title: Labd-14-ene-8,13-diol (sclareol) induces cell cycle arrest and apoptosis in human breast cancer cells and enhances the activity of anticancer drugs.
abstract: Sclareol is a labdane-type diterpene that has demonstrated a significant cytotoxic activity against human leukemic cell lines. Here, we report the effect of sclareol against the human breast cancer cell lines MN1 and MDD2 derived from the parental cell line, MCF7. MN1 cells express functional p53, whereas MDD2 cells do not express p53. Flow cytometry analysis of the cell cycle indicated that sclareol was able to inhibit DNA synthesis induce arrest at the G(0/1) phase of the cycle apoptosis independent of p53. Sclareol-induced apoptosis was further assessed by detection of fragmented DNA in the cells. Furthermore, sclareol enhanced the activity of known anticancer drugs, doxorubicin, etoposide and cisplatinum, against MDD2 breast cancer cell line.
authors.affiliation: Laboratory of Pharmacology-Pharmacotechnology, Foundation for Biomedical Research of the Academy of Athens, 4 Soranou Efessiou, Athens 11527, Greece. ksdimas@bioacademy.gr
authors.forename: K
authors.initials: K
authors.lastname: Dimas
authors.forename: M
authors.initials: M
authors.lastname: Papadaki
authors.forename: C
authors.initials: C
authors.lastname: Tsimplouli
authors.forename: S
authors.initials: S
authors.lastname: Hatziantoniou
authors.forename: K
authors.initials: K
authors.lastname: Alevizopoulos
authors.forename: P
authors.initials: P
authors.lastname: Pantazis
authors.forename: C
authors.initials: C
authors.lastname: Demetzos
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D002453:Cell Cycle; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D002945:Cisplatin / Q000494:pharmacology; D004224:Diterpenes / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000494:pharmacology; D004347:Drug Interactions; D005047:Etoposide / Q000494:pharmacology; D005260:Female; D016193:G1 Phase; D006801:Humans; D016192:Resting Phase, Cell Cycle; D016196:S Phase; D013997:Time Factors; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D000970:Antineoplastic Agents; D004224:Diterpenes; D016159:Tumor Suppressor Protein p53; D005047:Etoposide; D004317:Doxorubicin; C070760:sclareol; D002945:Cisplatin