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Updated: Mar 31, 2026
Perspectives on Neuroscience
Published on: July 31, 2007
The cybernetics of TNF: Old views and newer ones
1Department of Biological Chemistry, The Weizmann Institute of Science, 76100 Rehovot, Israel.
Abstract:
The proinflammatory cytokine tumor necrosis factor (TNF) orchestrates complex multicellular processes through a wide variety of changes that it induces in cell functions. At various stages of the study of TNF, attention has been drawn to one of three different modes of its action. The work that led to the discovery of this cytokine addressed situations in which it inflicts massive damage to tissues through a mode of action that appeared to be unrestricted. In the years that followed, attention was drawn to the existence of negative feedback mechanisms that do restrict TNF formation and function, and of reciprocal mechanisms for negatively regulating TNF-induced gene activation and of cell death. Most recently, the discovery of the critical role of TNF in chronic inflammatory diseases directed attention to the ability of TNF also to act with no apparent time restriction. Major gaps still remain in our knowledge of the cellular and molecular basis for these three modes of TNF action.
Insights
Tumor necrosis factor (TNF) exhibits three distinct modes of action: unrestricted tissue damage, regulated feedback inhibition, and chronic inflammatory roles. Understanding the cellular basis of these TNF actions remains crucial.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Tumor necrosis factor (TNF) is a proinflammatory cytokine that regulates complex multicellular processes.
- TNF action has been studied through three distinct modes: unrestricted damage, negative feedback regulation, and chronic inflammatory roles.
- Recent research highlights TNF's critical role in chronic inflammatory diseases.
Purpose of the Study:
- To review the different modes of tumor necrosis factor (TNF) action.
- To identify gaps in the understanding of the cellular and molecular basis of TNF's functions.
- To emphasize the importance of TNF in both acute and chronic inflammatory conditions.
Main Methods:
- Literature review of studies on tumor necrosis factor (TNF).
- Analysis of research focusing on TNF's effects on cell functions and inflammatory processes.
- Synthesis of findings regarding the three identified modes of TNF action.
Main Results:
- TNF mediates tissue damage through an initially unrestricted mode of action.
- Negative feedback mechanisms regulate TNF formation and function.
- TNF also plays a role in chronic inflammation with no apparent time restriction.
Conclusions:
- Significant gaps persist in understanding the cellular and molecular mechanisms underlying the three modes of TNF action.
- Further research is needed to elucidate the complex roles of TNF in health and disease.
- A comprehensive understanding of TNF's multifaceted actions is essential for therapeutic development.
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