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Updated: Aug 1, 2026

Cell Death Associated with Abnormal Mitosis Observed by Confocal Imaging in Live Cancer Cells
Published on: August 21, 2013
PRIMA-1(MET) induces nucleolar accumulation of mutant p53 and PML nuclear body-associated proteins
N Rökaeus1, G Klein, K G Wiman
1Department of Oncology-Pathology, Karolinska Institute, Cancer Center Karolinska (CCK), Karolinska University Hospital, Stockholm, Sweden.
Abstract:
We have previously identified PRIMA-1, a low molecular weight compound that restores the transcriptional transactivation function to mutant p53 and induction of apoptosis. To explore the molecular mechanism for PRIMA-1-induced mutant p53-dependent apoptosis, we examined the intracellular distribution of mutant p53 upon treatment with PRIMA-1(MET) by immunofluorescence staining. We found that PRIMA-1(MET) induced nucleolar translocation of mutant p53 and the promyelocytic leukemia (PML) nuclear body-associated proteins PML, CBP and Hsp70. Levels of Hsp70 were significantly enhanced by PRIMA-1(MET) treatment. PRIMA-Dead, a compound structurally related to PRIMA-1 but unable to induce mutant p53-dependent apoptosis, failed to induce nucleolar translocation of mutant p53. Our results suggest that redistribution of mutant p53 to nucleoli plays a role in PRIMA-1-induced apoptosis.
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