title: NSC126188, a piperazine alkyl derivative, induces apoptosis via upregulation of RhoB in HeLa cells.
abstract: We describe here a piperazine alkyl derivative, NSC126188, which induced apoptosis of HeLa cells by upregulating RhoB expression. NSC126188 caused multi-septation of fission yeast and hypersensitized a ∆rho3 mutant, which implicates the involvement of functional human homolog RhoB. The treatment of cells with NSC126188 induced apoptosis and a dramatic increase in RhoB expression. In addition, RhoB knockdown using siRNA rescued cells from apoptosis, indicating a crucial role of RhoB in NSC126188-induced apoptosis. In a reporter assay using luciferase and EGFP under control of the RhoB promoter, NSC126188 increased both luciferase activity and the expression of EGFP, implicating transcriptional activation of RhoB by NSC126188. Furthermore, NSC126188 demonstrated in vivo anti-tumor activity, inhibiting tumor growth by 66.8% in a nude mouse xenograft using PC-3 human prostate cancer cells. These results suggest that NSC126188 is a potential lead compound and that upregulation of RhoB is associated with NSC126188-induced apoptosis.
authors.affiliation: Medical Genomics Research Center, KRIBB, Daejeon 305-806, South Korea.
authors.forename: Bo-Kyung
authors.initials: BK
authors.lastname: Kim
authors.forename: Dong-Myung
authors.initials: DM
authors.lastname: Kim
authors.forename: Kyung-Sook
authors.initials: KS
authors.lastname: Chung
authors.forename: Song-Kyu
authors.initials: SK
authors.lastname: Park
authors.forename: Shin-Jung
authors.initials: SJ
authors.lastname: Choi
authors.forename: Alexander
authors.initials: A
authors.lastname: Song
authors.forename: Kiho
authors.initials: K
authors.lastname: Lee
authors.forename: Chang-Woo
authors.initials: CW
authors.lastname: Lee
authors.forename: Kyung-Bin
authors.initials: KB
authors.lastname: Song
authors.forename: Gyoonhee
authors.initials: G
authors.lastname: Han
authors.forename: Julian
authors.initials: J
authors.lastname: Simon
authors.forename: Hwan Mook
authors.initials: HM
authors.lastname: Kim
authors.forename: Misun
authors.initials: M
authors.lastname: Won
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D017930:Genes, Reporter / Q000235:genetics; D006238:Haploidy; D006367:HeLa Cells; D006801:Humans; D008297:Male; D051379:Mice; D009154:Mutation / Q000235:genetics; D000077489:Piperazine; D010879:Piperazines / Q000737:chemistry / Q000494:pharmacology*; D011401:Promoter Regions, Genetic / Q000235:genetics; D011471:Prostatic Neoplasms / Q000473:pathology; D012568:Schizosaccharomyces / Q000187:drug effects / Q000254:growth & development; D015854:Up-Regulation / Q000187:drug effects*; D023041:Xenograft Model Antitumor Assays; D020743:rhoB GTP-Binding Protein / Q000235:genetics*
chemical_list: C558305:4-hexadecanoyl-1,1-dimethylpiperazin-1-ium; D010879:Piperazines; D000077489:Piperazine; D020743:rhoB GTP-Binding Protein