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Identification and validation of candidate Myb target genes
P A Bartley1, J K Lutwyche, T J Gonda
1Hanson Centre for Cancer Research, Division of Human Immunology, Institute of Medical and Veterinary Science, Frome Road, Adelaide, SA, 5000, Australia.
Blood Cells, Molecules & Diseases
|March 22, 2001
Summary
Myb oncogene activity has minimal impact on c-myc expression in myeloid cells; cytokine signaling is the primary driver. New methods identified additional Myb target genes, including myeloperoxidase.
Area of Science:
- Molecular Biology
- Oncology
- Cell Biology
Background:
- Myb oncogenes are implicated in cellular transformation, but their specific target genes remain largely uncharacterized.
- Identifying true Myb targets is crucial for understanding oncogenesis and developing targeted therapies.
Purpose of the Study:
- To investigate the role of Myb in regulating c-myc expression in myeloid cells.
- To identify novel Myb target genes using advanced screening techniques.
Main Methods:
- Utilized a conditionally Myb-transformed myeloid cell line (ERMYB).
- Employed PCR-based subtractive hybridization and low-density cDNA array screening.
- Analyzed gene expression in response to Myb activity and cytokine (GM-CSF) stimulation.
Main Results:
- Cytokine (GM-CSF) signaling, not Myb activity, was the predominant regulator of c-myc expression.
- Identified several candidate Myb target genes, including myeloperoxidase, which possesses known Myb-binding sites.
Conclusions:
- Myb's direct role in regulating c-myc in this context is limited.
- The study presents a robust methodology for identifying Myb target genes in myeloid cells, advancing the understanding of Myb-driven oncogenesis.