» Articles » PMID: 18922897

Transient Nutlin-3a Treatment Promotes Endoreduplication and the Generation of Therapy-resistant Tetraploid Cells

Overview
Journal Cancer Res
Specialty Oncology
Date 2008 Oct 17
PMID 18922897
Citations 40
Authors
Affiliations
Soon will be listed here.
Abstract

p53 Activity is controlled in large part by MDM2, an E3 ubiquitin ligase that binds p53 and promotes its degradation. The MDM2 antagonist Nutlin-3a stabilizes p53 by blocking its interaction with MDM2. Several studies have supported the potential use of Nutlin-3a in cancer therapy. Two different p53 wild-type cancer cell lines (U2OS and HCT116) treated with Nutlin-3a for 24 hours accumulated 2N and 4N DNA content, suggestive of G(1) and G(2) phase cell cycle arrest. This coincided with increased p53 and p21 expression, hypophosphorylation of pRb, and depletion of Cyclin B1, Cyclin A, and CDC2. Upon removal of Nutlin-3a, 4N cells entered S phase and re-replicated their DNA without an intervening mitotic division, a process known as endoreduplication. p53-p21 pathway activation was required for the depletion of Cyclin B1, Cyclin A, and CDC2 in Nutlin-3a-treated cells and for endoreduplication after Nutlin-3a removal. Stable tetraploid clones could be isolated from Nutlin-3a treated cells, and these tetraploid clones were more resistant to ionizing radiation and cisplatin-induced apoptosis than diploid counterparts. These data indicate that transient Nutlin-3a treatment of p53 wild-type cancer cells can promote endoreduplication and the generation of therapy-resistant tetraploid cells. These findings have important implications regarding the use of Nutlin-3a in cancer therapy

Citing Articles

Determinants of Aurora kinase B inhibitor sensitivity in small cell lung cancer.

Duan L, Maki C Transl Lung Cancer Res. 2024; 13(2):223-228.

PMID: 38496702 PMC: 10938090. DOI: 10.21037/tlcr-23-732.


What Are the Reasons for Continuing Failures in Cancer Therapy? Are Misleading/Inappropriate Preclinical Assays to Be Blamed? Might Some Modern Therapies Cause More Harm than Benefit?.

Mirzayans R, Murray D Int J Mol Sci. 2022; 23(21).

PMID: 36362004 PMC: 9655591. DOI: 10.3390/ijms232113217.


p52-ZER6: a determinant of tumor cell sensitivity to MDM2-p53 binding inhibitors.

Li W, Alfason L, Huang C, Tang Y, Qiu L, Miyagishi M Acta Pharmacol Sin. 2022; 44(3):647-660.

PMID: 35995868 PMC: 9958181. DOI: 10.1038/s41401-022-00973-9.


Resistance mechanisms to inhibitors of p53-MDM2 interactions in cancer therapy: can we overcome them?.

Haronikova L, Bonczek O, Zatloukalova P, Kokas-Zavadil F, Kucerikova M, Coates P Cell Mol Biol Lett. 2021; 26(1):53.

PMID: 34911439 PMC: 8903693. DOI: 10.1186/s11658-021-00293-6.


Persistent DNA damage signaling and DNA polymerase theta promote broken chromosome segregation.

Clay D, Bretscher H, Jezuit E, Bush K, Fox D J Cell Biol. 2021; 220(12).

PMID: 34613334 PMC: 8500225. DOI: 10.1083/jcb.202106116.


References
1.
Schwartz J, Murnane J, Weichselbaum R . The contribution of DNA ploidy to radiation sensitivity in human tumour cell lines. Br J Cancer. 1999; 79(5-6):744-7. PMC: 2362676. DOI: 10.1038/sj.bjc.6690119. View

2.
Hendrickson M, Madine M, Dalton S, Gautier J . Phosphorylation of MCM4 by cdc2 protein kinase inhibits the activity of the minichromosome maintenance complex. Proc Natl Acad Sci U S A. 1996; 93(22):12223-8. PMC: 37971. DOI: 10.1073/pnas.93.22.12223. View

3.
Galipeau P, Cowan D, Sanchez C, Barrett M, Emond M, Levine D . 17p (p53) allelic losses, 4N (G2/tetraploid) populations, and progression to aneuploidy in Barrett's esophagus. Proc Natl Acad Sci U S A. 1996; 93(14):7081-4. PMC: 38939. DOI: 10.1073/pnas.93.14.7081. View

4.
Ganem N, Pellman D . Limiting the proliferation of polyploid cells. Cell. 2007; 131(3):437-40. DOI: 10.1016/j.cell.2007.10.024. View

5.
Stewart Z, Leach S, Pietenpol J . p21(Waf1/Cip1) inhibition of cyclin E/Cdk2 activity prevents endoreduplication after mitotic spindle disruption. Mol Cell Biol. 1998; 19(1):205-15. PMC: 83879. DOI: 10.1128/MCB.19.1.205. View