title: Benzobijuglone, a novel cytotoxic compound from Juglans mandshurica, induced apoptosis in HeLa cervical cancer cells.
abstract: A new quinone compound, p-hydroxymethoxybenzobijuglone (HMBBJ), isolated from Juglans mandshurica by bioassay-guided fractionation, showed cytotoxic activity against HeLa cell line. Its chemical structure was determined by NMR and HREIMS spectra. In this paper, its ability to induce apoptosis in HeLa cells was studied for the first time. After treated with HMBBJ, the growth of HeLa cells was inhibited and cells displayed typical morphological apoptotic characteristics. Data from flow cytometry analysis showed that the HeLa cell cycle was arrested in the G2/M phase by HMBBJ, and the apoptotic rate of HeLa cells increased in a dose-dependent manner. Meanwhile, HMBBJ increased the expression of caspase-8, -3 and Bax, decreased the expression of Bcl-2, and lowered the DeltaPsi(m). These findings reveal that HMBBJ could efficiently induce HeLa cells apoptosis through mitochondria dependent pathway and activation of the caspase cascade, and it may be a potential chemotherapeutic candidate for the treatment of cancer.
authors.affiliation: Department of Bioscience and Biotechnology, Dalian University of Technology, Dalian 116024, PR China.
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Li
authors.forename: Jing-Yun
authors.initials: JY
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Jiang
authors.forename: Xiu-Li
authors.initials: XL
authors.lastname: Zhang
authors.forename: Li-Jia
authors.initials: LJ
authors.lastname: An
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Bao
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D016227:Benzoquinones / Q000494:pharmacology*; D053148:Caspase 3 / Q000378:metabolism; D053181:Caspase 8 / Q000378:metabolism; D005260:Female; D005434:Flow Cytometry; D006367:HeLa Cells; D006801:Humans; D008564:Membrane Potentials / Q000187:drug effects; D008928:Mitochondria / Q000187:drug effects / Q000502:physiology; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D002583:Uterine Cervical Neoplasms / Q000473:pathology; D051028:bcl-2-Associated X Protein / Q000378:metabolism
chemical_list: D016227:Benzoquinones; D019253:Proto-Oncogene Proteins c-bcl-2; D051028:bcl-2-Associated X Protein; C526331:p-hydroxymethoxybenzobijuglone; D053148:Caspase 3; D053181:Caspase 8