MicroRNA-182 Promotes Cell Migration by Targeting Programmed Cell Death 4 in Hepatocellular Carcinoma Cells
Junwei Hu1,2, Zeyu Wang1, Jinjun Wang3
1Department of Gastroenterology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, People's Republic of China.
Purpose:
Hepatocellular carcinoma (HCC) is the most common primary liver tumor and the third greatest cause of cancer-related death worldwide. Programmed cell death 4 (PDCD4) was reported as a potential tumor-suppressor in hepatocarcinogenesis. However, relatively little is known about mechanisms that regulate PDCD4 expression in HCC. The aim of the present study is to investigate the expression of PDCD4 and miR-182 in human HCC cell lines and clinical HCC specimens and determine whether PDCD4 is a direct target of miR-182 in HCC cell lines.
Materials:
The expression of miR-182 and PDCD4 in human HCC cell lines and HCC tissues were examined using qRT-PCR and Western blot method. Transwell and wound healing assays were carried out to explore the influence of miR-182 on hepatoma cells migration. A luciferase reporter assay was conducted to confirm target association.
Results:
In our research, we found that PDCD4 was downregulated, whereas miR-182 was upregulated in liver cancer cell lines and HCC tissues. Transwell and wound healing assays illustrated that miR-182 contributed to migration activities of liver cancer cell lines. Loss or increase of miR-182 can lead to a negative expression of PDCD4 protein level. The luciferase reporter assay showed that PDCD4 is a direct target of miR-182.
Conclusion:
All these findings suggest that miR-182 may act as an oncogenic role in liver cancer cells by directly and negatively regulating expression of PDCD4.
Insights
MicroRNA-182 (miR-182) promotes liver cancer cell migration by downregulating the tumor suppressor programmed cell death 4 (PDCD4). This study confirms miR-182 targets PDCD4 in hepatocellular carcinoma.
Area of Science:
- Oncology
- Molecular Biology
- Hepatology
Background:
- Hepatocellular carcinoma (HCC) is a leading cause of cancer mortality globally.
- Programmed cell death 4 (PDCD4) is a known tumor suppressor in liver cancer.
- Mechanisms regulating PDCD4 expression in HCC remain largely unelucidated.
Purpose of the Study:
- Investigate PDCD4 and miR-182 expression in HCC.
- Determine if PDCD4 is a direct target of miR-182 in HCC cell lines.
- Elucidate the role of miR-182 in hepatocarcinogenesis.
Main Methods:
- Quantitative real-time PCR (qRT-PCR) and Western blotting for expression analysis.
- Transwell and wound healing assays to assess cell migration.
- Luciferase reporter assay to confirm direct target interaction.
Main Results:
- PDCD4 expression was downregulated, while miR-182 was upregulated in HCC cell lines and tissues.
- miR-182 significantly promoted migration of liver cancer cells.
- PDCD4 was confirmed as a direct target of miR-182, with inverse expression correlation.
Conclusions:
- miR-182 functions as an oncogene in HCC.
- miR-182 promotes liver cancer progression by directly downregulating PDCD4.
- Targeting the miR-182/PDCD4 axis may offer therapeutic strategies for HCC.
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