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Published on: July 12, 2018
Silencing glypican-3 expression induces apoptosis in human hepatocellular carcinoma cells
Shiyuan Liu1, Yumin Li, Wei Chen
1The Second Hospital of Lanzhou University, Lanzhou 730030, Gansu, China.
Abstract:
Hepatocellular carcinoma (HCC) is one of the most common internal malignant tumors. Glypican-3 (GPC3) is involved in the biological and molecular events in the tumorigenesis of HCC. We used RNA interference to evaluate the molecular effects of GPC3 suppression at the translational level and demonstrated for the first time that GPC3 silencing results in a significant elevation of the Bax/Bcl-2 ratio, the release of cytochrome c from mitochondria and the activation of caspase-3. The results suggest that GPC3 regulates cell proliferation by enhancing the resistance to apoptosis through the dysfunction of the Bax/Bcl-2/cytochrome c/caspase-3 signaling pathway and therefore plays a critical role in the tumorigenesis of HCC. Thus, the knockdown of GPC3 should be further investigated as an attractive novel approach for the targeted gene therapy of HCC.
Insights
Glypican-3 (GPC3) promotes hepatocellular carcinoma (HCC) growth by inhibiting apoptosis. Silencing GPC3 triggers apoptosis, offering a potential new therapy for HCC.
Area of Science:
- Oncology
- Molecular Biology
- Gene Therapy
Background:
- Hepatocellular carcinoma (HCC) is a prevalent malignancy.
- Glypican-3 (GPC3) is implicated in HCC development and progression.
- Understanding GPC3's role in apoptosis is crucial for targeted therapies.
Purpose of the Study:
- To investigate the molecular impact of GPC3 suppression on HCC.
- To elucidate the role of GPC3 in regulating apoptosis signaling pathways in HCC.
- To assess the potential of GPC3 knockdown as a therapeutic strategy for HCC.
Main Methods:
- Utilized RNA interference (RNAi) to achieve GPC3 gene silencing.
- Evaluated molecular changes at the translational level post-GPC3 suppression.
- Assessed apoptosis-related markers including Bax/Bcl-2 ratio, cytochrome c release, and caspase-3 activation.
Main Results:
- GPC3 silencing led to a significant increase in the Bax/Bcl-2 ratio.
- Mitochondrial release of cytochrome c and activation of caspase-3 were observed.
- These findings indicate GPC3 knockdown induces apoptosis in HCC cells.
Conclusions:
- GPC3 promotes HCC cell proliferation by resisting apoptosis via the Bax/Bcl-2/cytochrome c/caspase-3 pathway.
- GPC3 plays a critical role in HCC tumorigenesis.
- Targeted knockdown of GPC3 presents a promising novel approach for HCC gene therapy.
