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Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells
Published on: February 21, 2018
Oncostatin M and leukemia inhibitory factor trigger overlapping and different signals through partially shared
B Thoma1, T A Bird, D J Friend
1Department of Biochemistry, Immunex Corporation, Seattle, Washington 98101.
The Journal of Biological Chemistry
|February 25, 1994
Summary
Leukemia inhibitory factor (LIF) and oncostatin M (OSM) share a receptor, but OSM more potently activates signaling pathways like mitogen-activated protein kinases. Different receptors for OSM suggest distinct signaling events.
Area of Science:
- Cellular signaling pathways
- Cytokine receptor interactions
- Molecular biology
Background:
- Leukemia inhibitory factor (LIF) and oncostatin M (OSM) are cytokines with overlapping biological activities.
- Both LIF and OSM bind to the same receptor with high affinity.
- The precise signal transduction mechanisms for LIF and OSM remain unclear.
Purpose of the Study:
- To investigate the signal transduction pathways of LIF and OSM.
- To compare the potency of OSM and LIF in inducing cellular responses.
- To explore the role of different receptors in OSM signaling.
Main Methods:
- Analysis of mitogen-activated protein kinase (MAPK) activation.
- Assessment of biological responses.
- Investigation of tyrosine-phosphorylated protein patterns.
- Receptor binding assays.
Main Results:
- Mitogen-activated protein kinases are involved in both LIF and OSM signaling.
- OSM is a more potent inducer of MAPK activity and biological responses compared to LIF.
- A second OSM receptor, distinct from the LIF-binding receptor, was identified and correlates with OSM's potent effects.
- LIF and OSM stimulate different patterns of tyrosine-phosphorylated proteins.
Conclusions:
- The findings suggest that OSM can utilize distinct receptors to initiate different signal transduction events.
- OSM exhibits greater potency in activating signaling pathways and cellular responses than LIF.
- Understanding these differential signaling mechanisms is crucial for deciphering cytokine function.
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