Local tissue distribution and cellular fate of vascular endothelial growth factor (VEGF) following intramuscular injection. 2010

Ann L Daugherty, and Randall J Mrsny
Department of Pharmaceutical Research and Development, Genentech, Inc., South San Francisco, CA, USA.

Vascular endothelial growth factor (VEGF) is an extracellular matrix (ECM)-binding growth factor capable of driving neovascularization. VEGF can potentially be applied clinically via intramuscular (IM) injection to correct local ischemia associated with peripheral artery disease (PAD). As interactions with ECM elements and cognate receptors at the site of an IM injection define the local biology of VEGF and previous studies have only focused on systemic distribution measurements, we have established a method to monitor the local VEGF distribution and fate. Fluorescent-labeled VEGF was prepared that bound to ECM and activated a cognate receptor similarly to VEGF. Beginning by 2 h and becoming complete by 12 h following injection, fluorescence microscopy demonstrated the transition of labeled VEGF from an initial extensive interaction with ECM components to a focused labeling of vascular endothelial cells. Biochemical characterization verified the association of VEGF with ECM components and modification of endothelial cell function associated with vascular permeability changes known to accompany VEGF actions. Our data provide information concerning temporal and spatial VEGF fate and actions at the site of an IM injection that can help guide decisions regarding the identification of acceptable formulation strategies.

UI MeSH Term Description Entries
D007273 Injections, Intramuscular Forceful administration into a muscle of liquid medication, nutrient, or other fluid through a hollow needle piercing the muscle and any tissue covering it. Intramuscular Injections,Injection, Intramuscular,Intramuscular Injection
D008856 Microscopy, Fluorescence Microscopy of specimens stained with fluorescent dye (usually fluorescein isothiocyanate) or of naturally fluorescent materials, which emit light when exposed to ultraviolet or blue light. Immunofluorescence microscopy utilizes antibodies that are labeled with fluorescent dye. Fluorescence Microscopy,Immunofluorescence Microscopy,Microscopy, Immunofluorescence,Fluorescence Microscopies,Immunofluorescence Microscopies,Microscopies, Fluorescence,Microscopies, Immunofluorescence
D010539 Permeability Property of membranes and other structures to permit passage of light, heat, gases, liquids, metabolites, and mineral ions. Permeabilities
D004730 Endothelium, Vascular Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components. Capillary Endothelium,Vascular Endothelium,Capillary Endotheliums,Endothelium, Capillary,Endotheliums, Capillary,Endotheliums, Vascular,Vascular Endotheliums
D005109 Extracellular Matrix A meshwork-like substance found within the extracellular space and in association with the basement membrane of the cell surface. It promotes cellular proliferation and provides a supporting structure to which cells or cell lysates in culture dishes adhere. Matrix, Extracellular,Extracellular Matrices,Matrices, Extracellular
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor
D014018 Tissue Distribution Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios. Distribution, Tissue,Distributions, Tissue,Tissue Distributions
D017207 Rats, Sprague-Dawley A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company. Holtzman Rat,Rats, Holtzman,Sprague-Dawley Rat,Rats, Sprague Dawley,Holtzman Rats,Rat, Holtzman,Rat, Sprague-Dawley,Sprague Dawley Rat,Sprague Dawley Rats,Sprague-Dawley Rats

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