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Molecular mechanisms of resveratrol action in lung cancer cells using dual protein and microarray analyses
Lorna Whyte1, Yuan-Yen Huang, Karen Torres
1Carcinogenesis and Chemoprevention Division, IIT Research Institute, Chicago, Illinois 60616, USA.
Abstract:
Resveratrol, a natural phytoestrogen found in red wine and a variety of plants, is reported to have protective effects against lung cancer; however, there is little work directed toward the understanding of the mechanism of its action in this disease. In this study, we used a combination of experimental approaches to understand the biological activity and molecular mechanisms of resveratrol. Microarray gene expression profiling and high-throughput immunoblotting (PowerBlot) methodologies were employed to gain insights into the molecular mechanisms of resveratrol action in human lung cancer cells. In this report, we confirm the up-regulation of p53 and p21 and the induction of apoptosis by the activation of the caspases and the disruption of the mitochondrial membrane complex. We show the arrest of A549 cells in the G(1) phase of cell cycle in the presence of resveratrol and also report alterations in both gene and protein expressions of cyclin A, chk1, CDC27, and Eg5. Furthermore, the results indicated that resveratrol action is mediated via the transforming growth factor-beta pathway, particularly through the Smad proteins. Results showed the down-regulation of the Smad activators 2 and 4 and the up-regulation of the repressor Smad 7 as a result of resveratrol treatment. Resveratrol is a potent inhibitor of A549 lung cancer cell growth, and our results suggest that resveratrol may be a promising chemopreventive or chemotherapeutic agent for lung cancer.
Insights
Resveratrol inhibits lung cancer cell growth by inducing apoptosis and cell cycle arrest. This natural compound shows promise as a potential chemopreventive or chemotherapeutic agent for lung cancer.
Area of Science:
- Molecular Biology
- Cancer Research
- Pharmacology
Background:
- Resveratrol, a natural phytoestrogen, exhibits potential protective effects against lung cancer.
- The precise molecular mechanisms underlying resveratrol's action in lung cancer remain largely unexplored.
Purpose of the Study:
- To elucidate the biological activity and molecular mechanisms of resveratrol in human lung cancer cells.
- To investigate resveratrol's effects on cell cycle progression, apoptosis, and specific signaling pathways.
Main Methods:
- Utilized microarray gene expression profiling and high-throughput immunoblotting (PowerBlot).
- Analyzed gene and protein expression alterations in A549 lung cancer cells treated with resveratrol.
- Investigated the involvement of the transforming growth factor-beta (TGF-β) pathway and Smad proteins.
Main Results:
- Confirmed up-regulation of p53 and p21, leading to apoptosis via caspase activation and mitochondrial disruption.
- Observed cell cycle arrest at the G(1) phase and altered expression of cell cycle regulators (cyclin A, chk1, CDC27, Eg5).
- Demonstrated resveratrol's mediation through the TGF-β pathway, involving down-regulation of Smad 2/4 and up-regulation of Smad 7.
Conclusions:
- Resveratrol potently inhibits A549 lung cancer cell growth.
- The findings suggest resveratrol's potential as a chemopreventive or chemotherapeutic agent for lung cancer due to its multifaceted molecular actions.