|
|
||||||||
1From the Departments of Biomolecular Chemistry and 2Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
PURPOSE. To determine the molecular mechanisms by which resveratrol induces retinoblastoma tumor cell death.
METHODS. After resveratrol treatment, Y79 tumor cell viability was measured using a fluorescence-based assay, and proapoptotic and antiproliferative effects were characterized by Hoechst stain and flow cytometry, respectively. Mitochondrial transmembrane potential (
m) was measured as a function of drug treatment using 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-benzamidazolocarbocyanin iodide (JC-1), whereas the release of cytochrome c from mitochondria was assayed by immunoblotting and caspase activities were determined by monitoring the cleavage of fluorogenic peptide substrates.
RESULTS. Resveratrol induced a dose- and time-dependent decrease in Y79 tumor cell viability and inhibited proliferation by inducing S-phase growth arrest and apoptotic cell death. Preceding cell death, resveratrol evoked a rapid dissipation of 
m. This was followed by the release of cytochrome c into the cytoplasm and a substantial increase in the activities of caspase-9 and caspase-3. Additionally, in a cell-free system, resveratrol directly induced the depolarization of isolated mitochondria.
CONCLUSIONS. These results demonstrate that resveratrol, a nontoxic natural plant compound, inhibits Y79 cell proliferation and stimulates apoptosis through activation of the mitochondrial (intrinsic) apoptotic pathway and may warrant further exploration as an adjuvant to conventional anticancer therapies for retinoblastoma.
This article has been cited by other articles:
![]() |
K. H. Lin, G. Hsiao, C. M. Shih, D. S. Chou, and J. R. Sheu Mechanisms of resveratrol-induced platelet apoptosis Cardiovasc Res, June 8, 2009; (2009) cvp139v2. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. R. van Ginkel, S. R. Darjatmoko, D. Sareen, L. Subramanian, S. Bhattacharya, M. J. Lindstrom, D. M. Albert, and A. S. Polans Resveratrol Inhibits Uveal Melanoma Tumor Growth via Early Mitochondrial Dysfunction Invest. Ophthalmol. Vis. Sci., April 1, 2008; 49(4): 1299 - 1306. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. Sareen, S. R. Darjatmoko, D. M. Albert, and A. S. Polans Mitochondria, Calcium, and Calpain are Key Mediators of Resveratrol-Induced Apoptosis in Breast Cancer Mol. Pharmacol., December 1, 2007; 72(6): 1466 - 1475. [Abstract] [Full Text] [PDF] |
||||
![]() |
E. H. Heiss, Y. D. C. Schilder, and V. M. Dirsch Chronic Treatment with Resveratrol Induces Redox Stress- and Ataxia Telangiectasia-mutated (ATM)-dependent Senescence in p53-positive Cancer Cells J. Biol. Chem., September 14, 2007; 282(37): 26759 - 26766. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. R. van Ginkel, D. Sareen, L. Subramanian, Q. Walker, S. R. Darjatmoko, M. J. Lindstrom, A. Kulkarni, D. M. Albert, and A. S. Polans Resveratrol Inhibits Tumor Growth of Human Neuroblastoma and Mediates Apoptosis by Directly Targeting Mitochondria Clin. Cancer Res., September 1, 2007; 13(17): 5162 - 5169. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. A. Baran, K. A. Silverman, J. Zeskand, R. Koratkar, A. Palmer, K. McCullen, W. J. Curran Jr, T. B. Edmonston, L. D. Siracusa, and A. M. Buchberg The modifier of Min 2 (Mom2) locus: Embryonic lethality of a mutation in the Atp5a1 gene suggests a novel mechanism of polyp suppression Genome Res., May 1, 2007; 17(5): 566 - 576. [Abstract] [Full Text] [PDF] |
||||
![]() |
W. Luo, X. Zhou, X. Gong, M. Zheng, J. Zhang, and X. Guo Study of Sequential Histopathologic Changes, Apoptosis, and Cell Proliferation in Rabbit Livers After High-Intensity Focused Ultrasound Ablation J. Ultrasound Med., April 1, 2007; 26(4): 477 - 485. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |