Published in:
Open Access
01-12-2015 | Research article
PRIMA-1MET induces death in soft-tissue sarcomas cell independent of p53
Authors:
Thomas Grellety, Audrey Laroche-Clary, Vanessa Chaire, Pauline Lagarde, Frédéric Chibon, Agnes Neuville, Antoine Italiano
Published in:
BMC Cancer
|
Issue 1/2015
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Abstract
Background
The aim of this study was to explore the efficacy and define mechanisms of action of PRIMA-1MET as a TP53 targeted therapy in soft-tissue sarcoma (STS) cells.
Methods
We investigated effects of PRIMA-1MET on apoptosis, cell cycle, and induction of oxidative stress and autophagy in a panel of 6 STS cell lines with different TP53 status.
Results
Cell viability reduction by PRIMA-1MET was significantly observed in 5 out of 6 STS cell lines. We found that PRIMA-1MET was capable to induce cell death not only in STS cells harboring mutated TP53 but also in TP53-null STS cells demonstrating that PRIMA-1MET can induce cell death independently of TP53 in STS cells. We identified an important role of reactive oxygen species (ROS), involved in PRIMA-1MET toxicity in STS cells leading to a caspase-independent cell death. ROS toxicity was associated with autophagy induction or JNK pathway activation which represented potential mechanisms of cell death induced by PRIMA-1MET in STS.
Conclusions
PRIMA-1MET anti-tumor activity in STS partly results from off-target effects involving ROS toxicity and do not deserve further development as a TP53-targeted therapy in this setting.