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MISSION LentiPlex Pooled shRNA Library Screening in Mammalian Cells
Published on: December 21, 2011
Knockdown by shRNA identifies SLC44A5 as a potential therapeutic target in hepatocellular carcinoma
Gui-Zhu Peng1, Qi-Fa Ye1, Ren Wang1
1Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Wuhan, Hubei 430071, P.R. China.
Abstract:
Hepatocellular carcinoma (HCC) has been ranked the second leading cause of cancer‑associated mortality in China and the third leading cause of cancer‑associated mortality worldwide. A number of previous studies investigating SLC44A5 have revealed important biological insight and disease‑specific functions. Therefore, the present study investigated the expression of SLC44A5 in HCC tissues and cell lines, and assessed the effect of SLC44A5 on the viability, cell cycle, apoptosis and invasion of HCC cell lines. The mRNA expression of SLC44A5 in 35 HCC tissues was significantly higher compared with that in 35 normal tissues. The protein expression of SLC44A5 was notably high in MHCC‑97H and SMMC‑7721 cells compared with that in four other HCC cell lines. Knockdown of SLC44A5 using short hairpin RNA inhibited cell viability and arrested the cells in G1 of the cell cycle by reducing the expression of cell cycle markers, proliferating cell nuclear antigen and cyclin‑dependent kinase 2 in MHCC‑97H and SMMC‑7721 cells. Furthermore, SLC44A5 knockdown cells also exhibited cell apoptosis by reducing the expression levels of apoptosis markers, caspase‑3 and caspase‑9 in MHCC‑97H and SMMC‑7721 cells, and suppressed invasion. The present results suggested that SLC44A5 is involved in HCC carcinogenesis and progression in HCC, indicating that SLC44A5 may be a molecular target in cancer therapy.
Insights
High SLC44A5 expression correlates with hepatocellular carcinoma (HCC) progression. Silencing SLC44A5 inhibits HCC cell viability, proliferation, and invasion, suggesting it as a potential therapeutic target for HCC.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Hepatocellular carcinoma (HCC) is a major global cause of cancer mortality.
- Previous research indicates SLC44A5 has significant biological and disease-specific roles.
Purpose of the Study:
- To investigate SLC44A5 expression in HCC tissues and cell lines.
- To assess the impact of SLC44A5 on HCC cell viability, cell cycle, apoptosis, and invasion.
Main Methods:
- Analysis of SLC44A5 mRNA and protein expression in HCC tissues and cell lines.
- Short hairpin RNA (shRNA) mediated knockdown of SLC44A5 in MHCC-97H and SMMC-7721 cells.
- Assessment of cell viability, cell cycle progression, apoptosis, and invasion markers.
Main Results:
- SLC44A5 mRNA levels were significantly higher in HCC tissues than normal tissues.
- High SLC44A5 protein expression was observed in MHCC-97H and SMMC-7721 cells.
- SLC44A5 knockdown reduced cell viability, induced G1 cell cycle arrest, promoted apoptosis, and suppressed invasion.
Conclusions:
- SLC44A5 is implicated in the carcinogenesis and progression of HCC.
- SLC44A5 represents a potential molecular target for HCC therapy.
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