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Molecular mechanisms induced by p53 reactivating molecules   Claudia Fiorini

Molecular mechanisms induced by p53 reactivating molecules

72 страниц. 2014 год.
Scholars' Press
TP53 gene mutations compromising p53 transcriptional function occur in more than 50% of human cancers, including pancreatic adenocarcinoma, and render cancer cells more resistant to conventional therapy. In the last few years, many efforts have been addressed to identify p53-reactivating molecules able to restore the wild-type transcriptionally competent conformation of the mutated proteins. In the present thesis, we show that two of these compounds, CP-31398 and RITA, can induce cell growth inhibition, apoptosis, and autophagy by activating p53/DNA binding and p53 phosphorylation (Ser15), without affecting the total amount of p53. These effects occur in both wild-type and mutant p53 (mutp53) pancreatic adenocarcinoma cell lines, whereas they are much less pronounced in normal human primary fibroblasts. Furthermore, CP-31398 and RITA regulate the axis SESN1- 2/AMPK/mTOR by inducing AMPK phosphorylation in Thr172, which has a crucial role in the autophagic response.Our results support...
 
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