The Novel VEGF121-VEGF165 Fusion Attenuates Angiogenesis and Drug Resistance via Targeting VEGFR2-HIF-1α-VEGF165/Lon Signaling Through PI3K-AKT-mTOR Pathway.

Abstract:

:Anti-angiogenesis therapy is one major approach of cancer therapies nowadays. Unfortunately, anti-angiogenesis therapy targeting VEGF-A was recently stumbled by the drugresistance that results from adaptive mechanisms, such as intratumor hypoxia. To obtain a more efficient therapeutic response, we created and identified a novel chimeric fusion of VEGF121 and VEGF165, which was connected by Fc region of human IgG1 to enhance dimerization. We found that the treatment of VEGF121-VEGF165 chimeric protein reduces proliferation, migration, invasion, and tube formation in endothelial and/or cancer cells through competing VEGF165 homodimer in a paracrine and an autocrine manner. Furthermore, the fusion protein attenuated autocrine VEGFR2-HIF-1α-VEGF165/Lon signaling through PI3KAKT- mTOR pathway in cancer cells. In conclusion, our data demonstrated that the chimeric VEGF121-VEGF165 arrests the tube formation of endothelial cells and interferes with tumor cell growth, migration and invasion, suggesting that it could be a potential drug as an angiogenesis antagonist in cancer therapy. The VEGF121-VEGF165 targets not only paracrine angiogenic cascade of endothelial cells but also autocrine PI3K-AKT-mTOR-mediated VEGFR2-HIF-1α- VEGF165/Lon signaling that drives drug resistance in tumor cells. Our study will open up the patient opportunities to combat drug resistance to antiangiogenic therapy.

authors

Tsai JL,Lee YM,Pan CY,Lee AY

doi

10.2174/156800961603160206125352

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

275-86

issue

3

eissn

1568-0096

issn

1873-5576

pii

CCDT-EPUB-73524

journal_volume

16

pub_type

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