Abstract:
:Interference with endothelial cell metabolism is a promising, yet unexploited strategy for angiogenesis inhibition. We reported that the glucose analogue 2-deoxy-D-glucose (2-DG) inhibits angiogenesis at significantly lower concentrations than those required for tumor cytotoxicity. Here, we found that hypersensitivity to 2-DG in endothelial cells is not associated with enhanced drug uptake compared with tumor cells, but with time-dependent, endothelial-selective inhibition of AKT and ERK phosphorylation. Downregulation of these critical survival pathways is shown to be due to 2-DG's interference with N-linked glycosylation, leading to alterations in VEGFR2 (and downstream signaling) as well as induction of endoplasmic reticulum (ER) stress, GSK3β activation, and apoptosis. In vivo, periocular administration of 2-DG in LHBETATAG mice was associated with significant reduction of newly formed (CD105(+)) tumor capillaries, ER stress (GRP 78 expression), and endothelial apoptosis (TUNEL). These findings uniquely link N-linked glycosylation inhibition, ER stress, and ERK/AKT downregulation in endothelial cells, and provide a novel drug development strategy to overcome resistance mechanisms to currently available antiangiogenic agents.
journal_name
Mol Cancer Therjournal_title
Molecular cancer therapeuticsauthors
Kovács K,Decatur C,Toro M,Pham DG,Liu H,Jing Y,Murray TG,Lampidis TJ,Merchan JRdoi
10.1158/1535-7163.MCT-14-0315subject
Has Abstractpub_date
2016-02-01 00:00:00pages
264-75issue
2eissn
1535-7163issn
1538-8514pii
1535-7163.MCT-14-0315journal_volume
15pub_type
杂志文章abstract::Clear cell renal cell carcinoma (CC-RCC) is a devastating disease with limited therapeutic options available for advanced stages. The objective of this study was to investigate HMG-CoA reductase inhibitors, also known as statins, as potential therapeutics for CC-RCC. Importantly, treatment with statins was found to be...
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journal_title:Molecular cancer therapeutics
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journal_title:Molecular cancer therapeutics
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pub_type: 杂志文章
doi:10.1158/1535-7163.MCT-09-0191
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journal_title:Molecular cancer therapeutics
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doi:
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journal_title:Molecular cancer therapeutics
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doi:
更新日期:2002-12-01 00:00:00
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