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Cancer Biol Ther. 2006;5(11):1502-10.

Enhanced specificity of the p53 family proteins-based adenoviral gene therapy in uterine cervical cancer cells with E2F1-responsive promoters.

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제1저자 이재정 · 교신저자 허대석

PMID 17012841 DOI 10.4161/cbt.5.11.3300 IF 5.7 혈액종양내과
소속 (1)
  1. Cancer Research Institute, Seoul National University Hospital, Seoul, Korea.

Abstract

p63 and p73, the p53 family proteins, are similar to p53 in many aspects: structural homology, transactivation of p53-downstream genes, and induction of apoptosis. Interestingly, they also differ from p53; in particular, they are not inhibited by viral oncoproteins such as HPV E6. This feature would be an advantage over p53 in HPV-associated cancers and therefore, we evaluated the therapeutic potentials of various p53 family proteins (p73alpha, p73beta, p63alpha and p63gamma) against HPV-infected cervical cancers. In clonogenic assay, exogenous expression of p73alpha, p73beta and p63gamma inhibited the colony formation of HPV-positive cervical cancer cells under G418- selection while p53 could not. Recombinant adenoviruses Ad/CMVp73alpha, Ad/CMVp73beta and Ad/CMVp63gamma induced potent apoptosis in all infected cervical cancers (CasKi, SiHa, HeLa, C33A, SNU682, SNU17, SNU1005, SNU703), irrespective of their HPV-infection status. Unfortunately however, Ad/CMVp73alpha, Ad/CMVp73beta, and Ad/CMVp63gamma inhibited also normal cells such as endothelial cells, fibroblasts, and keratinocytes thus, tumorspecific promoter was indispensable to the p53 family proteins-based therapy. Here we report a stringent tumor killing by p73beta in combination with ESM6, a synthetic promoter targeting the DNA tumor virusassociated cancers. Recombinant adenoviruses encoding p73beta by ESM6 (Ad/ESM6p73beta and Ad/ESM6p73bENH) expressed p73beta and induced apoptosis only in the cancer cells but not in normal cells. Collectively, we suggest that the p53 family proteins are potent therapeutic agents for HPV-associated uterine cervical cancers and ESM6 mediated expression of the p53 family proteins would be a safe and strong tumor targeting strategy.

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그 밖의 정보
출판 형태
Journal Article, Research Support, Non-U.S. Gov't
저널
Cancer biology & therapy · ISSN 1538-4047
전자 출판
2006-11-19
MeSH
Adenoviridae · Cell Line · Cell Line, Tumor · Cloning, Molecular · DNA Primers · E2F1 Transcription Factor / physiology · Female · Genes, p53* · Genetic Therapy / methods · Humans · Promoter Regions, Genetic* · Reverse Transcriptase Polymerase Chain Reaction · Uterine Cervical Neoplasms / genetics / therapy
Substances
DNA Primers · E2F1 Transcription Factor · E2F1 protein, human