title: Myricetin induces apoptosis via endoplasmic reticulum stress and DNA double-strand breaks in human ovarian cancer cells.
abstract: The mechanisms underlying myricetin-induced cancer cell apoptosis remain to be elucidated. Certain previous studies have shown that myricetin induces apoptosis through the mitochondrial pathway. Apoptosis, however, can also be induced by other classical pathways, including endoplasmic reticulum (ER) stress and DNA double‑strand breaks (DSBs). The aim of the present study was to assess whether these two apoptotic pathways are involved in myricetin‑induced cell death in SKOV3 ovarian cancer cells. The results revealed that treatment with myricetin inhibited viability of SKOV3 cells in a dose‑dependent manner. Myricetin induced nuclear chromatin condensation and fragmentation, and also upregulated the protein levels of active caspase 3 in a time‑dependent manner. In addition, myricetin upregulated ER stress‑associated proteins, glucose‑regulated protein‑78 and C/EBP homologous protein in SKOV3 cells. Phosphorylation of H2AX, a marker of DNA DSBs, was revealed to be upregulated in myricetin-treated cells. The data indicated that myricetin induces DNA DSBs and ER stress, which leads to apoptosis in SKOV3 cells.
authors.affiliation: Medical Research Laboratory, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Department of Pathophysiology, Basic Medical College, Jilin University, Changchun, Jilin 130021, P.R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Xie
authors.affiliation: Department of Medical Laboratory, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Wu
authors.affiliation: Medical Examination Center, Jilin Traditional Chinese and Western Medicine Hospital, Changchun, Jilin 132010, P.R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: Yi
authors.affiliation: Medical Research Laboratory, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Medical Research Laboratory, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Shibing
authors.initials: S
authors.lastname: Liu
authors.affiliation: Medical Research Laboratory, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Songyan
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Histology and Embryology, Jilin Medical University, Changchun, Jilin 132013, P.R. China.
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Li
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D053903:DNA Breaks, Double-Stranded / Q000187:drug effects*; D059865:Endoplasmic Reticulum Stress / Q000187:drug effects*; D005260:Female; D005419:Flavonoids / Q000494:pharmacology*; D006801:Humans; D010051:Ovarian Neoplasms / Q000473:pathology*
chemical_list: D005419:Flavonoids; C040015:myricetin