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TNF receptors--how they function and interact
1Department of Histology and Immunology, Medical University of Gdańsk, Poland.
Abstract:
Tumor necrosis factor (TNF) is a pleiotropic cytokine regulating various immune and inflammatory reactions. It induces cellular responses upon binding to specific cell surface receptors of two distinct molecular species--p55 and p75 TNF receptors (TNF-Rs). Cloning of the respective cDNAs and obtaining the receptor-specific molecular tools such a agonistic and blocking monoclonal antibodies, TNF muteins with exclusive ability to bind to only one receptor type, as well as generation of TNF-R mutants by site-directed mutagenesis enabled researchers to answer key questions of the biology of initial steps in the cascade of TNF signal transduction. The presented mini-review describes the mode of function of the two receptors and discusses the possible ways of interaction between them.
Insights
Tumor necrosis factor (TNF) is a key cytokine in immune responses. This review details how its two receptors, p55 and p75 TNF-Rs, function and interact to initiate cellular signaling.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Tumor necrosis factor (TNF) is a pleiotropic cytokine involved in immune and inflammatory processes.
- TNF exerts its effects by binding to two distinct cell surface receptors: p55 TNF receptor (TNF-R) and p75 TNF receptor (TNF-R).
Purpose of the Study:
- To review the functional mechanisms of p55 and p75 TNF receptors.
- To discuss potential interactions between the two TNF receptor types in signal transduction.
- To highlight advancements in understanding TNF signaling pathways.
Main Methods:
- Utilized cloned cDNAs for TNF receptors.
- Employed receptor-specific molecular tools, including agonistic and blocking monoclonal antibodies.
- Generated site-directed mutagenesis TNF-R mutants.
- Reviewed existing literature on TNF receptor function and interactions.
Main Results:
- Researchers can now investigate TNF receptor biology with greater specificity.
- Specific molecular tools enable the study of individual receptor functions.
- Insights into the initial steps of TNF signal transduction have been gained.
Conclusions:
- The distinct functions and potential interactions of p55 and p75 TNF receptors are crucial for TNF-mediated cellular responses.
- Advanced molecular tools have significantly improved the understanding of TNF signaling pathways.