title: Investigation of anticancer mechanism of oleuropein via cell cycle and apoptotic pathways in SH-SY5Y neuroblastoma cells.
abstract: Neuroblastoma is one of the most common types of pediatric tumors that can spread quickly in neuronal tissues. Oleuropein which is active compound of olive leaves, belongs to polyphenols group and has antioxidant, anti-microbial, anti-inflammatory, anti-hypertensive and anti-carcinogenic effects. The aim of the study is to determine the therapeutic effects of oleuropein on cell proliferation, invasion, colony formation, cell cycle and apoptotic mechanisms in SH-SY5Y neuroblastoma cell line under in vitro conditions. The effect of oleuropein on cell viability was determined by XTT method. 84 cell cycle control and 84 apoptosis related genes were evaluated by RT-PCR. Effects of oleuropein on apoptosis were researched by TUNEL assay. Protein expressions were determined by western blot analysis. Effects of oleuropein on cell invasion, colony formation and migration were detected by matrigel-chamber, colony formation assay and wound-healing assay, respectively. IC50 value of oleuropein in SH-SY5Y cells was detected as 350 μM at 48th hours. It is determined that oleuropein causes cell cycle arrest by down-regulating of CylinD1,CylinD2,CyclinD3,CDK4,CDK6 and up-regulating of p53 and CDKN2A, CDKN2B, CDKN1A gene expressions. Oleuropein also induces apoptosis by inhibiting of Bcl-2 and activating of Bax,caspase-9 and caspase-3 gene expressions. Apoptotic cell ratio was found 36.4 ± 3.27% in oleuropein dose group. Oleuropein decreased invasion in SH-SY5Y cells and suppressed colony numbers in ratio of 53.6 ± 4.71%.Our results demonstrated that oleuropein can be a therapeutic agent in the treatment of neuroblastoma.
authors.affiliation: Pamukkale University, School of Medicine, Department of Medical Biology, Denizli, Turkey.
authors.forename: Mücahit
authors.initials: M
authors.lastname: Seçme
authors.affiliation: Necmettin Erbakan University, School of Medicine, Department of Medical Biology, Konya, Turkey.
authors.forename: Canan
authors.initials: C
authors.lastname: Eroğlu
authors.affiliation: Pamukkale University, School of Medicine, Department of Medical Biology, Denizli, Turkey. Electronic address: yavuzdodurga@gmail.com.
authors.forename: Yavuz
authors.initials: Y
authors.lastname: Dodurga
authors.affiliation: Pamukkale University, School of Medicine, Department of Medical Biology, Denizli, Turkey.
authors.forename: Gülseren
authors.initials: G
authors.lastname: Bağcı
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D000975:Antioxidants / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D059585:G1 Phase Cell Cycle Checkpoints / Q000187:drug effects*; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D020287:In Situ Nick-End Labeling; D057888:Iridoid Glucosides; D039823:Iridoids / Q000494:pharmacology*; D009361:Neoplasm Invasiveness / Q000473:pathology; D009447:Neuroblastoma / Q000188:drug therapy* / Q000473:pathology*; D014945:Wound Healing / Q000187:drug effects
chemical_list: D000970:Antineoplastic Agents; D000975:Antioxidants; D057888:Iridoid Glucosides; D039823:Iridoids; C002769:oleuropein
keywords: Apoptosis; Cell cycle; Neuroblastoma; Oleuropein