title: Cytotoxic activity of halogenated monoterpenes from Plocamium cartilagineum.
abstract: Nine halogenated monoterpenes isolated from the red alga Plocamium cartilagineum have been evaluated for their cytotoxic effects on the tumor cell lines CT26 (murine colon adenocarcinoma), SW480 (human colon adenocarcinoma), HeLa (human cervical adenocarcinoma) and SkMel28 (human malignant melanoma) with several multidrug resistance mechanisms and the mammalian non-tumor cell line CHO (Chinese hamster ovary cells). The activities of these compounds were compared with those of the insecticide gamma-hexachlorocyclohexane (lindane) due to chemical structure similarities. Compounds 1, 2, 3, and 5 exhibited selective cytotoxicity against colon and cervical adenocarcinoma cells. Interestingly, the effect of compound 3 was specific and irreversible to human colon adenocarcinoma SW480 cells, which overexpress the transmembrane P-glycoprotein often related to chemoresistance. None of the anti-tumor doses of these compounds was cytotoxic against CHO cells. Furthermore, analysis of cellular extracts after incubation with the test compounds and rotenone (positive uptake control) demonstrated the intracellular accumulation of 1, 2, 3, and 5.
authors.affiliation: Centro de Ciencias Medioambientales, CSIC Serrano 115-dpdo, Madrid, Spain.
authors.forename: Concepción
authors.initials: C
authors.lastname: de Inés
authors.forename: Victor H
authors.initials: VH
authors.lastname: Argandoña
authors.forename: Juana
authors.initials: J
authors.lastname: Rovirosa
authors.forename: Aurelio
authors.initials: A
authors.lastname: San-Martín
authors.forename: Ana R
authors.initials: AR
authors.lastname: Díaz-Marrero
authors.forename: Mercedes
authors.initials: M
authors.lastname: Cueto
authors.forename: Azucena
authors.initials: A
authors.lastname: González-Coloma
mesh_terms: D000230:Adenocarcinoma; D000818:Animals; D000970:Antineoplastic Agents / Q000633:toxicity; D016466:CHO Cells; D045744:Cell Line, Tumor / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects*; D003110:Colonic Neoplasms; D006224:Cricetinae; D003412:Cricetulus; D018432:Drug Resistance, Multiple; D006367:HeLa Cells / Q000187:drug effects*; D006801:Humans; D008545:Melanoma; D051379:Mice; D039821:Monoterpenes / Q000494:pharmacology*; D044725:Plocamium / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D039821:Monoterpenes