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Long noncoding RNA PVT1 promotes hepatoblastoma cell proliferation through activating STAT3
1Oncology Department, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, People's Republic of China.
Cancer Management and Research
|October 2, 2019
Summary
The long noncoding RNA PVT1 is upregulated in hepatoblastoma and promotes tumor cell proliferation by activating STAT3 signaling. This suggests PVT1 could be a therapeutic target for treating this common childhood liver cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Hepatoblastoma is the most frequent pediatric liver cancer.
- The role of the long noncoding RNA (IncRNA) PVT1 in hepatoblastoma is not well understood, despite its known oncogenic functions in other cancers.
Purpose of the Study:
- To investigate the regulatory mechanisms and functional significance of PVT1 in hepatoblastoma.
- To explore the potential of PVT1 as a therapeutic target.
Main Methods:
- Comparative analysis of PVT1 expression in hepatoblastoma tissues versus non-tumor tissues.
- In vitro cell proliferation assays (BrdU incorporation) and in vivo xenograft models.
- Gene expression analysis using qRT-PCR, Western blot, and immunohistochemistry; STAT3 pathway inhibition.
Main Results:
- PVT1 expression is significantly higher in hepatoblastoma tissues and cell lines compared to normal controls.
- PVT1 enhances hepatoblastoma cell proliferation in vitro and tumor growth in vivo.
- PVT1 activates the STAT3 pathway, leading to cell cycle progression; STAT3 inhibition abrogates PVT1's pro-proliferative effects.
Conclusions:
- PVT1 drives hepatoblastoma cell proliferation via STAT3-mediated cell cycle activation.
- PVT1 represents a promising therapeutic target for hepatoblastoma treatment.
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