title: Novel indoloquinoline derivative, IQDMA, inhibits STAT5 signaling associated with apoptosis in K562 cells.
abstract: N'-(11H-indolo[3,2-c]quinolin-6-yl)-N,N-dimethylethane-1,2-diamine (IQDMA), an indoloquinoline derivative, synthesized in our laboratory, has been demonstrated to be an effective antitumor agent in human leukemia cells. In the present study, treatment with IQDMA inhibited phosphorylation of epidermal growth factor receptor (EGFR), Src, Bcr-Abl, and Janus-activated kinase (JAK2) in a time-dependent manner. IQDMA also degraded JAK2 protein. Moreover, signal transducer and activator of transcription 5 (STAT5) signaling were also blocked by IQDMA. However, IQDMA did not inhibit other oncogenic and tumor survival pathways such as those mediated by Akt and extracellular signal-regulated kinase 1/2. Furthermore, IQDMA upregulated the expression of p21 and p27 and downregulated the expression of cyclin D1, myeloid cell leukemia-1(Mcl-1), Bcl-X(L), and vascular endothelial growth factor (VEGF). Taken together, these results indicate that IQDMA causes significant induction of apoptosis in K562 cells via downregulation of EGFR, Src, Bcr-Abl, JAK2, and STAT5 signaling and modulation of p21, p27, cyclin D1, Mcl-1, Bcl-X(L), and VEGF proteins. Thus, IQDMA appears to be a potential therapeutic agent for treating leukemia K562 cells.
authors.affiliation: Faculty of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan, ROC.
authors.forename: Sheng-Huei
authors.initials: SH
authors.lastname: Yang
authors.forename: Ching-Ming
authors.initials: CM
authors.lastname: Chien
authors.forename: Jung-Chen
authors.initials: JC
authors.lastname: Su
authors.forename: Yeh-Long
authors.initials: YL
authors.lastname: Chen
authors.forename: Long-Sen
authors.initials: LS
authors.lastname: Chang
authors.forename: Shinne-Ren
authors.initials: SR
authors.lastname: Lin
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D020169:Caspases / Q000378:metabolism; D049109:Cell Proliferation / Q000187:drug effects; D019938:Cyclin D1 / Q000378:metabolism; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism; D015536:Down-Regulation / Q000187:drug effects; D004789:Enzyme Activation / Q000187:drug effects; D066246:ErbB Receptors / Q000378:metabolism; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D016044:Fusion Proteins, bcr-abl / Q000378:metabolism; D006801:Humans; D007211:Indoles / Q000737:chemistry / Q000494:pharmacology*; D053614:Janus Kinase 2 / Q000378:metabolism; D020014:K562 Cells; D020935:MAP Kinase Signaling System / Q000187:drug effects; D064549:Myeloid Cell Leukemia Sequence 1 Protein; D010766:Phosphorylation / Q000187:drug effects; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6 / Q000378:metabolism; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D016392:Proto-Oncogene Proteins pp60(c-src) / Q000378:metabolism; D011804:Quinolines / Q000737:chemistry / Q000494:pharmacology*; D050799:STAT5 Transcription Factor / Q000037:antagonists & inhibitors* / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins / Q000378:metabolism; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism; D051020:bcl-X Protein / Q000378:metabolism
chemical_list: D050759:Cyclin-Dependent Kinase Inhibitor p21; D007211:Indoles; D064549:Myeloid Cell Leukemia Sequence 1 Protein; C524250:N'-(11H-indolo(3,2-c)quinolin-6-yl)-N,N-dimethylethane-1,2-diamine; D019253:Proto-Oncogene Proteins c-bcl-2; D011804:Quinolines; C108944:SOCS1 protein, human; D050799:STAT5 Transcription Factor; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins; D042461:Vascular Endothelial Growth Factor A; D051020:bcl-X Protein; D019938:Cyclin D1; D050760:Cyclin-Dependent Kinase Inhibitor p27; D066246:ErbB Receptors; D016044:Fusion Proteins, bcr-abl; C507924:JAK2 protein, human; D053614:Janus Kinase 2; D016392:Proto-Oncogene Proteins pp60(c-src); D051057:Proto-Oncogene Proteins c-akt; D048049:Extracellular Signal-Regulated MAP Kinases; C509249:PTPN6 protein, human; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D020169:Caspases