title: Effect of abietane diterpenes from Plectranthus grandidentatus on the growth of human cancer cell lines.
abstract: Five known abietane diterpenes, fatty acid esters of 7alpha-acyloxy-6beta-hydroxyroyleanone (1), grandidone A (2), 7alpha-acetoxy-6beta-hydroxyroyleanone (3), 6beta,7alpha-dihydroxyroyleanone (4), and coleon U (5), isolated from Plectranthus grandidentatus Gürke, were evaluated for their in vitro antiproliferative activity against five human cancer cell lines MCF-7, NCI-H460, SF-268, TK-10, and UACC-62. Coleon U (5) exhibited the strongest effect among all the assayed compounds. The abietane 3 revealed also a strong inhibitory effect while diterpenes 2 and 4 inhibited only slightly the growth of all cancer cell lines.
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D031346:Plectranthus; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: C469380:6,7-dihydroxyroyleanone; C469378:7-acyloxy-6-hydroxyroyleanone; D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes; D010936:Plant Extracts; C469377:coleon U; C469379:grandidone A