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Updated: Jun 6, 2026
High-Efficiency Transduction of Liver Cancer Cells by Recombinant Adeno-Associated Virus Serotype 3 Vectors
Published on: March 22, 2011
Oncolytic adenovirus-mediated MDA-7/IL-24 overexpression enhances antitumor activity in hepatocellular carcinoma cell
Chao-Wen Xiao1, Xin-Bo Xue, Hui Zhang
1Department of General Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China.
Background:
Melanoma differentiation-associated gene-7 (MDA-7)/interleukin-24 (IL-24) is a novel tumor suppressor gene, which has suppressor activity in a broad spectrum of human cancer cells. We investigated the effect of the replication-competent oncolytic adenovirus SG600-IL24 and replication-incompetent adenovirus Ad.IL-24, both expressing human MDA-7/IL-24 on the hepatocellular carcinoma cell lines HepG2, Hep3B, SMMC-7721, HCCLM3, and the normal liver cell line L02.
Methods:
Hepatocellular carcinoma cell lines and the normal liver cell line were infected with SG600-IL24 and Ad.IL-24. The mRNA and protein expression of MDA-7/IL-24 in infected cells was confirmed by RT-PCR, ELISA, and Western blotting. MTT assay was used to investigate the proliferation effect. Hoechst staining and Annexin-V and PI staining were performed to study the MDA-7/IL-24 gene expressed in HCC cell lines and the normal liver cell line. Flow cytometry was used to analyse the cell cycle.
Results:
RT-PCR, ELISA and Western blotting confirmed that the exogenous MDA-7/IL-24 gene was highly expressed in cells infected with SG600-IL24. MTT and apoptosis detection indicated that SG600-IL24 induced growth suppression, promoted apoptosis, and blocked cancer cell lines in the G2/M phase in hepatocellular carcinoma cell lines but not in the normal liver cell line.
Conclusions:
SG600-IL24 selectively induces growth suppression and apoptosis in hepatocellular carcinoma cell lines in vitro but not in the normal liver cell line L02. Compared with Ad.IL-24, SG600-IL24 dramatically enhances antitumor activity in hepatocellular carcinoma cell lines.
Insights
The oncolytic adenovirus SG600-IL24 effectively suppresses hepatocellular carcinoma cell growth and induces apoptosis. This novel therapy shows selective antitumor activity, sparing normal liver cells.
Area of Science:
- Oncology
- Gene Therapy
- Molecular Biology
Background:
- Melanoma differentiation-associated gene-7 (MDA-7)/interleukin-24 (IL-24) is a tumor suppressor gene with broad-spectrum anticancer activity.
- Hepatocellular carcinoma (HCC) remains a significant global health challenge, necessitating novel therapeutic strategies.
Purpose of the Study:
- To evaluate the efficacy of replication-competent oncolytic adenovirus SG600-IL24 and replication-incompetent adenovirus Ad.IL-24, both expressing MDA-7/IL-24, against HCC cell lines.
- To compare the antitumor effects of SG600-IL24 and Ad.IL-24 in vitro.
Main Methods:
- HCC cell lines (HepG2, Hep3B, SMMC-7721, HCCLM3) and normal liver cells (L02) were infected with SG600-IL24 and Ad.IL-24.
- Gene expression was confirmed via RT-PCR, ELISA, and Western blotting. Cell proliferation and apoptosis were assessed using MTT assays, Hoechst, and Annexin-V/PI staining. Cell cycle analysis was performed by flow cytometry.
Main Results:
- SG600-IL24 demonstrated high expression of exogenous MDA-7/IL-24 in infected cells.
- SG600-IL24 significantly inhibited proliferation, induced apoptosis, and caused G2/M phase arrest in HCC cell lines.
- These effects were not observed in the normal liver cell line L02.
Conclusions:
- SG600-IL24 exhibits selective in vitro antitumor activity against HCC cell lines by inducing growth suppression and apoptosis.
- SG600-IL24 significantly enhances antitumor efficacy in HCC compared to Ad.IL-24.
