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Establishing Cell Lines Overexpressing DR3 to Assess the Apoptotic Response to Anti-mitotic Therapeutics
Published on: January 11, 2019
Antiapoptotic proteins as targets for bioactive compounds
1Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw Agricultural University, Nowoursynowska 159, 02-776 Warsaw, Poland. bepaj@wp.pl
Abstract:
One of the most promising strategies in colon cancer therapy is the sensitization of cancer cells to natural proapoptotic cytokines, such as death ligands and interferons, which are able to eliminate abnormal cells. The investigation of mechanisms determining the immune escape of cancer cells revealed the presence of antiapoptotic proteins, such as cFLIP, which inhibit cell death signal transduction. Numerous studies showed that the use of different metabolic inhibitors, such as cycloheximide (CHX), reduces the cFLIP protein level, thus restoring the susceptibility to TNF-alpha-induced apoptosis. However, high non-specific toxicity of CHX excludes the clinical use of this substance. The current efforts are focused on identification of bioactive compounds which could safely support immunotherapy. The review presents in vitro and in vivo evidence that butyrate (Bt), fatty acid produced in colon during fermentation process and parthenolide (PN), sesquiterpene lactone isolated from Tanacetum parthenium specifically affect different cancer cells. Among described various molecular mechanisms of Bt and PN action, one reduces the level of antiapoptotic proteins. This paper clearly demonstrates that bioactive compounds, especially combined with immune cytokines could be seriously considered as an alternative for routine colon anti-cancer therapy.
Insights
Butyrate and parthenolide can sensitize colon cancer cells to immune cytokines by reducing anti-apoptotic proteins. These compounds offer a safer alternative to toxic drugs for enhancing immunotherapy in colon cancer treatment.
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- Colon cancer cells evade apoptosis via anti-apoptotic proteins like cFLIP.
- Current therapies face challenges due to the high toxicity of agents like cycloheximide (CHX).
- There is a need for safer compounds to enhance immunotherapy efficacy.
Purpose of the Study:
- To review evidence on butyrate (Bt) and parthenolide (PN) as potential sensitizers for colon cancer therapy.
- To explore the mechanisms by which Bt and PN affect cancer cell apoptosis.
- To assess the potential of these compounds in combination with immune cytokines.
Main Methods:
- In vitro and in vivo studies were reviewed.
- Mechanisms of action for Bt and PN were investigated.
- The effect of these compounds on anti-apoptotic protein levels was examined.
Main Results:
- Butyrate (Bt) and parthenolide (PN) specifically target cancer cells.
- Both Bt and PN reduce the levels of anti-apoptotic proteins, including cFLIP.
- This reduction restores cancer cell sensitivity to apoptosis-inducing cytokines.
Conclusions:
- Bt and PN show promise in sensitizing colon cancer cells to immunotherapy.
- These compounds represent a safer alternative to toxic agents like CHX.
- Combined use of Bt/PN with immune cytokines could be a viable colon cancer treatment strategy.
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