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Updated: Jun 27, 2026
08:55
The Colon-26 Carcinoma Tumor-bearing Mouse as a Model for the Study of Cancer Cachexia
Published on: November 30, 2016
Catabolic mediators of cancer cachexia
1Nutritional Biomedicine, School of Life and Health Sciences, Aston University, Birmingham, UK. M.J.Tisdale@aston.ac.uk
Current Opinion in Supportive and Palliative Care
|December 17, 2008
Summary
Tumor necrosis factor-alpha (TNF-alpha) and proteolysis-inducing factor (PIF) contribute to cancer cachexia. PIF shows promise as a therapeutic target for treating weight loss in cancer patients.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Cancer cachexia is a complex metabolic syndrome characterized by involuntary weight loss.
- Tumor necrosis factor-alpha (TNF-alpha) and proteolysis-inducing factor (PIF) are implicated in the catabolic processes of cachexia.
Purpose of the Study:
- To compare the catabolic actions of TNF-alpha and PIF.
- To investigate their roles in human cancer cachexia.
Main Methods:
- Review of existing literature on TNF-alpha and PIF.
- Analysis of molecular mechanisms of protein synthesis and degradation.
- Evaluation of clinical relevance and therapeutic potential.
Main Results:
- TNF-alpha directly affects skeletal muscle and adipose tissue, while PIF primarily impacts skeletal muscle.
- Both factors induce muscle atrophy via the ubiquitin-proteasome pathway and reactive oxygen species.
- TNF-alpha's role in cachexia is less clear, with limited therapeutic success, whereas PIF presence correlates with weight loss.
Conclusions:
- Blocking PIF receptor or signaling pathways presents a potential therapeutic strategy for cancer cachexia.
- PIF is a more promising target for treating cancer cachexia compared to TNF-alpha.
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