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Zimmers TA, Fishel ML, Bonetto A. STAT3 in the systemic inflammation of cancer cachexia. Semin Cell Dev Biol 2016; 54:28-41. [PMID: 26860754 PMCID: PMC4867234 DOI: 10.1016/j.semcdb.2016.02.009] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/04/2016] [Indexed: 02/07/2023]
Abstract
Weight loss is diagnostic of cachexia, a debilitating syndrome contributing mightily to morbidity and mortality in cancer. Most research has probed mechanisms leading to muscle atrophy and adipose wasting in cachexia; however cachexia is a truly systemic phenomenon. Presence of the tumor elicits an inflammatory response and profound metabolic derangements involving not only muscle and fat, but also the hypothalamus, liver, heart, blood, spleen and likely other organs. This global response is orchestrated in part through circulating cytokines that rise in conditions of cachexia. Exogenous Interleukin-6 (IL6) and related cytokines can induce most cachexia symptomatology, including muscle and fat wasting, the acute phase response and anemia, while IL-6 inhibition reduces muscle loss in cancer. Although mechanistic studies are ongoing, certain of these cachexia phenotypes have been causally linked to the cytokine-activated transcription factor, STAT3, including skeletal muscle wasting, cardiac dysfunction and hypothalamic inflammation. Correlative studies implicate STAT3 in fat wasting and the acute phase response in cancer cachexia. Parallel data in non-cancer models and disease states suggest both pathological and protective functions for STAT3 in other organs during cachexia. STAT3 also contributes to cancer cachexia through enhancing tumorigenesis, metastasis and immune suppression, particularly in tumors associated with high prevalence of cachexia. This review examines the evidence linking STAT3 to multi-organ manifestations of cachexia and the potential and perils for targeting STAT3 to reduce cachexia and prolong survival in cancer patients.
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Affiliation(s)
- Teresa A Zimmers
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IUPUI Center for Cachexia Research Innovation and Therapy, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
| | - Melissa L Fishel
- IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Pediatrics, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
| | - Andrea Bonetto
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IUPUI Center for Cachexia Research Innovation and Therapy, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
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152
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Kim C, Lee IH, Hyun HB, Kim JC, Gyawali R, Lee SG, Lee J, Kim SH, Shim BS, Cho SK, Ahn KS. Supercritical Fluid Extraction of Citrus iyo Hort. ex Tanaka Pericarp Inhibits Growth and Induces Apoptosis Through Abrogation of STAT3 Regulated Gene Products in Human Prostate Cancer Xenograft Mouse Model. Integr Cancer Ther 2016; 16:227-243. [PMID: 27185319 PMCID: PMC5739124 DOI: 10.1177/1534735416649659] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Activation of signal transducer and activator of transcription 3 (STAT3) is well known to play a major role in the cell growth, survival, proliferation, metastasis, and angiogenesis of various cancer cells. Most of the citrus species offer large quantities of phytochemicals that have beneficial effects attributed to their chemical components. Our study was carried out to evaluate the anticancer effects of the pericarp of Iyokan ( Citrus iyo Hort. ex Tanaka), locally known as yeagam in Korea, through modulation of the STAT3 signaling pathway in both tumor cells and a nude mice model. The effect of supercritical extracts of yeagam peel (SEYG) on STAT3 activation, associated protein kinases, STAT3-regulated gene products, cellular proliferation, and apoptosis was examined. The in vivo effect of SEYG on the growth of DU145 human prostate xenograft tumors in athymic nu/nu male mice was also investigated. We found SEYG exerted substantial inhibitory effect on STAT3 activation in human prostate cancer DU145 cells as compared to other tumor cells analyzed. SEYG inhibited proliferation and downregulated the expression of various STAT3-regulated gene products such as bcl-2, bcl-xL, survivin, IAP-1/2, cyclin D1, cyclin E, COX-2, VEGF, and MMP-9. This correlated with an increase in apoptosis as indicated by an increase in the expression of p53 and p21 proteins, the sub-G1 arrest, and caspase-3-induced PARP cleavage. When administered intraperitoneally, SEYG reduced the growth of DU145 human prostate xenograft tumors through downmodulation of STAT3 activation in athymic nu/nu male mice. Overall, these results suggest that SEYG extract has the potential source of STAT3 inhibitors that may have a potential in chemoprevention of human prostate cancer cells.
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Affiliation(s)
- Chulwon Kim
- 1 Kyung Hee University, Seoul, Republic of Korea
| | - Il Ho Lee
- 1 Kyung Hee University, Seoul, Republic of Korea
| | - Ho Bong Hyun
- 2 Jeju National University, Jeju, Republic of Korea
| | - Jong-Chan Kim
- 3 Korea Food Research Institute, Seongnam, Gyeonggi-do, Republic of Korea
| | | | | | - Junhee Lee
- 1 Kyung Hee University, Seoul, Republic of Korea
| | | | | | - Somi K Cho
- 2 Jeju National University, Jeju, Republic of Korea
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153
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Talati PG, Gu L, Ellsworth EM, Girondo MA, Trerotola M, Hoang DT, Leiby B, Dagvadorj A, McCue PA, Lallas CD, Trabulsi EJ, Gomella L, Aplin AE, Languino L, Fatatis A, Rui H, Nevalainen MT. Jak2-Stat5a/b Signaling Induces Epithelial-to-Mesenchymal Transition and Stem-Like Cell Properties in Prostate Cancer. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 185:2505-22. [PMID: 26362718 DOI: 10.1016/j.ajpath.2015.04.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/24/2015] [Accepted: 04/29/2015] [Indexed: 01/30/2023]
Abstract
Active Stat5a/b predicts early recurrence and disease-specific death in prostate cancer (PC), which both typically are caused by development of metastatic disease. Herein, we demonstrate that Stat5a/b induces epithelial-to-mesenchymal transition (EMT) of PC cells, as shown by Stat5a/b regulation of EMT marker expression (Twist1, E-cadherin, N-cadherin, vimentin, and fibronectin) in PC cell lines, xenograft tumors in vivo, and patient-derived PCs ex vivo using organ explant cultures. Jak2-Stat5a/b signaling induced functional end points of EMT as well, indicated by disruption of epithelial cell monolayers and increased migration and adhesion of PC cells to fibronectin. Knockdown of Twist1 suppressed Jak2-Stat5a/b-induced EMT properties of PC cells, which were rescued by re-introduction of Twist1, indicating that Twist1 mediates Stat5a/b-induced EMT in PC cells. While promoting EMT, Jak2-Stat5a/b signaling induced stem-like properties in PC cells, such as sphere formation and expression of cancer stem cell markers, including BMI1. Mechanistically, both Twist1 and BMI1 were critical for Stat5a/b induction of stem-like features, because genetic knockdown of Twist1 suppressed Stat5a/b-induced BMI1 expression and sphere formation in stem cell culture conditions, which were rescued by re-introduction of BMI1. By using human prolactin knock-in mice, we demonstrate that prolactin-Stat5a/b signaling promoted metastases formation of PC cells in vivo. In conclusion, our data support the concept that Jak2-Stat5a/b signaling promotes metastatic progression of PC by inducing EMT and stem cell properties in PC cells.
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Affiliation(s)
- Pooja G Talati
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Lei Gu
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Elyse M Ellsworth
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Melanie A Girondo
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Marco Trerotola
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - David T Hoang
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Benjamin Leiby
- Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Ayush Dagvadorj
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Peter A McCue
- Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Costas D Lallas
- Department of Urology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Edouard J Trabulsi
- Department of Urology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Leonard Gomella
- Department of Urology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Andrew E Aplin
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Lucia Languino
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania; Prostate Cancer Discovery and Development Program, Wistar Institute, Philadelphia, Pennsylvania
| | - Alessandro Fatatis
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Hallgeir Rui
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Medical Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Marja T Nevalainen
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Urology, Thomas Jefferson University, Philadelphia, Pennsylvania; Prostate Cancer Discovery and Development Program, Wistar Institute, Philadelphia, Pennsylvania; Department of Medical Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania.
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154
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Stewart TA, Azimi I, Brooks AJ, Thompson EW, Roberts-Thomson SJ, Monteith GR. Janus kinases and Src family kinases in the regulation of EGF-induced vimentin expression in MDA-MB-468 breast cancer cells. Int J Biochem Cell Biol 2016; 76:64-74. [PMID: 27163529 DOI: 10.1016/j.biocel.2016.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 04/07/2016] [Accepted: 05/06/2016] [Indexed: 12/20/2022]
Abstract
Epithelial-mesenchymal transition (EMT) is an important process associated with the metastasis of breast cancer cells. Members of the Janus kinases (JAKs) and Src family kinases (SFKs) are implicated in the regulation of an invasive phenotype in various cancer cell types. Using the pharmacological inhibitors JAK Inhibitor I (a pan-JAK inhibitor) and PP2 we investigated the role of the JAKs and SFKs, respectively, in the regulation of EMT markers in the MDA-MB-468 breast cancer cell line model of epidermal growth factor (EGF)-induced EMT. We identified selective inhibition of EGF induction of the mesenchymal marker vimentin by PP2 and JAK Inhibitor I. The effect of JAK Inhibitor I on vimentin protein induction occurred at a concentration lower than that required to significantly inhibit EGF-mediated signal transducer and activator of transcription 3 (STAT3)-phosphorylation, suggesting involvement of a STAT3-independent mechanism of EGF-induced vimentin regulation by JAKs. Despite our identification of a role for the JAK family in EGF-induced vimentin protein expression, siRNA-mediated silencing of each member of the JAK family was unable to phenocopy pharmacological inhibition, indicating potential redundancy among the JAK family members in this pathway. While SFKs and JAKs do not represent global regulators of the EMT phenotype, our findings have identified a role for members of these signaling pathways in the regulation of EGF-induced vimentin expression in the MDA-MB-468 breast cancer cell line.
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Affiliation(s)
- Teneale A Stewart
- School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia
| | - Iman Azimi
- School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia; Mater Research, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Andrew J Brooks
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia; The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Erik W Thompson
- Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Kelvin Grove, QLD, Australia; Australia and Translational Research Institute, Brisbane, QLD, Australia
| | | | - Gregory R Monteith
- School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia; Mater Research, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia.
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155
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Lee D, Wang YH, Kalaitzidis D, Ramachandran J, Eda H, Sykes DB, Raje N, Scadden DT. Endogenous transmembrane protein UT2 inhibits pSTAT3 and suppresses hematological malignancy. J Clin Invest 2016; 126:1300-10. [PMID: 26927669 PMCID: PMC4811118 DOI: 10.1172/jci84620] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 01/14/2016] [Indexed: 12/27/2022] Open
Abstract
Regulation of STAT3 activation is critical for normal and malignant hematopoietic cell proliferation. Here, we have reported that the endogenous transmembrane protein upstream-of-mTORC2 (UT2) negatively regulates activation of STAT3. Specifically, we determined that UT2 interacts directly with GP130 and inhibits phosphorylation of STAT3 on tyrosine 705 (STAT3Y705). This reduces cytokine signaling including IL6 that is implicated in multiple myeloma and other hematopoietic malignancies. Modulation of UT2 resulted in inverse effects on animal survival in myeloma models. Samples from multiple myeloma patients also revealed a decreased copy number of UT2 and decreased expression of UT2 in genomic and transcriptomic analyses, respectively. Together, these studies identify a transmembrane protein that functions to negatively regulate cytokine signaling through GP130 and pSTAT3Y705 and is molecularly and mechanistically distinct from the suppressors of cytokine signaling (SOCS) family of genes. Moreover, this work provides evidence that perturbations of this activation-dampening molecule participate in hematologic malignancies and may serve as a key determinant of multiple myeloma pathophysiology. UT2 is a negative regulator shared across STAT3 and mTORC2 signaling cascades, functioning as a tumor suppressor in hematologic malignancies driven by those pathways.
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Affiliation(s)
- Dongjun Lee
- Center for Regenerative Medicine and
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Stem Cell and Regenerative Biology and
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA
| | - Ying-Hua Wang
- Center for Regenerative Medicine and
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Stem Cell and Regenerative Biology and
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA
| | - Demetrios Kalaitzidis
- Center for Regenerative Medicine and
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Stem Cell and Regenerative Biology and
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA
| | | | - Homare Eda
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - David B. Sykes
- Center for Regenerative Medicine and
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Stem Cell and Regenerative Biology and
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA
| | - Noopur Raje
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - David T. Scadden
- Center for Regenerative Medicine and
- Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Stem Cell and Regenerative Biology and
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA
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156
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Gao SP, Chang Q, Mao N, Daly LA, Vogel R, Chan T, Liu SH, Bournazou E, Schori E, Zhang H, Brewer MR, Pao W, Morris L, Ladanyi M, Arcila M, Manova-Todorova K, de Stanchina E, Norton L, Levine RL, Altan-Bonnet G, Solit D, Zinda M, Huszar D, Lyden D, Bromberg JF. JAK2 inhibition sensitizes resistant EGFR-mutant lung adenocarcinoma to tyrosine kinase inhibitors. Sci Signal 2016; 9:ra33. [PMID: 27025877 DOI: 10.1126/scisignal.aac8460] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lung adenocarcinomas with mutant epidermal growth factor receptor (EGFR) respond to EGFR-targeted tyrosine kinase inhibitors (TKIs), but resistance invariably occurs. We found that the Janus kinase (JAK)/signal transduction and activator of transcription 3 (STAT3) signaling pathway was aberrantly increased in TKI-resistant EGFR-mutant non-small cell lung cancer (NSCLC) cells. JAK2 inhibition restored sensitivity to the EGFR inhibitor erlotinib in TKI-resistant cell lines and xenograft models of EGFR-mutant TKI-resistant lung cancer. JAK2 inhibition uncoupled EGFR from its negative regulator, suppressor of cytokine signaling 5 (SOCS5), consequently increasing EGFR abundance and restoring the tumor cells' dependence on EGFR signaling. Furthermore, JAK2 inhibition led to heterodimerization of mutant and wild-type EGFR subunits, the activity of which was then blocked by TKIs. Our results reveal a mechanism whereby JAK2 inhibition overcomes acquired resistance to EGFR inhibitors and support the use of combination therapy with JAK and EGFR inhibitors for the treatment of EGFR-dependent NSCLC.
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Affiliation(s)
- Sizhi P Gao
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Qing Chang
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Ninghui Mao
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Laura A Daly
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Robert Vogel
- Computational Biology Program, MSKCC, New York, NY 10065, USA
| | - Tyler Chan
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Shu Hui Liu
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Eirini Bournazou
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Erez Schori
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Haiying Zhang
- Children's Cancer and Blood Foundation Laboratories, Departments of Pediatrics, Cell and Developmental Biology, Weill Cornell Medical College (WCMC), New York, NY 10021, USA
| | - Monica Red Brewer
- Division of Hematology/Oncology, Vanderbilt-Ingram Cancer Center (VICC), Nashville, TN 37232, USA. Personalized Cancer Medicine, VICC, Nashville, TN 37232, USA
| | - William Pao
- Division of Hematology/Oncology, Vanderbilt-Ingram Cancer Center (VICC), Nashville, TN 37232, USA. Personalized Cancer Medicine, VICC, Nashville, TN 37232, USA
| | - Luc Morris
- Department of Surgery, MSKCC, New York, NY 10065, USA
| | - Marc Ladanyi
- Department of Pathology, MSKCC, New York, NY 10065, USA. Human Oncology and Pathogenesis Program, MSKCC, New York, NY 10065, USA
| | - Maria Arcila
- Department of Pathology, MSKCC, New York, NY 10065, USA
| | | | | | - Larry Norton
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA. WCMC, New York, NY 10021, USA
| | - Ross L Levine
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA. Human Oncology and Pathogenesis Program, MSKCC, New York, NY 10065, USA. WCMC, New York, NY 10021, USA
| | | | - David Solit
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA. Human Oncology and Pathogenesis Program, MSKCC, New York, NY 10065, USA. WCMC, New York, NY 10021, USA. Metastasis Research Center, MSKCC, New York, NY 10065, USA
| | | | | | - David Lyden
- Children's Cancer and Blood Foundation Laboratories, Departments of Pediatrics, Cell and Developmental Biology, Weill Cornell Medical College (WCMC), New York, NY 10021, USA. Department of Pediatrics, MSKCC, New York, NY 10065, USA. Drukier Institute for Children's Health, Meyer Cancer Center, WCMC, New York, NY 10021, USA.
| | - Jacqueline F Bromberg
- Department of Medicine, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA. WCMC, New York, NY 10021, USA.
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157
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McCormick KA, Coveler AL, Rossi GR, Vahanian NN, Link C, Chiorean EG. Pancreatic cancer: Update on immunotherapies and algenpantucel-L. Hum Vaccin Immunother 2016; 12:563-75. [PMID: 26619245 PMCID: PMC4964650 DOI: 10.1080/21645515.2015.1093264] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/21/2015] [Accepted: 09/07/2015] [Indexed: 12/15/2022] Open
Abstract
Pancreatic adenocarcinoma is notoriously lethal, and despite improvements in systemic chemotherapy approaches bringing survival rates for metastatic disease to almost 1 year, by 2030 it is expected to become the second leading cause of cancer death. Pancreatic cancer (PC) prognosis has been associated with both the presence of intratumoral helper and cytotoxic T lymphocytes, as well as humoral immune responses to tumor associated antigens like mesothelin. It is well described that the PC microenvironment is characterized by a fibroinflammatory and immunosuppressive stroma. On these premises several immune-targeted strategies have been developed to harness the adaptable immune system with a goal of improving survival with little toxicity. Cancer vaccines involve the administration of tumor-associated antigens with the goal of inducing an endogenous anti-tumor response. Among several strategies discussed, we will focus on the algenpantucel-L (HyperAcute™ Pancreas) immunotherapy. Algenpantucel-L is a whole cell immunotherapy consisting of irradiated allogeneic PC cells genetically engineered to express the murine enzyme α(1,3)-galactosyltransferase (αGT), which ultimately leads to hyperacute rejection with complement- and antibody-dependent cytotoxicity. While phase III data in the adjuvant treatment of pancreatic cancer are pending, phase II results have been encouraging, particularly for patients who demonstrated humoral immunologic responses. Novel strategies using immune checkpoint inhibitors, costimulatory antibodies, and combinations with cancer vaccines may overcome immunotolerance and improve treatment success.
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158
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Agyeman AS, Jun WJ, Proia DA, Kim CR, Skor MN, Kocherginsky M, Conzen SD. Hsp90 Inhibition Results in Glucocorticoid Receptor Degradation in Association with Increased Sensitivity to Paclitaxel in Triple-Negative Breast Cancer. Discov Oncol 2016; 7:114-26. [PMID: 26858237 DOI: 10.1007/s12672-016-0251-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/05/2016] [Indexed: 11/30/2022] Open
Abstract
Targetable molecular drivers for triple-negative breast cancer (TNBC) have been difficult to identify; therefore, standard treatment remains limited to conventional chemotherapy. Recently, new-generation small-molecule Hsp90 inhibitors (e.g., ganetespib and NVP-AUY922) have demonstrated improved safety and activity profiles over the first-generation ansamycin class. In breast cancer, clinical responses have been observed in a subset of TNBC patients following ganetespib monotherapy; however, the underlying biology of Hsp90 inhibitor treatment and tumor response is not well understood. Glucocorticoid receptor (GR) activity in TNBC is associated with chemotherapy resistance. Here, we find that treatment of TNBC cell lines with ganetespib resulted in GR degradation and decreased GR-mediated gene expression. Ganetespib-associated GR degradation also sensitized TNBC cells to paclitaxel-induced cell death both in vitro and in vivo. The beneficial effect of the Hsp90 inhibitor on paclitaxel-induced cytotoxicity was reduced when GR was depleted in TNBC cells but could be recovered with GR overexpression. These findings suggest that GR-regulated anti-apoptotic and pro-proliferative signaling networks in TNBC are disrupted by Hsp90 inhibitors, thereby sensitizing TNBC to paclitaxel-induced cell death. Thus, GR+ TNBC patients may be a subgroup of breast cancer patients who are most likely to benefit from adding an Hsp90 inhibitor to taxane therapy.
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Affiliation(s)
- Abena S Agyeman
- Department of Medicine-Hematology/Oncology, The University of Chicago, Chicago, IL, 60637, USA
| | - Wesley J Jun
- Department of Medicine-Hematology/Oncology, The University of Chicago, Chicago, IL, 60637, USA
| | - David A Proia
- Synta Pharmaceuticals Corporation, Lexington, MA, 02421, USA
| | - Caroline R Kim
- Department of Medicine-Hematology/Oncology, The University of Chicago, Chicago, IL, 60637, USA
| | - Maxwell N Skor
- Department of Medicine-Hematology/Oncology, The University of Chicago, Chicago, IL, 60637, USA
| | - Masha Kocherginsky
- Department of Health Studies, The University of Chicago, Chicago, IL, 60637, USA
| | - Suzanne D Conzen
- Department of Medicine-Hematology/Oncology, The University of Chicago, Chicago, IL, 60637, USA.
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, 60637, USA.
- Department of Medicine, The University of Chicago, 900 East 57th Street, Chicago, IL, 60637, USA.
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159
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Civenni G, Longoni N, Costales P, Dallavalle C, García Inclán C, Albino D, Nuñez LE, Morís F, Carbone GM, Catapano CV. EC-70124, a Novel Glycosylated Indolocarbazole Multikinase Inhibitor, Reverts Tumorigenic and Stem Cell Properties in Prostate Cancer by Inhibiting STAT3 and NF-κB. Mol Cancer Ther 2016; 15:806-18. [PMID: 26826115 DOI: 10.1158/1535-7163.mct-15-0791] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 01/08/2016] [Indexed: 11/16/2022]
Abstract
Cancer stem cells (CSC) contribute to disease progression and treatment failure in prostate cancer because of their intrinsic resistance to current therapies. The transcription factors NF-κB and STAT3 are frequently activated in advanced prostate cancer and sustain expansion of prostate CSCs. EC-70124 is a novel chimeric indolocarbazole compound generated by metabolic engineering of the biosynthetic pathways of glycosylated indolocarbazoles, such as staurosporine and rebeccamycin. In vitro kinome analyses revealed that EC-70124 acted as a multikinase inhibitor with potent activity against IKKβ and JAK2. In this study, we show that EC-70124 blocked concomitantly NF-κB and STAT3 in prostate cancer cells and particularly prostate CSCs, which exhibited overactivation of these transcription factors. Phosphorylation of IkB and STAT3 (Tyr705), the immediate targets of IKKβ and JAK2, respectively, was rapidly inhibited in vitro by EC-70124 at concentrations that were well below plasma levels in mice. Furthermore, the drug blocked activation of NF-κB and STAT3 reporters and suppressed transcription of their target genes. Treatment with EC-70124 impaired proliferation and colony formation in vitro and delayed development of prostate tumor xenografts. Notably, EC-70124 had profound effects on the prostate CSC subpopulation both in vitro and in vivo Thus, EC-70124 is a potent inhibitor of the NF-κB and STAT3 signaling pathways and blocked tumor growth and maintenance of prostate CSCs. EC-70124 may provide the basis for developing new therapeutic strategies that combine agents directed to the CSC component and the bulk tumor cell population for treatment of advanced prostate cancer. Mol Cancer Ther; 15(5); 806-18. ©2016 AACR.
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Affiliation(s)
- Gianluca Civenni
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland
| | - Nicole Longoni
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland
| | - Paula Costales
- Campus El Cristo, EntreChem, S.L., Edificio Científico Tecnológico, Oviedo, Spain
| | - Cecilia Dallavalle
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland
| | - Cristina García Inclán
- Department of Otolaryngology, IUOPA, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Domenico Albino
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland
| | - Luz Elena Nuñez
- Campus El Cristo, EntreChem, S.L., Edificio Científico Tecnológico, Oviedo, Spain
| | - Francisco Morís
- Campus El Cristo, EntreChem, S.L., Edificio Científico Tecnológico, Oviedo, Spain
| | - Giuseppina M Carbone
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland. Oncology Institute of Southern Switzerland (IOSI), Bellinzona, Switzerland
| | - Carlo V Catapano
- Tumor Biology and Experimental Therapeutics Program, Institute of Oncology Research (IOR), Bellinzona, Switzerland. Oncology Institute of Southern Switzerland (IOSI), Bellinzona, Switzerland. Department of Oncology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
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160
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Lu YM, Chen W, Zhu JS, Chen WX, Chen NW. Eriocalyxin B blocks human SW1116 colon cancer cell proliferation, migration, invasion, cell cycle progression and angiogenesis via the JAK2/STAT3 signaling pathway. Mol Med Rep 2016; 13:2235-40. [PMID: 26795301 DOI: 10.3892/mmr.2016.4800] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 09/16/2015] [Indexed: 11/06/2022] Open
Abstract
Eriocalyxin B, a natural ent-kaurene diterpene compound, has been shown to prevent carcinogenesis and tumor development. However, little is known regarding the mechanism underlying the antitumor activity of Eriocalyxin B in human colon cancer. The aim of the present study was to examine the role of Eriocalyxin B in SW1116 cells, and to verify the hypothesis that the Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling pathway may serve as a therapeutic target in human colon cancer treatment. Cell proliferation was measured with a Cell Counting kit‑8 assay, and the cell cycle was assessed by flow cytometry. Cell migration and invasion were measured by Transwell analysis. In addition, western blot analysis was performed to detect the protein expression levels in SW1116 cells treated with various concentrations of Eriocalyxin B. The results demonstrated that 1 µmol/l Eriocalyxin B was effective at inhibiting JAK2 and STAT3 phosphorylation, followed by the downregulation of JAK2 and STAT3 downstream target expression, which resulted in the inhibition of cell proliferation, migration, invasion and angiogenesis. Eriocalyxin B also suppressed the expression of proliferation‑associated protein (proliferating cell nuclear antigen) and angiogenesis‑associated proteins (vascular endothelial growth factor and vascular endothelial growth factor receptor 2), as well as that of migration- and invasion‑associated proteins (matrix metalloproteinase 2 and 9). These results suggested that Eriocalyxin B may suppress JAK2/STAT3 signaling, and thus act as a therapeutic or preventive agent in the treatment of human colon cancer.
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Affiliation(s)
- Yun-Min Lu
- Department of Gastroenterology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Wei Chen
- Department of Gastroenterology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Jin-Shui Zhu
- Department of Gastroenterology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Wei-Xiong Chen
- Department of Gastroenterology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Ni-Wei Chen
- Department of Gastroenterology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
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161
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Jia L, Song Q, Zhou C, Li X, Pi L, Ma X, Li H, Lu X, Shen Y. Dihydroartemisinin as a Putative STAT3 Inhibitor, Suppresses the Growth of Head and Neck Squamous Cell Carcinoma by Targeting Jak2/STAT3 Signaling. PLoS One 2016; 11:e0147157. [PMID: 26784960 PMCID: PMC4718674 DOI: 10.1371/journal.pone.0147157] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 12/29/2015] [Indexed: 11/18/2022] Open
Abstract
Developing drugs that can effectively block STAT3 activation may serve as one of the most promising strategy for cancer treatment. Currently, there is no putative STAT3 inhibitor that can be safely and effectively used in clinic. In the present study, we investigated the potential of dihydroartemisinin (DHA) as a putative STAT3 inhibitor and its antitumor activities in head and neck squamous cell carcinoma (HNSCC). The inhibitory effects of DHA on STAT3 activation along with its underlying mechanisms were studied in HNSCC cells. The antitumor effects of DHA against HNSCC cells were explored both in vitro and in vivo. An investigation on cooperative effects of DHA with cisplatin in killing HNSCC cells was also implemented. DHA exhibited remarkable and specific inhibitory effects on STAT3 activation via selectively blocking Jak2/STAT3 signaling. Besides, DHA significantly inhibited HNSCC growth both in vitro and in vivo possibly through induction of apoptosis and attenuation of cell migration. DHA also synergized with cisplatin in tumor inhibition in HNSCC cells. Our findings demonstrate that DHA is a putative STAT3 inhibitor that may represent a new and effective drug for cancer treatment and therapeutic sensitization in HNSCC patients.
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Affiliation(s)
- Lifeng Jia
- Postgraduate School, The Third Medical Military University, Chongqing, 400038, China
- Department of Otolaryngology Head and Neck Surgery, Bethune International Peace Hospital, Shijiazhuang, 050081, Hebei Province, China
| | - Qi Song
- Department of Otolaryngology Head and Neck Surgery, Bethune International Peace Hospital, Shijiazhuang, 050081, Hebei Province, China
- Postgraduate School, Medical College of PLA, Beijing, 100700, China
| | - Chenyang Zhou
- Postgraduate School, The Third Medical Military University, Chongqing, 400038, China
- Department of Otolaryngology Head and Neck Surgery, Bethune International Peace Hospital, Shijiazhuang, 050081, Hebei Province, China
| | - Xiaoming Li
- Department of Otolaryngology Head and Neck Surgery, Bethune International Peace Hospital, Shijiazhuang, 050081, Hebei Province, China
- * E-mail:
| | - Lihong Pi
- Department of Otolaryngology, Hebei General Hospital, Shijiazhuang, 050051, Hebei Province, China
| | - Xiuru Ma
- Department of Basic Sciences, Hebei College of Traditional Chinese Medicine, Shijiazhuang, 050061, Hebei Province, China
| | - Hui Li
- Department of Pathology, Bethune International Peace Hospital, Shijiazhuang, 050081, Hebei, Province, China
| | - Xiuying Lu
- Postgraduate School, The Third Medical Military University, Chongqing, 400038, China
| | - Yupeng Shen
- Postgraduate School, The Third Medical Military University, Chongqing, 400038, China
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162
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Bajusz D, Ferenczy GG, Keserű GM. Discovery of Subtype Selective Janus Kinase (JAK) Inhibitors by Structure-Based Virtual Screening. J Chem Inf Model 2015; 56:234-47. [DOI: 10.1021/acs.jcim.5b00634] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Dávid Bajusz
- Medicinal Chemistry Research
Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok krt. 2., Budapest 1117, Hungary
| | - György G. Ferenczy
- Medicinal Chemistry Research
Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok krt. 2., Budapest 1117, Hungary
| | - György M. Keserű
- Medicinal Chemistry Research
Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok krt. 2., Budapest 1117, Hungary
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163
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Geiger JL, Grandis JR, Bauman JE. The STAT3 pathway as a therapeutic target in head and neck cancer: Barriers and innovations. Oral Oncol 2015; 56:84-92. [PMID: 26733183 DOI: 10.1016/j.oraloncology.2015.11.022] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/12/2015] [Accepted: 11/27/2015] [Indexed: 02/08/2023]
Abstract
Proteins of the signal transducer and activator of transcription (STAT) family mediate cellular responses to cytokines and growth factors. Aberrant regulation of the STAT3 oncogene contributes to tumor formation and progression in many cancers, including head and neck squamous cell carcinoma (HNSCC), where hyperactivation of STAT3 is implicated in both treatment resistance and immune escape. There are no oncogenic gain-of-function mutations in HNSCC. Rather, aberrant STAT3 signaling is primarily driven by upstream growth factor receptors, such as Janus kinase (JAK) and epidermal growth factor receptor (EGFR). Moreover, genomic silencing of select protein tyrosine phosphatase receptors (PTPRs), tumor suppressors that dephosphorylate STAT3, may lead to prolonged phosphorylation and activation of STAT3. This review will summarize current knowledge of the STAT3 pathway and its contribution to HNSCC growth, survival, and resistance to standard therapies, and discuss STAT3-targeting agents in various phases of clinical development.
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Affiliation(s)
- Jessica L Geiger
- Department of Internal Medicine, Division of Hematology/Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, United States
| | - Jennifer R Grandis
- Department of Otolaryngology, University of California San Francisco, San Francisco, CA, United States
| | - Julie E Bauman
- Department of Internal Medicine, Division of Hematology/Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, United States.
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164
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Sen M, Pollock NI, Black J, DeGrave KA, Wheeler S, Freilino ML, Joyce S, Lui VWY, Zeng Y, Chiosea SI, Grandis JR. JAK kinase inhibition abrogates STAT3 activation and head and neck squamous cell carcinoma tumor growth. Neoplasia 2015; 17:256-64. [PMID: 25810010 PMCID: PMC4372647 DOI: 10.1016/j.neo.2015.01.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/02/2015] [Accepted: 01/07/2015] [Indexed: 12/18/2022] Open
Abstract
Aberrant activation of the Janus kinase (JAK)/signal transducer and activator of transcription (STAT) 3 has been implicated in cell proliferation and survival of many cancers including head and neck squamous cell carcinoma (HNSCC). AZD1480, an orally active pharmacologic inhibitor of JAK1/JAK2, has been tested in several cancer models. In the present study, the in vitro and in vivo effects of AZD1480 were evaluated in HNSCC preclinical models to test the potential use of JAK kinase inhibition for HNSCC therapy. AZD1480 treatment decreased HNSCC proliferation in HNSCC cell lines with half maximal effective concentration (EC50) values ranging from 0.9 to 4 μM in conjunction with reduction of pSTAT3Tyr705 expression. In vivo antitumor efficacy of AZD1480 was demonstrated in patient-derived xenograft (PDX) models derived from two independent HNSCC tumors. Oral administration of AZD1480 reduced tumor growth in conjunction with decreased pSTAT3Tyr705 expression that was observed in both PDX models. These findings suggest that the JAK1/2 inhibitors abrogate STAT3 signaling and may be effective in HNSCC treatment approaches.
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Affiliation(s)
- Malabika Sen
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Netanya I Pollock
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John Black
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kara A DeGrave
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sarah Wheeler
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Maria L Freilino
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sonali Joyce
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Vivian W Y Lui
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Yan Zeng
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Simion I Chiosea
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jennifer R Grandis
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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165
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Guo C, Qi H, Yu Y, Zhang Q, Su J, Yu D, Huang W, Chen WD, Wang YD. The G-Protein-Coupled Bile Acid Receptor Gpbar1 (TGR5) Inhibits Gastric Inflammation Through Antagonizing NF-κB Signaling Pathway. Front Pharmacol 2015; 6:287. [PMID: 26696888 PMCID: PMC4675858 DOI: 10.3389/fphar.2015.00287] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/17/2015] [Indexed: 01/24/2023] Open
Abstract
Gpbar1 (TGR5), a membrane-bound bile acid receptor, is well-known for its roles in regulation of energy homeostasis and glucose metabolism. Here, we show that mice lacking TGR5 were much more susceptible to lipopolysaccharide (LPS)-induced acute gastric inflammation than wild-type (WT) mice and TGR5 is a negative regulator of gastric inflammation through antagonizing NF-κB signaling pathway. We found that the treatment of TGR5 ligands 23(S)-mCDCA and GPBARA (3-(2-Chlorophenyl)-N-(4-chlorophenyl)-N,5-dimethylisoxazole-4-carboxamide) suppressed gene and protein expression mediated by NF-κB signaling. TGR5 overexpression with ligand treatment inhibited gene expression of interferon-inducible protein 10 (IP-10), TNF-α, and chemoattractant protein-1 (MCP-1) induced by LPS. Furthermore, we revealed that TGR5 activation antagonized NF-κB signaling pathway through suppressing its transcription activity, the phosphorylation of IκBα and p65 translocation, which suggests that TGR5 antagonizes gastric inflammation at least in part by inhibiting NF-κB signaling. These findings identify TGR5 as a negative mediator of gastric inflammation that may serve as an attractive therapeutic tool for human gastric inflammation and cancer.
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Affiliation(s)
- Cong Guo
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology Beijing, China
| | - Hui Qi
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Medicine, Henan University Kaifeng, China ; Key Laboratory of Molecular Pathology, School of Basic Medical Science, Inner Mongolia Medical University Hohhot, China
| | - Yingjie Yu
- Department of Materials Science and Engineering, State University of New York at Stony Brook Stony Brook, NY, USA
| | - Qiqi Zhang
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology Beijing, China
| | - Jia Su
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology Beijing, China
| | - Donna Yu
- Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center Duarte, CA, USA
| | - Wendong Huang
- Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center Duarte, CA, USA
| | - Wei-Dong Chen
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Medicine, Henan University Kaifeng, China ; Key Laboratory of Molecular Pathology, School of Basic Medical Science, Inner Mongolia Medical University Hohhot, China
| | - Yan-Dong Wang
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology Beijing, China
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166
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Yeh JE, Frank DA. STAT3-Interacting Proteins as Modulators of Transcription Factor Function: Implications to Targeted Cancer Therapy. ChemMedChem 2015; 11:795-801. [DOI: 10.1002/cmdc.201500482] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/01/2015] [Indexed: 12/14/2022]
Affiliation(s)
- Jennifer E. Yeh
- Department of Medical Oncology; Dana-Farber Cancer Institute; 450 Brookline Avenue Boston MA 02215 USA
| | - David A. Frank
- Department of Medical Oncology; Dana-Farber Cancer Institute; 450 Brookline Avenue Boston MA 02215 USA
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167
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Cowan RW, Maitra A, Rhim AD. A New Scalpel for the Treatment of Pancreatic Cancer: Targeting Stromal-Derived STAT3 Signaling. Gastroenterology 2015; 149:1685-8. [PMID: 26526714 PMCID: PMC5161089 DOI: 10.1053/j.gastro.2015.10.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Robert W. Cowan
- Division of Gastroenterology and Comprehensive Cancer Center, University of
Michigan Medical School
| | - Anirban Maitra
- Departments of Pathology and Translational Molecular Pathology, Sheikh Ahmed
Pancreatic Cancer Research Center, UT MD Anderson Cancer Center, Houston, Texas
| | - Andrew D. Rhim
- Division of Gastroenterology and Comprehensive Cancer Center, University of
Michigan Medical School
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168
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Meng F, Forrester-Gauntlett B, Turner P, Henderson H, Oback B. Signal Inhibition Reveals JAK/STAT3 Pathway as Critical for Bovine Inner Cell Mass Development. Biol Reprod 2015; 93:132. [PMID: 26510863 DOI: 10.1095/biolreprod.115.134254] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 10/13/2015] [Indexed: 12/31/2022] Open
Abstract
The inner cell mass (ICM) of mammalian blastocysts consists of pluripotent epiblast and hypoblast lineages, which develop into embryonic and extraembryonic tissues, respectively. We conducted a chemical screen for regulators of epiblast identity in bovine Day 8 blastocysts. From the morula stage onward, in vitro fertilized embryos were cultured in the presence of cell-permeable small molecules targeting nine principal signaling pathway components, including TGFbeta1, BMP, EGF, VEGF, PDGF, FGF, cAMP, PI3K, and JAK signals. Using 1) blastocyst quality (by morphological grading), 2) cell numbers (by differential stain), and 3) epiblast (FGF4, NANOG) and hypoblast (PDGFRa, SOX17) marker gene expression (by quantitative PCR), we identified positive and negative regulators of ICM development and pluripotency. TGFbeta1, BMP, and cAMP and combined VEGF/PDGF/FGF signals did not affect blastocyst development while PI3K was important for ICM growth but did not alter lineage-specific gene expression. Stimulating cAMP specifically increased NANOG expression, while combined VEGF/PDGF/FGF inhibition up-regulated epiblast and hypoblast markers. The strongest effects were observed by suppressing JAK1/2 signaling with AZD1480. This treatment interfered with ICM formation, but trophectoderm cell numbers and markers (CDX2, KTR8) were not altered. JAK inhibition repressed both epiblast and hypoblast transcripts as well as naive pluripotency-related genes (KLF4, TFCP2L1) and the JAK substrate STAT3. We found that tyrosine (Y) 705-phosphorylated STAT3 (pSTAT3(Y705)) was restricted to ICM nuclei, where it colocalized with SOX2 and NANOG. JAK inhibition abolished this ICM-exclusive pSTAT3(Y705) signal and strongly reduced the number of SOX2-positive nuclei. In conclusion, JAK/STAT3 activation is required for bovine ICM formation and acquisition of naive pluripotency markers.
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Affiliation(s)
- Fanli Meng
- AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, Hamilton, New Zealand
| | | | - Pavla Turner
- AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, Hamilton, New Zealand
| | - Harold Henderson
- AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, Hamilton, New Zealand
| | - Björn Oback
- AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, Hamilton, New Zealand
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169
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Zhang H, Zhan Z, Cui M, Gao Y, Wang D, Feng Y. Hydroxyflavanone inhibits gastric carcinoma MGC-803 cell proliferation. Int J Clin Exp Med 2015; 8:16955-16959. [PMID: 26629250 PMCID: PMC4659138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 09/06/2015] [Indexed: 06/05/2023]
Abstract
Gastric carcinoma (GC) is the most common primary malignancy of the digestive tract, with increasing incidence in many countries. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to assess inhibition of HepG2 cell proliferation by 2'-hydroxyflavanone. The STAT3 pathway was performed. 2'-hydroxyflavanone reduced inhibitory effects on MGC-803 cell proliferation. 2'-hydroxyflavanone exhibited the highest inhibition rate. Treatment of MGC-803 cells with 400, 200, and 100 μg/ml 2'-hydroxyflavanone resulted in 88.9±0.7%, 81.2±0.5%, 68.4±0.5% decrease in cell viability, respectively, indicating an IC50 of 9.3 μg/ml. The 100 μg/ml 2'-hydroxyflavanone can significantly inhibit the STAT3 pathway activation. 2'-hydroxyflavanone inhibits MGC-803 cell proliferation by inhibiting STAT3 pathway activation. This extract is therefore a potential drug candidate for treatment of liver cancer.
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Affiliation(s)
- Haiyan Zhang
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
| | - Zhuo Zhan
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
| | - Mingfu Cui
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
| | - Yongjian Gao
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
| | - Dayu Wang
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
| | - Ye Feng
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, China
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170
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Khanna P, Chua PJ, Bay BH, Baeg GH. The JAK/STAT signaling cascade in gastric carcinoma (Review). Int J Oncol 2015; 47:1617-26. [PMID: 26398764 DOI: 10.3892/ijo.2015.3160] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 08/03/2015] [Indexed: 11/06/2022] Open
Abstract
Gastric carcinoma remains one of the most prevalent forms of cancer worldwide, despite the decline in incidence rates, increased awareness of the disease and advancement in treatment strategies. Helicobacter pylori infection, dietary factors, lifestyle influences and various genetic aberrations have been shown to contribute to the development and progression of gastric cancer. Recent studies on the genomic landscape of gastric adenocarcinoma have identified several key signaling molecules, including epidermal growth factor receptor family (ErbB) members, vascular endothelial growth factor receptor family (VEGFR) members and PI3K/Akt/mTOR pathway components, that have been implicated in the molecular pathogenesis of gastric cancers. However, clinical trials with compounds that target these molecules have failed to show a significant improvement in overall survival rates when supplemented with conventional therapies. Therefore, it is essential to identify effective prognostic and/or diagnostic biomarkers and develop molecular targeted therapies. The JAK/STAT cascade is a principal signal transduction pathway in cytokine and growth factor signaling, regulating various cellular processes such as cell proliferation, differentiation, migration and survival. Numerous in vivo and in vitro studies have shown that dysregulated JAK/STAT signaling is a driving force in the pathogenesis of various solid cancers as well as hematopoietic malignancies. Hence, a large number of preclinical and clinical studies of drugs targeting this pathway are currently underway. Notably, aberrant JAK/STAT signaling has also been implicated in gastric cancers. In this review, we focus on the ongoing research on the JAK/STAT cascade in gastric carcinoma and discuss the therapeutic potential of targeting JAK/STAT signaling for the treatment of gastric cancer.
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Affiliation(s)
- Puja Khanna
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117 597, Republic of Singapore
| | - Pei Jou Chua
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117 597, Republic of Singapore
| | - Boon Huat Bay
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117 597, Republic of Singapore
| | - Gyeong Hun Baeg
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117 597, Republic of Singapore
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171
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Mochizuki D, Adams A, Warner KA, Zhang Z, Pearson AT, Misawa K, McLean SA, Wolf GT, Nör JE. Anti-tumor effect of inhibition of IL-6 signaling in mucoepidermoid carcinoma. Oncotarget 2015; 6:22822-35. [PMID: 26287605 PMCID: PMC4673202 DOI: 10.18632/oncotarget.4477] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 05/30/2015] [Indexed: 12/31/2022] Open
Abstract
Mucoepidermoid carcinoma (MEC) is the most frequent malignant salivary gland cancer. Response to chemoradiotherapy is modest, and therefore radical surgery remains the standard-of-care. Emerging evidence suggests that Interleukin (IL)-6 signaling correlates with the survival of cancer stem cells and resistance to therapy. Here, we investigated whether inhibition of IL-6 receptor (IL-6R) signaling with tocilizumab (humanized anti-human IL-6R antibody) sensitizes MEC to chemotherapy using human mucoepidermoid carcinoma cell lines (UM-HMC) and correspondent xenograft models. In vitro, we observed that tocilizumab inhibited STAT3 phosphorylation but had no measurable effect in MEC cell viability (UM-HMC-1,-3A,-3B). In contrast, the anti-tumor effect of single agent tocilizumab on MEC xenografts was comparable to paclitaxel or cisplatin. Combination of tocilizumab with cisplatin or paclitaxel enhanced the inhibitory effect of chemotherapy on xenograft growth (P < 0.05), time to failure (P < 0.01), decreased vascular endothelial growth factor (VEGF) expression and tumor microvessel density (P < 0.05) without added systemic toxicities. Notably, tocilizumab decreased the fraction of MEC cancer stem cells (ALDH(high)CD44(high)) in vitro, and prevented paclitaxel-induced increase in the fraction of cancer stem cells in vivo (P < 0.05). Collectively, these findings demonstrate that tocilizumab enhances the anti-tumor effect of conventional chemotherapy in preclinical models of mucoepidermoid carcinoma, and suggest that patients might benefit from combination therapy with an inhibitor of IL-6R signaling and chemotherapeutic agent such as paclitaxel.
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Affiliation(s)
- Daiki Mochizuki
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
- Department of Otolaryngology/Head Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - April Adams
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Kristy A. Warner
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Zhaocheng Zhang
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Alexander T. Pearson
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
| | - Kiyoshi Misawa
- Department of Otolaryngology/Head Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Scott A. McLean
- Department of Otolaryngology, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
| | - Gregory T. Wolf
- Department of Otolaryngology, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
| | - Jacques E. Nör
- Department of Restorative Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
- Department of Otolaryngology, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
- Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, Michigan, USA
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
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172
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Liu C, Lou W, Armstrong C, Zhu Y, Evans CP, Gao AC. Niclosamide suppresses cell migration and invasion in enzalutamide resistant prostate cancer cells via Stat3-AR axis inhibition. Prostate 2015; 75:1341-53. [PMID: 25970160 PMCID: PMC4536195 DOI: 10.1002/pros.23015] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/16/2015] [Indexed: 12/17/2022]
Abstract
PURPOSE It is known that over expression of IL6 in prostate cancer cells confer enzalutamide resistance and that this may occur through constitutive Stat3 activation. Additionally, recent pre-clinical studies suggested enzalutamide might have the potential adverse effect of inducing metastasis of prostate cancer cells via Stat3 activation. This study is aimed to target Stat3 activation and improve enzalutamide therapy. EXPERIMENTAL DESIGN Sensitivity of prostate cancer cells to enzalutamide was tested using cell growth assays and clonogenic assays. Wound healing and invasion assays were performed to determine cell migration and invasion in vitro. Quantitative reverse transcription-PCR, ELISA and Western blotting were performed to detect expression levels of PSA, c-Myc, survivin, Stat3, and AR. ChIP assay was performed to examine recruitment of AR to the PSA promoter. RESULTS In the present study, we found niclosamide, a previously identified novel inhibitor of androgen receptor variant (AR-V7), inhibited Stat3 phosphorylation, and expression of downstream target genes. Niclosamide synergistically reversed enzalutamide resistance in prostate cancer cells and combination treatment of niclosamide with enzalutamide significantly induced cell apoptosis and inhibited cell growth, colony formation, cell migration and invasion. Knock down of Stat3 abrogated enzalutamide resistance resulting in reduced recruitment of AR to the PSA promoter in prostate cancer cells expressing IL6. Moreover, niclosamide reversed enzalutamide resistance by down-regulating Stat3 target gene expression Stat3and abrogating recruitment of AR to PSA promoter resulting in PSA inhibition. CONCLUSIONS This study demonstrated the IL6-Stat3-AR axis in prostate cancer is one of the crucial mechanisms of enzalutamide resistance. Niclosamide has the potential to target the IL6-Stat3-AR pathway to overcome enzalutamide resistance and inhibit migration and invasion in advanced prostate cancer.
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Affiliation(s)
- Chengfei Liu
- Department of Urology, University of California at Davis, Sacramento, CA, USA
| | - Wei Lou
- Department of Urology, University of California at Davis, Sacramento, CA, USA
| | - Cameron Armstrong
- Department of Urology, University of California at Davis, Sacramento, CA, USA
| | - Yezi Zhu
- Department of Urology, University of California at Davis, Sacramento, CA, USA
- Graduate Program in Pharmacology and Toxicology, University of California at Davis, Sacramento, CA, USA
| | - Christopher P Evans
- Department of Urology, University of California at Davis, Sacramento, CA, USA
- Comprehensive Cancer Center, University of California at Davis, Sacramento, CA, USA
| | - Allen C. Gao
- Department of Urology, University of California at Davis, Sacramento, CA, USA
- Graduate Program in Pharmacology and Toxicology, University of California at Davis, Sacramento, CA, USA
- Comprehensive Cancer Center, University of California at Davis, Sacramento, CA, USA
- To whom correspondence should be addressed: Department of Urology University of California Davis Medical Center 4645 2 Ave, Research III, Suite 1300 Sacramento, CA 95817
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173
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Lin WW, Yi Z, Stunz LL, Maine CJ, Sherman LA, Bishop GA. The adaptor protein TRAF3 inhibits interleukin-6 receptor signaling in B cells to limit plasma cell development. Sci Signal 2015; 8:ra88. [PMID: 26329582 DOI: 10.1126/scisignal.aaa5157] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tumor necrosis factor receptor-associated factor 3 (TRAF3) is an adaptor protein that inhibits signaling by CD40 and by the receptor for B cell-activating factor (BAFF) and negatively regulates homeostatic B cell survival. Loss-of-function mutations in TRAF3 are associated with human B cell malignancies, in particular multiple myeloma. The cytokine interleukin-6 (IL-6) supports the differentiation and survival of normal and neoplastic plasma cells. We found that mice with a deficiency in TRAF3 specifically in B cells (B-Traf3(-/-) mice) had about twice as many plasma cells as did their littermate controls. TRAF3-deficient B cells had enhanced responsiveness to IL-6, and genetic loss of IL-6 in B-Traf3(-/-) mice restored their plasma cell numbers to normal. TRAF3 inhibited IL-6 receptor (IL-6R)-mediated signaling by facilitating the association of PTPN22 (a nonreceptor protein tyrosine phosphatase) with the kinase Janus-activated kinase 1 (Jak1), which in turn blocked phosphorylation of the transcription factor STAT3 (signal transducer and activator of transcription 3). Consistent with these results, the number of plasma cells in the PTPN22-deficient mice was increased compared to that in the wild-type mice. Our findings identify TRAF3 and PTPN22 as inhibitors of IL-6R signaling in B cells and reveal a previously uncharacterized role for TRAF3 in the regulation of plasma cell differentiation.
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Affiliation(s)
- Wai W Lin
- Graduate Immunology Program, University of Iowa, Iowa City, IA 52242, USA
| | - Zuoan Yi
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Laura L Stunz
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Christian J Maine
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Linda A Sherman
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Gail A Bishop
- Graduate Immunology Program, University of Iowa, Iowa City, IA 52242, USA. Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA. Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA. Veterans Affairs Medical Center, Iowa City, IA 52246, USA.
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174
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Permuth-Wey J, Fulp WJ, Reid BM, Chen Z, Georgeades C, Cheng JQ, Magliocco A, Chen DT, Lancaster JM. STAT3 polymorphisms may predict an unfavorable response to first-line platinum-based therapy for women with advanced serous epithelial ovarian cancer. Int J Cancer 2015; 138:612-9. [PMID: 26264211 DOI: 10.1002/ijc.29799] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 07/30/2015] [Accepted: 07/31/2015] [Indexed: 01/09/2023]
Abstract
Cancer stem cells (CSC) contribute to epithelial ovarian cancer (EOC) progression and therapeutic response. We hypothesized that germline single nucleotide polymorphisms (SNPs) in CSC-related genes may predict an initial therapeutic response for women newly diagnosed with EOC. A nested case-control design was used to study 361 women with advanced-stage serous EOC treated with surgery followed by first-line platinum-based combination therapy at Moffitt Cancer Center or as part of The Cancer Genome Atlas Study. "Cases" included 102 incomplete responders (IRs) and "controls" included 259 complete clinical responders (CRs) to therapy. Using Illumina genotyping arrays and imputation, DNA samples were evaluated for 5,509 SNPs in 24 ovarian CSC-related genes. We also evaluated the overall significance of each CSC gene using the admixture maximum likelihood (AML) test, and correlated genotype with EOC tumor tissue expression. The strongest SNP-level associations with an IR to therapy were identified for correlated (r(2) > 0.80) SNPs within signal transducer and activator of transcription 3 (STAT3) [odds ratio (OR), 2.24; 95% confidence interval (CI), 1.32-3.78; p = 0.0027], after adjustment for age, population stratification, grade and residual disease. At the gene level, STAT3 was significantly associated with an IR to therapy (pAML = 0.006). rs1053004, a STAT3 SNP in a putative miRNA-binding site, was associated with STAT3 expression (p = 0.057). This is the first study to identify germline STAT3 variants as independent predictors of an unfavorable therapeutic response for EOC patients. Findings suggest that STAT3 genotype may identify high-risk women likely to respond more favorably to novel therapeutic combinations that include STAT3 inhibitors.
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Affiliation(s)
| | - William J Fulp
- Statistical Center for HIV/AIDS Research and Prevention (SCHARP), Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Brett M Reid
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL
| | - Zhihua Chen
- Department of Biostatistics and Bioinformatics, Moffitt Cancer Center, Tampa, FL
| | | | - Jin Q Cheng
- Department of Molecular Oncology, Moffitt Cancer Center, Tampa, FL
| | | | - Dung-Tsa Chen
- Department of Biostatistics and Bioinformatics, Moffitt Cancer Center, Tampa, FL
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175
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Kim HS, Kim DC, Kim HM, Kwon HJ, Kwon SJ, Kang SJ, Kim SC, Choi GE. STAT1 deficiency redirects IFN signalling toward suppression of TLR response through a feedback activation of STAT3. Sci Rep 2015; 5:13414. [PMID: 26299368 PMCID: PMC4547106 DOI: 10.1038/srep13414] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 07/27/2015] [Indexed: 01/14/2023] Open
Abstract
Interferons (IFNs) potentiate macrophage activation typically via a STAT1-dependent pathway. Recent studies suggest a functioning of STAT1-independent pathway in the regulation of gene expression by IFN-γ, thus pointing to the diversity in cellular responses to IFNs. Many functions of IFNs rely on cross-regulation of the responses to exogenous inflammatory mediators such as TLR ligands. Here we investigated the contribution of STAT1-independent pathway to macrophage activation and its underlying mechanism in the context of combined stimulation of IFN and TLR. We found that TLR-induced production of inflammatory cytokines (TNF-α, IL-12) was not simply nullified but was significantly suppressed by signaling common to IFN-γ and IFN-β in STAT1-null macrophages. Such a shift in the suppression of TLR response correlated with a sustained STAT3 activation and attenuation of NF-κB signaling. Using a JAK2/STAT3 pathway inhibitor or STAT3-specific siRNA, blocking STAT3 in that context restored TNF-α production and NF-κB signaling, thus indicating a functional cross-regulation among STAT1, STAT3, and NF-κB. Our results suggest that STAT1 deficiency reprograms IFN signaling from priming toward suppression of TLR response via feedback regulation of STAT3, which may provide a new insight into the host defense response against microbial pathogens in a situation of STAT1 deficiency.
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Affiliation(s)
- Hun Sik Kim
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea.,Cellular Dysfunction Research Center, University of Ulsan College of Medicine, Seoul 138-736, Korea.,Department of Microbiology, University of Ulsan College of Medicine, Seoul 138-736, Korea
| | - Dong Chan Kim
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea
| | - Hong-Mi Kim
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea
| | - Hyung-Joon Kwon
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea.,Cellular Dysfunction Research Center, University of Ulsan College of Medicine, Seoul 138-736, Korea
| | - Soon Jae Kwon
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea
| | - Suk-Jo Kang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea
| | - Sun Chang Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea
| | - Go-Eun Choi
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 138-736, Korea.,Cellular Dysfunction Research Center, University of Ulsan College of Medicine, Seoul 138-736, Korea
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176
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Abstract
Breast cancer is among the most commonly diagnosed cancer types in women worldwide and is the second leading cause of cancer-related disease in the USA. SH2 domains recruit signaling proteins to phosphotyrosine residues on aberrantly activated growth factor and cytokine receptors and contribute to cancer cell cycling, metastasis, angiogenesis and so on. Herein we review phosphopeptide mimetic and small-molecule approaches targeting the SH2 domains of Grb2, Grb7 and STAT3 that inhibit their targets and reduce proliferation in in vitro breast cancer models. Only STAT3 inhibitors have been evaluated in in vivo models and have led to tumor reduction. Taken together, these studies suggest that targeting SH2 domains is an important approach to the treatment of breast cancer.
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177
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Lau J, Ilkhanizadeh S, Wang S, Miroshnikova YA, Salvatierra NA, Wong RA, Schmidt C, Weaver VM, Weiss WA, Persson AI. STAT3 Blockade Inhibits Radiation-Induced Malignant Progression in Glioma. Cancer Res 2015; 75:4302-11. [PMID: 26282165 DOI: 10.1158/0008-5472.can-14-3331] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 07/05/2015] [Indexed: 12/31/2022]
Abstract
High grade gliomas (HGG) are classified into four subgroups based on transcriptional signatures and phenotypic characteristics. In particular, the proneural-to-mesenchymal transition (PMT) is associated with increased malignancy, poor prognosis, and disease recurrence, but the underlying causes of PMT are still unclear. In this study, we investigated whether radiotherapy promotes PMT using a genetically engineered mouse model of proneural HGG. We found that cranial ionizing radiation induced robust and durable PMT in tumors. Additionally, we isolated primary proneural HGG cells from mouse and human tumors and demonstrate that radiation induced a sustained cell-intrinsic mesenchymal transition associated with increased invasiveness and resistance to the alkylating agent temozolomide. Expectedly, irradiation-induced PMT was also associated with activation of the STAT3 transcription factor, and the combination of STAT3 blockade using JAK2 inhibitors with radiation abrogated the mesenchymal transition and extended survival of mice. Taken together, our data suggest that clinical JAK2 inhibitors should be tested in conjunction with radiation in patients with proneural HGG as a new strategy for blocking the emergence of therapy-resistant mesenchymal tumors at relapse.
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Affiliation(s)
- Jasmine Lau
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California. Agency for Science, Technology and Research (A*STAR), Singapore Immunology Network (SIgN), Singapore
| | - Shirin Ilkhanizadeh
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Susan Wang
- Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California. Sandler Neurosciences Center, University of California, San Francisco, San Francisco, California
| | - Yekaterina A Miroshnikova
- Department of Surgery and Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, California
| | - Nicolas A Salvatierra
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Robyn A Wong
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Christin Schmidt
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Valerie M Weaver
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California. Department of Surgery and Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, California. Departments of Anatomy and Bioengineering and Therapeutic Sciences, and Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, California
| | - William A Weiss
- Department of Pediatrics, University of California, San Francisco, San Francisco, California. Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California.
| | - Anders I Persson
- Department of Neurology, Neurological Surgery and Brain Tumor Research Center, University of California, San Francisco, San Francisco, California. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California. Sandler Neurosciences Center, University of California, San Francisco, San Francisco, California.
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178
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Pencik J, Schlederer M, Gruber W, Unger C, Walker SM, Chalaris A, Marié IJ, Hassler MR, Javaheri T, Aksoy O, Blayney JK, Prutsch N, Skucha A, Herac M, Krämer OH, Mazal P, Grebien F, Egger G, Poli V, Mikulits W, Eferl R, Esterbauer H, Kennedy R, Fend F, Scharpf M, Braun M, Perner S, Levy DE, Malcolm T, Turner SD, Haitel A, Susani M, Moazzami A, Rose-John S, Aberger F, Merkel O, Moriggl R, Culig Z, Dolznig H, Kenner L. STAT3 regulated ARF expression suppresses prostate cancer metastasis. Nat Commun 2015. [PMID: 26198641 PMCID: PMC4525303 DOI: 10.1038/ncomms8736] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Prostate cancer (PCa) is the most prevalent cancer in men. Hyperactive STAT3 is thought to be oncogenic in PCa. However, targeting of the IL-6/STAT3 axis in PCa patients has failed to provide therapeutic benefit. Here we show that genetic inactivation of Stat3 or IL-6 signalling in a Pten-deficient PCa mouse model accelerates cancer progression leading to metastasis. Mechanistically, we identify p19ARF as a direct Stat3 target. Loss of Stat3 signalling disrupts the ARF–Mdm2–p53 tumour suppressor axis bypassing senescence. Strikingly, we also identify STAT3 and CDKN2A mutations in primary human PCa. STAT3 and CDKN2A deletions co-occurred with high frequency in PCa metastases. In accordance, loss of STAT3 and p14ARF expression in patient tumours correlates with increased risk of disease recurrence and metastatic PCa. Thus, STAT3 and ARF may be prognostic markers to stratify high from low risk PCa patients. Our findings challenge the current discussion on therapeutic benefit or risk of IL-6/STAT3 inhibition. IL6-STAT3 signaling is activated in prostate cancer, however inhibiting this pathway has not lead to a survival advantage in patients. Here, Pencik et al. show that loss of the IL6-STAT3 axis in mice and humans leads to metastasis due to loss of ARF, unravelling STAT3 and ARF as potential prognostic markers in prostate cancer.
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Affiliation(s)
- Jan Pencik
- 1] Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria. [2] Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Michaela Schlederer
- 1] Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria [2] Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Wolfgang Gruber
- Department of Molecular Biology, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria
| | - Christine Unger
- Institute of Medical Genetics, Medical University of Vienna, 1090 Vienna, Austria
| | - Steven M Walker
- Center for Cancer Research and Cell Biology, Queen's University Belfast, BT7 1NN Belfast, UK
| | - Athena Chalaris
- Institute of Biochemistry, University of Kiel, 24098 Kiel, Germany
| | - Isabelle J Marié
- 1] Department of Pathology and NYU Cancer Institute, NYU School of Medicine, New York 10016, USA [2] Department of Microbiology and NYU Cancer Institute, NYU School of Medicine, New York 10016, USA
| | - Melanie R Hassler
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Tahereh Javaheri
- Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria
| | - Osman Aksoy
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Jaine K Blayney
- NI Stratified Medicine Research Group, University of Ulster, BT47 6SB Londonderry, UK
| | - Nicole Prutsch
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Anna Skucha
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Merima Herac
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Oliver H Krämer
- Department of Toxicology, University Medical Center, 55131 Mainz, Germany
| | - Peter Mazal
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Florian Grebien
- Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria
| | - Gerda Egger
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Valeria Poli
- Molecular Biotechnology Center (MBC), Department of Genetics, Biology and Biochemistry, University of Turin, Turin 10126, Italy
| | - Wolfgang Mikulits
- Department of Medicine I, Division: Institute for Cancer Research, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria
| | - Robert Eferl
- Department of Medicine I, Division: Institute for Cancer Research, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria
| | - Harald Esterbauer
- Department of Laboratory Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Richard Kennedy
- Center for Cancer Research and Cell Biology, Queen's University Belfast, BT7 1NN Belfast, UK
| | - Falko Fend
- Institute of Pathology and Neuropathology, University Hospital Tuebingen, 72076 Tuebingen, Germany
| | - Marcus Scharpf
- Institute of Pathology and Neuropathology, University Hospital Tuebingen, 72076 Tuebingen, Germany
| | - Martin Braun
- Institute of Pathology, Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, 53127 Bonn, Germany
| | - Sven Perner
- Institute of Pathology, Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, 53127 Bonn, Germany
| | - David E Levy
- 1] Department of Pathology and NYU Cancer Institute, NYU School of Medicine, New York 10016, USA [2] Department of Microbiology and NYU Cancer Institute, NYU School of Medicine, New York 10016, USA
| | - Tim Malcolm
- Department of Pathology, University of Cambridge, CB2 0QQ Cambridge, UK
| | - Suzanne D Turner
- Department of Pathology, University of Cambridge, CB2 0QQ Cambridge, UK
| | - Andrea Haitel
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Martin Susani
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Ali Moazzami
- Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden
| | - Stefan Rose-John
- Institute of Biochemistry, University of Kiel, 24098 Kiel, Germany
| | - Fritz Aberger
- Department of Molecular Biology, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria
| | - Olaf Merkel
- Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Richard Moriggl
- 1] Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria [2] Unit for Translational Methods in Cancer Research, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Zoran Culig
- Department of Urology, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Helmut Dolznig
- Institute of Medical Genetics, Medical University of Vienna, 1090 Vienna, Austria
| | - Lukas Kenner
- 1] Ludwig Boltzmann Institute for Cancer Research, Waehringerstrasse 13A, 1090 Vienna, Austria [2] Clinical Institute of Pathology, Medical University of Vienna, 1090 Vienna, Austria [3] Unit of Pathology of Laboratory Animals (UPLA), University of Veterinary Medicine Vienna, 1210 Vienna, Austria
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179
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Carson R, Celtikci B, Fenning C, Javadi A, Crawford N, Carbonell LP, Lawler M, Longley DB, Johnston PG, Van Schaeybroeck S. HDAC Inhibition Overcomes Acute Resistance to MEK Inhibition in BRAF-Mutant Colorectal Cancer by Downregulation of c-FLIPL. Clin Cancer Res 2015; 21:3230-3240. [PMID: 25813020 PMCID: PMC4504978 DOI: 10.1158/1078-0432.ccr-14-2701] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 03/06/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE Activating mutations in the BRAF oncogene are found in 8% to 15% of colorectal cancer patients and have been associated with poor survival. In contrast with BRAF-mutant (MT) melanoma, inhibition of the MAPK pathway is ineffective in the majority of BRAFMT colorectal cancer patients. Therefore, identification of novel therapies for BRAFMT colorectal cancer is urgently needed. EXPERIMENTAL DESIGN BRAFMT and wild-type (WT) colorectal cancer models were assessed in vitro and in vivo. Small-molecule inhibitors of MEK1/2, MET, and HDAC were used, overexpression and siRNA approaches were applied, and cell death was assessed by flow cytometry, Western blotting, cell viability, and caspase activity assays. RESULTS Increased c-MET-STAT3 signaling was identified as a novel adaptive resistance mechanism to MEK inhibitors (MEKi) in BRAFMT colorectal cancer models in vitro and in vivo. Moreover, MEKi treatment resulted in acute increases in transcription of the endogenous caspase-8 inhibitor c-FLIPL in BRAFMT cells, but not in BRAFWT cells, and inhibition of STAT3 activity abrogated MEKi-induced c-FLIPL expression. In addition, treatment with c-FLIP-specific siRNA or HDAC inhibitors abrogated MEKi-induced upregulation of c-FLIPL expression and resulted in significant increases in MEKi-induced cell death in BRAFMT colorectal cancer cells. Notably, combined HDAC inhibitor/MEKi treatment resulted in dramatically attenuated tumor growth in BRAFMT xenografts. CONCLUSIONS Our findings indicate that c-MET/STAT3-dependent upregulation of c-FLIPL expression is an important escape mechanism following MEKi treatment in BRAFMT colorectal cancer. Thus, combinations of MEKi with inhibitors of c-MET or c-FLIP (e.g., HDAC inhibitors) could be potential novel treatment strategies for BRAFMT colorectal cancer.
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Affiliation(s)
- Robbie Carson
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Basak Celtikci
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Cathy Fenning
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Arman Javadi
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Nyree Crawford
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Lucia Perez Carbonell
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Mark Lawler
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Daniel B. Longley
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Patrick G. Johnston
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Sandra Van Schaeybroeck
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
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180
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Tan Q, Wang H, Hu Y, Hu M, Li X, Aodengqimuge, Ma Y, Wei C, Song L. Src/STAT3-dependent heme oxygenase-1 induction mediates chemoresistance of breast cancer cells to doxorubicin by promoting autophagy. Cancer Sci 2015; 106:1023-32. [PMID: 26041409 PMCID: PMC4556392 DOI: 10.1111/cas.12712] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 12/15/2022] Open
Abstract
Chemotherapeutic resistance in breast cancer, whether acquired or intrinsic, remains a major clinical obstacle. Thus, increasing tumor cell sensitivity to chemotherapeutic agents will be helpful in improving the clinical management of breast cancer. In the present study, we found an induction of HO-1 expression in doxorubicin (DOX)-treated MDA-MB-231 human breast adenocarcinoma cells, which showed insensitivity to DOX treatment. Knockdown HO-1 expression dramatically upregulated the incidence of MDA-MB-231 cell death under DOX treatment, indicating that HO-1 functions as a critical contributor to drug resistance in MDA-MB-231 cells. We further observed that DOX exposure induced a cytoprotective autophagic flux in MDA-MB-231 cells, which was dependent on HO-1 induction. Moreover, upregulation of HO-1 expression required the activation of both signal transducer and activator of transcription (STAT)3 and its upstream regulator, protein kinase Src. Abrogating Src/STAT3 pathway activation attenuated HO-1 and autophagy induction, thus increasing the chemosensitivity of MDA-MB-231 cells. Therefore, we conclude that Src/STAT3-dependent HO-1 induction protects MDA-MB-231 breast cancer cells from DOX-induced death through promoting autophagy. In the following study, we further demonstrated the contribution of Src/STAT3/HO-1/autophagy pathway activation to DOX resistance in another breast cancer cell line, MDA-MB-468, which bears a similar phenotype to MDA-MB-231 cells. Therefore, activation of Src/STAT3/HO-1/autophagy signaling pathway might play a general role in protecting certain subtypes of breast cancer cells from DOX-induced cytotoxicity. Targeting this signaling event may provide a potential approach for overcoming DOX resistance in breast cancer therapeutics.
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Affiliation(s)
- Qixing Tan
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China.,Department of Breast Surgery, Guangxi Medical University Tumor Hospital, Nanning, China
| | - Hongli Wang
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China.,Laboratory of Cellular and Molecular Immunology, School of Medicine, Henan University, Kaifeng, China
| | - Yongliang Hu
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Meiru Hu
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China
| | - Xiaoguang Li
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China.,Department of New Drug Screening Center, China Pharmaceutical University, Nanjing, China
| | - Aodengqimuge
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China.,Department of New Drug Screening Center, China Pharmaceutical University, Nanjing, China
| | - Yuanfang Ma
- Laboratory of Cellular and Molecular Immunology, School of Medicine, Henan University, Kaifeng, China
| | - Changyuan Wei
- Department of Breast Surgery, Guangxi Medical University Tumor Hospital, Nanning, China
| | - Lun Song
- Department of Stress Medicine, Beijing Institute of Basic Medical Sciences, Beijing, China
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181
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STAT3 activation is associated with cerebrospinal fluid interleukin-10 (IL-10) in primary central nervous system diffuse large B cell lymphoma. J Neurooncol 2015; 124:165-74. [PMID: 26080800 DOI: 10.1007/s11060-015-1843-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 06/08/2015] [Indexed: 12/30/2022]
Abstract
Signal transducers and activators of transcription 3 (STAT3) are activated by various cytokines and oncogenes; however, the activity and pathogenesis of STAT3 in diffuse large B cell lymphoma of the central nervous system have not been thoroughly elucidated. We investigated the phosphorylation levels of STAT3 in 40 specimens of primary central nervous system diffuse large B-cell lymphoma (PCNS DLBCL) and analyzed the association between phsopho-STAT3 (pSTAT3) expression and cerebrospinal fluid (CSF) concentration of interleukin-10 (IL-10) or IL-6. Immunohistochemistry and Western blot analysis revealed that most of the specimens in PCNS DLBCL expressed pSTST3 protein, and a strong phosphorylation levels of STAT3 was statistically associated with high CSF IL-10 levels, but not with CSF IL-6 levels. Next, we demonstrated that recombinant IL-10 and CSF containing IL-10 induced the phosphorylation of STAT3 in PCNS DLBCL cells. Furthermore, molecular subtype classified by Hans' algorithm was correlated with pSTAT3 expression levels and CSF IL-10 levels. These results suggest that the STAT3 activity is correlated with CSF IL-10 level, which is a useful marker for STAT3 activity in PCNS DLBCLs.
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182
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Maenhout SK, Du Four S, Corthals J, Neyns B, Thielemans K, Aerts JL. AZD1480 delays tumor growth in a melanoma model while enhancing the suppressive activity of myeloid-derived suppressor cells. Oncotarget 2015; 5:6801-15. [PMID: 25149535 PMCID: PMC4196164 DOI: 10.18632/oncotarget.2254] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
AZD1480 is a potent, competitive small-molecule inhibitor of JAK1/2 kinase which inhibits STAT3 phosphorylation and tumor growth. Here we investigated the effects of AZD1480 on the function of different immune cell populations in a melanoma model. When MO4 tumor-bearing mice were treated with AZD1480 we observed a strong inhibition of tumor growth as well as a prolonged survival. Moreover, a significant decrease in the percentage of myeloid-derived suppressor cells (MDSCs) was observed after treatment with AZD1480. However, AZD1480 enhanced the suppressive capacity of murine MDSCs while at the same time impairing the proliferative as well as the IFN-γ secretion capacity of murine T cells. The addition of AZD1480 to co-cultures of human MDSCs and T cells does not affect the suppressive activity of MDSCs but it does reduce the IFN-γ secretion and the proliferative capacity of T cells. We showed that although AZD1480 has the ability to delay the tumor growth of MO4 tumor-bearing mice, this drug has detrimental effects on several aspects of the immune system. These data indicate that systemic targeting of the JAK/STAT pathway by JAK1/2 inhibition can have divergent effects on tumor growth and anti-tumor immune responses.
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Affiliation(s)
- Sarah K Maenhout
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Stephanie Du Four
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium. Department of Medical Oncology, Universiteit Ziekenhuis Brussel, Brussels, Belgium
| | - Jurgen Corthals
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Bart Neyns
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium. Department of Medical Oncology, Universiteit Ziekenhuis Brussel, Brussels, Belgium
| | - Kris Thielemans
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Joeri L Aerts
- Laboratory of Molecular and Cellular Therapy, Department of Immunology-Physiology, Vrije Universiteit Brussel, Brussels, Belgium
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183
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Liao Z, Gu L, Vergalli J, Mariani SA, De Dominici M, Lokareddy RK, Dagvadorj A, Purushottamachar P, McCue PA, Trabulsi E, Lallas CD, Gupta S, Ellsworth E, Blackmon S, Ertel A, Fortina P, Leiby B, Xia G, Rui H, Hoang DT, Gomella LG, Cingolani G, Njar V, Pattabiraman N, Calabretta B, Nevalainen MT. Structure-Based Screen Identifies a Potent Small Molecule Inhibitor of Stat5a/b with Therapeutic Potential for Prostate Cancer and Chronic Myeloid Leukemia. Mol Cancer Ther 2015; 14:1777-93. [PMID: 26026053 DOI: 10.1158/1535-7163.mct-14-0883] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 04/15/2015] [Indexed: 11/16/2022]
Abstract
Bypassing tyrosine kinases responsible for Stat5a/b phosphorylation would be advantageous for therapy development for Stat5a/b-regulated cancers. Here, we sought to identify small molecule inhibitors of Stat5a/b for lead optimization and therapy development for prostate cancer and Bcr-Abl-driven leukemias. In silico screening of chemical structure databases combined with medicinal chemistry was used for identification of a panel of small molecule inhibitors to block SH2 domain-mediated docking of Stat5a/b to the receptor-kinase complex and subsequent phosphorylation and dimerization. We tested the efficacy of the lead compound IST5-002 in experimental models and patient samples of two known Stat5a/b-driven cancers, prostate cancer and chronic myeloid leukemia (CML). The lead compound inhibitor of Stat5-002 (IST5-002) prevented both Jak2 and Bcr-Abl-mediated phosphorylation and dimerization of Stat5a/b, and selectively inhibited transcriptional activity of Stat5a (IC50 = 1.5μmol/L) and Stat5b (IC50 = 3.5 μmol/L). IST5-002 suppressed nuclear translocation of Stat5a/b, binding to DNA and Stat5a/b target gene expression. IST5-002 induced extensive apoptosis of prostate cancer cells, impaired growth of prostate cancer xenograft tumors, and induced cell death in patient-derived prostate cancers when tested ex vivo in explant organ cultures. Importantly, IST5-002 induced robust apoptotic death not only of imatinib-sensitive but also of imatinib-resistant CML cell lines and primary CML cells from patients. IST5-002 provides a lead structure for further chemical modifications for clinical development for Stat5a/b-driven solid tumors and hematologic malignancies.
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Affiliation(s)
- Zhiyong Liao
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Lei Gu
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jenny Vergalli
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Samanta A Mariani
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Marco De Dominici
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Ravi K Lokareddy
- Department of Biochemistry, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Ayush Dagvadorj
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Puranik Purushottamachar
- School of Pharmacy, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Peter A McCue
- Department of Pathology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Edouard Trabulsi
- Department of Urology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Costas D Lallas
- Department of Urology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Shilpa Gupta
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Elyse Ellsworth
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Shauna Blackmon
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Adam Ertel
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Paolo Fortina
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Benjamin Leiby
- Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Guanjun Xia
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Hallgeir Rui
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Pathology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - David T Hoang
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Leonard G Gomella
- Department of Urology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Gino Cingolani
- Department of Biochemistry, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Vincent Njar
- School of Pharmacy, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Nagarajan Pattabiraman
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, District of Columbia
| | - Bruno Calabretta
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Marja T Nevalainen
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Urology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania. Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania.
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184
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Kang HJ, Yi YW, Hou SJ, Kim HJ, Kong Y, Bae I, Brown ML. Disruption of STAT3-DNMT1 interaction by SH-I-14 induces re-expression of tumor suppressor genes and inhibits growth of triple-negative breast tumor. Oncotarget 2015; 8:83457-83468. [PMID: 29137356 PMCID: PMC5663528 DOI: 10.18632/oncotarget.4054] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 04/08/2015] [Indexed: 01/01/2023] Open
Abstract
Epigenetic regulation of gene expression is an emerging target to treat several human diseases including cancers. In cancers, expressions of many tumor suppressor genes are suppressed by hyper-methylation in their regulatory regions. Herein, we describe a novel carbazole SH-I-14 that decreased the level of the acetyl-STAT3 at the K685 residue. Mutation analysis revealed that SH-I-14 disrupted STAT3-DNMT1 interaction by removing acetyl group from K685 of STAT3. Finally, the inhibition of STAT3-DNMT1 interaction by SH-I-14 resulted in re-expression of tumor suppressor genes such as VHL and PDLIM4 through de-methylation of their promoter regions. In addition, SH-I-14 showed anti-proliferative effect in triple-negative breast cancer (TNBC) cell lines in vitro and anti-tumor effect in a mouse xenograft model of MDA-MB-231 tumor. Taken together, our results suggest that targeting acetyl-STAT3 (K685) provides potential therapeutic opportunity to treat a subset of human cancers.
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Affiliation(s)
- Hyo Jin Kang
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA
| | - Yong Weon Yi
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA
| | - Shu-Jie Hou
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA.,Center for Drug Discovery, Georgetown University Medical Center, Washington, DC, USA
| | - Hee Jeong Kim
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA
| | - Yali Kong
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA.,Center for Drug Discovery, Georgetown University Medical Center, Washington, DC, USA
| | - Insoo Bae
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA.,Department of Radiation Medicine, Georgetown University Medical Center, Washington, DC, USA.,Center for Drug Discovery, Georgetown University Medical Center, Washington, DC, USA.,Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Milton L Brown
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA.,Center for Drug Discovery, Georgetown University Medical Center, Washington, DC, USA.,Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
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185
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Liu X, Ji Q, Ye N, Sui H, Zhou L, Zhu H, Fan Z, Cai J, Li Q. Berberine Inhibits Invasion and Metastasis of Colorectal Cancer Cells via COX-2/PGE2 Mediated JAK2/STAT3 Signaling Pathway. PLoS One 2015; 10:e0123478. [PMID: 25954974 PMCID: PMC4425560 DOI: 10.1371/journal.pone.0123478] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 02/18/2015] [Indexed: 12/17/2022] Open
Abstract
Berberin, extracted from Chinese herbal medicine Coptis chinensis, has been found to have anti-tumor activities. However, the underlying mechanisms have not been fully elucidated. Our current study demonstrated that berberin inhibited the in vitro and in vivo growth, migration/invasion of CRC cells, via attenuating the expression levels of COX-2/PGE2, following by reducing the phosphorylation of JAK2 and STAT3, as well as the MMP-2/-9 expression. We further clarified that an increase of COX-2/PGE2 expression offset the repressive activity of Berberin on JAK2/STAT3 signaling, and a JAK2 inhibitor AZD1480 blocked the effect of COX-2/PGE2 on MMP-2/-9 expression. In summary, Berberin inhibited CRC invasion and metastasis via down-regulation of COX-2/PGE2- JAK2/STAT3 signaling pathway.
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Affiliation(s)
- Xuan Liu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qing Ji
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Naijing Ye
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hua Sui
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lihong Zhou
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Huirong Zhu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhongze Fan
- Interventional Cancer Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, Florida, United States of America
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- * E-mail:
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186
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Wang X, Qiu W, Zhang G, Xu S, Gao Q, Yang Z. MicroRNA-204 targets JAK2 in breast cancer and induces cell apoptosis through the STAT3/BCl-2/survivin pathway. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:5017-5025. [PMID: 26191195 PMCID: PMC4503067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Accepted: 04/13/2015] [Indexed: 06/04/2023]
Abstract
MicroRNAs (miRNAs) have emerged as important regulators that potentially play critical roles in cancer cell biological processes. Previous studies have shown that miR-204 plays an important role in various human cancers. However, the underlying mechanisms of this microRNA in breast cancer remain largely unknown. In the present study, we investigated that miR-204 expression level was markedly reduced in both the human breast cancer tissue and cultured breast cancer cell lines (MCF-7, MDA-MB-231). Overexpression of miR-204 inhibited the proliferation and promoted the apoptosis in breast cancer cells, which were reversed by co-transfection of miR-204 inhibitor. We validated that Janus kinase 2 (JAK2), as a direct target of miR-204, is overexpressed in breast cancer. Knockdown of JAK2 suppressed cell viability and induced apoptosis in breast cancer cells. Moreover, the level of miR-204 is negatively correlated with p-STAT3 and anti-apoptotic genes BCl-2 and surviving in breast cancer. In conclusions, miR-204 targets JAK2 and suppressed JAK2 and p-JAK2 expression in breast cancer, which further inhibit the activation of STAT3, BCl-2 and survivin. These findings indicate that manipulation of miR-204 expression may represent a novel therapeutic strategy in the treatment of breast cancer.
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Affiliation(s)
- Xilong Wang
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
| | - Wenxiu Qiu
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
| | - Guoqiang Zhang
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
| | - Shujian Xu
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
| | - Qiang Gao
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
| | - Zhenlin Yang
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College Binzhou 256603, China
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187
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Synergistic anti-tumor effect of combined inhibition of EGFR and JAK/STAT3 pathways in human ovarian cancer. Mol Cancer 2015; 14:100. [PMID: 25928246 PMCID: PMC4437681 DOI: 10.1186/s12943-015-0366-5] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 04/10/2015] [Indexed: 01/05/2023] Open
Abstract
Background The EGFR signaling pathway is frequently activated in human ovarian cancer and associated with poor prognosis. However, inhibition of EGFR signaling in patients with recurrent ovarian cancer has been disappointing. It remains to be addressed whether ovarian cancer patients could benefit from targeting EGFR signaling. Here we investigated the mechanisms underlying the resistance to EGFR inhibition in ovarian cancer and developed a strategy to overcome it. Results We found that treatment of human ovarian cancer cells with an EGFR inhibitor, gefitinib, resulted in increased STAT3 phosphorylation in a dose- and time-dependent manner. Inhibiting STAT3 activation with a small molecule inhibitor of JAK, an upstream kinase that phosphorylates and activates STAT3, synergistically increased the anti-tumor activity of gefitinib in vitro. Similar results were obtained when STAT3 or JAK1 expression was knocked down. In contrast, inhibiting other signaling pathways, such as AKT/mTOR, MEK or SRC, was relatively less effective. The combined treatment resulted in simultaneous attenuation of multiple survival pathways and increased inhibition of ERK pathway. In addition, the dual inhibition showed a stronger suppression of xenograft tumor growth than either single inhibition. Conclusions Our findings demonstrate that feedback activation of STAT3 pathway might contribute to the resistance to EGFR inhibition. Combined blockade of both pathways appears to be more effective against human ovarian cancer than inhibition of each pathway alone both in vitro and in vivo. This study may provide a strategy to improve clinical benefit of targeting EGFR pathway in ovarian cancer patients.
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188
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Ko AH. Progress in the treatment of metastatic pancreatic cancer and the search for next opportunities. J Clin Oncol 2015; 33:1779-86. [PMID: 25918299 DOI: 10.1200/jco.2014.59.7625] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A growing number of therapeutic options are now available for patients with metastatic pancreatic cancer, informed by positive results from recently completed phase III clinical trials. These have led to modest, if not necessarily transformative, improvements in clinical outcomes. Although the standard of care for metastatic disease remains cytotoxic therapy, a variety of novel therapeutic approaches are currently under active investigation, several of which have already demonstrated encouraging results in phase I/II studies. The following three broad categories (with significant overlap among them) are highlighted here: stromal-depleting agents, immunotherapies, and signal transduction inhibitors. The mechanistic rationale, limitations, and promise of each of these strategies specific to pancreatic cancer are discussed, as are the aspects of this disease and this patient population that pose ongoing challenges in terms of both therapeutic management and biomarker-driven trial design.
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Affiliation(s)
- Andrew H Ko
- From the University of California San Francisco Comprehensive Cancer Center, San Francisco, CA.
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189
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Wake MS, Watson CJ. STAT3 the oncogene - still eluding therapy? FEBS J 2015; 282:2600-11. [DOI: 10.1111/febs.13285] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/04/2015] [Accepted: 03/26/2015] [Indexed: 02/06/2023]
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190
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PAX5 is a tumor suppressor in mouse mutagenesis models of acute lymphoblastic leukemia. Blood 2015; 125:3609-17. [PMID: 25855603 DOI: 10.1182/blood-2015-02-626127] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 03/31/2015] [Indexed: 12/13/2022] Open
Abstract
Alterations of genes encoding transcriptional regulators of lymphoid development are a hallmark of B-progenitor acute lymphoblastic leukemia (B-ALL) and most commonly involve PAX5, encoding the DNA-binding transcription factor paired-box 5. The majority of PAX5 alterations in ALL are heterozygous, and key PAX5 target genes are expressed in leukemic cells, suggesting that PAX5 may be a haploinsufficient tumor suppressor. To examine the role of PAX5 alterations in leukemogenesis, we performed mutagenesis screens of mice heterozygous for a loss-of-function Pax5 allele. Both chemical and retroviral mutagenesis resulted in a significantly increased penetrance and reduced latency of leukemia, with a shift to B-lymphoid lineage. Genomic profiling identified a high frequency of secondary genomic mutations, deletions, and retroviral insertions targeting B-lymphoid development, including Pax5, and additional genes and pathways mutated in ALL, including tumor suppressors, Ras, and Janus kinase-signal transducer and activator of transcription signaling. These results show that in contrast to simple Pax5 haploinsufficiency, multiple sequential alterations targeting lymphoid development are central to leukemogenesis and contribute to the arrest in lymphoid maturation characteristic of ALL. This cross-species analysis also validates the importance of concomitant alterations of multiple cellular growth, signaling, and tumor suppression pathways in the pathogenesis of B-ALL.
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191
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Gritsina G, Xiao F, O'Brien SW, Gabbasov R, Maglaty MA, Xu RH, Thapa RJ, Zhou Y, Nicolas E, Litwin S, Balachandran S, Sigal LJ, Huszar D, Connolly DC. Targeted Blockade of JAK/STAT3 Signaling Inhibits Ovarian Carcinoma Growth. Mol Cancer Ther 2015; 14:1035-47. [PMID: 25646015 PMCID: PMC4394029 DOI: 10.1158/1535-7163.mct-14-0800] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/26/2015] [Indexed: 12/22/2022]
Abstract
Ovarian carcinoma is the fifth leading cause of death among women in the United States. Persistent activation of STAT3 is frequently detected in ovarian carcinoma. STAT3 is activated by Janus family kinases (JAK) via cytokine receptors, growth factor receptor, and non-growth factor receptor tyrosine kinases. Activation of STAT3 mediates tumor cell proliferation, survival, motility, invasion, and angiogenesis, and recent work demonstrates that STAT3 activation suppresses antitumor immune responses and supports tumor-promoting inflammation. We hypothesized that therapeutic targeting of the JAK/STAT3 pathway would inhibit tumor growth by direct effects on ovarian carcinoma cells and by inhibition of cells in the tumor microenvironment (TME). To test this, we evaluated the effects of a small-molecule JAK inhibitor, AZD1480, on cell viability, apoptosis, proliferation, migration, and adhesion of ovarian carcinoma cells in vitro. We then evaluated the effects of AZD1480 on in vivo tumor growth and progression, gene expression, tumor-associated matrix metalloproteinase (MMP) activity, and immune cell populations in a transgenic mouse model of ovarian carcinoma. AZD1480 treatment inhibited STAT3 phosphorylation and DNA binding, and migration and adhesion of cultured ovarian carcinoma cells and ovarian tumor growth rate, volume, and ascites production in mice. In addition, drug treatment led to altered gene expression, decreased tumor-associated MMP activity, and fewer suppressor T cells in the peritoneal TME of tumor-bearing mice than control mice. Taken together, our results show pharmacologic inhibition of the JAK2/STAT3 pathway leads to disruption of functions essential for ovarian tumor growth and progression and represents a promising therapeutic strategy.
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Affiliation(s)
- Galina Gritsina
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Fang Xiao
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Shane W O'Brien
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Rashid Gabbasov
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania. Kazan (Volga Region) Federal University, Kazan, Russia
| | - Marisa A Maglaty
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Ren-Huan Xu
- Immune Cell Development and Host Defense Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Roshan J Thapa
- Immune Cell Development and Host Defense Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yan Zhou
- Biostatistics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | | | - Samuel Litwin
- Biostatistics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Siddharth Balachandran
- Immune Cell Development and Host Defense Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Luis J Sigal
- Immune Cell Development and Host Defense Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | | | - Denise C Connolly
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania.
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192
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Mali SB. Review of STAT3 (Signal Transducers and Activators of Transcription) in head and neck cancer. Oral Oncol 2015; 51:565-9. [PMID: 25817923 DOI: 10.1016/j.oraloncology.2015.03.004] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 02/25/2015] [Accepted: 03/10/2015] [Indexed: 12/14/2022]
Abstract
STATs can be activated independently of JAKs, most notably by c-Src kinases. In cancer cells, STAT3 and STAT5 activation leads to the increased expression of downstream target genes, leading to increased cell proliferation, cell survival, angiogenesis, and immune system evasion. STAT3 and STAT5 are expressed and activated in head and neck squamous cell carcinoma where they contribute to cell survival and proliferation. STATs can be activated by a number of signal transduction pathways, including the epidermal growth factor receptor (EGFR), nicotinic receptor, interleukin (IL) receptor, and erythropoietin receptor pathways. Identifying agents that inhibit STAT-3, a cytosolic transcription factor involved in the activation of various genes implicated in tumor progression is a promising strategy for cancer chemoprevention. Several approaches have been used to inhibit STAT3 in the hope of developing an antitumor agent. Although several STAT3-specific agents are promising, none are in clinical development, mostly because of drug delivery and stability issues.
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193
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Pan D, Xu L, Liu H, Zhang W, Liu W, Liu Y, Fu Q, Xu J. High expression of interleukin-11 is an independent indicator of poor prognosis in clear-cell renal cell carcinoma. Cancer Sci 2015; 106:592-7. [PMID: 25702890 PMCID: PMC4452160 DOI: 10.1111/cas.12638] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 02/05/2015] [Accepted: 02/12/2015] [Indexed: 01/16/2023] Open
Abstract
Interleukin-11 (IL-11), a member of the IL-6 family of cytokines, exerts pleiotropic oncogenic activities by stimulating angiogenesis and metastasis in many cancer types. The present study aims to evaluate the impact of IL-11 expression on recurrence and mortality of patients with clear-cell renal cell carcinoma (ccRCC). We retrospectively enrolled 193 ccRCC patients undergoing nephrectomy at a single center. Clinicopathologic features, recurrence-free survival (RFS) and overall survival (OS) were recorded. IL-11 intensity was assessed by immunohistochemistry in tumor specimens. The Kaplan–Meier method was applied to compare survival curves. Cox regression models were used to analyze the impact of prognostic factors on RFS and OS. The concordance index (C-index) was calculated to assess predictive accuracy. High IL-11 expression is associated with increased risk of recurrence and poor survival for ccRCC patients (P < 0.001 and P < 0.001, respectively), especially those with early-stage disease (TNM stage I + II). Multivariate analyses confirmed that IL-11 expression was an independent prognostic factor for RFS and OS (P = 0.006 and P = 0.008, respectively). The predictive accuracy of well-established prognostic models was improved when IL-11 expression was integrated. In conclusion, high IL-11 expression is an independent predictor of poor prognosis in ccRCC patients. It may help identify patients who could benefit from additional treatments and closer follow up.
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Affiliation(s)
- Deng Pan
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Le Xu
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Haiou Liu
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - Weijuan Zhang
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Weisi Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yidong Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Qiang Fu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Jiejie Xu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
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194
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Yang P, Li Z, Li H, Lu Y, Wu H, Li Z. Pyruvate kinase M2 accelerates pro-inflammatory cytokine secretion and cell proliferation induced by lipopolysaccharide in colorectal cancer. Cell Signal 2015; 27:1525-32. [PMID: 25778902 DOI: 10.1016/j.cellsig.2015.02.032] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 02/28/2015] [Indexed: 01/22/2023]
Abstract
Surgery-induced inflammation has been associated with cancer recurrence and metastasis in colorectal cancer (CRC). As a constituent of gram-negative bacteria, lipopolysaccharide (LPS) is frequently abundant in the peri-operative window. However, the definite roles of LPS in tumour progression remain elusive. Here we reported that LPS treatment increased PKM expression through activation of NF-κB signalling pathway, and knockdown of PKM reversed LPS-induced TNF-α, IL-1β production and cell proliferation in CRC cells. We further showed that the PKM2 but not PKM1 mediated the pro-inflammatory and proliferative effects of LPS. Interestingly, LPS promoted PKM2 binding to the STAT3 promoter to enhance STAT3 expression and its subsequent nuclear translocation. Depletion of STAT3 decreased PKM2-induced TNF-α and IL-1β expression, indicating that STAT3 mediates the pro-inflammatory effects of PKM2. Furthermore, it is the protein kinase activity but not the pyruvate kinase activity of PKM2 that is required for inflammatory cytokine production. Collectively, our findings reveal the NF-κB-PKM2-STAT3 axis as a novel mechanism for the regulation of TNF-α and IL-1β production and suggest the importance of PKM2 as a key inflammatory mediator in inflammatory microenvironment.
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Affiliation(s)
- Peng Yang
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education, Shanxi University, Taiyuan 030006, China
| | - Zongwei Li
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education, Shanxi University, Taiyuan 030006, China
| | - Hanqing Li
- College of Life Science, Shanxi University, Taiyuan 030006, China
| | - Yangxu Lu
- College of Life Science, Shanxi University, Taiyuan 030006, China
| | - Haili Wu
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education, Shanxi University, Taiyuan 030006, China
| | - Zhuoyu Li
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education, Shanxi University, Taiyuan 030006, China; College of Life Science, Zhejiang Chinese Medical University, Hangzhou 310053, China.
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195
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Bharadwaj U, Eckols TK, Kolosov M, Kasembeli MM, Adam A, Torres D, Zhang X, Dobrolecki LE, Wei W, Lewis MT, Dave B, Chang JC, Landis MD, Creighton CJ, Mancini MA, Tweardy DJ. Drug-repositioning screening identified piperlongumine as a direct STAT3 inhibitor with potent activity against breast cancer. Oncogene 2015; 34:1341-53. [PMID: 24681959 PMCID: PMC4182178 DOI: 10.1038/onc.2014.72] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 02/15/2014] [Accepted: 02/17/2014] [Indexed: 12/12/2022]
Abstract
Signal transducer and activator of transcription (STAT) 3 regulates many cardinal features of cancer including cancer cell growth, apoptosis resistance, DNA damage response, metastasis, immune escape, tumor angiogenesis, the Warburg effect and oncogene addiction and has been validated as a drug target for cancer therapy. Several strategies have been used to identify agents that target Stat3 in breast cancer but none has yet entered into clinical use. We used a high-throughput fluorescence microscopy search strategy to identify compounds in a drug-repositioning library (Prestwick library) that block ligand-induced nuclear translocation of Stat3 and identified piperlongumine (PL), a natural product isolated from the fruit of the pepper Piper longum. PL inhibited Stat3 nuclear translocation, inhibited ligand-induced and constitutive Stat3 phosphorylation, and modulated expression of multiple Stat3-regulated genes. Surface plasmon resonance assay revealed that PL directly inhibited binding of Stat3 to its phosphotyrosyl peptide ligand. Phosphoprotein antibody array analysis revealed that PL does not modulate kinases known to activate Stat3 such as Janus kinases, Src kinase family members or receptor tyrosine kinases. PL inhibited anchorage-independent and anchorage-dependent growth of multiple breast cancer cell lines having increased pStat3 or total Stat3, and induced apoptosis. PL also inhibited mammosphere formation by tumor cells from patient-derived xenografts. PL's antitumorigenic function was causally linked to its Stat3-inhibitory effect. PL was non-toxic in mice up to a dose of 30 mg/kg/day for 14 days and caused regression of breast cancer cell line xenografts in nude mice. Thus, PL represents a promising new agent for rapid entry into the clinic for use in treating breast cancer, as well as other cancers in which Stat3 has a role.
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Affiliation(s)
- U Bharadwaj
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - T K Eckols
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - M Kolosov
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - M M Kasembeli
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - A Adam
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - D Torres
- Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - X Zhang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
| | - L E Dobrolecki
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
| | - W Wei
- 1] Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA [2] Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - M T Lewis
- 1] Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA [2] Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA [3] Program in Developmental Biology, Baylor College of Medicine, Houston, TX, USA [4] Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - B Dave
- The Methodist Cancer Center, The Methodist Hospital Research Institute, Houston, TX, USA
| | - J C Chang
- The Methodist Cancer Center, The Methodist Hospital Research Institute, Houston, TX, USA
| | - M D Landis
- The Methodist Cancer Center, The Methodist Hospital Research Institute, Houston, TX, USA
| | - C J Creighton
- Section of Hematology-Oncology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - M A Mancini
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - D J Tweardy
- 1] Section of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, TX, USA [2] Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA [3] Department of Radiology, Baylor College of Medicine, Houston, TX, USA
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196
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An SH2 domain model of STAT5 in complex with phospho-peptides define "STAT5 Binding Signatures". J Comput Aided Mol Des 2015; 29:451-70. [PMID: 25752764 DOI: 10.1007/s10822-015-9835-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 02/04/2015] [Indexed: 10/23/2022]
Abstract
The signal transducer and activator of transcription 5 (STAT5) is a member of the STAT family of proteins, implicated in cell growth and differentiation. STAT activation is regulated by phosphorylation of protein monomers at conserved tyrosine residues, followed by binding to phospho-peptide pockets and subsequent dimerization. STAT5 is implicated in the development of severe pathological conditions, including many cancer forms. However, nowadays a few STAT5 inhibitors are known, and only one crystal structure of the inactive STAT5 dimer is publicly available. With a view to enabling structure-based drug design, we have: (1) analyzed phospho-peptide binding pockets on SH2 domains of STAT5, STAT1 and STAT3; (2) generated a model of STAT5 bound to phospho-peptides; (3) assessed our model by docking against a class of known STAT5 inhibitors (Müller et al. in ChemBioChem 9:723-727, 2008); (4) used molecular dynamics simulations to optimize the molecular determinants responsible for binding and (5) proposed unique "Binding Signatures" of STAT5. Our results put in place the foundations to address STAT5 as a target for rational drug design, from sequence, structural and functional perspectives.
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197
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Santoni M, Massari F, Del Re M, Ciccarese C, Piva F, Principato G, Montironi R, Santini D, Danesi R, Tortora G, Cascinu S. Investigational therapies targeting signal transducer and activator of transcription 3 for the treatment of cancer. Expert Opin Investig Drugs 2015; 24:809-24. [PMID: 25746129 DOI: 10.1517/13543784.2015.1020370] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Signal transducer and activator of transcription 3 (STAT3) mediates the expression of a variety of genes in response to cell stimuli and thus plays a key role in several cellular processes such as cell growth and apoptosis. Deregulation of the STAT3 activity has been shown in many malignancies, including breast, head and neck, prostate, pancreas, ovarian and brain cancers and melanoma. Thus, STAT3 may represent an ideal target for cancer therapy. AREAS COVERED The authors review recent data on the role of STAT3 in tumor initiation and progression, as well as the ongoing clinical trials in cancer patients. The content includes information derived from trial databases, regulatory authorities and scientific literature. EXPERT OPINION Targeting STAT3 activation leads to the inhibition of tumor growth and metastasis both in vitro and in vivo without affecting normal cells; this suggests that STAT3 could be a valid molecular target for cancer therapy. Extensive clinical research is trying to find anti-STAT3 agents with high single-agent activity. The identification and development of novel drugs that can target deregulated STAT3 activation effectively is both a scientific and clinical challenge that needs to be addressed in the near future.
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Affiliation(s)
- Matteo Santoni
- Polytechnic University of the Marche Region, Medical Oncology, AOU Ospedali Riuniti , via Conca 71, 60126 Ancona , Italy +39 0715964263 ; +39 0715964269 ;
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198
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Brambilla L, Genini D, Laurini E, Merulla J, Perez L, Fermeglia M, Carbone GM, Pricl S, Catapano CV. Hitting the right spot: Mechanism of action of OPB-31121, a novel and potent inhibitor of the Signal Transducer and Activator of Transcription 3 (STAT3). Mol Oncol 2015; 9:1194-206. [PMID: 25777967 DOI: 10.1016/j.molonc.2015.02.012] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 02/24/2015] [Indexed: 01/05/2023] Open
Abstract
STAT3 is a key element in many oncogenic pathways and, like other transcription factors, is an attractive target for development of novel anticancer drugs. However, interfering with STAT3 functions has been a difficult task and very few small molecule inhibitors have made their way to the clinic. OPB-31121, an anticancer compound currently in clinical trials, has been reported to affect STAT3 signaling, although its mechanism of action has not been unequivocally demonstrated. In this study, we used a combined computational and experimental approach to investigate the molecular target and the mode of interaction of OPB-31121 with STAT3. In parallel, similar studies were performed with known STAT3 inhibitors (STAT3i) to validate our approach. Computational docking and molecular dynamics simulation (MDS) showed that OPB-31121 interacted with high affinity with the SH2 domain of STAT3. Interestingly, there was no overlap of the OPB-31121 binding site with those of the other STAT3i. Computational predictions were confirmed by in vitro binding assays and competition experiments along with site-directed mutagenesis of critical residues in the STAT3 SH2 domain. Isothermal titration calorimetry experiments demonstrated the remarkably high affinity of OPB-31121 for STAT3 with Kd (10 nM) 2-3 orders lower than other STAT3i. Notably, a similar ranking of the potency of the compounds was observed in terms of inhibition of STAT3 phosphorylation, cancer cell proliferation and clonogenicity. These results suggest that the high affinity and efficacy of OPB-31121 might be related to the unique features and mode of interaction of OPB-31121 with STAT3. These unique characteristics make OPB-31121 a promising candidate for further development and an interesting lead for designing new, more effective STAT3i.
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Affiliation(s)
- Lara Brambilla
- Institute of Oncology Research (IOR), Via Vela 6, 6500 Bellinzona, Switzerland
| | - Davide Genini
- Institute of Oncology Research (IOR), Via Vela 6, 6500 Bellinzona, Switzerland
| | - Erik Laurini
- Molecular Simulation Laboratory (MOSE), University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy
| | - Jessica Merulla
- Institute of Oncology Research (IOR), Via Vela 6, 6500 Bellinzona, Switzerland
| | - Laurent Perez
- Institute of Research in Biomedicine (IRB), Via Vela 6, 6500 Bellinzona, Switzerland
| | - Maurizio Fermeglia
- Molecular Simulation Laboratory (MOSE), University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy
| | - Giuseppina M Carbone
- Institute of Oncology Research (IOR), Via Vela 6, 6500 Bellinzona, Switzerland; Oncology Institute of Southern Switzerland (IOSI), Via Vela 6, 6500 Bellinzona, Switzerland
| | - Sabrina Pricl
- Molecular Simulation Laboratory (MOSE), University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy.
| | - Carlo V Catapano
- Institute of Oncology Research (IOR), Via Vela 6, 6500 Bellinzona, Switzerland; Oncology Institute of Southern Switzerland (IOSI), Via Vela 6, 6500 Bellinzona, Switzerland.
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199
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A gp130-Src-YAP module links inflammation to epithelial regeneration. Nature 2015; 519:57-62. [PMID: 25731159 DOI: 10.1038/nature14228] [Citation(s) in RCA: 481] [Impact Index Per Article: 53.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 01/09/2015] [Indexed: 02/06/2023]
Abstract
Inflammation promotes regeneration of injured tissues through poorly understood mechanisms, some of which involve interleukin (IL)-6 family members, the expression of which is elevated in many diseases including inflammatory bowel diseases and colorectal cancer. Here we show in mice and human cells that gp130, a co-receptor for IL-6 cytokines, triggers activation of YAP and Notch, transcriptional regulators that control tissue growth and regeneration, independently of the gp130 effector STAT3. Through YAP and Notch, intestinal gp130 signalling stimulates epithelial cell proliferation, causes aberrant differentiation and confers resistance to mucosal erosion. gp130 associates with the related tyrosine kinases Src and Yes, which are activated on receptor engagement to phosphorylate YAP and induce its stabilization and nuclear translocation. This signalling module is strongly activated upon mucosal injury to promote healing and maintain barrier function.
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200
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Zhao C, Yang SH, Khadka DB, Jin Y, Lee KT, Cho WJ. Computer-aided discovery of aminopyridines as novel JAK2 inhibitors. Bioorg Med Chem 2015; 23:985-95. [DOI: 10.1016/j.bmc.2015.01.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 01/08/2015] [Accepted: 01/09/2015] [Indexed: 01/22/2023]
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