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Involvement of gp130/interleukin-6 receptor transducing component in interleukin-11 receptor
M Fourcin1, S Chevalier, J J Lebrun
1INSERM U 298, Laboratoire de biologie cellulaire, CHRU Angers, France.
European Journal of Immunology
|January 1, 1994
Summary
Interleukin-11 (IL-11) utilizes the gp130 protein for signaling, similar to IL-6. However, IL-11 binds to a distinct receptor component, not the IL-6 binding subunit gp80.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Interleukin-11 (IL-11) shares biological functions with Interleukin-6 (IL-6).
- Understanding the IL-11 receptor is crucial for elucidating its signaling pathways.
Purpose of the Study:
- To investigate the nature and functionality of the IL-11 receptor.
- To determine the role of gp130 and gp80 in IL-11 signaling.
Main Methods:
- Development of a proliferative assay using the human TF1 cell line.
- Utilized blocking monoclonal antibodies against gp130 and gp80.
- Analyzed transducing protein phosphorylation in response to IL-11 and IL-6.
Main Results:
- A blocking antibody against gp130 inhibited IL-11-induced proliferation.
- IL-11 triggered gp130 phosphorylation, similar to IL-6.
- An antibody against gp80 did not affect IL-11 signaling, and no competition between IL-6 and IL-11 was observed.
Conclusions:
- The IL-11 binding component is distinct from the gp80 subunit of the IL-6 receptor.
- IL-11 utilizes gp130 as a shared signal-transducing protein, classifying it within the IL-6 family of cytokines.