An alternative POLDIP3 transcript promotes hepatocellular carcinoma progression.
Xiao-Ning Liu1, Ji-Hang Yuan1, Tian-Tian Wang1
1Department of Medical Genetics, Second Military Medical University, No. 800 Xiang-Yin Road, Shanghai 200433, China.
Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|February 26, 2017
Summary
An alternative POLDIP3 transcript (POLDIP3-β) is upregulated in hepatocellular carcinoma (HCC), promoting cancer cell growth and migration. Targeting this specific POLDIP3 isoform offers a potential new therapy for HCC.
Area of Science:
- Molecular Biology
- Cancer Research
- Genetics
Background:
- Alternative splicing generates diverse protein isoforms with distinct functions.
- Splicing dysregulation is a key characteristic of cancer development.
- POLDIP3 regulates DNA replication and mRNA translation, and its isoforms may impact cancer progression.
Purpose of the Study:
- To investigate the expression and function of an alternative POLDIP3 transcript (POLDIP3-β) in hepatocellular carcinoma (HCC).
- To determine the role of POLDIP3-β in HCC cell proliferation, apoptosis, migration, and tumor growth.
- To compare the oncogenic potential of POLDIP3-β with the standard POLDIP3 transcript.
Main Methods:
- Quantitative analysis of POLDIP3-β expression in clinical HCC tissues.
- In vitro assays: cell viability, DNA synthesis, colony formation, apoptosis, migration, and wound healing.
- In vivo studies using xenograft models to assess tumor growth.
Main Results:
- POLDIP3-β was significantly upregulated in HCC tissues compared to adjacent noncancerous tissues.
- Overexpression of POLDIP3-β enhanced HCC cell proliferation, migration, and xenograft tumor growth.
- POLDIP3-β inhibited HCC cell apoptosis, with weaker effects observed for the standard POLDIP3 transcript.
Conclusions:
- The alternative POLDIP3-β transcript acts as a significant oncogene in hepatocellular carcinoma.
- POLDIP3-β promotes HCC progression through increased proliferation, migration, and reduced apoptosis.
- Targeting the POLDIP3-β isoform presents a promising therapeutic strategy for HCC treatment.
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