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Exogenous oxidants appear capable of initiating both proliferative and death signals, but the role of endogenous oxidants in either tumorigenesis or tumor suppression is unclear. We found that expression of the NAD(P)H oxidase adapter p47 phox was suppressed in human colon carcinoma specimens relative to adjacent normal colon. Overexpression of p47 phox ...
The HIV-1 accessory protein Tat has been found to exert profound effects on vascular cell behavior. Recently, Tat has been found to activate the c-Jun amino-terminal kinase (JNK1, SAPK) MAP kinase in lymphoid cells. We found that purified Tat rapidly activated JNK1 in human umbilical vein endothelial cells and ECV-304 cells, and coculture of ECV-304 cells with Tat-transfected HeLa cells resulted in...
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