Abstract
We have reported that basic fibroblast growth factor (bFGF) demonstrates an intimate connection with signal transducer and activator of transcription 3 (STAT3) in malignant brain tumor cells. However, its mechanisms are still unclear. In this study, we used inhibitors to block specific signaling pathways, including JAK, PI3K/Akt, and Src pathways, to explore how bFGF mediates crosstalk with STAT3 in two glioblastoma(GBM) cell lines: U251 (mutant p53) and U87 (wild-type p53). Furthermore, we explored how the bFGF/STAT3 pathway affects GBM cell apoptosis. Our results suggest that bFGF can induce the activation of STAT3 mainly through the JAK and PI3K/Akt pathways, and that siRNA-mediated knockdown of STAT3 markedly reduces the bFGF levels in U251 cells. Our results also suggest that STAT3 knockdown increases the expression of pro-apoptotic genes and decreases the expression of anti-apoptotic genes, subsequently collapsing the mitochondrial membrane potentials in vitro and impairs tumor growth in vivo.
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References
Niu G, Wright KL, Huang M et al (2002) Constitutive Stat3 activity up-regulates VEGF expression and tumor angiogenesis. Oncogene 21(13):2000–2008
Feng X, Zhang B, Wang J et al (2011) Adenovirus-mediated transfer of siRNA against basic fibroblast growth factor mRNA enhances the sensitivity of glioblastoma cells to chemotherapy. Med Oncol 28(1):24–30
Ferla R, Haspinger E, Surmacz E (2012) Metformin inhibits leptin-induced growth and migration of glioblastoma cells. Oncol Lett 4(5):1077–1081
Sledzevskaia IK, Kravtsova LA, Golovkov I et al (1990) The results of the rehabilitative treatment of myocardial infarct patients activated at the hospital stage according to an accelerated program. Ter Arkh 62(8):28–30
Liu Y, Li C, Lin J (2010) STAT3 as a therapeutic target for glioblastoma. Anticancer Agents Med Chem 10(7):512–519
Abou-Ghazal M, Yang DS, Qiao W et al (2008) The incidence, correlation with tumor-infiltrating inflammation, and prognosis of phosphorylated STAT3 expression in human gliomas. Clin Cancer Res 14(24):8228–8235
Yang F, Brown C, Buettner R et al (2010) Sorafenib induces growth arrest and apoptosis of human glioblastoma cells through the dephosphorylation of signal transducers and activators of transcription 3. Mol Cancer Ther 9(4):953–962
Johnson FM, Saigal B, Tran H et al (2007) Abrogation of signal transducer and activator of transcription 3 reactivation after Src kinase inhibition results in synergistic antitumor effects. Clin Cancer Res 13(14):4233–4244
Gately S, Soff GA, Brem S (1995) The potential role of basic fibroblast growth factor in the transformation of cultured primary human fetal astrocytes and the proliferation of human glioma (U-87) cells. Neurosurgery 37(4): 723–730; discussion 30–2
Fukui S, Nawashiro H, Otani N et al (2003) Nuclear accumulation of basic fibroblast growth factor in human astrocytic tumors. Cancer 97(12):3061–3067
Feng XQ, Wang JH, Xu XN et al (2010) Anti-glioma effect of combination of bFGF-siRNA and Vpr in nude mice. Zhonghua Zhong Liu Za Zhi 32(10):725–728
Liu J, Xu X, Feng X et al (2011) Adenovirus-mediated delivery of bFGF small interfering RNA reduces STAT3 phosphorylation and induces the depolarization of mitochondria and apoptosis in glioma cells U251. J Exp Clin Cancer Res 30:80
Ple PA, Green TP, Hennequin LF et al (2004) Discovery of a new class of anilinoquinazoline inhibitors with high affinity and specificity for the tyrosine kinase domain of c-Src. J Med Chem 47(4):871–887
Li P, Nijhawan D, Budihardjo I et al (1997) Cytochrome c and dATP-dependent formation of Apaf-1/caspase-9 complex initiates an apoptotic protease cascade. Cell 91(4):479–489
Yu H, Jove R (2004) The STATs of cancer—new molecular targets come of age. Nat Rev Cancer 4(2):97–105
Michaud-Levesque J, Bousquet-Gagnon N, Beliveau R (2012) Quercetin abrogates IL-6/STAT3 signaling and inhibits glioblastoma cell line growth and migration. Exp Cell Res 318(8):925–935
Jiang R, Tan Z, Deng L et al (2011) Interleukin-22 promotes human hepatocellular carcinoma by activation of STAT3. Hepatology 54(3):900–909
Li HS, Yang CY, Nallaparaju KC et al (2012) The signal transducers STAT5 and STAT3 control expression of Id2 and E2-2 during dendritic cell development. Blood 120(22):4363–4373
Lu Y, Yue X, Cui Y et al (2013) MicroRNA-124 suppresses growth of human hepatocellular carcinoma by targeting STAT3. Biochem Biophys Res Commun 441(4):873–879
Li Y, Xia JY, Chen W et al (2013) Effects of Ling Qi Juan Gan capsule drug-containing serum on PDGF-induced proliferation and JAK/STAT signaling of HSC-T6 cells. Zhonghua Gan Zang Bing Za Zhi 21(9):663–667
Fasler-Kan E, Barteneva NS, Ketterer S et al (2013) Human cytokines activate JAK-STAT signaling pathway in porcine ocular tissue. Xenotransplantation 20(6):469–480
Brantley EC, Nabors LB, Gillespie GY et al (2008) Loss of protein inhibitors of activated STAT-3 expression in glioblastoma multiforme tumors: implications for STAT-3 activation and gene expression. Clin Cancer Res 14(15):4694–4704
Lo HW, Cao X, Zhu H et al (2008) Constitutively activated STAT3 frequently coexpresses with epidermal growth factor receptor in high-grade gliomas and targeting STAT3 sensitizes them to Iressa and alkylators. Clin Cancer Res 14(19):6042–6054
Udayakumar TS, Stratton MS, Nagle RB et al (2002) Fibroblast growth factor-1 induced promatrilysin expression through the activation of extracellular-regulated kinases and STAT3. Neoplasia 4(1):60–67
Kozawa O, Otsuka T, Uematsu T (2002) Leukemia inhibitory factor enhances bFGF-induced IL-6 synthesis in osteoblasts: involvement of JAK2/STAT3. Cell Signal 14(4):311–315
Epling-Burnette PK, Liu JH, Catlett-Falcone R et al (2001) Inhibition of STAT3 signaling leads to apoptosis of leukemic large granular lymphocytes and decreased Mcl-1 expression. J Clin Invest 107(3):351–362
Qian C, Wang J, Yao J et al (2013) Involvement of nuclear JAK2 signaling in AG490-induced apoptosis of gastric cancer cells. Anat Rec (Hoboken) 296(12):1865–1873
Duan W, Yang Y, Yi W et al (2013) New role of JAK2/STAT3 signaling in endothelial cell oxidative stress injury and protective effect of melatonin. PLoS ONE 8(3):e57941
Puls LN, Eadens M, Messersmith W (2011) Current status of SRC inhibitors in solid tumor malignancies. Oncologist 16(5):566–578
de Wispelaere M, LaCroix AJ, Yang PL (2013) The small molecules AZD0530 and dasatinib inhibit dengue virus RNA replication via Fyn kinase. J Virol 87(13):7367–7381
Musumeci F, Schenone S, Brullo C et al (2012) An update on dual Src/Abl inhibitors. Future Med Chem 4(6):799–822
Ruan GX, Kazlauskas A (2012) Axl is essential for VEGF-A-dependent activation of PI3K/Akt. EMBO J 31(7):1692–1703
Tong B, Lu D, Wei Z et al (2012) Gleditsioside B, a triterpene saponin isolated from the anomalous fruits of Gleditsia sinensis Lam., abrogates bFGF-induced endothelial cell migration through preventing the activation of MMP-2 and FAK via inhibiting ERK and PI3K/AKT signaling pathways. Vascul Pharmacol 58(1–2):118–129
Workman P, Clarke PA, Raynaud FI et al (2010) Drugging the PI3 kinome: from chemical tools to drugs in the clinic. Cancer Res 70(6):2146–2157
Workman P, Clarke PA, Guillard S et al (2006) Drugging the PI3 kinome. Nat Biotechnol 24(7):794–796
Tchirkov A, Khalil T, Chautard E et al (2007) Interleukin-6 gene amplification and shortened survival in glioblastoma patients. Br J Cancer 96(3):474–476
Weissenberger J, Loeffler S, Kappeler A et al (2004) IL-6 is required for glioma development in a mouse model. Oncogene 23(19):3308–3316
Salmaggi A, Eoli M, Frigerio S et al (2003) Intracavitary VEGF, bFGF, IL-8, IL-12 levels in primary and recurrent malignant glioma. J Neurooncol 62(3):297–303
Liu Q, Li G, Li R et al (2010) IL-6 promotion of glioblastoma cell invasion and angiogenesis in U251 and T98G cell lines. J Neurooncol 100(2):165–176
Son MJ, Kim JS, Kim MH et al (2006) Combination treatment with temozolomide and thalidomide inhibits tumor growth and angiogenesis in an orthotopic glioma model. Int J Oncol 28(1):53–59
Cregan SP, Dawson VL, Slack RS (2004) Role of AIF in caspase-dependent and caspase-independent cell death. Oncogene 23(16):2785–2796
Bourke LT, Knight RA, Latchman DS et al (2013) Signal transducer and activator of transcription-1 localizes to the mitochondria and modulates mitophagy. JAKSTAT 2(4):e25666
Sugioka R, Shimizu S, Funatsu T et al (2003) BH4-domain peptide from Bcl-xL exerts anti-apoptotic activity in vivo. Oncogene 22(52):8432–8440
Chan SL, Yu VC (2004) Proteins of the bcl-2 family in apoptosis signalling: from mechanistic insights to therapeutic opportunities. Clin Exp Pharmacol Physiol 31(3):119–128
Gielen PR, Aftab Q, Ma N et al (2013) Connexin43 confers temozolomide resistance in human glioma cells by modulating the mitochondrial apoptosis pathway. Neuropharmacology 75:539–548
Sumalatha KR, Abiramasundari G, Chetan GK et al (2014) XIAP inhibitor and antiestrogen embelin abrogates metastasis and augments apoptosis in estrogen receptor positive human breast adenocarcinoma cell line MCF-7. Mol Biol Rep 41(2):935–946
Yang J, Ouyang J, Ouyang L et al (2013) Inhibition of cell proliferation and increase of chemosensitivity by simultaneous knockdown of XIAP and survivin in pancreatic carcinoma cells. Oncol Res 21(1):43–50
Xin H, Liu XH, Zhu YZ (2009) Herba leonurine attenuates doxorubicin-induced apoptosis in H9c2 cardiac muscle cells. Eur J Pharmacol 612(1–3):75–79
Nykky NJ, Vuento M, Gilbert L (2014) Role of mitochondria in parvovirus pathology. PLoS One 9(1):e86124
Matsumoto Y, Cao E, Ueoka R (2013) Growth inhibition by novel liposomes including trehalose surfactant against hepatocarcinoma cells along with apoptosis. Anticancer Res 33(11):4727–4740
Gordon N, Kleinerman ES (2010) Aerosol therapy for the treatment of osteosarcoma lung metastases: targeting the Fas/FasL pathway and rationale for the use of gemcitabine. J Aerosol Med Pulm Drug Deliv 23(4):189–196
Acknowledgments
This study was supported by grants from the National Natural Science Foundation of China (81101911), National Clinical Key Specialty Project Foundation of the Ministry of Health, P. R. China (2011873), the Tianjin Science and Technology Committee (11JCYBJC12100, 12ZCDZSY17700, 14JCZDJC35600), the Foundation of Tianjin Bureau of Public Health (11KG115, 2011KR11, 2012KR07) and the China Scholarship Council.
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Jingchao Wu and Xuequan Feng contributed equally to this work and should be considered as co-first author.
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Wu, J., Feng, X., Zhang, B. et al. Blocking the bFGF/STAT3 interaction through specific signaling pathways induces apoptosis in glioblastoma cells. J Neurooncol 120, 33–41 (2014). https://doi.org/10.1007/s11060-014-1529-8
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DOI: https://doi.org/10.1007/s11060-014-1529-8