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Tumor necrosis factor-alpha: molecular-biological aspects minireview
1Institute of Preventive and Clinical Medicine, Department of Clinical Immunology, Bratislava, Slovak Republic.
Abstract:
Tumor necrosis factor-alpha (TNF-alpha) a proinflammatory cytokine with multiple actions was first identified for its anticancer activity. However, TNF-alpha has a beneficial function in activation of host defense, its uncontrolled production can lead to pathological consequences. At the cellular level, it is able to exert obviously opposing effects: apoptosis and activation. It modulates survival and activates genes through various intermediates, including protein kinases, protein phosphatases, reactive oxygen intermediates, phospholipases, proteases, sphingomyelinases and transcription factors. In this review, the INF-alpha is characterized at the molecular and cellular level (TNF-alpha mediated signal transduction is discussed in the first part, regulation of its expression in the second one), as well as methods of its determination in biological materials, giving special emphasis to the molecular-biological approach. The full understanding of the molecular mechanism of TNF-alpha will provide the basis for a pharmacological approach intended to inhibit or potentiate selected biological actions of this cytokine.
Insights
Tumor necrosis factor-alpha (TNF-alpha), a key cytokine, has dual roles in anticancer activity and host defense. Understanding its molecular mechanisms is crucial for developing targeted therapies.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Tumor necrosis factor-alpha (TNF-alpha) is a proinflammatory cytokine initially recognized for anticancer properties.
- While essential for host defense, uncontrolled TNF-alpha production can cause pathological conditions.
- TNF-alpha exhibits opposing cellular effects, including apoptosis induction and activation.
Purpose of the Study:
- To review TNF-alpha at molecular and cellular levels, focusing on signal transduction and gene expression regulation.
- To discuss methods for determining TNF-alpha in biological samples, emphasizing molecular-biological techniques.
- To highlight the importance of understanding TNF-alpha's molecular mechanisms for pharmacological interventions.
Main Methods:
- Review of scientific literature on TNF-alpha.
- Analysis of TNF-alpha-mediated signal transduction pathways.
- Discussion of gene expression regulation mechanisms for TNF-alpha.
- Examination of molecular-biological methods for TNF-alpha determination.
Main Results:
- TNF-alpha modulates cell survival and gene activation via diverse intermediates.
- Signal transduction pathways and gene expression regulation of TNF-alpha are complex.
- Molecular-biological approaches offer precise methods for TNF-alpha quantification.
Conclusions:
- A comprehensive understanding of TNF-alpha's molecular mechanisms is essential.
- This knowledge will facilitate the development of pharmacological strategies to modulate TNF-alpha activity.
- Targeted inhibition or potentiation of TNF-alpha actions holds therapeutic potential.