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Wang X, Jiang Z, Zhang Y, Wang X, Liu L, Fan Z. RNA sequencing analysis reveals protective role of kruppel-like factor 3 in colorectal cancer. Oncotarget 2017; 8:21984-21993. [PMID: 28423541 PMCID: PMC5400639 DOI: 10.18632/oncotarget.15766] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/27/2017] [Indexed: 01/03/2023] Open
Abstract
The Kruppel-like factor (KLF) family of transcription factors plays an important role in embryonic formation and cancer progression. This study was performed to determine the clinical importance of the KLF family in colorectal cancer (CRC). In total, 361 patients with CRC from The Cancer Genome Atlas (TCGA) cohort were used to comprehensively study the role of the KLF family in CRC. The results were then further validated using an in-house cohort (n=194). Univariate and multivariate Cox proportional hazards models were used to assess the risk factors for survival. In the TCGA cohort, KLF3 (hazard ratio [HR], 0.501; 95% confidence interval [CI], 0.272-0.920; P=0.025), KLF14 (HR, 1.454; 95% CI, 1.059-1.995; P=0.020), and KLF17 (HR, 1.241; 95% CI, 1.030-1.494, P=0.023) were identified as potential biomarkers in the univariate analysis, but after Cox proportional hazards analysis, only KLF3 (HR, 0.473; 95% CI, 0.230-0.831; P=0.012) was shown to be independently predictive of overall survival in patients with CRC. This finding was validated in our in-house cohort, which demonstrated that KLF3 expression was an independent predictor of both overall survival (HR, 0.628; 95% CI, 0.342-0.922; P=0.035) and disease-free survival (HR, 0.421; 95% CI, 0.317-0.697, P=0.016). KLF3 expression was inversely correlated with the N stage (P=0.015) and lymphovascular invasion (P=0.020). Collectively, loss of KLF3 was correlated with aggressive phenotypes and poor survival outcomes. KLF3 might be a potential new predictor and therapeutic target for CRC. Further study is needed for a more detailed understanding of the role of KLF3 in CRC.
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Affiliation(s)
- Xiaohong Wang
- Department of Digestive Endoscopy Center, Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.,Department of Gastroenterology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Zhonghua Jiang
- Department of Gastroenterology, First People's Hospital of Yancheng, Yancheng, Jiangsu Province, China
| | - Yu Zhang
- Department of Gastroenterology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Xiang Wang
- Department of Digestive Endoscopy Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Li Liu
- Department of Digestive Endoscopy Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Zhining Fan
- Department of Digestive Endoscopy Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
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Prabhu VV, Lulla AR, Madhukar NS, Ralff MD, Zhao D, Kline CLB, Van den Heuvel APJ, Lev A, Garnett MJ, McDermott U, Benes CH, Batchelor TT, Chi AS, Elemento O, Allen JE, El-Deiry WS. Cancer stem cell-related gene expression as a potential biomarker of response for first-in-class imipridone ONC201 in solid tumors. PLoS One 2017; 12:e0180541. [PMID: 28767654 PMCID: PMC5540272 DOI: 10.1371/journal.pone.0180541] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 06/16/2017] [Indexed: 11/21/2022] Open
Abstract
Cancer stem cells (CSCs) correlate with recurrence, metastasis and poor survival in clinical studies. Encouraging results from clinical trials of CSC inhibitors have further validated CSCs as therapeutic targets. ONC201 is a first-in-class small molecule imipridone in Phase I/II clinical trials for advanced cancer. We have previously shown that ONC201 targets self-renewing, chemotherapy-resistant colorectal CSCs via Akt/ERK inhibition and DR5/TRAIL induction. In this study, we demonstrate that the anti-CSC effects of ONC201 involve early changes in stem cell-related gene expression prior to tumor cell death induction. A targeted network analysis of gene expression profiles in colorectal cancer cells revealed that ONC201 downregulates stem cell pathways such as Wnt signaling and modulates genes (ID1, ID2, ID3 and ALDH7A1) known to regulate self-renewal in colorectal, prostate cancer and glioblastoma. ONC201-mediated changes in CSC-related gene expression were validated at the RNA and protein level for each tumor type. Accordingly, we observed inhibition of self-renewal and CSC markers in prostate cancer cell lines and patient-derived glioblastoma cells upon ONC201 treatment. Interestingly, ONC201-mediated CSC depletion does not occur in colorectal cancer cells with acquired resistance to ONC201. Finally, we observed that basal expression of CSC-related genes (ID1, CD44, HES7 and TCF3) significantly correlate with ONC201 efficacy in >1000 cancer cell lines and combining the expression of multiple genes leads to a stronger overall prediction. These proof-of-concept studies provide a rationale for testing CSC expression at the RNA and protein level as a predictive and pharmacodynamic biomarker of ONC201 response in ongoing clinical studies.
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Affiliation(s)
- Varun V. Prabhu
- Oncoceutics, Inc., Philadelphia, Pennsylvania, United States of America
- * E-mail: (WSED); (VVP)
| | - Amriti R. Lulla
- Fox Chase Cancer Center, Philadelphia, Pennsylvania, United States of America
- Penn State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Neel S. Madhukar
- Weill Cornell Medicine, New York, New York, United States of America
| | - Marie D. Ralff
- Fox Chase Cancer Center, Philadelphia, Pennsylvania, United States of America
| | - Dan Zhao
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | | | | | - Avital Lev
- Fox Chase Cancer Center, Philadelphia, Pennsylvania, United States of America
| | | | | | - Cyril H. Benes
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Tracy T. Batchelor
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Andrew S. Chi
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Olivier Elemento
- Weill Cornell Medicine, New York, New York, United States of America
| | - Joshua E. Allen
- Oncoceutics, Inc., Philadelphia, Pennsylvania, United States of America
| | - Wafik S. El-Deiry
- Fox Chase Cancer Center, Philadelphia, Pennsylvania, United States of America
- * E-mail: (WSED); (VVP)
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53
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Ilsley MD, Gillinder KR, Magor GW, Huang S, Bailey TL, Crossley M, Perkins AC. Krüppel-like factors compete for promoters and enhancers to fine-tune transcription. Nucleic Acids Res 2017; 45:6572-6588. [PMID: 28541545 PMCID: PMC5499887 DOI: 10.1093/nar/gkx441] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/22/2017] [Indexed: 12/16/2022] Open
Abstract
Krüppel-like factors (KLFs) are a family of 17 transcription factors characterized by a conserved DNA-binding domain of three zinc fingers and a variable N-terminal domain responsible for recruiting cofactors. KLFs have diverse functions in stem cell biology, embryo patterning, and tissue homoeostasis. KLF1 and related family members function as transcriptional activators via recruitment of co-activators such as EP300, whereas KLF3 and related members act as transcriptional repressors via recruitment of C-terminal Binding Proteins. KLF1 directly activates the Klf3 gene via an erythroid-specific promoter. Herein, we show KLF1 and KLF3 bind common as well as unique sites within the erythroid cell genome by ChIP-seq. We show KLF3 can displace KLF1 from key erythroid gene promoters and enhancers in vivo. Using 4sU RNA labelling and RNA-seq, we show this competition results in reciprocal transcriptional outputs for >50 important genes. Furthermore, Klf3-/- mice displayed exaggerated recovery from anemic stress and persistent cell cycling consistent with a role for KLF3 in dampening KLF1-driven proliferation. We suggest this study provides a paradigm for how KLFs work in incoherent feed-forward loops or networks to fine-tune transcription and thereby control diverse biological processes such as cell proliferation.
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Affiliation(s)
- Melissa D. Ilsley
- Mater Research Institute, Translational Research Institute, University of Queensland, Brisbane 4102, Australia
- School of Biomedical Sciences, University of Queensland, Brisbane 4072, Australia
| | - Kevin R. Gillinder
- Mater Research Institute, Translational Research Institute, University of Queensland, Brisbane 4102, Australia
| | - Graham W. Magor
- Mater Research Institute, Translational Research Institute, University of Queensland, Brisbane 4102, Australia
| | - Stephen Huang
- Mater Research Institute, Translational Research Institute, University of Queensland, Brisbane 4102, Australia
- School of Biomedical Sciences, University of Queensland, Brisbane 4072, Australia
| | | | | | - Andrew C. Perkins
- Mater Research Institute, Translational Research Institute, University of Queensland, Brisbane 4102, Australia
- School of Biomedical Sciences, University of Queensland, Brisbane 4072, Australia
- The Princess Alexandra Hospital, Brisbane 4102, Australia
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54
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Krebsbach PH, Villa-Diaz LG. The Role of Integrin α6 (CD49f) in Stem Cells: More than a Conserved Biomarker. Stem Cells Dev 2017; 26:1090-1099. [PMID: 28494695 DOI: 10.1089/scd.2016.0319] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Stem cells have the capacity for self-renewal and differentiation into specialized cells that form and repopulated all tissues and organs, from conception to adult life. Depending on their capacity for differentiation, stem cells are classified as totipotent (ie, zygote), pluripotent (ie, embryonic stem cells), multipotent (ie, neuronal stem cells, hematopoietic stem cells, epithelial stem cells, etc.), and unipotent (ie, spermatogonial stem cells). Adult or tissue-specific stem cells reside in specific niches located in, or nearby, their organ or tissue of origin. There, they have microenvironmental support to remain quiescent, to proliferate as undifferentiated cells (self-renewal), and to differentiate into progenitors or terminally differentiated cells that migrate from the niche to perform specialized functions. The presence of proteins at the cell surface is often used to identify, classify, and isolate stem cells. Among the diverse groups of cell surface proteins used for these purposes, integrin α6, also known as CD49f, may be the only biomarker commonly found in more than 30 different populations of stem cells, including some cancer stem cells. This broad expression among stem cell populations indicates that integrin α6 may play an important and conserved role in stem cell biology, which is reaffirmed by recent demonstrations of its role maintaining self-renewal of pluripotent stem cells and breast and glioblastoma cancer stem cells. Therefore, this review intends to highlight and synthesize new findings on the importance of integrin α6 in stem cell biology.
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Affiliation(s)
- Paul H Krebsbach
- 1 School of Dentistry, University of California , Los Angeles, California
| | - Luis G Villa-Diaz
- 2 Department of Biological Sciences, Oakland University , Rochester, Michigan
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55
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Knoedler JR, Subramani A, Denver RJ. The Krüppel-like factor 9 cistrome in mouse hippocampal neurons reveals predominant transcriptional repression via proximal promoter binding. BMC Genomics 2017; 18:299. [PMID: 28407733 PMCID: PMC5390390 DOI: 10.1186/s12864-017-3640-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 03/17/2017] [Indexed: 12/22/2022] Open
Abstract
Background Krüppel-like factor 9 (Klf9) is a zinc finger transcription factor that functions in neural cell differentiation, but little is known about its genomic targets or mechanism of action in neurons. Results We used the mouse hippocampus-derived neuronal cell line HT22 to identify genes regulated by Klf9, and we validated our findings in mouse hippocampus. We engineered HT22 cells to express a Klf9 transgene under control of the tetracycline repressor, and used RNA sequencing to identify genes modulated by Klf9. We found 217 genes repressed and 21 induced by Klf9. We also engineered HT22 cells to co-express biotin ligase and a Klf9 fusion protein containing an N-terminal biotin ligase recognition peptide. Using chromatin-streptavidin precipitation (ChSP) sequencing we identified 3,514 genomic regions where Klf9 associated. Seventy-five percent of these were within 1 kb of transcription start sites, and Klf9 associated in chromatin with 60% of the repressed genes. We analyzed the promoters of several repressed genes containing Klf9 ChSP peaks using transient transfection reporter assays and found that Klf9 repressed promoter activity, which was abolished after mutation of Sp/Klf-like motifs. Knockdown or knockout of Klf9 in HT22 cells caused dysregulation of Klf9 target genes. Chromatin immunoprecipitation assays showed that Klf9 associated in chromatin from mouse hippocampus with genes identified by ChSP sequencing on HT22 cells, and expression of Klf9 target genes was dysregulated in the hippocampus of neonatal Klf9-null mice. Gene ontology analysis revealed that Klf9 genomic targets include genes involved in cystokeletal remodeling, Wnt signaling and inflammation. Conclusions We have identified genomic targets of Klf9 in hippocampal neurons and created a foundation for future studies on how it functions in chromatin, and regulates neuronal morphology and survival across the lifespan. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3640-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Joseph R Knoedler
- Neuroscience Graduate Program, The University of Michigan, Ann Arbor, MI, 48109, USA.,Current address: Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, 94305, USA
| | - Arasakumar Subramani
- Department of Molecular, Cellular and Developmental Biology, The University of Michigan, 3065C Kraus Natural Science Building, Ann Arbor, MI, 48109, USA
| | - Robert J Denver
- Neuroscience Graduate Program, The University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Molecular, Cellular and Developmental Biology, The University of Michigan, 3065C Kraus Natural Science Building, Ann Arbor, MI, 48109, USA.
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56
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Flamant F, Gauthier K, Richard S. Genetic Investigation of Thyroid Hormone Receptor Function in the Developing and Adult Brain. Curr Top Dev Biol 2017; 125:303-335. [PMID: 28527576 DOI: 10.1016/bs.ctdb.2017.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Thyroid hormones exert a broad influence on brain development and function, which has been extensively studied over the years. Mouse genetics has brought an important contribution, allowing precise analysis of the interplay between TRα1 and TRβ1 nuclear receptors in neural cells. However, the exact contribution of each receptor, the possible intervention of nongenomic signaling, and the nature of the genetic program that is controlled by the receptors remain poorly understood.
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Affiliation(s)
- Frédéric Flamant
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France.
| | - Karine Gauthier
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France
| | - Sabine Richard
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France
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57
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Li JZ, Li J, Wang HQ, Li X, Wen B, Wang YJ. MiR-141-3p promotes prostate cancer cell proliferation through inhibiting kruppel-like factor-9 expression. Biochem Biophys Res Commun 2017; 482:1381-1386. [DOI: 10.1016/j.bbrc.2016.12.045] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 12/07/2016] [Indexed: 01/26/2023]
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58
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Tilghman J, Schiapparelli P, Lal B, Ying M, Quinones-Hinojosa A, Xia S, Laterra J. Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151. Neoplasia 2016; 18:185-98. [PMID: 26992919 PMCID: PMC4796809 DOI: 10.1016/j.neo.2016.02.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/29/2016] [Accepted: 02/09/2016] [Indexed: 01/06/2023] Open
Abstract
Glioblastoma (GBM) stem cells (GSCs) represent tumor-propagating cells with stem-like characteristics (stemness) that contribute disproportionately to GBM drug resistance and tumor recurrence. Understanding the mechanisms supporting GSC stemness is important for developing therapeutic strategies for targeting GSC-dependent oncogenic mechanisms. Using GBM-derived neurospheres, we identified the cell surface tetraspanin family member CD151 as a novel regulator of glioma cell stemness, GSC self-renewal capacity, migration, and tumor growth. CD151 was found to be overexpressed in GBM tumors and GBM neurospheres enriched in GSCs. Silencing CD151 inhibited neurosphere forming capacity, neurosphere cell proliferation, and migration and attenuated the expression of markers and transcriptional drivers of the GSC phenotype. Conversely, forced CD151 expression promoted neurosphere self-renewal, cell migration, and expression of stemness-associated transcription factors. CD151 was found to complex with integrins α3, α6, and β1 in neurosphere cells, and blocking CD151 interactions with integrins α3 and α6 inhibited AKT phosphorylation, a downstream effector of integrin signaling, and impaired sphere formation and neurosphere cell migration. Additionally, targeting CD151 in vivo inhibited the growth of GBM neurosphere-derived xenografts. These findings identify CD151 and its interactions with integrins α3 and α6 as potential therapeutic targets for inhibiting stemness-driving mechanisms and stem cell populations in GBM.
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Affiliation(s)
- Jessica Tilghman
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA; Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Paula Schiapparelli
- Department of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Bachuchu Lal
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA; Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Mingyao Ying
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA; Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Alfredo Quinones-Hinojosa
- Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA; Department of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA; Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Shuli Xia
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA; Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - John Laterra
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA; Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA; Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA; Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA.
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59
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Ma NKL, Lim JK, Leong MF, Sandanaraj E, Ang BT, Tang C, Wan ACA. Collaboration of 3D context and extracellular matrix in the development of glioma stemness in a 3D model. Biomaterials 2015; 78:62-73. [PMID: 26684838 DOI: 10.1016/j.biomaterials.2015.11.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/19/2015] [Accepted: 11/24/2015] [Indexed: 12/21/2022]
Abstract
A hierarchy of cellular stemness exists in certain cancers, and any successful strategy to treat such cancers would have to eliminate the self-renewing tumor-initiating cells at the apex of the hierarchy. The cellular microenvironment, in particular the extracellular matrix (ECM), is believed to have a role in regulating stemness. In this work, U251 glioblastoma cells are cultured on electrospun polystyrene (ESPS) scaffolds coated with an array of 7 laminin isoforms to provide a 3D model for stem cell-related genes and proteins expression studies. We observed collaboration between 3D context and laminins in promoting glioma stemness. Depending on the laminin isoform presented, U251 cells cultured on ESPS scaffolds (3D) exhibited increased expression of stemness markers compared to those cultured on tissue culture polystyrene (2D). Our results indicate the influence of 3D (versus 2D) context on integrin expression, specifically, the upregulation of the laminin-binding integrins alpha 6 and beta 4. By a colony forming assay, we showed enhanced clonogenicity of cells grown on ESPS scaffolds in collaboration with laminins 411, 421, 511 and 521. Evaluation of patient glioma databases demonstrated significant enrichment of integrin and ECM pathway networks in tumors of worse prognosis, consistent with our observations. The present results demonstrate how 3D versus 2D context profoundly affects ECM signaling, leading to stemness.
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Affiliation(s)
- Nina K L Ma
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Jia Kai Lim
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Meng Fatt Leong
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore; School of Applied Science, Temasek Polytechnic, Singapore 529757, Singapore
| | - Edwin Sandanaraj
- Department of Research, National Neuroscience Institute, Singapore 308433, Singapore; Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore 117609, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Beng Ti Ang
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore 117609, Singapore; Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore; Department of Neurosurgery, National Neuroscience Institute, Singapore 308433, Singapore; Duke-National University of Singapore Graduate Medical School, Singapore 169857, Singapore
| | - Carol Tang
- Department of Research, National Neuroscience Institute, Singapore 308433, Singapore; Duke-National University of Singapore Graduate Medical School, Singapore 169857, Singapore; Division of Medical Sciences, Humphrey Oei Institute of Cancer Research, National Cancer Centre, Singapore 169610, Singapore
| | - Andrew C A Wan
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
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Küspert M, Wegner M. SomethiNG 2 talk about-Transcriptional regulation in embryonic and adult oligodendrocyte precursors. Brain Res 2015; 1638:167-182. [PMID: 26232072 DOI: 10.1016/j.brainres.2015.07.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/14/2015] [Accepted: 07/18/2015] [Indexed: 12/26/2022]
Abstract
Glial cells that express the chondroitin sulfate proteoglycan NG2 represent an inherently heterogeneous population. These so-called NG2-glia are present during development and in the adult CNS, where they are referred to as embryonic oligodendrocyte precursors and adult NG2-glia, respectively. They give rise to myelinating oligodendrocytes at all times of life. Over the years much has been learnt about the transcriptional network in embryonic oligodendrocyte precursors, and several transcription factors from the HLH, HMG-domain, zinc finger and homeodomain protein families have been identified as main constituents. Much less is known about the corresponding network in adult NG2-glia. Here we summarize and discuss current knowledge on functions of each of these transcription factor families in NG2-glia, and where possible compare transcriptional regulation in embryonic oligodendrocyte precursors and adult NG2-glia. This article is part of a Special Issue entitled SI:NG2-glia (Invited only).
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Affiliation(s)
- Melanie Küspert
- Institut für Biochemie, Emil-Fischer-Zentrum, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, Erlangen D-91054, Germany.
| | - Michael Wegner
- Institut für Biochemie, Emil-Fischer-Zentrum, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, Erlangen D-91054, Germany.
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61
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Simmen RCM, Heard ME, Simmen AM, Montales MTM, Marji M, Scanlon S, Pabona JMP. The Krüppel-like factors in female reproductive system pathologies. J Mol Endocrinol 2015; 54:R89-R101. [PMID: 25654975 PMCID: PMC4369192 DOI: 10.1530/jme-14-0310] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Female reproductive tract pathologies arise largely from dysregulation of estrogen and progesterone receptor signaling, leading to aberrant cell proliferation, survival, and differentiation. The signaling pathways orchestrated by these nuclear receptors are complex, require the participation of many nuclear proteins serving as key binding partners or targets, and involve a range of paracrine and autocrine regulatory circuits. The members of the Krüppel-like factor (KLF) family of transcription factors are ubiquitously expressed in reproductive tissues and have been increasingly implicated as critical co-regulators and integrators of steroid hormone actions. Herein, we explore the involvement of KLF family members in uterine pathology, describe their currently known molecular mechanisms, and discuss their potential as targets for therapeutic intervention.
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Affiliation(s)
- Rosalia C M Simmen
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Melissa E Heard
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Angela M Simmen
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Maria Theresa M Montales
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Meera Marji
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Samantha Scanlon
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - John Mark P Pabona
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
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