Resveratrol--from the bottle to the bedside?

Area of Science:

• Oncology
• Molecular Biology
• Pharmacology

Background:

• Resveratrol, a natural plant compound, exhibits diverse biological activities including antioxidant, anti-inflammatory, and chemopreventive effects.
• Recent research highlights resveratrol's apoptosis-inducing activity in human cancer cells, intensifying interest in its chemotherapeutic potential.
• Understanding the precise mechanisms of resveratrol's anti-cancer activity, particularly its interaction with cell death pathways, is crucial.

Purpose of the Study:

• To investigate the anti-cancer activity of resveratrol by examining its role in inducing apoptosis in human leukemia and breast carcinoma cells.
• To elucidate the specific molecular mechanisms underlying resveratrol-induced apoptosis, focusing on the interplay between the CD95 signaling pathway and mitochondria.
• To evaluate the in vivo efficacy of resveratrol in a murine model of carcinogenesis.

Main Methods:

• In vitro studies utilizing human leukemia and breast carcinoma cell lines to assess resveratrol-induced apoptosis.
• Analysis of the CD95 signaling pathway, including CD95-CD95L interaction and caspase activation (caspase 8, 9, and 3).
• Investigation of mitochondrial involvement, specifically the release of cytochrome C.
• In vivo studies using a murine model of skin papilloma to assess the induction of apoptosis in tumor tissues.

Main Results:

• Resveratrol selectively induces apoptosis in human leukemia and breast carcinoma cells, sparing normal peripheral blood cells.
• The cytotoxicity of resveratrol is mediated by selective upregulation of CD95-CD95L interaction on tumor cell surfaces.
• Apoptosis induced by resveratrol involves mitochondrial release of cytochrome C and downstream activation of caspases 9 and 3, with limited caspase 8 activation.
• In vivo studies demonstrated resveratrol's ability to induce apoptosis in mouse skin papillomas.

Conclusions:

• Resveratrol possesses significant chemotherapeutic potential due to its ability to selectively trigger apoptosis in cancer cells.
• The mechanism involves the CD95 pathway and mitochondrial-dependent caspase activation, highlighting a targeted approach to cancer therapy.
• These findings support the further investigation of resveratrol as a viable chemopreventive and chemotherapeutic agent.