Volume 114, Issue 8 pp. 1940-1954
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Mechanisms of ceramide-induced COX-2-dependent apoptosis in human ovarian cancer OVCAR-3 cells partially overlapped with resveratrol

Hung-Yun Lin

Corresponding Author

Hung-Yun Lin

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, 250 Wu-Hsing Street, Taipei, Taiwan.Search for more papers by this author
Dominique Delmas

Dominique Delmas

Université de Bourgogne, Faculté de Médecine, Dijon, Bourgogne, France

INSERM U866 “Chemotherapy, Lipid Metabolism and Antitumoral Immune Response”, Dijon, Bourgogne, France

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Ole Vang

Ole Vang

Department of Science, Systems and Models, Roskilde University, Roskilde, Denmark

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Tze-Chen Hsieh

Tze-Chen Hsieh

Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York

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Sharon Lin

Sharon Lin

Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Albany, New York

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Guei-Yun Cheng

Guei-Yun Cheng

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

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Hsiao-Ling Chiang

Hsiao-Ling Chiang

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

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Chiao En Chen

Chiao En Chen

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

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Heng-Yuan Tang

Heng-Yuan Tang

Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Albany, New York

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Dana R. Crawford

Dana R. Crawford

Center for Immunology & Microbial Disease, Albany Medical College, Albany, New York

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Jacqueline Whang-Peng

Jacqueline Whang-Peng

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

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Jaulang Hwang

Jaulang Hwang

Department of Biochemistry, School of Medicine, Taipei Medical University, Taipei, Taiwan

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Leroy F. Liu

Leroy F. Liu

Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan

Department of Pharmacology, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, New Jersey

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Joseph M. Wu

Joseph M. Wu

Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York

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First published: 13 March 2013
Citations: 40

Disclosure statement: Dr. Ole Vang is the consultant for Fluxome A/S; none of the other authors have a financial interest in the subject of this article.

Abstract

Ceramide is a member of the sphingolipid family of bioactive molecules demonstrated to have profound, diverse biological activities. Ceramide is a potential chemotherapeutic agent via the induction of apoptosis. Exposure to ceramide activates extracellular-signal-regulated kinases (ERK)1/2- and p38 kinase-dependent apoptosis in human ovarian cancer OVCAR-3 cells, concomitant with an increase in the expression of COX-2 and p53 phosphorylation. Blockade of cyclooxygenase-2 (COX-2) activity by siRNA or NS398 correspondingly inhibited ceramide-induced p53 Ser-15 phosphorylation and apoptosis; thus COX-2 appears at the apex of the p38 kinase-mediated signaling cascade induced by ceramide. Induction of apoptosis by ceramide or resveratrol was inhibited by the endocytosis inhibitor, cytochalasin D (CytD); however, cells exposed to resveratrol showed greater sensitivity than ceramide-treated cells. Ceramide-treated cells underwent a dose-dependent reduction in trans-membrane potential. Although both ceramide and resveratrol induced the expressions of caspase-3 and -7, the effect of inducible COX-2 was different in caspase-7 expression induced by ceramide compared to resveratrol. In summary, resveratrol and ceramide converge on an endocytosis-requiring, ERK1/2-dependent signal transduction pathway and induction of COX-expression as an essential molecular antecedent for subsequent p53-dependent apoptosis. In addition, expressions of caspase-3 and -7 are observed. However, a p38 kinase-dependent signal transduction pathway and change in mitochondrial potential are also involved in ceramide-induced apoptosis. J. Cell. Biochem. 114: 1940–1954, 2013. © 2013 Wiley Periodicals, Inc.

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