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Cancer Res. 2000 Nov 15;60(22):6298-302.

Thymidine phosphorylase induces carcinoma cell oxidative stress and promotes secretion of angiogenic factors.

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Molecular Angiogenesis Laboratory, Imperial Cancer Research Fund, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, United Kingdom.


Thymidine phosphorylase (TP) (E.C., also known as platelet-derived endothelial cell growth factor, is a potent angiogenic factor. The expression of TP correlates with poor prognosis in a range of tumor types. 2-Deoxy-D-ribose-1-phosphate, a product of thymidine catabolism by TP, is a strongly reducing sugar that generates oxygen radical species during the early stages of protein glycation. We show that thymidine induces oxidative stress in TP-overexpressing carcinoma cells, promoting secretion of the stress-induced angiogenic factors vascular endothelial growth factor and interleukin-8, and inducing matrix metalloproteinase-1. Our findings outline a putative mechanism for TP-induced angiogenesis and identify novel targets for intervention.

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