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Riva C, Hajduskova M, Gally C, Suman SK, Ahier A, Jarriault S. A natural transdifferentiation event involving mitosis is empowered by integrating signaling inputs with conserved plasticity factors. Cell Rep 2022; 40:111365. [PMID: 36130499 PMCID: PMC9513805 DOI: 10.1016/j.celrep.2022.111365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 04/09/2022] [Accepted: 08/25/2022] [Indexed: 11/03/2022] Open
Abstract
Transdifferentiation, or direct cell reprogramming, is the conversion of one fully differentiated cell type into another. Whether core mechanisms are shared between natural transdifferentiation events when occurring with or without cell division is unclear. We have previously characterized the Y-to-PDA natural transdifferentiation in Caenorhabditis elegans, which occurs without cell division and requires orthologs of vertebrate reprogramming factors. Here, we identify a rectal-to-GABAergic transdifferentiation and show that cell division is required but not sufficient for conversion. We find shared mechanisms, including erasure of the initial identity, which requires the conserved reprogramming factors SEM-4/SALL, SOX-2, CEH-6/OCT, and EGL-5/HOX. We also find three additional and parallel roles of the Wnt signaling pathway: selection of a specific daughter, removal of the initial identity, and imposition of the precise final subtype identity. Our results support a model in which levels and antagonistic activities of SOX-2 and Wnt signaling provide a timer for the acquisition of final identity.
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Affiliation(s)
- Claudia Riva
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France
| | - Martina Hajduskova
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France
| | - Christelle Gally
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France.
| | - Shashi Kumar Suman
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France
| | - Arnaud Ahier
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France
| | - Sophie Jarriault
- Development and Stem Cells Department, IGBMC, CNRS UMR 7104, Inserm U 1258, Université de Strasbourg, 67400 Illkirch, France.
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2
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Kim SE, Robles-Lopez K, Cao X, Liu K, Chothani PJ, Bhavani N, Rahman L, Mukhopadhyay S, Wlodarczyk BJ, Finnell RH. Wnt1 Lineage Specific Deletion of Gpr161 Results in Embryonic Midbrain Malformation and Failure of Craniofacial Skeletal Development. Front Genet 2021; 12:761418. [PMID: 34887903 PMCID: PMC8650154 DOI: 10.3389/fgene.2021.761418] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/04/2021] [Indexed: 11/13/2022] Open
Abstract
Sonic hedgehog (Shh) signaling regulates multiple morphogenetic processes during embryonic neurogenesis and craniofacial skeletal development. Gpr161 is a known negative regulator of Shh signaling. Nullizygous Gpr161 mice are embryonic lethal, presenting with structural defects involving the neural tube and the craniofacies. However, the lineage specific role of Gpr161 in later embryonic development has not been thoroughly investigated. We studied the Wnt1-Cre lineage specific role of Gpr161 during mouse embryonic development. We observed three major gross morphological phenotypes in Gpr161 cKO (Gpr161 f/f; Wnt1-Cre) fetuses; protrusive tectum defect, encephalocele, and craniofacial skeletal defect. The overall midbrain tissues were expanded and cell proliferation in ventricular zones of midbrain was increased in Gpr161 cKO fetuses, suggesting that protrusive tectal defects in Gpr161 cKO are secondary to the increased proliferation of midbrain neural progenitor cells. Shh signaling activity as well as upstream Wnt signaling activity were increased in midbrain tissues of Gpr161 cKO fetuses. RNA sequencing further suggested that genes in the Shh, Wnt, Fgf and Notch signaling pathways were differentially regulated in the midbrain of Gpr161 cKO fetuses. Finally, we determined that cranial neural crest derived craniofacial bone formation was significantly inhibited in Gpr161 cKO fetuses, which partly explains the development of encephalocele. Our results suggest that Gpr161 plays a distinct role in midbrain development and in the formation of the craniofacial skeleton during mouse embryogenesis.
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Affiliation(s)
- Sung-Eun Kim
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States
| | - Karla Robles-Lopez
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States.,Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, United States
| | - Xuanye Cao
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, United States
| | - Kristyn Liu
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States
| | - Pooja J Chothani
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States
| | - Nikitha Bhavani
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States
| | - Lauren Rahman
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States
| | - Saikat Mukhopadhyay
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Bogdan J Wlodarczyk
- Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, United States
| | - Richard H Finnell
- Department of Pediatrics, Dell Pediatric Research Institute, University of Texas at Austin Dell Medical School, Austin, TX, United States.,Center for Precision Environmental Health, Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, United States.,Departments of Molecular and Human Genetics and Medicine, Baylor College of Medicine, Houston, TX, United States
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3
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Nouri P, Götz S, Rauser B, Irmler M, Peng C, Trümbach D, Kempny C, Lechermeier CG, Bryniok A, Dlugos A, Euchner E, Beckers J, Brodski C, Klümper C, Wurst W, Prakash N. Dose-Dependent and Subset-Specific Regulation of Midbrain Dopaminergic Neuron Differentiation by LEF1-Mediated WNT1/b-Catenin Signaling. Front Cell Dev Biol 2020; 8:587778. [PMID: 33195246 PMCID: PMC7649324 DOI: 10.3389/fcell.2020.587778] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/01/2020] [Indexed: 01/07/2023] Open
Abstract
The mesodiencephalic dopaminergic (mdDA) neurons, including the nigrostriatal subset that preferentially degenerates in Parkinson’s Disease (PD), strongly depend on an accurately balanced Wingless-type MMTV integration site family member 1 (WNT1)/beta-catenin signaling pathway during their development. Loss of this pathway abolishes the generation of these neurons, whereas excessive WNT1/b-catenin signaling prevents their correct differentiation. The identity of the cells responding to this pathway in the developing mammalian ventral midbrain (VM) as well as the precise progression of WNT/b-catenin action in these cells are still unknown. We show that strong WNT/b-catenin signaling inhibits the differentiation of WNT/b-catenin-responding mdDA progenitors into PITX3+ and TH+ mdDA neurons by repressing the Pitx3 gene in mice. This effect is mediated by RSPO2, a WNT/b-catenin agonist, and lymphoid enhancer binding factor 1 (LEF1), an essential nuclear effector of the WNT/b-catenin pathway, via conserved LEF1/T-cell factor binding sites in the Pitx3 promoter. LEF1 expression is restricted to a caudolateral mdDA progenitor subset that preferentially responds to WNT/b-catenin signaling and gives rise to a fraction of all mdDA neurons. Our data indicate that an attenuation of WNT/b-catenin signaling in mdDA progenitors is essential for their correct differentiation into specific mdDA neuron subsets. This is an important consideration for stem cell-based regenerative therapies and in vitro models of neuropsychiatric diseases.
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Affiliation(s)
- Parivash Nouri
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Sebastian Götz
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Benedict Rauser
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Martin Irmler
- Institute of Experimental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Changgeng Peng
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany.,Advanced Institute of Translational Medicine, The First Rehabilitation Hospital of Shanghai, Tongji University School of Medicine, Tongji University, Shanghai, China
| | - Dietrich Trümbach
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Christian Kempny
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Carina G Lechermeier
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Agnes Bryniok
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Andrea Dlugos
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Ellen Euchner
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Johannes Beckers
- Institute of Experimental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany.,Chair of Experimental Genetics, Technical University of Munich, Munich, Germany.,German Center for Diabetes Research, Neuherberg, Germany
| | - Claude Brodski
- Department of Physiology and Cell Biology, Zlotowski Center for Neuroscience, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Claudia Klümper
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany.,Chair of Developmental Genetics, Helmholtz Zentrum München, Technical University of Munich/Helmholtz Zentrum München, Neuherberg, Germany.,German Center for Neurodegenerative Diseases, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Nilima Prakash
- Laboratory of Applied Genetics and Stem Cell Biology, Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
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4
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Dong X, Kwan KM. Yin Yang 1 is critical for mid-hindbrain neuroepithelium development and involved in cerebellar agenesis. Mol Brain 2020; 13:104. [PMID: 32703236 PMCID: PMC7376712 DOI: 10.1186/s13041-020-00643-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 07/15/2020] [Indexed: 12/14/2022] Open
Abstract
The highly conserved and ubiquitously expressed transcription factor Yin Yang 1 (Yy1), was named after its dual functions of both activating and repressing gene transcription. Yy1 plays complex roles in various fundamental biological processes such as the cell cycle progression, cell proliferation, survival, and differentiation. Patients with dominant Yy1 mutations suffer from central nervous system (CNS) developmental defects. However, the role of Yy1 in mammalian CNS development remains to be fully elucidated. The isthmus organizer locates to the mid-hindbrain (MHB) boundary region and serves as the critical signaling center during midbrain and cerebellar early patterning. To study the function of Yy1 in mesencephalon/ rhombomere 1 (mes/r1) neuroepithelium development, we utilized the tissue-specific Cre-LoxP system and generated a conditional knockout mouse line to inactivate Yy1 in the MHB region. Mice with Yy1 deletion in the mes/r1 region displayed cerebellar agenesis and dorsal midbrain hypoplasia. The Yy1 deleted neuroepithelial cells underwent cell cycle arrest and apoptosis, with the concurrent changes of cell cycle regulatory genes expression, as well as activation of the p53 pathway. Moreover, we found that Yy1 is involved in the transcriptional activation of Wnt1 in neural stem cells. Thus, our work demonstrates the involvement of Yy1 in cerebellar agenesis and the critical function of Yy1 in mouse early MHB neuroepithelium maintenance and development.
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Affiliation(s)
- Xiaonan Dong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Kin Ming Kwan
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR, China. .,Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR, China. .,State Key Laboratory of Agrobiotechnology (CUHK), The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR, China.
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5
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Huang CY, Velmurugan BK, Chen MC, Day CH, Chien WS, Padma VV, Wu HC, Lin TH, Hsu HH, Shen CH. KHC-4 inhibits β-catenin expression in prostate cancer cells. Biotech Histochem 2019; 94:374-380. [PMID: 30819007 DOI: 10.1080/10520295.2019.1574026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
KHC-4 is a 2-phenyl-4-quinolone analogue that exhibits anticancer activity. Aberrant activation of β-catenin signaling contributes to prostate cancer development and progression. Therefore, targeting β-catenin expression could be a useful approach to treating prostate cancer. We found that KHC-4 can inhibit β-catenin expression and its signaling pathway in DU145 prostate cancer cells. Treatment with KHC-4 decreased total β-catenin expression and concomitantly decreased β-catenin levels in both the cytoplasm and nucleus of cells. KHC-4 treatment also inhibited β-catenin expression and that of its target proteins, PI3K, AKT, GSK3β and TBX3. We monitored the stability of β-catenin with the proteasomal inhibitor, MG132, in DU145 cells and found that MG132 reversed KHC-4-induced proteasomal β-catenin degradation. We verified CDK1/β-catenin expression in KHC-4 treated DU145 cells. We found that roscovitine treatment reversed cell proliferation by arresting the cell cycle at the G2/M phase and β-catenin expression caused by KHC-4 treatment. We suggest that KHC-4 inhibits β-catenin signaling in DU145 prostate cancer cells.
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Affiliation(s)
- C-Y Huang
- a Graduate Institute of Basic Medical Science, China Medical University , Taichung , Taiwan.,b Graduate Institute of Chinese Medical Science, China Medical University , Taichung , Taiwan.,c Department of Health and Nutrition Biotechnology, Asia University , Taichung , Taiwan.,d Medical Research Center for Exosomes and Mitochondria Related Diseases, China Medical University Hospital , Taichung , Taiwan
| | - B K Velmurugan
- e Toxicology and Biomedicine Research group, Faculty of Applied Sciences, Ton Duc Thang University , Ho Chi Minh City , Vietnam
| | - M-C Chen
- f Division of Colorectal Surgery, Department of Surgery, Taichung Veterans General Hospital , Taichung , Taiwan
| | - C H Day
- g Department of Nursing, MeiHo University , Pingtung , Taiwan
| | - W-S Chien
- a Graduate Institute of Basic Medical Science, China Medical University , Taichung , Taiwan
| | - V V Padma
- h Department of Biotechnology, Bharathiar University , Coimbatore , India
| | - H-C Wu
- i School of medicine, China Medical University , Taichung , Taiwan
| | - T-H Lin
- j Division of Urology, Buddhist Tzu-Chi General Hospital , Taichung , Taiwan
| | - H-H Hsu
- k Division of Colorectal Surgery, Mackay Memorial Hospital , Taipei , Taiwan
| | - C-H Shen
- c Department of Health and Nutrition Biotechnology, Asia University , Taichung , Taiwan.,l Ditmanson Medical Foundation, Chia-Yi Christian Hospital , Chiayi City , Taiwan
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6
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Brodski C, Blaess S, Partanen J, Prakash N. Crosstalk of Intercellular Signaling Pathways in the Generation of Midbrain Dopaminergic Neurons In Vivo and from Stem Cells. J Dev Biol 2019; 7:jdb7010003. [PMID: 30650592 PMCID: PMC6473842 DOI: 10.3390/jdb7010003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/07/2019] [Accepted: 01/09/2019] [Indexed: 12/25/2022] Open
Abstract
Dopamine-synthesizing neurons located in the mammalian ventral midbrain are at the center stage of biomedical research due to their involvement in severe human neuropsychiatric and neurodegenerative disorders, most prominently Parkinson’s Disease (PD). The induction of midbrain dopaminergic (mDA) neurons depends on two important signaling centers of the mammalian embryo: the ventral midline or floor plate (FP) of the neural tube, and the isthmic organizer (IsO) at the mid-/hindbrain boundary (MHB). Cells located within and close to the FP secrete sonic hedgehog (SHH), and members of the wingless-type MMTV integration site family (WNT1/5A), as well as bone morphogenetic protein (BMP) family. The IsO cells secrete WNT1 and the fibroblast growth factor 8 (FGF8). Accordingly, the FGF8, SHH, WNT, and BMP signaling pathways play crucial roles during the development of the mDA neurons in the mammalian embryo. Moreover, these morphogens are essential for the generation of stem cell-derived mDA neurons, which are critical for the modeling, drug screening, and cell replacement therapy of PD. This review summarizes our current knowledge about the functions and crosstalk of these signaling pathways in mammalian mDA neuron development in vivo and their applications in stem cell-based paradigms for the efficient derivation of these neurons in vitro.
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Affiliation(s)
- Claude Brodski
- Department of Physiology and Cell Biology, Zlotowski Center for Neuroscience, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel.
| | - Sandra Blaess
- Institute of Reconstructive Neurobiology, University of Bonn Medical Center, 53127 Bonn, Germany.
| | - Juha Partanen
- Faculty of Biological and Environmental Sciences, FIN00014-University of Helsinki, P.O. Box 56, Viikinkaari 9, FIN-00014 Helsinki, Finland.
| | - Nilima Prakash
- Department Hamm 2, Hamm-Lippstadt University of Applied Sciences, 59063 Hamm, Germany.
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7
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Chen YF, Velmurugan BK, Wang HL, Tu CC, Che RJ, Chen MC, Jen LB, Vishwanadha VP, Hsu HH, Huang CY. Estrogen and ERα enhanced β-catenin degradation and suppressed its downstream target genes to block the metastatic function of HA22T hepatocellular carcinoma cells via modulating GSK-3β and β-TrCP expression. ENVIRONMENTAL TOXICOLOGY 2017; 32:519-529. [PMID: 26990689 DOI: 10.1002/tox.22256] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
In our previous experiments, we found β-catenin was highly expressed in the tumor area with high invasive ability and poor prognosis. In this study, we have examined the mechanism by which ERα regulates β-catenin expression as well as the metastasis ability of hepatocellular cancer HA22T cells. To identify whether the anticancer effect of estrogen and ERα is mediated through suppression of β-catenin expression, we co-transfected pCMV-β-catenin and ERα into HA22T cells, and determined the cell motility by wound healing, invasion, and migration assays. Results showed that estrogen and/or ERα inhibited β-catenin gene expression and repressed HA22T cell motility demonstrated that similar data was observed in cells expressing the ERα stable clone. Moreover, we examined the protein-protein interaction between ERα and β-catenin by immunostain, co-immunoprecipitation, and Western blotting. E2 enhanced the binding of ERα with β-catenin and then triggered β-catenin to bind with E3 ligase (βTrCP) to promote β-catenin degradation. Finally by employing systematic ChIP studies, we showed ERα can interact directly with the β-catenin promoter region following E2 treatment. All our results reveal that estrogen and ERα blocked metastatic function of HA22T cells by modulating GSK3β and βTrCP expression and further enhanced β-catenin degradation and suppressed its downstream target genes. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 519-529, 2017.
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Affiliation(s)
- Yu-Feng Chen
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
- Section of Cardiology, Yuan Rung Hospital, Yuanlin, Taiwan
| | | | - Hwai-Lee Wang
- Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
| | - Chuan-Chou Tu
- Department of Internal Medicine, Division of Chest Medicine, Armed Force Taichung General Hospital, Taichung, Taiwan
| | - Ray-Jade Che
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ming-Cheng Chen
- Division of Colorectal Surgery, Veterans General Hospital, Taichung, Taiwan
| | - Long-Bin Jen
- Department of Surgery, China Medical University Hospital, Taichung, Taiwan
| | | | - Hsi-Hsien Hsu
- Division of Colorectal Surgery, Mackay Memorial Hospital, Taipei, Taiwan
- Mackay Medicine, Nursing and Management College, Taipei, Taiwan
| | - Chih-Yang Huang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
- Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
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8
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Wang X, Yang L, Wang Q, Guo Y, Li N, Ma M, Zhou B. The neurotoxicity of DE-71: effects on neural development and impairment of serotonergic signaling in zebrafish larvae. J Appl Toxicol 2016; 36:1605-1613. [PMID: 27001416 DOI: 10.1002/jat.3322] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 01/29/2023]
Abstract
The underlying mechanism of polybrominated diphenyl ether (PBDE)-induced neurotoxicity is still a major concern due to its ubiquitous nature and persistence. Here, zebrafish embryos (2 h postfertilization, hpf) were exposed to different concentrations of the commercial PBDE mixture DE-71 (0-100 µg l-1 ) until 120 hpf, and the impact on neural development and serotonergic system was investigated. The in vivo results revealed significantly reduced transcription of genes involved in neurogenesis (fgf8, shha, wnt1), and contents of proteins in neuronal morphogenesis (myelin basic protein, synapsin IIa), suggesting an impairment of neural development in zebrafish embryos. Further results demonstrated a reduction of 5-hydroxytryptamine neuron and a dose-dependent decrease of whole-body serotonin levels, as well as the transcription of genes involved in serotonergic synthesis (tph1, tph2, trhr) and neurotransmission (serta/b, htr1aa/b). In addition, we predicted possible targets of PBDEs by molecular docking, and the results indicated that PBDE congeners showed high binding affinities with fibroblast growth factor 8 other than SHH and HTR1B. Taken together, this study demonstrated that PBDE exposure during embryogenesis could damage neural development and cause impairment of the serotonergic system as secondary effects in the zebrafish larvae. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Xianfeng Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.,University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Lihua Yang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Qiangwei Wang
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, China
| | - Yongyong Guo
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Na Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Mei Ma
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Bingsheng Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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9
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Nouri N, Patel MJ, Joksimovic M, Poulin JF, Anderegg A, Taketo MM, Ma YC, Awatramani R. Excessive Wnt/beta-catenin signaling promotes midbrain floor plate neurogenesis, but results in vacillating dopamine progenitors. Mol Cell Neurosci 2015; 68:131-42. [PMID: 26164566 PMCID: PMC4633300 DOI: 10.1016/j.mcn.2015.07.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 06/30/2015] [Accepted: 07/04/2015] [Indexed: 01/10/2023] Open
Abstract
The floor plate (FP), a ventral midline structure of the developing neural tube, has differential neurogenic capabilities along the anterior-posterior axis. The midbrain FP, unlike the hindbrain and spinal cord floor plate, is highly neurogenic and produces midbrain dopaminergic (mDA) neurons. Canonical Wnt/beta-catenin signaling, at least in part, is thought to account for the difference in neurogenic capability. Removal of beta-catenin results in mDA progenitor specification defects as well as a profound reduction of neurogenesis. To examine the effects of excessive Wnt/beta-catenin signaling on mDA specification and neurogenesis, we have analyzed a model wherein beta-catenin is conditionally stabilized in the Shh+domain. Here, we show that the Foxa2+/Lmx1a+ domain is extended rostrally in mutant embryos, suggesting that canonical Wnt/beta-catenin signaling can drive FP expansion along the rostrocaudal axis. Although excess canonical Wnt/beta-catenin signaling generally promotes neurogenesis at midbrain levels, less tyrosine hydroxylase (Th)+, mDA neurons are generated, particularly impacting the Substantia Nigra pars compacta. This is likely because of improper progenitor specification. Excess canonical Wnt/beta-catenin signaling causes downregulation of net Lmx1b, Shh and Foxa2 levels in mDA progenitors. Moreover, these progenitors assume a mixed identity to that of Lmx1a+/Lmx1b+/Nkx6-1+/Neurog1+ progenitors. We also show by lineage tracing analysis that normally, Neurog1+ progenitors predominantly give rise to Pou4f1+ neurons, but not Th+ neurons. Accordingly, in the mutant embryos, Neurog1+ progenitors at the midline generate ectopic Pou4f1+ neurons at the expense of Th+ mDA neurons. Our study suggests that an optimal dose of Wnt/beta-catenin signaling is critical for proper establishment of the mDA progenitor character. Our findings will impact embryonic stem cell protocols that utilize Wnt pathway reagents to derive mDA neuron models and therapeutics for Parkinson's disease.
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Affiliation(s)
- Navid Nouri
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA.
| | - Meera J Patel
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA; Committee on Neurobiology, University of Chicago, 924 E 57th St. R222, Chicago, IL 60637, USA.
| | - Milan Joksimovic
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA.
| | - Jean-Francois Poulin
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA.
| | - Angela Anderegg
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA.
| | - M Mark Taketo
- Graduate School of Medicine, Kyoto University, Yoshida-Konoé-cho, Sakyo, Kyoto 606-8501, Japan.
| | - Yong-Chao Ma
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Children's Hospital of Chicago Research Center, 2430 North Halsted Street, Room C321, Chicago, IL 60614, USA.
| | - Rajeshwar Awatramani
- Northwestern University, Feinberg Medical School, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Bldg., 303 E Superior Street, Chicago, IL 60611, USA.
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Anderegg A, Lin HP, Chen JA, Caronia-Brown G, Cherepanova N, Yun B, Joksimovic M, Rock J, Harfe BD, Johnson R, Awatramani R. An Lmx1b-miR135a2 regulatory circuit modulates Wnt1/Wnt signaling and determines the size of the midbrain dopaminergic progenitor pool. PLoS Genet 2013; 9:e1003973. [PMID: 24348261 PMCID: PMC3861205 DOI: 10.1371/journal.pgen.1003973] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 10/09/2013] [Indexed: 11/19/2022] Open
Abstract
MicroRNAs regulate gene expression in diverse physiological scenarios. Their role in the control of morphogen related signaling pathways has been less studied, particularly in the context of embryonic Central Nervous System (CNS) development. Here, we uncover a role for microRNAs in limiting the spatiotemporal range of morphogen expression and function. Wnt1 is a key morphogen in the embryonic midbrain, and directs proliferation, survival, patterning and neurogenesis. We reveal an autoregulatory negative feedback loop between the transcription factor Lmx1b and a newly characterized microRNA, miR135a2, which modulates the extent of Wnt1/Wnt signaling and the size of the dopamine progenitor domain. Conditional gain of function studies reveal that Lmx1b promotes Wnt1/Wnt signaling, and thereby increases midbrain size and dopamine progenitor allocation. Conditional removal of Lmx1b has the opposite effect, in that expansion of the dopamine progenitor domain is severely compromised. Next, we provide evidence that microRNAs are involved in restricting dopamine progenitor allocation. Conditional loss of Dicer1 in embryonic stem cells (ESCs) results in expanded Lmx1a/b+ progenitors. In contrast, forced elevation of miR135a2 during an early window in vivo phenocopies the Lmx1b conditional knockout. When En1::Cre, but not Shh::Cre or Nes::Cre, is used for recombination, the expansion of Lmx1a/b+ progenitors is selectively reduced. Bioinformatics and luciferase assay data suggests that miR135a2 targets Lmx1b and many genes in the Wnt signaling pathway, including Ccnd1, Gsk3b, and Tcf7l2. Consistent with this, we demonstrate that this mutant displays reductions in the size of the Lmx1b/Wnt1 domain and range of canonical Wnt signaling. We posit that microRNA modulation of the Lmx1b/Wnt axis in the early midbrain/isthmus could determine midbrain size and allocation of dopamine progenitors. Since canonical Wnt activity has recently been recognized as a key ingredient for programming ESCs towards a dopaminergic fate in vitro, these studies could impact the rational design of such protocols.
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Affiliation(s)
- Angela Anderegg
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Hsin-Pin Lin
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Jun-An Chen
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Giuliana Caronia-Brown
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Natalya Cherepanova
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Beth Yun
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Milan Joksimovic
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Jason Rock
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Brian D. Harfe
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Randy Johnson
- Department of Biochemistry and Molecular Biology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Rajeshwar Awatramani
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
- * E-mail:
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Joksimovic M, Awatramani R. Wnt/ -catenin signaling in midbrain dopaminergic neuron specification and neurogenesis. J Mol Cell Biol 2013; 6:27-33. [DOI: 10.1093/jmcb/mjt043] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Midbrain dopaminergic neurons: a review of the molecular circuitry that regulates their development. Dev Biol 2013; 379:123-38. [PMID: 23603197 DOI: 10.1016/j.ydbio.2013.04.014] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 03/27/2013] [Accepted: 04/12/2013] [Indexed: 12/21/2022]
Abstract
Dopaminergic (DA) neurons of the ventral midbrain (VM) play vital roles in the regulation of voluntary movement, emotion and reward. They are divided into the A8, A9 and A10 subgroups. The development of the A9 group of DA neurons is an area of intense investigation to aid the generation of these neurons from stem cell sources for cell transplantation approaches to Parkinson's disease (PD). This review discusses the molecular processes that are involved in the identity, specification, maturation, target innervation and survival of VM DA neurons during development. The complex molecular interactions of a number of genetic pathways are outlined, as well as recent advances in the mechanisms that regulate subset identity within the VM DA neuronal pool. A thorough understanding of the cellular and molecular mechanisms involved in the development of VM DA neurons will greatly facilitate the use of cell replacement therapy for the treatment of PD.
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Wnt5a cooperates with canonical Wnts to generate midbrain dopaminergic neurons in vivo and in stem cells. Proc Natl Acad Sci U S A 2013; 110:E602-10. [PMID: 23324743 DOI: 10.1073/pnas.1208524110] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Wnts are a family of secreted proteins that regulate multiple steps of neural development and stem cell differentiation. Two of them, Wnt1 and Wnt5a, activate distinct branches of Wnt signaling and individually regulate different aspects of midbrain dopaminergic (DA) neuron development. However, several of their functions and interactions remain to be elucidated. Here, we report that loss of Wnt1 results in loss of Lmx1a and Ngn2 expression, as well as agenesis of DA neurons in the midbrain floor plate. Remarkably, a few ectopic DA neurons still emerge in the basal plate of Wnt1(-/-) mice, where Lmx1a is ectopically expressed. These results indicate that Wnt1 orchestrates DA specification and neurogenesis in vivo. Analysis of Wnt1(-/-);Wnt5a(-/-) mice revealed a greater loss of Nurr1(+) cells and DA neurons than in single mutants, indicating that Wnt1 and Wnt5a interact genetically and cooperate to promote midbrain DA neuron development in vivo. Our results unravel a functional interaction between Wnt1 and Wnt5a resulting in enhanced DA neurogenesis. Taking advantage of these findings, we have developed an application of Wnts to improve the generation of midbrain DA neurons from neural and embryonic stem cells. We thus show that coordinated Wnt actions promote DA neuron development in vivo and in stem cells and suggest that coordinated Wnt administration can be used to improve DA differentiation of stem cells and the development of stem cell-based therapies for Parkinson's disease.
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Joksimovic M, Patel M, Taketo MM, Johnson R, Awatramani R. Ectopic Wnt/beta-catenin signaling induces neurogenesis in the spinal cord and hindbrain floor plate. PLoS One 2012; 7:e30266. [PMID: 22276170 PMCID: PMC3261891 DOI: 10.1371/journal.pone.0030266] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 12/12/2011] [Indexed: 01/08/2023] Open
Abstract
The most ventral structure of the developing neural tube, the floor plate (FP), differs in neurogenic capacity along the neuraxis. The FP is largely non-neurogenic at the hindbrain and spinal cord levels, but generates large numbers of dopamine (mDA) neurons at the midbrain levels. Wnt1, and other Wnts are expressed in the ventral midbrain, and Wnt/beta catenin signaling can at least in part account for the difference in neurogenic capacity of the FP between midbrain and hindbrain levels. To further develop the hypothesis that canonical Wnt signaling promotes mDA specification and FP neurogenesis, we have generated a model wherein beta–catenin is conditionally stabilized throughout the FP. Here, we unambiguously show by fate mapping FP cells in this mutant, that the hindbrain and spinal cord FP are rendered highly neurogenic, producing large numbers of neurons. We reveal that a neurogenic hindbrain FP results in the altered settling pattern of neighboring precerebellar neuronal clusters. Moreover, in this mutant, mDA progenitor markers are induced throughout the rostrocaudal axis of the hindbrain FP, although TH+ mDA neurons are produced only in the rostral aspect of rhombomere (r)1. This is, at least in part, due to depressed Lmx1b levels by Wnt/beta catenin signaling; indeed, when Lmx1b levels are restored in this mutant, mDA are observed not only in rostral r1, but also at more caudal axial levels in the hindbrain, but not in the spinal cord. Taken together, these data elucidate both patterning and neurogenic functions of Wnt/beta catenin signaling in the FP, and thereby add to our understanding of the molecular logic of mDA specification and neurogenesis.
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Affiliation(s)
- Milan Joksimovic
- Department of Neurology and Center for Genetic Medicine, Feinberg Medical School, Northwestern University, Chicago, Illinois, United States of America
| | - Meera Patel
- Department of Neurology and Center for Genetic Medicine, Feinberg Medical School, Northwestern University, Chicago, Illinois, United States of America
| | - Makoto Mark Taketo
- Department of Pharmacology, Graduate School of Medicine, Kyoto University, Yoshida-Konoé-cho, Sakyo, Kyoto, Japan
| | - Randy Johnson
- Department of Biochemistry and Molecular Biology, University of Texas, M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Rajeshwar Awatramani
- Department of Neurology and Center for Genetic Medicine, Feinberg Medical School, Northwestern University, Chicago, Illinois, United States of America
- * E-mail:
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Chilov D, Sinjushina N, Rita H, Taketo MM, Mäkelä TP, Partanen J. Phosphorylated β-catenin localizes to centrosomes of neuronal progenitors and is required for cell polarity and neurogenesis in developing midbrain. Dev Biol 2011; 357:259-68. [DOI: 10.1016/j.ydbio.2011.06.029] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 05/16/2011] [Accepted: 06/21/2011] [Indexed: 10/18/2022]
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En1 and Wnt signaling in midbrain dopaminergic neuronal development. Neural Dev 2011; 6:23. [PMID: 21569278 PMCID: PMC3104484 DOI: 10.1186/1749-8104-6-23] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 05/10/2011] [Indexed: 12/21/2022] Open
Abstract
Dopaminergic neurons of the ventral mesodiencephalon are affected in significant health disorders such as Parkinson's disease, schizophrenia, and addiction. The ultimate goal of current research endeavors is to improve the clinical treatment of such disorders, such as providing a protocol for cell replacement therapy in Parkinson's disease that will successfully promote the specific differentiation of a stem cell into a dopaminergic neuronal phenotype. Decades of research on the developmental mechanisms of the mesodiencephalic dopaminergic (mdDA) system have led to the identification of many signaling pathways and transcription factors critical in its development. The unraveling of these pathways will help fill in the pieces of the puzzle that today dominates neurodevelopment research: how to make and maintain a mdDA neuron. In the present review, we provide an overview of the mdDA system, the processes and signaling molecules involved in its genesis, with a focus on the transcription factor En1 and the canonical Wnt pathway, highlighting recent findings on their relevance--and interplay--in the development and maintenance of the mdDA system.
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