| Angiopoietins in Angiogenesis. | |
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MedLine Citation:
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PMID: 22922303 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Tie-1 and Tie-2 tyrosine kinase receptors are expressed specifically on vascular endothelial cells and on a certain subtype of macrophages implicated in angiogenesis, thus, they have been a major focus of angiogenesis research. Tie-1 and Tie-2 are essential for vascular maturation during developmental, physiological and pathological angiogenesis. Angiopoietin 1 to 4 (Ang-1 to 4) have been identified as bona fide ligands of the Tie-2 receptor, while Tie-1 remains an orphan receptor which is able to heterodimerize with Tie-2 and to modulate Tie-2 signal transduction. The most exhaustively studied angiopoietins are Ang-1 and Ang-2. Ang-1 is a critical player in vessel maturation and it mediates migration, adhesion and survival of endothelial cells. Ang-2 disrupts the connections between the endothelium and perivascular cells and promotes cell death and vascular regression. Yet, in conjunction with VEGF, Ang-2 promotes neovascularization. Hence, angiopoietins exert crucial roles in the angiogenic switch during tumor progression, and increased expression of Ang-2 relative to Ang-1 in tumors correlates with poor prognosis. Its central role in the regulation of physiological and pathological angiogenesis makes the angiopoietin/Tie signaling pathway a therapeutically attractive target for the treatment of vascular disease and cancer. |
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Authors:
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Ernesta Fagiani; Gerhard Christofori |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-23 |
Journal Detail:
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Title: Cancer letters Volume: - ISSN: 1872-7980 ISO Abbreviation: Cancer Lett. Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-8-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7600053 Medline TA: Cancer Lett Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012. Published by Elsevier Ireland Ltd. |
Affiliation:
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Institute of Biochemistry and Genetics, Department of Biomedicine, University of Basel, Basel, Switzerland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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