title: Antiproliferative and proapoptotic activities of methanolic extracts from Ligustrum vulgare L. as an individual treatment and in combination with palladium complex.
abstract: The aim of this study is to examine the growth inhibitory effects of methanolic leaf and fruit extracts of L. vulgare on HCT-116 cells over different time periods and their synergistic effect with a Pd(apox) complex. The antiproliferative activity of plant extracts alone or in combination with the Pd(apox) complex was determined using MTT cell viability assay, where the IC(50) value was used as a parameter of cytotoxicity. Results show that antiproliferative effects of L. vulgare extracts increase with extension of exposure time, with decreasing IC(50) values, except for 72 h where the IC(50) values for methanolic leaf extract were lower than for the fruit extract. The Pd(apox) complex alone had a weak antiproliferative effect, but combination with L. vulgare extracts caused stronger effects with lower IC(50) values than with L. vulgare extracts alone. The type of cell death was explored by fluorescence microscopy using the acridin orange/ethidium bromide method. Treatments with plant extracts caused typical apoptotic morphological changes in HCT-116 cells and co-treatments with Pd(apox) complex caused higher levels of apoptotic cells than treatment with plant extracts alone. The results indicate that L. vulgare is a considerable source of natural bioactive substances with antiproliferative activity on HCT-116 cells and which have a substantial synergistic effect with the Pd(apox) complex.
authors.affiliation: Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Milena G
authors.initials: MG
authors.lastname: Ćurčić
authors.affiliation: Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Milan S
authors.identifier: 0000-0001-9861-7700
authors.initials: MS
authors.lastname: Stanković
authors.affiliation: Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Emina M
authors.initials: EM
authors.lastname: Mrkalić
authors.affiliation: Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Zoran D
authors.initials: ZD
authors.lastname: Matović
authors.affiliation: Department of Mathematics, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Dragić D
authors.initials: DD
authors.lastname: Banković
authors.affiliation: Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Danijela M
authors.initials: DM
authors.lastname: Cvetković
authors.affiliation: Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Dragana S
authors.initials: DS
authors.lastname: Đačić
authors.affiliation: Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Republic of Serbia.
authors.forename: Snežana D
authors.initials: SD
authors.lastname: Marković
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D045325:HCT116 Cells; D006801:Humans; D031659:Ligustrum / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry; D010165:Palladium / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D013997:Time Factors
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts; D010165:Palladium; D000432:Methanol