[Apoptosis and activity changes of telomerase induced by essential oil from pine needles in HepG2 cell line]
Feng-xiang Wei1, Mei-yu Li, Yu-hong Song
1Department of biology, Guangdong pharmaceutical university, Guangzhou 510006, China. haowei727499@163.com
Objective:
To study the effects of essential oil extracted from pine needles on HepG2 cell line.
Methods:
HepG2 cells were treated with essential oil extracted from pine needles. Cell growth rate was determined with MTF assay, cell morphologic changes were examined under transmission electromicroscope and HE straining. Flow cytometry was used to exmine apoptotic cells. Bcl-2 gene expression was determined by flow cytometry and telomerase activity by TRAP assay.
Results:
Essential oils from pine needles could not only repress the growth of HepG2 cells significantly, but also induce apoptosis to them. Both dose-effect and time-effect relationship could be confirmed. Typical morphology changes of apoptosis such as nuclear enrichment and karyorrhexis were observed through transmission electromicroscope and HE straining. Telomerase activity was down regulated in the essential oil extracted from pine needles induced apoptotic cells. The expression of bcl-2 gene was suppressed after the essential oil from pine needles treatement.
Conclusion:
The essential oil extracted from pine needles can inhibit cell growth of HepG2 cell line and induce apoptosis, which may associate with inhibition of telomerase activity and bcl-2 may be involved in the regulation of telomerase activity.
Insights
Pine needle essential oil inhibits HepG2 cell growth and induces apoptosis. This effect may involve downregulating telomerase activity and bcl-2 gene expression, offering potential therapeutic insights.
Area of Science:
- Phytochemistry
- Cell Biology
- Molecular Biology
Context:
- Hepatocellular carcinoma (HCC) remains a significant global health challenge.
- Exploring natural compounds for anticancer therapies is crucial.
- HepG2 cells are a widely used model for HCC research.
Purpose:
- To investigate the cytotoxic and apoptotic effects of pine needle essential oil on the HepG2 cell line.
- To elucidate the underlying molecular mechanisms, including telomerase activity and bcl-2 gene expression.
Summary:
- Pine needle essential oil significantly inhibited HepG2 cell proliferation in a dose- and time-dependent manner.
- Morphological analysis confirmed apoptosis induction, characterized by nuclear changes.
- Telomerase activity was downregulated, and bcl-2 gene expression was suppressed following treatment.
Impact:
- Demonstrates the potential of pine needle essential oil as a natural agent against HCC.
- Provides evidence for the role of telomerase and bcl-2 in mediating the oil's effects.
- Suggests a basis for further research into natural product-based cancer therapeutics.
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