Cited by 67Cancer-related Molecular PathwaysPancreatic and Hepatic Oncology ResearchPI3K/AKT/mTOR signaling in cancer

MDM2 inhibitor MI-319 in combination with cisplatin is an effective treatment for pancreatic cancer independent of p53 function

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Azmi, Asfar S., Aboukameel, Amro, Banerjee, Sanjeev, Wang, Zhiwei, Mohammad, Momin, Wu, Jack, Wang, Shaomeng, Yang, Dajun +3 more·2010·European Journal of Cancer

Abstract

Small molecule inhibitors (SMIs) of murine double minute 2 (MDM2) are known to restore the apoptotic and cell cycle regulatory functions of p53 by disrupting the MDM2-p53 interaction. In principle, these SMIs are not effective against tumours with mutation in the tumour suppressor p53 (mut-p53), which is known to be present in approximately 50% of all cancers. In this study we are reporting, for the first time, that MI-319 in combination with cisplatin induced cell growth inhibition and apoptosis in pancreatic cancer (PC) cells irrespective of their p53 mutational status. MI-319-cisplatin combination synergistically suppressed cell growth (MTT Combination Index [CI]<1) and colony formation (clonogenic assay) and induced apoptosis. Western blot analysis and siRNA silencing studies in mutant as well as p53 null cells highlighted a mechanism involving p73 which is also known to be under the regulation of MDM2, and unlike p53, it is rarely mutated in PC. Down-regulating MDM2 using siRNA enhanced p73 reactivation and increased cell death. Further, the combination effectively reduced tumour growth in both wt-p53 and mut-p53 tumour xenograft models (50% Capan-2 animals were tumour free). Consistent with our in vitro results, remnant tumour tissue analysis showed up-regulation of p73 and the cell cycle regulator p21. In conclusion, this study highlights a new role of MDM2 inhibitors in combination with cisplatin, and thus warrants further clinical investigation in human pancreatic tumours containing both wt-p53 and mut-p53.

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Crossref · 10.1016/j.ejca.2010.01.015

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  1. [13]Kaghad M Bonnet H Yang A Creancier L Biscan JC Valent A Monoallelically expressed gene related to p53 at 1p36, a region frequently deleted in neuroblastoma and other human cancers Cell 1997 90 4 809 819 9288759

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Authors
Azmi, A. S., Aboukameel, A., Banerjee, S., Wang, Z., Mohammad, M., Wu, J., Wang, S., Yang, D., Philip, P. A., Sarkar, F. H., & Mohammad, R. M.
Affiliations
  • Wayne State University (US)
  • University of Michigan (US)
Corresponding author
Mohammad, Ramzi M.
Venue
European Journal of Cancer
Publisher
Elsevier BV
Published
2010-04
Volume
46
Issue
6
Pages
1122-1131
ISSN
0959-8049 (ISSN-L)
OpenAlex
W2065016142
Cited by
67
References
48
Citations by year
2025: 2 · 2024: 2 · 2023: 5 · 2022: 1 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 1 · 2017: 3 · 2016: 6 · 2014: 6 · 2013: 9 · 2012: 6
FWCI
4.27
Type
journal article
Language
en
Open access
Locations
  • European Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA109389, R01CA101870, U19CA113317)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
MDM2 inhibitors, cisplatin, pancreatic cancer, TP53 mutation, p73, p21, apoptosis, combination therapy, p53-MDM2 interaction, tumor xenografts
MeSH terms
Tumor Protein p73, Animals, Antineoplastic Combined Chemotherapy Protocols, Cisplatin, DNA-Binding Proteins, Humans, Immunohistochemistry, Indoles, Nuclear Proteins, Pancreatic Neoplasms, Spiro Compounds, Gene Expression Regulation, Neoplastic, Tumor Suppressor Protein p53, Apoptosis, Tumor Suppressor Proteins, RNA, Small Interfering, Cell Line, Tumor, Cyclin-Dependent Kinase Inhibitor p21, Mice, Proto-Oncogene Proteins c-mdm2

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