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High throughput mutation screening of cardiac transcription factor GATA4 among Tanzania children with congenital heart diseases. THE NUCLEUS 2023. [DOI: 10.1007/s13237-022-00414-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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Yamamoto T, Kambayashi Y, Otsuka Y, Afouda B, Giuraniuc C, Michiue T, Hoppler S. Positive feedback regulation of frizzled-7 expression robustly shapes a steep Wnt gradient in Xenopus heart development, together with sFRP1 and heparan sulfate. eLife 2022; 11:73818. [PMID: 35942683 PMCID: PMC9363125 DOI: 10.7554/elife.73818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 06/29/2022] [Indexed: 11/13/2022] Open
Abstract
Secreted molecules called morphogens govern tissue patterning in a concentration-dependent manner. However, it is still unclear how reproducible patterning can be achieved with diffusing molecules, especially when that patterning concerns differentiation of thin tissues. Wnt is a morphogen that organizes cardiac development. Wnt6 patterns cardiogenic mesoderm to induce differentiation of a thin tissue, the pericardium, in Xenopus. In this study, we revealed that a Wnt receptor, frizzled-7, is expressed in a Wnt-dependent manner. With a combination of experiments and mathematical modeling, this receptor-feedback appears essential to shape a steep gradient of Wnt signaling. In addition, computer simulation revealed that this feedback imparts robustness against variations of Wnt ligand production and allows the system to reach a steady state quickly. We also found that a Wnt antagonist sFRP1, which is expressed on the opposite side of the Wnt source, accumulates on N-acetyl-rich heparan sulfate (HS). N-acetyl-rich HS concentration is high between the sources of Wnt and sFRP1, achieving local inhibition of Wnt signaling via restriction of sFRP1 spreading. These integrated regulatory systems restrict the Wnt signaling range and ensure reproducible patterning of the thin pericardium.
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Affiliation(s)
- Takayoshi Yamamoto
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo
| | - Yuta Kambayashi
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo
| | - Yuta Otsuka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo
| | - Boni Afouda
- Institute of Medical Sciences, The University of Aberdeen
| | | | - Tatsuo Michiue
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo
| | - Stefan Hoppler
- Institute of Medical Sciences, The University of Aberdeen
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Afouda BA. Towards Understanding the Gene-Specific Roles of GATA Factors in Heart Development: Does GATA4 Lead the Way? Int J Mol Sci 2022; 23:ijms23095255. [PMID: 35563646 PMCID: PMC9099915 DOI: 10.3390/ijms23095255] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/29/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
Abstract
Transcription factors play crucial roles in the regulation of heart induction, formation, growth and morphogenesis. Zinc finger GATA transcription factors are among the critical regulators of these processes. GATA4, 5 and 6 genes are expressed in a partially overlapping manner in developing hearts, and GATA4 and 6 continue their expression in adult cardiac myocytes. Using different experimental models, GATA4, 5 and 6 were shown to work together not only to ensure specification of cardiac cells but also during subsequent heart development. The complex involvement of these related gene family members in those processes is demonstrated through the redundancy among them and crossregulation of each other. Our recent identification at the genome-wide level of genes specifically regulated by each of the three family members and our earlier discovery that gata4 and gata6 function upstream, while gata5 functions downstream of noncanonical Wnt signalling during cardiac differentiation, clearly demonstrate the functional differences among the cardiogenic GATA factors. Such suspected functional differences are worth exploring more widely. It appears that in the past few years, significant advances have indeed been made in providing a deeper understanding of the mechanisms by which each of these molecules function during heart development. In this review, I will therefore discuss current evidence of the role of individual cardiogenic GATA factors in the process of heart development and emphasize the emerging central role of GATA4.
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Affiliation(s)
- Boni A Afouda
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Aberdeen AB25 2ZD, Scotland, UK
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Katraki-Pavlou S, Kastana P, Bousis D, Ntenekou D, Varela A, Davos CH, Nikou S, Papadaki E, Tsigkas G, Athanasiadis E, Herradon G, Mikelis CM, Beis D, Papadimitriou E. Protein tyrosine phosphatase receptor zeta 1 deletion triggers defective heart morphogenesis in mice and zebrafish. Am J Physiol Heart Circ Physiol 2021; 322:H8-H24. [PMID: 34767486 PMCID: PMC8754060 DOI: 10.1152/ajpheart.00400.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Protein tyrosine phosphatase receptor-ζ1 (PTPRZ1) is a transmembrane
tyrosine phosphatase receptor highly expressed in embryonic stem cells. In the
present work, gene expression analyses of Ptprz1−/− and Ptprz1+/+ mice endothelial cells and hearts pointed to
an unidentified role of PTPRZ1 in heart development through the regulation of
heart-specific transcription factor genes. Echocardiography analysis in mice
identified that both systolic and diastolic functions are affected in Ptprz1−/− compared with Ptprz1+/+ hearts, based on a dilated left
ventricular (LV) cavity, decreased ejection fraction and fraction shortening,
and increased angiogenesis in Ptprz1−/−
hearts, with no signs of cardiac hypertrophy. A zebrafish ptprz1−/− knockout was also generated and exhibited
misregulated expression of developmental cardiac markers, bradycardia, and
defective heart morphogenesis characterized by enlarged ventricles and defected
contractility. A selective PTPRZ1 tyrosine phosphatase inhibitor affected
zebrafish heart development and function in a way like what is observed in the
ptprz1−/− zebrafish. The same
inhibitor had no effect in the function of the adult zebrafish heart, suggesting
that PTPRZ1 is not important for the adult heart function, in line with data
from the human cell atlas showing very low to negligible PTPRZ1 expression in
the adult human heart. However, in line with the animal models, Ptprz1 was expressed in many different cell types in
the human fetal heart, such as valvar, fibroblast-like, cardiomyocytes, and
endothelial cells. Collectively, these data suggest that PTPRZ1 regulates
cardiac morphogenesis in a way that subsequently affects heart function and
warrant further studies for the involvement of PTPRZ1 in idiopathic congenital
cardiac pathologies. NEW & NOTEWORTHY Protein tyrosine phosphatase receptor
ζ1 (PTPRZ1) is expressed in fetal but not adult heart and seems
to affect heart development. In both mouse and zebrafish animal models, loss of
PTPRZ1 results in dilated left ventricle cavity, decreased ejection fraction,
and fraction shortening, with no signs of cardiac hypertrophy. PTPRZ1 also seems
to be involved in atrioventricular canal specification, outflow tract
morphogenesis, and heart angiogenesis. These results suggest that PTPRZ1 plays a
role in heart development and support the hypothesis that it may be involved in
congenital cardiac pathologies.
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Affiliation(s)
- Stamatiki Katraki-Pavlou
- Zebrafish Disease Models Lab, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation Academy of Athens, Greece.,Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, Greece
| | - Pinelopi Kastana
- Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, Greece
| | - Dimitris Bousis
- Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, Greece
| | - Despoina Ntenekou
- Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, Greece
| | - Aimilia Varela
- Cardiovascular Research Laboratory, Biomedical Research Foundation, Academy of Athens, Greece
| | - Constantinos H Davos
- Cardiovascular Research Laboratory, Biomedical Research Foundation, Academy of Athens, Greece
| | - Sophia Nikou
- Department of Anatomy-Histology-Embryology, Medical School, University of Patras, Greece
| | - Eleni Papadaki
- Department of Anatomy-Histology-Embryology, Medical School, University of Patras, Greece
| | - Grigorios Tsigkas
- Department of Cardiology, Patras University Hospital, Rio, Patras, Greece
| | | | - Gonzalo Herradon
- Department of Pharmaceutical and Health Sciences, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Madrid, Spain
| | - Constantinos M Mikelis
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, United States
| | - Dimitris Beis
- Zebrafish Disease Models Lab, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation Academy of Athens, Greece
| | - Evangelia Papadimitriou
- Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, Greece
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Qiao F, Wang Y, Zhang C, Zhou R, Wu Y, Wang C, Meng L, Mao P, Cheng Q, Luo C, Hu P, Xu Z. Comprehensive evaluation of genetic variants using chromosomal microarray analysis and exome sequencing in fetuses with congenital heart defect. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 58:377-387. [PMID: 33142350 DOI: 10.1002/uog.23532] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVE To evaluate comprehensively, using chromosomal microarray analysis (CMA) and exome sequencing (ES), the prevalence of chromosomal abnormalities and sequence variants in unselected fetuses with congenital heart defect (CHD) and to evaluate the potential diagnostic yields of CMA and ES for different CHD subgroups. METHODS This was a study of 360 unselected singleton fetuses with CHD detected by echocardiography, referred to our department for genetic testing between February 2018 and December 2019. We performed CMA, as a routine test for aneuploidy and copy number variations (CNV), and then, in cases without aneuploidy or pathogenic CNV on CMA, we performed ES. RESULTS Overall, positive genetic diagnoses were made in 84 (23.3%) fetuses: chromosomal abnormalities were detected by CMA in 60 (16.7%) and sequence variants were detected by ES in a further 24 (6.7%) cases. The detection rate of pathogenic and likely pathogenic genetic variants in fetuses with non-isolated CHD (32/83, 38.6%) was significantly higher than that in fetuses with isolated CHD (52/277, 18.8%) (P < 0.001), this difference being due mainly to the difference in frequency of aneuploidy between the two groups. The prevalence of a genetic defect was highest in fetuses with an atrioventricular septal defect (36.8%), ventricular septal defect with or without atrial septal defect (28.4%), conotruncal defect (22.2%) or right ventricular outflow tract obstruction (20.0%). We also identified two novel missense mutations (c.2447G>C, p.Arg816Pro; c.1171C>T, p.Arg391Cys) and a new phenotype caused by variants in PLD1. CONCLUSIONS Chromosomal abnormalities were identified in 16.7% and sequence variants in a further 6.7% of fetuses with CHD. ES should be offered to all pregnant women with a CHD fetus without chromosomal abnormality or pathogenic CNV identified by CMA, regardless of whether the CHD is isolated. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- F Qiao
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Y Wang
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - C Zhang
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - R Zhou
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Y Wu
- Department of Ultrasound, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - C Wang
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - L Meng
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - P Mao
- Personnel Division, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Q Cheng
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - C Luo
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - P Hu
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Z Xu
- Department of Prenatal Diagnosis, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
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6
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Aguilera KY, Dawson DW. WNT Ligand Dependencies in Pancreatic Cancer. Front Cell Dev Biol 2021; 9:671022. [PMID: 33996827 PMCID: PMC8113755 DOI: 10.3389/fcell.2021.671022] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/06/2021] [Indexed: 12/17/2022] Open
Abstract
WNT signaling promotes the initiation and progression of pancreatic ductal adenocarcinoma (PDAC) through wide-ranging effects on cellular proliferation, survival, differentiation, stemness, and tumor microenvironment. Of therapeutic interest is a genetically defined subset of PDAC known to have increased WNT/β-catenin transcriptional activity, growth dependency on WNT ligand signaling, and response to pharmacologic inhibitors of the WNT pathway. Here we review mechanisms underlying WNT ligand addiction in pancreatic tumorigenesis, as well as the potential utility of therapeutic approaches that functionally antagonize WNT ligand secretion or frizzled receptor binding.
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Affiliation(s)
- Kristina Y. Aguilera
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, United States
| | - David W. Dawson
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, United States
- Jonsson Comprehensive Cancer Center, David Geffen School of Medicine at University of California, Los Angeles, CA, United States
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Abstract
Congenital birth defects result from an abnormal development of an embryo and have detrimental effects on children's health. Specifically, congenital heart malformations are a leading cause of death among pediatric patients and often require surgical interventions within the first year of life. Increased efforts to navigate the human genome provide an opportunity to discover multiple candidate genes in patients suffering from birth defects. These efforts, however, fail to provide an explanation regarding the mechanisms of disease pathogenesis and emphasize the need for an efficient platform to screen candidate genes. Xenopus is a rapid, cost effective, high-throughput vertebrate organism to model the mechanisms behind human disease. This review provides numerous examples describing the successful use of Xenopus to investigate the contribution of patient mutations to complex phenotypes including congenital heart disease and heterotaxy. Moreover, we describe a variety of unique methods that allow us to rapidly recapitulate patients' phenotypes in frogs: gene knockout and knockdown strategies, the use of fate maps for targeted manipulations, and novel imaging modalities. The combination of patient genomics data and the functional studies in Xenopus will provide necessary answers to the patients suffering from birth defects. Furthermore, it will allow for the development of better diagnostic methods to ensure early detection and intervention. Finally, with better understanding of disease pathogenesis, new treatment methods can be tailored specifically to address patient's phenotype and genotype.
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Affiliation(s)
- Valentyna Kostiuk
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT, United States
| | - Mustafa K Khokha
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT, United States.
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8
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Jiang M, Liu T, Zhang J, Gao S, Tao B, Cao R, Qiu Y, Liu J, Li Y, Wang Y, Cao F. Rapamycin Promotes Cardiomyocyte Differentiation of Human Induced Pluripotent Stem Cells in a Stage-Dependent Manner. Stem Cells Dev 2020; 29:1229-1239. [PMID: 32693734 DOI: 10.1089/scd.2020.0025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) are a promising source for cardiac regenerative therapy, and ideal for in vitro cell modeling of cardiovascular diseases and drug screening. Recent studies have shown that rapamycin can promote cardiomyocyte differentiation in various stem cells. However, how rapamycin affects cardiomyocyte differentiation of iPSCs is still not fully understood. This study aimed to investigate the effect of rapamycin on cardiomyocyte differentiation based on embryoid body (EB) method. First, to determine the autophagy induction protocol, different concentrations of rapamycin were applied in hEBs on day 6. The autophagy was most significant when applying rapamycin at 1 μM for 48 h, demonstrating by the LC3II/LC3I ratio and p62 expression. Then, 1 μM rapamycin was applied for 48 h at different time points of cardiomyocyte differentiation to investigate the role of rapamycin in this process. Compared with control, rapamycin applied on days 0-4 of differentiation significantly decreased the proportion of beating EBs and expression of cardiomyocyte-specific genes, while rapamycin applied on days 4-14 significantly increased them. Among all groups, rapamycin applied on days 4-6 achieved highest cardiomyocyte differentiation efficiency. Furthermore, using autophagy inhibitor NH4Cl and GSK-3β inhibitor CHIR-99021, we found rapamycin-induced autophagy promoted cardiomyocyte differentiation at middle stage by negatively regulating the Wnt/β-catenin signaling pathway. These results suggest that rapamycin regulates EB-based cardiomyocyte differentiation in a stage-dependent manner, and the negative regulation of Wnt/β-catenin signaling pathway by autophagy was involved in the prodifferentiation effect of rapamycin at middle stage.
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Affiliation(s)
- Min Jiang
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Tong Liu
- Department of Cardiology, The Affiliated Hospital of Northwest University, Xi'an No.3 Hospital, Xi'an, China
| | - Jibin Zhang
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Shan Gao
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Bo Tao
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Ruihua Cao
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Ya Qiu
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Junsong Liu
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Yanhua Li
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Yabin Wang
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
| | - Feng Cao
- Department of Cardiology & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital & Medical School of Chinese PLA, Beijing, China
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Jha R, Li D, Wu Q, Ferguson KE, Forghani P, Gibson GC, Xu C. A long non-coding RNA GATA6-AS1 adjacent to GATA6 is required for cardiomyocyte differentiation from human pluripotent stem cells. FASEB J 2020; 34:14336-14352. [PMID: 32888237 DOI: 10.1096/fj.202000206r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 06/26/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022]
Abstract
Long noncoding RNAs (lncRNAs) are crucial in many cellular processes, yet relatively few have been shown to regulate human cardiomyocyte differentiation. Here, we demonstrate an essential role of GATA6 antisense RNA 1 (GATA6-AS1) in cardiomyocyte differentiation from human pluripotent stem cells (hPSCs). GATA6-AS1 is adjacent to cardiac transcription factor GATA6. We found that GATA6-AS1 was nuclear-localized and transiently upregulated along with GATA6 during the early stage of cardiomyocyte differentiation. The knockdown of GATA6-AS1 did not affect undifferentiated cell pluripotency but inhibited cardiomyocyte differentiation, as indicated by no or few beating cardiomyocytes and reduced expression of cardiomyocyte-specific proteins. Upon cardiac induction, the knockdown of GATA6-AS1 decreased GATA6 expression, altered Wnt-signaling gene expression, and reduced mesoderm development. Further characterization of the intergenic region between genomic regions of GATA6-AS1 and GATA6 indicated that the expression of GATA6-AS1 and GATA6 were regulated by a bidirectional promoter within the intergenic region. Consistently, GATA6-AS1 and GATA6 were co-expressed in several human tissues including the heart, similar to the mirror expression pattern of GATA6-AS1 and GATA6 during cardiomyocyte differentiation. Overall, these findings reveal a previously unrecognized and functional role of lncRNA GATA6-AS1 in controlling human cardiomyocyte differentiation.
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Affiliation(s)
- Rajneesh Jha
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Dong Li
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Qingling Wu
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.,Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA
| | - Katherine E Ferguson
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Parvin Forghani
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Gregory C Gibson
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Chunhui Xu
- Division of Pediatric Cardiology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.,Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA
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Differentiation of Human Cardiac Atrial Appendage Stem Cells into Adult Cardiomyocytes: A Role for the Wnt Pathway? Int J Mol Sci 2020; 21:ijms21113931. [PMID: 32486259 PMCID: PMC7312541 DOI: 10.3390/ijms21113931] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/26/2020] [Accepted: 05/28/2020] [Indexed: 11/30/2022] Open
Abstract
Human cardiac stem cells isolated from atrial appendages based on aldehyde dehydrogenase activity (CASCs) can be expanded in vitro and differentiate into mature cardiomyocytes. In this study, we assess whether Wnt activation stimulates human CASC proliferation, whereas Wnt inhibition induces cardiac maturation. CASCs were cultured as described before. Conventional PCR confirmed the presence of the Frizzled receptors. Small-molecule inhibitors (IWP2, C59, XAV939, and IWR1-endo) and activator (CHIR99021) of the Wnt/β -catenin signaling pathway were applied, and the effect on β-catenin and target genes for proliferation and differentiation was assessed by Western blot and RT-qPCR. CASCs express multiple early cardiac differentiation markers and are committed toward myocardial differentiation. They express several Frizzled receptors, suggesting a role for Wnt signaling in clonogenicity, proliferation, and differentiation. Wnt activation increases total and active β-catenin levels. However, this does not affect CASC proliferation or clonogenicity. Wnt inhibition upregulated early cardiac markers but could not induce mature myocardial differentiation. When CASCs are committed toward myocardial differentiation, the Wnt pathway is active and can be modulated. However, despite its role in cardiogenesis and myocardial differentiation of pluripotent stem-cell populations, our data indicate that Wnt signaling has limited effects on CASC clonogenicity, proliferation, and differentiation.
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11
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Schiffmann LM, Loeser H, Jacob AS, Maus M, Fuchs H, Zhao Y, Tharun L, Essakly A, Iannos Damanakis A, Zander T, Büttner R, Schröder W, Bruns C, Quaas A, Gebauer F. Dickkopf-2 (DKK2) as Context Dependent Factor in Patients with Esophageal Adenocarcinoma. Cancers (Basel) 2020; 12:cancers12020451. [PMID: 32075129 PMCID: PMC7072714 DOI: 10.3390/cancers12020451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/06/2020] [Accepted: 02/11/2020] [Indexed: 12/16/2022] Open
Abstract
Dickkopf-2 (DKK2) has been described as Wnt/beta-catenin pathway antagonist and its expression is mediated by micro RNA-221 (miRNA-221). So far, there is only limited data characterizing the role of DKK2 expression in esophageal cancer. A tissue micro array of 192 patients with esophageal adenocarcinoma was analyzed immunohistochemically for DKK2, miRNA-221 expression by RNA scope, and GATA6 amplification by fluorescence in-situ hybridization. The data was correlated with clinical, pathological and molecular data (TP53, HER2, c-myc, GATA6, PIK3CA, and KRAS amplifications). DKK2 expression was detectable in 21.7% and miRNA-221 expression in 33.5% of the patients. We observed no correlation between DKK2 or miRNA-221 expression and clinico-pathological data DKK2 expression was correlated with TP53 mutations and amplification of GATA6. We did not detect a survival difference in dependence of DKK2 for the total cohort, however, in patients without neoadjuvant treatment DKK2 expression correlated with a prolonged survival (median overall-survival 202 vs. 55 months, p = 0.012) which turned opposite in patients that underwent neoadjuvant treatment. High amounts of miRNA-221 were in trend associated with a prolonged overall-survival (p = 0.070). DKK2 as a Wnt antagonist is associated with prolonged survival in patients without neoadjuvant treatment and changes its prognostic value to the contrary in patients after neoadjuvant therapy. The modulatory effects of neoadjuvant treatment in connection with DKK2 expression are not fully understood, but when considering DKK2 as a tumor marker, it is necessary to see it in the context of neoadjuvant therapy.
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Affiliation(s)
- Lars M. Schiffmann
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Heike Loeser
- Department of Pathology, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (H.L.); (L.T.); (A.E.); (R.B.); (A.Q.)
| | - Anne Sophie Jacob
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Martin Maus
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Hans Fuchs
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Yue Zhao
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Lars Tharun
- Department of Pathology, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (H.L.); (L.T.); (A.E.); (R.B.); (A.Q.)
| | - Ahlem Essakly
- Department of Pathology, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (H.L.); (L.T.); (A.E.); (R.B.); (A.Q.)
| | - Alexander Iannos Damanakis
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Thomas Zander
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, Gastrointestinal Cancer Group Cologne (GCGC), University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany;
| | - Reinhard Büttner
- Department of Pathology, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (H.L.); (L.T.); (A.E.); (R.B.); (A.Q.)
| | - Wolfgang Schröder
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Christiane Bruns
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
| | - Alexander Quaas
- Department of Pathology, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (H.L.); (L.T.); (A.E.); (R.B.); (A.Q.)
| | - Florian Gebauer
- Department of General, Visceral and Cancer Surgery, University of Cologne, Kerpener Strasse 62, 50937 Cologne, Germany; (L.M.S.); (A.S.J.); (M.M.); (H.F.); (Y.Z.); (A.I.D.); (W.S.); (C.B.)
- Correspondence: ; Tel.: +49-221-478-4803; Fax: +49-221-478-6258
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12
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Liu Y, Lu P, Wang Y, Morrow BE, Zhou B, Zheng D. Spatiotemporal Gene Coexpression and Regulation in Mouse Cardiomyocytes of Early Cardiac Morphogenesis. J Am Heart Assoc 2019; 8:e012941. [PMID: 31322043 PMCID: PMC6761639 DOI: 10.1161/jaha.119.012941] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/06/2019] [Indexed: 12/18/2022]
Abstract
Background Heart tube looping to form a 4-chambered heart is a critical stage of embryonic heart development, but the gene drivers and their regulatory targets have not been extensively characterized at the cell-type level. Methods and Results To study the interaction of signaling pathways, transcription factors (TFs), and genetic networks in the process, we constructed gene co-expression networks and identified gene modules highly activated in individual cardiomyocytes at multiple anatomical regions and developmental stages using previously published single-cell RNA-seq data. Function analyses of the modules uncovered major pathways important for spatiotemporal cardiomyocyte differentiation. Interestingly, about half of the pathways were highly active in cardiomyocytes at the outflow tract (OFT) and atrioventricular canal, including well-known pathways for cardiac development and many newly identified ones. We predicted that these OFT-atrioventricular canal pathways were regulated by a large number of TFs actively expressed at the OFT-atrioventricular canal cardiomyocytes, with the prediction supported by motif enrichment analysis, including 10 TFs that have not been previously associated with cardiac development (eg, Etv5, Rbpms, and Baz2b). Furthermore, we found that TF targets in the OFT-atrioventricular canal modules were most significantly enriched with genes associated with mouse heart developmental abnormalities and human congenital heart defects, in comparison with TF targets in other modules, consistent with the critical developmental roles of OFT. Conclusions By analyzing gene co-expression at single cardiomyocytes, our systematic study has uncovered many known and additional new important TFs and their regulated molecular signaling pathways that are spatiotemporally active during heart looping.
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Affiliation(s)
- Yang Liu
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Pengfei Lu
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Yidong Wang
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
| | - Bernice E. Morrow
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of Ob/Gyn and PediatricsAlbert Einstein College of MedicineBronxNY
| | - Bin Zhou
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of Ob/Gyn and PediatricsAlbert Einstein College of MedicineBronxNY
- Department of MedicineAlbert Einstein College of MedicineBronxNY
| | - Deyou Zheng
- Department of GeneticsAlbert Einstein College of MedicineBronxNY
- Department of NeurologyAlbert Einstein College of MedicineBronxNY
- Department of NeuroscienceAlbert Einstein College of MedicineBronxNY
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13
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Bertke MM, Dubiak KM, Cronin L, Zeng E, Huber PW. A deficiency in SUMOylation activity disrupts multiple pathways leading to neural tube and heart defects in Xenopus embryos. BMC Genomics 2019; 20:386. [PMID: 31101013 PMCID: PMC6525467 DOI: 10.1186/s12864-019-5773-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 05/03/2019] [Indexed: 02/08/2023] Open
Abstract
Background Adenovirus protein, Gam1, triggers the proteolytic destruction of the E1 SUMO-activating enzyme. Microinjection of an empirically determined amount of Gam1 mRNA into one-cell Xenopus embryos can reduce SUMOylation activity to undetectable, but nonlethal, levels, enabling an examination of the role of this post-translational modification during early vertebrate development. Results We find that SUMOylation-deficient embryos consistently exhibit defects in neural tube and heart development. We have measured differences in gene expression between control and embryos injected with Gam1 mRNA at three developmental stages: early gastrula (immediately following the initiation of zygotic transcription), late gastrula (completion of the formation of the three primary germ layers), and early neurula (appearance of the neural plate). Although changes in gene expression are widespread and can be linked to many biological processes, three pathways, non-canonical Wnt/PCP, snail/twist, and Ets-1, are especially sensitive to the loss of SUMOylation activity and can largely account for the predominant phenotypes of Gam1 embryos. SUMOylation appears to generate different pools of a given transcription factor having different specificities with this post-translational modification involved in the regulation of more complex, as opposed to housekeeping, processes. Conclusions We have identified changes in gene expression that underlie the neural tube and heart phenotypes resulting from depressed SUMOylation activity. Notably, these developmental defects correspond to the two most frequently occurring congenital birth defects in humans, strongly suggesting that perturbation of SUMOylation, either globally or of a specific protein, may frequently be the origin of these pathologies. Electronic supplementary material The online version of this article (10.1186/s12864-019-5773-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Michelle M Bertke
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA.,Present Address: College of Computer, Mathematical, and Natural Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Kyle M Dubiak
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Laura Cronin
- Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Erliang Zeng
- Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, Indiana, 46556, USA.,Present Address: Division of Biostatistics and Computational Biology, Iowa Institute for Oral Health Research, University of Iowa, Iowa City, IA, 52242, USA.,Present Address: Department of Preventive & Community Dentistry, College of Dentistry, University of Iowa, Iowa City, IA, 52242, USA.,Present Address: Department of Biostatistics, University of Iowa, Iowa City, IA, 52242, USA.,Present Address: Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
| | - Paul W Huber
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA. .,Harper Cancer Research Institute, University of Notre Dame, Notre Dame, Indiana, USA. .,Center for Stem Cells and Regenerative Medicine, University of Notre Dame, Notre Dame, Indiana, 46556, USA.
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14
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Oulès B, Rognoni E, Hoste E, Goss G, Fiehler R, Natsuga K, Quist S, Mentink R, Donati G, Watt FM. Mutant Lef1 controls Gata6 in sebaceous gland development and cancer. EMBO J 2019; 38:embj.2018100526. [PMID: 30886049 PMCID: PMC6484415 DOI: 10.15252/embj.2018100526] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 02/17/2019] [Accepted: 02/19/2019] [Indexed: 12/21/2022] Open
Abstract
Mutations in Lef1 occur in human and mouse sebaceous gland (SG) tumors, but their contribution to carcinogenesis remains unclear. Since Gata6 controls lineage identity in SG, we investigated the link between these two transcription factors. Here, we show that Gata6 is a β‐catenin‐independent transcriptional target of mutant Lef1. During epidermal development, Gata6 is expressed in a subset of Sox9‐positive Lef1‐negative hair follicle progenitors that give rise to the upper SG. Overexpression of Gata6 by in utero lentiviral injection is sufficient to induce ectopic sebaceous gland elements. In mice overexpressing mutant Lef1, Gata6 ablation increases the total number of skin tumors yet decreases the proportion of SG tumors. The increased tumor burden correlates with impaired DNA mismatch repair and decreased expression of Mlh1 and Msh2 genes, defects frequently observed in human sebaceous neoplasia. Gata6 specifically marks human SG tumors and also defines tumors with elements of sebaceous differentiation, including a subset of basal cell carcinomas. Our findings reveal that Gata6 controls sebaceous gland development and cancer.
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Affiliation(s)
- Bénédicte Oulès
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK
| | - Emanuel Rognoni
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK.,Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Esther Hoste
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK.,Unit for Cellular and Molecular Pathophysiology, VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Georgina Goss
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK
| | | | - Ken Natsuga
- Department of Dermatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Sven Quist
- Clinic for Dermatology and Venereology, Otto-von-Guericke-University, Magdeburg, Germany
| | | | - Giacomo Donati
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK.,Department of Life Sciences and Systems Biology, Molecular Biotechnology Center, University of Turin, Turin, Italy
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, London, UK
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15
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Guo Y, Dorn T, Kühl SJ, Linnemann A, Rothe M, Pfister AS, Vainio S, Laugwitz KL, Moretti A, Kühl M. The Wnt inhibitor Dkk1 is required for maintaining the normal cardiac differentiation program in Xenopus laevis. Dev Biol 2019; 449:1-13. [PMID: 30797757 PMCID: PMC6496975 DOI: 10.1016/j.ydbio.2019.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 01/15/2019] [Accepted: 02/16/2019] [Indexed: 12/15/2022]
Abstract
Wnt proteins can activate different intracellular signaling pathways. These pathways need to be tightly regulated for proper cardiogenesis. The canonical Wnt/β-catenin inhibitor Dkk1 has been shown to be sufficient to trigger cardiogenesis in gain-of-function experiments performed in multiple model systems. Loss-of-function studies however did not reveal any fundamental function for Dkk1 during cardiogenesis. Using Xenopus laevis as a model we here show for the first time that Dkk1 is required for proper differentiation of cardiomyocytes, whereas specification of cardiomyocytes remains unaffected in absence of Dkk1. This effect is at least in part mediated through regulation of non-canonical Wnt signaling via Wnt11. In line with these observations we also found that Isl1, a critical regulator for specification of the common cardiac progenitor cell (CPC) population, acts upstream of Dkk1. Dkk1 is required for cardiac development in Xenopus laevis. The Wnt inhibitor Dkk1 acts downstream of Isl1 during cardiac development in vivo. Loss of Dkk1 has no impact on cardiac specification in Xenopus. Normal cardiac differentiation is impaired upon Dkk1 inhibition in Xenopus. Dkk1 regulates canonical Wnt/β-catenin signaling during Xenopus cardiogenesis.
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Affiliation(s)
- Yanchun Guo
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany; International Graduate School in Molecular Medicine Ulm, Ulm University, 89081 Ulm, Germany
| | - Tatjana Dorn
- Klinik und Poliklinik für Innere Medizin I, Klinikum Rechts der Isar der Technischen Universität München, Ismaninger Strasse 22, 81675 Munich, Germany
| | - Susanne J Kühl
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Alexander Linnemann
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Melanie Rothe
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany; International Graduate School in Molecular Medicine Ulm, Ulm University, 89081 Ulm, Germany
| | - Astrid S Pfister
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Seppo Vainio
- Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, InfoTech Oulu, Oulu University and Biobank Borealis of Northern Finland, Oulu University Hospital, Aapistie 5, FIN-90014, University of Oulu, Finland
| | - Karl-Ludwig Laugwitz
- Klinik und Poliklinik für Innere Medizin I, Klinikum Rechts der Isar der Technischen Universität München, Ismaninger Strasse 22, 81675 Munich, Germany; DZHK (German Centre for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany
| | - Alessandra Moretti
- Klinik und Poliklinik für Innere Medizin I, Klinikum Rechts der Isar der Technischen Universität München, Ismaninger Strasse 22, 81675 Munich, Germany; DZHK (German Centre for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany.
| | - Michael Kühl
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
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16
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Zhou W, Jiang D, Tian J, Liu L, Lu T, Huang X, Sun H. Acetylation of H3K4, H3K9, and H3K27 mediated by p300 regulates the expression of GATA4 in cardiocytes. Genes Dis 2018; 6:318-325. [PMID: 32042871 PMCID: PMC6997570 DOI: 10.1016/j.gendis.2018.10.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/08/2018] [Indexed: 12/23/2022] Open
Abstract
GATA4 is a particularly important cardiogenic transcription factor and serves as a potent driver of cardiogenesis. Recent progress in the field has made it clear that histone acetylation can influence gene expression through changing the structure of chromatin. Our previous research had revealed that hypo-acetylation could repress gata4 expression in cardiocytes, however the underlying mechanism by which this occurred was still unclear. To reveal the mechanism of histone acetylation involved in the regulation of gata4 transcription, we concentrated on P300, one of the important histone acetyltransferase associated with cardiogenesis. We found that P300 participated in gata4 expression through regulating histone acetylation in embryonic mouse hearts. RNAi-mediated downregulation of P300 modulated the global acetylation of H3 and the acetylation of H3K4, H3K9, and H3K27 in gata4 and Tbx5 promoters. Interestingly, there was an obvious inhibition of gata4 transcription, whereas Tbx5 was not influenced. Furthermore, SGC-CBP30, the selective inhibitor of the bromodomain in CBP/P300, downregulated gata4 transcription by repressing the acetylation of H3K4, H3K9, and H3K27 in the gata4 promoters. Taken together, our results identified that acetylation of H3K4, H3K9, and H3K27 mediated by P300 plays an important role in regulation of gata4 expression in cardiogenesis.
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Affiliation(s)
- Wei Zhou
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Dagui Jiang
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Jie Tian
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Lingjuan Liu
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Tiewei Lu
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China
| | - Xupei Huang
- Department of Biomedical Science, Charlie E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA
| | - Huichao Sun
- Heart Centre, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Heart Centre, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
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17
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Franco A, Zhang L, Matkovich SJ, Kovacs A, Dorn GW. G-protein receptor kinases 2, 5 and 6 redundantly modulate Smoothened-GATA transcriptional crosstalk in fetal mouse hearts. J Mol Cell Cardiol 2018; 121:60-68. [PMID: 29969579 PMCID: PMC6178805 DOI: 10.1016/j.yjmcc.2018.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/04/2018] [Accepted: 06/28/2018] [Indexed: 12/31/2022]
Abstract
G-protein receptor kinases (GRKs) regulate adult hearts by modulating inotropic, chronotropic and hypertrophic signaling of 7-transmembrane spanning neurohormone receptors. GRK-mediated desensitization and downregulation of β-adrenergic receptors has been implicated in adult heart failure; GRKs are therefore a promising therapeutic target. However, germ-line (but not cardiomyocyte-specific) GRK2 deletion provoked lethal fetal heart defects, suggesting an unexplained role for GRKs in heart development. Here we undertook to better understand the consequences of GRK deficiency on fetal heart development by creating mice and cultured murine embryonic fibroblasts (MEFs) having floxed GRK2 and GRK5 alleles on the GRK6 null background; simultaneous conditional deletion of these 3 GRK genes was achieved using Nkx2-5 Cre or adenoviral Cre, respectively. Phenotypes were related to GRK-modulated gene expression using whole-transcriptome RNA sequencing, RT-qPCR, and luciferase reporter assays. In cultured MEFs the atypical 7-transmembrane spanning protein and GRK2 substrate Smoothened (Smo) stimulated Gli-mediated transcriptional activity, which was interrupted by deleting GRK2/5/6. Mice with Nkx2-5 Cre mediated GRK2/5/6 ablation died between E15.5 and E16.5, whereas mice expressing any one of these 3 GRKs (i.e. GRK2/5, GRK2/6 or GRK5/6 deleted) were developmentally normal. GRK2/5/6 triple null mice at E14.5 exhibited left and right heart blood intermixing through single atrioventricular valves or large membranous ventricular septal defects. Hedgehog and GATA pathway gene expression promoted by Smo/Gli was suppressed in GRK2/5/6 deficient fetal hearts and MEFs. These data indicate that GRK2, GRK5 and GRK6 redundantly modulate Smo-GATA crosstalk in fetal mouse hearts, orchestrating transcriptional pathways previously linked to clinical and experimental atrioventricular canal defects. GRK modulation of Smo reflects convergence of conventional neurohormonal signaling and transcriptional regulation pathways, comprising an unanticipated mechanism for spatiotemporal orchestration of developmental gene expression in the heart.
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Affiliation(s)
- Antonietta Franco
- Center for Pharmacogenomics, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States.
| | - Lihong Zhang
- Center for Pharmacogenomics, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - Scot J Matkovich
- Center for Pharmacogenomics, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - Attila Kovacs
- Division of Cardiology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - Gerald W Dorn
- Center for Pharmacogenomics, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States.
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18
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Afouda BA, Lynch AT, de Paiva Alves E, Hoppler S. Genome-wide transcriptomics analysis of genes regulated by GATA4, 5 and 6 during cardiomyogenesis in Xenopus laevis. Data Brief 2018; 17:559-563. [PMID: 29876429 PMCID: PMC5988223 DOI: 10.1016/j.dib.2018.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 12/18/2017] [Accepted: 01/04/2018] [Indexed: 11/26/2022] Open
Abstract
The transcription factors GATA4, GATA5 and GATA6 play important roles in heart muscle differentiation. The data presented in this article are related to the research article entitled “Genome-wide transcriptomics analysis identifies sox7 and sox18 as specifically regulated by gata4 in cardiomyogenesis” (Afouda et al., 2017) [1]. The present study identifies genes regulated by these individual cardiogenic GATA factors using genome-wide transcriptomics analysis. We have presented genes that are specifically regulated by each of them, as well those regulated by either of them. The gene ontology terms (GO) associated with the genes differentially affected are also presented. The data set will allow further investigations on the gene regulatory network downstream of individual cardiogenic GATA factors during cardiac muscle formation.
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Affiliation(s)
- Boni A Afouda
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK
| | - Adam T Lynch
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK
| | - Eduardo de Paiva Alves
- Centre for Genome-Enabled Biology and Medicine, King's College Campus, University of Aberdeen, Scotland, UK
| | - Stefan Hoppler
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK
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19
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Abstract
Wnt signalling regulates cardiogenesis during specification of heart tissue and the morphogenetic movements necessary to form the linear heart. Wnt11-mediated non-canonical signalling promotes early cardiac development whilst Wnt11-R, which is expressed later, also signals through the non-canonical pathway to promote heart development. It is unclear which Frizzled proteins mediate these interactions. Frizzled-7 (fzd7) is expressed during gastrulation in the mesodermal cells fated to become heart, and then in the primary heart field. This expression is complementary to the expression of wnt11 and wnt11-R. We further show co-localisation of fzd7 with other early- and late-heart-specific markers using double in situ hybridisation. We have used loss of function analysis to determine the role of fzd7 during heart development. Morpholino antisense oligonucleotide-mediated knockdown of Fzd7 results in effects on heart development, similar to that caused by Wnt11 loss of function. Surprisingly, overexpression of dominant-negative Fzd7 cysteine rich domain (Fzd7 CRD) results in a cardia bifida phenotype, similar to the loss of wnt11-R phenotype. Overexpression of Fzd7 and activation of non-canonical wnt signalling can rescue the effect of Fzd7 CRD. We propose that Fzd7 has an important role during Xenopus heart development. Summary: Wnt signalling has been shown to be important in heart development. Here, we demonstrate that the wnt receptor fzd7 is required in mediating these Wnt signals.
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Affiliation(s)
- Muhammad Abu-Elmagd
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, P.O. Box 80216 Jeddah 21589, Kingdom of Saudi Arabia.,School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Joanna Mulvaney
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Grant N Wheeler
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
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20
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Afouda BA, Lynch AT, de Paiva Alves E, Hoppler S. Genome-wide transcriptomics analysis identifies sox7 and sox18 as specifically regulated by gata4 in cardiomyogenesis. Dev Biol 2017; 434:108-120. [PMID: 29229250 PMCID: PMC5814753 DOI: 10.1016/j.ydbio.2017.11.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 11/29/2017] [Accepted: 11/29/2017] [Indexed: 01/12/2023]
Abstract
The transcription factors GATA4, GATA5 and GATA6 are important regulators of heart muscle differentiation (cardiomyogenesis), which function in a partially redundant manner. We identified genes specifically regulated by individual cardiogenic GATA factors in a genome-wide transcriptomics analysis. The genes regulated by gata4 are particularly interesting because GATA4 is able to induce differentiation of beating cardiomyocytes in Xenopus and in mammalian systems. Among the specifically gata4-regulated transcripts we identified two SoxF family members, sox7 and sox18. Experimental reinstatement of gata4 restores sox7 and sox18 expression, and loss of cardiomyocyte differentiation due to gata4 knockdown is partially restored by reinstating sox7 or sox18 expression, while (as previously reported) knockdown of sox7 or sox18 interferes with heart muscle formation. In order to test for conservation in mammalian cardiomyogenesis, we confirmed in mouse embryonic stem cells (ESCs) undergoing cardiomyogenesis that knockdown of Gata4 leads to reduced Sox7 (and Sox18) expression and that Gata4 is also uniquely capable of promptly inducing Sox7 expression. Taken together, we identify an important and conserved gene regulatory axis from gata4 to the SoxF paralogs sox7 and sox18 and further to heart muscle cell differentiation. Gata 4, 5 and 6 have redundant and non-redundant functions in heart development. RNA-seq analysis of Gata4, 5 and 6 knockdown experiments was carried out. Genes specifically regulated by Gata4, 5 and 6 were identified. The SoxF genes sox7 and sox18 were identified as specifically regulated by Gata4. Epistasis demonstrates a regulatory axis from Gata4 to Sox7/18 to cardiomyogenesis.
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Affiliation(s)
- Boni A Afouda
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK
| | - Adam T Lynch
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK
| | - Eduardo de Paiva Alves
- Centre for Genome-Enabled Biology and Medicine, King's College Campus, University of Aberdeen, Scotland, UK
| | - Stefan Hoppler
- Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, Scotland, UK.
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21
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Piven OO, Winata CL. The canonical way to make a heart: β-catenin and plakoglobin in heart development and remodeling. Exp Biol Med (Maywood) 2017; 242:1735-1745. [PMID: 28920469 PMCID: PMC5714149 DOI: 10.1177/1535370217732737] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 08/29/2017] [Indexed: 12/12/2022] Open
Abstract
The main mediator of the canonical Wnt pathway, β-catenin, is a major effector of embryonic development, postnatal tissue homeostasis, and adult tissue regeneration. The requirement for β-catenin in cardiogenesis and embryogenesis has been well established. However, many questions regarding the molecular mechanisms by which β-catenin and canonical Wnt signaling regulate these developmental processes remain unanswered. An interesting question that emerged from our studies concerns how β-catenin signaling is modulated through interaction with other factors. Recent experimental data implicate new players in canonical Wnt signaling, particularly those which modulate β-catenin function in many its biological processes, including cardiogenesis. One of the interesting candidates is plakoglobin, a little-studied member of the catenin family which shares several mechanistic and functional features with its close relative, β-catenin. Here we have focused on the function of β-catenin in cardiogenesis. We also summarize findings on plakoglobin signaling function and discuss possible interplays between β-catenin and plakoglobin in the regulation of embryonic heart development. Impact statement Heart development, function, and remodeling are complex processes orchestrated by multiple signaling networks. This review examines our current knowledge of the role of canonical Wnt signaling in cardiogenesis and heart remodeling, focusing primarily on the mechanistic action of its effector β-catenin. We summarize the generally accepted understanding of the field based on experimental in vitro and in vivo data, and address unresolved questions in the field, specifically relating to the role of canonical Wnt signaling in heart maturation and regeneration. What are the modulators of canonical Wnt, and particularly what are the potential roles of plakoglobin, a close relative of β-catenin, in regulating Wnt signaling?Answers to these questions will enhance our understanding of the mechanism by which the canonical Wnt signaling regulates development of the heart and its regeneration after damage.
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Affiliation(s)
- Oksana O Piven
- Institute of Molecular Biology and Genetic, Kyiv 0314, Ukraine
| | - Cecilia L Winata
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
- Max Planck Institute for Heart and Lung Research, D-61231 Bad Nauheim, Germany
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22
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Ahmad SM. Conserved signaling mechanisms in Drosophila heart development. Dev Dyn 2017; 246:641-656. [PMID: 28598558 DOI: 10.1002/dvdy.24530] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 04/06/2017] [Accepted: 05/08/2017] [Indexed: 12/24/2022] Open
Abstract
Signal transduction through multiple distinct pathways regulates and orchestrates the numerous biological processes comprising heart development. This review outlines the roles of the FGFR, EGFR, Wnt, BMP, Notch, Hedgehog, Slit/Robo, and other signaling pathways during four sequential phases of Drosophila cardiogenesis-mesoderm migration, cardiac mesoderm establishment, differentiation of the cardiac mesoderm into distinct cardiac cell types, and morphogenesis of the heart and its lumen based on the proper positioning and cell shape changes of these differentiated cardiac cells-and illustrates how these same cardiogenic roles are conserved in vertebrates. Mechanisms bringing about the regulation and combinatorial integration of these diverse signaling pathways in Drosophila are also described. This synopsis of our present state of knowledge of conserved signaling pathways in Drosophila cardiogenesis and the means by which it was acquired should facilitate our understanding of and investigations into related processes in vertebrates. Developmental Dynamics 246:641-656, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Shaad M Ahmad
- Department of Biology, Indiana State University, Terre Haute, Indiana.,The Center for Genomic Advocacy, Indiana State University, Terre Haute, Indiana
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23
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Lorenzon A, Calore M, Poloni G, De Windt LJ, Braghetta P, Rampazzo A. Wnt/β-catenin pathway in arrhythmogenic cardiomyopathy. Oncotarget 2017; 8:60640-60655. [PMID: 28948000 PMCID: PMC5601168 DOI: 10.18632/oncotarget.17457] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/14/2017] [Indexed: 12/19/2022] Open
Abstract
Wnt/β-catenin signaling pathway plays essential roles in heart development as well as cardiac tissue homoeostasis in adults. Abnormal regulation of this signaling pathway is linked to a variety of cardiac disease conditions, including hypertrophy, fibrosis, arrhythmias, and infarction. Recent studies on genetically modified cellular and animal models document a crucial role of Wnt/β-catenin signaling in the molecular pathogenesis of arrhythmogenic cardiomyopathy (AC), an inherited disease of intercalated discs, typically characterized by ventricular arrhythmias and progressive substitution of the myocardium with fibrofatty tissue. In this review, we summarize the conflicting published data regarding the Wnt/β-catenin signaling contribution to AC pathogenesis and we report the identification of a new potential therapeutic molecule that prevents myocyte injury and cardiac dysfunction due to desmosome mutations in vitro and in vivo by interfering in this signaling pathway. Finally, we underline the potential function of microRNAs, epigenetic regulatory RNA factors reported to participate in several pathological responses in heart tissue and in the Wnt signaling network, as important modulators of Wnt/β-catenin signaling transduction in AC. Elucidation of the precise regulatory mechanism of Wnt/β-catenin signaling in AC molecular pathogenesis could provide fundamental insights for new mechanism-based therapeutic strategy to delay the onset or progression of this cardiac disease.
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Affiliation(s)
| | - Martina Calore
- Maastricht University, Department of Cardiology, Maastricht, The Netherlands
| | - Giulia Poloni
- University of Padua, Department of Biology, Padua, Italy
| | - Leon J De Windt
- Maastricht University, Department of Cardiology, Maastricht, The Netherlands
| | - Paola Braghetta
- University of Padua, Department of Molecular Medicine, Padua, Italy
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24
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Charney RM, Paraiso KD, Blitz IL, Cho KWY. A gene regulatory program controlling early Xenopus mesendoderm formation: Network conservation and motifs. Semin Cell Dev Biol 2017; 66:12-24. [PMID: 28341363 DOI: 10.1016/j.semcdb.2017.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/12/2017] [Accepted: 03/20/2017] [Indexed: 02/08/2023]
Abstract
Germ layer formation is among the earliest differentiation events in metazoan embryos. In triploblasts, three germ layers are formed, among which the endoderm gives rise to the epithelial lining of the gut tube and associated organs including the liver, pancreas and lungs. In frogs (Xenopus), where early germ layer formation has been studied extensively, the process of endoderm specification involves the interplay of dozens of transcription factors. Here, we review the interactions between these factors, summarized in a transcriptional gene regulatory network (GRN). We highlight regulatory connections conserved between frog, fish, mouse, and human endodermal lineages. Especially prominent is the conserved role and regulatory targets of the Nodal signaling pathway and the T-box transcription factors, Vegt and Eomes. Additionally, we highlight network topologies and motifs, and speculate on their possible roles in development.
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Affiliation(s)
- Rebekah M Charney
- Department of Developmental and Cell Biology, Ayala School of Biological Sciences, University of California, Irvine, CA 92697, USA
| | - Kitt D Paraiso
- Department of Developmental and Cell Biology, Ayala School of Biological Sciences, University of California, Irvine, CA 92697, USA
| | - Ira L Blitz
- Department of Developmental and Cell Biology, Ayala School of Biological Sciences, University of California, Irvine, CA 92697, USA
| | - Ken W Y Cho
- Department of Developmental and Cell Biology, Ayala School of Biological Sciences, University of California, Irvine, CA 92697, USA.
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25
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Hempel A, Kühl SJ, Rothe M, Rao Tata P, Sirbu IO, Vainio SJ, Kühl M. The CapZ interacting protein Rcsd1 is required for cardiogenesis downstream of Wnt11a in Xenopus laevis. Dev Biol 2017; 424:28-39. [PMID: 28237811 DOI: 10.1016/j.ydbio.2017.02.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/20/2017] [Accepted: 02/20/2017] [Indexed: 11/17/2022]
Abstract
Wnt proteins are critical for embryonic cardiogenesis and cardiomyogenesis by regulating different intracellular signalling pathways. Whereas canonical Wnt/β-catenin signalling is required for mesoderm induction and proliferation of cardiac progenitor cells, β-catenin independent, non-canonical Wnt signalling regulates cardiac specification and terminal differentiation. Although the diverse cardiac malformations associated with the loss of non-canonical Wnt11 in mice such as outflow tract (OFT) defects, reduced ventricular trabeculation, myofibrillar disorganization and reduced cardiac marker gene expression are well described, the underlying molecular mechanisms are still not completely understood. Here we aimed to further characterize Wnt11 mediated signal transduction during vertebrate cardiogenesis. Using Xenopus as a model system, we show by loss of function and corresponding rescue experiments that the non-canonical Wnt signalling mediator Rcsd1 is required downstream of Wnt11 for ventricular trabeculation, terminal differentiation of cardiomyocytes and cardiac morphogenesis. We here place Rcsd1 downstream of Wnt11 during cardiac development thereby providing a novel mechanism for how non-canonical Wnt signalling regulates vertebrate cardiogenesis.
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Affiliation(s)
- Annemarie Hempel
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany; International Graduate School in Molecular Medicine Ulm, IGradU, Ulm University, 89069 Ulm, Germany
| | - Susanne J Kühl
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Melanie Rothe
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany; International Graduate School in Molecular Medicine Ulm, IGradU, Ulm University, 89069 Ulm, Germany
| | - Purushothama Rao Tata
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany; International Graduate School in Molecular Medicine Ulm, IGradU, Ulm University, 89069 Ulm, Germany
| | - Ioan Ovidiu Sirbu
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Seppo J Vainio
- Faculty of Biochemistry and Molecular Medicine, BioCenter Oulu and InfoTech Oulu,University of Oulu, Aapistie 5, FIN-90014, Finland
| | - Michael Kühl
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany.
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26
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Yordanov B, Dunn SJ, Kugler H, Smith A, Martello G, Emmott S. A Method to Identify and Analyze Biological Programs through Automated Reasoning. NPJ Syst Biol Appl 2016; 2. [PMID: 27668090 PMCID: PMC5034891 DOI: 10.1038/npjsba.2016.10] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Predictive biology is elusive because rigorous, data-constrained, mechanistic models of complex biological systems are difficult to derive and validate. Current approaches tend to construct and examine static interaction network models, which are descriptively rich, but often lack explanatory and predictive power, or dynamic models that can be simulated to reproduce known behavior. However, in such approaches implicit assumptions are introduced as typically only one mechanism is considered, and exhaustively investigating all scenarios is impractical using simulation. To address these limitations, we present a methodology based on automated formal reasoning, which permits the synthesis and analysis of the complete set of logical models consistent with experimental observations. We test hypotheses against all candidate models, and remove the need for simulation by characterizing and simultaneously analyzing all mechanistic explanations of observed behavior. Our methodology transforms knowledge of complex biological processes from sets of possible interactions and experimental observations to precise, predictive biological programs governing cell function.
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Affiliation(s)
- Boyan Yordanov
- Microsoft Research, 21 Station Road, Cambridge, CB1 2FB, UK
| | - Sara-Jane Dunn
- Microsoft Research, 21 Station Road, Cambridge, CB1 2FB, UK
| | - Hillel Kugler
- Microsoft Research, 21 Station Road, Cambridge, CB1 2FB, UK.,Faculty of Engineering, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Austin Smith
- Wellcome Trust Medical Research Council Cambridge Stem Cell Institute, University of Cambridge CB2 1QR, UK.,Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Graziano Martello
- Dept. of Molecular Medicine, Complesso Vallisneri - 3 Piano Nord, University of Padua, Viale G. Colombo 3, 35131 Padua, Italy
| | - Stephen Emmott
- Microsoft Research, 21 Station Road, Cambridge, CB1 2FB, UK.,Faculty of Engineering Science, University College London, Torrington Place, London WC1E 7JE, UK
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27
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A Matter of the Heart: The African Clawed Frog Xenopus as a Model for Studying Vertebrate Cardiogenesis and Congenital Heart Defects. J Cardiovasc Dev Dis 2016; 3:jcdd3020021. [PMID: 29367567 PMCID: PMC5715680 DOI: 10.3390/jcdd3020021] [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: 02/18/2016] [Revised: 05/25/2016] [Accepted: 05/30/2016] [Indexed: 12/20/2022] Open
Abstract
The African clawed frog, Xenopus, is a valuable non-mammalian model organism to investigate vertebrate heart development and to explore the underlying molecular mechanisms of human congenital heart defects (CHDs). In this review, we outline the similarities between Xenopus and mammalian cardiogenesis, and provide an overview of well-studied cardiac genes in Xenopus, which have been associated with congenital heart conditions. Additionally, we highlight advantages of modeling candidate genes derived from genome wide association studies (GWAS) in Xenopus and discuss commonly used techniques.
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28
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Aksoy I, Marcy G, Chen J, Divakar U, Kumar V, John-Sanchez D, Rahmani M, Buckley NJ, Stanton LW. A Role for RE-1-Silencing Transcription Factor in Embryonic Stem Cells Cardiac Lineage Specification. Stem Cells 2016; 34:860-72. [PMID: 26864965 DOI: 10.1002/stem.2304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 12/16/2015] [Indexed: 11/09/2022]
Abstract
During development, lineage specification is controlled by several signaling pathways involving various transcription factors (TFs). Here, we studied the RE-1-silencing transcription factor (REST) and identified an important role of this TF in cardiac differentiation. Using mouse embryonic stem cells (ESC) to model development, we found that REST knockout cells lost the ability to differentiate into the cardiac lineage. Detailed analysis of specific lineage markers expression showed selective downregulation of endoderm markers in REST-null cells, thus contributing to a loss of cardiogenic signals. REST regulates cardiac differentiation of ESCs by negatively regulating the Wnt/β-catenin signaling pathway and positively regulating the cardiogenic TF Gata4. We propose here a new role for REST in cell fate specification besides its well-known repressive role of neuronal differentiation.
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Affiliation(s)
- Irene Aksoy
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore.,Stem Cell and Brain Research Institute, INSERM U1208, 69500 Bron, France.,University of Lyon, University of Lyon I, 69003 Lyon, France
| | - Guillaume Marcy
- Stem Cell and Brain Research Institute, INSERM U1208, 69500 Bron, France.,University of Lyon, University of Lyon I, 69003 Lyon, France
| | - Jiaxuan Chen
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore
| | - Ushashree Divakar
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore
| | - Vibhor Kumar
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore
| | - Daniel John-Sanchez
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore
| | - Mehran Rahmani
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore
| | - Noel J Buckley
- Department of Psychiatry, University of Oxford, Warneford Hospital, Headington, Oxford, UK
| | - Lawrence W Stanton
- Stem Cell and Regenerative Biology, Genome Institute of Singapore, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore
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29
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Ruiz-Villalba A, Hoppler S, van den Hoff MJB. Wnt signaling in the heart fields: Variations on a common theme. Dev Dyn 2016; 245:294-306. [PMID: 26638115 DOI: 10.1002/dvdy.24372] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 11/17/2015] [Accepted: 11/18/2015] [Indexed: 12/27/2022] Open
Abstract
Wnt signaling plays an essential role in development and differentiation. Heart development is initiated with the induction of precardiac mesoderm requiring the tightly and spatially controlled regulation of canonical and noncanonical Wnt signaling pathways. The role of Wnt signaling in subsequent development of the heart fields is to a large extent unclear. We will discuss the role of Wnt signaling in the development of the arterial and venous pole of the heart, highlighting the dual roles of Wnt signaling with respect to its time- and dosage-dependent effects and the balance between the canonical and noncanonical signaling. Canonical signaling appears to be involved in retaining the cardiac precursors in a proliferative and precursor state, whereas noncanonical signaling promotes their differentiation. Thereafter, both canonical and noncanonical signaling regulate specific steps in differentiation of the cardiac compartments. Because heart development is a contiguous, rather than a sequential, process, analyses tend only to show a single timeframe of development. The repetitive alternating and reciprocal effect of canonical and noncanonical signaling is lost when studied in homogenates. Without the simultaneous in vivo visualization of the different Wnt signaling pathways, the mechanism of Wnt signaling in heart development remains elusive.
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Affiliation(s)
- Adrián Ruiz-Villalba
- Academic Medical Center, Department of Anatomy, Embryology and Physiology, Amsterdam, The Netherlands
| | - Stefan Hoppler
- Cardiovascular Biology and Medicine Research Programme, Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom
| | - Maurice J B van den Hoff
- Academic Medical Center, Department of Anatomy, Embryology and Physiology, Amsterdam, The Netherlands
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30
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Xia L, Gong Y, Zhang A, Cai S, Zeng Q. Loss of GATA5 expression due to gene promoter methylation induces growth and colony formation of hepatocellular carcinoma cells. Oncol Lett 2015; 11:861-869. [PMID: 26870297 DOI: 10.3892/ol.2015.3974] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 08/18/2015] [Indexed: 02/06/2023] Open
Abstract
GATA5 is a transcription factor that is capable of suppressing the development of various types of human cancer. The present study investigated the expression of GATA5 and GATA4, and examined their roles in the proliferation and colony formation ability of hepatocellular carcinoma (HCC) tissues and cells. The GATA4 and GATA5 expression levels and gene promoter methylation of HCC tissue samples from 38 patients and HCC cell lines were analyzed using reverse transcription-polymerase chain reaction (RT-PCR) and methylation-specific PCR (MSP), respectively. The effects of GATA4 and GATA5 overexpression on the proliferation and colony forming ability of HCC cells were also assessed using cell viability and colony formation assays. A luciferase reporter assay was utilized to investigate the transcriptional interaction of GATA4 and GATA5 with canonical Wnt signaling. The results indicated that the expression levels of GATA4 and GATA5 were lost or reduced following methylation of gene promoters in HCC tissues and cell lines. Treatment with a demethylating agent, 5-aza-2'-deoxycytidine (5-AZA), restored GATA4 and GATA5 expression in HCC cell lines. Furthermore, methylation of the GATA5 promoter was observed to be associated with the age of patients exhibiting HCC. Restoration of GATA4 and GATA5 expression inhibited colony formation and induced apoptosis of HCC cells in vitro. The present study concluded that the expression levels of GATA4 and GATA5 were reduced in HCC tissues and cell lines. Treatment with 5-AZA restored GATA4 and GATA5 expression in HCC cell lines, suppressing tumor cell growth and colony formation, as well as inducing apoptosis.
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Affiliation(s)
- Lei Xia
- Department of Medical Security, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Yan Gong
- Health Management Institute, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Aiqun Zhang
- Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Shouwang Cai
- Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Qiang Zeng
- Health Management Institute, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
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31
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Mimoto MS, Kwon S, Green YS, Goldman D, Christian JL. GATA2 regulates Wnt signaling to promote primitive red blood cell fate. Dev Biol 2015; 407:1-11. [PMID: 26365900 DOI: 10.1016/j.ydbio.2015.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 08/06/2015] [Accepted: 08/13/2015] [Indexed: 10/23/2022]
Abstract
Primitive erythropoiesis is regulated in a non cell-autonomous fashion across evolution from frogs to mammals. In Xenopus laevis, signals from the overlying ectoderm are required to induce the mesoderm to adopt an erythroid fate. Previous studies in our lab identified the transcription factor GATA2 as a key regulator of this ectodermal signal. To identify GATA2 target genes in the ectoderm required for red blood cell formation in the mesoderm, we used microarray analysis to compare gene expression in ectoderm from GATA2 depleted and wild type embryos. Our analysis identified components of the non-canonical and canonical Wnt pathways as being reciprocally up- and down-regulated downstream of GATA2 in both mesoderm and ectoderm. We show that up-regulation of canonical Wnt signaling during gastrulation blocks commitment to a hematopoietic fate while down-regulation of non-canonical Wnt signaling impairs erythroid differentiation. Our results are consistent with a model in which GATA2 contributes to inhibition of canonical Wnt signaling, thereby permitting progenitors to exit the cell cycle and commit to a hematopoietic fate. Subsequently, activation of non-canonical Wnt signaling plays a later role in enabling these progenitors to differentiate as mature red blood cells.
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Affiliation(s)
- Mizuho S Mimoto
- Department of Cell and Developmental Biology Oregon Health and Science University, School of Medicine, Portland, OR 97239-3098, USA
| | - Sunjong Kwon
- Department of Cell and Developmental Biology Oregon Health and Science University, School of Medicine, Portland, OR 97239-3098, USA
| | - Yangsook Song Green
- Department of Neurobiology and Anatomy and Internal Medicine, Division of Hematology and Hematologic Malignancies University of Utah, School of Medicine, Salt Lake City, UT 94132, USA
| | - Devorah Goldman
- Department of Cell and Developmental Biology Oregon Health and Science University, School of Medicine, Portland, OR 97239-3098, USA
| | - Jan L Christian
- Department of Neurobiology and Anatomy and Internal Medicine, Division of Hematology and Hematologic Malignancies University of Utah, School of Medicine, Salt Lake City, UT 94132, USA.
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32
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Schmeckpeper J, Verma A, Yin L, Beigi F, Zhang L, Payne A, Zhang Z, Pratt RE, Dzau VJ, Mirotsou M. Inhibition of Wnt6 by Sfrp2 regulates adult cardiac progenitor cell differentiation by differential modulation of Wnt pathways. J Mol Cell Cardiol 2015; 85:215-25. [PMID: 26071893 PMCID: PMC4838816 DOI: 10.1016/j.yjmcc.2015.06.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 05/10/2015] [Accepted: 06/01/2015] [Indexed: 11/23/2022]
Abstract
Wnt signaling has recently emerged as an important regulator of cardiac progenitor cell proliferation and differentiation, but the exact mechanisms by which Wnt signaling modulates these effects are not known. Understanding these mechanisms is essential for advancing our knowledge of cardiac progenitor cell biology and applying this knowledge to enhance cardiac therapy. Here, we explored the effects of Sfrp2, a canonical Wnt inhibitor, in adult cardiac progenitor cell (CPC) differentiation and investigated the molecular mechanisms involved. Our data show that Sfrp2 treatment can promote differentiation of CPCs after ischemia-reperfusion injury. Treatment of CPCs with Sfrp2 inhibited CPC proliferation and primed them for cardiac differentiation. Sfrp2 binding to Wnt6 and inhibition of Wnt6 canonical pathway was essential for the inhibition of CPC proliferation. This inhibition of Wnt6 canonical signaling by Sfrp2 was important for activation of the non-canonical Wnt/Planar Cell Polarity (PCP) pathway through JNK, which in turn induced expression of cardiac transcription factors and CPC differentiation. Taken together, these results demonstrate a novel role of Sfrp2 and Wnt6 in regulating the dynamic process of CPC proliferation and differentiation, as well as providing new insights into the mechanisms of Wnt signaling in cardiac differentiation.
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Affiliation(s)
- Jeffrey Schmeckpeper
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Amanda Verma
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Lucy Yin
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Farideh Beigi
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Lunan Zhang
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Alan Payne
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Zhiping Zhang
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Richard E Pratt
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA; Duke Cardiovascular Research Center, Durham, NC 27710, USA
| | - Victor J Dzau
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA; Duke Cardiovascular Research Center, Durham, NC 27710, USA.
| | - Maria Mirotsou
- Division of Cardiology, Department of Medicine, Duke University Medical Center & Duke Cardiovascular Research Center, Durham, NC 27710, USA; Duke Cardiovascular Research Center, Durham, NC 27710, USA
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33
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Meganathan K, Sotiriadou I, Natarajan K, Hescheler J, Sachinidis A. Signaling molecules, transcription growth factors and other regulators revealed from in-vivo and in-vitro models for the regulation of cardiac development. Int J Cardiol 2015; 183:117-28. [PMID: 25662074 DOI: 10.1016/j.ijcard.2015.01.049] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 11/19/2014] [Accepted: 01/25/2015] [Indexed: 02/08/2023]
Abstract
Several in-vivo heart developmental models have been applied to decipher the cardiac developmental patterning encompassing early, dorsal, cardiac and visceral mesoderm as well as various transcription factors such as Gata, Hand, Tin, Dpp, Pnr. The expression of cardiac specific transcription factors, such as Gata4, Tbx5, Tbx20, Tbx2, Tbx3, Mef2c, Hey1 and Hand1 are of fundamental significance for the in-vivo cardiac development. Not only the transcription factors, but also the signaling molecules involved in cardiac development were conserved among various species. Enrichment of the bone morphogenic proteins (BMPs) in the anterior lateral plate mesoderm is essential for the initiation of myocardial differentiation and the cardiac developmental process. Moreover, the expression of a number of cardiac transcription factors and structural genes initiate cardiac differentiation in the medial mesoderm. Other signaling molecules such as TGF-beta, IGF-1/2 and the fibroblast growth factor (FGF) play a significant role in cardiac repair/regeneration, ventricular heart development and specification of early cardiac mesoderm, respectively. The role of the Wnt signaling in cardiac development is still controversial discussed, as in-vitro results differ dramatically in relation to the animal models. Embryonic stem cells (ESC) were utilized as an important in-vitro model for the elucidation of the cardiac developmental processes since they can be easily manipulated by numerous signaling molecules, growth factors, small molecules and genetic manipulation. Finally, in the present review the dynamic role of the long noncoding RNA and miRNAs in the regulation of cardiac development are summarized and discussed.
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Affiliation(s)
- Kesavan Meganathan
- Center of Physiology and Pathophysiology, Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Germany
| | - Isaia Sotiriadou
- Center of Physiology and Pathophysiology, Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Germany
| | - Karthick Natarajan
- Center of Physiology and Pathophysiology, Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Germany
| | - Jürgen Hescheler
- Center of Physiology and Pathophysiology, Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Germany
| | - Agapios Sachinidis
- Center of Physiology and Pathophysiology, Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Germany.
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Birket MJ, Mummery CL. Pluripotent stem cell derived cardiovascular progenitors--a developmental perspective. Dev Biol 2015; 400:169-79. [PMID: 25624264 DOI: 10.1016/j.ydbio.2015.01.012] [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: 12/06/2014] [Revised: 01/12/2015] [Accepted: 01/14/2015] [Indexed: 12/15/2022]
Abstract
Human pluripotent stem cells can now be routinely differentiated into cardiac cell types including contractile cardiomyocytes, enabling the study of heart development and disease in vitro, and creating opportunities for the development of novel therapeutic interventions for patients. Our grasp of the system, however, remains partial, and a significant reason for this has been our inability to effectively purify and expand the intermediate cardiovascular progenitor cells (CPCs) equivalent to those studied in heart development. Doing so could facilitate the construction of a cardiac lineage cell fate map, boosting our capacity to more finely control stem cell lineage commitment to functionally distinct cardiac identities, as well as providing a model for identifying which genes confer cardiac potential on CPCs. This review offers a perspective on CPC development as understood from model organisms and pluripotent stem cell systems, focusing on issues of identity as well as the signalling implicated in inducing, expanding and patterning these cells.
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Affiliation(s)
- Matthew J Birket
- Leiden University Medical Center, 2300 RC Leiden, The Netherlands
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35
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Dichmann DS, Walentek P, Harland RM. The alternative splicing regulator Tra2b is required for somitogenesis and regulates splicing of an inhibitory Wnt11b isoform. Cell Rep 2015; 10:527-36. [PMID: 25620705 DOI: 10.1016/j.celrep.2014.12.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 11/25/2014] [Accepted: 12/18/2014] [Indexed: 11/18/2022] Open
Abstract
Alternative splicing is pervasive in vertebrates, yet little is known about most isoforms or their regulation. transformer-2b (tra2b) encodes a splicing regulator whose endogenous function is poorly understood. Tra2b knockdown in Xenopus results in embryos with multiple defects, including defective somitogenesis. Using RNA sequencing, we identify 142 splice changes (mostly intron retention and exon skipping), 89% of which are not in current annotations. A previously undescribed isoform of wnt11b retains the last intron, resulting in a truncated ligand (Wnt11b-short). We show that this isoform acts as a dominant-negative ligand in cardiac gene induction and pronephric tubule formation. To determine the contribution of Wnt11b-short to the tra2b phenotype, we induce retention of intron 4 in wnt11b, which recapitulates the failure to form somites but not other tra2b morphant defects. This alternative splicing of a Wnt ligand adds intricacy to a complex signaling pathway and highlights intron retention as a regulatory mechanism.
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Affiliation(s)
- Darwin S Dichmann
- Department of Molecular & Cell Biology, 142 Life Sciences Addition #3200, University of California, Berkeley, Berkeley, CA 94720-3200, USA.
| | - Peter Walentek
- Department of Molecular & Cell Biology, 142 Life Sciences Addition #3200, University of California, Berkeley, Berkeley, CA 94720-3200, USA
| | - Richard M Harland
- Department of Molecular & Cell Biology, 142 Life Sciences Addition #3200, University of California, Berkeley, Berkeley, CA 94720-3200, USA.
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Sinha T, Lin L, Li D, Davis J, Evans S, Wynshaw-Boris A, Wang J. Mapping the dynamic expression of Wnt11 and the lineage contribution of Wnt11-expressing cells during early mouse development. Dev Biol 2014; 398:177-92. [PMID: 25448697 DOI: 10.1016/j.ydbio.2014.11.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 11/06/2014] [Accepted: 11/11/2014] [Indexed: 12/31/2022]
Abstract
Planar cell polarity (PCP) signaling is an evolutionarily conserved mechanism that coordinates polarized cell behavior to regulate tissue morphogenesis during vertebrate gastrulation, neurulation and organogenesis. In Xenopus and zebrafish, PCP signaling is activated by non-canonical Wnts such as Wnt11, and detailed understanding of Wnt11 expression has provided important clues on when, where and how PCP may be activated to regulate tissue morphogenesis. To explore the role of Wnt11 in mammalian development, we established a Wnt11 expression and lineage map with high spatial and temporal resolution by creating and analyzing a tamoxifen-inducible Wnt11-CreER BAC (bacterial artificial chromosome) transgenic mouse line. Our short- and long-term lineage tracing experiments indicated that Wnt11-CreER could faithfully recapitulate endogenous Wnt11 expression, and revealed for the first time that cells transiently expressing Wnt11 at early gastrulation were fated to become specifically the progenitors of the entire endoderm. During mid-gastrulation, Wnt11-CreER expressing cells also contribute extensively to the endothelium in both embryonic and extraembryonic compartments, and the endocardium in all chambers of the developing heart. In contrast, Wnt11-CreER expression in the myocardium starts from late-gastrulation, and occurs in three transient, sequential waves: first in the precursors of the left ventricular (LV) myocardium from E7.0 to 8.0; subsequently in the right ventricular (RV) myocardium from E8.0 to 9.0; and finally in the superior wall of the outflow tract (OFT) myocardium from E8.5 to 10.5. These results provide formal genetic proof that the majority of the endocardium and myocardium diverge by mid-gastrulation in the mouse, and suggest a tight spatial and temporal control of Wnt11 expression in the myocardial lineage to coordinate with myocardial differentiation in the first and second heart field progenitors to form the LV, RV and OFT. The insights gained from this study will also guide future investigations to decipher the role of non-canonical Wnt/PCP signaling in endoderm development, vasculogenesis and heart formation.
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Affiliation(s)
- Tanvi Sinha
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, United States
| | - Lizhu Lin
- Skaggs School of Pharmacy and Pharmaceutical Sciences & Department of Medicine, University of California, San Diego, United States
| | - Ding Li
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, United States
| | - Jennifer Davis
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, United States
| | - Sylvia Evans
- Skaggs School of Pharmacy and Pharmaceutical Sciences & Department of Medicine, University of California, San Diego, United States
| | - Anthony Wynshaw-Boris
- Department of Genetics, School of Medicine, Case Western Reserve University, United States
| | - Jianbo Wang
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, United States.
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Phasic modulation of Wnt signaling enhances cardiac differentiation in human pluripotent stem cells by recapitulating developmental ontogeny. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1843:2394-402. [DOI: 10.1016/j.bbamcr.2014.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 06/02/2014] [Accepted: 06/19/2014] [Indexed: 01/05/2023]
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Gao H, Wu X, Simon L, Fossett N. Antioxidants maintain E-cadherin levels to limit Drosophila prohemocyte differentiation. PLoS One 2014; 9:e107768. [PMID: 25226030 PMCID: PMC4167200 DOI: 10.1371/journal.pone.0107768] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 08/12/2014] [Indexed: 01/01/2023] Open
Abstract
Mitochondrial reactive oxygen species (ROS) regulate a variety of biological processes by networking with signal transduction pathways to maintain homeostasis and support adaptation to stress. In this capacity, ROS have been shown to promote the differentiation of progenitor cells, including mammalian embryonic and hematopoietic stem cells and Drosophila hematopoietic progenitors (prohemocytes). However, many questions remain about how ROS alter the regulatory machinery to promote progenitor differentiation. Here, we provide evidence for the hypothesis that ROS reduce E-cadherin levels to promote Drosophila prohemocyte differentiation. Specifically, we show that knockdown of the antioxidants, Superoxide dismutatase 2 and Catalase reduce E-cadherin protein levels prior to the loss of Odd-skipped-expressing prohemocytes. Additionally, over-expression of E-cadherin limits prohemocyte differentiation resulting from paraquat-induced oxidative stress. Furthermore, two established targets of ROS, Enhancer of Polycomb and FOS, control the level of E-cadherin protein expression. Finally, we show that knockdown of either Superoxide dismutatase 2 or Catalase leads to an increase in the E-cadherin repressor, Serpent. As a result, antioxidants and targets of ROS can control E-cadherin protein levels, and over-expression of E-cadherin can ameliorate the prohemocyte response to oxidative stress. Collectively, these data strongly suggest that ROS promote differentiation by reducing E-cadherin levels. In mammalian systems, ROS promote embryonic stem cell differentiation, whereas E-cadherin blocks differentiation. However, it is not known if elevated ROS reduce E-cadherin to promote embryonic stem cell differentiation. Thus, our findings may have identified an important mechanism by which ROS promote stem/progenitor cell differentiation.
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Affiliation(s)
- Hongjuan Gao
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - Xiaorong Wu
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - LaTonya Simon
- Department of Chemical and Biochemical Engineering, University of Maryland Baltimore County, Baltimore, MD, United States of America
| | - Nancy Fossett
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
- * E-mail:
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Carter DR, Buckle AD, Tanaka K, Perdomo J, Chong BH. Art27 interacts with GATA4, FOG2 and NKX2.5 and is a novel co-repressor of cardiac genes. PLoS One 2014; 9:e95253. [PMID: 24743694 PMCID: PMC3990687 DOI: 10.1371/journal.pone.0095253] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 03/25/2014] [Indexed: 11/20/2022] Open
Abstract
Transcription factors play a crucial role in regulation of cardiac biology. FOG-2 is indispensable in this setting, predominantly functioning through a physical interaction with GATA-4. This study aimed to identify novel co-regulators of FOG-2 to further elaborate on its inhibitory activity on GATA-4. The Art27 transcription factor was identified by a yeast-2-hybrid library screen to be a novel FOG-2 protein partner. Characterisation revealed that Art27 is co-expressed with FOG-2 and GATA-4 throughout cardiac myocyte differentiation and in multiple structures of the adult heart. Art27 physically interacts with GATA-4, FOG-2 and other cardiac transcription factors and by this means, down-regulates their activity on cardiac specific promoters α-myosin heavy chain, atrial natriuretic peptide and B-type natriuretic peptide. Regulation of endogenous cardiac genes by Art27 was shown using microarray analysis of P19CL6-Mlc2v-GFP cardiomyocytes. Together these results suggest that Art27 is a novel transcription factor that is involved in downregulation of cardiac specific genes by physically interacting and inhibiting the activity of crucial transcriptions factors involved in cardiac biology.
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Affiliation(s)
- Daniel R. Carter
- Centre for Vascular Research, Department of Medicine, St. George Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - Andrew D. Buckle
- Centre for Vascular Research, Department of Medicine, St. George Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - Kumiko Tanaka
- Centre for Vascular Research, Department of Medicine, St. George Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - Jose Perdomo
- Centre for Vascular Research, Department of Medicine, St. George Clinical School, University of New South Wales, Sydney, New South Wales, Australia
- * E-mail:
| | - Beng H. Chong
- Centre for Vascular Research, Department of Medicine, St. George Clinical School, University of New South Wales, Sydney, New South Wales, Australia
- Haematology Department, St George and Sutherland Hospitals, University of New South Wales, Sydney, New South Wales, Australia
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40
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Wnt-promoted Isl1 expression through a novel TCF/LEF1 binding site and H3K9 acetylation in early stages of cardiomyocyte differentiation of P19CL6 cells. Mol Cell Biochem 2014; 391:183-92. [DOI: 10.1007/s11010-014-2001-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 02/21/2014] [Indexed: 11/26/2022]
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41
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Novikov N, Evans T. Tmem88a mediates GATA-dependent specification of cardiomyocyte progenitors by restricting WNT signaling. Development 2013; 140:3787-98. [PMID: 23903195 DOI: 10.1242/dev.093567] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Biphasic control of WNT signaling is essential during cardiogenesis, but how the pathway switches from promoting cardiac mesoderm to restricting cardiomyocyte progenitor fate is unknown. We identified genes expressed in lateral mesoderm that are dysregulated in zebrafish when both gata5 and gata6 are depleted, causing a block to cardiomyocyte specification. This screen identified tmem88a, which is expressed in the early cardiac progenitor field and was previously implicated in WNT modulation by overexpression studies. Depletion of tmem88a results in a profound cardiomyopathy, secondary to impaired cardiomyocyte specification. In tmem88a morphants, activation of the WNT pathway exacerbates the cardiomyocyte deficiency, whereas WNT inhibition rescues progenitor cells and cardiogenesis. We conclude that specification of cardiac fate downstream of gata5/6 involves activation of the tmem88a gene to constrain WNT signaling and expand the number of cardiac progenitors. Tmem88a is a novel component of the regulatory mechanism controlling the second phase of biphasic WNT activity essential for embryonic cardiogenesis.
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Affiliation(s)
- Natasha Novikov
- Department of Surgery, Weill Cornell Medical College, Cornell University, 1300 York Ave., LC-708, New York, NY, USA
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42
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Gibb N, Lavery DL, Hoppler S. sfrp1 promotes cardiomyocyte differentiation in Xenopus via negative-feedback regulation of Wnt signalling. Development 2013; 140:1537-49. [PMID: 23482489 PMCID: PMC4074298 DOI: 10.1242/dev.088047] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2013] [Indexed: 01/14/2023]
Abstract
Wnt signalling is a key regulator of vertebrate heart development, yet it is unclear which specific Wnt signalling components are required to regulate which aspect of cardiogenesis. Previously, we identified Wnt6 as an endogenous Wnt ligand required for controlling heart muscle differentiation via canonical Wnt/β-catenin signalling. Here we show for the first time a requirement for an endogenous Wnt signalling inhibitor for normal heart muscle differentiation. Expression of sfrp1 is strongly induced in differentiating heart muscle. We show that sfrp1 is not only able to promote heart muscle differentiation but is also required for the formation of normal size heart muscle in the embryo. sfrp1 is functionally able to inhibit Wnt6 signalling and its requirement during heart development relates to relieving the cardiogenesis-restricting function of endogenous wnt6. In turn, we discover that sfrp1 expression in the heart is regulated by Wnt6 signalling, which for the first time indicates that sfrp genes can function as part of a Wnt negative-feedback regulatory loop. Our experiments indicate that sfrp1 controls the size of the differentiating heart muscle primarily by regulating cell fate within the cardiac mesoderm between muscular and non-muscular cell lineages. The cardiac mesoderm is therefore not passively patterned by signals from the surrounding tissue, but regulates its differentiation into muscular and non-muscular tissue using positional information from the surrounding tissue. This regulatory network might ensure that Wnt activation enables expansion and migration of cardiac progenitors, followed by Wnt inhibition permitting cardiomyocyte differentiation.
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Affiliation(s)
- Natalie Gibb
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | | | - Stefan Hoppler
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK
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43
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Archbold HC, Yang YX, Chen L, Cadigan KM. How do they do Wnt they do?: regulation of transcription by the Wnt/β-catenin pathway. Acta Physiol (Oxf) 2012; 204:74-109. [PMID: 21624092 DOI: 10.1111/j.1748-1716.2011.02293.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Wnt/β-catenin signalling is known to play many roles in metazoan development and tissue homeostasis. Misregulation of the pathway has also been linked to many human diseases. In this review, specific aspects of the pathway's involvement in these processes are discussed, with an emphasis on how Wnt/β-catenin signalling regulates gene expression in a cell and temporally specific manner. The T-cell factor (TCF) family of transcription factors, which mediate a large portion of Wnt/β-catenin signalling, will be discussed in detail. Invertebrates contain a single TCF gene that contains two DNA-binding domains, the high mobility group (HMG) domain and the C-clamp, which increases the specificity of DNA binding. In vertebrates, the situation is more complex, with four TCF genes producing many isoforms that contain the HMG domain, but only some of which possess a C-clamp. Vertebrate TCFs have been reported to act in concert with many other transcription factors, which may explain how they obtain sufficient specificity for specific DNA sequences, as well as how they achieve a wide diversity of transcriptional outputs in different cells.
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Affiliation(s)
- H C Archbold
- Program in Cell and Molecular Biology, University of Michigan, Ann Arbor, 48109-1048, USA
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44
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Abstract
Genetic studies of Wnt11 have revealed many insights into the roles and regulation of Wnt11, particularly during development. New tools to study Wnt11 have recently become available, making it timely to review the literature regarding this unique Wnt family member. In this study, we focus on mammalian Wnt11, describing its main sites of expression during development, and how the Wnt11 gene is regulated. We highlight an emerging theme in which canonical Wnt signals regulate Wnt11 expression through transcription factors in addition to, or other than, Tcf/LEF family members. We also discuss the frizzled family and other receptors that bind to Wnt11, the intracellular kinases and small GTPases that act downstream of Wnt11, and the effects of Wnt11 on Wnt/β-catenin signalling. Finally, we elaborate on the relevance of Wnt11 to human cancer, where it appears to be important both for proliferation and/or survival during normal differentiation and for migration/invasion.
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Affiliation(s)
- P Uysal-Onganer
- Department of Surgery and Cancer, Imperial College London, UK
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45
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Abstract
Cells from the animal pole of Xenopus blastula embryo possess pluripotency that can be used to generate various tissues and even functional organs ex vivo. This finding has sparkled development of a variety of experimental protocols to study mechanisms that underlie formation of various organs and explore strategies for organ engineering for clinical applications. In this chapter, key methods are described for using Xenopus stem-cell-like embryonic explants as an assay system for studying organ development, with a focus on cardiogenesis. This assay allows investigation of cardiogenesis in isolation from neighboring tissues, minimizes interference with other developmental processes, and presents the further advantage of a heterologous system to study cardiogenesis in isolation of endogenous development of the heart. The cardiogenic assays can be exploited to investigate molecular mechanisms and cellular processes that underlie function of different molecules involved in cardiogenesis.
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Affiliation(s)
- Boni A Afouda
- Institute of Medical Sciences, University of Aberdeen, Scotland, UK.
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46
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Wnt signaling and cardiac differentiation. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2012; 111:153-74. [PMID: 22917230 DOI: 10.1016/b978-0-12-398459-3.00007-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The Wnt family of secreted glycoproteins participates in a wide array of biological processes, including cellular differentiation, proliferation, survival, apoptosis, adhesion, angiogenesis, hypertrophy, and aging. The canonical Wnt signaling primarily utilizes β-catenin-mediated activation of transcription, while the noncanonical mechanisms involve a calcium-dependent protein kinase C-mediated Wnt/Ca(2+) pathway and a dishevelled-dependent c-Jun N-terminal kinase-mediated planar cell polarity pathway. Although both canonical and noncanonical Wnts have been implicated in cardiac specification, morphogenesis, and differentiation; the molecular events remain unclear and often depend on the cell type and biological context. In this regard, growing evidence indicates that Wnt11 is able to induce cardiogenesis not only during embryonic development but also in adult cells. The cardiogenic properties of Wnt11 may prove useful for preprogramming adult stem cells before myocardial transplantation. Further, elucidation of the molecular steps in Wnt11-induced cardiac differentiation will be necessary to enhance the outcomes of cardiac cell therapy.
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47
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Taubenschmid J, Weitzer G. Mechanisms of cardiogenesis in cardiovascular progenitor cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2012; 293:195-267. [PMID: 22251563 PMCID: PMC7615846 DOI: 10.1016/b978-0-12-394304-0.00012-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Self-renewing cells of the vertebrate heart have become a major subject of interest in the past decade. However, many researchers had a hard time to argue against the orthodox textbook view that defines the heart as a postmitotic organ. Once the scientific community agreed on the existence of self-renewing cells in the vertebrate heart, their origin was again put on trial when transdifferentiation, dedifferentiation, and reprogramming could no longer be excluded as potential sources of self-renewal in the adult organ. Additionally, the presence of self-renewing pluripotent cells in the peripheral blood challenges the concept of tissue-specific stem and progenitor cells. Leaving these unsolved problems aside, it seems very desirable to learn about the basic biology of this unique cell type. Thus, we shall here paint a picture of cardiovascular progenitor cells including the current knowledge about their origin, basic nature, and the molecular mechanisms guiding proliferation and differentiation into somatic cells of the heart.
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Affiliation(s)
- Jasmin Taubenschmid
- Max F. Perutz Laboratories, Department of Medical Biochemistry, Medical University of Vienna, Vienna, Austria
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48
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Neto A, Mercader N, Gómez-Skarmeta JL. The Osr1 and Osr2 genes act in the pronephric anlage downstream of retinoic acid signaling and upstream of Wnt2b to maintain pectoral fin development. Development 2011; 139:301-11. [PMID: 22129829 DOI: 10.1242/dev.074856] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Vertebrate odd-skipped related genes (Osr) have an essential function during the formation of the intermediate mesoderm (IM) and the kidney structures derived from it. Here, we show that these genes are also crucial for limb bud formation in the adjacent lateral plate mesoderm (LPM). Reduction of zebrafish Osr function impairs fin development by the failure of tbx5a maintenance in the developing pectoral fin bud. Osr morphant embryos show reduced wnt2b expression, and increasing Wnt signaling in Osr morphant embryos partially rescues tbx5a expression. Thus, Osr genes control limb bud development in a non-cell-autonomous manner, probably through the activation of Wnt2b. Finally, we demonstrate that Osr genes are downstream targets of retinoic acid (RA) signaling. Therefore, Osr genes act as a relay within the genetic cascade of fin bud formation: by controlling the expression of the signaling molecule Wnt2ba in the IM they play an essential function transmitting the RA signaling originated in the somites to the LPM.
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Affiliation(s)
- Ana Neto
- Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas/Universidad Pablo de Olavide, Carretera de Utrera Km1, 41013 Sevilla, Spain
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49
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Distinct phases of Wnt/β-catenin signaling direct cardiomyocyte formation in zebrafish. Dev Biol 2011; 361:364-76. [PMID: 22094017 DOI: 10.1016/j.ydbio.2011.10.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 10/25/2011] [Accepted: 10/27/2011] [Indexed: 02/02/2023]
Abstract
Normal heart formation requires reiterative phases of canonical Wnt/β-catenin (Wnt) signaling. Understanding the mechanisms by which Wnt signaling directs cardiomyocyte (CM) formation in vivo is critical to being able to precisely direct differentiated CMs from stem cells in vitro. Here, we investigate the roles of Wnt signaling in zebrafish CM formation using heat-shock inducible transgenes that increase and decrease Wnt signaling. We find that there are three phases during which CM formation is sensitive to modulation of Wnt signaling through the first 24 h of development. In addition to the previously recognized roles for Wnt signaling during mesoderm specification and in the pre-cardiac mesoderm, we find a previously unrecognized role during CM differentiation where Wnt signaling is necessary and sufficient to promote the differentiation of additional atrial cells. We also extend the previous studies of the roles of Wnt signaling during mesoderm specification and in pre-cardiac mesoderm. Importantly, in pre-cardiac mesoderm we define a new mechanism where Wnt signaling is sufficient to prevent CM differentiation, in contrast to a proposed role in inhibiting cardiac progenitor (CP) specification. The inability of the CPs to differentiate appears to lead to cell death through a p53/Caspase-3 independent mechanism. Together with a report for an even later role for Wnt signaling in restricting proliferation of differentiated ventricular CMs, our results indicate that during the first 3days of development in zebrafish there are four distinct phases during which CMs are sensitive to Wnt signaling.
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50
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Planar cell polarity signaling pathway in congenital heart diseases. J Biomed Biotechnol 2011; 2011:589414. [PMID: 22131815 PMCID: PMC3205795 DOI: 10.1155/2011/589414] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 08/31/2011] [Indexed: 12/14/2022] Open
Abstract
Congenital heart disease (CHD) is a common cardiac disorder in humans. Despite many advances in the understanding of CHD and the identification of many associated genes, the fundamental etiology for the majority of cases remains unclear. The planar cell polarity (PCP) signaling pathway, responsible for tissue polarity in Drosophila and gastrulation movements and cardiogenesis in vertebrates, has been shown to play multiple roles during cardiac differentiation and development. The disrupted function of PCP signaling is connected to some CHDs. Here, we summarize our current understanding of how PCP factors affect the pathogenesis of CHD.
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