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[Inhibitory effect of cyclin D1 antisense cDNA on human hepatocarcinoma cell line HepG2]
Zhen-yu Xiao1, Xiao-ping Chen, Zhi-yong Huang
1Center of Hepatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
Objective:
To investigate the effect of antisense cDNA of cyclin D1 on the cyclin D1 gene expression and cell proliferation of human hepatocarcinoma HepG2 cells in vitro.
Methods:
Plasmids containing cyclin D1 antisense cDNA were constructed and transfected into HepG2 cells. Their effects on cell proliferation were examined by MTT method, RT-PCR, immunohistochemical means, and flow cytometry.
Results:
Cyclin D1 antisense cDNA significantly inhibited the growth of HepG2 cells. The inhibition peaked at 48 hour after transfection by MTT method. RT-PCR analysis showed that cyclin D1 antisense cDNA down-regulated cyclin D1 at the mRNA levels. Expression level of cyclin D1 protein was also decreased as shown by immunohistochemical studies. Cell-cycle analysis by flow cytometry showed that transfected HepG2 cells were arrested at the G1 phase of the cell cycle.
Conclusions:
Our data suggest that cyclin D1 antisense cDNA could specifically inhibit the expression of cyclin D1 mRNA and protein and regulate cell cycle and cell proliferation of HepG2 cells. Cyclin D1 antisense cDNA may serve as a potential antitumor strategy in regulating cell-cyclin treating advanced HCCs.
Insights
Antisense cyclin D1 cDNA inhibits human hepatocarcinoma HepG2 cell proliferation by down-regulating cyclin D1 gene expression. This approach offers a potential strategy for treating advanced hepatocellular carcinoma (HCC).
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Context:
- Hepatocellular carcinoma (HCC) is a significant global health concern.
- Cyclin D1 plays a crucial role in cell cycle regulation and is often dysregulated in cancers.
- Targeting specific genes like cyclin D1 presents a potential therapeutic avenue.
Purpose:
- To investigate the efficacy of antisense cDNA targeting cyclin D1 in inhibiting HepG2 cell proliferation.
- To elucidate the molecular mechanisms by which cyclin D1 antisense cDNA affects gene expression and cell cycle progression.
Summary:
- Antisense cyclin D1 cDNA was introduced into human hepatocarcinoma HepG2 cells.
- Transfection resulted in significant inhibition of cell proliferation, with effects observed at both mRNA and protein levels of cyclin D1.
- Flow cytometry revealed cell cycle arrest at the G1 phase in transfected cells.
Impact:
- Cyclin D1 antisense cDNA demonstrates specific inhibition of cyclin D1 expression and HepG2 cell proliferation.
- This strategy holds promise as a potential antitumor approach for advanced HCC by regulating cell cycle progression.
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