1
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Lin Y, Wu TY, Chen X, Wan S, Chao B, Xin J, Yang JYH, Wong WH, Wang YXR. Data integration and inference of gene regulation using single-cell temporal multimodal data with scTIE. Genome Res 2024; 34:119-133. [PMID: 38190633 PMCID: PMC10903952 DOI: 10.1101/gr.277960.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 12/13/2023] [Indexed: 01/10/2024]
Abstract
Single-cell technologies offer unprecedented opportunities to dissect gene regulatory mechanisms in context-specific ways. Although there are computational methods for extracting gene regulatory relationships from scRNA-seq and scATAC-seq data, the data integration problem, essential for accurate cell type identification, has been mostly treated as a standalone challenge. Here we present scTIE, a unified method that integrates temporal multimodal data and infers regulatory relationships predictive of cellular state changes. scTIE uses an autoencoder to embed cells from all time points into a common space by using iterative optimal transport, followed by extracting interpretable information to predict cell trajectories. Using a variety of synthetic and real temporal multimodal data sets, we show scTIE achieves effective data integration while preserving more biological signals than existing methods, particularly in the presence of batch effects and noise. Furthermore, on the exemplar multiome data set we generated from differentiating mouse embryonic stem cells over time, we show scTIE captures regulatory elements highly predictive of cell transition probabilities, providing new potentials to understand the regulatory landscape driving developmental processes.
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Affiliation(s)
- Yingxin Lin
- School of Mathematics and Statistics, The University of Sydney, NSW 2006, Australia
- Charles Perkins Centre, The University of Sydney, NSW 2006, Australia
- Laboratory of Data Discovery for Health Limited (D24H), Science Park, Hong Kong SAR 999077, China
| | - Tung-Yu Wu
- Department of Statistics, Stanford University, Stanford, California 94305-4020, USA
| | - Xi Chen
- Department of Statistics, Stanford University, Stanford, California 94305-4020, USA
| | - Sheng Wan
- Institute of Electronics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Brian Chao
- Department of Electrical Engineering, Stanford University, Stanford, California 94305-9505, USA
| | - Jingxue Xin
- Department of Statistics, Stanford University, Stanford, California 94305-4020, USA
| | - Jean Y H Yang
- School of Mathematics and Statistics, The University of Sydney, NSW 2006, Australia
- Charles Perkins Centre, The University of Sydney, NSW 2006, Australia
- Laboratory of Data Discovery for Health Limited (D24H), Science Park, Hong Kong SAR 999077, China
| | - Wing H Wong
- Department of Statistics, Stanford University, Stanford, California 94305-4020, USA;
- Department of Biomedical Data Science, Stanford University, Stanford, California 94305-5464, USA
- Bio-X Program, Stanford University, Stanford, California 94305, USA
| | - Y X Rachel Wang
- School of Mathematics and Statistics, The University of Sydney, NSW 2006, Australia;
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2
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Alsobaie S, Alsobaie T, Alshammary AF, Abudawood M, Mantalaris A. Alginate Beads as a Promising Tool for Successful Production of Viable and Pluripotent Human-Induced Pluripotent Stem Cells in a 3D Culture System. Stem Cells Cloning 2023; 16:61-73. [PMID: 37790697 PMCID: PMC10544263 DOI: 10.2147/sccaa.s409139] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/13/2023] [Indexed: 10/05/2023] Open
Abstract
Purpose Two-dimensional (2D)-based cell culture systems, limited by their inherent heterogeneity and scalability, are a bottleneck in the production of high-quality cells for downstream biomedical applications. Finding the optimal conditions for large-scale stem cell culture while maintaining good cellular status is challenging. The aim of this study was to assess the effects of three-dimensional (3D) culture on the viability, proliferation, self-renewal, and differentiation of human induced pluripotent stem cells (IPSCs). Patients and Methods Various culture conditions were evaluated to determine the optimal conditions to maintain the viability and proliferation of human IPSCs in a 3D environment: static versus dynamic culture, type of adhesion protein added to alginate (Matrigel™ versus gelatin), and the addition of Y-27632t on long-term 3D culture. The proliferation ability of the cells was evaluated via the MTS proliferation assay; the expression levels of the pluripotency markers Nanog and Oct3/4, PAX6 as an ectoderm marker, and laminin-5 and fibronectin as markers of extracellular matrix synthesis were assessed; and HIF1α and HIF2α levels were measured using quantitative reverse transcription polymerase chain reaction. Results Using a high-aspect-ratio vessel bioreactor with a gentle, low-sheer, and low-turbulence environment with sufficient oxygenation and effective mass transfer of nutrients and waste, we verified its ability to promote cell proliferation and self-renewal. The findings showed that human IPSCs have the ability to maintain pluripotency in a feeder-free system and by inhibiting ROCK signaling and using hypoxia to improve single-cell viability in 3D culture. Furthermore, these cells demonstrated increased self-renewal and proliferation when inoculated as single cells in 3D alginate beads by adding RI during the culture period. Conclusion Dynamic 3D culture is desirable for the large-scale expansion of undifferentiated human IPSCs.
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Affiliation(s)
- Sarah Alsobaie
- Department of Clinical Laboratory Science, King Saud University, Riyadh, Saudi Arabia
| | - Tamador Alsobaie
- Biological Systems Engineering Laboratory, Department of Chemical Engineering, Imperial College London, London, UK
| | - Amal F Alshammary
- Department of Clinical Laboratory Science, King Saud University, Riyadh, Saudi Arabia
| | - Manal Abudawood
- Department of Clinical Laboratory Science, King Saud University, Riyadh, Saudi Arabia
| | - Athanasios Mantalaris
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
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3
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Dinarello A, Betto RM, Diamante L, Tesoriere A, Ghirardo R, Cioccarelli C, Meneghetti G, Peron M, Laquatra C, Tiso N, Martello G, Argenton F. STAT3 and HIF1α cooperatively mediate the transcriptional and physiological responses to hypoxia. Cell Death Discov 2023; 9:226. [PMID: 37407568 DOI: 10.1038/s41420-023-01507-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/04/2023] [Accepted: 06/20/2023] [Indexed: 07/07/2023] Open
Abstract
STAT3 and HIF1α are two fundamental transcription factors involved in many merging processes, like angiogenesis, metabolism, and cell differentiation. Notably, under pathological conditions, the two factors have been shown to interact genetically, but both the molecular mechanisms underlying such interactions and their relevance under physiological conditions remain unclear. In mouse embryonic stem cells (ESCs) we manage to determine the specific subset of hypoxia-induced genes that need STAT3 to be properly transcribed and, among them, fundamental genes like Vegfa, Hk1, Hk2, Pfkp and Hilpda are worth mentioning. Unexpectedly, we also demonstrated that the absence of STAT3 does not affect the expression of Hif1α mRNA nor the stabilization of HIF1α protein, but the STAT3-driven regulation of the hypoxia-dependent subset of gene could rely on the physical interaction between STAT3 and HIF1α. To further elucidate the physiological roles of this STAT3 non-canonical nuclear activity, we used a CRISPR/Cas9 zebrafish stat3 knock-out line. Notably, hypoxia-related fluorescence of the hypoxia zebrafish reporter line (HRE:mCherry) cannot be induced when Stat3 is not active and, while Stat3 Y705 phosphorylation seems to have a pivotal role in this process, S727 does not affect the Stat3-dependent hypoxia response. Hypoxia is fundamental for vascularization, angiogenesis and immune cells mobilization; all processes that, surprisingly, cannot be induced by low oxygen levels when Stat3 is genetically ablated. All in all, here we report the specific STAT3/HIF1α-dependent subset of genes in vitro and, for the first time with an in vivo model, we determined some of the physiological roles of STAT3-hypoxia crosstalk.
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Affiliation(s)
| | | | - Linda Diamante
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | | | | | | | | | | | - Claudio Laquatra
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Natascia Tiso
- Department of Biology, University of Padova, Padova, Italy
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4
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Lin Y, Wu TY, Chen X, Wan S, Chao B, Xin J, Yang JY, Wong WH, Wang YXR. scTIE: data integration and inference of gene regulation using single-cell temporal multimodal data. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.18.541381. [PMID: 37292801 PMCID: PMC10245711 DOI: 10.1101/2023.05.18.541381] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Single-cell technologies offer unprecedented opportunities to dissect gene regulatory mechanisms in context-specific ways. Although there are computational methods for extracting gene regulatory relationships from scRNA-seq and scATAC-seq data, the data integration problem, essential for accurate cell type identification, has been mostly treated as a standalone challenge. Here we present scTIE, a unified method that integrates temporal multimodal data and infers regulatory relationships predictive of cellular state changes. scTIE uses an autoencoder to embed cells from all time points into a common space using iterative optimal transport, followed by extracting interpretable information to predict cell trajectories. Using a variety of synthetic and real temporal multimodal datasets, we demonstrate scTIE achieves effective data integration while preserving more biological signals than existing methods, particularly in the presence of batch effects and noise. Furthermore, on the exemplar multiome dataset we generated from differentiating mouse embryonic stem cells over time, we demonstrate scTIE captures regulatory elements highly predictive of cell transition probabilities, providing new potentials to understand the regulatory landscape driving developmental processes.
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Affiliation(s)
- Yingxin Lin
- School of Mathematics and Statistics, The University of Sydney, NSW, Australia
- Charles Perkins Centre, The University of Sydney, NSW, Australia
- Laboratory of Data Discovery for Health Limited (D24H), Science Park, Hong Kong SAR, China
| | - Tung-Yu Wu
- Department of Statistics, Stanford University, CA, USA
| | - Xi Chen
- Department of Statistics, Stanford University, CA, USA
| | - Sheng Wan
- Institute of Electronics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Brian Chao
- Department of Electrical Engineering, Stanford University, CA, USA
| | - Jingxue Xin
- Department of Statistics, Stanford University, CA, USA
| | - Jean Y.H. Yang
- School of Mathematics and Statistics, The University of Sydney, NSW, Australia
- Charles Perkins Centre, The University of Sydney, NSW, Australia
- Laboratory of Data Discovery for Health Limited (D24H), Science Park, Hong Kong SAR, China
| | - Wing H. Wong
- Department of Statistics, Stanford University, CA, USA
- Department of Biomedical Data Science, Stanford University, CA, USA
- Bio-X Program, Stanford University, CA, USA
| | - Y. X. Rachel Wang
- School of Mathematics and Statistics, The University of Sydney, NSW, Australia
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5
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López-Anguita N, Gassaloglu SI, Stötzel M, Bolondi A, Conkar D, Typou M, Buschow R, Veenvliet JV, Bulut-Karslioglu A. Hypoxia induces an early primitive streak signature, enhancing spontaneous elongation and lineage representation in gastruloids. Development 2022; 149:276626. [PMID: 36102628 PMCID: PMC9578691 DOI: 10.1242/dev.200679] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 08/03/2022] [Indexed: 11/20/2022]
Abstract
The cellular microenvironment, together with intrinsic regulators, shapes stem cell identity and differentiation capacity. Mammalian early embryos are exposed to hypoxia in vivo and appear to benefit from hypoxic culture in vitro. Yet, how hypoxia influences stem cell transcriptional networks and lineage choices remain poorly understood. Here, we investigated the molecular effects of acute and prolonged hypoxia on embryonic and extra-embryonic stem cells as well as the functional impact on differentiation potential. We find a temporal and cell type-specific transcriptional response including an early primitive streak signature in hypoxic embryonic stem cells mediated by HIF1α. Using a 3D gastruloid differentiation model, we show that hypoxia-induced T expression enables symmetry breaking and axial elongation in the absence of exogenous WNT activation. When combined with exogenous WNT activation, hypoxia enhances lineage representation in gastruloids, as demonstrated by highly enriched signatures of gut endoderm, notochord, neuromesodermal progenitors and somites. Our findings directly link the microenvironment to stem cell function and provide a rationale supportive of applying physiological conditions in models of embryo development.
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Affiliation(s)
- Natalia López-Anguita
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
- Institute of Chemistry and Biochemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin 2 , 14195 Berlin , Germany
| | - Seher Ipek Gassaloglu
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
- Stembryogenesis Lab, Max Planck Institute of Molecular Cell Biology and Genetics 3 , 01307 Dresden , Germany
| | - Maximilian Stötzel
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
- Institute of Chemistry and Biochemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin 2 , 14195 Berlin , Germany
| | - Adriano Bolondi
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
- Institute of Chemistry and Biochemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin 2 , 14195 Berlin , Germany
| | - Deniz Conkar
- Stembryogenesis Lab, Max Planck Institute of Molecular Cell Biology and Genetics 3 , 01307 Dresden , Germany
| | - Marina Typou
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
- Medical School, Democritus University of Thrace 4 , 681 00 Alexandroupoli , Greece
- Department of Biomedical Sciences, International Hellenic University 5 , 570 01, Thessaloniki , Greece
| | - René Buschow
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
| | - Jesse V. Veenvliet
- Stembryogenesis Lab, Max Planck Institute of Molecular Cell Biology and Genetics 3 , 01307 Dresden , Germany
- Cluster of Excellence Physics of Life, Technische Universität Dresden 6 , 01307 Dresden , Germany
| | - Aydan Bulut-Karslioglu
- Department of Genome Regulation, Max Planck Institute for Molecular Genetics 1 , 14195 Berlin , Germany
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6
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Shen X, Li M, Wang C, Liu Z, Wu K, Wang A, Bi C, Lu S, Long H, Zhu G. Hypoxia is fine-tuned by Hif-1α and regulates mesendoderm differentiation through the Wnt/β-Catenin pathway. BMC Biol 2022; 20:219. [PMID: 36199093 PMCID: PMC9536055 DOI: 10.1186/s12915-022-01423-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 09/28/2022] [Indexed: 11/10/2022] Open
Abstract
Background Hypoxia naturally happens in embryogenesis and thus serves as an important environmental factor affecting embryo development. Hif-1α, an essential hypoxia response factor, was mostly considered to mediate or synergistically regulate the effect of hypoxia on stem cells. However, the function and relationship of hypoxia and Hif-1α in regulating mesendoderm differentiation remains controversial. Results We here discovered that hypoxia dramatically suppressed the mesendoderm differentiation and promoted the ectoderm differentiation of mouse embryonic stem cells (mESCs). However, hypoxia treatment after mesendoderm was established promoted the downstream differentiation of mesendoderm-derived lineages. These effects of hypoxia were mediated by the repression of the Wnt/β-Catenin pathway and the Wnt/β-Catenin pathway was at least partially regulated by the Akt/Gsk3β axis. Blocking the Wnt/β-Catenin pathway under normoxia using IWP2 mimicked the effects of hypoxia while activating the Wnt/β-Catenin pathway with CHIR99021 fully rescued the mesendoderm differentiation suppression caused by hypoxia. Unexpectedly, Hif-1α overexpression, in contrast to hypoxia, promoted mesendoderm differentiation and suppressed ectoderm differentiation. Knockdown of Hif-1α under normoxia and hypoxia both inhibited the mesendoderm differentiation. Moreover, hypoxia even suppressed the mesendoderm differentiation of Hif-1α knockdown mESCs, further implying that the effects of hypoxia on the mesendoderm differentiation were Hif-1α independent. Consistently, the Wnt/β-Catenin pathway was enhanced by Hif-1α overexpression and inhibited by Hif-1α knockdown. As shown by RNA-seq, unlike hypoxia, the effect of Hif-1α was relatively mild and selectively regulated part of hypoxia response genes, which fine-tuned the effect of hypoxia on mESC differentiation. Conclusions This study revealed that hypoxia is fine-tuned by Hif-1α and regulates the mesendoderm and ectoderm differentiation by manipulating the Wnt/β-Catenin pathway, which contributed to the understanding of hypoxia-mediated regulation of development. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01423-y.
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Affiliation(s)
- Xiaopeng Shen
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China. .,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China. .,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.
| | - Meng Li
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Chunguang Wang
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Zhongxian Liu
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Kun Wu
- Institute of Evolution and Marine Biodiversity, KLMME, Ocean University of China, Qingdao, 266003, Shandong, China
| | - Ao Wang
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Chao Bi
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Shan Lu
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
| | - Hongan Long
- Institute of Evolution and Marine Biodiversity, KLMME, Ocean University of China, Qingdao, 266003, Shandong, China
| | - Guoping Zhu
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.,Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China
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7
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Khadim RR, Vadivelu RK, Utami T, Torizal FG, Nishikawa M, Sakai Y. Integrating Oxygen and 3D Cell Culture System: A Simple Tool to Elucidate the Cell Fate Decision of hiPSCs. Int J Mol Sci 2022; 23:ijms23137272. [PMID: 35806277 PMCID: PMC9266965 DOI: 10.3390/ijms23137272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 11/23/2022] Open
Abstract
Oxygen, as an external environmental factor, plays a role in the early differentiation of human stem cells, such as induced pluripotent stem cells (hiPSCs). However, the effect of oxygen concentration on the early-stage differentiation of hiPSC is not fully understood, especially in 3D aggregate cultures. In this study, we cultivated the 3D aggregation of hiPSCs on oxygen-permeable microwells under different oxygen concentrations ranging from 2.5 to 20% and found that the aggregates became larger, corresponding to the increase in oxygen level. In a low oxygen environment, the glycolytic pathway was more profound, and the differentiation markers of the three germ layers were upregulated, suggesting that the oxygen concentration can function as a regulator of differentiation during the early stage of development. In conclusion, culturing stem cells on oxygen-permeable microwells may serve as a platform to investigate the effect of oxygen concentration on diverse cell fate decisions during development.
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Affiliation(s)
- Rubina Rahaman Khadim
- Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan; (T.U.); (F.G.T.); (Y.S.)
- Correspondence: (R.R.K.); (R.K.V.)
| | - Raja Kumar Vadivelu
- Department of Chemical System Engineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan;
- Human Biomimetic System, RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research (CPR), Wako 351-0198, Saitama, Japan
- Correspondence: (R.R.K.); (R.K.V.)
| | - Tia Utami
- Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan; (T.U.); (F.G.T.); (Y.S.)
| | - Fuad Gandhi Torizal
- Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan; (T.U.); (F.G.T.); (Y.S.)
| | - Masaki Nishikawa
- Department of Chemical System Engineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan;
| | - Yasuyuki Sakai
- Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan; (T.U.); (F.G.T.); (Y.S.)
- Department of Chemical System Engineering, Graduate School of Engineering, University of Tokyo, Hongo, Tokyo 113-8654, Japan;
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8
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Mennen RH, Oldenburger MM, Piersma AH. Endoderm and mesoderm derivatives in embryonic stem cell differentiation and their use in developmental toxicity testing. Reprod Toxicol 2021; 107:44-59. [PMID: 34861400 DOI: 10.1016/j.reprotox.2021.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 02/06/2023]
Abstract
Embryonic stem cell differentiation models have increasingly been applied in non-animal test systems for developmental toxicity. After the initial focus on cardiac differentiation, attention has also included an array of neuro-ectodermal differentiation routes. Alternative differentiation routes in the mesodermal and endodermal germ lines have received less attention. This review provides an inventory of achievements in the latter areas of embryonic stem cell differentiation, with a view to possibilities for their use in non-animal test systems in developmental toxicology. This includes murine and human stem cell differentiation models, and also gains information from the field of stem cell use in regenerative medicine. Endodermal stem cell derivatives produced in vitro include hepatocytes, pancreatic cells, lung epithelium, and intestinal epithelium, and mesodermal derivatives include cardiac muscle, osteogenic, vascular and hemopoietic cells. This inventory provides an overview of studies on the different cell types together with biomarkers and culture conditions that stimulate these differentiation routes from embryonic stem cells. These models may be used to expand the spectrum of embryonic stem cell based new approach methodologies in non-animal developmental toxicity testing.
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Affiliation(s)
- R H Mennen
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, the Netherlands.
| | | | - A H Piersma
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, the Netherlands
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9
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Bessi BW, Botigelli RC, Pieri NCG, Machado LS, Cruz JB, de Moraes P, de Souza AF, Recchia K, Barbosa G, de Castro RVG, Nogueira MFG, Bressan FF. Cattle In Vitro Induced Pluripotent Stem Cells Generated and Maintained in 5 or 20% Oxygen and Different Supplementation. Cells 2021; 10:cells10061531. [PMID: 34204517 PMCID: PMC8234940 DOI: 10.3390/cells10061531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/07/2021] [Accepted: 06/15/2021] [Indexed: 12/11/2022] Open
Abstract
The event of cellular reprogramming into pluripotency is influenced by several factors, such as in vitro culture conditions (e.g., culture medium and oxygen concentration). Herein, bovine iPSCs (biPSCs) were generated in different levels of oxygen tension (5% or 20% of oxygen) and supplementation (bFGF or bFGF + LIF + 2i-bFL2i) to evaluate the efficiency of pluripotency induction and maintenance in vitro. Initial reprogramming was observed in all groups and bFL2i supplementation initially resulted in a superior number of colonies. However, bFL2i supplementation in low oxygen led to a loss of self-renewal and pluripotency maintenance. All clonal lines were positive for alkaline phosphatase; they expressed endogenous pluripotency-related genes SOX2, OCT4 and STELLA. However, expression was decreased throughout the passages without the influence of oxygen tension. GLUT1 and GLUT3 were upregulated by low oxygen. The biPSCs were immunofluorescence-positive stained for OCT4 and SOX2 and they formed embryoid bodies which differentiated in ectoderm and mesoderm (all groups), as well as endoderm (one line from bFL2i in high oxygen). Our study is the first to compare high and low oxygen environments during and after induced reprogramming in cattle. In our conditions, a low oxygen environment did not favor the pluripotency maintenance of biPSCs.
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Affiliation(s)
- Brendon Willian Bessi
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Ramon Cesar Botigelli
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
- Department of Pharmacology, Institute of Biosciences (IBB), São Paulo State University (UNESP), Botucatu 18618-689, Brazil
- Correspondence: (R.C.B.); (F.F.B.)
| | - Naira Caroline Godoy Pieri
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
- Department of Animal Reproduction, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo (USP), São Paulo 05508-270, Brazil
| | - Lucas Simões Machado
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Jessica Brunhara Cruz
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Pamela de Moraes
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Aline Fernanda de Souza
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Kaiana Recchia
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Gabriela Barbosa
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
| | - Raquel Vasconcelos Guimarães de Castro
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
- Department of Pathology, Reproduction and One Health, Faculty of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Botucatu 14884-900, Brazil
| | - Marcelo Fábio Gouveia Nogueira
- Department of Biological Science, School of Sciences, Humanities and Languages, São Paulo State University (UNESP), Assis 19806-900, Brazil;
| | - Fabiana Fernandes Bressan
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga 13635-000, Brazil; (B.W.B.); (N.C.G.P.); (L.S.M.); (J.B.C.); (P.d.M.); (A.F.d.S.); (K.R.); (G.B.); (R.V.G.d.C.)
- Correspondence: (R.C.B.); (F.F.B.)
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10
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Xu J, Wu S, Wang J, Wang J, Yan Y, Zhu M, Zhang D, Jiang C, Liu T. Oxidative stress induced by NOX2 contributes to neuropathic pain via plasma membrane translocation of PKCε in rat dorsal root ganglion neurons. J Neuroinflammation 2021; 18:106. [PMID: 33952299 PMCID: PMC8101139 DOI: 10.1186/s12974-021-02155-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/21/2021] [Indexed: 11/10/2022] Open
Abstract
Background Nicotinamide adenine dinucleotide phosphate oxidase 2 (NOX2)-induced oxidative stress, including the production of reactive oxygen species (ROS) and hydrogen peroxide, plays a pivotal role in neuropathic pain. Although the activation and plasma membrane translocation of protein kinase C (PKC) isoforms in dorsal root ganglion (DRG) neurons have been implicated in multiple pain models, the interactions between NOX2-induced oxidative stress and PKC remain unknown. Methods A spared nerve injury (SNI) model was established in adult male rats. Pharmacologic intervention and AAV-shRNA were applied locally to DRGs. Pain behavior was evaluated by Von Frey tests. Western blotting and immunohistochemistry were performed to examine the underlying mechanisms. The excitability of DRG neurons was recorded by whole-cell patch clamping. Results SNI induced persistent NOX2 upregulation in DRGs for up to 2 weeks and increased the excitability of DRG neurons, and these effects were suppressed by local application of gp91-tat (a NOX2-blocking peptide) or NOX2-shRNA to DRGs. Of note, the SNI-induced upregulated expression of PKCε but not PKC was decreased by gp91-tat in DRGs. Mechanical allodynia and DRG excitability were increased by ψεRACK (a PKCε activator) and reduced by εV1-2 (a PKCε-specific inhibitor). Importantly, εV1-2 failed to inhibit SNI-induced NOX2 upregulation. Moreover, the SNI-induced increase in PKCε protein expression in both the plasma membrane and cytosol in DRGs was attenuated by gp91-tat pretreatment, and the enhanced translocation of PKCε was recapitulated by H2O2 administration. SNI-induced upregulation of PKCε was blunted by phenyl-N-tert-butylnitrone (PBN, an ROS scavenger) and the hydrogen peroxide catalyst catalase. Furthermore, εV1-2 attenuated the mechanical allodynia induced by H2O2 Conclusions NOX2-induced oxidative stress promotes the sensitization of DRGs and persistent pain by increasing the plasma membrane translocation of PKCε. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02155-6.
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Affiliation(s)
- Jing Xu
- Center for Experimental Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Shinan Wu
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Junfei Wang
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Jianmei Wang
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Yi Yan
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Mengye Zhu
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Daying Zhang
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Changyu Jiang
- Jisheng Han Academician Workstation for Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, Guangdong, China
| | - Tao Liu
- Center for Experimental Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China. .,Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China. .,Jisheng Han Academician Workstation for Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, Guangdong, China.
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11
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Aquaporins implicated in the cell proliferation and the signaling pathways of cell stemness. Biochimie 2021; 188:52-60. [PMID: 33894294 DOI: 10.1016/j.biochi.2021.04.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/11/2021] [Accepted: 04/16/2021] [Indexed: 12/20/2022]
Abstract
Aquaporins (AQPs) are water channel proteins facilitating passive transport of water and other small molecules across biomembranes. Regulation of osmotic homeostasis via AQPs is accompanied by dynamic participation of various cellular signaling pathways. Recently emerging evidence reveals that functional roles of AQPs are further extended from the osmotic regulation via water permeation into the cell proliferation and differentiation. In particular, anomalous expression of AQPs has been demonstrated in various types of cancer cells and cancer stem-like cells and it has been proposed as markers for proliferation and progression of cancer cells. Thus, a more comprehensive view on AQPs could bring a great interest in the cell stemness accompanied by the expression of AQPs. AQPs are broadly expressed across tissues and cells in a cell type- and lineage-specific manner during development via spatiotemporal transcriptional regulation. Moreover, AQPs are expressed in various adult stem cells and cells associated with a stem cell niche as well as cancer stem-like cells. However, the expression and regulatory mechanisms of AQP expression in stem cells have not been well understood. This review highlighted the AQPs expression in stem cell niches/stem cells and the involvement of AQPs in the cell proliferation and signaling pathways associated with cell stemness.
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12
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Fritsche E, Haarmann-Stemmann T, Kapr J, Galanjuk S, Hartmann J, Mertens PR, Kämpfer AAM, Schins RPF, Tigges J, Koch K. Stem Cells for Next Level Toxicity Testing in the 21st Century. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006252. [PMID: 33354870 DOI: 10.1002/smll.202006252] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/13/2020] [Indexed: 06/12/2023]
Abstract
The call for a paradigm change in toxicology from the United States National Research Council in 2007 initiates awareness for the invention and use of human-relevant alternative methods for toxicological hazard assessment. Simple 2D in vitro systems may serve as first screening tools, however, recent developments infer the need for more complex, multicellular organotypic models, which are superior in mimicking the complexity of human organs. In this review article most critical organs for toxicity assessment, i.e., skin, brain, thyroid system, lung, heart, liver, kidney, and intestine are discussed with regards to their functions in health and disease. Embracing the manifold modes-of-action how xenobiotic compounds can interfere with physiological organ functions and cause toxicity, the need for translation of such multifaceted organ features into the dish seems obvious. Currently used in vitro methods for toxicological applications and ongoing developments not yet arrived in toxicity testing are discussed, especially highlighting the potential of models based on embryonic stem cells and induced pluripotent stem cells of human origin. Finally, the application of innovative technologies like organs-on-a-chip and genome editing point toward a toxicological paradigm change moves into action.
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Affiliation(s)
- Ellen Fritsche
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
- Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, 40225, Germany
| | | | - Julia Kapr
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Saskia Galanjuk
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Julia Hartmann
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Peter R Mertens
- Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke-University Magdeburg, Magdeburg, 39106, Germany
| | - Angela A M Kämpfer
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Roel P F Schins
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Julia Tigges
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Katharina Koch
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
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13
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In Vitro Induction of Pluripotency from Equine Fibroblasts in 20% or 5% Oxygen. Stem Cells Int 2020; 2020:8814989. [PMID: 33456472 PMCID: PMC7785345 DOI: 10.1155/2020/8814989] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/15/2020] [Accepted: 10/21/2020] [Indexed: 12/16/2022] Open
Abstract
The cellular reprogramming into pluripotency is influenced by external and internal cellular factors, such as in vitro culture conditions (e.g., environmental oxygen concentration), and the aging process. Herein, we aimed to generate and maintain equine iPSCs (eiPSCs) derived from fibroblasts of a horse older than 20 years and to evaluate the effect of different levels of oxygen tension (atmospheric 20% O2, 5% O2, or 20% to 5% O2) on these cells. Fibroblasts were reprogrammed, and putative eiPSCs were positive for positive alkaline phosphatase detection; they were positive for pluripotency-related genes OCT4, REX1, and NANOG; immunofluorescence-positive staining was presented for OCT4 and NANOG (all groups), SOX2 (groups 5% O2 and 20% to 5% O2), and TRA-1-60, TRA-1-81, and SSEA-1 (only in 20% O2); they formed embryoid bodies; and there is spontaneous differentiation in mesoderm, endoderm, and ectoderm embryonic germ layers. In addition to the differences in immunofluorescence analysis results, the eiPSC colonies generated at 20% O2 presented a more compact morphology with a well-defined border than cells cultured in 5% O2 and 20% to 5% O2. Significant differences were also observed in the expression of genes related to glucose metabolism, mitochondrial fission, and hypoxia (GAPDH, GLUT3, MFN1, HIF1α, and HIF2α), after reprogramming. Our results show that the derivation of eiPSCs was not impaired by aging. Additionally, this study is the first to compare high and low oxygen cultures of eiPSCs, showing the generation of pluripotent cells with different profiles. Under the tested conditions, the lower oxygen tension did not favor the pluripotency of eiPSCs. This study shows that the impact of oxygen atmosphere has to be considered when culturing eiPSCs, as this condition influences the pluripotency characteristics.
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14
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Kawakita N, Toba H, Miyoshi K, Sakamoto S, Matsumoto D, Takashima M, Aoyama M, Inoue S, Morimoto M, Nishino T, Takizawa H, Tangoku A. Bronchioalveolar stem cells derived from mouse-induced pluripotent stem cells promote airway epithelium regeneration. Stem Cell Res Ther 2020; 11:430. [PMID: 33008488 PMCID: PMC7531137 DOI: 10.1186/s13287-020-01946-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/20/2020] [Indexed: 12/20/2022] Open
Abstract
Background Bronchioalveolar stem cells (BASCs) located at the bronchioalveolar-duct junction (BADJ) are stem cells residing in alveoli and terminal bronchioles that can self-renew and differentiate into alveolar type (AT)-1 cells, AT-2 cells, club cells, and ciliated cells. Following terminal-bronchiole injury, BASCs increase in number and promote repair. However, whether BASCs can be differentiated from mouse-induced pluripotent stem cells (iPSCs) remains unreported, and the therapeutic potential of such cells is unclear. We therefore sought to differentiate BASCs from iPSCs and examine their potential for use in the treatment of epithelial injury in terminal bronchioles. Methods BASCs were induced using a modified protocol for differentiating mouse iPSCs into AT-2 cells. Differentiated iPSCs were intratracheally transplanted into naphthalene-treated mice. The engraftment of BASCs into the BADJ and their subsequent ability to promote repair of injury to the airway epithelium were evaluated. Results Flow cytometric analysis revealed that BASCs represented ~ 7% of the cells obtained. Additionally, ultrastructural analysis of these iPSC-derived BASCs via transmission electron microscopy showed that the cells containing secretory granules harboured microvilli, as well as small and immature lamellar body-like structures. When the differentiated iPSCs were intratracheally transplanted in naphthalene-induced airway epithelium injury, transplanted BASCs were found to be engrafted in the BADJ epithelium and alveolar spaces for 14 days after transplantation and to maintain the BASC phenotype. Notably, repair of the terminal-bronchiole epithelium was markedly promoted after transplantation of the differentiated iPSCs. Conclusions Mouse iPSCs could be differentiated in vitro into cells that display a similar phenotype to BASCs. Given that the differentiated iPSCs promoted epithelial repair in the mouse model of naphthalene-induced airway epithelium injury, this method may serve as a basis for the development of treatments for terminal-bronchiole/alveolar-region disorders.
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Affiliation(s)
- Naoya Kawakita
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hiroaki Toba
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan.
| | - Keiko Miyoshi
- Department of Molecular Biology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Shinichi Sakamoto
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Daisuke Matsumoto
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Mika Takashima
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Mariko Aoyama
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Seiya Inoue
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Masami Morimoto
- Department of Breast Surgery, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - Takeshi Nishino
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hiromitsu Takizawa
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Akira Tangoku
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
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15
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Oss-Ronen L, Redden RA, Lelkes PI. Enhanced Induction of Definitive Endoderm Differentiation of Mouse Embryonic Stem Cells in Simulated Microgravity. Stem Cells Dev 2020; 29:1275-1284. [PMID: 32731794 DOI: 10.1089/scd.2020.0097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Directed in vitro differentiation of pluripotent stem cells toward definitive endoderm (DE) offers great research and therapeutic potential since these cells can further differentiate into cells of the respiratory and gastrointestinal tracts, as well as associated organs such as pancreas, liver, and thyroid. We hypothesized that culturing mouse embryonic stem cells (mESCs) under simulated microgravity (SMG) conditions in rotary bioreactors (BRs) will enhance the induction of directed DE differentiation. To test our hypothesis, we cultured the cells for 6 days in two-dimensional monolayer colony cultures or as embryoid bodies (EBs) in either static conditions or, dynamically, in the rotary BRs. We used flow cytometry and quantitative polymerase chain reaction to analyze the expression of marker proteins and genes, respectively, for pluripotency (Oct3/4) and mesendodermal (Brachyury T), endodermal (FoxA2, Sox17, CxCr4), and mesodermal (Vimentin, Meox1) lineages. Culture in the form of EBs in maintenance media in the presence of leukemia inhibitory factor, in static or SMG conditions, induced expression of some of the differentiation markers, suggesting heterogeneity of the cells. This is in line with previous studies showing that differentiation is initiated as cells are aggregated into EBs even without supplementing differentiation factors to the media. Culturing EBs in static conditions in differentiation media (DM) in the presence of activin A reduced Oct3/4 expression and significantly increased Brachyury T and CxCr4 expression, but downregulated FoxA2 and Sox17. However, culturing in SMG BRs in DM upregulated Brachyury T and all of the DE markers and reduced Oct3/4 expression, indicating the advantage of dynamic cultures in BRs to specifically enhance directed DE differentiation. Given the potential discrepancies between the SMG conditions on earth and actual microgravity conditions, as observed in other studies, future experiments in space flight are required to validate the effects of reduced gravity on mESC differentiation.
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Affiliation(s)
- Liat Oss-Ronen
- Department of Bioengineering, College of Engineering, Temple University, Philadelphia, Pennsylvania, USA
| | - Robert A Redden
- Department of Bioengineering, College of Engineering, Temple University, Philadelphia, Pennsylvania, USA
| | - Peter I Lelkes
- Department of Bioengineering, College of Engineering, Temple University, Philadelphia, Pennsylvania, USA
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16
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Farzaneh Z, Abbasalizadeh S, Asghari-Vostikolaee MH, Alikhani M, Cabral JMS, Baharvand H. Dissolved oxygen concentration regulates human hepatic organoid formation from pluripotent stem cells in a fully controlled bioreactor. Biotechnol Bioeng 2020; 117:3739-3756. [PMID: 32725885 DOI: 10.1002/bit.27521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/11/2020] [Accepted: 07/27/2020] [Indexed: 12/11/2022]
Abstract
Developing technologies for scalable production of human organoids has gained increased attention for "organoid medicine" and drug discovery. We developed a scalable and integrated differentiation process for generation of hepatic organoid from human pluripotent stem cells (hPSCs) in a fully controlled stirred tank bioreactor with 150 ml working volume by application of physiological oxygen concentrations in different liver tissue zones. We found that the 20-40% dissolved oxygen concentration [DO] (corresponded to 30-60 mmHg pO2 within the liver tissue) significantly influences the process outcome via regulating the differentiation fate of hPSC aggregates by enhancing mesoderm induction. Regulation of the [DO] at 30% DO resulted in efficient generation of human fetal-like hepatic organoids that had a uniform size distribution and were comprised of red blood cells and functional hepatocytes, which exhibited improved liver-specific marker gene expressions, key liver metabolic functions, and, more important, higher inducible cytochrome P450 activity compared to the other trials. These hepatic organoids were successfully engrafted in an acute liver injury mouse model and produced albumin after implantation. These results demonstrated the significant impact of the dissolved oxygen concentration on hPSC hepatic differentiation fate and differentiation efficacy that should be considered ascritical translational aspect of established scalable liver organoid generation protocols for potential clinical and drug discovery applications.
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Affiliation(s)
- Zahra Farzaneh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Saeed Abbasalizadeh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Bioengineering and IBB - Institute for Bioengineering and Biosciences, Institute Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Mohammad-Hassan Asghari-Vostikolaee
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Mehdi Alikhani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Joaquim M S Cabral
- Department of Bioengineering and IBB - Institute for Bioengineering and Biosciences, Institute Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - 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, Tehran, Iran
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17
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Mennen RH, de Leeuw VC, Piersma AH. Oxygen tension influences embryonic stem cell maintenance and has lineage specific effects on neural and cardiac differentiation. Differentiation 2020; 115:1-10. [PMID: 32738735 DOI: 10.1016/j.diff.2020.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/08/2020] [Indexed: 02/06/2023]
Abstract
The importance of oxygen tension in in vitro cultures and its effect on embryonic stem cell (ESC) differentiation has been widely acknowledged. Research has mainly focussed on ESC maintenance or on one line of differentiation and only few studies have examined the potential relation between oxygen tension during ESC maintenance and differentiation. In this study we investigated the influence of atmospheric (20%) versus physiologic (5%) oxygen tension in ESC cultures and their differentiation within the cardiac and neural embryonic stem cell tests (ESTc, ESTn). Oxygen tension was set at 5% or 20% and cells were kept in these conditions from starting up cell culture until use for differentiation. Under these oxygen tensions, ESC culture showed no differences in proliferation and gene and protein expression levels. Differentiation was either performed in the same or in the alternative oxygen tension compared to ESC culture creating four different experimental conditions. Cardiac differentiation in 5% instead of 20% oxygen resulted in reduced development of spontaneously beating cardiomyocytes and lower expression of cardiac markers Nkx2.5, Myh6 and MF20 (myosin), regardless whether ESC had been cultured in 5% or 20% oxygen tension. As compared to the control (20% oxygen during stem cell maintenance and differentiation), neural differentiation in 5% oxygen with ESC cultured in 20% oxygen led to more cardiac and neural crest cell differentiation. The opposite experimental condition of neural differentiation in 20% oxygen with ESC cultured in 5% oxygen resulted in more glial differentiation. ESC that were maintained and differentiated in 5% oxygen showed an increase in neural crest and oligodendrocytes as compared to 20% oxygen during stem cell maintenance and differentiation. This study showed major effects on ESC differentiation in ESTc and ESTn of oxygen tension, which is an important variable to consider when designing and developing a stem cell-based in vitro system.
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Affiliation(s)
- Regina H Mennen
- Center for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, the Netherlands.
| | - Victoria C de Leeuw
- Center for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, the Netherlands
| | - Aldert H Piersma
- Center for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, the Netherlands
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18
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Lee HY, Hong IS. Metabolic Regulation and Related Molecular Mechanisms in Various Stem Cell Functions. Curr Stem Cell Res Ther 2020; 15:531-546. [PMID: 32394844 DOI: 10.2174/1574888x15666200512105347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/11/2020] [Accepted: 03/02/2020] [Indexed: 02/07/2023]
Abstract
Recent studies on the mechanisms that link metabolic changes with stem cell fate have deepened our understanding of how specific metabolic pathways can regulate various stem cell functions during the development of an organism. Although it was originally thought to be merely a consequence of the specific cell state, metabolism is currently known to play a critical role in regulating the self-renewal capacity, differentiation potential, and quiescence of stem cells. Many studies in recent years have revealed that metabolic pathways regulate various stem cell behaviors (e.g., selfrenewal, migration, and differentiation) by modulating energy production through glycolysis or oxidative phosphorylation and by regulating the generation of metabolites, which can modulate multiple signaling pathways. Therefore, a more comprehensive understanding of stem cell metabolism could allow us to establish optimal culture conditions and differentiation methods that would increase stem cell expansion and function for cell-based therapies. However, little is known about how metabolic pathways regulate various stem cell functions. In this context, we review the current advances in metabolic research that have revealed functional roles for mitochondrial oxidative phosphorylation, anaerobic glycolysis, and oxidative stress during the self-renewal, differentiation and aging of various adult stem cell types. These approaches could provide novel strategies for the development of metabolic or pharmacological therapies to promote the regenerative potential of stem cells and subsequently promote their therapeutic utility.
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Affiliation(s)
- Hwa-Yong Lee
- Department of Biomedical Science, Jungwon University, 85 Goesan-eup, Munmu-ro, Goesan-gun, Chungcheongbuk-do 367-700, Korea
| | - In-Sun Hong
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
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Studies on Conditioned Media in Human Cells: Evaluation Using Various Cell and Culture Conditions, Animal Disease Models. JOURNAL OF ANIMAL REPRODUCTION AND BIOTECHNOLOGY 2018. [DOI: 10.12750/jet.2018.33.1.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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20
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Dahan P, Lu V, Nguyen RMT, Kennedy SAL, Teitell MA. Metabolism in pluripotency: Both driver and passenger? J Biol Chem 2018; 294:5420-5429. [PMID: 29463682 DOI: 10.1074/jbc.tm117.000832] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Pluripotent stem cells (PSCs) are highly proliferative cells characterized by robust metabolic demands to power rapid division. For many years considered a passive component or "passenger" of cell-fate determination, cell metabolism is now starting to take center stage as a driver of cell fate outcomes. This review provides an update and analysis of our current understanding of PSC metabolism and its role in self-renewal, differentiation, and somatic cell reprogramming to pluripotency. Moreover, we present evidence on the active roles metabolism plays in shaping the epigenome to influence patterns of gene expression that may model key features of early embryonic development.
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Affiliation(s)
- Perrine Dahan
- From the Departments of Pathology and Laboratory Medicine and
| | - Vivian Lu
- Molecular and Medical Pharmacology and
| | | | - Stephanie A L Kennedy
- From the Departments of Pathology and Laboratory Medicine and.,the Department of Biology, California State University at Northridge, Northridge, California 91330
| | - Michael A Teitell
- From the Departments of Pathology and Laboratory Medicine and .,the California NanoSystems Institute.,Department of Bioengineering, and.,Molecular Biology Institute, UCLA, Los Angeles, California 90095, and.,Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, UCLA, Los Angeles, California 90095.,the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, UCLA, Los Angeles, California 90095
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21
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Yoon DK, Park JS, Rho GJ, Lee HJ, Sung IY, Son JH, Park BW, Kang YH, Byun SH, Hwang SC, Woo DK, Cho YC, Byun JH. The involvement of histone methylation in osteoblastic differentiation of human periosteum-derived cells cultured in vitro under hypoxic conditions. Cell Biochem Funct 2017; 35:441-452. [PMID: 29082591 DOI: 10.1002/cbf.3302] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 08/10/2017] [Accepted: 09/01/2017] [Indexed: 12/19/2022]
Abstract
Although oxygen concentrations affect the growth and function of mesenchymal stem cells (MSCs), the impact of hypoxia on osteoblastic differentiation is not understood. Likewise, the effect of hypoxia-induced epigenetic changes on osteoblastic differentiation of MSCs is unknown. The aim of this study was to examine the in vitro hypoxic response of human periosteum-derived cells (hPDCs). Hypoxia resulted in greater proliferation of hPDCs as compared with those cultured in normoxia. Further, hypoxic conditions yielded decreased expression of apoptosis- and senescence-associated genes by hPDCs. Osteoblast phenotypes of hPDCS were suppressed by hypoxia, as suggested by alkaline phosphatase activity, alizarin red-S-positive mineralization, and mRNA expression of osteoblast-related genes. Chromatin immunoprecipitation assays showed an increased presence of H3K27me3, trimethylation of lysine 27 on histone H3, on the promoter region of bone morphogenetic protein-2. In addition, mRNA expression of histone lysine demethylase 6B (KDM6B) by hPDCs was significantly decreased in hypoxic conditions. Our results suggest that an increased level of H3K27me3 on the promoter region of bone morphogenetic protein-2, in combination with downregulation of KDM6B activity, is involved in the suppression of osteogenic phenotypes of hPDCs cultured in hypoxic conditions. Although oxygen tension plays an important role in the viability and maintenance of MSCs in an undifferentiated state, the effect of hypoxia on osteoblastic differentiation of MSCs remains controversial. In addition, evidence regarding the importance of epigenetics in regulating MSCs has been limited. This study was to examine the role hypoxia on osteoblastic differentiation of hPDCs, and we examined whether histone methylation is involved in the observed effect of hypoxia on osteogenic differentiation of hPDCs.
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Affiliation(s)
- Dae-Kwan Yoon
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, South Korea
| | - Ji-Sung Park
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Gyu-Jin Rho
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Hyeon-Jeong Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Iel-Yong Sung
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, South Korea
| | - Jang-Ho Son
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, South Korea
| | - Bong-Wook Park
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
| | - Young-Hoon Kang
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
| | - Sung-Hoon Byun
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
| | - Sun-Chul Hwang
- Department of Orthopaedic Surgery, Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, South Korea
| | - Dong Kyun Woo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju, South Korea
| | - Yeong-Cheol Cho
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, South Korea
| | - June-Ho Byun
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
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22
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Physiological oxygen tension reduces hepatocyte dedifferentiation in in vitro culture. Sci Rep 2017; 7:5923. [PMID: 28724942 PMCID: PMC5517567 DOI: 10.1038/s41598-017-06433-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 06/12/2017] [Indexed: 12/31/2022] Open
Abstract
Primary hepatocytes cultured in vitro are a powerful tool to study the functions of hepatocytes and to evaluate the metabolism and toxicity of new drugs. However, in vitro culture of hepatocytes has proven to be very difficult. Ordinary culture conditions lead to dedifferentiation of hepatocytes, resulting in rapid change in cell morphology and significant reduction in specific cell functions. In the current study, we show that hepatocyte dedifferentiation is a rapid process under 21% O2 conditions. Hepatocytes cultured in 21% O2 undergo epithelial-to-mesenchymal transition (EMT), obtain fibroblast-like morphology, and show decreased hepatic functions. In contrast, 5% O2 is very effective in maintaining the epithelial morphology and many functions of the primary hepatocytes cultured in vitro for up to five days. These functions include albumin production, glycogen storage, LDL-uptake and CYP450-mediated drug metabolism. Furthermore, we find that 5% O2 can relieve the production of reactive oxygen species (ROS) and decrease the level of DNA damage in primary cultured hepatocytes. In addition, we also show that blocking the ERK and GSK-3β pathways can inhibit the dedifferentiation of hepatocytes to a certain extent. Lowering the oxygen tension in cell culture is easily achievable, we believe it could be combined with other methods, such as the use of small molecule cocktails and 3D culture, to maintain proliferation and functions of primary hepatocytes in vitro.
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23
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Pluripotent Stem Cell Metabolism and Mitochondria: Beyond ATP. Stem Cells Int 2017; 2017:2874283. [PMID: 28804500 PMCID: PMC5540363 DOI: 10.1155/2017/2874283] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/07/2017] [Indexed: 12/19/2022] Open
Abstract
Metabolism is central to embryonic stem cell (ESC) pluripotency and differentiation, with distinct profiles apparent under different nutrient milieu, and conditions that maintain alternate cell states. The significance of altered nutrient availability, particularly oxygen, and metabolic pathway activity has been highlighted by extensive studies of their impact on preimplantation embryo development, physiology, and viability. ESC similarly modulate their metabolism in response to altered metabolite levels, with changes in nutrient availability shown to have a lasting impact on derived cell identity through the regulation of the epigenetic landscape. Further, the preferential use of glucose and anaplerotic glutamine metabolism serves to not only support cell growth and proliferation but also minimise reactive oxygen species production. However, the perinuclear localisation of spherical, electron-poor mitochondria in ESC is proposed to sustain ESC nuclear-mitochondrial crosstalk and a mitochondrial-H2O2 presence, to facilitate signalling to support self-renewal through the stabilisation of HIFα, a process that may be favoured under physiological oxygen. The environment in which a cell is grown is therefore a critical regulator and determinant of cell fate, with metabolism, and particularly mitochondria, acting as an interface between the environment and the epigenome.
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24
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Yu Y, Lin L, Zhou Y, Lu X, Shao X, Lin C, Yu K, Zhang X, Hong J, Chen Y. Effect of Hypoxia on Self-Renewal Capacity and Differentiation in Human Tendon-Derived Stem Cells. Med Sci Monit 2017; 23:1334-1339. [PMID: 28302994 PMCID: PMC5367841 DOI: 10.12659/msm.903892] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background Hypoxic conditions play roles in functioning of human tendon-derived stem cells (hTSCs). The goal of this study was to investigate the effect of various hypoxic conditions in self-renewal capacity and differentiation of TSCs. Material/Methods hTSCs was obtain from supraspinatus tendon donors. Colony formation and cell proliferation assay were used to assess the self-renewal of hTSCs. qRT-PCT and Western blot analysis were used to examine stemness and multi-differentiation potential of hTSCs. Results We found that culturing at 5% O2 is more beneficial for the self-renewal of hTSCs than the other 3 culture conditions, with larger colony size and numbers. The proliferation of hTSCs in 5%, 10%, and 20% O2 cultures increased after seeding. The number of cells in the 5% O2 condition was higher than that in other culture; however, self-renewal capacity of hTSCs in 0.5% O2 was inhibited. The expression levels of stem cell markers, including NS, Nanog, Oct-4, and SSEA-4, were highest in 0.5% O2 culture. Furthermore, hTSCs cultured in 20% O2 exhibited significantly higher expression of the 3 markers (PPAR-γ, Sox-9, and Runx-2). Conclusions Hypoxic condition of culture encouraged self-renewal capacity of hTSCs, but inhibited their multi-differentiation potential, compared to normoxic condition of culture. Moreover, excessively low oxygen concentration impaired the capacity of hTSCs.
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Affiliation(s)
- Yang Yu
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Lixiang Lin
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Yifei Zhou
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Xiaolang Lu
- Department of Orthopaedic Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Xiwen Shao
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Chuanlu Lin
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Kehe Yu
- Department of Orthopaedic Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Xiaolei Zhang
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Jianjun Hong
- Department of Orthopaedics Surgery, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
| | - Ying Chen
- Department of Emergency Medicine, The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China (mainland)
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25
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Effect of Hypoxia on the Differentiation and the Self-Renewal of Metanephrogenic Mesenchymal Stem Cells. Stem Cells Int 2017; 2017:7168687. [PMID: 28194187 PMCID: PMC5282446 DOI: 10.1155/2017/7168687] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 11/24/2016] [Accepted: 12/07/2016] [Indexed: 12/31/2022] Open
Abstract
Hypoxia is an important and influential factor in development. The embryonic kidney is exposed to a hypoxic environment throughout its development. The Wnt/β-catenin pathway plays vital roles in the differentiation and self-renewal of metanephrogenic mesenchymal stem cells (MMSCs) from which the kidney is derived. Thus, we hypothesized that hypoxia can regulate the differentiation and pluripotency of MMSCs through the Wnt/β-catenin pathway. To test this hypothesis, MMSCs from rats at embryonic day 18.5 were cultured in normoxic (21% O2) and hypoxic (1% O2) conditions. The effects of hypoxia on differentiation, stemness, proliferation, and apoptosis of cultured MMSCs and on the activity of the Wnt/β-catenin pathway were tested. Our results revealed that the hypoxic condition increased the number of epithelial cells (E-cadherin+ or CK18+) as well the expression of markers of renal tubule epithelia cells (CDH6, Aqp1, and OPN), decreased the number and proliferation of stem cells (SIX-2+ or CITED1+), and induced apoptosis. Additionally, hypoxia reduced the expression of Wnt4 as well as its downstream molecules β-catenin, LEF-1, and Axin2. Activation of the Wnt/β-catenin pathway by LiCl or BIO modified the effects of hypoxia on the differentiation and self-renewal of MMSCs. Thus, we concluded that hypoxia induces the differentiation and inhibits the self-renewal of MMSCs by inhibiting the Wnt/β-catenin pathway. The observations further our understanding of the effects of hypoxia on kidney.
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26
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Nonaka PN, Uriarte JJ, Campillo N, Oliveira VR, Navajas D, Farré R. Lung bioengineering: physical stimuli and stem/progenitor cell biology interplay towards biofabricating a functional organ. Respir Res 2016; 17:161. [PMID: 27894293 PMCID: PMC5126992 DOI: 10.1186/s12931-016-0477-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 11/22/2016] [Indexed: 01/18/2023] Open
Abstract
A current approach to obtain bioengineered lungs as a future alternative for transplantation is based on seeding stem cells on decellularized lung scaffolds. A fundamental question to be solved in this approach is how to drive stem cell differentiation onto the different lung cell phenotypes. Whereas the use of soluble factors as agents to modulate the fate of stem cells was established from an early stage of the research with this type of cells, it took longer to recognize that the physical microenvironment locally sensed by stem cells (e.g. substrate stiffness, 3D architecture, cyclic stretch, shear stress, air-liquid interface, oxygenation gradient) also contributes to their differentiation. The potential role played by physical stimuli would be particularly relevant in lung bioengineering since cells within the organ are physiologically subjected to two main stimuli required to facilitate efficient gas exchange: air ventilation and blood perfusion across the organ. The present review focuses on describing how the cell mechanical microenvironment can modulate stem cell differentiation and how these stimuli could be incorporated into lung bioreactors for optimizing organ bioengineering.
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Affiliation(s)
- Paula N Nonaka
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain
| | - Juan J Uriarte
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain
| | - Noelia Campillo
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain
| | - Vinicius R Oliveira
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain
| | - Daniel Navajas
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain.,CIBER Enfermedades Respiratorias, Madrid, Spain.,Institut de Bioenginyeria de Catalunya, Barcelona, Spain
| | - Ramon Farré
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, 08036, Barcelona, Spain. .,CIBER Enfermedades Respiratorias, Madrid, Spain. .,Institut d'Investigacions Biomèdiques August Pi Sunyer, Barcelona, Spain.
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27
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Yang D, Wang J, Xiao M, Zhou T, Shi X. Role of Mir-155 in Controlling HIF-1α Level and Promoting Endothelial Cell Maturation. Sci Rep 2016; 6:35316. [PMID: 27731397 PMCID: PMC5059686 DOI: 10.1038/srep35316] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 09/28/2016] [Indexed: 01/03/2023] Open
Abstract
Stem-cell-based therapy for cardiovascular disease, especially ischemic heart disease (IHD), is a promising approach to facilitating neovascularization through the migration of stem cells to the ischemic site and their subsequent differentiation into endothelial cells (ECs). Hypoxia is a chief feature of IHD and the stem cell niche. However, whether hypoxia promotes stem cell differentiation into ECs or causes them to retain their stemness is controversial. Here, the differentiation of pluripotent stem cells (iPSCs) into endothelial cells (ECs) was induced under hypoxia. Though the angiogenic capability and angiogenesis-related autocrine/paracrine factors of the ECs were improved under hypoxia, the level of hypoxia inducible factor 1α (HIF-1α) was nonetheless found to be restricted along with the EC differentiation. The down-regulation of HIF-1α was found to have been caused by VEGF-induced microRNA-155 (miR-155). Moreover, miR-155 was also found to enhance the angiogenic capability of induced ECs by targeting E2F2 transcription factor. Hence, miR-155 not only contributes to controlling HIF-1α expression under hypoxia but also promotes angiogenesis, which is a key feature of mature ECs. Revealing the real role of hypoxia and clarifying the function of miR-155 in EC differentiation may facilitate improvement of angiogenic gene- and stem-cell-based therapies for ischemic heart disease.
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Affiliation(s)
- Deguang Yang
- Department of Cardiology, the Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, China
| | - Jinhong Wang
- Department of Respiration, the Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, China
| | - Meng Xiao
- Department of Nursing, the Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, China
| | - Tao Zhou
- Department of Cardiology, the Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, China
| | - Xu Shi
- Central Laboratory, the First Hospital of Jilin University, Changchun, 130032, China
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28
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Chu LF, Leng N, Zhang J, Hou Z, Mamott D, Vereide DT, Choi J, Kendziorski C, Stewart R, Thomson JA. Single-cell RNA-seq reveals novel regulators of human embryonic stem cell differentiation to definitive endoderm. Genome Biol 2016; 17:173. [PMID: 27534536 PMCID: PMC4989499 DOI: 10.1186/s13059-016-1033-x] [Citation(s) in RCA: 239] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 07/27/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Human pluripotent stem cells offer the best available model to study the underlying cellular and molecular mechanisms of human embryonic lineage specification. However, it is not fully understood how individual stem cells exit the pluripotent state and transition towards their respective progenitor states. RESULTS Here, we analyze the transcriptomes of human embryonic stem cell-derived lineage-specific progenitors by single-cell RNA-sequencing (scRNA-seq). We identify a definitive endoderm (DE) transcriptomic signature that leads us to pinpoint a critical time window when DE differentiation is enhanced by hypoxia. The molecular mechanisms governing the emergence of DE are further examined by time course scRNA-seq experiments, employing two new statistical tools to identify stage-specific genes over time (SCPattern) and to reconstruct the differentiation trajectory from the pluripotent state through mesendoderm to DE (Wave-Crest). Importantly, presumptive DE cells can be detected during the transitory phase from Brachyury (T) (+) mesendoderm toward a CXCR4 (+) DE state. Novel regulators are identified within this time window and are functionally validated on a screening platform with a T-2A-EGFP knock-in reporter engineered by CRISPR/Cas9. Through loss-of-function and gain-of-function experiments, we demonstrate that KLF8 plays a pivotal role modulating mesendoderm to DE differentiation. CONCLUSIONS We report the analysis of 1776 cells by scRNA-seq covering distinct human embryonic stem cell-derived progenitor states. By reconstructing a differentiation trajectory at single-cell resolution, novel regulators of the mesendoderm transition to DE are elucidated and validated. Our strategy of combining single-cell analysis and genetic approaches can be applied to uncover novel regulators governing cell fate decisions in a variety of systems.
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Affiliation(s)
- Li-Fang Chu
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA.
| | - Ning Leng
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA.,Present address: Genentech, Inc., South San Francisco, CA, USA
| | - Jue Zhang
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA
| | - Zhonggang Hou
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA.,Present address: Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Daniel Mamott
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA
| | - David T Vereide
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA
| | - Jeea Choi
- Department of Statistics, University of Wisconsin, Madison, WI, USA
| | - Christina Kendziorski
- Department of Biostatistics and Medical Informatics, University of Wisconsin, Madison, WI, USA
| | - Ron Stewart
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA
| | - James A Thomson
- Regenerative Biology, Morgridge Institute for Research, Madison, WI, 53715, USA. .,Department of Cell & Regenerative Biology, University of Wisconsin-Madison, Madison, WI, USA. .,Department of Molecular, Cellular, & Developmental Biology, University of California, Santa Barbara, CA, USA.
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