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Tumor Biology |
Departments of Oncology [L. B. M., R. B., J. S., J. D., N. A., R. G., T. B., A. C., C. M-C., J. P-S., R. J.], Pathology [L. B. M., J. D., N. A., R. Fal., R. Fai., C. M-C., S. L., R. J.], and Surgery [J. S., J. P-S.], H. Lee Moffitt Cancer Center and Research Institute, University of South Florida College of Medicine, Tampa, Florida 33612, and Antisense Drug Discovery, Isis Pharmaceuticals, Carlsbad, California 92008 [J. K.]
Signal transducers and activators of transcription (STATs) were identified originally as key components of cytokine signaling pathways. More recently, constitutive activation of STAT proteins has been detected in a wide variety of human tumor specimens and tumor cell lines. Here, we examined the activation of one STAT family member, Stat3, in human prostate cancer cell lines and primary prostate tumors. An analysis of 45 adenocarcinomas obtained at radical prostatectomy revealed elevated levels of constitutive Stat3 activation in 37 (82%) of 45 of the tumors compared with matched adjacent nontumor prostate tissues. A highly specific immunohistochemical assay for detection of phospho-Stat3 revealed that elevated Stat3 activity was localized primarily in the tumor cells of prostate carcinoma specimens. Furthermore, higher levels of Stat3 activation in patient specimens were correlated significantly with more malignant tumors exhibiting higher Gleason scores. In addition, all of the three human prostate cancer cell lines examined (DU145, PC3, and LNCaP) displayed constitutive activation of Stat3. Substantially lower levels of Stat3 activation were detected in LNCaP cells; however, stimulation with interleukin 6 induced a significant increase in Stat3 DNA-binding activity in these cells. Moreover, the direct inhibition of constitutive Stat3 signaling in DU145 cells using antisense Stat3 oligonucleotides induced growth inhibition and apoptosis. Our findings demonstrate that constitutive activation of Stat3 occurs frequently in primary prostate adenocarcinomas and is critical for the growth and survival of prostate cancer cells. These studies further suggest that Stat3 signaling represents a potentially novel molecular target for prostate cancer therapy.
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M. S. Redell, A. Tsimelzon, S. G. Hilsenbeck, and D. J. Tweardy Conditional overexpression of Stat3{alpha} in differentiating myeloid cells results in neutrophil expansion and induces a distinct, antiapoptotic and pro-oncogenic gene expression pattern J. Leukoc. Biol., October 1, 2007; 82(4): 975 - 985. [Abstract] [Full Text] [PDF] |
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K. Siddiquee, S. Zhang, W. C. Guida, M. A. Blaskovich, B. Greedy, H. R. Lawrence, M. L. R. Yip, R. Jove, M. M. McLaughlin, N. J. Lawrence, et al. Selective chemical probe inhibitor of Stat3, identified through structure-based virtual screening, induces antitumor activity PNAS, May 1, 2007; 104(18): 7391 - 7396. [Abstract] [Full Text] [PDF] |
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A. S. Punjabi, P. A. Carroll, L. Chen, and M. Lagunoff Persistent Activation of STAT3 by Latent Kaposi's Sarcoma-Associated Herpesvirus Infection of Endothelial Cells J. Virol., March 1, 2007; 81(5): 2449 - 2458. [Abstract] [Full Text] [PDF] |
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K. W. Kim, R. W. Mutter, C. Cao, J. M. Albert, E. T. Shinohara, K. R. Sekhar, and B. Lu Inhibition of signal transducer and activator of transcription 3 activity results in down-regulation of Survivin following irradiation. Mol. Cancer Ther., November 1, 2006; 5(11): 2659 - 2665. [Abstract] [Full Text] [PDF] |
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Z. S. Nagy, H. Rui, S. M. Stepkowski, J. Karras, and R. A. Kirken A Preferential Role for STAT5, not Constitutively Active STAT3, in Promoting Survival of a Human Lymphoid Tumor J. Immunol., October 15, 2006; 177(8): 5032 - 5040. [Abstract] [Full Text] [PDF] |
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R. P Singh and R. Agarwal Mechanisms of action of novel agents for prostate cancer chemoprevention. Endocr. Relat. Cancer, September 1, 2006; 13(3): 751 - 778. [Abstract] [Full Text] [PDF] |
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A. Kotha, M. Sekharam, L. Cilenti, K. Siddiquee, A. Khaled, A. S. Zervos, B. Carter, J. Turkson, and R. Jove Resveratrol inhibits Src and Stat3 signaling and induces the apoptosis of malignant cells containing activated Stat3 protein. Mol. Cancer Ther., March 1, 2006; 5(3): 621 - 629. [Abstract] [Full Text] [PDF] |
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H. Shao, X. Xu, N. Jing, and D. J. Tweardy Unique structural determinants for stat3 recruitment and activation by the granulocyte colony-stimulating factor receptor at phosphotyrosine ligands 704 and 744. J. Immunol., March 1, 2006; 176(5): 2933 - 2941. [Abstract] [Full Text] [PDF] |
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N. Jing, Q. Zhu, P. Yuan, Y. Li, L. Mao, and D. J. Tweardy Targeting signal transducer and activator of transcription 3 with G-quartet oligonucleotides: a potential novel therapy for head and neck cancer. Mol. Cancer Ther., February 1, 2006; 5(2): 279 - 286. [Abstract] [Full Text] [PDF] |
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T. Gritsko, A. Williams, J. Turkson, S. Kaneko, T. Bowman, M. Huang, S. Nam, I. Eweis, N. Diaz, D. Sullivan, et al. Persistent Activation of Stat3 Signaling Induces Survivin Gene Expression and Confers Resistance to Apoptosis in Human Breast Cancer Cells Clin. Cancer Res., January 1, 2006; 12(1): 11 - 19. [Abstract] [Full Text] [PDF] |
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E. B. Haura, Z. Zheng, L. Song, A. Cantor, and G. Bepler Activated Epidermal Growth Factor Receptor-Stat-3 Signaling Promotes Tumor Survival In vivo in Non-Small Cell Lung Cancer Clin. Cancer Res., December 1, 2005; 11(23): 8288 - 8294. [Abstract] [Full Text] [PDF] |
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S. M. Pulukuri, C. S. Gondi, S. S. Lakka, A. Jutla, N. Estes, M. Gujrati, and J. S. Rao RNA Interference-directed Knockdown of Urokinase Plasminogen Activator and Urokinase Plasminogen Activator Receptor Inhibits Prostate Cancer Cell Invasion, Survival, and Tumorigenicity in Vivo J. Biol. Chem., October 28, 2005; 280(43): 36529 - 36540. [Abstract] [Full Text] [PDF] |
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Q. Lin, R. Lai, L. R. Chirieac, C. Li, V. A. Thomazy, I. Grammatikakis, G. Z. Rassidakis, W. Zhang, Y. Fujio, K. Kunisada, et al. Constitutive Activation of JAK3/STAT3 in Colon Carcinoma Tumors and Cell Lines: Inhibition of JAK3/STAT3 Signaling Induces Apoptosis and Cell Cycle Arrest of Colon Carcinoma Cells Am. J. Pathol., October 1, 2005; 167(4): 969 - 980. [Abstract] [Full Text] [PDF] |
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J. Turkson, S. Zhang, L. B. Mora, A. Burns, S. Sebti, and R. Jove A Novel Platinum Compound Inhibits Constitutive Stat3 Signaling and Induces Cell Cycle Arrest and Apoptosis of Malignant Cells J. Biol. Chem., September 23, 2005; 280(38): 32979 - 32988. [Abstract] [Full Text] [PDF] |
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L. Gao, L. Zhang, J. Hu, F. Li, Y. Shao, D. Zhao, D. V. Kalvakolanu, D. J. Kopecko, X. Zhao, and D.-Q. Xu Down-Regulation of Signal Transducer and Activator of Transcription 3 Expression Using Vector-Based Small Interfering RNAs Suppresses Growth of Human Prostate Tumor In vivo Clin. Cancer Res., September 1, 2005; 11(17): 6333 - 6341. [Abstract] [Full Text] [PDF] |
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Z. Zheng, G. Bepler, A. Cantor, and E. B. Haura Small Tumor Size and Limited Smoking History Predicts Activated Epidermal Growth Factor Receptor in Early-Stage Non-small Cell Lung Cancer Chest, July 1, 2005; 128(1): 308 - 316. [Abstract] [Full Text] [PDF] |
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K. Schlessinger and D. E. Levy Malignant Transformation but not Normal Cell Growth Depends on Signal Transducer and Activator of Transcription 3 Cancer Res., July 1, 2005; 65(13): 5828 - 5834. [Abstract] [Full Text] [PDF] |
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J. V. Alvarez, P. G. Febbo, S. Ramaswamy, M. Loda, A. Richardson, and D. A. Frank Identification of a Genetic Signature of Activated Signal Transducer and Activator of Transcription 3 in Human Tumors Cancer Res., June 15, 2005; 65(12): 5054 - 5062. [Abstract] [Full Text] [PDF] |
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Z Culig, H Steiner, G Bartsch, and A Hobisch Mechanisms of endocrine therapy-responsive and -unresponsive prostate tumours Endocr. Relat. Cancer, June 1, 2005; 12(2): 229 - 244. [Abstract] [Full Text] [PDF] |
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H. Song, R. Wang, S. Wang, and J. Lin A low-molecular-weight compound discovered through virtual database screening inhibits Stat3 function in breast cancer cells PNAS, March 29, 2005; 102(13): 4700 - 4705. [Abstract] [Full Text] [PDF] |
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M. F. McCarty Targeting Multiple Signaling Pathways as a Strategy for Managing Prostate Cancer: Multifocal Signal Modulation Therapy Integr Cancer Ther, December 1, 2004; 3(4): 349 - 380. [Abstract] [PDF] |
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M. Thomas, C. E. Finnegan, K. M.-A. Rogers, J. W. Purcell, A. Trimble, P. G. Johnston, and M. P. Boland STAT1: A Modulator of Chemotherapy-induced Apoptosis Cancer Res., November 15, 2004; 64(22): 8357 - 8364. [Abstract] [Full Text] [PDF] |
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V. J. Assikis, K.-A. Do, S. Wen, X. Wang, J. H. Cho-Vega, S. Brisbay, R. Lopez, C. J. Logothetis, P. Troncoso, C. N. Papandreou, et al. Clinical and Biomarker Correlates of Androgen-Independent, Locally Aggressive Prostate Cancer with Limited Metastatic Potential Clin. Cancer Res., October 15, 2004; 10(20): 6770 - 6778. [Abstract] [Full Text] [PDF] |
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B. E. Barton, T. F. Murphy, P. Shu, H. F. Huang, M. Meyenhofen, and A. Barton Novel single-stranded oligonucleotides that inhibit signal transducer and activator of transcription 3 induce apoptosis in vitro and in vivo in prostate cancer cell lines Mol. Cancer Ther., October 1, 2004; 3(10): 1183 - 1191. [Abstract] [Full Text] [PDF] |
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N. Jing, Y. Li, W. Xiong, W. Sha, L. Jing, and D. J. Tweardy G-Quartet Oligonucleotides: A New Class of Signal Transducer and Activator of Transcription 3 Inhibitors That Suppresses Growth of Prostate and Breast Tumors through Induction of Apoptosis Cancer Res., September 15, 2004; 64(18): 6603 - 6609. [Abstract] [Full Text] [PDF] |
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H. Siavash, N.G. Nikitakis, and J.J. Sauk SIGNAL TRANSDUCERS AND ACTIVATORS OF TRANSCRIPTION: INSIGHTS INTO THE MOLECULAR BASIS OF ORAL CANCER Critical Reviews in Oral Biology & Medicine, September 1, 2004; 15(5): 298 - 307. [Abstract] [Full Text] [PDF] |
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R. D. Read, E. A. Bach, and R. L. Cagan Drosophila C-Terminal Src Kinase Negatively Regulates Organ Growth and Cell Proliferation through Inhibition of the Src, Jun N-Terminal Kinase, and STAT Pathways Mol. Cell. Biol., August 1, 2004; 24(15): 6676 - 6689. [Abstract] [Full Text] [PDF] |
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H. Li, T. J. Ahonen, K. Alanen, J. Xie, M. J. LeBaron, T. G. Pretlow, E. L. Ealley, Y. Zhang, M. Nurmi, B. Singh, et al. Activation of Signal Transducer and Activator of Transcription 5 in Human Prostate Cancer Is Associated with High Histological Grade Cancer Res., July 15, 2004; 64(14): 4774 - 4782. [Abstract] [Full Text] [PDF] |
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A. Moroz, C. Eppolito, Q. Li, J. Tao, C. H. Clegg, and P. A. Shrikant IL-21 Enhances and Sustains CD8+ T Cell Responses to Achieve Durable Tumor Immunity: Comparative Evaluation of IL-2, IL-15, and IL-21 J. Immunol., July 15, 2004; 173(2): 900 - 909. [Abstract] [Full Text] [PDF] |
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D. L. Silver, H. Naora, J. Liu, W. Cheng, and D. J. Montell Activated Signal Transducer and Activator of Transcription (STAT) 3: Localization in Focal Adhesions and Function in Ovarian Cancer Cell Motility Cancer Res., May 15, 2004; 64(10): 3550 - 3558. [Abstract] [Full Text] [PDF] |
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J. Kim, R. M. Adam, K. R. Solomon, and M. R. Freeman Involvement of Cholesterol-Rich Lipid Rafts in Interleukin-6-Induced Neuroendocrine Differentiation of LNCaP Prostate Cancer Cells Endocrinology, February 1, 2004; 145(2): 613 - 619. [Abstract] [Full Text] [PDF] |
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B. E. Barton, J. G. Karras, T. F. Murphy, A. Barton, and H. F-S. Huang Signal transducer and activator of transcription 3 (STAT3) activation in prostate cancer: Direct STAT3 inhibition induces apoptosis in prostate cancer lines Mol. Cancer Ther., January 1, 2004; 3(1): 11 - 20. [Abstract] [Full Text] |
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B. He, L. You, K. Uematsu, K. Zang, Z. Xu, A. Y. Lee, J. F. Costello, F. McCormick, and D. M. Jablons SOCS-3 is frequently silenced by hypermethylation and suppresses cell growth in human lung cancer PNAS, November 25, 2003; 100(24): 14133 - 14138. [Abstract] [Full Text] [PDF] |
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J. W. Mandell Phosphorylation State-Specific Antibodies: Applications in Investigative and Diagnostic Pathology Am. J. Pathol., November 1, 2003; 163(5): 1687 - 1698. [Abstract] [Full Text] [PDF] |
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J. D. Khoury, L. J. Medeiros, G. Z. Rassidakis, M. A. Yared, P. Tsioli, V. Leventaki, A. Schmitt-Graeff, M. Herling, H. M. Amin, and R. Lai Differential Expression and Clinical Significance of Tyrosine-phosphorylated STAT3 in ALK+ and ALK- Anaplastic Large Cell Lymphoma Clin. Cancer Res., September 1, 2003; 9(10): 3692 - 3699. [Abstract] [Full Text] [PDF] |
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