Synergistic induction of profibrotic PAI-1 by TGF-β and radiation depends on p53.

Niemantsverdriet, Maarten; de Jong, Edwin; Langendijk, Johannes A; Kampinga, Harm H; Coppes, Robert P · Radiother Oncol · 2010

basic_science · Level V

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Abstract

Radiation-induced fibrosis is a severe side effect of radiotherapy. TGF-β and radiation synergistically induce expression of the profibrotic PAI-1 gene and this cooperation potentially involves p53. Here, we demonstrate that p53 is both indispensable and sufficient for the radiation effect inducing synergistic activation of PAI-1 by radiation and TGF-β.

Medical subject headings