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- W2019426369 abstract "Previous findings suggest that both the Tat polypeptide encoded by HIV-1 and Tat-derived peptides can induce angiogenesis via activation of the KDR receptor for Vascular Endothelial Growth Factor (VEGF). We identified 20 amino acids and 12 amino acid peptides corresponding to the cysteine-rich and basic domains of HIV-1 Tat which inhibited (125)I-VEGF(165) binding to KDR and neuropilin-1 (NP-1) receptors in endothelial cells. Cysteine-rich and basic Tat peptides inhibited VEGF-induced ERK activation and mitogenesis in endothelial cells, and inhibited angiogenesis in vitro at concentrations similar to those which inhibited VEGF receptor binding. These peptides also inhibited proliferation, angiogenesis, and ERK activation induced by basic fibroblast growth factor with similar potency and efficacy. Surprisingly, we found that both cysteine-rich and basic domain Tat peptides strikingly induced apoptosis in endothelial cells, independent of their effects on VEGF and bFGF. Furthermore, we found no evidence for direct biological effects of recombinant Tat on VEGF receptor binding, ERK activation, endothelial cell survival, or mitogenesis. These findings demonstrate novel properties of Tat-derived peptides and indicate that their major effect in endothelial cells is apoptosis independent of specific inhibition of VEGF receptor activation." @default.
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- W2019426369 date "2001-05-01" @default.
- W2019426369 modified "2023-09-29" @default.
- W2019426369 title "Cysteine-Rich and Basic Domain HIV-1 Tat Peptides Inhibit Angiogenesis and Induce Endothelial Cell Apoptosis" @default.
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- W2019426369 doi "https://doi.org/10.1006/bbrc.2001.4790" @default.
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