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TEL/ETV6 induces apoptosis in 32D cells through p53-dependent pathways
Tetsuya Yamagata1, Kazuhiro Maki, Kazuo Waga
1Department of Hematology, Dokkyo Medical University School of Medicine, Tochigi 321-0293, Japan.
TEL transcription factor overexpression suppresses myeloid cell proliferation and induces apoptosis by activating the p53 pathway. This suggests a tumor suppressive role for TEL in myelopoiesis.
Area of Science:
- Hematology
- Molecular Biology
- Cancer Biology
Background:
- TEL is an ETS family transcription factor essential for hematopoietic stem cell maintenance.
- Understanding TEL's role in myeloid cell development is crucial for hematological research.
Purpose of the Study:
- To investigate the function of TEL in myeloid proliferation and differentiation.
- To elucidate the molecular mechanisms underlying TEL's effects on myeloid cells.
Main Methods:
- Overexpression of TEL cDNA in mouse myeloid 32Dcl3 cells.
- Analysis of cell cycle progression, apoptosis induction, and p53 pathway activation.
- Assessment of p53 protein levels, DNA binding, and target gene expression (p21, Puma).
Main Results:
- TEL overexpression inhibited interleukin-3-dependent proliferation by blocking cell cycle progression.
- TEL triggered apoptosis via the mitochondrial pathway upon exposure to granulocyte colony-stimulating factor.
- TEL enhanced p53 protein levels, DNA binding, and transcription through p53-responsive elements, increasing p21 and Puma expression.
Conclusions:
- TEL exhibits tumor suppressive functions by augmenting the p53 pathway.
- TEL plays a role in facilitating normal myelopoiesis.
- Targeting the TEL-p53 axis may offer therapeutic strategies for myeloid malignancies.
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