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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
The adaptor protein p66Shc is a positive regulator in the angiogenic response induced by hypoxic T cells.
Immune cells play an important role in the onset of angiogenesis.Here, we report that VEGF represents the major proangiogenic factor expressed by T cells exposed to hypoxia, a common feature of inflammation and tumor microenvironment.The supernatants of hypoxic T cells were highly angiogenic when delivered on the chick embryo CAM.The angiogenic response was abrogated by a neutralizing anti-VEGF antibody and mimicked by rVEGF.Interestingly, VEGF induction by hypoxia was up-regulated in Jurkat T cells overexpressing the adaptor protein p66Shc but not the inactive S36 p66Shc mutant, and it was abolished in p66Shc-/- mouse splenocytes.Accordingly, the angiogenic response induced by the supernatants from hypoxic p66Shc-/- splenocytes was reduced dramatically when compared with the wild-type controls.In conclusion, hypoxic T cells may contribute to the onset of angiogenesis through a novel VEGF-mediated mechanism, where p66Shc acts as a positive regulator.[1]
