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Van Lent J, Prior R, Pérez Siles G, Cutrupi AN, Kennerson ML, Vangansewinkel T, Wolfs E, Mukherjee-Clavin B, Nevin Z, Judge L, Conklin B, Tyynismaa H, Clark AJ, Bennett DL, Van Den Bosch L, Saporta M, Timmerman V. Advances and challenges in modeling inherited peripheral neuropathies using iPSCs. Exp Mol Med 2024:10.1038/s12276-024-01250-x. [PMID: 38825644 DOI: 10.1038/s12276-024-01250-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/21/2024] [Accepted: 03/18/2024] [Indexed: 06/04/2024] Open
Abstract
Inherited peripheral neuropathies (IPNs) are a group of diseases associated with mutations in various genes with fundamental roles in the development and function of peripheral nerves. Over the past 10 years, significant advances in identifying molecular disease mechanisms underlying axonal and myelin degeneration, acquired from cellular biology studies and transgenic fly and rodent models, have facilitated the development of promising treatment strategies. However, no clinical treatment has emerged to date. This lack of treatment highlights the urgent need for more biologically and clinically relevant models recapitulating IPNs. For both neurodevelopmental and neurodegenerative diseases, patient-specific induced pluripotent stem cells (iPSCs) are a particularly powerful platform for disease modeling and preclinical studies. In this review, we provide an update on different in vitro human cellular IPN models, including traditional two-dimensional monoculture iPSC derivatives, and recent advances in more complex human iPSC-based systems using microfluidic chips, organoids, and assembloids.
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Affiliation(s)
- Jonas Van Lent
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, University of Antwerp, 2610, Antwerp, Belgium
- Laboratory of Neuromuscular Pathology, Institute Born Bunge, 2610, Antwerp, Belgium
- Institute of Oncology Research (IOR), BIOS+, 6500, Bellinzona, Switzerland
- Università della Svizzera Italiana, 6900, Lugano, Switzerland
| | - Robert Prior
- Universitätsklinikum Bonn (UKB), University of Bonn, Bonn, Germany
| | - Gonzalo Pérez Siles
- Northcott Neuroscience Laboratory, ANZAC Research Institute Sydney Local Health District and Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Anthony N Cutrupi
- Northcott Neuroscience Laboratory, ANZAC Research Institute Sydney Local Health District and Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Marina L Kennerson
- Northcott Neuroscience Laboratory, ANZAC Research Institute Sydney Local Health District and Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
- Molecular Medicine Laboratory, Concord Hospital, Sydney, NSW, Australia
| | - Tim Vangansewinkel
- UHasselt - Hasselt University, BIOMED, Laboratory for Functional Imaging and Research on Stem Cells (FIERCE Lab), Agoralaan, 3590, Diepenbeek, Belgium
- VIB-Center for Brain and Disease Research, Laboratory of Neurobiology, 3000, Leuven, Belgium
| | - Esther Wolfs
- UHasselt - Hasselt University, BIOMED, Laboratory for Functional Imaging and Research on Stem Cells (FIERCE Lab), Agoralaan, 3590, Diepenbeek, Belgium
| | | | | | - Luke Judge
- Gladstone Institutes, San Francisco, CA, USA
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA
| | - Bruce Conklin
- Gladstone Institutes, San Francisco, CA, USA
- Department of Ophthalmology, University of California, San Francisco, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Henna Tyynismaa
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, 00290, Helsinki, Finland
| | - Alex J Clark
- Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - David L Bennett
- Nuffield Department of Clinical Neuroscience, Oxford University, Oxford, UK
| | - Ludo Van Den Bosch
- VIB-Center for Brain and Disease Research, Laboratory of Neurobiology, 3000, Leuven, Belgium
- Department of Neurosciences, Experimental Neurology, and Leuven Brain Institute, KU Leuven-University of Leuven, 3000, Leuven, Belgium
| | - Mario Saporta
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Vincent Timmerman
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, University of Antwerp, 2610, Antwerp, Belgium.
- Laboratory of Neuromuscular Pathology, Institute Born Bunge, 2610, Antwerp, Belgium.
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Martinez JL, Piciw JG, Crockett M, Sorci IA, Makwana N, Sirois CL, Giffin-Rao Y, Bhattacharyya A. Transcriptional consequences of trisomy 21 on neural induction. Front Cell Neurosci 2024; 18:1341141. [PMID: 38357436 PMCID: PMC10865501 DOI: 10.3389/fncel.2024.1341141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 01/08/2024] [Indexed: 02/16/2024] Open
Abstract
Introduction Down syndrome, caused by trisomy 21, is a complex developmental disorder associated with intellectual disability and reduced growth of multiple organs. Structural pathologies are present at birth, reflecting embryonic origins. A fundamental unanswered question is how an extra copy of human chromosome 21 contributes to organ-specific pathologies that characterize individuals with Down syndrome, and, relevant to the hallmark intellectual disability in Down syndrome, how trisomy 21 affects neural development. We tested the hypothesis that trisomy 21 exerts effects on human neural development as early as neural induction. Methods Bulk RNA sequencing was performed on isogenic trisomy 21 and euploid human induced pluripotent stem cells (iPSCs) at successive stages of neural induction: embryoid bodies at Day 6, early neuroectoderm at Day 10, and differentiated neuroectoderm at Day 17. Results Gene expression analysis revealed over 1,300 differentially expressed genes in trisomy 21 cells along the differentiation pathway compared to euploid controls. Less than 5% of the gene expression changes included upregulated chromosome 21 encoded genes at every timepoint. Genes involved in specific growth factor signaling pathways (WNT and Notch), metabolism (including oxidative stress), and extracellular matrix were altered in trisomy 21 cells. Further analysis uncovered heterochronic expression of genes. Conclusion Trisomy 21 impacts discrete developmental pathways at the earliest stages of neural development. The results suggest that metabolic dysfunction arises early in embryogenesis in trisomy 21 and may affect development and function more broadly.
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Affiliation(s)
- José L. Martinez
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
- Cellular and Molecular Biology Graduate Program, University of Wisconsin-Madison, Madison, WI, United States
| | - Jennifer G. Piciw
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
- Cellular and Molecular Biology Graduate Program, University of Wisconsin-Madison, Madison, WI, United States
- Medical Scientist Training Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
| | - Madeline Crockett
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Isabella A. Sorci
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Nikunj Makwana
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Carissa L. Sirois
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
| | | | - Anita Bhattacharyya
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
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Li CY, Liu YJ, Tao F, Chen RY, Shi JJ, Lu JF, Yang GJ, Chen J. Lysine-specific demethylase 7A (KDM7A): A potential target for disease therapy. Biochem Pharmacol 2023; 216:115799. [PMID: 37696455 DOI: 10.1016/j.bcp.2023.115799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/13/2023]
Abstract
Histone demethylation is a kind of epigenetic modification mediated by a variety of enzymes and participates in regulating multiple physiological and pathological events. Lysine-specific demethylase 7A is a kind of α-ketoglutarate- and Fe(II)-dependent demethylase belonging to the PHF2/8 subfamily of the JmjC demethylases. KDM7A is mainly localized in the nucleus and contributes to transcriptional activation via removing mono- and di-methyl groups from the lysine residues 9 and 27 of Histone H3. Mounting studies support that KDM7A is not only necessary for normal embryonic, neural, and skeletal development, but also associated with cancer, inflammation, osteoporosis, and other diseases. Herein, the structure of KDM7A is described by comparing the similarities and differences of its amino acid sequences of KDM7A and other Histone demethylases; the functions of KDM7A in homeostasis and dyshomeostasis are summarized via documenting its content and related signaling; the currently known KDM7A-specific inhibitors and their structural relationship are listed based on their structure optimization and pharmacological activities; and the challenges and opportunities in exploring functions and developing targeted agents of KDM7A are also prospected via presenting encountered problems and potential solutions, which will provide an insight in functional exploration and drug discovery for KDM7A-related diseases.
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Affiliation(s)
- Chang-Yun Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Yan-Jun Liu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Fan Tao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Ru-Yi Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Jin-Jin Shi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Jian-Fei Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Guan-Jun Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China.
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, Zhejiang, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China.
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Han XX, Cai C, Yu LM, Wang M, Yang W, Hu DY, Ren J, Zhu LY, Deng JJ, Chen QQ, He H, Gao Z. Glioma stem cells and neural stem cells respond differently to BMP4 signaling. CELL REGENERATION 2022; 11:36. [DOI: 10.1186/s13619-022-00136-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 08/09/2022] [Indexed: 11/06/2022]
Abstract
AbstractMalignant glioma is a highly heterogeneous and invasive primary brain tumor characterized by high recurrence rates, resistance to combined therapy, and dismal prognosis. Glioma stem cells (GSCs) are likely responsible for tumor progression, resistance to therapy, recurrence, and poor prognosis owing to their high self-renewal and tumorigenic potential. As a family member of BMP signaling, bone morphogenetic protein4 (BMP4) has been reported to induce the differentiation of GSCs and neural stem cells (NSCs). However, the molecular mechanisms underlying the BMP4-mediated effects in these two cell types are unclear. In this study, we treated hGSCs and hNSCs with BMP4 and compared the phenotypic and transcriptional changes between these two cell types. Phenotypically, we found that the growth of hGSCs was greatly inhibited by BMP4, but the same treatment only increased the cell size of hNSCs. While the RNA sequencing results showed that BMP4 treatment evoked significantly transcriptional changes in both hGSCs and hNSCs, the profiles of differentially expressed genes were distinct between the two groups. A gene set that specifically targeted the proliferation and differentiation of hGSCs but not hNSCs was enriched and then validated in hGSC culture. Our results suggested that hGSCs and hNSCs responded differently to BMP4 stimulation. Understanding and investigating different responses between hGSCs and hNSCs will benefit finding partner factors working together with BMP4 to further suppress GSCs proliferation and stemness without disturbing NSCs.
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Su CJ, Murugan A, Linton JM, Yeluri A, Bois J, Klumpe H, Langley MA, Antebi YE, Elowitz MB. Ligand-receptor promiscuity enables cellular addressing. Cell Syst 2022; 13:408-425.e12. [PMID: 35421362 PMCID: PMC10897978 DOI: 10.1016/j.cels.2022.03.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 11/08/2021] [Accepted: 03/16/2022] [Indexed: 12/24/2022]
Abstract
In multicellular organisms, secreted ligands selectively activate, or "address," specific target cell populations to control cell fate decision-making and other processes. Key cell-cell communication pathways use multiple promiscuously interacting ligands and receptors, provoking the question of how addressing specificity can emerge from molecular promiscuity. To investigate this issue, we developed a general mathematical modeling framework based on the bone morphogenetic protein (BMP) pathway architecture. We find that promiscuously interacting ligand-receptor systems allow a small number of ligands, acting in combinations, to address a larger number of individual cell types, defined by their receptor expression profiles. Promiscuous systems outperform seemingly more specific one-to-one signaling architectures in addressing capability. Combinatorial addressing extends to groups of cell types, is robust to receptor expression noise, grows more powerful with increases in the number of receptor variants, and is maximized by specific biochemical parameter relationships. Together, these results identify design principles governing cellular addressing by ligand combinations.
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Affiliation(s)
- Christina J Su
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Arvind Murugan
- Department of Physics, University of Chicago, Chicago, IL 60637, USA
| | - James M Linton
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Akshay Yeluri
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Justin Bois
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Heidi Klumpe
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Matthew A Langley
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Yaron E Antebi
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Michael B Elowitz
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA; Department of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.
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Isla-Magrané H, Veiga A, García-Arumí J, Duarri A. Multiocular organoids from human induced pluripotent stem cells displayed retinal, corneal, and retinal pigment epithelium lineages. Stem Cell Res Ther 2021; 12:581. [PMID: 34809716 PMCID: PMC8607587 DOI: 10.1186/s13287-021-02651-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 11/05/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Recently, great efforts have been made to design protocols for obtaining ocular cells from human stem cells to model diseases or for regenerative purposes. Current protocols generally focus on isolating retinal cells, retinal pigment epithelium (RPE), or corneal cells and fail to recapitulate the complexity of the tissue during eye development. Here, the generation of more advanced in vitro multiocular organoids from human induced pluripotent stem cells (hiPSCs) is demonstrated. METHODS A 2-step method was established to first obtain self-organized multizone ocular progenitor cells (mzOPCs) from 2D hiPSC cultures within three weeks. Then, after the cells were manually isolated and grown in suspension, 3D multiocular organoids were generated to model important cellular features of developing eyes. RESULTS In the 2D culture, self-formed mzOPCs spanned the neuroectoderm, surface ectoderm, neural crest, and RPE, mimicking early stages of eye development. After lifting, mzOPCs developed into different 3D multiocular organoids composed of multiple cell lineages including RPE, retina, and cornea, and interactions between the different cell types and regions of the eye system were observed. Within these organoids, the retinal regions exhibited correct layering and contained all major retinal cell subtypes as well as retinal morphological cues, whereas the corneal regions closely resembled the transparent ocular-surface epithelium and contained of corneal, limbal, and conjunctival epithelial cells. The arrangement of RPE cells also formed organoids composed of polarized pigmented epithelial cells at the surface that were completely filled with collagen matrix. CONCLUSIONS This approach clearly demonstrated the advantages of the combined 2D-3D construction tissue model as it provided a more ocular native-like cellular environment than that of previous models. In this complex preparations, multiocular organoids may be used to model the crosstalk between different cell types in eye development and disease.
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Affiliation(s)
- Helena Isla-Magrané
- Ophthalmology Research Group, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Anna Veiga
- Regenerative Medicine Program IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - José García-Arumí
- Ophthalmology Research Group, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain
- Department of Ophthalmology, Vall d'Hebron Hospital Universitari, Barcelona, Spain
- Department of Ophthalmology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Anna Duarri
- Ophthalmology Research Group, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.
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Fralish Z, Lotz EM, Chavez T, Khodabukus A, Bursac N. Neuromuscular Development and Disease: Learning From in vitro and in vivo Models. Front Cell Dev Biol 2021; 9:764732. [PMID: 34778273 PMCID: PMC8579029 DOI: 10.3389/fcell.2021.764732] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 10/06/2021] [Indexed: 01/02/2023] Open
Abstract
The neuromuscular junction (NMJ) is a specialized cholinergic synaptic interface between a motor neuron and a skeletal muscle fiber that translates presynaptic electrical impulses into motor function. NMJ formation and maintenance require tightly regulated signaling and cellular communication among motor neurons, myogenic cells, and Schwann cells. Neuromuscular diseases (NMDs) can result in loss of NMJ function and motor input leading to paralysis or even death. Although small animal models have been instrumental in advancing our understanding of the NMJ structure and function, the complexities of studying this multi-tissue system in vivo and poor clinical outcomes of candidate therapies developed in small animal models has driven the need for in vitro models of functional human NMJ to complement animal studies. In this review, we discuss prevailing models of NMDs and highlight the current progress and ongoing challenges in developing human iPSC-derived (hiPSC) 3D cell culture models of functional NMJs. We first review in vivo development of motor neurons, skeletal muscle, Schwann cells, and the NMJ alongside current methods for directing the differentiation of relevant cell types from hiPSCs. We further compare the efficacy of modeling NMDs in animals and human cell culture systems in the context of five NMDs: amyotrophic lateral sclerosis, myasthenia gravis, Duchenne muscular dystrophy, myotonic dystrophy, and Pompe disease. Finally, we discuss further work necessary for hiPSC-derived NMJ models to function as effective personalized NMD platforms.
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Affiliation(s)
- Zachary Fralish
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Ethan M Lotz
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Taylor Chavez
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Alastair Khodabukus
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Nenad Bursac
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
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Zhu H, Sun T, Wang Y, Wang T, Ma C, Wang C, Liu C, Guo Y. [Directed differentiation of porcine induced pluripotent stem cells into forebrain GABAergic neuron progenitors]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:820-827. [PMID: 34238733 DOI: 10.12122/j.issn.1673-4254.2021.06.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To establish an efficient protocol for directed differentiation of miniature-swine induced pluripotent stem cells (iPSCs) into GABAergic progenitors in a chemically defined system. OBJECTIVE We adopted a two-stage protocol for inducing the differentiation of porcine iPSCs. In the first stage, embryoid bodies (EBs) derived from porcine iPSCs after 3 days of suspension culture were induced in neural induction medium (containing SB431542, DMH1 and FGF2) till day 12 to differentiate into primitive neuroepithelia cells (NECs). In the second stage, the primitive NECs were induced in neural induction medium (containing Pur and B27) to obtain neural rosettes, which further differentiated into GABAergic neuron progenitors on day 21. After labeling with CM-DiI, the progenitor cells were stereotactically transplanted into the substantia nigra (SN) of 6-OHDA-lesioned PD model rats, and the cell survival, migration and differentiation in vivo were observed. OBJECTIVE Porcine iPSCs could be passaged stably on the feeder cell layer and expressed the pluripotent stem cell markers OCT4, Nanog, SSEA1and TRA-160. Karyotype analysis demonstrated the absence of contamination by cells from other species. On day 12 of induced differentiation, the cells formed adherent colonies containing NECs in the form of neural rosettes, which expressed the neuroepithelial markers PAX6, SOX2 and Nestin and the neurite marker beta Ⅲ Tubulin (Tuj1). After induction for 21 days, the NECs differentiated into GABAergic neural progenitors highly expressing NKX2.1 and FOXG1. Eight weeks after transplantation, the iPSCs-iGABA progeniters survived in the striatum of the PD rats, where they differentiate into GABAergic neurons and TH+ neurons and significantly improved dyskinesia of the rats. OBJECTIVE The miniature-swine iPSCsderived GABA progenitors may serve as promising donor cells for neural grafting for treatment of neurodegenerative diseases.
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Affiliation(s)
- H Zhu
- School of Laboratory Medicine Bengbu Medical College, Bengbu 233000, China
| | - T Sun
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - Y Wang
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - T Wang
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - C Ma
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - C Wang
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - C Liu
- School of Life Sciences, Bengbu Medical College, Bengbu 233000, China
| | - Y Guo
- School of Laboratory Medicine Bengbu Medical College, Bengbu 233000, China
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Embryonic periventricular endothelial cells demonstrate a unique pro-neurodevelopment and anti-inflammatory gene signature. Sci Rep 2020; 10:20393. [PMID: 33230288 PMCID: PMC7683543 DOI: 10.1038/s41598-020-77297-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/02/2020] [Indexed: 01/08/2023] Open
Abstract
Brain embryonic periventricular endothelial cells (PVEC) crosstalk with neural progenitor cells (NPC) promoting mutual proliferation, formation of tubular-like structures in the former and maintenance of stemness in the latter. To better characterize this interaction, we conducted a comparative transcriptome analysis of mouse PVEC vs. adult brain endothelial cells (ABEC) in mono-culture or NPC co-culture. We identified > 6000 differentially expressed genes (DEG), regardless of culture condition. PVEC exhibited a 30-fold greater response to NPC than ABEC (411 vs. 13 DEG). Gene Ontology (GO) analysis of DEG that were higher or lower in PVEC vs. ABEC identified "Nervous system development" and "Response to Stress" as the top significantly different biological process, respectively. Enrichment in canonical pathways included HIF1A, FGF/stemness, WNT signaling, interferon signaling and complement. Solute carriers (SLC) and ABC transporters represented an important subset of DEG, underscoring PVEC's implication in blood-brain barrier formation and maintenance of nutrient-rich/non-toxic environment. Our work characterizes the gene signature of PVEC and their important partnership with NPC, underpinning their unique role in maintaining a healthy neurovascular niche, and in supporting brain development. This information may pave the way for additional studies to explore their therapeutic potential in neuro-degenerative diseases, such as Alzheimer's and Parkinson's disease.
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10
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Zhao S, Duan K, Ai Z, Niu B, Chen Y, Kong R, Li T. Generation of cortical neurons through large-scale expanding neuroepithelial stem cell from human pluripotent stem cells. Stem Cell Res Ther 2020; 11:431. [PMID: 33008480 PMCID: PMC7532602 DOI: 10.1186/s13287-020-01939-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/22/2020] [Accepted: 09/17/2020] [Indexed: 02/08/2023] Open
Abstract
Background Considerable progress has been made in converting human pluripotent stem cells (hPSCs) into cortical neurons for disease modeling and regenerative medicine. However, these procedures are hard to provide sufficient cells for their applications. Using a combination of small-molecules and growth factors, we previously identified one condition which can rapidly induce hPSCs into neuroepithelial stem cells (NESCs). Here, we developed a scalable suspension culture system, which largely yields high-quality NESC-spheres and subsequent cortical neurons. Methods The NESC medium was first optimized, and the suspension culture system was then enlarged from plates to stirred bioreactors for large-scale production of NESC-spheres by a stirring speed of 60 rpm. During the expansion, the quality of NESC-spheres was evaluated. The differentiation potential of NESC-spheres into cortical neurons was demonstrated by removing bFGF and two pathway inhibitors from the NESC medium. Cellular immunofluorescence staining, global transcriptome, and single-cell RNA sequencing analysis were used to identify the characteristics, identities, purities, or homogeneities of NESC-spheres or their differentiated cells, respectively. Results The optimized culture system is more conducive to large-scale suspension production of NESCs. These largely expanded NESC-spheres maintain unlimited self-renewal ability and NESC state by retaining their uniform sizes, high cell vitalities, and robust expansion abilities. After long-term expansion, NESC-spheres preserve high purity, homogeneity, and normal diploid karyotype. These expanded NESC-spheres on a large scale have strong differentiation potential and effectively produce mature cortical neurons. Conclusions We developed a serum-free, defined, and low-cost culture system for large-scale expansion of NESCs in stirred suspension bioreactors. The stable and controllable 3D system supports long-term expansion of high-quality and homogeneous NESC-spheres. These NESC-spheres can be used to efficiently give rise to cortical neurons for cell therapy, disease modeling, and drug screening in future.
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Affiliation(s)
- Shumei Zhao
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Kui Duan
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Zongyong Ai
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Baohua Niu
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Yanying Chen
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Ruize Kong
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Tianqing Li
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China. .,Xi'an ChaoYue Stem Cell Co, Ltd, Xi'an, China.
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11
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Sivitilli AA, Gosio JT, Ghoshal B, Evstratova A, Trcka D, Ghiasi P, Hernandez JJ, Beaulieu JM, Wrana JL, Attisano L. Robust production of uniform human cerebral organoids from pluripotent stem cells. Life Sci Alliance 2020; 3:3/5/e202000707. [PMID: 32303588 PMCID: PMC7167289 DOI: 10.26508/lsa.202000707] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/03/2020] [Accepted: 04/06/2020] [Indexed: 12/20/2022] Open
Abstract
Human cerebral organoid (hCO) models offer the opportunity to understand fundamental processes underlying human-specific cortical development and pathophysiology in an experimentally tractable system. Although diverse methods to generate brain organoids have been developed, a major challenge has been the production of organoids with reproducible cell type heterogeneity and macroscopic morphology. Here, we have directly addressed this problem by establishing a robust production pipeline to generate morphologically consistent hCOs and achieve a success rate of >80%. These hCOs include both a radial glial stem cell compartment and electrophysiologically competent mature neurons. Moreover, we show using immunofluorescence microscopy and single-cell profiling that individual organoids display reproducible cell type compositions that are conserved upon extended culture. We expect that application of this method will provide new insights into brain development and disease processes.
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Affiliation(s)
- Adam A Sivitilli
- Department of Biochemistry, University of Toronto, Toronto, Canada.,Donnelly Centre, University of Toronto, Toronto, Canada
| | - Jessica T Gosio
- Department of Molecular Genetics, University of Toronto, Toronto, Canada.,Center for Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Bibaswan Ghoshal
- Center for Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Alesya Evstratova
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada
| | - Daniel Trcka
- Department of Molecular Genetics, University of Toronto, Toronto, Canada.,Center for Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Parisa Ghiasi
- Department of Biochemistry, University of Toronto, Toronto, Canada.,Donnelly Centre, University of Toronto, Toronto, Canada
| | - J Javier Hernandez
- Department of Molecular Genetics, University of Toronto, Toronto, Canada.,Center for Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Jean Martin Beaulieu
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada
| | - Jeffrey L Wrana
- Department of Molecular Genetics, University of Toronto, Toronto, Canada.,Center for Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Liliana Attisano
- Department of Biochemistry, University of Toronto, Toronto, Canada .,Donnelly Centre, University of Toronto, Toronto, Canada
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12
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Gamm DM, Clark E, Capowski EE, Singh R. The Role of FGF9 in the Production of Neural Retina and RPE in a Pluripotent Stem Cell Model of Early Human Retinal Development. Am J Ophthalmol 2019; 206:113-131. [PMID: 31078532 DOI: 10.1016/j.ajo.2019.04.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 04/11/2019] [Accepted: 04/18/2019] [Indexed: 12/20/2022]
Abstract
PURPOSE To investigate the role of fibroblast growth factors (FGFs) in the production of neural retina (NR) and retinal pigmented epithelium (RPE) in a human pluripotent stem cell model of early retinal development. METHODS Human induced pluripotent stem cell (hiPSC) lines from an individual with microphthalmia caused by a functional null mutation (R200Q) in visual system homeobox 2 (VSX2), a transcription factor involved in early NR progenitor cell (NRPC) production, and a normal sibling were differentiated along the retinal and forebrain lineages using an established protocol. Quantitative and global gene expression analyses (microarray and RNAseq) were used to investigate endogenous FGF expression profiles in these cultures over time. Based on these results, mutant and control hiPSC cultures were treated exogenously with selected FGFs and subjected to gene and protein expression analyses to determine their effects on RPE and NR production. RESULTS We found that FGF9 and FGF19 were selectively increased in early hiPSC-derived optic vesicles (OVs) when compared to isogenic cultures of hiPSC-derived forebrain neurospheres. Furthermore, these same FGFs were downregulated over time in (R200Q)VSX2 hiPSC-OVs relative to sibling control hiPSC-OVs. Interestingly, long-term supplementation with FGF9, but not FGF19, partially rescued the mutant retinal phenotype of the (R200Q)VSX2 hiPSC-OV model. However, antagonizing FGF9 in wild-type control hiPSCs did not alter OV development. CONCLUSIONS Our results show that FGF9 acts in concert with VSX2 to promote NR differentiation in hiPSC-OVs and has potential to be used to manipulate early retinogenesis and mitigate ocular defects caused by functional loss of VSX2 activity. NOTE: Publication of this article is sponsored by the American Ophthalmological Society.
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Affiliation(s)
- David M Gamm
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, Wisconsin, USA; Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA; Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA.
| | - Eric Clark
- Department of Cell Biology, Neurobiology, & Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | | | - Ruchira Singh
- Department of Ophthalmology, University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, USA
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13
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Wang S, Du L, Peng GH. Optogenetic stimulation inhibits the self-renewal of mouse embryonic stem cells. Cell Biosci 2019; 9:73. [PMID: 31497278 PMCID: PMC6719367 DOI: 10.1186/s13578-019-0335-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 08/21/2019] [Indexed: 12/31/2022] Open
Abstract
Modulation of the embryonic stem cell state is beneficial for elucidating the innate mechanisms of development and regenerative medicine. Ion flux plays important roles in modulating the transition between stemness and differentiation in mouse embryonic stem cells (mESCs). Optogenetics is a novel tool for manipulating ion flux. To investigate the impact of optical stimulation on embryonic stem cells, optogenetically engineered V6.5 mESCs were used to measure the depolarization mediated by ChR2 on the proliferation, self-renewal, and differentiation of mESCs. Blue light stimulation significantly inhibited ChR2-GFP-V6.5 ESC proliferation and disrupted the cell cycle progression, reducing the proportion of cells in the S phase. Interestingly, optical stimulation could inhibit ChR2-GFP-V6.5 ESC self-renewal and trigger differentiation by activating the extracellular regulated protein kinase (ERK) signaling pathway. Our data suggest that membrane potential changes play pivotal roles in regulating the proliferation, self-renewal and initiation of differentiation of mESCs.
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Affiliation(s)
- Shaojun Wang
- 1Department of Ophthalmology, General Hospital of Chinese People's Liberation Army, Beijing, 100853 China.,2Department of Ophthalmology, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071 China.,3Department of Pathophysiology, Basic Medical College, Zhengzhou University, Zhengzhou, 450052 Henan China
| | - Lu Du
- 1Department of Ophthalmology, General Hospital of Chinese People's Liberation Army, Beijing, 100853 China
| | - Guang-Hua Peng
- 1Department of Ophthalmology, General Hospital of Chinese People's Liberation Army, Beijing, 100853 China.,3Department of Pathophysiology, Basic Medical College, Zhengzhou University, Zhengzhou, 450052 Henan China
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14
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Leung AW, Li JYH. An adherent-cell depletion technique to generate human neural progenitors and neurons. J Cell Physiol 2019; 234:19933-19941. [PMID: 30972783 DOI: 10.1002/jcp.28591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 03/18/2019] [Indexed: 11/06/2022]
Abstract
Existing methodologies to produce human neural stem cells and neurons from embryonic stem cells frequently involve multistep processes and the use of complex and expensive media components, cytokines or small molecules. Here, we report a simple technique to generate human neuroepithelial progenitors and neurons by periodic mechanical dissection and adherent-cell depletion on regular cell-culture grade plastic surfaces. This neural induction technique does not employ growth factors, small molecules or peptide inhibitors, apart from those present in serum-free supplements. Suggestive of their central nervous system origin, we found that neural progenitors formed by this technique expressed radial glia markers, and, when differentiated, expressed TUBB3, RBFOX3 (NeuN) and serotonin, but not markers for peripheral neurons. With these data, we postulate that incorporation of periodic mechanical stimuli and plastic surface-mediated cell selection could improve and streamline existing human neuron production protocols.
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Affiliation(s)
- Alan W Leung
- Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, Farmington, Connecticut
| | - James Y H Li
- Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, Farmington, Connecticut
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15
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Li Z, Duan H, Li W, Hu X, Jia Y, Zhao C, Zhang S, Zhou Q, Shi W. Rapid Differentiation of Multi-Zone Ocular Cells from Human Induced Pluripotent Stem Cells and Generation of Corneal Epithelial and Endothelial Cells. Stem Cells Dev 2019; 28:454-463. [PMID: 30712489 DOI: 10.1089/scd.2018.0176] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Eye is a complex organ with a highly specialized tissue structure. The establishment of human pluripotent stem cells (hPSCs) has allowed the simulation of eye development in vitro. Most differentiation works of hPSC-derived ocular cells focus on a single, tissue-specific lineage, however, that faces difficulty in reflecting the complexity of eye development. Recently, the generation of a self-formed ectodermal autonomous multi-zone of ocular cells availably mimics the process of whole-eye development. In this study, we developed a rapid defined method to induce the differentiation of multi-zone ocular cells (MZOCs) from human induced pluripotent stem cells, which specifically experienced the key progenitor stages of anterior neuroectoderm and eye field stem cells by a 2.5-dimensional culture. These differentiated cell types spanned neural retina, retinal pigment epithelium, surface ectoderm, and neural crest and lens cells. In addition, the surface ectoderm zone of MZOCs could be mechanically isolated and induced into corneal epithelial cells, and the isolated neural crest zone could be directed into corneal endothelial cells. This in vitro differentiation process vividly mimics the development of vertebrate eye, and it provides a promising model for the study of ocular morphogenesis, as well as an ideal resource of seed cells for corneal regenerative medicine.
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Affiliation(s)
- Zongyi Li
- 1 Medical College, Qingdao University, Qingdao, China.,2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Haoyun Duan
- 2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Wenjing Li
- 2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Xiaoli Hu
- 2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Yanni Jia
- 1 Medical College, Qingdao University, Qingdao, China.,2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Can Zhao
- 1 Medical College, Qingdao University, Qingdao, China.,2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Songmei Zhang
- 2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Qingjun Zhou
- 2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
| | - Weiyun Shi
- 1 Medical College, Qingdao University, Qingdao, China.,2 State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao,China
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16
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Kim E, Kim M, Hwang SU, Kim J, Lee G, Park YS, Hyun SH. Neural induction of porcine-induced pluripotent stem cells and further differentiation using glioblastoma-cultured medium. J Cell Mol Med 2019; 23:2052-2063. [PMID: 30609263 PMCID: PMC6378232 DOI: 10.1111/jcmm.14111] [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: 06/18/2018] [Revised: 11/04/2018] [Accepted: 12/06/2018] [Indexed: 12/04/2022] Open
Abstract
Prior to transplantation, preclinical study of safety and efficacy of neural progenitor cells (NPCs) is needed. Therefore, it is important to generate an efficient in vitro platform for neural cell differentiation in large animal models such as pigs. In this study, porcine‐induced pluripotent stem cells (iPSCs) were seeded at high cell density to a neural induction medium containing the dual Sma‐ and Mad‐related protein (SMAD) inhibitors, a TGF‐β inhibitor and BMP4 inhibitor. The dSMADi‐derived NPCs showed NPC markers such as PLAG1, NESTIN and VIMENTIN and higher mRNA expression of Sox1 compared to the control. The mRNA expression of HOXB4 was found to significantly increase in the retinoic acid‐treated group. NPCs propagated in vitro and generated neurospheres that are capable of further differentiation in neurons and glial cells. Gliobalstoma‐cultured medium including injury‐related cytokines treated porcine iPSC‐NPCs survive well in vitro and showed more neuronal marker expression compared to standard control medium. Collectively, the present study developed an efficient method for production of neural commitment of porcine iPSCs into NPCs.
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Affiliation(s)
- Eunhye Kim
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Korea.,Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Mirae Kim
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Korea.,Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Seon-Ung Hwang
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Korea.,Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Jongpil Kim
- Laboratory of Stem Cells and Cell Reprogramming, Department of Biomedical Engineering, Dongguk University, Seoul, Korea
| | - Gabsang Lee
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Young Seok Park
- Department of Neurosurgery, College of Medicine, Chungbuk National University Hospital, Chungbuk National University, Cheongju, Korea
| | - Sang-Hwan Hyun
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Korea.,Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Korea
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17
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Lee JH, Liu JW, Lin SZ, Harn HJ, Chiou TW. Advances in Patient-Specific Induced Pluripotent Stem Cells Shed Light on Drug Discovery for Amyotrophic Lateral Sclerosis. Cell Transplant 2018; 27:1301-1312. [PMID: 30033758 PMCID: PMC6168987 DOI: 10.1177/0963689718785154] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Induced pluripotent stem cells (iPSCs), which are generated through reprogramming adult somatic cells by expressing specific transcription factors, can differentiate into derivatives of the three embryonic germ layers and accelerate rapid advances in stem cell research. Neurological diseases such as amyotrophic lateral sclerosis (ALS) have benefited enormously from iPSC technology. This approach can be particularly important for creating iPSCs from patients with familial or sporadic forms of ALS. Motor neurons differentiated from the ALS-patient-derived iPSC can help to determine the relationship between cellular phenotype and genotype. Patient-derived iPSCs facilitate the development of new drugs and/or drug screening for ALS treatment and allow the exploration of the possible mechanism of ALS disease. In this article, we reviewed ALS-patient-specific iPSCs with various genetic mutations, progress in drug development for ALS disease, functional assays showing the differentiation of iPSCs into mature motor neurons, and promising biomarkers in ALS patients for the evaluation of drug candidates.
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Affiliation(s)
- Jui-Hao Lee
- 1 Everfront Biotech Inc., New Taipei City, Taiwan, Republic of China.,2 Department of Life Science and Graduate Institute of Biotechnology, National Dong-Hwa University, Hualien, Taiwan, Republic of China
| | - Jen-Wei Liu
- 1 Everfront Biotech Inc., New Taipei City, Taiwan, Republic of China.,2 Department of Life Science and Graduate Institute of Biotechnology, National Dong-Hwa University, Hualien, Taiwan, Republic of China
| | - Shinn-Zong Lin
- 3 Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,4 Department of Neurosurgery, Tzu Chi University, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China
| | - Horng-Jyh Harn
- 3 Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,5 Department of Pathology, Tzu Chi University, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China
| | - Tzyy-Wen Chiou
- 2 Department of Life Science and Graduate Institute of Biotechnology, National Dong-Hwa University, Hualien, Taiwan, Republic of China
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18
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Timing of Wnt Inhibition Modulates Directed Differentiation of Medial Ganglionic Eminence Progenitors from Human Pluripotent Stem Cells. Stem Cells Int 2018; 2018:3983090. [PMID: 30050576 PMCID: PMC6040240 DOI: 10.1155/2018/3983090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 04/09/2018] [Accepted: 05/16/2018] [Indexed: 12/25/2022] Open
Abstract
In vitro differentiation of human pluripotent stem cell into relevant cell types is a desirable model system that has the human biological context, is a renewable source, and is scalable. GABA interneurons and basal forebrain cholinergic neurons, derivates of the medial ganglionic eminence (MGE), are implicated in diverse neuropsychiatric diseases. Various protocols have been proposed to generate MGE progenitors: the embryoid body- (EB-) based rosette-derived (RD), the adherent (AdD), and the nonadherent (NAdD) approaches. While Wnt inhibition is frequently incorporated into the strategy, the timing varies between protocols and there is a lack of standardized outcome reporting, which precludes direct comparison. Here, we report a head-to-head comparison in three distinct experimental models to establish whether Wnt inhibition during neural stem cell, NSC (stage 1), or neural progenitor cell, NPC (stage 2), formation facilitates MGE differentiation. Wnt inhibition at both stages promotes MGE progenitor differentiation when compared to no inhibition. However, NSC (stage 1) Wnt inhibition markedly reduces the number of MGE progenitors available for downstream applications in the RD and the NAdD protocols due to early inhibition of proliferation. NPC (stage 2) Wnt inhibition in the adherent system is comparable to the EB-based methods offering a techically less challenging alternative.
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19
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Adhya D, Annuario E, Lancaster MA, Price J, Baron‐Cohen S, Srivastava DP. Understanding the role of steroids in typical and atypical brain development: Advantages of using a "brain in a dish" approach. J Neuroendocrinol 2018; 30:e12547. [PMID: 29024164 PMCID: PMC5838783 DOI: 10.1111/jne.12547] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 09/14/2017] [Accepted: 10/03/2017] [Indexed: 01/02/2023]
Abstract
Steroids have an important role in growth, development, sexual differentiation and reproduction. All four classes of steroids, androgens, oestrogens, progestogens and glucocorticoids, have varying effects on the brain. Androgens and oestrogens are involved in the sexual differentiation of the brain, and also influence cognition. Progestogens such as progesterone and its metabolites have been shown to be involved in neuroprotection, although their protective effects are timing-dependent. Glucocorticoids are linked with stress and memory performance, also in a dose- and time-dependent manner. Importantly, dysfunction in steroid function has been implicated in the pathogenesis of disease. Moreover, regulating steroid-signalling has been suggested as potential therapeutic avenue for the treatment of a number of neurodevelopmental, psychiatric and neurodegenerative disorders. Therefore, clarifying the role of steroids in typical and atypical brain function is essential for understanding typical brain functions, as well as determining their potential use for pharmacological intervention in the atypical brain. However, the majority of studies have thus far have been conducted using animal models, with limited work using native human tissue or cells. Here, we review the effect of steroids in the typical and atypical brain, focusing on the cellular, molecular functions of these molecules determined from animal models, and the therapeutic potential as highlighted by human studies. We further discuss the promise of human-induced pluripotent stem cells, including advantages of using three-dimensional neuronal cultures (organoids) in high-throughput screens, in accelerating our understanding of the role of steroids in the typical brain, and also with respect to their therapeutic value in the understanding and treatment of the atypical brain.
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Affiliation(s)
- D. Adhya
- Department of PsychiatryAutism Research CentreUniversity of CambridgeCambridgeUK
- Department of Basic and Clinical NeuroscienceMaurice Wohl Clinical Neuroscience InstituteInstitute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK
- MRC Laboratory of Molecular BiologyCambridgeUK
| | - E. Annuario
- Department of Basic and Clinical NeuroscienceMaurice Wohl Clinical Neuroscience InstituteInstitute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK
| | | | - J. Price
- Department of Basic and Clinical NeuroscienceMaurice Wohl Clinical Neuroscience InstituteInstitute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK
- MRC Centre for Neurodevelopmental DisordersKing's College LondonLondonUK
- National Institute for Biological Standards and ControlSouth MimmsUK
| | - S. Baron‐Cohen
- Department of PsychiatryAutism Research CentreUniversity of CambridgeCambridgeUK
| | - D. P. Srivastava
- Department of Basic and Clinical NeuroscienceMaurice Wohl Clinical Neuroscience InstituteInstitute of Psychiatry, Psychology and NeuroscienceKing's College LondonLondonUK
- MRC Centre for Neurodevelopmental DisordersKing's College LondonLondonUK
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20
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Su Z, Zhang Y, Liao B, Zhong X, Chen X, Wang H, Guo Y, Shan Y, Wang L, Pan G. Antagonism between the transcription factors NANOG and OTX2 specifies rostral or caudal cell fate during neural patterning transition. J Biol Chem 2018; 293:4445-4455. [PMID: 29386354 DOI: 10.1074/jbc.m117.815449] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 01/29/2018] [Indexed: 01/08/2023] Open
Abstract
During neurogenesis, neural patterning is a critical step during which neural progenitor cells differentiate into neurons with distinct functions. However, the molecular determinants that regulate neural patterning remain poorly understood. Here we optimized the "dual SMAD inhibition" method to specifically promote differentiation of human pluripotent stem cells (hPSCs) into forebrain and hindbrain neural progenitor cells along the rostral-caudal axis. We report that neural patterning determination occurs at the very early stage in this differentiation. Undifferentiated hPSCs expressed basal levels of the transcription factor orthodenticle homeobox 2 (OTX2) that dominantly drove hPSCs into the "default" rostral fate at the beginning of differentiation. Inhibition of glycogen synthase kinase 3β (GSK3β) through CHIR99021 application sustained transient expression of the transcription factor NANOG at early differentiation stages through Wnt signaling. Wnt signaling and NANOG antagonized OTX2 and, in the later stages of differentiation, switched the default rostral cell fate to the caudal one. Our findings have uncovered a mutual antagonism between NANOG and OTX2 underlying cell fate decisions during neural patterning, critical for the regulation of early neural development in humans.
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Affiliation(s)
- Zhenghui Su
- From the School of Life Sciences, University of Science and Technology of China, 230027 Hefei, China.,the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China.,the Hefei Institute of Stem Cell and Regenerative Medicine, 230088 Hefei, China
| | - Yanqi Zhang
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China
| | - Baojian Liao
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China.,the Hefei Institute of Stem Cell and Regenerative Medicine, 230088 Hefei, China
| | - Xiaofen Zhong
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China
| | - Xin Chen
- the School of Automation, Guangdong University of Technology, 510006 Guangzhou, China, and
| | - Haitao Wang
- From the School of Life Sciences, University of Science and Technology of China, 230027 Hefei, China
| | - Yiping Guo
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China
| | - Yongli Shan
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China
| | - Lihui Wang
- the Department of Pathology, Medical College, Jinan University, 510632 Guangzhou, China
| | - Guangjin Pan
- the Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530 Guangzhou, China, .,the Hefei Institute of Stem Cell and Regenerative Medicine, 230088 Hefei, China
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21
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Floruta CM, Du R, Kang H, Stein JL, Weick JP. Default Patterning Produces Pan-cortical Glutamatergic and CGE/LGE-like GABAergic Neurons from Human Pluripotent Stem Cells. Stem Cell Reports 2017; 9:1463-1476. [PMID: 29107596 PMCID: PMC5831028 DOI: 10.1016/j.stemcr.2017.09.023] [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: 02/22/2017] [Revised: 09/25/2017] [Accepted: 09/26/2017] [Indexed: 10/25/2022] Open
Abstract
Default differentiation of human pluripotent stem cells has been promoted as a model of cortical development. In this study, a developmental transcriptome analysis of default-differentiated hPSNs revealed a gene expression program resembling in vivo CGE/LGE subpallial domains and GABAergic signaling. A combination of bioinformatic, functional, and immunocytochemical analysis further revealed that hPSNs consist of both cortical glutamatergic and CGE-like GABAergic neurons. This study provides a comprehensive characterization of the heterogeneous group of neurons produced by default differentiation and insight into future directed differentiation strategies.
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Affiliation(s)
- Crina M. Floruta
- Department of Neurosciences, University of New Mexico-Health Science Center, Albuquerque, NM 87131, USA
| | - Ruofei Du
- UNM Comprehensive Cancer Center, University of New Mexico-Health Science Center, Albuquerque, NM 87131, USA
| | - Huining Kang
- UNM Comprehensive Cancer Center, University of New Mexico-Health Science Center, Albuquerque, NM 87131, USA,Department of Internal Medicine, University of New Mexico-Health Science Center, Albuquerque, NM 87131, USA
| | - Jason L. Stein
- Department of Genetics, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA,UNC Neuroscience Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Jason P. Weick
- Department of Neurosciences, University of New Mexico-Health Science Center, Albuquerque, NM 87131, USA,Corresponding author
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22
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Abstract
Human pluripotent stem cells (hPSCs) provide a model to study early neural development, model pathological processes, and develop therapeutics. The generation of functionally specialized neural subtypes from hPSCs relies on fundamental developmental principles learned from animal studies. Manipulation of these principles enables production of highly enriched neural types with functional attributes that resemble those in the brain. Further development to promote faster maturation or aging as well as circuit integration will help realize the potential of hPSC-derived neural cells in disease modeling and cell therapy.
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Affiliation(s)
- Yunlong Tao
- Waisman Center, University of Wisconsin, Madison, WI 53705, USA
| | - Su-Chun Zhang
- Waisman Center, University of Wisconsin, Madison, WI 53705, USA; Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA; Department of Neurology, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, USA.
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23
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Fathi A, Eisa-Beygi S, Baharvand H. Signaling Molecules Governing Pluripotency and Early Lineage Commitments in Human Pluripotent Stem Cells. CELL JOURNAL 2017; 19:194-203. [PMID: 28670512 PMCID: PMC5412778 DOI: 10.22074/cellj.2016.3915] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/15/2016] [Indexed: 11/04/2022]
Abstract
Signaling in pluripotent stem cells is a complex and dynamic process involving multiple mediators, finely tuned to balancing pluripotency and differentiation states. Characterizing and modifying the necessary signaling pathways to attain desired cell types is required for stem-cell applications in various fields of regenerative medicine. These signals may help enhance the differentiation potential of pluripotent cells towards each of the embryonic lineages and enable us to achieve pure in vitro cultures of various cell types. This review provides a timely synthesis of recent advances into how maintenance of pluripotency in hPSCs is regulated by extrinsic cues, such as the fibroblast growth factor (FGF) and ACTIVIN signaling pathways, their interplay with other signaling pathways, namely, wingless- type MMTV integration site family (WNT) and mammalian target of rapamycin (mTOR), and the pathways governing the determination of multiple lineages.
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Affiliation(s)
- Ali Fathi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Shahram Eisa-Beygi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Developmental Biology, University of Science and Culture, ACECR, Tehran, Iran
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24
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Time-Course Gene Expression Profiling Reveals a Novel Role of Non-Canonical WNT Signaling During Neural Induction. Sci Rep 2016; 6:32600. [PMID: 27600186 PMCID: PMC5013468 DOI: 10.1038/srep32600] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/10/2016] [Indexed: 12/22/2022] Open
Abstract
The process of neuroepithelial differentiation from human pluripotent stem cells (PSCs) resembles in vivo neuroectoderm induction in the temporal course, morphogenesis, and biochemical changes. This in vitro model is therefore well-suited to reveal previously unknown molecular mechanisms underlying neural induction in humans. By transcriptome analysis of cells along PSC differentiation to early neuroepithelia at day 6 and definitive neuroepithelia at day 10, we found downregulation of genes that are associated with TGF-β and canonical WNT/β-CATENIN signaling, confirming the roles of classical signaling in human neural induction. Interestingly, WNT/Ca2+ signaling was upregulated. Pharmacological inhibition of the downstream effector of WNT/Ca2+ pathway, Ca2+/calmodulin-dependent protein kinase II (CaMKII), led to an inhibition of the neural marker PAX6 and upregulation of epidermal marker K18, suggesting that Ca2+/CaMKII signaling promotes neural induction by preventing the alternative epidermal fate. In addition, our analyses revealed known and novel expression patterns of genes that are involved in DNA methylation, histone modification, as well as epithelial-mesenchymal transition, highlighting potential roles of those genes and signaling pathways during neural differentiation.
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25
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Jones JR, Zhang SC. Engineering human cells and tissues through pluripotent stem cells. Curr Opin Biotechnol 2016; 40:133-138. [PMID: 27082135 DOI: 10.1016/j.copbio.2016.03.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 03/11/2016] [Accepted: 03/15/2016] [Indexed: 11/29/2022]
Abstract
The utility of human pluripotent stem cells (hPSCs) depends on their ability to produce functional cells and tissues of the body. Two strategies have been developed: directed differentiation of enriched populations of cells that match a regional and functional profile and spontaneous generation of three-dimensional organoids that resemble tissues in the body. Genomic editing of hPSCs and their differentiated cells broadens the use of the hPSC paradigm in studying human cellular function and disease as well as developing therapeutics.
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Affiliation(s)
- Jeffrey R Jones
- Waisman Center, University of Wisconsin, Madison, WI 53705, United States
| | - Su-Chun Zhang
- Waisman Center, University of Wisconsin, Madison, WI 53705, United States; Department of Neuroscience, University of Wisconsin, Madison, WI 53705, United States; Department of Neurology, University of Wisconsin, Madison, WI 53705, United States.
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26
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Neural Conversion and Patterning of Human Pluripotent Stem Cells: A Developmental Perspective. Stem Cells Int 2016; 2016:8291260. [PMID: 27069483 PMCID: PMC4812494 DOI: 10.1155/2016/8291260] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 01/24/2016] [Indexed: 01/19/2023] Open
Abstract
Since the reprogramming of adult human terminally differentiated somatic cells into induced pluripotent stem cells (hiPSCs) became a reality in 2007, only eight years have passed. Yet over this relatively short period, myriad experiments have revolutionized previous stem cell dogmata. The tremendous promise of hiPSC technology for regenerative medicine has fuelled rising expectations from both the public and scientific communities alike. In order to effectively harness hiPSCs to uncover fundamental mechanisms of disease, it is imperative to first understand the developmental neurobiology underpinning their lineage restriction choices in order to predictably manipulate cell fate to desired derivatives. Significant progress in developmental biology provides an invaluable resource for rationalising directed differentiation of hiPSCs to cellular derivatives of the nervous system. In this paper we begin by reviewing core developmental concepts underlying neural induction in order to provide context for how such insights have guided reductionist in vitro models of neural conversion from hiPSCs. We then discuss early factors relevant in neural patterning, again drawing upon crucial knowledge gained from developmental neurobiological studies. We conclude by discussing open questions relating to these concepts and how their resolution might serve to strengthen the promise of pluripotent stem cells in regenerative medicine.
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27
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Gene Expression Studies on Human Trisomy 21 iPSCs and Neurons: Towards Mechanisms Underlying Down's Syndrome and Early Alzheimer's Disease-Like Pathologies. Methods Mol Biol 2016; 1303:247-65. [PMID: 26235072 DOI: 10.1007/978-1-4939-2627-5_15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The cause of Alzheimer disease (AD) is not well understood and there is no cure. Our ability to understand the early events in the course of AD is severely limited by the difficulty of identifying individuals who are in the early, preclinical stage of this disease. Most individuals with Down's syndrome (DS, trisomy 21) will predictably develop AD and that they will do so at a young age makes them an ideal population in which to study the early stages of AD. Several recent studies have exploited induced pluripotent stem cells (iPSCs) generated from individuals with familial AD, spontaneous AD and DS to attempt to identify early events and discover novel biomarkers of disease progression in AD. Here, we summarize the progress and limitations of these iPSC studies with a focus on iPSC-derived neurons. Further, we outline the methodology and results for comparing gene expression between AD and DS iPSC-derived neurons. We highlight differences and commonalities in these data that may implicate underlying genes and pathways that are causative for AD.
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28
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Zhu X, Li B, Ai Z, Xiang Z, Zhang K, Qiu X, Chen Y, Li Y, Rizak JD, Niu Y, Hu X, Sun YE, Ji W, Li T. A Robust Single Primate Neuroepithelial Cell Clonal Expansion System for Neural Tube Development and Disease Studies. Stem Cell Reports 2015; 6:228-42. [PMID: 26584544 PMCID: PMC4750068 DOI: 10.1016/j.stemcr.2015.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 10/13/2015] [Accepted: 10/14/2015] [Indexed: 01/15/2023] Open
Abstract
Developing a model of primate neural tube (NT) development is important to promote many NT disorder studies in model organisms. Here, we report a robust and stable system to allow for clonal expansion of single monkey neuroepithelial stem cells (NESCs) to develop into miniature NT-like structures. Single NESCs can produce functional neurons in vitro, survive, and extensively regenerate neuron axons in monkey brain. NT formation and NESC maintenance depend on high metabolism activity and Wnt signaling. NESCs are regionally restricted to a telencephalic fate. Moreover, single NESCs can turn into radial glial progenitors (RGPCs). The transition is accurately regulated by Wnt signaling through regulation of Notch signaling and adhesion molecules. Finally, using the “NESC-TO-NTs” system, we model the functions of folic acid (FA) on NT closure and demonstrate that FA can regulate multiple mechanisms to prevent NT defects. Our system is ideal for studying NT development and diseases. Long-term cultured neuroepithelial stem cells (NESCs) can be induced from monkey ESCs Single NESCs can self-organize into miniature neural tube (NT) structures NESCs have high metabolism activity and are restricted to a telencephalic fate The “NESC-TO-NTs” system can model and study RPGC transition and NT defect disease
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Affiliation(s)
- Xiaoqing Zhu
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China
| | - Bo Li
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; Chongqing Key Lab of Forage & Herbivore, College of Animal Science and Technology (CAST), Southwest University, No. 1 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Zongyong Ai
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China
| | - Zheng Xiang
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; Chongqing Key Lab of Forage & Herbivore, College of Animal Science and Technology (CAST), Southwest University, No. 1 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Kunshang Zhang
- Translational Stem Cell Research Center, Tongji Hospital, Tongji University School of Medicine, Shanghai 200092, China
| | - Xiaoyan Qiu
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China
| | - Yongchang Chen
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China
| | - Yuemin Li
- Chongqing Key Lab of Forage & Herbivore, College of Animal Science and Technology (CAST), Southwest University, No. 1 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Joshua D Rizak
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223 Yunnan, China
| | - Yuyu Niu
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China
| | - Xintian Hu
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223 Yunnan, China
| | - Yi Eve Sun
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; Translational Stem Cell Research Center, Tongji Hospital, Tongji University School of Medicine, Shanghai 200092, China
| | - Weizhi Ji
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China.
| | - Tianqing Li
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, 650500 Yunnan, China; National Engineering Research Center of Biomedicine and Animal Science, Kunming 650500, China.
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29
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Shum C, Macedo SC, Warre-Cornish K, Cocks G, Price J, Srivastava DP. Utilizing induced pluripotent stem cells (iPSCs) to understand the actions of estrogens in human neurons. Horm Behav 2015; 74:228-42. [PMID: 26143621 PMCID: PMC4579404 DOI: 10.1016/j.yhbeh.2015.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/11/2015] [Accepted: 06/25/2015] [Indexed: 01/05/2023]
Abstract
This article is part of a Special Issue "Estradiol and Cognition". Over recent years tremendous progress has been made towards understanding the molecular and cellular mechanism by which estrogens exert enhancing effects on cognition, and how they act as a neuroprotective or neurotrophic agent in disease. Currently, much of this work has been carried out in animal models with only a limited number of studies using native human tissue or cells. Recent advances in stem cell technology now make it possible to reprogram somatic cells from humans into induced pluripotent stem cells (iPSCs), which can subsequently be differentiated into neurons of specific lineages. Importantly, the reprogramming of cells allows for the generation of iPSCs that retain the genetic "makeup" of the donor. Therefore, it is possible to generate iPSC-derived neurons from patients diagnosed with specific diseases, that harbor the complex genetic background associated with the disorder. Here, we review the iPSC technology and how it's currently being used to model neural development and neurological diseases. Furthermore, we explore whether this cellular system could be used to understand the role of estrogens in human neurons, and present preliminary data in support of this. We further suggest that the use of iPSC technology offers a novel system to not only further understand estrogens' effects in human cells, but also to investigate the mechanism by which estrogens are beneficial in disease. Developing a greater understanding of these mechanisms in native human cells will also aid in the development of safer and more effective estrogen-based therapeutics.
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Affiliation(s)
- Carole Shum
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK
| | - Sara C Macedo
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK; Faculty of Engineering, Universidade do Porto, 4200-465 Porto, Portugal
| | - Katherine Warre-Cornish
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK
| | - Graham Cocks
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK
| | - Jack Price
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK
| | - Deepak P Srivastava
- Department of Basic and Clinical Neuroscience, Cell and Behaviour Unit, The James Black Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK.
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30
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Gorris R, Fischer J, Erwes KL, Kesavan J, Peterson DA, Alexander M, Nöthen MM, Peitz M, Quandel T, Karus M, Brüstle O. Pluripotent stem cell-derived radial glia-like cells as stable intermediate for efficient generation of human oligodendrocytes. Glia 2015; 63:2152-67. [PMID: 26123132 DOI: 10.1002/glia.22882] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 06/09/2015] [Accepted: 06/10/2015] [Indexed: 11/10/2022]
Abstract
Neural precursor cells (NPCs) derived from human pluripotent stem cells (hPSCs) represent an attractive tool for the in vitro generation of various neural cell types. However, the developmentally early NPCs emerging during hPSC differentiation typically show a strong propensity for neuronal differentiation, with more limited potential for generating astrocytes and, in particular, for generating oligodendrocytes. This phenomenon corresponds well to the consecutive and protracted generation of neurons and GLIA during normal human development. To obtain a more gliogenic NPC type, we combined growth factor-mediated expansion with pre-exposure to the differentiation-inducing agent retinoic acid and subsequent immunoisolation of CD133-positive cells. This protocol yields an adherent and self-renewing population of hindbrain/spinal cord radial glia (RG)-like neural precursor cells (RGL-NPCs) expressing typical neural stem cell markers such as nestin, ASCL1, SOX2, and PAX6 as well as RG markers BLBP, GLAST, vimentin, and GFAP. While RGL-NPCs maintain the ability for tripotential differentiation into neurons, astrocytes, and oligodendrocytes, they exhibit greatly enhanced propensity for oligodendrocyte generation. Under defined differentiation conditions promoting the expression of the major oligodendrocyte fate-determinants OLIG1/2, NKX6.2, NKX2.2, and SOX10, RGL-NPCs efficiently convert into NG2-positive oligodendroglial progenitor cells (OPCs) and are subsequently capable of in vivo myelination. Representing a stable intermediate between PSCs and OPCs, RGL-NPCs expedite the generation of PSC-derived oligodendrocytes with O4-, 4860-, and myelin basic protein (MBP)-positive cells that already appear within 7 weeks following growth factor withdrawal-induced differentiation. Thus, RGL-NPCs may serve as robust tool for time-efficient generation of human oligodendrocytes from embryonic and induced pluripotent stem cells.
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Affiliation(s)
- Raphaela Gorris
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Julia Fischer
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Kim Lina Erwes
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Jaideep Kesavan
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Daniel A Peterson
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany.,Center for Stem Cell and Regenerative Medicine, Department of Neuroscience, Rosalind Franklin University of Medicine and Science, Chicago, Illinois
| | - Michael Alexander
- Institute of Human Genetics, LIFE & BRAIN Center, University of Bonn, Germany
| | - Markus M Nöthen
- Institute of Human Genetics, LIFE & BRAIN Center, University of Bonn, Germany
| | - Michael Peitz
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany.,German Center for Neurodegenerative Diseases, Bonn, Germany
| | - Tamara Quandel
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Michael Karus
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
| | - Oliver Brüstle
- Institute of Reconstructive Neurobiology, LIFE & BRAIN Center, University of Bonn, Germany
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31
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Telias M, Ben-Yosef D. Modeling neurodevelopmental disorders using human pluripotent stem cells. Stem Cell Rev Rep 2015; 10:494-511. [PMID: 24728983 DOI: 10.1007/s12015-014-9507-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Neurodevelopmental disorders (NDs) are impairments that affect the development and growth of the brain and the central nervous system during embryonic and early postnatal life. Genetically manipulated animals have contributed greatly to the advancement of ND research, but many of them differ considerably from the human phenotype. Cellular in vitro models are also valuable, but the availability of human neuronal cells is limited and their lifespan in culture is short. Human pluripotent stem cells (hPSCs), including embryonic stem cells and induced pluripotent stem cells, comprise a powerful tool for studying developmentally regulated diseases, including NDs. We reviewed all recent studies in which hPSCs were used as in vitro models for diseases and syndromes characterized by impairment of neurogenesis or synaptogenesis leading to intellectual disability and delayed neurodevelopment. We analyzed their methodology and results, focusing on the data obtained following in vitro neural differentiation and gene expression and profiling of the derived neurons. Electrophysiological recording of action potentials, synaptic currents and response to neurotransmitters is pivotal for validation of the neuronal fate as well as for assessing phenotypic dysfunctions linked to the disease in question. We therefore focused on the studies which included electrophysiological recordings on the in vitro-derived neurons. Finally, we addressed specific issues that are critical for the advancement of this area of research, specifically in providing a reliable human pre-clinical research model and drug screening platform.
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Affiliation(s)
- Michael Telias
- The Wolfe PGD-Stem Cell Lab, Racine IVF Unit, Lis Maternity Hospital, Tel-Aviv Sourasky Medical Center, Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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32
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Melo-Braga MN, Meyer M, Zeng X, Larsen MR. Characterization of human neural differentiation from pluripotent stem cells using proteomics/PTMomics-Current state-of-the-art and challenges. Proteomics 2015; 15:656-74. [DOI: 10.1002/pmic.201400388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 11/11/2014] [Accepted: 11/19/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Marcella Nunes Melo-Braga
- Department of Biochemistry and Molecular Biology; University of Southern Denmark; Odense Denmark
- Center for Clinical Proteomics; University of Southern Denmark; Odense Denmark
| | - Morten Meyer
- Department of Neurobiology Research; Institute of Molecular Medicine; University of Southern Denmark; Odense Denmark
| | | | - Martin Røssel Larsen
- Department of Biochemistry and Molecular Biology; University of Southern Denmark; Odense Denmark
- Center for Clinical Proteomics; University of Southern Denmark; Odense Denmark
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33
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Zhu W, Yao X, Liang Y, Liang D, Song L, Jing N, Li J, Wang G. Mediator Med23 deficiency enhances neural differentiation of murine embryonic stem cells through modulating BMP signaling. Development 2015; 142:465-76. [PMID: 25564654 DOI: 10.1242/dev.112946] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Unraveling the mechanisms underlying early neural differentiation of embryonic stem cells (ESCs) is crucial to developing cell-based therapies of neurodegenerative diseases. Neural fate acquisition is proposed to be controlled by a 'default' mechanism, for which the molecular regulation is not well understood. In this study, we investigated the functional roles of Mediator Med23 in pluripotency and lineage commitment of murine ESCs. Unexpectedly, we found that, despite the largely unchanged pluripotency and self-renewal of ESCs, Med23 depletion rendered the cells prone to neural differentiation in different differentiation assays. Knockdown of two other Mediator subunits, Med1 and Med15, did not alter the neural differentiation of ESCs. Med15 knockdown selectively inhibited endoderm differentiation, suggesting the specificity of cell fate control by distinctive Mediator subunits. Gene profiling revealed that Med23 depletion attenuated BMP signaling in ESCs. Mechanistically, MED23 modulated Bmp4 expression by controlling the activity of ETS1, which is involved in Bmp4 promoter-enhancer communication. Interestingly, med23 knockdown in zebrafish embryos also enhanced neural development at early embryogenesis, which could be reversed by co-injection of bmp4 mRNA. Taken together, our study reveals an intrinsic, restrictive role of MED23 in early neural development, thus providing new molecular insights for neural fate determination.
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Affiliation(s)
- Wanqu Zhu
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiao Yao
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yan Liang
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Dan Liang
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Lu Song
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Naihe Jing
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jinsong Li
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Gang Wang
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
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34
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Yang F, Liu Y, Tu J, Wan J, Zhang J, Wu B, Chen S, Zhou J, Mu Y, Wang L. Activated astrocytes enhance the dopaminergic differentiation of stem cells and promote brain repair through bFGF. Nat Commun 2014; 5:5627. [PMID: 25517983 PMCID: PMC4284631 DOI: 10.1038/ncomms6627] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 10/21/2014] [Indexed: 02/06/2023] Open
Abstract
Astrocytes provide neuroprotective effects against degeneration of dopaminergic (DA) neurons and play a fundamental role in DA differentiation of neural stem cells. Here we show that light illumination of astrocytes expressing engineered channelrhodopsin variant (ChETA) can remarkably enhance the release of basic fibroblast growth factor (bFGF) and significantly promote the DA differentiation of human embryonic stem cells (hESCs) in vitro. Light activation of transplanted astrocytes in the substantia nigra (SN) also upregulates bFGF levels in vivo and promotes the regenerative effects of co-transplanted stem cells. Importantly, upregulation of bFGF levels, by specific light activation of endogenous astrocytes in the SN, enhances the DA differentiation of transplanted stem cells and promotes brain repair in a mouse model of Parkinson's disease (PD). Our study indicates that astrocyte-derived bFGF is required for regulation of DA differentiation of the stem cells and may provide a strategy targeting astrocytes for treatment of PD.
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Affiliation(s)
- Fan Yang
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yunhui Liu
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jie Tu
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jun Wan
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jie Zhang
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Bifeng Wu
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Shanping Chen
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jiawei Zhou
- State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Institute of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yangling Mu
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Liping Wang
- Shenzhen Key Lab of Neuropsychiatric Modulation, CAS Center for Excellence in Brain Science, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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Effenberg A, Stanslowsky N, Klein A, Wesemann M, Haase A, Martin U, Dengler R, Grothe C, Ratzka A, Wegner F. Striatal Transplantation of Human Dopaminergic Neurons Differentiated From Induced Pluripotent Stem Cells Derived From Umbilical Cord Blood Using Lentiviral Reprogramming. Cell Transplant 2014; 24:2099-112. [PMID: 25420114 DOI: 10.3727/096368914x685591] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Human induced pluripotent stem cells (hiPSCs) are promising sources for regenerative therapies like the replacement of dopaminergic neurons in Parkinson's disease. They offer an unlimited cell source that can be standardized and optimized to produce applicable cell populations to gain maximal functional recovery. In the present study, human cord blood-derived iPSCs (hCBiPSCs) were differentiated into dopaminergic neurons utilizing two different in vitro protocols for neural induction: (protocol I) by fibroblast growth factor (FGF-2) signaling, (protocol II) by bone morphogenetic protein (BMP)/transforming growth factor (TGF-β) inhibition. After maturation, in vitro increased numbers of tyrosine hydroxylase (TH)-positive neurons (7.4% of total cells) were observed by protocol II compared to 3.5% in protocol I. Furthermore, 3 weeks after transplantation in hemiparkinsonian rats in vivo, a reduced number of undifferentiated proliferating cells was achieved with protocol II. In contrast, proliferation still occurred in protocol I-derived grafts, resulting in tumor-like growth in two out of four animals 3 weeks after transplantation. Protocol II, however, did not increase the number of TH(+) cells in the striatal grafts of hemiparkinsonian rats. In conclusion, BMP/TGF-β inhibition was more effective than FGF-2 signaling with regard to dopaminergic induction of hCBiPSCs in vitro and prevented graft overgrowth in vivo.
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Affiliation(s)
- Anna Effenberg
- Institute of Neuroanatomy, Hannover Medical School, Hannover, Germany
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Substratum-induced differentiation of human pluripotent stem cells reveals the coactivator YAP is a potent regulator of neuronal specification. Proc Natl Acad Sci U S A 2014; 111:13805-10. [PMID: 25201954 DOI: 10.1073/pnas.1415330111] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Physical stimuli can act in either a synergistic or antagonistic manner to regulate cell fate decisions, but it is less clear whether insoluble signals alone can direct human pluripotent stem (hPS) cell differentiation into specialized cell types. We previously reported that stiff materials promote nuclear localization of the Yes-associated protein (YAP) transcriptional coactivator and support long-term self-renewal of hPS cells. Here, we show that even in the presence of soluble pluripotency factors, compliant substrata inhibit the nuclear localization of YAP and promote highly efficient differentiation of hPS cells into postmitotic neurons. In the absence of neurogenic factors, the effective substrata produce neurons rapidly (2 wk) and more efficiently (>75%) than conventional differentiation methods. The neurons derived from substrate induction express mature markers and possess action potentials. The hPS differentiation observed on compliant surfaces could be recapitulated on stiff surfaces by adding small-molecule inhibitors of F-actin polymerization or by depleting YAP. These studies reveal that the matrix alone can mediate differentiation of hPS cells into a mature cell type, independent of soluble inductive factors. That mechanical cues can override soluble signals suggests that their contributions to early tissue development and lineage commitment are profound.
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Cho A, Tang Y, Davila J, Deng S, Chen L, Miller E, Wernig M, Graef IA. Calcineurin signaling regulates neural induction through antagonizing the BMP pathway. Neuron 2014; 82:109-124. [PMID: 24698271 PMCID: PMC4011666 DOI: 10.1016/j.neuron.2014.02.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2014] [Indexed: 12/28/2022]
Abstract
Development of the nervous system begins with neural induction, which is controlled by complex signaling networks functioning in concert with one another. Fine-tuning of the bone morphogenetic protein (BMP) pathway is essential for neural induction in the developing embryo. However, the molecular mechanisms by which cells integrate the signaling pathways that contribute to neural induction have remained unclear. We find that neural induction is dependent on the Ca(2+)-activated phosphatase calcineurin (CaN). Fibroblast growth factor (FGF)-regulated Ca(2+) entry activates CaN, which directly and specifically dephosphorylates BMP-regulated Smad1/5 proteins. Genetic and biochemical analyses revealed that CaN adjusts the strength and transcriptional output of BMP signaling and that a reduction of CaN activity leads to an increase of Smad1/5-regulated transcription. As a result, FGF-activated CaN signaling opposes BMP signaling during gastrulation, thereby promoting neural induction and the development of anterior structures.
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Affiliation(s)
- Ahryon Cho
- Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Yitai Tang
- Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Jonathan Davila
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Suhua Deng
- Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Lei Chen
- Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Erik Miller
- Department of Genetics, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Marius Wernig
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Isabella A Graef
- Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, USA
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38
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From pluripotency to forebrain patterning: an in vitro journey astride embryonic stem cells. Cell Mol Life Sci 2014; 71:2917-30. [PMID: 24643740 PMCID: PMC4098049 DOI: 10.1007/s00018-014-1596-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 02/17/2014] [Accepted: 02/26/2014] [Indexed: 02/07/2023]
Abstract
Embryonic stem cells (ESCs) have been used extensively as in vitro models of neural development and disease, with special efforts towards their conversion into forebrain progenitors and neurons. The forebrain is the most complex brain region, giving rise to several fundamental structures, such as the cerebral cortex, the hypothalamus, and the retina. Due to the multiplicity of signaling pathways playing different roles at distinct times of embryonic development, the specification and patterning of forebrain has been difficult to study in vivo. Research performed on ESCs in vitro has provided a large body of evidence to complement work in model organisms, but these studies have often been focused more on cell type production than on cell fate regulation. In this review, we systematically reassess the current literature in the field of forebrain development in mouse and human ESCs with a focus on the molecular mechanisms of early cell fate decisions, taking into consideration the specific culture conditions, exogenous and endogenous molecular cues as described in the original studies. The resulting model of early forebrain induction and patterning provides a useful framework for further studies aimed at reconstructing forebrain development in vitro for basic research or therapy.
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Matulka K, Lin HH, Hříbková H, Uwanogho D, Dvořák P, Sun YM. PTP1B Is an Effector of Activin Signaling and Regulates Neural Specification of Embryonic Stem Cells. Cell Stem Cell 2013; 13:706-19. [DOI: 10.1016/j.stem.2013.09.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/10/2013] [Accepted: 09/27/2013] [Indexed: 11/16/2022]
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40
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Chen SM, Lee MS, Chang CY, Lin SZ, Cheng EH, Liu YH, Pan HC, Lee HC, Su HL. Prerequisite OCT4 Maintenance Potentiates the Neural Induction of Differentiating Human Embryonic Stem Cells and Induced Pluripotent Stem Cells. Cell Transplant 2013; 24:829-44. [PMID: 24256943 DOI: 10.3727/096368913x675179] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Establishing an efficient differentiation procedure is prerequisite for the cell transplantation of pluripotent stem cells. Activating fibroblast growth factor (FGF) signals and inhibiting the activin/nodal pathway are both conserved principles to direct the neural induction (NI) of developing embryos and human embryonic stem cells (hESCs). Wnt signal and OCT4 expression are critical for the hESC pluripotency; however, their roles in cell differentiation are largely unclear. We demonstrate that in the presence of FGF2 and activin inhibitor SB431542, applying a small-molecule Wnt agonist, BIO, efficiently and rapidly steers the NI of all our tested hESCs. A human induced pluripotent stem cell (iPSC), which is refractory for efficient neural conversion by FGF2, effectively differentiated to SOX1(+) cells after the BIO/SB431542/FGF2 treatment. In addition, BIO promoted cell survival and transiently sustained OCT4 expression at the early NI stage with FGF2 and SB431542. Interestingly, at the late NI stage, the OCT4 level rapidly declined in the treated hESCs and consequently initiated the formation of neural rosettes with forebrain neuron characteristics. This study illustrates the distinct effects of Wnt activation on maintaining pluripotency and committing neural lineages at the early and late NI stages of hESCs and iPSCs, respectively.
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Affiliation(s)
- Sheng-Mei Chen
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
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41
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Annenkov A. Receptor tyrosine kinase (RTK) signalling in the control of neural stem and progenitor cell (NSPC) development. Mol Neurobiol 2013; 49:440-71. [PMID: 23982746 DOI: 10.1007/s12035-013-8532-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 08/09/2013] [Indexed: 01/04/2023]
Abstract
Important developmental responses are elicited in neural stem and progenitor cells (NSPC) by activation of the receptor tyrosine kinases (RTK), including the fibroblast growth factor receptors, epidermal growth factor receptor, platelet-derived growth factor receptors and insulin-like growth factor receptor (IGF1R). Signalling through these RTK is necessary and sufficient for driving a number of developmental processes in the central nervous system. Within each of the four RTK families discussed here, receptors are activated by sets of ligands that do not cross-activate receptors of the other three families, and therefore, their activation can be independently regulated by ligand availability. These RTK pathways converge on a conserved core of signalling molecules, but differences between the receptors in utilisation of signalling molecules and molecular adaptors for intracellular signal propagation become increasingly apparent. Intracellular inhibitors of RTK signalling are widely involved in the regulation of developmental signalling in NSPC and often determine developmental outcomes of RTK activation. In addition, cellular responses of NSPC to the activation of a given RTK may be significantly modulated by signal strength. Cellular propensity to respond also plays a role in developmental outcomes of RTK signalling. In combination, these mechanisms regulate the balance between NSPC maintenance and differentiation during development and in adulthood. Attribution of particular developmental responses of NSPC to specific pathways of RTK signalling becomes increasingly elucidated. Co-activation of several RTK in developing NSPC is common, and analysis of co-operation between their signalling pathways may advance knowledge of RTK role in NSPC development.
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Affiliation(s)
- Alexander Annenkov
- Bone and Joint Research Unit, William Harvey Research Institute, Bart's and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK,
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42
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Directed differentiation of forebrain GABA interneurons from human pluripotent stem cells. Nat Protoc 2013; 8:1670-9. [PMID: 23928500 DOI: 10.1038/nprot.2013.106] [Citation(s) in RCA: 200] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Forebrain γ-aminobutyric acid (GABA) interneurons have crucial roles in high-order brain function via modulating network activities and plasticity, and they are implicated in many psychiatric disorders. Availability of enriched functional human forebrain GABA interneurons, especially those from people affected by GABA interneuron deficit disease, will be instrumental to the investigation of disease pathogenesis and development of therapeutics. We describe a protocol for directed differentiation of forebrain GABA interneurons from human embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) in a chemically defined system. In this protocol, human PSCs are first induced to primitive neuroepithelial cells over 10 d, and then patterned to NKX2.1-expressing medial ganglionic eminence progenitors by simple treatment with sonic hedgehog or its agonist purmorphamine over the next 2 weeks. These progenitors generate a nearly pure population of forebrain GABA interneurons by the sixth week. This simple and efficient protocol does not require transgenic modification or cell sorting, and it has been replicated with multiple human ESC and iPSC lines.
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Ozair MZ, Noggle S, Warmflash A, Krzyspiak JE, Brivanlou AH. SMAD7 directly converts human embryonic stem cells to telencephalic fate by a default mechanism. Stem Cells 2013; 31:35-47. [PMID: 23034881 DOI: 10.1002/stem.1246] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 08/01/2012] [Indexed: 12/12/2022]
Abstract
Human embryonic stem cells (hESCs) provide a valuable window into the dissection of the molecular circuitry underlying the early formation of the human forebrain. However, dissection of signaling events in forebrain development using current protocols is complicated by non-neural contamination and fluctuation of extrinsic influences. Here, we show that SMAD7, a cell-intrinsic inhibitor of transforming growth factor-β (TGFβ) signaling, is sufficient to directly convert pluripotent hESCs to an anterior neural fate. Time course gene expression revealed downregulation of MAPK components, and combining MEK1/2 inhibition with SMAD7-mediated TGFβ inhibition promoted telencephalic conversion. Fibroblast growth factor-MEK and TGFβ-SMAD signaling maintain hESCs by promoting pluripotency genes and repressing neural genes. Our findings suggest that in the absence of these cues, pluripotent cells simply revert to a program of neural conversion. Hence, the "primed" state of hESCs requires inhibition of the "default" state of neural fate acquisition. This has parallels in amphibians, suggesting an evolutionarily conserved mechanism.
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Affiliation(s)
- Mohammad Zeeshan Ozair
- Laboratory of Molecular Embryology, The Rockefeller University, New York, New York 10065, USA
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44
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Du ZW, Ma LX, Phillips C, Zhang SC. miR-200 and miR-96 families repress neural induction from human embryonic stem cells. Development 2013; 140:2611-8. [PMID: 23637338 DOI: 10.1242/dev.092809] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The role of miRNAs in neuroectoderm specification is largely unknown. We screened miRNA profiles that are differentially changed when human embryonic stem cells (hESCs) were differentiated to neuroectodermal precursors (NEP), but not to epidermal (EPI) cells and found that two miRNA families, miR-200 and miR-96, were uniquely downregulated in the NEP cells. We confirmed zinc-finger E-box-binding homeobox (ZEB) transcription factors as a target of the miR-200 family members and identified paired box 6 (PAX6) transcription factor as the new target of miR-96 family members via gain- and loss-of-function analyses. Given the essential roles of ZEBs and PAX6 in neural induction, we propose a model by which miR-200 and miR-96 families coordinate to regulate neural induction.
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Affiliation(s)
- Zhong-Wei Du
- Department of Neuroscience and Department of Neurology, School of Medicine and Public Health, Waisman Center, University of Wisconsin, Madison, WI 53705, USA
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45
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Liu Y, Weick JP, Liu H, Krencik R, Zhang X, Ma L, Zhou GM, Ayala M, Zhang SC. Medial ganglionic eminence-like cells derived from human embryonic stem cells correct learning and memory deficits. Nat Biotechnol 2013; 31:440-7. [PMID: 23604284 DOI: 10.1038/nbt.2565] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 03/27/2013] [Indexed: 02/07/2023]
Abstract
Dysfunction of basal forebrain cholinergic neurons (BFCNs) and γ-aminobutyric acid (GABA) interneurons, derived from medial ganglionic eminence (MGE), is implicated in disorders of learning and memory. Here we present a method for differentiating human embryonic stem cells (hESCs) to a nearly uniform population of NKX2.1(+) MGE-like progenitor cells. After transplantation into the hippocampus of mice in which BFCNs and some GABA neurons in the medial septum had been destroyed by mu P75-saporin, human MGE-like progenitors, but not ventral spinal progenitors, produced BFCNs that synaptically connected with endogenous neurons, whereas both progenitors generated similar populations of GABA neurons. Mice transplanted with MGE-like but not spinal progenitors showed improvements in learning and memory deficits. These results suggest that progeny of the MGE-like progenitors, particularly BFCNs, contributed to learning and memory. Our findings support the prospect of using human stem cell-derived MGE-like progenitors in developing therapies for neurological disorders of learning and memory.
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Affiliation(s)
- Yan Liu
- Waisman Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
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46
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Lupo G, Novorol C, Smith JR, Vallier L, Miranda E, Alexander M, Biagioni S, Pedersen RA, Harris WA. Multiple roles of Activin/Nodal, bone morphogenetic protein, fibroblast growth factor and Wnt/β-catenin signalling in the anterior neural patterning of adherent human embryonic stem cell cultures. Open Biol 2013; 3:120167. [PMID: 23576785 PMCID: PMC3718331 DOI: 10.1098/rsob.120167] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Several studies have successfully produced a variety of neural cell types from human embryonic stem cells (hESCs), but there has been limited systematic analysis of how different regional identities are established using well-defined differentiation conditions. We have used adherent, chemically defined cultures to analyse the roles of Activin/Nodal, bone morphogenetic protein (BMP), fibroblast growth factor (FGF) and Wnt/β-catenin signalling in neural induction, anteroposterior patterning and eye field specification in hESCs. We show that either BMP inhibition or activation of FGF signalling is required for effective neural induction, but these two pathways have distinct outcomes on rostrocaudal patterning. While BMP inhibition leads to specification of forebrain/midbrain positional identities, FGF-dependent neural induction is associated with strong posteriorization towards hindbrain/spinal cord fates. We also demonstrate that Wnt/β-catenin signalling is activated during neural induction and promotes acquisition of neural fates posterior to forebrain. Therefore, inhibition of this pathway is needed for efficient forebrain specification. Finally, we provide evidence that the levels of Activin/Nodal and BMP signalling have a marked influence on further forebrain patterning and that constitutive inhibition of these pathways represses expression of eye field genes. These results show that the key mechanisms controlling neural patterning in model vertebrate species are preserved in adherent, chemically defined hESC cultures and reveal new insights into the signals regulating eye field specification.
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Affiliation(s)
- Giuseppe Lupo
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
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47
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Sridhar A, Steward MM, Meyer JS. Nonxenogeneic growth and retinal differentiation of human induced pluripotent stem cells. Stem Cells Transl Med 2013; 2:255-64. [PMID: 23512959 DOI: 10.5966/sctm.2012-0101] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Human induced pluripotent stem cells (hiPSCs) possess tremendous potential for the field of regenerative medicine because of their ability to differentiate into any cell type of the body. Such ability has profound implications for translational medicine, because these cells have been implicated for use in cell replacement, disease modeling, and pharmacological screening. However, the translation of established methods for deriving retinal cell types from hiPSCs has been hindered by the use of xenogeneic products for their growth and differentiation. Thus, the ability to derive retinal cell types in the absence of xenogeneic products would represent a significant advancement. The following studies were therefore undertaken to test the ability of hiPSCs to give rise to retinal cells under nonxenogeneic conditions. hiPSCs were maintained in traditional, feeder-free, or xeno-free culture conditions, and their ability to differentiate to a retinal fate was tested. Upon differentiation under all three conditions, cells acquired advancing features of retinal development, eventually yielding cell types of the mature retina. Reverse transcription-polymerase chain reaction and immunocytochemistry confirmed early trends in gene and protein expression patterns in xeno-free derived hiPSCs similar to those in cells derived in mouse embryonic fibroblasts and in feeder-free conditions. Results from this study demonstrate that hiPSCs can be maintained and directed to differentiate into retinal cell types under nonxenogeneic conditions, similar to cells derived using current xenogeneic methodologies. The demonstration of this capability will facilitate future efforts to develop hiPSC-based therapies for retinal disorders and also help to advance in vitro studies of human retinal development.
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Affiliation(s)
- Akshayalakshmi Sridhar
- Department of Biology, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, USA
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48
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Kharazi A, Levy ML, Visperas MC, Lin CM. Chicken embryonic brain: an in vivo model for verifying neural stem cell potency. J Neurosurg 2013; 119:512-9. [PMID: 23451907 DOI: 10.3171/2013.1.jns12698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The multipotency of neural stem cells (NSCs) can be assessed in vitro by detection of stage-specific markers in response to a suitable differentiation signal. This test is frequently used because it is fast and affordable. However, it is not clear how the in vitro potential for multilineage differentiation and stem cell marker expression would reflect the ability of NSCs to engraft into the brain following transplantation. The authors undertook this study to directly compare the in vitro potency and in vivo migration of human NSCs (hNSCs) expanded under conditions of gradually increased concentration of fetal bovine serum (FBS) as a maturation factor. METHODS Human NSCs isolated from fetal brain were propagated in serum free media (SF-hNSCs) and in media containing 0.1% and 0.2% serum. At Passage 4 in tissue culture the NSCs were harvested and either differentiated in vitro or transplanted into the lateral ventricle of chicken embryonic brain at the late stage of its development (Hamburger and Hamilton Stage 26). The in vitro differentiation was evaluated by immunostaining with neural or glial specific markers, and the in vivo migration was assessed using immunohistology. RESULTS The authors found that SF-hNSCs successfully engrafted into the chicken embryonic brain, which correlated with their ability to differentiate in vitro. NSCs grown at as low as 0.1% concentration of FBS failed to demonstrate the robust in vivo migration pattern but still preserved the capability to differentiate in vitro. Furthermore, NSCs generated in media containing a higher concentration of FBS (0.2%) lost both the in vivo engraftment and in vitro differentiation potential. CONCLUSIONS The present study suggests that marker expression and in vitro differentiation assays might not provide adequate information regarding the behavior of NSCs following their transplantation. The in vivo migration following injection into chicken embryonic brain may provide an important assay of the potency of NSCs.
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Affiliation(s)
- Alex Kharazi
- Department of Research and Development, Stemedica Cell Technologies, Inc., San Diego, CA, USA
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49
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Andoniadou CL, Martinez-Barbera JP. Developmental mechanisms directing early anterior forebrain specification in vertebrates. Cell Mol Life Sci 2013; 70:3739-52. [PMID: 23397132 PMCID: PMC3781296 DOI: 10.1007/s00018-013-1269-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 01/10/2013] [Accepted: 01/17/2013] [Indexed: 12/14/2022]
Abstract
Research from the last 15 years has provided a working model for how the anterior forebrain is induced and specified during the early stages of embryogenesis. This model relies on three basic processes: (1) induction of the neural plate from naive ectoderm requires the inhibition of BMP/TGFβ signaling; (2) induced neural tissue initially acquires an anterior identity (i.e., anterior forebrain); (3) maintenance and expansion of the anterior forebrain depends on the antagonism of posteriorizing signals that would otherwise transform this tissue into posterior neural fates. In this review, we present a historical perspective examining some of the significant experiments that have helped to delineate this molecular model. In addition, we discuss the function of the relevant tissues that act prior to and during gastrulation to ensure proper anterior forebrain formation. Finally, we elaborate data, mainly obtained from the analyses of mouse mutants, supporting a role for transcriptional repressors in the regulation of cell competence within the anterior forebrain. The aim of this review is to provide the reader with a general overview of the signals as well as the signaling centers that control the development of the anterior neural plate.
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Affiliation(s)
- Cynthia Lilian Andoniadou
- Birth Defects Research Centre, UCL Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, UK
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50
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Chen J, Sun W, Zheng Y, Xiong H, Cai Y. Bone morphogenetic protein 4, inhibitor of differentiation 1, and epidermal growth factor receptor regulate the survival of cochlear sensory epithelial cells. J Neurosci Res 2013; 91:515-26. [DOI: 10.1002/jnr.23175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/06/2012] [Accepted: 10/13/2012] [Indexed: 12/11/2022]
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