Adenovirus Ad-p53AIP1-mediated gene therapy and its regulation of p53-MDM2 interactions.

Abstract:

:We generated replication-defective adenovirus Ad-p53AIP1 and studied its anti-tumor efficacy both in vitro and in vivo. We demonstrated that Ad-p53AIP1 infection elicited high levels of p53AIP1 expression in cancer cells. We also found that Ad-p53AIP1 expression induced marked apoptosis and cell cycle arrest in HepG2 cells. Moreover, Ad-p53AIP1 infection significantly inhibited the tumorigenesis of 4T1 mouse mammary cancer cells in vivo. In particular, we discovered that p53AIP1 overexpression up-regulated the protein levels of p53 in HepG2 cells, which was accompanied by down-regulation of MDM2 mRNA and protein, suggesting an interaction between MDM2 and p53 in p53AIP1-induced apoptosis and cell cycle arrest. Our data demonstrated the feasibility of Ad-p53AIP1-mediated cancer gene therapy. p53AIP1-induced up-regulation of p53 protein through MDM2 suggests that p53AIP1 gene therapy may be more advantageous in tumors expressing high levels of oncoprotein MDM2 or having a mutation in MDM2 inhibitor p16INK4.

journal_name

Exp Ther Med

authors

Jiang Y,Chen H,Jia H,Xu Y,Liu G,Wang Y,Yang X,Lu Y

doi

10.3892/etm_00000057

subject

Has Abstract

pub_date

2010-03-01 00:00:00

pages

363-368

issue

2

eissn

1792-0981

issn

1792-1015

pii

etm-01-02-0363

journal_volume

1

pub_type

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