, ineffective. ELISA studies demonstrated that β-AR activation reduced pro-angiogenic growth factor secretion from HDMECs (fibroblast growth factor 2) and keratinocytes (vascular endothelial growth factor A) revealing possible β-AR-mediated autocrine and paracrine anti-angiogenic mechanisms. In more complex environments, β-AR activation delayed HDMEC tubule formation and decreased angiogenesis both in the CAM assay and in murine excisional skin wounds in vivo. β-AR activation reduced HDMEC function in vitro and angiogenesis in vivo; therefore, β-AR agonists could be promising anti-angiogenic modulators in skin.
DOI Link: 10.1002/jcp.24716
eISSN: 1097-4652
Links: http://hdl.handle.net/2381/29039
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: © 2014 Wiley Periodicals, Inc. This is the peer reviewed version of the following article: O'Leary, Andrew P., James M. Fox, and Christine E. Pullar. "Beta‐Adrenoceptor Activation Reduces Both Dermal Microvascular Endothelial Cell Migration Via a cAMP‐Dependent Mechanism and Wound Angiogenesis." Journal of cellular physiology (2014)., which has been published in final form at http://dx.doi.org/10.1002/jcp.24716
Appears in Collections:Published Articles, Dept. of Cell Physiology and Pharmacology

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