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Sunkel B, Wu D, Chen Z, Wang CM, Liu X, Ye Z, Horning AM, Liu J, Mahalingam D, Lopez-Nicora H, Lin CL, Goodfellow PJ, Clinton SK, Jin VX, Chen CL, Huang THM, Wang Q. Integrative analysis identifies targetable CREB1/FoxA1 transcriptional co-regulation as a predictor of prostate cancer recurrence. Nucleic Acids Res 2016; 44:4105-22. [PMID: 26743006 PMCID: PMC4872073 DOI: 10.1093/nar/gkv1528] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/22/2015] [Indexed: 01/22/2023] Open
Abstract
Identifying prostate cancer-driving transcription factors (TFs) in addition to the androgen receptor promises to improve our ability to effectively diagnose and treat this disease. We employed an integrative genomics analysis of master TFs CREB1 and FoxA1 in androgen-dependent prostate cancer (ADPC) and castration-resistant prostate cancer (CRPC) cell lines, primary prostate cancer tissues and circulating tumor cells (CTCs) to investigate their role in defining prostate cancer gene expression profiles. Combining genome-wide binding site and gene expression profiles we define CREB1 as a critical driver of pro-survival, cell cycle and metabolic transcription programs. We show that CREB1 and FoxA1 co-localize and mutually influence each other's binding to define disease-driving transcription profiles associated with advanced prostate cancer. Gene expression analysis in human prostate cancer samples found that CREB1/FoxA1 target gene panels predict prostate cancer recurrence. Finally, we showed that this signaling pathway is sensitive to compounds that inhibit the transcription co-regulatory factor MED1. These findings not only reveal a novel, global transcriptional co-regulatory function of CREB1 and FoxA1, but also suggest CREB1/FoxA1 signaling is a targetable driver of prostate cancer progression and serves as a biomarker of poor clinical outcomes.
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Affiliation(s)
- Benjamin Sunkel
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH 43210, USA Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, OH 43210, USA The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Dayong Wu
- Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, OH 43210, USA The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Zhong Chen
- Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, OH 43210, USA The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Chiou-Miin Wang
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Xiangtao Liu
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Zhenqing Ye
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Aaron M Horning
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Joseph Liu
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Devalingam Mahalingam
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Horacio Lopez-Nicora
- Department of Plant Pathology, The Ohio State University, Columbus, OH 43210, USA
| | - Chun-Lin Lin
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Paul J Goodfellow
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Steven K Clinton
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Victor X Jin
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Chun-Liang Chen
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Tim H-M Huang
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Qianben Wang
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH 43210, USA Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, OH 43210, USA The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
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Interleukin-1B signalling leads to increased survival of gastric carcinoma cells through a CREB-C/EBPβ-associated mechanism. Gastric Cancer 2016; 19:74-84. [PMID: 25740226 DOI: 10.1007/s10120-014-0448-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 11/17/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Polymorphisms in inflammation-related genes have been associated with a risk of gastric carcinoma (GC). However, the biological mechanisms underlying these associations are still elusive. Our objective was to determine whether chronic inflammation-associated IL1Β signalling, as seen in the context of Helicobacter pylori infection, could be linked to gastric carcinogenesis by modulating the behaviour of gastric epithelial cells. METHODS The effect of IL1B was assessed by studying the expression and activation status of the IL1Β-activated transcription factors C/EBPβ and CREB in GC cell lines. Interaction between CREB and C/EBPβ was explored through interference RNA, chromatin immunoprecipitation and chemical inhibition. CREB and C/EBPβ expression was analysed in 66 samples of primary GC and in normal gastric mucosa. GC cell growth was analysed in vitro by BrdU incorporation and in vivo employing a chicken embryo chorioallantoic membrane model. RESULTS We found that IL1B regulates the expression/activation status of both C/EBPβ and CREB in GC cells through an ERK1/2-dependent mechanism. Our results show that CREB is a direct transactivator of CEBPB, acting as an upstream effector in this regulatory mechanism. Furthermore, we found CREB to be overexpressed in 94 % of GC samples and significantly associated with C/EBPβ expression (P < 0.05). Finally, we demonstrated both in vitro and in vivo that CREB can mediate IL1B-induced GC cell proliferation. CONCLUSIONS Our results support the hypothesis that the effect of chronic inflammation on gastric carcinogenesis, as seen in the context of genetically susceptible individuals infected with Helicobacter pylori, includes the modulation of signalling pathways that regulate survival mechanisms in epithelial cells. IL1B is able to increase the expression/activation status of CREB and its target gene C/EBPβ, which are mandatory for GC cell survival. Our results may help inform new strategies for the prevention and treatment of GC, including the control of chronic inflammation.
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53
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Kikuchi D, Tanimoto K, Nakayama K. CREB is activated by ER stress and modulates the unfolded protein response by regulating the expression of IRE1α and PERK. Biochem Biophys Res Commun 2015; 469:243-50. [PMID: 26642955 DOI: 10.1016/j.bbrc.2015.11.113] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 11/25/2015] [Indexed: 10/22/2022]
Abstract
Living cells are frequently exposed to various stresses. Hypoxic conditions induce endoplasmic reticulum (ER) stress, and activate the unfolded protein response (UPR) to maintain homeostasis. We previously reported that CREB has an important role in the proper response to prolonged hypoxia. To further understand the role of CREB in the hypoxic response, CREB stable knock-down (CREB-KD) cells were established from breast cancer MDA-MB231 cells and analyzed. CREB was activated by ER stress, and activation of CREB and the UPR pathway occurred in a coordinated manner in response to different stimuli, including ER stress-inducing chemicals, prolonged hypoxia, and oxygen-glucose deprivation (OGD). Depletion of CREB decreased the expression of IRE1α and PERK, two critical UPR signaling molecules. Promoter analysis and a chromatin immunoprecipitation assay indicated that CREB binds to the promoter region of these genes and regulates their expression. ER stress induced by hypoxia was reduced in CREB-KD cells, leading to reduced tumor metastasis to the lung. Finally, OGD strongly activated the UPR and induced cell death in control cells, whereas the UPR was moderately activated in CREB-KD cells, which were more resistant to cell death. This study demonstrates a new role for CREB as a regulator of ER stress, which is required to properly respond to stressful conditions, such as hypoxia.
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Affiliation(s)
- Daisuke Kikuchi
- Oxygen Biology Laboratory, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kousuke Tanimoto
- Genome Laboratory, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Koh Nakayama
- Oxygen Biology Laboratory, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan.
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Yamada T, Amann JM, Fukuda K, Takeuchi S, Fujita N, Uehara H, Iwakiri S, Itoi K, Shilo K, Yano S, Carbone DP. Akt Kinase-Interacting Protein 1 Signals through CREB to Drive Diffuse Malignant Mesothelioma. Cancer Res 2015; 75:4188-97. [PMID: 26294214 DOI: 10.1158/0008-5472.can-15-0858] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/26/2015] [Indexed: 12/12/2022]
Abstract
Diffuse malignant mesothelioma (DMM) is a tumor of serosal membranes with propensity for progressive local disease. Because current treatment options are largely ineffective, novel therapeutic strategies based on molecular mechanisms and the disease characteristics are needed to improve the outcomes of patients with this disease. Akt kinase interacting protein 1 (Aki1; Freud-1/CC2D1A) is a scaffold protein for the PI3K-PDK1-Akt signaling module that helps determine receptor signal selectivity for EGFR. Aki1 has been suggested as a therapeutic target, but its potential has yet to be evaluated in a tumor setting. Here, we report evidence supporting its definition as a therapeutic target in DMM. In cell-based assays, Aki1 silencing decreased cell viability and caused cell-cycle arrest of multiple DMM cell lines via effects on the PKA-CREB1 signaling pathway. Blocking CREB activity phenocopied Aki1 silencing. Clinically, Aki1 was expressed in most human DMM specimens where its expression correlated with phosphorylated CREB1. Notably, Aki1 siRNA potently blocked tumor growth in an orthotopic implantation model of DMM when administered directly into the pleural cavity of tumor-bearing mice. Our findings suggest an important role for the Aki1-CREB axis in DMM pathogenesis and provide a preclinical rationale to target Aki1 by intrathoracic therapy in locally advanced tumors.
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Affiliation(s)
- Tadaaki Yamada
- Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio. Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Joseph M Amann
- Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio
| | - Koji Fukuda
- Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Shinji Takeuchi
- Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Naoya Fujita
- Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Hisanori Uehara
- Department of Molecular and Environmental Pathology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Shotaro Iwakiri
- Department of Respiratory Surgery, Hyogo Prefectural Amagasaki Hospital, Amagasaki, Japan
| | - Kazumi Itoi
- Department of Respiratory Surgery, Hyogo Prefectural Amagasaki Hospital, Amagasaki, Japan
| | - Konstantin Shilo
- Department of Pathology, The Ohio State University Medical Center, Columbus, Ohio
| | - Seiji Yano
- Division of Medical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan.
| | - David P Carbone
- Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio.
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Steven A, Heiduk M, Recktenwald CV, Hiebl B, Wickenhauser C, Massa C, Seliger B. Colorectal Carcinogenesis: Connecting K-RAS-Induced Transformation and CREB Activity In Vitro and In Vivo. Mol Cancer Res 2015; 13:1248-62. [PMID: 25934695 DOI: 10.1158/1541-7786.mcr-14-0590] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 04/01/2015] [Indexed: 11/16/2022]
Abstract
UNLABELLED Oncogenic transformation is often associated with an increased expression of the cAMP response element binding (CREB) transcription factor controlling the expression of genes involved in cell proliferation, cell cycle, apoptosis, and tumor development, but a link between K-RAS(V12)-induced transformation and CREB has not yet been determined. Therefore, the constitutive and/or inhibitor-regulated mRNA and protein expression of CREB and signal transduction components and growth properties of parental fibroblasts, K-RAS(V12)-transformed counterparts, shCREB K-RAS(V12) transfectants and human colon carcinoma cells were determined. Increased CREB transcript and protein levels accompanied by an enhanced CREB activity was detected in K-RAS(V12)-transformed murine fibroblasts and K-RAS(V12)-mutated human tumor cells, which is dependent on the MAPK/MEK, PI3K, and/or PKC signal transduction. Immunohistochemical (IHC) staining of colorectal carcinoma lesions and murine tumors, with known KRAS gene mutation status, using antibodies specific for CREB and phospho-CREB, revealed a mechanistic link between CREB expression and K-RAS(V12)-mutated colorectal carcinoma lesions when compared with control tissues. Silencing of CREB by shRNA and/or treatment with a CREB inhibitor (KG-501) reverted the neoplastic phenotype of K-RAS(V12) transformants as demonstrated by a more fibroblast-like morphology, enhanced apoptosis sensitivity, increased doubling time, decreased migration, invasion and anchorage-independent growth, reduced tumorigenesis, and enhanced immunogenicity in vivo. The impaired shCREB-mediated invasion of K-RAS(V12) transformants was accompanied by a transcriptional downregulation of different matrix metalloproteinases (MMP) coupled with their reduced enzymatic activity. IMPLICATIONS CREB plays a key role in the K-RAS(V12)-mediated neoplastic phenotype and represents a suitable therapeutic target for murine and human K-RAS(V12)-induced tumors.
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Affiliation(s)
- André Steven
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Max Heiduk
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Christian V Recktenwald
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Bernhard Hiebl
- Center for Medical Research, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Claudia Wickenhauser
- Institute of Pathology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Chiara Massa
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Barbara Seliger
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
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Xie F, Li BX, Kassenbrock A, Xue C, Wang X, Qian DZ, Sears RC, Xiao X. Identification of a Potent Inhibitor of CREB-Mediated Gene Transcription with Efficacious in Vivo Anticancer Activity. J Med Chem 2015; 58:5075-87. [PMID: 26023867 PMCID: PMC4493896 DOI: 10.1021/acs.jmedchem.5b00468] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
Recent
studies have shown that nuclear transcription factor cyclic
adenosine monophosphate response element binding protein (CREB) is
overexpressed in many different types of cancers. Therefore, CREB
has been pursued as a novel cancer therapeutic target. Naphthol AS-E
and its closely related derivatives have been shown to inhibit CREB-mediated
gene transcription and cancer cell growth. Previously, we identified
naphthamide 3a as a different chemotype to inhibit CREB’s
transcription activity. In a continuing effort to discover more potent
CREB inhibitors, a series of structural congeners of 3a was designed and synthesized. Biological evaluations of these compounds
uncovered compound 3i (666-15) as a potent
and selective inhibitor of CREB-mediated gene transcription (IC50 = 0.081 ± 0.04 μM). 666-15 also
potently inhibited cancer cell growth without harming normal cells.
In an in vivo MDA-MB-468 xenograft model, 666-15 completely
suppressed the tumor growth without overt toxicity. These results
further support the potential of CREB as a valuable cancer drug target.
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57
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Wang X, Ren Y, Zhuang H, Meng X, Huang S, Li Y, Hehir M, Wang P. Decrease of phosphorylated proto-oncogene CREB at Ser 133 site inhibits growth and metastatic activity of renal cell cancer. Expert Opin Ther Targets 2015; 19:985-95. [PMID: 26036429 DOI: 10.1517/14728222.2015.1053208] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
OBJECTIVE Cyclic-AMP-responsive element-binding protein (CREB) is a proto-oncogenic transcription factor. The authors' previous reports showed that blocking the CREB binding site at Ser 133 inhibited the expression of target genes, which related to the progression of some tumors. In this study, the authors investigated the role of phosphorylated CREB (pCREB) at Ser133 in renal cell carcinoma (RCC) growth and metastases. METHODS Immunohistochemistry, xenograft model in nude mice, cell proliferation assay, cell invasion/migration assay, fluorescent immunocytochemistry and Western analysis were performed in an immortalized proximal tubule epithelial cell line and clear-cell RCC. RESULTS The authors' results showed that knockdown of pCREB inhibited kidney cancer cells growth in vivo. Furthermore, suppression of the pCREB level blunted the capabilities of cell migration and invasion in vitro and was accompanied with significantly decreased expression of MMP-2 and MMP-9, the filopodia formation and epithelial-mesenchymal transition-related proteins. Surprisingly, no changes of expression or location of vimentin were revealed in the experiment. Bioinformatic software explained the possible reason for this is that the promoter of vimentin does not contain the CRE sequence. CONCLUSIONS These data suggest that decreasing the level of pCREB inhibits the growth and metastasis of RCC by targeting the Ser 133 site.
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Affiliation(s)
- Xue Wang
- Ningbo University, School of Medicine , Ningbo 315211 , China
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Lee JW, Park HS, Park SA, Ryu SH, Meng W, Jürgensmeier JM, Kurie JM, Hong WK, Boyer JL, Herbst RS, Koo JS. A Novel Small-Molecule Inhibitor Targeting CREB-CBP Complex Possesses Anti-Cancer Effects along with Cell Cycle Regulation, Autophagy Suppression and Endoplasmic Reticulum Stress. PLoS One 2015; 10:e0122628. [PMID: 25897662 PMCID: PMC4405579 DOI: 10.1371/journal.pone.0122628] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 02/23/2015] [Indexed: 12/19/2022] Open
Abstract
Lung adenocarcinoma, the most common subtype of lung cancer, is the leading cause of cancer death worldwide. Despite attempts for the treatment of lung cancer which have been accumulating, promising new therapies are still needed. Here, we found that cyclic-AMP response element-binding protein (CREB)-CREB binding protein (CBP) transcription factors complex inhibitor, Naphthol AS-TR phosphate (NASTRp), is a potential therapeutic agent for lung cancer. We show that NASTRp inhibited oncogenic cell properties through cell cycle arrest with concomitant suppression of tumor-promoting autophagy with down-regulations of Atg5-12 and Atg7, and accumulation of p62 in human lung cancer cell lines. In addition, NASTRp induced expression of endoplasmic reticulum stress markers such as DDIT3/CHOP, and led to apoptosis along with Bim induction. These findings suggest that transcription factor/co-activator complex, CREB-CBP, can be a potential therapeutic target and its inhibition could be a novel therapeutic strategy for lung cancer.
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Affiliation(s)
- Jong Woo Lee
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
| | - Hee Sun Park
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
| | - Sin-Aye Park
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
| | - Seung-Hee Ryu
- Department of Radiation Oncology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - Wuyi Meng
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, United States of America
| | - Juliane M. Jürgensmeier
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
| | - Jonathan M. Kurie
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America
| | - Waun Ki Hong
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America
| | - Julie L. Boyer
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
| | - Roy S. Herbst
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
- Translational Research Program, Yale Comprehensive Cancer Center, New Haven, CT 06520, United States of America
| | - Ja Seok Koo
- Section of Medical Oncology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale School of Medicine, Yale University, New Haven, CT 06520, United States of America
- Translational Research Program, Yale Comprehensive Cancer Center, New Haven, CT 06520, United States of America
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Barresi V, Branca G, Caffo M, Tuccari G. p-CREB expression in human meningiomas: correlation with angiogenesis and recurrence risk. J Neurooncol 2015; 122:87-95. [PMID: 25563814 DOI: 10.1007/s11060-014-1706-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 12/22/2014] [Indexed: 02/07/2023]
Abstract
Despite total surgical resection, a percentage of meningiomas do unexpectedly recur. At present the prediction of recurrence risk and the management of recurrent tumours represent major issues in the patients affected by meningiomas. The present study aims at investigating the prognostic value of the expression of the phosphorylated transcription factor cyclic AMP responsive element binding protein (p-CREB) in a series of meningiomas of different histotype and grade. While no p-CREB expression was found in specimens of normal leptomeninges, 71 % of meningiomas in our cohort expressed p-CREB. In addition, nuclear expression of p-CREB was present in the endothelia of tumor vessels in all of the meningiomas, but not in the vessels of the non-neoplastic meninges. High expression of p-CREB was significantly more frequent in meningiomas showing atypical, chordoid or microcystic histotype (P = 0.0003), high histological grade (P < 0.0001), high Ki-67 labeling index (P = 0.0001), high microvessel density counts (P < 0.0001) and high vascular endothelial growth factor expression (P = 0.0113). In addition, high p-CREB expression was significantly associated with the development of recurrences (P = 0.0031) and it was a significant negative, albeit not independent, prognostic factor for disease free survival in patients with meningiomas submitted to complete surgical removal (P = 0.0019). In conclusion, we showed that p-CREB is expressed in human meningiomas and that it represents a significant predictor of recurrence risk in these tumors. Due to its high expression in more aggressive tumors and in the tumor vessels, it may represent a novel therapeutic target in meningiomas.
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Affiliation(s)
- Valeria Barresi
- Department of Human Pathology "Gaetano Barresi", AOU Polyclinic G. Martino, Pad D, Via Consolare Valeria, 98125, Messina, Italy,
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Barresi V, Mondello S, Branca G, Rajan TS, Vitarelli E, Tuccari G. p-CREB expression in human gliomas: potential use in the differential diagnosis between astrocytoma and oligodendroglioma. Hum Pathol 2014; 46:231-8. [PMID: 25476123 DOI: 10.1016/j.humpath.2014.10.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/16/2014] [Accepted: 10/19/2014] [Indexed: 01/06/2023]
Abstract
Phosphorylated cyclic-AMP responsive element binding protein (p-CREB) is a transcription factor that is involved in gliomagenesis. For this reason, it was recently proposed as a potential therapeutic target in gliomas; however, gliomas comprise tumors with different biomolecular profile, clinical behavior, and response to chemotherapy. In the present study, we aimed to investigate whether p-CREB expression varies in the 2 main types of gliomas, astrocytomas and oligodendrogliomas. Thus, we analyzed the expression of p-CREB in a series of astrocytomas and oligodendrogliomas of different histologic grades by immunohistochemistry and Western blot analysis. p53 overexpression and the Ki-67 labeling index were also assessed in all the tumors. p-CREB immunohistochemical expression was present in 100% of the astrocytic tumors, but in only 46% of oligodendrogliomas (P = .0033 for grade II; P = .0041 for grade III tumors). Absence of p-CREB immunohistochemical expression was significantly associated with 1p/19q codeletion (P < .0001) and identified 1p/19q codeleted tumors, with 70% sensitivity and 100% specificity (area under the curve = 0.85; P < .0001). In addition, p-CREB expression correlated with higher Ki-67 labeling index (P = .049) and p53 overexpression (P < .0001) as well as with the histologic grade of astrocytomas (P = .044). Immunohistochemical results were further confirmed by Western blot analysis. Our findings demonstrate that astrocytomas and oligodendrogliomas are characterized by distinctive patterns of p-CREB expression. These distinct expression patterns might provide insight into the mechanism of tumorigenesis of glial tumors and represent a useful tool for the differential diagnosis of astrocytoma and oligodendroglioma.
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Affiliation(s)
- Valeria Barresi
- Department of Human Pathology "Gaetano Barresi," AOU G. Martino, Pad D, Via Consolare Valeria, 98125 Messina, Italy.
| | - Stefania Mondello
- Department of Neurosciences, AOU G. Martino, Pad D, Via Consolare Valeria, 98125 Messina, Italy.
| | - Giovanni Branca
- Department of Human Pathology "Gaetano Barresi," AOU G. Martino, Pad D, Via Consolare Valeria, 98125 Messina, Italy.
| | | | - Enrica Vitarelli
- Department of Human Pathology "Gaetano Barresi," AOU G. Martino, Pad D, Via Consolare Valeria, 98125 Messina, Italy.
| | - Giovanni Tuccari
- Department of Human Pathology "Gaetano Barresi," AOU G. Martino, Pad D, Via Consolare Valeria, 98125 Messina, Italy.
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Li BX, Xie F, Fan Q, Barnhart KM, Moore CE, Rheingold AL, Xiao X. Novel Type of Prodrug Activation through a Long-Range O,N-Acyl Transfer: A Case of Water-Soluble CREB Inhibitor. ACS Med Chem Lett 2014; 5:1104-9. [PMID: 25313320 DOI: 10.1021/ml500330n] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/22/2014] [Indexed: 11/29/2022] Open
Abstract
CREB (cAMP response element binding protein) has been shown to play an important role in tumor initiation, progression, and metastasis. We discovered that naphthol AS-E, a cell-permeable CREB inhibitor, presented antiproliferative activity in a broad panel of cancer cell lines in vitro. However, it has limited aqueous solubility. In this report, we described a water-soluble inhibitor (compound 6) of CREB-mediated gene transcription with in vivo anticancer activity. Unexpectedly, compound 6 was found to be a prodrug of compound 12 necessitating an unprecedented long-range O,N-acyl transfer. The rate of this transfer was pH- and temperature-dependent. To the best of our knowledge, this is the first time to show that a long-range O,N-acyl transfer could be exploited as a prodrug activation strategy to improve aqueous solubility. This type of prodrug may be applicable to other structures with spatially arranged hydroxyl amide to improve their aqueous solubility.
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Affiliation(s)
| | | | | | | | - Curtis E. Moore
- Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Arnold L. Rheingold
- Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
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Westbom CM, Shukla A, MacPherson MB, Yasewicz EC, Miller JM, Beuschel SL, Steele C, Pass HI, Vacek PM, Shukla A. CREB-induced inflammation is important for malignant mesothelioma growth. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 184:2816-27. [PMID: 25111229 DOI: 10.1016/j.ajpath.2014.06.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 05/15/2014] [Accepted: 06/05/2014] [Indexed: 12/25/2022]
Abstract
Malignant mesothelioma (MM) is an aggressive tumor with no treatment regimen. Previously we have demonstrated that cyclic AMP response element binding protein (CREB) is constitutively activated in MM tumor cells and tissues and plays an important role in MM pathogenesis. To understand the role of CREB in MM tumor growth, we generated CREB-inhibited MM cell lines and performed in vitro and in vivo experiments. In vitro experiments demonstrated that CREB inhibition results in significant attenuation of proliferation and drug resistance of MM cells. CREB-silenced MM cells were then injected into severe combined immunodeficiency mice, and tumor growth in s.c. and i.p. models of MM was followed. We observed significant inhibition in MM tumor growth in both s.c. and i.p. models and the presence of a chemotherapeutic drug, doxorubicin, further inhibited MM tumor growth in the i.p. model. Peritoneal lavage fluids from CREB-inhibited tumor-bearing mice showed a significantly reduced total cell number, differential cell counts, and pro-inflammatory cytokines and chemokines (IL-6, IL-8, regulated on activation normal T cell expressed and secreted, monocyte chemotactic protein-1, and vascular endothelial growth factor). In vitro studies showed that asbestos-induced inflammasome/inflammation activation in mesothelial cells was CREB dependent, further supporting the role of CREB in inflammation-induced MM pathogenesis. In conclusion, our data demonstrate the involvement of CREB in the regulation of MM pathogenesis by regulation of inflammation.
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Affiliation(s)
- Catherine M Westbom
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont
| | - Anurag Shukla
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont
| | | | - Elizabeth C Yasewicz
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont
| | - Jill M Miller
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont
| | - Stacie L Beuschel
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont
| | - Chad Steele
- Department of Medicine, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Harvey I Pass
- Langone Medical Center, NYU School of Medicine, New York, New York
| | - Pamela M Vacek
- Department of Medical Biostatistics, College of Medicine, University of Vermont, Burlington, Vermont
| | - Arti Shukla
- Department of Pathology, College of Medicine, University of Vermont, Burlington, Vermont.
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63
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Liu W, Wu Y, Wang L, Gao L, Wang Y, Liu X, Zhang K, Song J, Wang H, Bayer TA, Glaser L, Sun Y, Zhang W, Cutaia M, Zhang DY, Ye F. Protein signature for non-small cell lung cancer prognosis. Am J Cancer Res 2014; 4:256-269. [PMID: 24959380 PMCID: PMC4065406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND Current histopathological classification and TNM staging have limited accuracy in predicting survival and stratifying patients for appropriate treatment. The goal of the study is to determine whether the expression pattern of functionally important regulatory proteins can add additional values for more accurate classification and prognostication of non-small lung cancer (NSCLC). METHODS The expression of 108 proteins and phosphoproteins in 30 paired NSCLC samples were assessed using Protein Pathway Array (PPA). The differentially expressed proteins were further confirmed using a tissue microarray (TMA) containing 94 NSCLC samples and were correlated with clinical data and survival. RESULTS Twelve of 108 proteins (p-CREB(Ser133), p-ERK1/2(Thr202/Tyr204), Cyclin B1, p-PDK1(Ser241), CDK4, CDK2, HSP90, CDC2p34, β-catenin, EGFR, XIAP and PCNA) were selected to build the predictor to classify normal and tumor samples with 97% accuracy. Five proteins (CDC2p34, HSP90, XIAP, CDK4 and CREB) were confirmed to be differentially expressed between NSCLC (n=94) and benign lung tumor (n=19). Over-expression of CDK4 and HSP90 in tumors correlated with a favorable overall survival in all NSCLC patients and the over-expression of p-CREB(Ser133) and CREB in NSCLC correlated with a favorable survival in smokers and those with squamous cell carcinoma, respectively. Finally, the four proteins (CDK4, HSP90, p-CREB and CREB) were used to calculate the risk score of each individual patient with NSCLC to predict survival. CONCLUSION In summary, our data demonstrated a broad disturbance of functionally important regulatory proteins in NSCLC and some of these can be selected as clinically useful biomarkers for diagnosis, classification and prognosis.
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Affiliation(s)
- Wei Liu
- Department of Thoracic Surgery, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Yong Wu
- Department of Thoracic Surgery, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Libo Wang
- Endoscopic Center, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Ling Gao
- Cancer Center, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Yingping Wang
- Department of Pathology, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Xiaoliang Liu
- Cancer Center, The First Hospital of Jilin UniversityChangchun, Jilin 130021, China
| | - Kai Zhang
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Jena Song
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Hongxia Wang
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Thomas A Bayer
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Laurel Glaser
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Yezhou Sun
- Department of Medicine, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Weijia Zhang
- Department of Medicine, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Michael Cutaia
- Department of Medicine, SUNY/Downstate Health Sciences Center, New York Harbor Health Care SystemBrooklyn, NY 11203, USA
| | - David Y Zhang
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
| | - Fei Ye
- Department of Pathology, Mount Sinai School of MedicineNew York, NY 10029, USA
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Wang Y, Hu Z, Liu Z, Chen R, Peng H, Guo J, Chen X, Zhang H. MTOR inhibition attenuates DNA damage and apoptosis through autophagy-mediated suppression of CREB1. Autophagy 2013; 9:2069-86. [PMID: 24189100 DOI: 10.4161/auto.26447] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Hyperactivation of mechanistic target of rapamycin (MTOR) is a common feature of human cancers, and MTOR inhibitors, such as rapamycin, are thus becoming therapeutics in targeting certain cancers. However, rapamycin has also been found to compromise the efficacy of chemotherapeutics to cells with hyperactive MTOR. Here, we show that loss of TSC2 or PTEN enhanced etoposide-induced DNA damage and apoptosis, which was blunted by suppression of MTOR with either rapamycin or RNA interference. cAMP response element-binding protein 1 (CREB1), a nuclear transcription factor that regulates genes involved in survival and death, was positively regulated by MTOR in mouse embryonic fibroblasts (MEFs) and cancer cell lines. Silencing Creb1 expression with siRNA protected MTOR-hyperactive cells from DNA damage-induced apoptosis. Furthermore, loss of TSC2 or PTEN impaired either etoposide or nutrient starvation-induced autophagy, which in turn, leads to CREB1 hyperactivation. We further elucidated an inverse correlation between autophagy activity and CREB1 activity in the kidney tumor tissue obtained from a TSC patient and the mouse livers with hepatocyte-specific knockout of PTEN. CREB1 induced DNA damage and subsequent apoptosis in response to etoposide in autophagy-defective cells. Reactivation of CREB1 or inhibition of autophagy not only improved the efficacy of rapamycin but also alleviated MTOR inhibition-mediated chemoresistance. Therefore, autophagy suppression of CREB1 may underlie the MTOR inhibition-mediated chemoresistance. We suggest that inhibition of MTOR in combination with CREB1 activation may be used in the treatment of cancer caused by an abnormal PI3K-PTEN-AKT-TSC1/2-MTOR signaling pathway. CREB1 activators should potentiate the efficacy of chemotherapeutics in treatment of these cancers.
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Affiliation(s)
- Ying Wang
- State Key Laboratory of Medical Molecular Biology; Department of Physiology; Institute of Basic Medical Sciences and School of Basic Medicine; Graduate School of Peking Union Medical College; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing, China
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65
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Steven A, Leisz S, Massa C, Iezzi M, Lattanzio R, Lamolinara A, Bukur J, Müller A, Hiebl B, Holzhausen HJ, Seliger B. HER-2/neu mediates oncogenic transformation via altered CREB expression and function. Mol Cancer Res 2013; 11:1462-77. [PMID: 24025972 DOI: 10.1158/1541-7786.mcr-13-0125] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
UNLABELLED The cyclic (c)AMP responsive element binding protein (CREB) plays a key role in many cellular processes, including differentiation, proliferation, and signal transduction. Furthermore, CREB overexpression was found in tumors of distinct origin and evidence suggests an association with tumorigenicity. To establish a mechanistic link between HER-2/neu-mediated transformation and CREB protein expression and function, in vitro models of HER-2/neu-overexpressing and HER-2/neu-negative/silenced counterparts as well as human mammary carcinoma lesions with defined HER-2/neu status were used. HER-2/neu overexpression resulted in the induction and activation of CREB protein in vitro and in vivo, whereas short hairpin RNA (shRNA)-mediated inhibition of HER-2/neu correlated with downregulated CREB activity. CREB activation in HER-2/neu-transformed cells enhanced distinct signal transduction pathways, whereas their inhibition negatively interfered with CREB expression and/or activation. CREB downregulation in HER-2/neu-transformed cells by shRNA and by the inhibitors KG-501 and lapatinib caused morphologic changes, reduced cell proliferation with G0-G1 cell-cycle arrest, which was rescued by CREB expression. This was accompanied by reduced cell migration, wound healing, an increased fibronectin adherence, invasion, and matrix metalloproteinase expression. In vivo shCREB-HER-2/neu(+) cells, but not control cells, exerted a significantly decreased tumorgenicity that was associated with decreased proliferative capacity, enhanced apoptosis, and increased frequency of T lymphocytes in peripheral blood mononuclear cells. Thus, CREB plays an important role in the HER-2/neu-mediated transformation by altering in vitro and in vivo growth characteristics. IMPLICATIONS These data suggest that CREB affects tumor immunogenicity and is a potential target for cancer therapy.
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Affiliation(s)
- André Steven
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Str. 2, 06112 Halle, Germany.
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66
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Wong JC, Bathina M, Fiscus RR. Cyclic GMP/protein kinase G type-Iα (PKG-Iα) signaling pathway promotes CREB phosphorylation and maintains higher c-IAP1, livin, survivin, and Mcl-1 expression and the inhibition of PKG-Iα kinase activity synergizes with cisplatin in non-small cell lung cancer cells. J Cell Biochem 2013; 113:3587-98. [PMID: 22740515 DOI: 10.1002/jcb.24237] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Previously, our laboratory showed that nitric oxide (NO)/cyclic GMP (cGMP)/protein kinase G type-Iα (PKG-Iα) signaling pathway plays an important role in preventing spontaneous apoptosis and promoting cell proliferation in both normal cells (bone marrow stromal cells and vascular smooth muscle cells) and certain cancer cells (ovarian cancer cells). In the present study, we investigated the novel role of the cGMP/PKG-Iα pathway in preventing spontaneous apoptosis, promoting colony formation and regulating phosphorylation of cAMP response element binding (CREB) protein and protein expression of inhibitor of apoptosis proteins (IAPs) and anti-apoptotic Bcl-2-related proteins in NCI-H460 and A549 non-small cell lung cancer (NSCLC) cells. 1H-(1,2,4)oxadiazolo(4,3-a)quinoxalin-1-one (ODQ), which blocks endogenous NO-induced activation of cGMP/PKG-Iα, induced apoptosis and decreased colony formation. ODQ also decreased CREB ser133 phosphorylation and protein expression of c-IAP1, livin, and survivin. DT-2 (inhibitor of PKG-Iα kinase activity) increased apoptosis by twofold and decreased CREB ser133 phosphorylation and c-IAP1, livin, and survivin expression. Gene knockdown of PKG-Iα expression using small-interfering RNA increased apoptosis and decreased CREB ser133 phosphorylation, and c-IAP1, livin, survivin, and Mcl-1 expression. Inhibition of PKG-Iα kinase activity with DT-2 dramatically enhanced pro-apoptotic effects of the chemotherapeutic agent cisplatin. Combined treatment of DT-2 and cisplatin increased apoptosis compared with cisplatin or DT-2 alone, showing a synergistic effect. The data suggest that the PKG-Iα kinase activity is necessary for maintaining higher levels of CREB phosphorylation at ser133 and protein expression of c-IAP1, livin, survivin, and Mcl-1, preventing spontaneous apoptosis and promoting colony formation in NSCLC cells, which may limit the effectiveness of chemotherapeutic agents like cisplatin.
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Affiliation(s)
- Janica C Wong
- Center for Diabetes and Obesity Prevention, Treatment, Research and Education, and College of Pharmacy, Roseman University of Health Sciences, Henderson, Nevada 89014, USA
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Tan X, Wang S, Yang B, Zhu L, Yin B, Chao T, Zhao J, Yuan J, Qiang B, Peng X. The CREB-miR-9 negative feedback minicircuitry coordinates the migration and proliferation of glioma cells. PLoS One 2012. [PMID: 23185366 PMCID: PMC3502497 DOI: 10.1371/journal.pone.0049570] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Migration-proliferation dichotomy is a common mechanism in gliomagenesis; however, an understanding of the exact molecular mechanism of this "go or grow" phenomenon remains largely incomplete. In the present study, we first found that microRNA-9 (miR-9) is highly expressed in glioma cells. MiR-9 inhibited the proliferation and promoted the migration of glioma cells by directly targeting cyclic AMP response element-binding protein (CREB) and neurofibromin 1 (NF1), respectively. Our data also suggested a migration-inhibitory role for CREB through directly regulating the transcription of NF1. Furthermore, we found that the transcription of miR-9-1 is under CREB's control, forming a negative feedback minicircuitry. Taken together, miR-9 inhibits proliferation but promotes migration, whereas CREB plays a pro-proliferative and anti-migratory role, suggesting that the CREB-miR-9 negative feedback minicircuitry plays a critical role in the determination of "go or grow" in glioma cells.
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Affiliation(s)
- Xiaochao Tan
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Wen J, Fu JH, Zhang W, Guo M. Lung carcinoma signaling pathways activated by smoking. CHINESE JOURNAL OF CANCER 2012; 30:551-8. [PMID: 21801603 PMCID: PMC4013405 DOI: 10.5732/cjc.011.10059] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Lung cancer is the leading cause of cancer death in men and women worldwide, with over a million deaths annually. Tobacco smoke is the major etiologic risk factor for lung cancer in current or previous smokers and has been strongly related to certain types of lung cancer, such as small cell lung carcinoma and squamous cell lung carcinoma. In recent years, there has been an increased incidence of lung adenocarcinoma. This change is strongly associated with changes in smoking behavior and cigarette design. Carcinogens present in tobacco products and their intermediate metabolites can activate multiple signaling pathways that contribute to lung cancer carcinogenesis. In this review, we summarize the smoking-activated signaling pathways involved in lung cancer.
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Affiliation(s)
- Jing Wen
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030-4009, USA
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69
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Li BX, Yamanaka K, Xiao X. Structure-activity relationship studies of naphthol AS-E and its derivatives as anticancer agents by inhibiting CREB-mediated gene transcription. Bioorg Med Chem 2012; 20:6811-20. [PMID: 23102993 DOI: 10.1016/j.bmc.2012.09.056] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 09/18/2012] [Accepted: 09/27/2012] [Indexed: 11/26/2022]
Abstract
CREB (cyclic AMP-response element binding protein) is a downstream transcription factor of a multitude of signaling pathways emanating from receptor tyrosine kinases or G-protein coupled receptors. CREB is not activated until it is phosphorylated at Ser133 and its subsequent binding to CREB-binding protein (CBP) through kinase-inducible domain (KID) in CREB and KID-interacting (KIX) domain in CBP. Tumor tissues from various organs present higher level of expression and activation of CREB. Thus CREB has been proposed as a promising cancer drug target. We previously described naphthol AS-E (1a) as a small molecule inhibitor of CREB-mediated gene transcription in living cells. Here we report the structure-activity relationship (SAR) studies of 1a by modifying the appendant phenyl ring. All the compounds were evaluated for in vitro inhibition of KIX-KID interaction, cellular inhibition of CREB-mediated gene transcription and inhibition of proliferation of four cancer cell lines (A549, MCF-7, MDA-MB-231 and MDA-MB-468). SAR indicated that a small and electron-withdrawing group was preferred at the para-position for KIX-KID interaction inhibition. Compound 1a was selected for further biological characterization and it was found that 1a down-regulated the expression of endogenous CREB target genes. Expression of a constitutively active CREB mutant, VP16-CREB in MCF-7 cells rendered the cells resistant to 1a, suggesting that CREB was critical in mediating its anticancer activity. Furthermore, 1a was not toxic to normal human cells. Collectively, these data support that 1a represents a structural template for further development into potential cancer therapeutics with a novel mechanism of action.
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Affiliation(s)
- Bingbing X Li
- Program in Chemical Biology, Oregon Health & Science University, Portland, OR, USA
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70
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Huang RL, Chang CC, Su PH, Chen YC, Liao YP, Wang HC, Yo YT, Chao TK, Huang HC, Lin CY, Chu TY, Lai HC. Methylomic analysis identifies frequent DNA methylation of zinc finger protein 582 (ZNF582) in cervical neoplasms. PLoS One 2012; 7:e41060. [PMID: 22815913 PMCID: PMC3397950 DOI: 10.1371/journal.pone.0041060] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/16/2012] [Indexed: 12/26/2022] Open
Abstract
Background Despite of the trend that the application of DNA methylation as a biomarker for cancer detection is promising, clinically applicable genes are few. Therefore, we looked for novel hypermethylated genes for cervical cancer screening. Methods and Findings At the discovery phase, we analyzed the methylation profiles of human cervical carcinomas and normal cervixes by methylated DNA immunoprecipitation coupled to promoter tiling arrays (MeDIP-on-chip). Methylation-specific PCR (MSP), quantitative MSP and bisulfite sequencing were used to verify the methylation status in cancer tissues and cervical scrapings from patients with different severities. Immunohistochemical staining of a cervical tissue microarray was used to confirm protein expression. We narrowed to three candidate genes: DBC1, PDE8B, and ZNF582; their methylation frequencies in tumors were 93%, 29%, and 100%, respectively. At the pre-validation phase, the methylation frequency of DBC1 and ZNF582 in cervical scraping correlated significantly with disease severity in an independent cohort (n = 330, both P<0.001). For the detection of cervical intraepithelial neoplasia 3 (CIN3) and worse, the area under the receiver operating characteristic curve (AUC) of ZNF582 was 0.82 (95% confidence interval = 0.76–0.87). Conclusions Our study shows ZNF582 is frequently methylated in CIN3 and worse lesions, and it is demonstrated as a potential biomarker for the molecular screening of cervical cancer.
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Affiliation(s)
- Rui-Lan Huang
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan
- Laboratory of Epigenetics and Cancer Stem Cells, National Defense Medical Centre, Taipei, Taiwan
| | - Cheng-Chang Chang
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Laboratory of Epigenetics and Cancer Stem Cells, National Defense Medical Centre, Taipei, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Po-Hsuan Su
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Chih Chen
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Ping Liao
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Hui-Chen Wang
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Laboratory of Epigenetics and Cancer Stem Cells, National Defense Medical Centre, Taipei, Taiwan
| | - Yi-Te Yo
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Laboratory of Epigenetics and Cancer Stem Cells, National Defense Medical Centre, Taipei, Taiwan
| | - Tai-Kuang Chao
- Department of Pathology, Tri-Service General Hospital, Taipei, Taiwan
| | - Hsuan-Cheng Huang
- Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan
| | - Ching-Yu Lin
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Tang-Yuan Chu
- Center for Cervical Cancer Prevention, Department of Obstetrics and Gynecology, Graduate Institute of Clinical Medicine, Tzu Chi Medical Center, Tzu Chi University, Hualien, Taiwan
| | - Hung-Cheng Lai
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, Taipei, Taiwan
- Laboratory of Epigenetics and Cancer Stem Cells, National Defense Medical Centre, Taipei, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- * E-mail:
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Jiang M, Li BX, Xie F, Delaney F, Xiao X. Design, synthesis, and biological evaluation of conformationally constrained analogues of naphthol AS-E as inhibitors of CREB-mediated gene transcription. J Med Chem 2012; 55:4020-4. [PMID: 22458559 DOI: 10.1021/jm300043c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclic AMP response element binding protein (CREB) is often dysregulated in cancer cells and is an attractive cancer drug target. Previously, we described naphthol AS-E (1) as a small molecule inhibitor of CREB-mediated gene transcription. To understand its bioactive conformation, a series of conformationally constrained analogues of 1 were designed and synthesized. Biological evaluation of these analogues suggests that the global energy minimum of 1 is the likely bioactive conformation.
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Affiliation(s)
- Min Jiang
- Program in Chemical Biology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon, USA
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72
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Mantamadiotis T, Papalexis N, Dworkin S. CREB signalling in neural stem/progenitor cells: recent developments and the implications for brain tumour biology. Bioessays 2012; 34:293-300. [PMID: 22331586 DOI: 10.1002/bies.201100133] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This paper discusses the evidence for the role of CREB in neural stem/progenitor cell (NSPC) function and oncogenesis and how these functions may be important for the development and growth of brain tumours. The cyclic-AMP response element binding (CREB) protein has many roles in neurons, ranging from neuronal survival to higher order brain functions such as memory and drug addiction behaviours. Recent studies have revealed that CREB also has a role in NSPC survival, differentiation and proliferation. Recent work has shown that over-expression of CREB in transgenic animals can impart oncogenic properties on cells in various tissues and that aberrant CREB expression is associated with tumours in patients. It is the central position of CREB, downstream of key developmental and growth signalling pathways, which give CREB the ability to influence a spectrum of cell activities, such as cell survival, growth and differentiation in both normal and cancer cells.
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Affiliation(s)
- Theo Mantamadiotis
- Department of Pathology, The University of Melbourne, Parkville, Australia.
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73
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Yang C, Li X, Wang Y, Zhao L, Chen W. Long non-coding RNA UCA1 regulated cell cycle distribution via CREB through PI3-K dependent pathway in bladder carcinoma cells. Gene 2012; 496:8-16. [PMID: 22285928 DOI: 10.1016/j.gene.2012.01.012] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/02/2012] [Accepted: 01/11/2012] [Indexed: 12/17/2022]
Abstract
Long non-coding RNA urothelial carcinoma associated 1 (UCA1) promotes human bladder cancer cell proliferation, but the underlying mechanism remains unknown. After knocking down of UCA1 in BLZ-211 cells, several cell cycle-related genes (CDKN2B, EP300 and TGFβ-2) were screened by microarray assay and validated by real-time PCR. Interestingly, in western blot analysis, p300 (encoded by EP300) and its coactivator cAMP response element-binding protein (CREB) level were significantly down-regulated. Both suppression of UCA1 expression by shRNA in BLZ-211 cells and ectopic expression of UCA1 in UMUC-2 cells showed that UCA1 alteration paralleled to the expression and phosphorylation of CREB, and UCA1 obviously influenced AKT expression and activity. Furthermore, in BLZ-211 cells, cell cycle progression was greatly reduced after PI3-K pathway was blocked by LY294002, indicating that UCA1 affected cell cycle progression through CREB. Taken together, we concluded that UCA1 regulated cell cycle through CREB via PI3K-AKT dependent pathway in bladder cancer.
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Affiliation(s)
- Chen Yang
- Center for Molecular Medicine, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, 76 West Yanta Road, 710061 Xi'an, China
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74
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Novel human BTB/POZ domain-containing zinc finger protein ZBTB1 inhibits transcriptional activities of CRE. Mol Cell Biochem 2011; 357:405-14. [PMID: 21706167 DOI: 10.1007/s11010-011-0911-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Accepted: 05/28/2011] [Indexed: 02/07/2023]
Abstract
BTB/POZ protein family plays a key role in many biological processes by regulating the transcriptional activities of some downstream genes. Here, we characterized the member of C(2)H(2) type zinc finger gene, Zinc finger and BTB domain containing 1 (ZBTB1). The complete sequence of ZBTB1 cDNA contains a 2142 bp open reading frame (ORF) and encodes a 713 amino acid protein with an N-terminal BTB/POZ domain that is similar to the same domain of other known transcription regulators and eight classical zinc finger C(2)H(2) motifs in the C-terminus. Subcellular localization analysis demonstrated that ZBTB1 was localized to the nucleus, forming dot-like structures. Transcriptional activity assays showed that ZBTB1 was a transcription repressor and overexpression of ZBTB1 in the COS7 cells reduced the transcriptional activities of cAMP response element (CRE). Further studies showed that the BTB domain and ZNF motifs of ZBTB1 may both be involved in this suppression. These results suggest that ZBTB1 protein may act as a transcription repressor in the activation of CREB and cAMP-mediated signal transduction pathways to mediate cellular functions.
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Xiao X, Li BX, Mitton B, Ikeda A, Sakamoto KM. Targeting CREB for cancer therapy: friend or foe. Curr Cancer Drug Targets 2010; 10:384-91. [PMID: 20370681 DOI: 10.2174/156800910791208535] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Accepted: 03/31/2010] [Indexed: 11/22/2022]
Abstract
The cyclic-AMP response element-binding protein (CREB) is a nuclear transcription factor activated by phosphorylation at Ser133 by multiple serine/threonine (Ser/Thr) kinases. Upon phosphorylation, CREB binds the transcriptional co-activator, CBP (CREB-binding protein), to initiate CREB-dependent gene transcription. CREB is a critical regulator of cell differentiation, proliferation and survival in the nervous system. Recent studies have shown that CREB is involved tumor initiation, progression and metastasis, supporting its role as a proto-oncogene. Overexpression and over-activation of CREB were observed in cancer tissues from patients with prostate cancer, breast cancer, non-small-cell lung cancer and acute leukemia while down-regulation of CREB in several distinct cancer cell lines resulted in inhibition of cell proliferation and induction of apoptosis, suggesting that CREB may be a promising target for cancer therapy. Although CREB, as a transcription factor, is a challenging target for small molecules, various small molecules have been discovered to inhibit CREB phosphorylation, CREB-DNA, or CREB-CBP interaction. These results suggest that CREB is a suitable transcription factor for drug targeting and therefore targeting CREB could represent a novel strategy for cancer therapy.
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Affiliation(s)
- Xiangshu Xiao
- Program in Chemical Biology, Oregon Health & Science University, Portland, Oregon, USA.
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76
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cAMP-response-element-binding protein positively regulates breast cancer metastasis and subsequent bone destruction. Biochem Biophys Res Commun 2010; 398:309-14. [PMID: 20599715 DOI: 10.1016/j.bbrc.2010.06.087] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 06/21/2010] [Indexed: 11/23/2022]
Abstract
cAMP-response-element-binding protein (CREB) signaling has been reported to be associated with cancer development and poor clinical outcome in various types of cancer. However, it remains to be elucidated whether CREB is involved in breast cancer development and osteotropism. Here, we found that metastatic MDA-MB-231 breast cancer cells exhibited higher CREB expression than did non-metastatic MCF-7 cells and that CREB expression was further increased by several soluble factors linked to cancer progression, such as IL-1, IGF-1, and TGF-beta. Using wild-type CREB and a dominant-negative form (K-CREB), we found that CREB signaling positively regulated the proliferation, migration, and invasion of MDA-MB-231 cells. In addition, K-CREB prevented MDA-MB-231 cell-induced osteolytic lesions in a mouse model of cancer metastasis. Furthermore, CREB signaling in cancer cells regulated the gene expression of PTHrP, MMPs, and OPG, which are closely involved in cancer metastasis and bone destruction. These results indicate that breast cancer cells acquire CREB overexpression during their development and that this CREB upregulation plays an important role in multiple steps of breast cancer bone metastasis.
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77
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Li BX, Xiao X. Discovery of a small-molecule inhibitor of the KIX-KID interaction. Chembiochem 2009; 10:2721-4. [PMID: 19810079 PMCID: PMC4214275 DOI: 10.1002/cbic.200900552] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Indexed: 01/30/2023]
Affiliation(s)
- Bingbing X. Li
- Program in Chemical Biology, Department of Physiology and Pharmacology Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239 (USA), Fax: (+1) 503-494-4352
| | - Xiangshu Xiao
- Program in Chemical Biology, Department of Physiology and Pharmacology Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239 (USA), Fax: (+1) 503-494-4352
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78
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Makkonen KM, Malinen M, Ropponen A, Väisänen S, Carlberg C. Cell cycle regulatory effects of retinoic Acid and forskolin are mediated by the cyclin C gene. J Mol Biol 2009; 393:261-71. [PMID: 19683536 DOI: 10.1016/j.jmb.2009.08.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 07/30/2009] [Accepted: 08/05/2009] [Indexed: 11/22/2022]
Abstract
As a partner of cyclin-dependent kinase (CDK) 3, Cyclin C controls cellular proliferation and, together with CDK8, represses gene transcription. In this study, we showed that the highly expressed Cyclin C gene is a direct target of the nuclear hormone all-trans retinoic acid (RA) in HEK293 human embryonal kidney cells. The RA receptor (RAR) gamma associates with a Cyclin C promoter region containing two RAR binding sites. The Cyclin C gene also directly responds to the cAMP activator Forskolin via the transcription factor CREB1 (cAMP response element-binding protein 1), for which we identified four binding sites within the first 2250 bp of its promoter. RARgamma and CREB1 show functional convergence via the corepressor NCoR1, which controls in particular the Forskolin response of Cyclin C. The histone deacetylases 1, 5, 6, 7 and 11 are involved in the basal expression of Cyclin C, but in HEK293 and MCF-7 human breast carcinoma cells the antiproliferative effects of the histone deacetylase inhibitor SAHA (suberoylanilide hydroxamic acid) are not mediated by Cyclin C. However, cell cycle progressing effects of all-trans RA and Forskolin are dependent on Cyclin C expression levels. This suggests that the primary regulation of Cyclin C by all-trans RA and Forskolin mediates some of the cell cycle control actions of these compounds.
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79
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Liu CY, Chao TK, Su PH, Lee HY, Shih YL, Su HY, Chu TY, Yu MH, Lin YW, Lai HC. Characterization of LMX-1A as a metastasis suppressor in cervical cancer. J Pathol 2009; 219:222-31. [DOI: 10.1002/path.2589] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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80
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Linnerth NM, Siwicky MD, Campbell CI, Watson KLM, Petrik JJ, Whitsett JA, Moorehead RA. Type I insulin-like growth factor receptor induces pulmonary tumorigenesis. Neoplasia 2009; 11:672-82. [PMID: 19568412 PMCID: PMC2697353 DOI: 10.1593/neo.09310] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 04/13/2009] [Accepted: 04/13/2009] [Indexed: 11/18/2022]
Abstract
Despite the type I insulin-like growth factor receptor (IGF-IR) being highly expressed in more than 80% of human lung tumors, a transgenic model of IGF-IR overexpression in the lung has not been created. We produced two novel transgenic mouse models in which IGF-IR is overexpressed in either lung type II alveolar cells (surfactant protein C [SPC]-IGFIR) or Clara cells (CCSP-IGFIR) in a doxycycline-inducible manner. Overexpression of IGF-IR in either cell type caused multifocal adenomatous alveolar hyperplasia with papillary and solid adenomas. These tumors expressed thyroid transcription factor 1 and Kruppel-like factor 5 in most tumor cells. Similar to our previous work with lung tumors that developed in the mouse mammary tumor virus-IGF-II transgenic mice, the lung tumors that develop in the SPC-IGFIR and CCSP-IGFIR transgenic mice expressed high levels of the cyclic adenosine monophosphate response element binding protein that was localized primarily to the nucleus. Although elevated IGF-IR expression can initiate lung tumor development, tumors can become independent of IGF-IR signaling as IGF-IR down-regulation in established tumors produced tumor regression in some, but not all, of the tumors. These findings implicate IGF-IR as an important initiator of lung tumorigenesis and suggest that the SPC-IGFIR and CCSP-IGFIR transgenic mice can be used to further our understanding of human lung cancer and the role IGF-IR plays in this disease.
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Affiliation(s)
- Nicolle M Linnerth
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada
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81
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Sakamoto KM, Frank DA. CREB in the pathophysiology of cancer: implications for targeting transcription factors for cancer therapy. Clin Cancer Res 2009; 15:2583-7. [PMID: 19351775 DOI: 10.1158/1078-0432.ccr-08-1137] [Citation(s) in RCA: 211] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transcription factors are key regulators of the pattern of gene expression in a cell and directly control central processes such as proliferation, survival, self-renewal, and invasion. Given this critical role, the function of transcription factors is normally regulated closely, often through transient phosphorylation. Although transcription factors are not often directly modified by mutations in cancer cells, they frequently become activated constitutively through mutations affecting "upstream" pathways. By continually driving the expression of key target genes, these oncogenic transcription factors play a central role in tumor pathogenesis. One such transcription factor is the cAMP-regulatory element-binding protein (CREB), which can be activated through phosphorylation by a number of kinases, including Akt, p90Rsk, protein kinase A, and calcium/calmodulin-dependent kinases and regulates genes whose deregulated expression promotes oncogenesis, including cyclins, Bcl-2 family members, and Egr-1. CREB is overexpressed and constitutively phosphorylated in a number of forms of human cancer, including acute myeloid leukemia (AML) and non-small cell lung cancer, and appears to play a direct role in disease pathogenesis and prognosis. Although transcription factors have not been a central focus of drug development, recent advances suggest that CREB and other such proteins may be worthwhile targets for cancer therapy.
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Affiliation(s)
- Kathleen M Sakamoto
- Division of Hematology-Oncology, Gwynne Hazen Cherry Memorial Laboratories, Mattel Children's Hospital UCLA, Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
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82
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Sun H, Chung WC, Ryu SH, Ju Z, Tran HT, Kim E, Kurie JM, Koo JS. Cyclic AMP-responsive element binding protein- and nuclear factor-kappaB-regulated CXC chemokine gene expression in lung carcinogenesis. Cancer Prev Res (Phila) 2009; 1:316-28. [PMID: 19138976 DOI: 10.1158/1940-6207.capr-07-0002] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The recognition of the importance of angiogenesis in tumor progression has led to the development of antiangiogenesis as a new strategy for cancer treatment and prevention. By modulating tumor microenvironment and inducing angiogenesis, the proinflammatory cytokine interleukine (IL)-1beta has been reported to promote tumor development. However, the factors mediating IL-1beta-induced angiogenesis in non-small cell lung cancer (NSCLC) and the regulation of these angiogenic factors by IL-1beta are less clear. Here, we report that IL-1beta up-regulated an array of proangiogenic CXC chemokine genes in the NSCLC cell line A549 and in normal human tracheobronchial epithelium cells, as determined by microarray analysis. Further analysis revealed that IL-1beta induced much higher protein levels of CXC chemokines in NSCLC cells than in normal human tracheobronchial epithelium cells. Conditioned medium from IL-1beta-treated A549 cells markedly increased endothelial cell migration, which was suppressed by neutralizing antibodies against CXCL5 and CXCR2. We also found that IL-1beta-induced CXC chemokine gene overexpression in NSCLC cells was abrogated with the knockdown of cyclic AMP-responsive element binding protein (CREB) or nuclear factor kappaB (NF-kappaB). Moreover, the expression of the CXC chemokine genes as well as CREB and NF-kappaB activities was greatly increased in the tumorigenic NSCLC cell line compared with normal, premalignant immortalized or nontumorigenic cell lines. A disruptor of the interaction between CREB-binding protein and transcription factors such as CREB and NF-kappaB, 2-naphthol-AS-E-phosphate (KG-501), inhibited IL-1beta-induced CXC chemokine gene expression and angiogenic activity in NSCLC. We propose that targeting CREB or NF-kappaB using small-molecule inhibitors, such as KG-501, holds promise as a preventive and/or therapeutic approach for NSCLC.
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Affiliation(s)
- Hongxia Sun
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
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