title: Macranthoside B, a hederagenin saponin extracted from Lonicera macranthoides and its anti-tumor activities in vitro and in vivo.
abstract: Macranthoside B (MB) is a hederagenin saponin extracted from the flower bud of Lonicera macranthoides. In this study, we defined the anticancer effect of MB both in vitro and in vivo using cell proliferation assays and xenograft tumor growth assays. Our data indicate that MB inhibits the proliferation of various kinds of cancer cells with IC(50) values in the range of 10-20 microM. Moreover, the volume and weight of xenograft tumors in nude mice treated with 5mg/kgMB were decreased remarkably compared to those of the vehicle control group. Furthermore, DAPI staining and flow cytometry analysis with Annexin V/PI double staining revealed that more apoptotic cells were observed following MB treatment. In addition, degradation of PARP (poly-ADP-ribose polymerase), and activation of the caspase cascade for intrinsic pathways were observed. We also found that the expression of Bcl-2 protein decreased and the protein level of Bax increased which leading to an increase of the Bax/Bcl-2 ratio. Our results showed that MB exhibited strong anti-tumor effect and mitochondrion-mediated apoptosis induction involved in it.
authors.affiliation: Key Laboratory of Carcinogenesis and Intervention, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, People's Republic of China.
authors.forename: Jia
authors.initials: J
authors.lastname: Wang
authors.forename: Xing-Zeng
authors.initials: XZ
authors.lastname: Zhao
authors.forename: Qi
authors.initials: Q
authors.lastname: Qi
authors.forename: Lei
authors.initials: L
authors.lastname: Tao
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhao
authors.forename: Rong
authors.initials: R
authors.lastname: Mu
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Gu
authors.forename: Ming
authors.initials: M
authors.lastname: Wang
authors.forename: Xu
authors.initials: X
authors.lastname: Feng
authors.forename: Qing-Long
authors.initials: QL
authors.lastname: Guo
mesh_terms: D000818:Animals; D017304:Annexin A5 / Q000096:biosynthesis / Q000235:genetics; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D015153:Blotting, Western; D020169:Caspases / Q000235:genetics / Q000502:physiology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007202:Indicators and Reagents; D031239:Lonicera / Q000737:chemistry*; D051379:Mice; D008807:Mice, Inbred BALB C; D008928:Mitochondria / Q000187:drug effects; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology; D011065:Poly(ADP-ribose) Polymerases / Q000096:biosynthesis / Q000235:genetics; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis / Q000235:genetics; D012503:Saponins / Q000494:pharmacology*; D015398:Signal Transduction / Q000187:drug effects; D023041:Xenograft Model Antitumor Assays; D051028:bcl-2-Associated X Protein / Q000096:biosynthesis / Q000235:genetics
chemical_list: D017304:Annexin A5; D000972:Antineoplastic Agents, Phytogenic; D007202:Indicators and Reagents; D019253:Proto-Oncogene Proteins c-bcl-2; D012503:Saponins; D051028:bcl-2-Associated X Protein; C543144:macranthoside B; D009828:Oleanolic Acid; D011065:Poly(ADP-ribose) Polymerases; D020169:Caspases