Selective induction of cell cycle arrest and apoptosis in human prostate cancer cells through adenoviral transfer of the melanoma differentiation-associated −7 (mda-7)/interleukin-24 (IL-24) gene

We have previously reported that overexpression of the melanoma differentiation-associated gene -7 ( mda-7 ) using a replication-defective adenovirus (Ad-mda7), results in tumor-specific growth suppression and induction of apoptosis in wide variety of cancer cells. In the present study, we investiga...

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Veröffentlicht in:Cancer gene therapy 2005-03, Vol.12 (3), p.238-247
Hauptverfasser: Saito, Yuji, Miyahara, Ryo, Gopalan, Began, Litvak, Anya, Inoue, Satoshi, Shanker, Manish, Branch, Cynthia D, Mhashilkar, Abner M, Roth, Jack A, Chada, Sunil, Ramesh, Rajagopal
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container_end_page 247
container_issue 3
container_start_page 238
container_title Cancer gene therapy
container_volume 12
creator Saito, Yuji
Miyahara, Ryo
Gopalan, Began
Litvak, Anya
Inoue, Satoshi
Shanker, Manish
Branch, Cynthia D
Mhashilkar, Abner M
Roth, Jack A
Chada, Sunil
Ramesh, Rajagopal
description We have previously reported that overexpression of the melanoma differentiation-associated gene -7 ( mda-7 ) using a replication-defective adenovirus (Ad-mda7), results in tumor-specific growth suppression and induction of apoptosis in wide variety of cancer cells. In the present study, we investigated the antitumor activity of Ad-mda7 and the underlying mechanism in human prostate cancer cells and normal prostate epithelial cells. Overexpression of MDA-7 induced significant ( P =.001) suppression of cell growth and apoptosis in prostate cancer cells (DU 145, LNCaP, and PC-3). In normal prostate epithelial cells (PrEC) some degree of growth inhibition but not apoptosis was observed. However, the inhibitory effects in normal cells were less compared to tumor cells. Growth inhibitory effects were mediated by the intracellular and not by extracellular MDA-7 protein. Molecular effectors that are involved in Ad-mda7-mediated tumor killing included activation of the caspase cascade, and the induction of G2 phase cell cycle arrest through the inhibition of Cdc25C pathway. These results demonstrate the mechanisms by which Ad-mda7 exerts its antitumor activity in human prostate cancer cells. The antitumor activity combined with previously reported antiangiogenic and proimmune properties of Ad-mda7 can serve as a potential therapeutic agent for treatment of primary and disseminated prostate cancer.
doi_str_mv 10.1038/sj.cgt.7700780
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subjects Adenoviridae
Adenovirus
Analysis of Variance
Annexin A5 - metabolism
Antitumor activity
Apoptosis
Apoptosis - drug effects
Apoptosis - genetics
Biomedical and Life Sciences
Biomedicine
Care and treatment
Caspase
Cell cycle
Cell Cycle - drug effects
Cell Cycle - genetics
Cell Proliferation
Diagnosis
Epithelial cells
Flow Cytometry
G2 phase
Gene Expression
Gene Expression Regulation, Neoplastic - drug effects
Gene Therapy
Gene Transfer Techniques
Genes, Tumor Suppressor
Genetic aspects
Genetic Therapy - methods
Genetic Vectors
Humans
Immunoblotting
Interleukin 24
Interleukins
Interleukins - genetics
Interleukins - pharmacology
Male
Mda-7 protein
Melanoma
original-article
Physiological aspects
Prostate cancer
Prostatic Neoplasms - therapy
Risk factors
Tumor cells
Tumor Cells, Cultured
title Selective induction of cell cycle arrest and apoptosis in human prostate cancer cells through adenoviral transfer of the melanoma differentiation-associated −7 (mda-7)/interleukin-24 (IL-24) gene
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