title: JSI-124 inhibits glioblastoma multiforme cell proliferation through G(2)/M cell cycle arrest and apoptosis augment.
abstract: JSI-124 (cucurbitacin I) is a selective inhibitor of Janus kinase/signal transducer and activator of transcription 3(JAK/STAT3) and has been shown to exert anti-proliferative and anti-tumor properties both in vitro and in vivo. As STAT3 activation has been implicated in the development of glioma, we investigated the therapeutic efficacy of JSI-124 on glioblastoma multiforme (GBM) by interfering with STAT3 pathway. In present study, two GBM cell lines, U251 and A172 cells, were treated with JSI-124. The results showed that the cell growth was inhibited significantly in a dose-and time-dependent manner. Further investigation illustrated that the levels of phosphorylated-STAT3 were decreased in GBM cells treated by JSI-124, concomitant with apoptosis augment and cell cycle arrest. Specially, JSI-124 induced G(2)/M accumulation via downregulation of cyclin B1 and cdc2 expression. Together these results suggested that inhibition of STAT3 by JSI-124 is a potential strategy for the development of the new glioblastoma multiforme therapeutics.
authors.affiliation: Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, Shandong, China.
authors.forename: Yuhang
authors.initials: Y
authors.lastname: Su
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.forename: Xulong
authors.initials: X
authors.lastname: Zhang
authors.forename: Jinhai
authors.initials: J
authors.lastname: Gu
authors.forename: Cai
authors.initials: C
authors.lastname: Zhang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Tian
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001932:Brain Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D002453:Cell Cycle / Q000235:genetics*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D016195:G2 Phase / Q000187:drug effects; D005909:Glioblastoma / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D008938:Mitosis / Q000187:drug effects; D014315:Triterpenes / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D014315:Triterpenes; C038106:cucurbitacin I