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Gong H, An S, Sassmann A, Liu M, Mastej V, Mittal M, Zhang W, Hong Z, Offermanns S, Rehman J, Malik AB. PAR1 Scaffolds TGFβRII to Downregulate TGF-β Signaling and Activate ESC Differentiation to Endothelial Cells. Stem Cell Reports 2016; 7:1050-1058. [PMID: 27866874 PMCID: PMC5161529 DOI: 10.1016/j.stemcr.2016.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 10/14/2016] [Accepted: 10/17/2016] [Indexed: 01/08/2023] Open
Abstract
We studied the function of the G-protein-coupled receptor PAR1 in mediating the differentiation of mouse embryonic stem cells (mESCs) to endothelial cells (ECs) that are capable of inducing neovascularization. We observed that either deletion or activation of PAR1 suppressed mouse embryonic stem cell (mESC) differentiation to ECs and neovascularization in mice. This was mediated by induction of TGFβRII/TGFβRI interaction, forming an active complex, which in turn induced SMAD2 phosphorylation. Inhibition of TGF-β signaling in PAR1-deficient mESCs restored the EC differentiation potential of mESCs. Thus, PAR1 in its inactive unligated state functions as a scaffold for TGFβRII to downregulate TGF-β signaling, and thereby promote ESC transition to functional ECs. The PAR1 scaffold function in ESCs is an essential mechanism for dampening TGF-β signaling and regulating ESC differentiation. ESC differentiation to ECs is regulated by PAR1 activity and expression in mESCs Deletion of PAR1 suppresses EC generation and neovessel formation PAR1 acts as a scaffolding partner for TGFβRII and suppresses TGF-β signaling in ESCs
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Affiliation(s)
- Haixia Gong
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Shejuan An
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Antonia Sassmann
- Department of Pharmacology, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Menglin Liu
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Victoria Mastej
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Manish Mittal
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Wei Zhang
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Zhigang Hong
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Stefan Offermanns
- Department of Pharmacology, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Jalees Rehman
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA
| | - Asrar B Malik
- Department of Pharmacology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA; The Center for Lung and Vascular Biology, University of Illinois, College of Medicine, 835 South Wolcott Avenue, Room E403, Chicago, IL 60612, USA.
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202
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Wang T, Shigdar S, Gantier MP, Hou Y, Wang L, Li Y, Shamaileh HA, Yin W, Zhou SF, Zhao X, Duan W. Cancer stem cell targeted therapy: progress amid controversies. Oncotarget 2016; 6:44191-206. [PMID: 26496035 PMCID: PMC4792551 DOI: 10.18632/oncotarget.6176] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 10/06/2015] [Indexed: 12/12/2022] Open
Abstract
Although cancer stem cells have been well characterized in numerous malignancies, the fundamental characteristics of this group of cells, however, have been challenged by some recent observations: cancer stem cells may not necessary to be rare within tumors; cancer stem cells and non-cancer stem cells may undergo reversible phenotypic changes; and the cancer stem cells phenotype can vary substantially between patients. Here the current status and progresses of cancer stem cells theory is illustrated and via providing a panoramic view of cancer therapy, we addressed the recent controversies regarding the feasibility of cancer stem cells targeted anti-cancer therapy.
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Affiliation(s)
- Tao Wang
- School of Nursing, Zhengzhou University, Zhengzhou, China.,School of Medicine, Deakin University, Waurn Ponds, Victoria, Australia
| | - Sarah Shigdar
- School of Medicine, Deakin University, Waurn Ponds, Victoria, Australia
| | - Michael P Gantier
- Centre for Cancer Research, Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
| | - Yingchun Hou
- Co-Innovation Center for Qinba Region's Sustainable Development, Shaanxi Normal University, Xi'an, China
| | - Li Wang
- Department of Gynecologic Oncology, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Yong Li
- Cancer Care Centre, St George Hospital and St George Clinical School, University of New South Wales (UNSW), Kensington, Australia
| | - Hadi Al Shamaileh
- School of Medicine, Deakin University, Waurn Ponds, Victoria, Australia
| | - Wang Yin
- School of Medicine, Deakin University, Waurn Ponds, Victoria, Australia
| | - Shu-Feng Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, USA
| | - Xinhan Zhao
- Department of Medical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Wei Duan
- School of Medicine, Deakin University, Waurn Ponds, Victoria, Australia
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203
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Wang X, Jia Y, Fei C, Song X, Li L. Activation/Proliferation-associated Protein 2 (Caprin-2) Positively Regulates CDK14/Cyclin Y-mediated Lipoprotein Receptor-related Protein 5 and 6 (LRP5/6) Constitutive Phosphorylation. J Biol Chem 2016; 291:26427-26434. [PMID: 27821587 DOI: 10.1074/jbc.m116.744607] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 11/03/2016] [Indexed: 01/13/2023] Open
Abstract
Low-density lipoprotein receptor-related proteins 5 and 6 (LRP5/6) are co-receptors for Wnt ligands. Upon ligand binding, LRP5/6 undergo glycogen synthase kinase 3 (GSK3)/casein kinase I (CKI)-mediated phosphorylation at multiple PPP(S/T)P motifs in the intracellular domain, which is essential for canonical Wnt signal transduction. On the other hand, in the Wnt-off state, the mitosis-specific CDK14-Cyclin Y kinase complex phosphorylates Ser-1490 of LRP5/6 at G2/M, thereby priming the receptor for Wnt-induced phosphorylation. However, it remains unclear how CDK14/Cyclin Y is recruited to LRP5/6 and whether there are other cofactors involved in this process. Previously, we identified Caprin-2 as a positive regulator of canonical Wnt signaling by promoting GSK3-depedent LRP5/6 phosphorylation upon Wnt stimulation. Here we uncovered that Caprin-2 positively regulates constitutive LRP5/6 Ser-1490 phosphorylation by complexing with CDK14/Cyclin Y. Caprin-2-mediated LRP5/6 phosphorylation is cell cycle-dependent in a pattern similar to that of CDK14/Cyclin Y-dependent LRP5/6 phosphorylation. Moreover, knockdown of Caprin-2 disrupts not only the interaction between CDK14 and Cyclin Y but also the interaction between CDK14/Cyclin Y and LRP6. Overall, our findings revealed an unrecognized role of Caprin-2 in facilitating LRP5/6 constitutive phosphorylation at G2/M through forming a quaternary complex with CDK14, Cyclin Y, and LRP5/6.
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Affiliation(s)
- Xin Wang
- From the State Key Laboratory of Molecular Biology, Chinese Academy of Sciences Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yingying Jia
- From the State Key Laboratory of Molecular Biology, Chinese Academy of Sciences Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Cong Fei
- From the State Key Laboratory of Molecular Biology, Chinese Academy of Sciences Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaomin Song
- From the State Key Laboratory of Molecular Biology, Chinese Academy of Sciences Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Lin Li
- From the State Key Laboratory of Molecular Biology, Chinese Academy of Sciences Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
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204
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ASBEL-TCF3 complex is required for the tumorigenicity of colorectal cancer cells. Proc Natl Acad Sci U S A 2016; 113:12739-12744. [PMID: 27791078 DOI: 10.1073/pnas.1605938113] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Wnt/β-catenin signaling plays a key role in the tumorigenicity of colon cancer. Furthermore, it has been reported that lncRNAs are dysregulated in several steps of cancer development. Here we show that β-catenin directly activates the transcription of the long noncoding RNA (lncRNA) ASBEL [antisense ncRNA in the ANA (Abundant in neuroepithelium area)/BTG3 (B-cell translocation gene 3) locus] and transcription factor 3 (TCF3), both of which are required for the survival and tumorigenicity of colorectal cancer cells. ASBEL interacts with and recruits TCF3 to the activating transcription factor 3 (ATF3) locus, where it represses the expression of ATF3. Furthermore, we demonstrate that ASBEL-TCF3-mediated down-regulation of ATF3 expression is required for the proliferation and tumorigenicity of colon tumor cells. ATF3, in turn, represses the expression of ASBEL Our results reveal a pathway involving an lncRNA and two transcription factors that plays a key role in Wnt/β-catenin-mediated tumorigenesis. These results may provide insights into the variety of biological and pathological processes regulated by Wnt/β-catenin signaling.
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205
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Gonzalez-Fernandez C, Arevalo-Martin A, Paniagua-Torija B, Ferrer I, Rodriguez FJ, Garcia-Ovejero D. Wnts Are Expressed in the Ependymal Region of the Adult Spinal Cord. Mol Neurobiol 2016; 54:6342-6355. [PMID: 27722925 DOI: 10.1007/s12035-016-0132-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022]
Abstract
The Wnt family of proteins plays key roles during central nervous system development and in several physiological processes during adulthood. Recently, experimental evidence has linked Wnt-related genes to regulation and maintenance of stem cells in the adult neurogenic niches. In the spinal cord, the ependymal cells surrounding the central canal form one of those niches, but little is known about their Wnt expression patterns. Using microdissection followed by TaqMan® low-density arrays, we show here that the ependymal regions of young, mature rats and adult humans express several Wnt-related genes, including ligands, conventional and non-conventional receptors, co-receptors, and soluble inhibitors. We found 13 genes shared between rats and humans, 4 exclusively expressed in rats and 9 expressed only in humans. Also, we observed a reduction with age on spontaneous proliferation of ependymal cells in rats paralleled by a decrease in the expression of Fzd1, Fzd8, and Fzd9. Our results suggest a role for Wnts in the regulation of the adult spinal cord neurogenic niche and provide new data on the specific differences in this region between humans and rodents.
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Affiliation(s)
- Carlos Gonzalez-Fernandez
- Laboratory of Molecular Neurology, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Angel Arevalo-Martin
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Beatriz Paniagua-Torija
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Isidro Ferrer
- Institut de Neuropatologia, Serveid'AnatomiaPatològica, IDIBELL-Hospital Universitari de Bellvitge, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain
| | - Francisco J Rodriguez
- Laboratory of Molecular Neurology, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain.
| | - Daniel Garcia-Ovejero
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain.
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206
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Shen Y, Wang Q, Tian Y. Reversal effect of ouabain on multidrug resistance in esophageal carcinoma EC109/CDDP cells by inhibiting the translocation of Wnt/β-catenin into the nucleus. Tumour Biol 2016; 37:10.1007/s13277-016-5437-8. [PMID: 27709549 DOI: 10.1007/s13277-016-5437-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 09/23/2016] [Indexed: 11/27/2022] Open
Abstract
The incidence of esophageal carcinoma is increasing throughout the world. A major obstacle to its treatment is acquired multidrug resistance (MDR) which results in the failure of chemotherapy and patient relapse. Here, we identified that ouabain is capable of reversing MDR to cisplatin (CDDP) in EC109/CDDP cells and explore the possible mechanisms of action. The parental and the MDR cell lines were both sensitive to ouabain with 50 % inhibitory concentration (IC50) values of 258.11 and 710.63 nM, respectively. Cisplatin cytotoxicity increased in the EC109/CDDP cells by the addition of ouabain which helps promote CDDP-induced apoptosis. Ouabain at 20 nM effectively reduced the IC50 of CDDP in EC109/CDDP cells from 36.54 to 3.39 μM. This represents a 10.78-fold increase in sensitization to CDDP. We also found that ouabain was capable of down regulating the expression of P-glycoprotein (P-gp) and Bcl-2 in a dose- and time-dependent manner. Finally, the results indicated that ouabain suppressed Wnt luciferase report (TOPFlash) activity obviously in EC109/CDDP and depressed the translocation of β-catenin into the nucleus. Moreover, ouabain showed reversal effect of MDR to CDDP in nude mouse xenograft model, and reduced the protein level of β-catenin (Y333) in tumor tissue of CDDP plus ouabain group. All data proved that ouabain has a potent β-catenin-dependent anti-MDR effect.
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Affiliation(s)
- Yucheng Shen
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China
- Institute of Radiotherapy and Oncology, Soochow University, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China
- Suzhou Key Laboratory for Radiation Oncology, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China
- Department of Oncology, Affiliated Haian Hospital of Nantong University, Zhongba Middle Road, No. 17, Haian Town, Haian County, Nantong, Jiangsu, 226601, China
| | - Qinghua Wang
- Laboratory Animal Center of Nantong University, Qi Xiu Road No.19, Nantong, Jiangsu, 210061, China
| | - Ye Tian
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China.
- Institute of Radiotherapy and Oncology, Soochow University, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China.
- Suzhou Key Laboratory for Radiation Oncology, San Xiang Road No. 1055, Suzhou, Jiangsu, 215004, China.
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207
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Cabillic F, Corlu A. Regulation of Transdifferentiation and Retrodifferentiation by Inflammatory Cytokines in Hepatocellular Carcinoma. Gastroenterology 2016; 151:607-15. [PMID: 27443822 DOI: 10.1053/j.gastro.2016.06.052] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 06/14/2016] [Accepted: 06/29/2016] [Indexed: 01/02/2023]
Abstract
Liver cancers are typically inflammation-associated cancers characterized by close communication between the tumor cells and the tumor environment. This supportive inflammatory environment contributes to the establishment of a pathologic niche consisting of transformed epithelial cells, tumor-educated fibroblasts, endothelial cells, and immunosuppressive immature myeloid cells. Stromal and infiltrated immune cells help determine tumor fate, but the tumor cells themselves, including cancer stem cells, also influence the surrounding cells. This bidirectional communication generates an intricate network of signals that promotes tumor growth. Cell plasticity, which includes transdifferentiation and retrodifferentiation of differentiated cells, increases tumor heterogeneity. Plasticity allows non-cancer stem cells to replenish the cancer stem cell pool, initiate tumorigenesis, and escape the effects of therapeutic agents; it also promotes tumor aggressiveness. There is increasing evidence that an inflammatory environment promotes the retrodifferentiation of tumor cells into stem or progenitor cells; this could account for the low efficacies of some chemotherapies and the high rates of cancer recurrence. Increasing our understanding of the signaling network that connects inflammation with retrodifferentiation could identify new therapeutic targets, and lead to combined therapies that are effective against highly heterogeneous tumors.
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Affiliation(s)
- Florian Cabillic
- Institut National de la Santé et de la Recherche Médicale, UMR 991, Liver Metabolism and Cancer, Hôpital Pontchaillou, Rennes, France; Université de Rennes 1, Rennes, France; Laboratoire de Cytogénétique et Biologie Cellulaire, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Anne Corlu
- Institut National de la Santé et de la Recherche Médicale, UMR 991, Liver Metabolism and Cancer, Hôpital Pontchaillou, Rennes, France; Université de Rennes 1, Rennes, France.
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208
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Song K, Kwon H, Han C, Zhang J, Dash S, Lim K, Wu T. Active glycolytic metabolism in CD133(+) hepatocellular cancer stem cells: regulation by MIR-122. Oncotarget 2016; 6:40822-35. [PMID: 26506419 PMCID: PMC4747371 DOI: 10.18632/oncotarget.5812] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 09/23/2015] [Indexed: 02/07/2023] Open
Abstract
Although altered metabolic pathway is an important diagnostic maker and therapeutic target in cancer, it is poorly understood in cancer stem cells (CSCs). Here we show that the CD133 (+) hepatocellular CSCs have distinct metabolic properties, characterized by more active glycolysis over oxidative phosphorylation, compared to the CD133 (−) cells. Inhibition of PDK4 and LDHA markedly suppresses CD133 (+) stemness characteristics and overcome resistance to sorafenib (current chemotherapeutic agent for hepatocellular cancer). Addition of glucose or lactate to CD133 (−) cells promotes CSC phenotypes, as evidenced by increased CD133 (+) cell population, elevated stemness gene expression and enhanced spheroid formation. Furthermore, the liver-specific miRNA, miR-122, inhibits CSC phenotypes by regulating glycolysis through targeting PDK4. Our findings suggest that enhanced glycolysis is associated with CD133 (+) stem-like characteristics and that metabolic reprogramming through miR-122 or PDK4 may represent a novel therapeutic approach for the treatment of hepatocellular cancer.
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Affiliation(s)
- Kyoungsub Song
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Hyunjoo Kwon
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Chang Han
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Jinqiang Zhang
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Srikanta Dash
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Kyu Lim
- Department of Biochemistry, College of Medicine, Cancer Research Institute and Infection Signaling Network Research Center, Chungnam National University, Daejeon, Korea
| | - Tong Wu
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, USA
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209
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Stella GM, Gentile A, Baderacchi A, Meloni F, Milan M, Benvenuti S. Ockham's razor for the MET-driven invasive growth linking idiopathic pulmonary fibrosis and cancer. J Transl Med 2016; 14:256. [PMID: 27590450 PMCID: PMC5010719 DOI: 10.1186/s12967-016-1008-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/16/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) identifies a specific lung disorder characterized by chronic, progressive fibrosing interstitial pneumonia of unknown etiology, which lacks effective treatment. According to the current pathogenic perspective, the aberrant proliferative events in IPF resemble those occurring during malignant transformation. MAIN BODY Receptor tyrosine kinases (RTK) are known to be key players in cancer onset and progression. It has been demonstrated that RTK expression is sometimes also altered and even druggable in IPF. One example of an RTK-the MET proto-oncogene-is a key regulator of invasive growth. This physiological genetic program supports embryonic development and post-natal organ regeneration, as well as cooperating in the evolution of cancer metastasis when aberrantly activated. Growing evidence sustains that MET activation may collaborate in maintaining tissue plasticity and the regenerative potential that characterizes IPF. CONCLUSION The present work aims to elucidate-by applying the logic of simplicity-the bio-molecular mechanisms involved in MET activation in IPF. This clarification is crucial to accurately design MET blockade strategies within a fully personalized approach to IPF.
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Affiliation(s)
- Giulia M. Stella
- Pneumology Unit, Cardiothoracic and Vascular Department, IRCCS Policlinico San Matteo Foundation and University of Pavia Medical School, Piazzale Golgi 19, 27100 Pavia, Italy
- Investigational Clinical Oncology (INCO), IRCCS Candiolo Cancer Institute-FPO, Candiolo, 20060 Turin, Italy
| | - Alessandra Gentile
- Experimental Clinical Molecular Oncology (ECMO), IRCCS Candiolo Cancer Institute-FPO, Candiolo, 20060 Turin, Italy
| | - Alice Baderacchi
- Investigational Clinical Oncology (INCO), IRCCS Candiolo Cancer Institute-FPO, Candiolo, 20060 Turin, Italy
| | - Federica Meloni
- Pneumology Unit, Cardiothoracic and Vascular Department, IRCCS Policlinico San Matteo Foundation and University of Pavia Medical School, Piazzale Golgi 19, 27100 Pavia, Italy
| | - Melissa Milan
- Experimental Clinical Molecular Oncology (ECMO), IRCCS Candiolo Cancer Institute-FPO, Candiolo, 20060 Turin, Italy
| | - Silvia Benvenuti
- Experimental Clinical Molecular Oncology (ECMO), IRCCS Candiolo Cancer Institute-FPO, Candiolo, 20060 Turin, Italy
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210
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Onyido EK, Sweeney E, Nateri AS. Wnt-signalling pathways and microRNAs network in carcinogenesis: experimental and bioinformatics approaches. Mol Cancer 2016; 15:56. [PMID: 27590724 PMCID: PMC5010773 DOI: 10.1186/s12943-016-0541-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 08/26/2016] [Indexed: 02/02/2023] Open
Abstract
Over the past few years, microRNAs (miRNAs) have not only emerged as integral regulators of gene expression at the post-transcriptional level but also respond to signalling molecules to affect cell function(s). miRNAs crosstalk with a variety of the key cellular signalling networks such as Wnt, transforming growth factor-β and Notch, control stem cell activity in maintaining tissue homeostasis, while if dysregulated contributes to the initiation and progression of cancer. Herein, we overview the molecular mechanism(s) underlying the crosstalk between Wnt-signalling components (canonical and non-canonical) and miRNAs, as well as changes in the miRNA/Wnt-signalling components observed in the different forms of cancer. Furthermore, the fundamental understanding of miRNA-mediated regulation of Wnt-signalling pathway and vice versa has been significantly improved by high-throughput genomics and bioinformatics technologies. Whilst, these approaches have identified a number of specific miRNA(s) that function as oncogenes or tumour suppressors, additional analyses will be necessary to fully unravel the links among conserved cellular signalling pathways and miRNAs and their potential associated components in cancer, thereby creating therapeutic avenues against tumours. Hence, we also discuss the current challenges associated with Wnt-signalling/miRNAs complex and the analysis using the biomedical experimental and bioinformatics approaches.
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Affiliation(s)
- Emenike K Onyido
- Cancer Genetics & Stem Cell Group, Cancer Biology Unit, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Eloise Sweeney
- Cancer Genetics & Stem Cell Group, Cancer Biology Unit, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Abdolrahman Shams Nateri
- Cancer Genetics & Stem Cell Group, Cancer Biology Unit, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, NG7 2UH, UK.
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211
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Abstract
Tissue development and homeostasis are governed by the actions of stem cells. Multipotent cells are capable of self-renewal during the course of one's lifetime. The accurate and appropriate regulation of stem cell functions is absolutely critical for normal biological activity. Several key developmental or signaling pathways have been shown to play essential roles in this regulatory capacity. Specifically, the Janus-activated kinase/signal transducer and activator of transcription, Hedgehog, Wnt, Notch, phosphatidylinositol 3-kinase/phosphatase and tensin homolog, and nuclear factor-κB signaling pathways have all been shown experimentally to mediate various stem cell properties, such as self-renewal, cell fate decisions, survival, proliferation, and differentiation. Unsurprisingly, many of these crucial signaling pathways are dysregulated in cancer. Growing evidence suggests that overactive or abnormal signaling within and among these pathways may contribute to the survival of cancer stem cells (CSCs). CSCs are a relatively rare population of cancer cells capable of self-renewal, differentiation, and generation of serially transplantable heterogeneous tumors of several types of cancer.
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Affiliation(s)
- William H. Matsui
- The Matsui Laboratory, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD
- Correspondence: William H. Matsui, The Johns Hopkins University School of Medicine, Baltimore, MD 21287 (e-mail: )
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212
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Reddivari L, Charepalli V, Radhakrishnan S, Vadde R, Elias RJ, Lambert JD, Vanamala JKP. Grape compounds suppress colon cancer stem cells in vitro and in a rodent model of colon carcinogenesis. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 16:278. [PMID: 27506388 PMCID: PMC4977641 DOI: 10.1186/s12906-016-1254-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 07/29/2016] [Indexed: 12/22/2022]
Abstract
Background We have previously shown that the grape bioactive compound resveratrol (RSV) potentiates grape seed extract (GSE)-induced colon cancer cell apoptosis at physiologically relevant concentrations. However, RSV-GSE combination efficacy against colon cancer stem cells (CSCs), which play a key role in chemotherapy and radiation resistance, is not known. Methods We tested the anti-cancer efficacy of the RSV-GSE against colon CSCs using isolated human colon CSCs in vitro and an azoxymethane-induced mouse model of colon carcinogenesis in vivo. Results RSV-GSE suppressed tumor incidence similar to sulindac, without any gastrointestinal toxicity. Additionally, RSV-GSE treatment reduced the number of crypts containing cells with nuclear β-catenin (an indicator of colon CSCs) via induction of apoptosis. In vitro, RSV-GSE suppressed - proliferation, sphere formation, nuclear translocation of β-catenin (a critical regulator of CSC proliferation) similar to sulindac in isolated human colon CSCs. RSV-GSE, but not sulindac, suppressed downstream protein levels of Wnt/β-catenin pathway, c-Myc and cyclin D1. RSV-GSE also induced mitochondrial-mediated apoptosis in colon CSCs characterized by elevated p53, Bax/Bcl-2 ratio and cleaved PARP. Furthermore, shRNA-mediated knockdown of p53, a tumor suppressor gene, in colon CSCs did not alter efficacy of RSV-GSE. Conclusion The suppression of Wnt/β-catenin signaling and elevated mitochondrial-mediated apoptosis in colon CSCs support potential clinical testing/application of grape bioactives for colon cancer prevention and/or therapy. Electronic supplementary material The online version of this article (doi:10.1186/s12906-016-1254-2) contains supplementary material, which is available to authorized users.
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213
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Wu K, Ma L, Zhu J. miR‑483‑5p promotes growth, invasion and self‑renewal of gastric cancer stem cells by Wnt/β‑catenin signaling. Mol Med Rep 2016; 14:3421-8. [PMID: 27511210 DOI: 10.3892/mmr.2016.5603] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 07/11/2016] [Indexed: 12/14/2022] Open
Abstract
Gastric carcinoma (GC) ranks as the second most common cause of cancer‑associated mortality worldwide. Emerging evidence has suggested a potential novel therapeutic strategy based on the ability of cancer stem cells (CSCs) to trigger tumorigenesis. MicroRNAs (miRNAs) have previously been implicated in CSC formation and regulation of their functional characteristics. In the current study, a significant upregulation of miR‑483‑5p levels was demonstrated in spheroid body‑forming cells (P<0.01) by reverse transcription‑quantitative polymerase chain reaction, which were isolated from the MKN‑45 gastric cancer cell line and possessed gastric CSC (GCSC) properties. An MTT assay demonstrated that overexpression of miR‑483‑5p by transfection with miR‑483‑5p mimics significantly increased cell proliferation and Annexin V‑propidium iodide staining indicated the suppression of cell apoptosis, suggesting that miR‑483‑5p has an important function in GCSC growth. Notably, Transwell and sphere formation assays demonstrated that miR‑483‑5p elevation promoted GCSC invasion and cell self‑renewal ability, respectively. Further western blotting assays demonstrated that miR‑483‑5p upregulation induced an increase in the protein expression levels of β‑catenin and its downstream target molecules, including cyclin D1, Bcl‑2 and matrix metalloproteinase 2, indicating that miR‑483‑5p activates Wnt/β‑catenin signaling. Inhibition of this pathway by β‑catenin small interfering RNA transfection attenuated the miR‑483‑5p‑induced effects on cell growth, invasion and self‑renewal. These results demonstrate that miR‑483‑5p may act as an oncogene to promote the development of GC by regulating GCSC growth, invasion and self‑renewal via the Wnt/β‑catenin signaling pathway. Thus, the present study suggests that miR‑483‑5p may be a promising therapeutic target against GC.
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Affiliation(s)
- Kai Wu
- Department of General Surgery, The Third Affiliated Hospital (Shaanxi Provincial People's Hospital), Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Longan Ma
- Department of General Surgery, The Third Affiliated Hospital (Shaanxi Provincial People's Hospital), Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Jinxiang Zhu
- Department of General Surgery, The Third Affiliated Hospital (Shaanxi Provincial People's Hospital), Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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214
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Indian gooseberry (Emblica officinalis Gaertn.) suppresses cell proliferation and induces apoptosis in human colon cancer stem cells independent of p53 status via suppression of c-Myc and cyclin D1. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.06.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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215
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Riquelme I, Saavedra K, Espinoza JA, Weber H, García P, Nervi B, Garrido M, Corvalán AH, Roa JC, Bizama C. Molecular classification of gastric cancer: Towards a pathway-driven targeted therapy. Oncotarget 2016; 6:24750-79. [PMID: 26267324 PMCID: PMC4694793 DOI: 10.18632/oncotarget.4990] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/17/2015] [Indexed: 02/07/2023] Open
Abstract
Gastric cancer (GC) is the third leading cause of cancer mortality worldwide. Although surgical resection is a potentially curative approach for localized cases of GC, most cases of GC are diagnosed in an advanced, non-curable stage and the response to traditional chemotherapy is limited. Fortunately, recent advances in our understanding of the molecular mechanisms that mediate GC hold great promise for the development of more effective treatment strategies. In this review, an overview of the morphological classification, current treatment approaches, and molecular alterations that have been characterized for GC are provided. In particular, the most recent molecular classification of GC and alterations identified in relevant signaling pathways, including ErbB, VEGF, PI3K/AKT/mTOR, and HGF/MET signaling pathways, are described, as well as inhibitors of these pathways. An overview of the completed and active clinical trials related to these signaling pathways are also summarized. Finally, insights regarding emerging stem cell pathways are described, and may provide additional novel markers for the development of therapeutic agents against GC. The development of more effective agents and the identification of biomarkers that can be used for the diagnosis, prognosis, and individualized therapy for GC patients, have the potential to improve the efficacy, safety, and cost-effectiveness for GC treatments.
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Affiliation(s)
- Ismael Riquelme
- Department of Pathology, School of Medicine, Universidad de La Frontera, CEGIN-BIOREN, Temuco, Chile
| | - Kathleen Saavedra
- Department of Pathology, School of Medicine, Universidad de La Frontera, CEGIN-BIOREN, Temuco, Chile
| | - Jaime A Espinoza
- Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Helga Weber
- Department of Pathology, School of Medicine, Universidad de La Frontera, CEGIN-BIOREN, Temuco, Chile
| | - Patricia García
- Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Bruno Nervi
- UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Hematology Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,Millennium Institute on Immunology and Immunotherapy, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcelo Garrido
- UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Hematology Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alejandro H Corvalán
- UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Hematology Oncology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDIS), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Juan Carlos Roa
- Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDIS), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Carolina Bizama
- Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.,UC-Center for Investigational Oncology (CITO), Pontificia Universidad Católica de Chile, Santiago, Chile
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216
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Makinde AY, Eke I, Aryankalayil MJ, Ahmed MM, Coleman CN. Exploiting Gene Expression Kinetics in Conventional Radiotherapy, Hyperfractionation, and Hypofractionation for Targeted Therapy. Semin Radiat Oncol 2016; 26:254-60. [PMID: 27619247 DOI: 10.1016/j.semradonc.2016.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The dramatic changes in the technological delivery of radiation therapy, the repertoire of molecular targets for which pathway inhibitors are available, and the cellular and immunologic responses that can alter long-term clinical outcome provide a potentially unique role for using the radiation-inducible changes as therapeutic targets. Various mathematical models of dose and fractionation are extraordinarily useful in guiding treatment regimens. However, although the model may fit the clinical outcome, a deeper understanding of the molecular and cellular effect of the individual dose size and the adaptation to repeated exposure, called multifraction (MF) adaptation, may provide new therapeutic targets for use in combined modality treatments using radiochemotherapy and radioimmunotherapy. We discuss the potential of using different radiation doses and MF adaptation for targeting transcription factors, immune and inflammatory response, and cell "stemness." Given the complex genetic composition of tumors before treatment and their adaptation to drug treatment, innovative combinations using both the pretreatment molecular data and also the MF-adaptive response to radiation may provide an important role for focused radiation therapy as an integral part of precision medicine and immunotherapy.
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Affiliation(s)
- Adeola Y Makinde
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD.
| | - Iris Eke
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Molykutty J Aryankalayil
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Mansoor M Ahmed
- Radiation Research Program, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - C Norman Coleman
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD; Radiation Research Program, National Cancer Institute, National Institutes of Health, Bethesda, MD
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217
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S100A4 in Cancer Metastasis: Wnt Signaling-Driven Interventions for Metastasis Restriction. Cancers (Basel) 2016; 8:cancers8060059. [PMID: 27331819 PMCID: PMC4931624 DOI: 10.3390/cancers8060059] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 05/27/2016] [Accepted: 06/09/2016] [Indexed: 02/07/2023] Open
Abstract
The aberrant activity of Wnt signaling is an early step in the transformation of normal intestinal cells to malignant tissue, leading to more aggressive tumors, and eventually metastases. In colorectal cancer (CRC), metastasis accounts for about 90% of patient deaths, representing the most lethal event during the course of the disease and is directly linked to patient survival, critically limiting successful therapy. This review focuses on our studies of the metastasis-inducing gene S100A4, which we identified as transcriptional target of β-catenin. S100A4 increased migration and invasion in vitro and metastasis in mice. In patient CRC samples, high S100A4 levels predict metastasis and reduced patient survival. Our results link pathways important for tumor progression and metastasis: the Wnt signaling pathway and S100A4, which regulates motility and invasiveness. S100A4 suppression by interdicting Wnt signaling has potential for therapeutic intervention. As proof of principle, we applied S100A4 shRNA systemically and prevented metastasis in mice. Furthermore, we identified small molecule inhibitors from high-throughput screens of pharmacologically active compounds employing an S100A4 promoter-driven reporter. Best hits act, as least in part, via intervening in the Wnt pathway and restricted metastasis in mouse models. We currently translate our findings on restricting S100A4-driven metastasis into clinical practice. The repositioned FDA-approved drug niclosamide, targeting Wnt signaling, is being tested in a prospective phase II clinical trial for treatment of CRC patients. Our assay for circulating S100A4 transcripts in patient blood is used to monitor treatment success.
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218
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Gerhardt C, Leu T, Lier JM, Rüther U. The cilia-regulated proteasome and its role in the development of ciliopathies and cancer. Cilia 2016; 5:14. [PMID: 27293550 PMCID: PMC4901515 DOI: 10.1186/s13630-016-0035-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 02/29/2016] [Indexed: 12/21/2022] Open
Abstract
The primary cilium is an essential structure for the mediation of numerous signaling pathways involved in the coordination and regulation of cellular processes essential for the development and maintenance of health. Consequently, ciliary dysfunction results in severe human diseases called ciliopathies. Since many of the cilia-mediated signaling pathways are oncogenic pathways, cilia are linked to cancer. Recent studies demonstrate the existence of a cilia-regulated proteasome and that this proteasome is involved in cancer development via the progression of oncogenic, cilia-mediated signaling. This review article investigates the association between primary cilia and cancer with particular emphasis on the role of the cilia-regulated proteasome.
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Affiliation(s)
- Christoph Gerhardt
- Institute for Animal Developmental and Molecular Biology, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Tristan Leu
- Institute for Animal Developmental and Molecular Biology, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Johanna Maria Lier
- Institute for Animal Developmental and Molecular Biology, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Ulrich Rüther
- Institute for Animal Developmental and Molecular Biology, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
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219
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Chai S, Xu X, Wang Y, Zhou Y, Zhang C, Yang Y, Yang Y, Xu H, Xu R, Wang K. Ca2+/calmodulin-dependent protein kinase IIγ enhances stem-like traits and tumorigenicity of lung cancer cells. Oncotarget 2016; 6:16069-83. [PMID: 25965829 PMCID: PMC4599257 DOI: 10.18632/oncotarget.3866] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 03/31/2015] [Indexed: 01/06/2023] Open
Abstract
Highly tumorigenic stem-like cells, considered tumor-initiating cells (TICs), are the main cause of lung cancer initiation, relapse, and drug resistance. In this study, we identified that Ca2+/calmodulin-dependent protein kinase IIγ (CaMKIIγ) was aberrantly expressed in highly tumorigenic stem-like lung cancer cells, and was also correlated with poor prognosis in human lung cancer. Functionally, CaMKIIγ enhanced stem-like traits and the tumorigenicity of lung cancer cells in an Akt- and β-catenin-dependent manner. In addition, we found that CaMKIIγ upregulated Oct4 expression via Akt-mediated histone acetylation. Taken together, our findings reveal a critical role of CaMKIIγ in regulating the stemness and tumorigenicity of lung cancer cells and offer a promising therapeutic target for TICs.
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Affiliation(s)
- Shoujie Chai
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xia Xu
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yongfang Wang
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - You Zhou
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chenchen Zhang
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yiming Yang
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ying Yang
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Haiyan Xu
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Rongzhen Xu
- Department of Hematology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Kai Wang
- Department of Respiratory Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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220
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Edeling M, Ragi G, Huang S, Pavenstädt H, Susztak K. Developmental signalling pathways in renal fibrosis: the roles of Notch, Wnt and Hedgehog. Nat Rev Nephrol 2016; 12:426-39. [PMID: 27140856 DOI: 10.1038/nrneph.2016.54] [Citation(s) in RCA: 279] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Kidney fibrosis is a common histological manifestation of functional decline in the kidney. Fibrosis is a reactive process that develops in response to excessive epithelial injury and inflammation, leading to myofibroblast activation and an accumulation of extracellular matrix. Here, we describe how three key developmental signalling pathways - Notch, Wnt and Hedgehog (Hh) - are reactivated in response to kidney injury and contribute to the fibrotic response. Although transient activation of these pathways is needed for repair of injured tissue, their sustained activation is thought to promote fibrosis. Excessive Wnt and Notch expression prohibit epithelial differentiation, whereas increased Wnt and Hh expression induce fibroblast proliferation and myofibroblastic transdifferentiation. Notch, Wnt and Hh are fundamentally different signalling pathways, but their choreographed activation seems to be just as important for fibrosis as it is for embryonic kidney development. Decreasing the activity of Notch, Wnt or Hh signalling could potentially provide a new therapeutic strategy to ameliorate the development of fibrosis in chronic kidney disease.
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Affiliation(s)
- Maria Edeling
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, 415 Curie Boulevard, 415 Clinical Research Building, Philadelphia, Pennsylvania 19104, USA.,Department of Molecular Nephrology, Internal Medicine D, University Hospital Albert-Schweitzer-Straße 33, Münster 48149, Germany
| | - Grace Ragi
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, 415 Curie Boulevard, 415 Clinical Research Building, Philadelphia, Pennsylvania 19104, USA
| | - Shizheng Huang
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, 415 Curie Boulevard, 415 Clinical Research Building, Philadelphia, Pennsylvania 19104, USA
| | - Hermann Pavenstädt
- Department of Molecular Nephrology, Internal Medicine D, University Hospital Albert-Schweitzer-Straße 33, Münster 48149, Germany
| | - Katalin Susztak
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, 415 Curie Boulevard, 415 Clinical Research Building, Philadelphia, Pennsylvania 19104, USA
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221
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Helicobacter pylori upregulates Nanog and Oct4 via Wnt/β-catenin signaling pathway to promote cancer stem cell-like properties in human gastric cancer. Cancer Lett 2016; 374:292-303. [DOI: 10.1016/j.canlet.2016.02.032] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 02/06/2023]
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222
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Tropisetron suppresses colitis-associated cancer in a mouse model in the remission stage. Int Immunopharmacol 2016; 36:9-16. [PMID: 27104313 DOI: 10.1016/j.intimp.2016.04.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 04/10/2016] [Accepted: 04/12/2016] [Indexed: 02/07/2023]
Abstract
Patients with inflammatory bowel disease (IBD) have a high risk for development of colitis-associated cancer (CAC). Serotonin is a neurotransmitter produced by enterochromaffin cells of the intestine. Serotonin and its receptors, mainly 5-HT3 receptor, are overexpressed in IBD and promote development of CAC through production of inflammatory cytokines. In the present study, we demonstrated the in vivo activity of tropisetron, a 5-HT3 receptor antagonist, against experimental CAC. CAC was induced by azoxymethane (AOM)/dextran sodium sulfate (DDS) in BALB/c mice. The histopathology of colon tissue was performed. Beta-catenin and Cox-2 expression was evaluated by immunohistochemistry as well as quantitative reverse transcription-PCR (qRT-PCR). Alterations in the expression of 5-HT3 receptor and inflammatory-associated genes such as Il-1β, Tnf-α, Tlr4 and Myd88 were determined by qRT-PCR. Our results showed that tumor development in tropisetron-treated CAC group was significantly lower than the controls. The qRT-PCR analysis demonstrated that the expression of 5-HT3 receptor was significantly increased following CAC induction. In addition, tropisetron reduced expression of β-catenin and Cox-2 in the CAC experimental group. The levels of Il-1β, Tnf-α, Tlr4 and Myd88 were significantly decreased upon tropisetron treatment in the AOM/DSS group. Taken together, our data show that tropisetron inhibits development of CAC probably by attenuation of inflammatory reactions in the colitis.
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223
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JIA YUJIE, YUAN LIJUN, XU TINGTING, LI HANSHU, YANG GUANG, JIANG MIAONA, ZHANG CAIHUA, LI CONG. Herbal medicine Gan-fu-kang downregulates Wnt/Ca2+ signaling to attenuate liver fibrogenesis in vitro and in vivo. Mol Med Rep 2016; 13:4705-14. [DOI: 10.3892/mmr.2016.5148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 01/27/2016] [Indexed: 11/06/2022] Open
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224
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Wu G, Wilson G, George J, Liddle C, Hebbard L, Qiao L. Overcoming treatment resistance in cancer: Current understanding and tactics. Cancer Lett 2016; 387:69-76. [PMID: 27089987 DOI: 10.1016/j.canlet.2016.04.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/10/2016] [Accepted: 04/11/2016] [Indexed: 02/06/2023]
Abstract
Chemotherapy is the standard treatment for many, if not all, metastatic cancers. While chemotherapy is often capable of inducing cell death in tumors leading to shrinkage of the tumor bulk, many patients suffer from recurrence and ultimately death due to resistance. During the last decade, treatment resistance has attracted great attention followed by some seminal discoveries, including sequential mutations, cancer stem cells, and bidirectional inter-conversion of stem and non-stem cancer cell populations. Nevertheless, the successful treatment of cancer will require a considerable refinement of our knowledge concerning treatment resistance. In doing so, we expect that a more informed and refined approach to treat cancer will be developed and this may improve prognosis of cancer patients. In this review, we will discuss the current knowledge concerning the failure of cancer treatments and the potential approaches to overcome therapeutic resistance.
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Affiliation(s)
- Guang Wu
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
| | - George Wilson
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
| | - Jacob George
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
| | - Christopher Liddle
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia
| | - Lionel Hebbard
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia; Department of Molecular and Cell Biology, James Cook University, Townsville, QLD, Australia.
| | - Liang Qiao
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW 2145, Australia.
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225
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Zhang J, Tian XJ, Xing J. Signal Transduction Pathways of EMT Induced by TGF-β, SHH, and WNT and Their Crosstalks. J Clin Med 2016; 5:jcm5040041. [PMID: 27043642 PMCID: PMC4850464 DOI: 10.3390/jcm5040041] [Citation(s) in RCA: 232] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 01/31/2016] [Accepted: 03/21/2016] [Indexed: 12/12/2022] Open
Abstract
Epithelial-to-mesenchymal transition (EMT) is a key step in development, wound healing, and cancer development. It involves cooperation of signaling pathways, such as transformation growth factor-β (TGF-β), Sonic Hedgehog (SHH), and WNT pathways. These signaling pathways crosstalk to each other and converge to key transcription factors (e.g., SNAIL1) to initialize and maintain the process of EMT. The functional roles of multi-signaling pathway crosstalks in EMT are sophisticated and, thus, remain to be explored. In this review, we focused on three major signal transduction pathways that promote or regulate EMT in carcinoma. We discussed the network structures, and provided a brief overview of the current therapy strategies and drug development targeted to these three signal transduction pathways. Finally, we highlighted systems biology approaches that can accelerate the process of deconstructing complex networks and drug discovery.
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Affiliation(s)
- Jingyu Zhang
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Xiao-Jun Tian
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Jianhua Xing
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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226
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Yang Z, Balic A, Michon F, Juuri E, Thesleff I. Mesenchymal Wnt/β-Catenin Signaling Controls Epithelial Stem Cell Homeostasis in Teeth by Inhibiting the Antiapoptotic Effect of Fgf10. Stem Cells 2016; 33:1670-81. [PMID: 25693510 DOI: 10.1002/stem.1972] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 01/17/2015] [Indexed: 01/05/2023]
Abstract
Continuous growth of rodent incisors relies on epithelial stem cells (SCs) located in the SC niche called labial cervical loop (LaCL). Here, we found a population of apoptotic cells residing in a specific location of the LaCL in mouse incisor. Activated Caspase 3 and Caspase 9, expressed in this location colocalized in part with Lgr5 in putative SCs. The addition of Caspase inhibitors to incisors ex vivo resulted in concentration dependent thickening of LaCL. To examine the role of Wnt signaling in regulation of apoptosis, we exposed the LaCL of postnatal day 2 (P2) mouse incisor ex vivo to BIO, a known activator of Wnt/β-catenin signaling. This resulted in marked thinning of LaCL as well as enhanced apoptosis. We found that Wnt/β-catenin signaling was intensely induced by BIO in the mesenchyme surrounding the LaCL, but, unexpectedly, no β-catenin activity was detected in the LaCL epithelium either before or after BIO treatment. We discovered that the expression of Fgf10, an essential growth factor for incisor epithelial SCs, was dramatically downregulated in the mesenchyme around BIO-treated LaCL, and that exogenous Fgf10 could rescue the thinning of the LaCL caused by BIO. We conclude that the homeostasis of the epithelial SC population in the mouse incisor depends on a proper rate of apoptosis and that this apoptosis is controlled by signals from the mesenchyme surrounding the LaCL. Fgf10 is a key mesenchymal signal limiting apoptosis of incisor epithelial SCs and its expression is negatively regulated by Wnt/β-catenin. Stem Cells 2015;33:1670-1681.
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Affiliation(s)
- Zheqiong Yang
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland; Department of Pharmacology, Wuhan University School of Basic Medical Science, Wuhan, Hubei, People's Republic of China
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227
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Bertrand V. β-catenin-driven binary cell fate decisions in animal development. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2016; 5:377-88. [PMID: 26952169 PMCID: PMC5069452 DOI: 10.1002/wdev.228] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 12/06/2015] [Accepted: 12/29/2015] [Indexed: 02/05/2023]
Abstract
The Wnt/β‐catenin pathway plays key roles during animal development. In several species, β‐catenin is used in a reiterative manner to regulate cell fate diversification between daughter cells following division. This binary cell fate specification mechanism has been observed in animals that belong to very diverse phyla: the nematode Caenorhabditis elegans, the annelid Platynereis, and the ascidian Ciona. It may also play a role in the regulation of several stem cell lineages in vertebrates. While the molecular mechanism behind this binary cell fate switch is not fully understood, it appears that both secreted Wnt ligands and asymmetric cortical factors contribute to the generation of the difference in nuclear β‐catenin levels between daughter cells. β‐Catenin then cooperates with lineage specific transcription factors to induce the expression of novel sets of transcription factors at each round of divisions, thereby diversifying cell fate. WIREs Dev Biol 2016, 5:377–388. doi: 10.1002/wdev.228 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Vincent Bertrand
- Aix-Marseille Université, CNRS, Institut de Biologie du Développement de Marseille, Marseille, France
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228
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Magin CM, Alge DL, Anseth KS. Bio-inspired 3D microenvironments: a new dimension in tissue engineering. Biomed Mater 2016; 11:022001. [DOI: 10.1088/1748-6041/11/2/022001] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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229
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Chung LY, Tang SJ, Wu YC, Sun GH, Liu HY, Sun KH. Galectin-3 augments tumor initiating property and tumorigenicity of lung cancer through interaction with β-catenin. Oncotarget 2016; 6:4936-52. [PMID: 25669973 PMCID: PMC4467125 DOI: 10.18632/oncotarget.3210] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 12/25/2014] [Indexed: 01/06/2023] Open
Abstract
Cancer stem cells (CSCs) are comprised of a rare sub-population of cells in tumors that have been proposed to be responsible for high recurrence rates and resistance to chemotherapy. Galectins are highly expressed in cancers that correlate with the aggressiveness of tumors. Galectins may also promote the resistance of cancer cells to chemotherapy. However, the role of galectins in CSCs remains unknown. In this study, sphere formation was used to enrich H1299 human lung CSCs that had self-renewal ability, advanced tumorigenic potential, and that highly expressed stem/progenitor cell markers such as Oct4, Sox2, Nanog, and CD133. A novel candidate molecule, galectin-3, for stemness was found in lung CSCs. The expression of galectin-3 robustly increased in lung cancer spheres over serial passages, but its suppression in the H1299 monolayer or spheres resulted in reduced expression of stemness-related genes, sphere-forming ability, tumorigenicity, chemoresistance, and tumor initiation in mice. Notably, the overexpression of galectin-3 in A549 lung cancer cells, which have low capability to grow as tumor spheres, promoted CSC formation. β-catenin activity was increased in H1299 spheres and counteracted by galectin-3 suppression. Thus, galectin-3 may act as a cofactor by interacting with β-catenin to augment the transcriptional activities of stemness-related genes. Furthermore, galectin-3 expression correlated with tumor progression and expressions of β-catenin and CSC marker CD133 in lung cancer tissues. Targeting galectin-3 signaling may provide a new strategy for lung cancer treatment by inhibiting stem-like properties.
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Affiliation(s)
- Ling-Yen Chung
- Department of Biotechnology and Laboratory Science in Medicine, and Immunity and Inflammation Research Center, National Yang-Ming University, Taipei, Taiwan, ROC.,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan, ROC
| | - Shye-Jye Tang
- Institute of Marine Biotechnology, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Yi-Ching Wu
- Department of Biotechnology and Laboratory Science in Medicine, and Immunity and Inflammation Research Center, National Yang-Ming University, Taipei, Taiwan, ROC.,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan, ROC
| | - Guang-Huan Sun
- Division of Urology, Department of Surgery, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan, ROC
| | - Huan-Yun Liu
- Division of Urology Surgery, Department of Surgery, Taoyuan Armed Forces General Hospital, Taoyuan, Taiwan, ROC
| | - Kuang-Hui Sun
- Department of Biotechnology and Laboratory Science in Medicine, and Immunity and Inflammation Research Center, National Yang-Ming University, Taipei, Taiwan, ROC.,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan, ROC
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230
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Ahmad R, Dhawan P, Singh AB. Cancer Stem Cell and Gastrointestinal Cancer: Current Status, Targeted Therapy and Future Implications. ACTA ACUST UNITED AC 2016; 5. [PMID: 31656694 PMCID: PMC6814166 DOI: 10.4172/2167-0501.1000202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The cancer stem cells (CSCs) are biologically distinct subset of rare cancer cells with inherent ability of self-renewal, de-differentiation, and capacity to initiate and maintain malignant tumor growth. Studies have further reported that CSCs prime cancer recurrence and therapy resistance. Therefore, targeting CSCs to inhibit cancer progression has become an attractive anti-cancer therapeutical strategy. Recent technical advances have provided a greater appreciation of the multistep nature of the oncogenesis and also clarified that CSC concept is not universally applicable. Irrespective, the role of the CSCs in gastrointestinal (GI) cancers, responsible for the most cancer-associated death, has been widely accepted and appreciated. However, despite the tremendous progress made in the last decade in developing markers to identify CSCs, and assays to assess tumorigenic function of CSCs, it remains an area of active investigation. In current article, we review findings related to the role and identification of CSCs in GI-cancers and discuss the crucial pathways involved in regulating CSCs populations’ development and drug resistance, and use of the tumoroid culture to test novel CSCs-targeted cancer therapies.
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Affiliation(s)
- Rizwan Ahmad
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, USA
| | - Punita Dhawan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, USA.,Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.,VA Nebraska- Western Iowa Health Care System, Omaha, NE, USA
| | - Amar B Singh
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, USA.,Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.,VA Nebraska- Western Iowa Health Care System, Omaha, NE, USA
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231
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Chimge NO, Little GH, Baniwal SK, Adisetiyo H, Xie Y, Zhang T, O'Laughlin A, Liu ZY, Ulrich P, Martin A, Mhawech-Fauceglia P, Ellis MJ, Tripathy D, Groshen S, Liang C, Li Z, Schones DE, Frenkel B. RUNX1 prevents oestrogen-mediated AXIN1 suppression and β-catenin activation in ER-positive breast cancer. Nat Commun 2016; 7:10751. [PMID: 26916619 PMCID: PMC4773428 DOI: 10.1038/ncomms10751] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 01/11/2016] [Indexed: 12/21/2022] Open
Abstract
Recent high-throughput studies revealed recurrent RUNX1 mutations in breast cancer, specifically in oestrogen receptor-positive (ER+) tumours. However, mechanisms underlying the implied RUNX1-mediated tumour suppression remain elusive. Here, by depleting mammary epithelial cells of RUNX1 in vivo and in vitro, we demonstrate combinatorial regulation of AXIN1 by RUNX1 and oestrogen. RUNX1 and ER occupy adjacent elements in AXIN1's second intron, and RUNX1 antagonizes oestrogen-mediated AXIN1 suppression. Accordingly, RNA-seq and immunohistochemical analyses demonstrate an ER-dependent correlation between RUNX1 and AXIN1 in tumour biopsies. RUNX1 loss in ER+ mammary epithelial cells increases β-catenin, deregulates mitosis and stimulates cell proliferation and expression of stem cell markers. However, it does not stimulate LEF/TCF, c-Myc or CCND1, and it does not accelerate G1/S cell cycle phase transition. Finally, RUNX1 loss-mediated deregulation of β-catenin and mitosis is ameliorated by AXIN1 stabilization in vitro, highlighting AXIN1 as a potential target for the management of ER+ breast cancer. The tumour suppressor RUNX1 is often lost or mutated in oestrogen receptor-positive breast cancers. In this study, the authors demonstrate that the loss of RUNX1 unleashes oestrogen-mediated inhibition of AXIN1, a negative regulator of β-catenin, resulting in β-catenin signalling-mediated cancer cell proliferation and mitosis deregulation.
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Affiliation(s)
- Nyam-Osor Chimge
- Department of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.,Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Gillian H Little
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Sanjeev K Baniwal
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Helty Adisetiyo
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Ying Xie
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Tian Zhang
- Department of Molecular Microbiology and Immunology, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Andie O'Laughlin
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Zhi Y Liu
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Peaches Ulrich
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Anthony Martin
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Paulette Mhawech-Fauceglia
- Department of Pathology, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Matthew J Ellis
- Smith Breast Center, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Debu Tripathy
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Susan Groshen
- Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.,USC/Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Chengyu Liang
- Department of Molecular Microbiology and Immunology, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
| | - Zhe Li
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Dustin E Schones
- Department of Diabetes Complications and Metabolism, Beckman Research Institute, City of Hope, Duarte, California 91010, USA
| | - Baruch Frenkel
- Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.,USC/Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.,Department of Orthopedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.,Department of Biochemistry and Molecular Biology, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA
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232
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Bosada FM, Devasthali V, Jones KA, Stankunas K. Wnt/β-catenin signaling enables developmental transitions during valvulogenesis. Development 2016; 143:1041-54. [PMID: 26893350 DOI: 10.1242/dev.130575] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 01/31/2016] [Indexed: 01/12/2023]
Abstract
Heart valve development proceeds through coordinated steps by which endocardial cushions (ECs) form thin, elongated and stratified valves. Wnt signaling and its canonical effector β-catenin are proposed to contribute to endocardial-to-mesenchymal transformation (EMT) through postnatal steps of valvulogenesis. However, genetic redundancy and lethality have made it challenging to define specific roles of the canonical Wnt pathway at different stages of valve formation. We developed a transgenic mouse system that provides spatiotemporal inhibition of Wnt/β-catenin signaling by chemically inducible overexpression of Dkk1. Unexpectedly, this approach indicates canonical Wnt signaling is required for EMT in the proximal outflow tract (pOFT) but not atrioventricular canal (AVC) cushions. Furthermore, Wnt indirectly promotes pOFT EMT through its earlier activity in neighboring myocardial cells or their progenitors. Subsequently, Wnt/β-catenin signaling is activated in cushion mesenchymal cells where it supports FGF-driven expansion of ECs and then AVC valve extracellular matrix patterning. Mice lacking Axin2, a negative Wnt regulator, have larger valves, suggesting that accumulating Axin2 in maturing valves represents negative feedback that restrains tissue overgrowth rather than simply reporting Wnt activity. Disruption of these Wnt/β-catenin signaling roles that enable developmental transitions during valvulogenesis could account for common congenital valve defects.
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Affiliation(s)
- Fernanda M Bosada
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA Department of Biology, University of Oregon, Eugene, OR 97403-1229, USA
| | - Vidusha Devasthali
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA
| | - Kimberly A Jones
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA Department of Biology, University of Oregon, Eugene, OR 97403-1229, USA
| | - Kryn Stankunas
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA Department of Biology, University of Oregon, Eugene, OR 97403-1229, USA
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233
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Xu C, Shen J, Liao B, Fu H, Zhou H, Qi Y, Huangfu Z, Chen Y, Chen J. [Promoter methylation status of SFRP genes and induced apoptosis by demethylation in Jurkat cells]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2016; 37:51-5. [PMID: 26876254 PMCID: PMC7342293 DOI: 10.3760/cma.j.issn.0253-2727.2016.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
目的 探讨人T淋巴细胞白血病(T-ALL)细胞株Jurkat细胞分泌性卷曲相关蛋白(SFRP)基因甲基化及去甲基化诱导细胞凋亡对Wnt/β-catenin信号通路的影响。 方法 以不同浓度(1.0、2.0、4.0 µmol/L)5-杂氮-2′-脱氧胞苷(5-Aza-CdR)对Jurkat细胞进行去甲基化处理,采用MTT法观察5-Aza-CdR对Jurkat细胞增殖的抑制作用,流式细胞术检测细胞凋亡率,甲基化特异性PCR(MSP)法检测药物处理前后SFRP基因的甲基化状态,实时荧光定量PCR检测SFRP基因以及RT-PCR检测survivin、c-myc和cyclin D1基因mRNA的表达改变,Western blot鉴定处理前后β-catenin的蛋白表达。 结果 1.0、2.0、4.0 µmol/L 5-Aza-CdR对Jurkat细胞的增殖有明显抑制作用,呈时间-剂量依赖性(P<0.05);流式细胞术检测显示5-Aza-CdR作用Jurkat细胞48 h后,不同浓度5-Aza-CdR处理组与对照组比较细胞早期凋亡率明显升高(P<0.05);SFRP1、SFRP2、SFRP4、SFRP5基因甲基化水平随5-Aza-CdR浓度升高而下降,呈剂量依赖性(P<0.05),同时mRNA表达水平较对照组明显上调(P<0.05);Jurkat细胞总蛋白中β-catenin的蛋白表达随5-Aza-CdR浓度的升高而逐渐下降,呈剂量依赖性(P<0.05);凋亡相关基因survivin、c-myc和cyclin D1的mRNA表达随5-Aza-CdR浓度的增高而降低,呈剂量依赖性(P<0.05)。 结论 逆转Jurkat细胞SFRP基因的甲基化,可以恢复SFRP基因转录表达,通过阻断β-catenin蛋白抑制Wnt/β-catenin信号通路的激活而诱导细胞凋亡。
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Affiliation(s)
- Chengbo Xu
- Department of Hematology, the Affiliated People's Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou 350004, China
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234
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Ma ZG, Lv XD, Zhan LL, Chen L, Zou QY, Xiang JQ, Qin JL, Zhang WW, Zeng ZJ, Jin H, Jiang HX, Lv XP. Human urokinase-type plasminogen activator gene-modified bone marrow-derived mesenchymal stem cells attenuate liver fibrosis in rats by down-regulating the Wnt signaling pathway. World J Gastroenterol 2016; 22:2092-2103. [PMID: 26877613 PMCID: PMC4726681 DOI: 10.3748/wjg.v22.i6.2092] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Revised: 09/27/2015] [Accepted: 11/24/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the therapeutic effects of bone marrow-derived mesenchymal stem cells (BMSCs) with human urokinase-type plasminogen activator (uPA) on liver fibrosis, and to investigate the mechanism of gene therapy.
METHODS: BMSCs transfected with adenovirus-mediated human urokinase plasminogen activator (Ad-uPA) were transplanted into rats with CCl4-induced liver fibrosis. All rats were sacrificed after 8 wk, and their serum and liver tissue were collected for biochemical, histopathologic, and molecular analyzes. The degree of liver fibrosis was assessed by hematoxylin and eosin or Masson’s staining. Western blot and quantitative reverse transcription-polymerase chain reaction were used to determine protein and mRNA expression levels.
RESULTS: Serum levels of alanine aminotransferase, aminotransferase, total bilirubin, hyaluronic acid, laminin, and procollagen type III were markedly decreased, whereas the levels of serum albumin were increased by uPA gene modified BMSCs treatment. Histopathology revealed that chronic CCl4-treatment resulted in significant fibrosis while uPA gene modified BMSCs treatment significantly reversed fibrosis. By quantitatively analysing the fibrosis area of liver tissue using Masson staining in different groups of animals, we found that model animals with CCl4-induced liver fibrosis had the largest fibrotic area (16.69% ± 1.30%), while fibrotic area was significantly decreased by BMSCs treatment (12.38% ± 2.27%) and was further reduced by uPA-BMSCs treatment (8.31% ± 1.21%). Both protein and mRNA expression of β-catenin, Wnt4 and Wnt5a was down-regulated in liver tissues following uPA gene modified BMSCs treatment when compared with the model animals.
CONCLUSION: Transplantation of uPA gene modified BMSCs suppressed liver fibrosis and ameliorated liver function and may be a new approach to treating liver fibrosis. Furthermore, treatment with uPA gene modified BMSCs also resulted in a decrease in expression of molecules of the Wnt signaling pathway.
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235
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Boo L, Ho WY, Ali NM, Yeap SK, Ky H, Chan KG, Yin WF, Satharasinghe DA, Liew WC, Tan SW, Ong HK, Cheong SK. MiRNA Transcriptome Profiling of Spheroid-Enriched Cells with Cancer Stem Cell Properties in Human Breast MCF-7 Cell Line. Int J Biol Sci 2016; 12:427-45. [PMID: 27019627 PMCID: PMC4807162 DOI: 10.7150/ijbs.12777] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 12/13/2015] [Indexed: 01/06/2023] Open
Abstract
Breast cancer is the second leading cause of cancer-related mortality worldwide as most patients often suffer cancer relapse. The reason is often attributed to the presence of cancer stem cells (CSCs). Recent studies revealed that dysregulation of microRNA (miRNA) are closely linked to breast cancer recurrence and metastasis. However, no specific study has comprehensively characterised the CSC characteristic and miRNA transcriptome in spheroid-enriched breast cells. This study described the generation of spheroid MCF-7 cell in serum-free condition and the comprehensive characterisation for their CSC properties. Subsequently, miRNA expression differences between the spheroid-enriched CSC cells and their parental cells were evaluated using next generation sequencing (NGS). Our results showed that the MCF-7 spheroid cells were enriched with CSCs properties, indicated by the ability to self-renew, increased expression of CSCs markers, and increased resistance to chemotherapeutic drugs. Additionally, spheroid-enriched CSCs possessed greater cell proliferation, migration, invasion, and wound healing ability. A total of 134 significantly (p<0.05) differentially expressed miRNAs were identified between spheroids and parental cells using miRNA-NGS. MiRNA-NGS analysis revealed 25 up-regulated and 109 down-regulated miRNAs which includes some miRNAs previously reported in the regulation of breast CSCs. A number of miRNAs (miR-4492, miR-4532, miR-381, miR-4508, miR-4448, miR-1296, and miR-365a) which have not been previously reported in breast cancer were found to show potential association with breast cancer chemoresistance and self-renewal capability. The gene ontology (GO) analysis showed that the predicted genes were enriched in the regulation of metabolic processes, gene expression, DNA binding, and hormone receptor binding. The corresponding pathway analyses inferred from the GO results were closely related to the function of signalling pathway, self-renewability, chemoresistance, tumorigenesis, cytoskeletal proteins, and metastasis in breast cancer. Based on these results, we proposed that certain miRNAs identified in this study could be used as new potential biomarkers for breast cancer stem cell diagnosis and targeted therapy.
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Affiliation(s)
- Lily Boo
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Wan Yong Ho
- 2. Faculty of Medicine and Health Sciences, University of Nottingham (Malaysia Campus), 43500 Semenyih, Malaysia
| | - Norlaily Mohd Ali
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Swee Keong Yeap
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Huynh Ky
- 4. Department of Agriculture Genetics and Breeding, College of Agriculture and Applied Biology, Cantho University, 84071, Vietnam
| | - Kok Gan Chan
- 5. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Wai Fong Yin
- 5. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Dilan Amila Satharasinghe
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia.; 6. Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, 20400, Sri Lanka
| | - Woan Charn Liew
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Sheau Wei Tan
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Han Kiat Ong
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Soon Keng Cheong
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia;; 7. Cryocord Sdn Bhd, Persiaran Cyberpoint Selatan, 63000 Cyberjaya, Malaysia
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Fate decision of mesenchymal stem cells: adipocytes or osteoblasts? Cell Death Differ 2016; 23:1128-39. [PMID: 26868907 PMCID: PMC4946886 DOI: 10.1038/cdd.2015.168] [Citation(s) in RCA: 771] [Impact Index Per Article: 96.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 11/03/2015] [Accepted: 12/01/2015] [Indexed: 12/18/2022] Open
Abstract
Mesenchymal stem cells (MSCs), a non-hematopoietic stem cell population first discovered in bone marrow, are multipotent cells capable of differentiating into mature cells of several mesenchymal tissues, such as fat and bone. As common progenitor cells of adipocytes and osteoblasts, MSCs are delicately balanced for their differentiation commitment. Numerous in vitro investigations have demonstrated that fat-induction factors inhibit osteogenesis, and, conversely, bone-induction factors hinder adipogenesis. In fact, a variety of external cues contribute to the delicate balance of adipo-osteogenic differentiation of MSCs, including chemical, physical, and biological factors. These factors trigger different signaling pathways and activate various transcription factors that guide MSCs to commit to either lineage. The dysregulation of the adipo-osteogenic balance has been linked to several pathophysiologic processes, such as aging, obesity, osteopenia, osteopetrosis, and osteoporosis. Thus, the regulation of MSC differentiation has increasingly attracted great attention in recent years. Here, we review external factors and their signaling processes dictating the reciprocal regulation between adipocytes and osteoblasts during MSC differentiation and the ultimate control of the adipo-osteogenic balance.
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237
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Chen C, Xue Y, Zhang D, Xu W, Xu H, Yao H, Pei D, Gu Y. Short hairpin RNA silencing of TGF-βRII and FZD-7 synergistically suppresses proliferation and metastasis of hepatocellular carcinoma cells. Oncol Lett 2016; 11:2039-2046. [PMID: 26998118 PMCID: PMC4774445 DOI: 10.3892/ol.2016.4208] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 12/17/2015] [Indexed: 11/06/2022] Open
Abstract
Transforming growth factor-β (TGF-β) is a multifunctional regulator of cell growth, apoptosis, differentiation and migration. The Wnt/β-catenin signaling pathway has been implicated in a wide spectrum of diseases, including numerous cancers and degenerative disease. The aim of the present study was to investigate if simultaneous blocking of TGF-β and Wnt/β-catenin signaling pathways exerts synergistic anti-tumor effects on hepatocellular carcinoma (HCC) cells. Short hairpin (sh) RNA eukaryotic expression vectors, specific to TGF-β receptor II (RII) and Frizzled receptor (FZD)-7, were constructed by gene recombination. The expression vectors were transfected into human HCC HepG2 and Huh-7 cells using Lipofectamine 2000 to investigate the synergistic effects between TGF-β and Wnt/β-catenin signaling pathways on HCC cell proliferation, invasion and migration and the cell-cycle distribution. Western blot analysis was used to identify the expression of β-catenin, c-Myc and cyclin D1 in transfected cells to investigate the underlying mechanisms that cause TGF-β and Wnt/β-catenin signaling in HCC cells. shTGF-βRII-c and shFZD-7-2 were selected as the most efficient plasmids. A cell growth assay and colony-forming assay consistently demonstrated that the proliferative activity of the co-transfected group was significantly decreased compared to the single-transfected group. A wound healing invasion and migration assay demonstrated that co-transfection of shTGF-βRII-c and shFZD-7-2 decreased the invasion and migration abilities of the cells compared with either single-transfected group. In addition, the present study demonstrated that the observed reduction in cell proliferation was due to the cells arresting at the G1 phase of the cell cycle, and the downregulation of β-catenin, c-Myc and cyclin D1 impaired the proliferative and invasive abilities of the HCC cells. The present results demonstrate that simultaneous blocking of TGF-β and Wnt/β-catenin signaling by targeting TGF-βRII and FZD-7 may inhibit the proliferation and metastasis of HCC cells more effectively compared with blocking either the TGF-β or Wnt/β-catenin pathway.
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Affiliation(s)
- Cong Chen
- Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Yuyang Xue
- Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Dejun Zhang
- Department of Oncology, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Wei Xu
- Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Hao Xu
- Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Hong Yao
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Dongsheng Pei
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
| | - Yuming Gu
- Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, P.R. China
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238
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Chemically Induced Reprogramming of Somatic Cells to Pluripotent Stem Cells and Neural Cells. Int J Mol Sci 2016; 17:226. [PMID: 26861316 PMCID: PMC4783958 DOI: 10.3390/ijms17020226] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/01/2016] [Indexed: 12/31/2022] Open
Abstract
The ability to generate transplantable neural cells in a large quantity in the laboratory is a critical step in the field of developing stem cell regenerative medicine for neural repair. During the last few years, groundbreaking studies have shown that cell fate of adult somatic cells can be reprogrammed through lineage specific expression of transcription factors (TFs)-and defined culture conditions. This key concept has been used to identify a number of potent small molecules that could enhance the efficiency of reprogramming with TFs. Recently, a growing number of studies have shown that small molecules targeting specific epigenetic and signaling pathways can replace all of the reprogramming TFs. Here, we provide a detailed review of the studies reporting the generation of chemically induced pluripotent stem cells (ciPSCs), neural stem cells (ciNSCs), and neurons (ciN). We also discuss the main mechanisms of actions and the pathways that the small molecules regulate during chemical reprogramming.
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239
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Zhang J, Liu J, Li H, Wang J. β-Catenin signaling pathway regulates cisplatin resistance in lung adenocarcinoma cells by upregulating Bcl-xl. Mol Med Rep 2016; 13:2543-51. [PMID: 26860078 PMCID: PMC4768989 DOI: 10.3892/mmr.2016.4882] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 01/06/2016] [Indexed: 11/12/2022] Open
Abstract
The Wnt/β-catenin signaling pathway has been reported to regulate cisplatin resistance in several types of cancer cell. The present study aimed to investigate the role and underlying mechanism of Wnt/β-catenin signaling in cisplatin resistance of lung adenocarcinoma cells. Wild-type and cisplatin-resistant A549 human lung adenocarcinoma cells (A549/WT and A549/CDDP, respectively) were cultured in vitro and exposed to different cisplatin concentrations. Cells were incubated with 10 mM lithium chloride (LiCl) to activate β-catenin signaling. Cell proliferation was determined using the MTS assay. Cell apoptosis was evaluated using Annexin V/propidium iodide double staining, followed by flow cytometry. β-catenin was knocked down using small interfering RNA (siRNA). The intracellular distribution of β-catenin was determined by immunocytochemistry, and the mRNA and protein expressions of target genes were examined by reverse transcription-quantitative polymerase chain reaction and western zblotting, respectively. β-catenin and B-cell lymphoma-extra large (Bcl-xl) were significantly upregulated in A549/CDDP cells compared with A549/WT cells (P<0.05). LiCl reduced the sensitivity of A549/WT cells to cisplatin (P<0.01); and upregulated, increased phosphorylation (P<0.05) and enhanced nuclear translocation of β-catenin. LiCl also significantly elevated the mRNA and protein expression levels of Bcl-xl (P<0.05). Notably, silencing of β-catenin with siRNA decreased the mRNA and protein expression of Bcl-xl, and sensitized A549/WT cells to cisplatin (P<0.01). The findings of the current study suggest that upregulation of β-catenin signaling may contribute to cisplatin resistance in lung adenocarcinoma cells by upregulating Bcl-xl. Therefore, molecular targeting of Wnt/β-catenin signaling may sensitize lung cancer cells to cisplatin.
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Affiliation(s)
- Jin Zhang
- Department of Surgical Intensive Care Unit, Beijing Chao‑Yang Hospital, Capital Medical University, Beijing 100020, P.R. China
| | - Jie Liu
- Department of Physiology, Capital Medical University, Beijing 100069, P.R. China
| | - Hui Li
- Department of Thoracic Surgery, Beijing Chao‑Yang Hospital, Capital Medical University, Beijing 100020, P.R. China
| | - Jun Wang
- Department of Physiology, Capital Medical University, Beijing 100069, P.R. China
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240
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Lichtenberger BM, Mastrogiannaki M, Watt FM. Epidermal β-catenin activation remodels the dermis via paracrine signalling to distinct fibroblast lineages. Nat Commun 2016; 7:10537. [PMID: 26837596 PMCID: PMC4742837 DOI: 10.1038/ncomms10537] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 12/23/2015] [Indexed: 01/06/2023] Open
Abstract
Sustained epidermal Wnt/β-catenin signalling expands the stem cell compartment and induces ectopic hair follicles (EFs). This is accompanied by extensive fibroblast proliferation and extracellular matrix (ECM) remodelling in the underlying dermis. Here we show that epidermal Hedgehog (Hh) and Transforming growth factor-beta (TGF-β) signalling mediate the dermal changes. Pharmacological inhibition or genetic deletion of these pathways prevents β-catenin-induced dermal reprogramming and EF formation. Epidermal Shh stimulates proliferation of the papillary fibroblast lineage, whereas TGF-β2 controls proliferation, differentiation and ECM production by reticular fibroblasts. Hh inhibitors do not affect TGF-β target gene expression in reticular fibroblasts, and TGF-β inhibition does not prevent Hh target gene induction in papillary fibroblasts. However, when Hh signalling is inhibited the reticular dermis does not respond to epidermal β-catenin activation. We conclude that the dermal response to epidermal Wnt/β-catenin signalling depends on distinct fibroblast lineages responding to different paracrine signals. The molecular mechanisms regulating skin dermal changes are unclear. Here, the authors show that deletion of Hedgehog (Hh) in the upper dermis alters the response to epidermal Wnt signalling, which, together with changes in extracellular matrix production, influences distinct fibroblast lineages differently.
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Affiliation(s)
- Beate M Lichtenberger
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK.,Wellcome Trust Centre for Stem Cell Research, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Maria Mastrogiannaki
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
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241
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WNT signaling in glioblastoma and therapeutic opportunities. J Transl Med 2016; 96:137-50. [PMID: 26641068 DOI: 10.1038/labinvest.2015.140] [Citation(s) in RCA: 171] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 09/19/2015] [Accepted: 10/06/2015] [Indexed: 12/20/2022] Open
Abstract
WNTs and their downstream effectors regulate proliferation, death, and migration and cell fate decision. Deregulation of WNT signaling is associated with various cancers including GBM, which is the most malignant primary brain cancer. In this review, we will summarize the experimental evidence supporting oncogenic roles of WNT signaling in GBM and discuss current progress in the targeting of WNT signaling as an anti-cancer approach. In particular, we will focus on (1) genetic and epigenetic alterations that lead to aberrant WNT pathway activation in GBM, (2) WNT-mediated control of GBM stem cell maintenance and invasion, and (3) cross-talk between WNT and other signaling pathways in GBM. We will then review the discovery of agents that can inhibit WNT signaling in preclinical models and the current status of human clinical trials.
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242
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Thomas PD, Kahn M. Kat3 coactivators in somatic stem cells and cancer stem cells: biological roles, evolution, and pharmacologic manipulation. Cell Biol Toxicol 2016; 32:61-81. [PMID: 27008332 PMCID: PMC7458431 DOI: 10.1007/s10565-016-9318-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/15/2016] [Indexed: 12/18/2022]
Abstract
Long-lived somatic stem cells regenerate adult tissues throughout our lifetime. However, with aging, there is a significant deterioration in the function of stem and progenitor cells, which contribute to diseases of aging. The decision for a long-lived somatic stem cell to become activated and subsequently to undergo either a symmetric or an asymmetric division is a critical cellular decision process. The decision to preferentially divide symmetrically or asymmetrically may be the major fundamental intrinsic difference between normal somatic stem cells and cancer stem cells. Based upon work done primarily in our laboratory over the past 15 years, this article provides a perspective on the critical role of somatic stem cells in aging. In particular, we discuss the importance of symmetric versus asymmetric divisions in somatic stem cells and the role of the differential usage of the highly similar Kat3 coactivators, CREB-binding protein (CBP) and p300, in stem cells. We describe and propose a more complete model for the biological mechanism and roles of these two coactivators, their evolution, and unique roles and importance in stem cell biology. Finally, we discuss the potential to pharmacologically manipulate Kat3 coactivator interactions in endogenous stem cells (both normal and cancer stem cells) to potentially ameliorate the aging process and common diseases of aging.
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Affiliation(s)
- Paul D Thomas
- Division of Bioinformatics, Department of Preventive Medicine, USC Norris Comprehensive Cancer Center, 1450 Biggy Street, NRT 2501, Los Angeles, CA, 90033, USA
| | - Michael Kahn
- USC Center for Molecular Pathways and Drug Discovery, USC Norris Comprehensive Cancer Center, 1450 Biggy Street, NRT 4501, Los Angeles, CA, 90033, USA.
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243
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ROS-induced endothelial stress contributes to pulmonary fibrosis through pericytes and Wnt signaling. J Transl Med 2016; 96:206-17. [PMID: 26367492 DOI: 10.1038/labinvest.2015.100] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 05/05/2015] [Indexed: 12/15/2022] Open
Abstract
Pulmonary fibrosis is a grave diagnosis with insidious progression, generally considered as a consequence of aberrant epithelial wound healing and excessive scarring. This process is commonly modeled in animals by local bleomycin administration, resulting in peribronchial inflammation and subsequent fibrosis. We have previously described initiation and early development of distal pulmonary fibrosis following repeated subcutaneous bleomycin injections (systemic administration). The aim of this study was to identify mechanisms for the development of pulmonary fibrosis, which we hypothesize is related to endothelial stress and activation. Bleomycin was administered subcutaneously 3 times/week during 0.33-4w, and parenchymal alterations were studied. In addition, we used microvascular endothelial cells to investigate effects of bleomycin in vitro. Our results confirmed that systemic administration of bleomycin exerts oxidative stress indicated by an increase in Sod1 at 0.33, 1, and 4w (P<0.05). Endothelial cells were activated (increased CD106 expression) from 1w and onwards (P<0.05), and p21 expression was increased 2-3 times throughout the study (P<0.05) as were the number of β-catenin-positive nuclei (P<0.001). Wnt3a was increased at 0.33, 1, and 4w (P<0.01) and Wnt5a from 1w and onwards (P<0.001). The present study suggests that bleomycin-induced reactive oxygen species (ROS) causes DNA stress affecting the endothelial niche, initiating repair processes including Wnt signaling. The repeated systemic administrations disrupt a normally fine-tuned balance in the Wnt signaling. In addition, pericyte differentiation was affected, which may have significant effects on fibrosis due to their ability to differentiate into myofibroblasts. We conclude that the endothelial niche may have an important role in the development of pulmonary fibrosis and warrants further investigations.
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244
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Yang K, Wang X, Zhang H, Wang Z, Nan G, Li Y, Zhang F, Mohammed MK, Haydon RC, Luu HH, Bi Y, He TC. The evolving roles of canonical WNT signaling in stem cells and tumorigenesis: implications in targeted cancer therapies. J Transl Med 2016; 96:116-36. [PMID: 26618721 PMCID: PMC4731283 DOI: 10.1038/labinvest.2015.144] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 10/06/2015] [Indexed: 02/07/2023] Open
Abstract
The canonical WNT/β-catenin signaling pathway governs a myriad of biological processes underlying the development and maintenance of adult tissue homeostasis, including regulation of stem cell self-renewal, cell proliferation, differentiation, and apoptosis. WNTs are secreted lipid-modified glycoproteins that act as short-range ligands to activate receptor-mediated signaling pathways. The hallmark of the canonical pathway is the activation of β-catenin-mediated transcriptional activity. Canonical WNTs control the β-catenin dynamics as the cytoplasmic level of β-catenin is tightly regulated via phosphorylation by the 'destruction complex', consisting of glycogen synthase kinase 3β (GSK3β), casein kinase 1α (CK1α), the scaffold protein AXIN, and the tumor suppressor adenomatous polyposis coli (APC). Aberrant regulation of this signaling cascade is associated with varieties of human diseases, especially cancers. Over the past decade, significant progress has been made in understanding the mechanisms of canonical WNT signaling. In this review, we focus on the current understanding of WNT signaling at the extracellular, cytoplasmic membrane, and intracellular/nuclear levels, including the emerging knowledge of cross-talk with other pathways. Recent progresses in developing novel WNT pathway-targeted therapies will also be reviewed. Thus, this review is intended to serve as a refresher of the current understanding about the physiologic and pathogenic roles of WNT/β-catenin signaling pathway, and to outline potential therapeutic opportunities by targeting the canonical WNT pathway.
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Affiliation(s)
- Ke Yang
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Xin Wang
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA, Department of Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Hongmei Zhang
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA, Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, and the Affiliated Hospital of Stomatology of Chongqing Medical University, Chongqing, China
| | - Zhongliang Wang
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Guoxin Nan
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Yasha Li
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Fugui Zhang
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA, Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, and the Affiliated Hospital of Stomatology of Chongqing Medical University, Chongqing, China
| | - Maryam K. Mohammed
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Rex C. Haydon
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Hue H. Luu
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Yang Bi
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA, Corresponding authors T.-C. He, MD, PhD, Molecular Oncology Laboratory, The University of Chicago Medical Center, 5841 South Maryland Avenue, MC 3079, Chicago, IL 60637, USA, Tel. (773) 702-7169; Fax (773) 834-4598, , Yang Bi, MD, PhD, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University, Chongqing 400046, China, Tel. 011-86-23-63633113; Fax: 011-86-236362690,
| | - Tong-Chuan He
- Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University; Chongqing, China, Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA, Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, and the Affiliated Hospital of Stomatology of Chongqing Medical University, Chongqing, China, Corresponding authors T.-C. He, MD, PhD, Molecular Oncology Laboratory, The University of Chicago Medical Center, 5841 South Maryland Avenue, MC 3079, Chicago, IL 60637, USA, Tel. (773) 702-7169; Fax (773) 834-4598, , Yang Bi, MD, PhD, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, The Children's Hospital, Chongqing Medical University, Chongqing 400046, China, Tel. 011-86-23-63633113; Fax: 011-86-236362690,
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245
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Shin HR, Islam R, Yoon WJ, Lee T, Cho YD, Bae HS, Kim BS, Woo KM, Baek JH, Ryoo HM. Pin1-mediated Modification Prolongs the Nuclear Retention of β-Catenin in Wnt3a-induced Osteoblast Differentiation. J Biol Chem 2016; 291:5555-5565. [PMID: 26740630 DOI: 10.1074/jbc.m115.698563] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 11/06/2022] Open
Abstract
The canonical Wnt signaling pathway, in which β-catenin nuclear localization is a crucial step, plays an important role in osteoblast differentiation. Pin1, a prolyl isomerase, is also known as a key enzyme in osteogenesis. However, the role of Pin1 in canonical Wnt signal-induced osteoblast differentiation is poorly understood. We found that Pin1 deficiency caused osteopenia and reduction of β-catenin in bone lining cells. Similarly, Pin1 knockdown or treatment with Pin1 inhibitors strongly decreased the nuclear β-catenin level, TOP flash activity, and expression of bone marker genes induced by canonical Wnt activation and vice versa in Pin1 overexpression. Pin1 interacts directly with and isomerizes β-catenin in the nucleus. The isomerized β-catenin could not bind to nuclear adenomatous polyposis coli, which drives β-catenin out of the nucleus for proteasomal degradation, which consequently increases the retention of β-catenin in the nucleus and might explain the decrease of β-catenin ubiquitination. These results indicate that Pin1 could be a critical target to modulate β-catenin-mediated osteogenesis.
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Affiliation(s)
- Hye-Rim Shin
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Rabia Islam
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Won-Joon Yoon
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Taegyung Lee
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Young-Dan Cho
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and; Periodontology, School of Dentistry, Seoul National University, Seoul, 110-749, Korea
| | - Han-Sol Bae
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Bong-Su Kim
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Kyung-Mi Woo
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Jeong-Hwa Baek
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and
| | - Hyun-Mo Ryoo
- From the Departments of Molecular Genetics, School of Dentistry and Dental Research Institute, BK21 Program, and.
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246
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Wnt inhibition is dysregulated in gliomas and its re-establishment inhibits proliferation and tumor sphere formation. Exp Cell Res 2015; 340:53-61. [PMID: 26712519 DOI: 10.1016/j.yexcr.2015.12.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 10/19/2015] [Accepted: 12/16/2015] [Indexed: 02/06/2023]
Abstract
Evidence indicates that the growth of glioblastoma (GBM), the most common and malignant primary brain cancer, is driven by glioma stem cells (GSCs) resistant to current treatment. As Wnt-signaling is pivotal in stem cell maintenance, we wanted to explore its role in GSCs with the objective of finding distinct signaling mechanisms that could serve as potential therapeutic targets. We compared gene expression in GSCs (n=9) and neural stem cells from the adult human brain (ahNSC; n=3) to identify dysregulated genes in the Wnt signaling pathway. This identified a six-gene Wnt signature present in all nine primary GSC cultures, and the combined expression of three of these genes (SFRP1, SFRP4 and FZD7) reduced median survival of glioma patients from 38 to 17 months. Treatment with recombinant SFRP1 protein in primary cell cultures downregulated nuclear β-catenin and decreased in vitro proliferation and sphere formation in a dose-dependent manner. Furthermore, expressional and functional analysis of SFRP1-treated GSCs revealed that SFRP1 halts cell cycling and induces apoptosis. These observations demonstrate that Wnt signaling is dysregulated in GSC, and that inhibition of the Wnt pathway could serve as a therapeutic strategy in the treatment of GBM.
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247
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Fang L, Zhu Q, Neuenschwander M, Specker E, Wulf-Goldenberg A, Weis WI, von Kries JP, Birchmeier W. A Small-Molecule Antagonist of the β-Catenin/TCF4 Interaction Blocks the Self-Renewal of Cancer Stem Cells and Suppresses Tumorigenesis. Cancer Res 2015; 76:891-901. [PMID: 26645562 DOI: 10.1158/0008-5472.can-15-1519] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 11/23/2015] [Indexed: 01/18/2023]
Abstract
Wnt/β-catenin signaling is a highly conserved pathway essential for embryogenesis and tissue homeostasis. However, deregulation of this pathway can initiate and promote human malignancies, especially of the colon and head and neck. Therefore, Wnt/β-catenin signaling represents an attractive target for cancer therapy. We performed high-throughput screening using AlphaScreen and ELISA techniques to identify small molecules that disrupt the critical interaction between β-catenin and the transcription factor TCF4 required for signal transduction. We found that compound LF3, a 4-thioureido-benzenesulfonamide derivative, robustly inhibited this interaction. Biochemical assays revealed clues that the core structure of LF3 was essential for inhibition. LF3 inhibited Wnt/β-catenin signals in cells with exogenous reporters and in colon cancer cells with endogenously high Wnt activity. LF3 also suppressed features of cancer cells related to Wnt signaling, including high cell motility, cell-cycle progression, and the overexpression of Wnt target genes. However, LF3 did not cause cell death or interfere with cadherin-mediated cell-cell adhesion. Remarkably, the self-renewal capacity of cancer stem cells was blocked by LF3 in concentration-dependent manners, as examined by sphere formation of colon and head and neck cancer stem cells under nonadherent conditions. Finally, LF3 reduced tumor growth and induced differentiation in a mouse xenograft model of colon cancer. Collectively, our results strongly suggest that LF3 is a specific inhibitor of canonical Wnt signaling with anticancer activity that warrants further development for preclinical and clinical studies as a novel cancer therapy.
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Affiliation(s)
- Liang Fang
- Cancer Research Program, Max Delbrück Center for Molecular Medicine in the Helmholtz Society, Berlin, Germany
| | - Qionghua Zhu
- Cancer Research Program, Max Delbrück Center for Molecular Medicine in the Helmholtz Society, Berlin, Germany
| | | | - Edgar Specker
- Screening Unit, Leibniz-Institut fuer Molekulare Pharmakologie, Berlin, Germany
| | | | - William I Weis
- Department of Structural Biology, Stanford University, Stanford, California
| | - Jens P von Kries
- Screening Unit, Leibniz-Institut fuer Molekulare Pharmakologie, Berlin, Germany
| | - Walter Birchmeier
- Cancer Research Program, Max Delbrück Center for Molecular Medicine in the Helmholtz Society, Berlin, Germany.
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248
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Xiao YF, Yong X, Tang B, Qin Y, Zhang JW, Zhang D, Xie R, Yang SM. Notch and Wnt signaling pathway in cancer: Crucial role and potential therapeutic targets (Review). Int J Oncol 2015; 48:437-49. [PMID: 26648421 DOI: 10.3892/ijo.2015.3280] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 10/19/2015] [Indexed: 11/05/2022] Open
Abstract
There is no radical cure for all cancer types. The most frequently used therapies are surgical treatment, radiotherapy and chemotherapy. However, recrudescence, radiation resistance and chemotherapy resistance are the most challenging issues in clinical practice. To address these issues, they should be further studied at the molecular level, and the signaling pathways involved represent a promising avenue for this research. In the present review, we mainly discuss the components and mechanisms of activation of the Notch and Wnt signaling pathways, and we summarize the recent research efforts on these two pathways in different cancers. We also evaluate the ideal drugs that could target these two signaling pathways for cancer therapy, summarize alterations in the Notch and Wnt signaling pathways in cancer, and discuss potential signaling inhibitors as effective drugs for cancer therapy.
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Affiliation(s)
- Yu-Feng Xiao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Xin Yong
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Bo Tang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Yong Qin
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Jian-Wei Zhang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Dan Zhang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Rui Xie
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Shi-Ming Yang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
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Bayerlová M, Klemm F, Kramer F, Pukrop T, Beißbarth T, Bleckmann A. Newly Constructed Network Models of Different WNT Signaling Cascades Applied to Breast Cancer Expression Data. PLoS One 2015; 10:e0144014. [PMID: 26632845 PMCID: PMC4669165 DOI: 10.1371/journal.pone.0144014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 11/12/2015] [Indexed: 12/26/2022] Open
Abstract
INTRODUCTION WNT signaling is a complex process comprising multiple pathways: the canonical β-catenin-dependent pathway and several alternative non-canonical pathways that act in a β-catenin-independent manner. Representing these intricate signaling mechanisms through bioinformatic approaches is challenging. Nevertheless, a simplified but reliable bioinformatic WNT pathway model is needed, which can be further utilized to decipher specific WNT activation states within e.g. high-throughput data. RESULTS In order to build such a model, we collected, parsed, and curated available WNT signaling knowledge from different pathway databases. The data were assembled to construct computationally suitable models of different WNT signaling cascades in the form of directed signaling graphs. This resulted in four networks representing canonical WNT signaling, non-canonical WNT signaling, the inhibition of canonical WNT signaling and the regulation of WNT signaling pathways, respectively. Furthermore, these networks were integrated with microarray and RNA sequencing data to gain deeper insight into the underlying biology of gene expression differences between MCF-7 and MDA-MB-231 breast cancer cell lines, representing weakly and highly invasive breast carcinomas, respectively. Differential genes up-regulated in the MDA-MB-231 compared to the MCF-7 cell line were found to display enrichment in the gene set originating from the non-canonical network. Moreover, we identified and validated differentially regulated modules representing canonical and non-canonical WNT pathway components specific for the aggressive basal-like breast cancer subtype. CONCLUSIONS In conclusion, we demonstrated that these newly constructed WNT networks reliably reflect distinct WNT signaling processes. Using transcriptomic data, we shaped these networks into comprehensive modules of the genes implicated in the aggressive basal-like breast cancer subtype and demonstrated that non-canonical WNT signaling is important in this context. The topology of these networks can be further refined in the future by integration with complementary data such as protein-protein interactions, in order to gain greater insight into signaling processes.
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Affiliation(s)
- Michaela Bayerlová
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Florian Klemm
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Frank Kramer
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Tobias Pukrop
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Tim Beißbarth
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Annalen Bleckmann
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
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Xiao Q, Yang Y, Zhang X, An Q. Enhanced Wnt signaling by methylation-mediated loss of SFRP2 promotes osteosarcoma cell invasion. Tumour Biol 2015; 37:6315-21. [PMID: 26628297 DOI: 10.1007/s13277-015-4466-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 11/17/2015] [Indexed: 02/07/2023] Open
Abstract
Wnt signaling is essential for the initiation and progression of osteosarcoma (OS) tumors and is suppressed by the secreted frizzled-related proteins (SFRPs). The methylation-induced protein degradation reduces the activity of SFRPs and subsequently increases the activity of Wnt signaling. However, whether the methylation of SFRP2, a member of SFRPs, may be involved in the pathogenesis of OS is not known. Here, we investigated the expression levels of SFRP2 in OS specimens. We found that SFRP2 mRNA was significantly decreased and methylation of SFRP2 gene was significantly increased in malignant OS tumors as compared to the paired adjacent non-tumor tissue. Moreover, SFRP2 expression was significantly decreased in the malignant OS cell lines, SAOS2, MG63, and U2OS, but not in the primary osteoblast cells. The demethylation of SFRP2 gene by 5'-aza-deoxycytidine (5-aza-dCyd) in OS cell lines restored SFRP2 expression, at both mRNA and protein levels, and suppressed cell invasion. Furthermore, the demethylation of SFRP2 gene appeared to inhibit nuclear retention of a key Wnt signaling factor, β-catenin, in OS cell lines. Together, these data suggest that SFRP2 may function as an OS invasion suppressor by interfering with Wnt signaling, and the methylation of SFRP2 gene may promote pathogenesis of OS.
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Affiliation(s)
- Qiang Xiao
- Department of Hand Surgery, The First Affiliated Hospital of Liaoning Medical University, 2 Renmin Road, Guta District, Jinzhou, 121001, China.
| | - Yu Yang
- Department of Hand Surgery, The First Affiliated Hospital of Liaoning Medical University, 2 Renmin Road, Guta District, Jinzhou, 121001, China
| | - Xuepu Zhang
- Department of Hand Surgery, The First Affiliated Hospital of Liaoning Medical University, 2 Renmin Road, Guta District, Jinzhou, 121001, China
| | - Qing An
- Department of Hand Surgery, The First Affiliated Hospital of Liaoning Medical University, 2 Renmin Road, Guta District, Jinzhou, 121001, China
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