RRC ID 57819
Author Tang JY, Peng SY, Cheng YB, Wang CL, Farooqi AA, Yu TJ, Hou MF, Wang SC, Yen CH, Chan LP, Ou-Yang F, Chang HW.
Title Ethyl acetate extract of Nepenthes adrianii x clipeata induces antiproliferation, apoptosis, and DNA damage against oral cancer cells through oxidative stress.
Journal Environ Toxicol
Abstract Nepenthes plants are regarded as a kind of Traditional Chinese Medicine for several diseases but its anticancer activity remain unclear. The subject of this study is to evaluate the antiproliferation effects on oral cancer cells by Nepenthes plants using ethyl acetate extract of Nepenthes adrianii x clipeata (EANA). Cell viability was detected using MTS assay. Its detailed mechanisms including cell cycle, apoptosis, oxidative stress, and DNA damage were explored by flow cytometry or western blotting. For 24 hours EANA treatment, five kinds of oral cancer cells (CAL 27, Ca9-22, OECM-1, HSC-3, and SCC9) show IC50 values of cell viability ranging from 8 to 17 μg/mL but the viability of normal oral cells (HGF-1) remains over 80%. Subsequently, CAL 27 and Ca9-22 cells with high sensitivity to EANA were chosen to investigate the detailed mechanism. EANA displays the time course and concentration effects for inducing apoptosis based on flow cytometry (subG1 and annexin V analyses) and western blotting [cleaved poly (ADP-ribose) polymerase (c-PARP)]. Oxidative stress and DNA damage were induced by EANA treatments in oral cancer cells through reactive oxygen species (ROS), mitochondrial membrane potential disruption, mitochondrial superoxide, and γH2AX. All these changes of EANA treatments in oral cancer cells were reverted by the ROS scavenger N-acetylcysteine pretreatment. Therefore, EANA induces preferential killing, apoptosis, and DNA damage against oral cancer cells through oxidative stress.
Volume 34(8)
Pages 891-901
Published 2019-8
DOI 10.1002/tox.22748
PMID 31157515
MeSH Acetates Antineoplastic Agents, Phytogenic / pharmacology* Antineoplastic Agents, Phytogenic / therapeutic use Apoptosis Cell Cycle / drug effects Cell Line, Tumor Cell Proliferation / drug effects Cell Survival / drug effects DNA Damage Humans Membrane Potential, Mitochondrial / drug effects Mitochondria / metabolism Mouth Neoplasms / drug therapy* Mouth Neoplasms / metabolism Oxidative Stress* Phytotherapy Plant Extracts / pharmacology Poly(ADP-ribose) Polymerases / metabolism Reactive Oxygen Species / metabolism Tracheophyta*
IF 2.649
Human and Animal Cells Ca9-22(RCB1976) HSC-3(RCB1975)