title: Resveratrol induces cell-cycle disruption and apoptosis in chemoresistant B16 melanoma.
abstract: Resveratrol, a naturally occurring polyphenol, has been shown to possess chemopreventive activities. In this study, we show that resveratrol (0-500 microM) inhibits the growth of a doxorubicin-resistant B16 melanoma cell subline (B16/DOX) (IC(50) = 25 microM after 72 h, P < 0.05). This was accomplished by imposing an artificial checkpoint at the G(1)-S phase transition, as demonstrated by cell-cycle analysis and down-regulation of cyclin D1/cdk4 and increased of p53 expression level. The G(1)-phase arrest of cell cycle in resveratrol-treated (10-100 microM) B16/DOX cells was followed by the induction of apoptosis, which was revealed by pyknotic nuclei and fragmented DNA. Resveratrol also potentiated at subtoxic dose (25 microM for 24 h) doxorubicin cytotoxicity in the chemoresistant B16 melanoma (P < 0.01). When administered to mice, resveratrol (12.5 mg/kg) reduced the growth of an established B16/DOX melanoma and prolonged survival (32% compared to untreated mice). All these data support a potential use of resveratrol alone or in combination with other chemotherapeutic agents in the management of chemoresistant tumors.
authors.affiliation: Faculty of Pharmacy, Department of Biochemistry and Molecular Biology, URCA, Reims, France.
authors.forename: Grégory
authors.initials: G
authors.lastname: Gatouillat
authors.forename: Emilie
authors.initials: E
authors.lastname: Balasse
authors.forename: Débora
authors.initials: D
authors.lastname: Joseph-Pietras
authors.forename: Hamid
authors.initials: H
authors.lastname: Morjani
authors.forename: Claudie
authors.initials: C
authors.lastname: Madoulet
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects*; D015153:Blotting, Western; D002453:Cell Cycle / Q000187:drug effects*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004317:Doxorubicin / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D008546:Melanoma, Experimental / Q000473:pathology*; D051379:Mice; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D013267:Stilbenes; D004317:Doxorubicin; D000077185:Resveratrol