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Adenoviral VEGF-C overexpression induces blood vessel enlargement, tortuosity, and leakiness but no sprouting angiogenesis in the skin or mucous membranes.

Identifieur interne : 009497 ( Main/Exploration ); précédent : 009496; suivant : 009498

Adenoviral VEGF-C overexpression induces blood vessel enlargement, tortuosity, and leakiness but no sprouting angiogenesis in the skin or mucous membranes.

Auteurs : Anne Saaristo [Finlande] ; Tanja Veikkola ; Berndt Enholm ; Maija Hytönen ; Johanna Arola ; Katri Pajusola ; Païvi Turunen ; Michael Jeltsch ; Marika J. Karkkainen ; Dontscho Kerjaschki ; Hansruedi Bueler ; Seppo Yl Herttuala ; Kari Alitalo [Finlande]

Source :

RBID : pubmed:12087065

Descripteurs français

English descriptors

Abstract

Vascular endothelial growth factors (VEGFs) and their receptors (VEGFRs) are important regulators of blood and lymphatic vessel growth and vascular permeability. The VEGF-C/VEGFR-3 signaling pathway is crucial for lymphangiogenesis, and heterozygous inactivating missense mutations of the VEGFR-3 gene are associated with hereditary lymphedema. However, VEGF-C can have potent effects on blood vessels because its receptor VEGFR-3 is expressed in certain blood vessels and because the fully processed form of VEGF-C also binds to the VEGFR-2 of blood vessels. To characterize the in vivo effects of VEGF-C on blood and lymphatic vessels, we have overexpressed VEGF-C via adenovirus- and adeno-associated virus-mediated transfection in the skin and respiratory tract of athymic nude mice. This resulted in dose-dependent enlargement and tortuosity of veins, which, along with the collecting lymphatic vessels were found to express VEGFR-2. Expression of angiopoietin 1 blocked the increased leakiness of the blood vessels induced by VEGF-C whereas vessel enlargement and lymphangiogenesis were not affected. However, angiogenic sprouting of new blood vessels was not observed in response to AdVEGF-C or AAV-VEGF-C. These results show that virally produced VEGF-C induces blood vessel changes, including vascular leak, but its angiogenic potency is much reduced compared with VEGF in normal skin.

DOI: 10.1096/fj.01-1042com
PubMed: 12087065


Affiliations:


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<term>Blood Vessels (anatomy & histology)</term>
<term>Blood Vessels (metabolism)</term>
<term>Capillary Permeability (drug effects)</term>
<term>Cell Line</term>
<term>Dependovirus (genetics)</term>
<term>Endothelial Growth Factors (genetics)</term>
<term>Endothelial Growth Factors (metabolism)</term>
<term>Genetic Vectors</term>
<term>Lymphatic System (growth & development)</term>
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<term>Membrane Glycoproteins (pharmacology)</term>
<term>Mice</term>
<term>Mice, Nude</term>
<term>Nasal Mucosa (blood supply)</term>
<term>Neovascularization, Physiologic</term>
<term>Receptor Protein-Tyrosine Kinases (metabolism)</term>
<term>Receptors, Growth Factor (metabolism)</term>
<term>Receptors, Vascular Endothelial Growth Factor</term>
<term>Skin (blood supply)</term>
<term>Skin (metabolism)</term>
<term>Transfection</term>
<term>Vascular Endothelial Growth Factor A</term>
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<term>Facteur de croissance endothéliale vasculaire de type C</term>
<term>Facteurs de croissance endothéliale (génétique)</term>
<term>Facteurs de croissance endothéliale (métabolisme)</term>
<term>Facteurs de croissance endothéliale vasculaire</term>
<term>Glycoprotéines membranaires (pharmacologie)</term>
<term>Lignée cellulaire</term>
<term>Lymphokines (génétique)</term>
<term>Muqueuse nasale ()</term>
<term>Néovascularisation physiologique</term>
<term>Peau ()</term>
<term>Peau (métabolisme)</term>
<term>Perméabilité capillaire ()</term>
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<term>Récepteurs aux facteurs de croissance endothéliale vasculaire</term>
<term>Récepteurs à activité tyrosine kinase (métabolisme)</term>
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<term>Souris nude</term>
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<term>Transfection</term>
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<term>Vaisseaux sanguins (métabolisme)</term>
<term>Vecteurs génétiques</term>
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<term>Lymphokines</term>
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<term>Receptor Protein-Tyrosine Kinases</term>
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<front>
<div type="abstract" xml:lang="en">Vascular endothelial growth factors (VEGFs) and their receptors (VEGFRs) are important regulators of blood and lymphatic vessel growth and vascular permeability. The VEGF-C/VEGFR-3 signaling pathway is crucial for lymphangiogenesis, and heterozygous inactivating missense mutations of the VEGFR-3 gene are associated with hereditary lymphedema. However, VEGF-C can have potent effects on blood vessels because its receptor VEGFR-3 is expressed in certain blood vessels and because the fully processed form of VEGF-C also binds to the VEGFR-2 of blood vessels. To characterize the in vivo effects of VEGF-C on blood and lymphatic vessels, we have overexpressed VEGF-C via adenovirus- and adeno-associated virus-mediated transfection in the skin and respiratory tract of athymic nude mice. This resulted in dose-dependent enlargement and tortuosity of veins, which, along with the collecting lymphatic vessels were found to express VEGFR-2. Expression of angiopoietin 1 blocked the increased leakiness of the blood vessels induced by VEGF-C whereas vessel enlargement and lymphangiogenesis were not affected. However, angiogenic sprouting of new blood vessels was not observed in response to AdVEGF-C or AAV-VEGF-C. These results show that virally produced VEGF-C induces blood vessel changes, including vascular leak, but its angiogenic potency is much reduced compared with VEGF in normal skin.</div>
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