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Oncogenic signal transduction and therapeutic strategy for hepatocellular carcinoma
Shinji Tanaka1, Keishi Sugimachi, Shin-ichiro Maehara
1Department of Surgery and Science, Graduate School of Medical Sciences and Station for Collaborative Research, Kyushu University, Fukuoka, Japan.
Abstract:
Discoveries of oncogenic signaling molecules lead to the comprehension of molecular mechanisms of tumor progression, as well as to the development of novel therapeutic tools for hepatocellular carcinoma. We have identified critical functions of intracellular signals transmitted from insulin-like growth factor and Wnt oncoprotein in carcinogenesis. The insulin-like growth factor system activates a number of signaling cascades resulting not only in hepatic mitogenesis, but also in cell survival. The secreted oncoprotein Wnt transforms beta-catenin potentials as a component of cell adhesion complexes with cadherins, into a transcription factor in the nucleus. Here, the important role of such signal transduction is reviewed, and we emphasize its control as a promising approach for the treatment of hepatocellular carcinoma.
Insights
This study reveals key roles for insulin-like growth factor and Wnt oncoprotein signaling in liver cancer development. Targeting these intracellular signals offers a promising new strategy for hepatocellular carcinoma treatment.
Area of Science:
- Oncology
- Molecular Biology
- Hepatology
Background:
- Oncogenic signaling molecules are crucial for understanding tumor progression.
- Novel therapeutic targets are needed for hepatocellular carcinoma (HCC).
Purpose of the Study:
- To review the critical functions of intracellular signals from insulin-like growth factor (IGF) and Wnt oncoprotein in carcinogenesis.
- To emphasize the control of these signal transduction pathways as a promising therapeutic approach for HCC.
Main Methods:
- Review of existing literature on IGF and Wnt signaling in HCC.
- Analysis of molecular mechanisms involving beta-catenin transformation and signaling cascades.
Main Results:
- The IGF system promotes hepatic mitogenesis and cell survival.
- Wnt oncoprotein signaling transforms beta-catenin into a nuclear transcription factor.
- Both IGF and Wnt pathways are critical in HCC development.
Conclusions:
- Intracellular signaling pathways involving IGF and Wnt are central to HCC progression.
- Targeting these specific molecular mechanisms presents a viable therapeutic strategy for HCC.