Article ; Online: p28-Mediated Activation of p53 in G2-M Phase of the Cell Cycle Enhances the Efficacy of DNA Damaging and Antimitotic Chemotherapy.
2016 Volume 76, Issue 8, Page(s) 2354–2365
Abstract: p28 is an anionic cell-penetrating peptide of 28 amino acids that activates wild-type and mutated p53, leading subsequently to selective inhibition of CDK2 and cyclin A expression and G2-M cell-cycle arrest. In this study, we investigated the cytotoxic ... ...
Abstract | p28 is an anionic cell-penetrating peptide of 28 amino acids that activates wild-type and mutated p53, leading subsequently to selective inhibition of CDK2 and cyclin A expression and G2-M cell-cycle arrest. In this study, we investigated the cytotoxic effects of p28 treatment alone and in combination with DNA-damaging and antimitotic agents on human cancer cells. p28 enhanced the cytotoxic activity of lower concentrations (IC20-50) of DNA-damaging drugs (doxorubicin, dacarbazine, temozolamide) or antimitotic drugs (paclitaxel and docetaxel) in a variety of cancer cells expressing wild-type or mutated p53. Mechanistic investigations revealed that p28 induced a post-translational increase in the expression of wild-type or mutant p53 and p21, resulting in cell-cycle inhibition at the G2-M phase. The enhanced activity of these anticancer agents in combination with p28 was facilitated through the p53/p21/CDK2 pathway. Taken together, these results highlight a new approach to maximize the efficacy of chemotherapeutic agents while reducing dose-related toxicity. Cancer Res; 76(8); 2354-65. ©2016 AACR. |
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MeSH term(s) | Amino Acid Sequence ; Animals ; Antineoplastic Agents/pharmacology ; Cell Division ; Cell Line, Tumor ; Cell-Penetrating Peptides/chemistry ; Cell-Penetrating Peptides/physiology ; DNA Damage ; Dacarbazine/analogs & derivatives ; Dacarbazine/pharmacology ; Female ; G2 Phase ; Heterografts ; Male ; Mice, Nude ; Tumor Suppressor Protein p53/metabolism |
Chemical Substances | Antineoplastic Agents ; Cell-Penetrating Peptides ; TP53 protein, human ; Tumor Suppressor Protein p53 ; Dacarbazine (7GR28W0FJI) ; temozolomide (YF1K15M17Y) |
Language | English |
Publishing date | 2016--15 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 1432-1 |
ISSN | 1538-7445 ; 0008-5472 |
ISSN (online) | 1538-7445 |
ISSN | 0008-5472 |
DOI | 10.1158/0008-5472.CAN-15-2355 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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