title: Avermectin Confers Its Cytotoxic Effects by Inducing DNA Damage and Mitochondria-Associated Apoptosis.
abstract: Avermectin (AVM) has been widely used in agriculture and animal husbandry on the basis of its broad spectrum of effective anthelmintic activity and specificity targets. However, AVM induction of cytotoxicity through DNA damage is remains elusive. Here we investigate the cytotoxic effects of AVM in human nontarget cells in vitro. We clarify that AVM inhibited the viability of HeLa cells and enhanced apoptosis. We have used alkaline comet assay and γH2AX foci formation to detect DNA damage of HeLa cells. As expected, we found AVM caused DNA double-strand breaks in HeLa cells, as measured by significance of comet assay parameters (e.g., tail DNA) and increases of γH2AX foci in HeLa cells. Moreover, established assays of cytotoxicity were performed to characterize the mechanism of AVM toxicity on HeLa cells. The results demonstrated the collapse of mitochondrial membrane potential, and up-regulating the expression level of Bax/Bcl-2 resulted in a release of cytochrome c into cytosol as well as the activation of caspase-9/-3 and cleavage of poly(ADP-ribose) polymerase (PARP). We conclude that AVM has a potential risk to human health by inducing human cell DNA damage and mitochondria-associated apoptosis.
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Mingming
authors.initials: M
authors.lastname: Luo
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Wenping
authors.initials: W
authors.lastname: Xu
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Mingjun
authors.initials: M
authors.lastname: Yang
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.affiliation: College of Life and Environmental Sciences, Shanghai Normal University , Shanghai 200234, China.
authors.forename: Jufang
authors.initials: J
authors.lastname: Gao
authors.affiliation: Department of Biology and Biochemistry, University of Bath , Claverton Down, Bath BA2 7AY, United Kingdom.
authors.forename: Yaxiao
authors.initials: Y
authors.lastname: Li
authors.affiliation: Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Liming
authors.initials: L
authors.lastname: Tao
mesh_terms: D017209:Apoptosis; D020552:Comet Assay; D053903:DNA Breaks, Double-Stranded; D004249:DNA Damage; D006367:HeLa Cells; D006801:Humans; D007559:Ivermectin / Q000031:analogs & derivatives* / Q000494:pharmacology; D053078:Membrane Potential, Mitochondrial; D008928:Mitochondria / Q000473:pathology
chemical_list: D007559:Ivermectin; C019264:avermectin
keywords: DNA damage; apoptosis; avermectin; cytotoxic effects; mitochondrial pathway