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Myc/miR-378/TOB2/cyclin D1 functional module regulates oncogenic transformation
1Department of Cancer Biology and Pharmacology, Genome Institute of Singapore, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore.
Oncogene
|January 19, 2011
Summary
This study identifies microRNA-378 (miR-378) as a novel c-Myc target that promotes cellular transformation by inhibiting TOB2, linking Myc and Ras signaling pathways.
Area of Science:
- Oncology
- Molecular Biology
- Gene Regulation
Background:
- c-Myc is a transcription factor driving cellular transformation through a complex transcriptional program.
- While many c-Myc targets exist, few are functionally validated in c-Myc-driven transformation.
- Understanding novel targets and pathways is crucial for cancer research.
Purpose of the Study:
- To identify novel microRNA (miRNA) targets of the c-Myc oncoprotein.
- To investigate the role of miR-378 in cellular transformation.
- To elucidate the molecular mechanism by which miR-378 contributes to oncogenesis.
Main Methods:
- Identification of miR-378 as a c-Myc target.
- Experimental validation of miR-378's role in cooperating with Ras or HER2 in cellular transformation.
- Mechanistic studies involving target validation (TOB2) and downstream effects on cyclin D1.
Main Results:
- miR-378 is identified as a novel c-Myc target.
- miR-378 cooperates with activated Ras or HER2 to promote cellular transformation.
- miR-378 inhibits the anti-proliferative protein TOB2, which represses cyclin D1.
Conclusions:
- miR-378 is a functional oncogenic miRNA target of c-Myc.
- The miR-378-TOB2-cyclin D1 axis represents a key functional module in cellular transformation.
- This module mediates crosstalk between Myc and Ras signaling pathways.
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