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Gallego Villarejo L, Gerding WM, Bachmann L, Hardt LHI, Bormann S, Nguyen HP, Müller T. Optical Genome Mapping Reveals Genomic Alterations upon Gene Editing in hiPSCs: Implications for Neural Tissue Differentiation and Brain Organoid Research. Cells 2024; 13:507. [PMID: 38534351 DOI: 10.3390/cells13060507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/02/2024] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
Genome editing, notably CRISPR (cluster regularly interspaced short palindromic repeats)/Cas9 (CRISPR-associated protein 9), has revolutionized genetic engineering allowing for precise targeted modifications. This technique's combination with human induced pluripotent stem cells (hiPSCs) is a particularly valuable tool in cerebral organoid (CO) research. In this study, CRISPR/Cas9-generated fluorescently labeled hiPSCs exhibited no significant morphological or growth rate differences compared with unedited controls. However, genomic aberrations during gene editing necessitate efficient genome integrity assessment methods. Optical genome mapping, a high-resolution genome-wide technique, revealed genomic alterations, including chromosomal copy number gain and losses affecting numerous genes. Despite these genomic alterations, hiPSCs retain their pluripotency and capacity to generate COs without major phenotypic changes but one edited cell line showed potential neuroectodermal differentiation impairment. Thus, this study highlights optical genome mapping in assessing genome integrity in CRISPR/Cas9-edited hiPSCs emphasizing the need for comprehensive integration of genomic and morphological analysis to ensure the robustness of hiPSC-based models in cerebral organoid research.
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Affiliation(s)
- Lucia Gallego Villarejo
- Department of Molecular Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
- Department of Cytology, Institute of Anatomy, Ruhr-University Bochum, 44801 Bochum, Germany
- International Graduate School of Neuroscience, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Wanda M Gerding
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Lisa Bachmann
- Department of Molecular Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Luzie H I Hardt
- Department of Molecular Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Stefan Bormann
- Department of Molecular Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Huu Phuc Nguyen
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Thorsten Müller
- Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital, LMU Munich, 80336 Munich, Germany
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2
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Nogueira IPM, Costa GMJ, Lacerda SMDSN. Avian iPSC Derivation to Recover Threatened Wild Species: A Comprehensive Review in Light of Well-Established Protocols. Animals (Basel) 2024; 14:220. [PMID: 38254390 PMCID: PMC10812705 DOI: 10.3390/ani14020220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/24/2024] Open
Abstract
Induced pluripotent stem cells (iPSCs) were first generated by Yamanaka in 2006, revolutionizing research by overcoming limitations imposed by the use of embryonic stem cells. In terms of the conservation of endangered species, iPSC technology presents itself as a viable alternative for the manipulation of target genetics without compromising specimens. Although iPSCs have been successfully generated for various species, their application in nonmammalian species, particularly avian species, requires further in-depth investigation to cover the diversity of wild species at risk and their different protocol requirements. This study aims to provide an overview of the workflow for iPSC induction, comparing well-established protocols in humans and mice with the limited information available for avian species. Here, we discuss the somatic cell sources to be reprogrammed, genetic factors, delivery methods, enhancers, a brief history of achievements in avian iPSC derivation, the main approaches for iPSC characterization, and the future perspectives and challenges for the field. By examining the current protocols and state-of-the-art techniques employed in iPSC generation, we seek to contribute to the development of efficient and species-specific iPSC methodologies for at-risk avian species. The advancement of iPSC technology holds great promise for achieving in vitro germline competency and, consequently, addressing reproductive challenges in endangered species, providing valuable tools for basic research, bird genetic preservation and rescue, and the establishment of cryobanks for future conservation efforts.
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Affiliation(s)
| | | | - Samyra Maria dos Santos Nassif Lacerda
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (I.P.M.N.); (G.M.J.C.)
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3
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Shifa ul Haq H, Ashfaq R, Mehmood A, Shahid W, Azam G, Azam M, Tasneem S, Akram SJ, Malik K, Riazuddin S. Priming with caffeic acid enhances the potential and survival ability of human adipose-derived stem cells to counteract hypoxia. Regen Ther 2023; 22:115-127. [PMID: 36751276 PMCID: PMC9883200 DOI: 10.1016/j.reth.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/27/2022] [Accepted: 01/04/2023] [Indexed: 01/26/2023] Open
Abstract
The therapeutic effectiveness of stem cells after transplantation is hampered by the hypoxic milieu of chronic wounds. Prior research has established antioxidant priming as a thorough plan to improve stem cell performance. The purpose of this study was to ascertain how caffeic acid (CA) priming affected the ability of human adipose-derived stem cells (hASCs) to function under hypoxic stress. In order to study the cytoprotective properties of CA, hASCs were primed with CA in CoCl2 hypoxic conditions. Microscopy was used to assess cell morphology, while XTT, Trypan Blue, X-gal, LDH, Live Dead, scratch wound healing, and ROS assays were used to analyze viability, senescence, cell death, proliferation, and reactive oxygen species prevalence in the cells. According to our findings, CA priming enhances hASCs' ability to survive and regenerate in a hypoxic microenvironment more effectively than untreated hASCs. Our in-vitro research suggested that pre-treatment with CA of hASCs could be a unique way to enhance their therapeutic efficacy and ability to survive in hypoxic microenvironments.
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Affiliation(s)
- H.M. Shifa ul Haq
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Ramla Ashfaq
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
- Genome Editing Lab, Food Biotechnology Research Center, Pakistan Council of Scientific and Industrial Research (PCSIR) Laboratory Complex, Lahore, 54600, Pakistan
| | - Azra Mehmood
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Warda Shahid
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Ghufran Azam
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Maryam Azam
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Saba Tasneem
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | | | - Kausar Malik
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
| | - Sheikh Riazuddin
- National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, University of Punjab, Lahore, 53700, Pakistan
- Jinnah Burn & Reconstructive Surgery Centre, Allama Iqbal Medical College, University of Health Sciences, Lahore, Pakistan
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4
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Riggs MJ, Sheridan SD, Rao RR. ARHGDIA Confers Selective Advantage to Dissociated Human Pluripotent Stem Cells. Stem Cells Dev 2021; 30:705-713. [PMID: 34036793 PMCID: PMC8309423 DOI: 10.1089/scd.2021.0079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Human pluripotent stem cells (hPSCs) have generated significant interest in the scientific community based on their potential applications in regenerative medicine. However, numerous research groups have reported a propensity for genomic alterations during hPSC culture that poses concerns for basic research and clinical applications. Work from our laboratory and others has demonstrated that amplification of chromosomal regions is correlated with increased gene expression. To date, the phenotypic association of common genomic alterations remains unclear and is a cause for concern during clinical use. In this study, we focus on trisomy 17 and a list of candidate genes with increased gene expression to hypothesize that overexpressing 17q25 located ARHGDIA will confer selective advantage to hPSCs. HPSC lines overexpressing ARHGDIA exhibited culture dominance in co-cultures of overexpression lines with nonoverexpression lines. Furthermore, during low-density seeding, we demonstrate increased clonality of our ARHGDIA lines against matched controls. A striking observation is that we could reduce this selective advantage by varying the hPSC culture conditions with the addition of ROCK inhibitor (ROCKi). This work is unique in (1) demonstrating a novel gene that confers selective advantage to hPSCs when overexpressed and may help explain a common trisomy dominance, (2) providing a selection model for studying culture conditions that reduce the appearance of genomically altered hPSCs, and (3) aiding in elucidation of a mechanism that may act as a molecular switch during culture adaptation.
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Affiliation(s)
- Marion J Riggs
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia, USA.,Center for Genomic Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Neurology, Harvard Medical School, Boston, Massachusetts, USA
| | - Steven D Sheridan
- Center for Quantitative Health, Center for Genomic Medicine and Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
| | - Raj R Rao
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia, USA.,Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas, USA
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5
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Functional in vivo and in vitro effects of 20q11.21 genetic aberrations on hPSC differentiation. Sci Rep 2020; 10:18582. [PMID: 33122739 PMCID: PMC7596514 DOI: 10.1038/s41598-020-75657-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 10/15/2020] [Indexed: 01/01/2023] Open
Abstract
Human pluripotent stem cells (hPSCs) have promising therapeutic applications due to their infinite capacity for self-renewal and pluripotency. Genomic stability is imperative for the clinical use of hPSCs; however, copy number variation (CNV), especially recurrent CNV at 20q11.21, may contribute genomic instability of hPSCs. Furthermore, the effects of CNVs in hPSCs at the whole-transcriptome scale are poorly understood. This study aimed to examine the functional in vivo and in vitro effects of frequently detected CNVs at 20q11.21 during early-stage differentiation of hPSCs. Comprehensive transcriptome profiling of abnormal hPSCs revealed that the differential gene expression patterns had a negative effect on differentiation potential. Transcriptional heterogeneity identified by single-cell RNA sequencing (scRNA-seq) of embryoid bodies from two different isogenic lines of hPSCs revealed alterations in differentiated cell distributions compared with that of normal cells. RNA-seq analysis of 22 teratomas identified several differentially expressed lineage-specific markers in hPSCs with CNVs, consistent with the histological results of the altered ecto/meso/endodermal ratio due to CNVs. Our results suggest that CNV amplification contributes to cell proliferation, apoptosis, and cell fate specification. This work shows the functional consequences of recurrent genetic abnormalities and thereby provides evidence to support the development of cell-based applications.
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6
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Li XL, Li GH, Fu J, Fu YW, Zhang L, Chen W, Arakaki C, Zhang JP, Wen W, Zhao M, Chen WV, Botimer GD, Baylink D, Aranda L, Choi H, Bechar R, Talbot P, Sun CK, Cheng T, Zhang XB. Highly efficient genome editing via CRISPR-Cas9 in human pluripotent stem cells is achieved by transient BCL-XL overexpression. Nucleic Acids Res 2019; 46:10195-10215. [PMID: 30239926 PMCID: PMC6212847 DOI: 10.1093/nar/gky804] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 08/28/2018] [Indexed: 12/12/2022] Open
Abstract
Genome editing of human induced pluripotent stem cells (iPSCs) is instrumental for functional genomics, disease modeling, and regenerative medicine. However, low editing efficiency has hampered the applications of CRISPR–Cas9 technology in creating knockin (KI) or knockout (KO) iPSC lines, which is largely due to massive cell death after electroporation with editing plasmids. Here, we report that the transient delivery of BCL-XL increases iPSC survival by ∼10-fold after plasmid transfection, leading to a 20- to 100-fold increase in homology-directed repair (HDR) KI efficiency and a 5-fold increase in non-homologous end joining (NHEJ) KO efficiency. Treatment with a BCL inhibitor ABT-263 further improves HDR efficiency by 70% and KO efficiency by 40%. The increased genome editing efficiency is attributed to higher expressions of Cas9 and sgRNA in surviving cells after electroporation. HDR or NHEJ efficiency reaches 95% with dual editing followed by selection of cells with HDR insertion of a selective gene. Moreover, KO efficiency of 100% can be achieved in a bulk population of cells with biallelic HDR KO followed by double selection, abrogating the necessity for single cell cloning. Taken together, these simple yet highly efficient editing strategies provide useful tools for applications ranging from manipulating human iPSC genomes to creating gene-modified animal models.
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Affiliation(s)
- Xiao-Lan Li
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | - Guo-Hua Li
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | - Juan Fu
- Liaoning Provincial Key Laboratory of Cerebral Diseases, Institute for Brain Disorders, Dalian Medical University, Dalian 116044, China.,Department of Obstetrics and Gynecology, the First Affiliated Hospital of Dalian Medical University, Dalian 116044, China
| | - Ya-Wen Fu
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | - Lu Zhang
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | - Wanqiu Chen
- Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Cameron Arakaki
- Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Jian-Ping Zhang
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China.,CAMS Key Laboratory of Gene Therapy for Blood Diseases, Tianjin 300020, China
| | - Wei Wen
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | - Mei Zhao
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China
| | | | - Gary D Botimer
- Department of Orthopaedic Surgery, Loma Linda University, Loma Linda, CA 92350, USA
| | - David Baylink
- Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Leslie Aranda
- Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Hannah Choi
- Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Rachel Bechar
- UCR Stem Cell Center and Core, University of California at Riverside, Riverside, CA 92521, USA
| | - Prue Talbot
- UCR Stem Cell Center and Core, University of California at Riverside, Riverside, CA 92521, USA
| | - Chang-Kai Sun
- Liaoning Provincial Key Laboratory of Cerebral Diseases, Institute for Brain Disorders, Dalian Medical University, Dalian 116044, China.,Research & Educational Center for the Control Engineering of Translational Precision Medicine (R-ECCE-TPM), School of Biomedical Engineering, Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China.,State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China.,Research & Educational Center for the Control Engineering of Translational Precision Medicine (R-ECCE-TPM), School of Biomedical Engineering, Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China.,Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin 300020, China.,Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China.,Collaborative Innovation Center for Cancer Medicine, Tianjin 300020, China
| | - Xiao-Bing Zhang
- State Key Laboratory of Experimental Hematology, Tianjin 300020, China.,Institute of Hematology and Blood Disease Hospital, Tianjin 300020, China.,Department of Medicine, Loma Linda University, Loma Linda, CA 92350, USA.,Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin 300020, China.,Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
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7
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Attwood SW, Edel MJ. iPS-Cell Technology and the Problem of Genetic Instability-Can It Ever Be Safe for Clinical Use? J Clin Med 2019; 8:E288. [PMID: 30823421 PMCID: PMC6462964 DOI: 10.3390/jcm8030288] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/23/2019] [Accepted: 02/25/2019] [Indexed: 12/20/2022] Open
Abstract
The use of induced Pluripotent Stem Cells (iPSC) as a source of autologous tissues shows great promise in regenerative medicine. Nevertheless, several major challenges remain to be addressed before iPSC-derived cells can be used in therapy, and experience of their clinical use is extremely limited. In this review, the factors affecting the safe translation of iPSC to the clinic are considered, together with an account of efforts being made to overcome these issues. The review draws upon experiences with pluripotent stem-cell therapeutics, including clinical trials involving human embryonic stem cells and the widely transplanted mesenchymal stem cells. The discussion covers concerns relating to: (i) the reprogramming process; (ii) the detection and removal of incompletely differentiated and pluripotent cells from the resulting medicinal products; and (iii) genomic and epigenetic changes, and the evolutionary and selective processes occurring during culture expansion, associated with production of iPSC-therapeutics. In addition, (iv) methods for the practical culture-at-scale and standardization required for routine clinical use are considered. Finally, (v) the potential of iPSC in the treatment of human disease is evaluated in the light of what is known about the reprogramming process, the behavior of cells in culture, and the performance of iPSC in pre-clinical studies.
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Affiliation(s)
- Stephen W Attwood
- Department of Life Sciences, The Natural History Museum, London SW7 5BD, UK.
| | - Michael J Edel
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK.
- Control of Pluripotency Laboratory, Department of Physiological Sciences I, Faculty of Medicine, University of Barcelona, Hospital Clinic, Casanova 143, 08036 Barcelona, Spain.
- Victor Chang Cardiac Research Institute, Sydney, NSW 2145, Australia.
- Harry Perkins Research Institute, Fiona Stanley Hospital, University of Western Australia, PO Box 404, Bull Creek, Western Australia 6149, Australia.
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Fabbrizi MR, Warshowsky KE, Zobel CL, Hallahan DE, Sharma GG. Molecular and epigenetic regulatory mechanisms of normal stem cell radiosensitivity. Cell Death Discov 2018; 4:117. [PMID: 30588339 PMCID: PMC6299079 DOI: 10.1038/s41420-018-0132-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/01/2018] [Accepted: 11/20/2018] [Indexed: 12/14/2022] Open
Abstract
Ionizing radiation (IR) therapy is a major cancer treatment modality and an indispensable auxiliary treatment for primary and metastatic cancers, but invariably results in debilitating organ dysfunctions. IR-induced depletion of neural stem/progenitor cells in the subgranular zone of the dentate gyrus in the hippocampus where neurogenesis occurs is considered largely responsible for deficiencies such as learning, memory, and spatial information processing in patients subjected to cranial irradiation. Similarly, IR therapy-induced intestinal injuries such as diarrhea and malabsorption are common side effects in patients with gastrointestinal tumors and are believed to be caused by intestinal stem cell drop out. Hematopoietic stem cell transplantation is currently used to reinstate blood production in leukemia patients and pre-clinical treatments show promising results in other organs such as the skin and kidney, but ethical issues and logistic problems make this route difficult to follow. An alternative way to restore the injured tissue is to preserve the stem cell pool located in that specific tissue/organ niche, but stem cell response to ionizing radiation is inadequately understood at the molecular mechanistic level. Although embryonic and fetal hypersensity to IR has been very well known for many decades, research on embryonic stem cell models in culture concerning molecular mechanisms have been largely inconclusive and often in contradiction of the in vivo observations. This review will summarize the latest discoveries on stem cell radiosensitivity, highlighting the possible molecular and epigenetic mechanism(s) involved in DNA damage response and programmed cell death after ionizing radiation therapy specific to normal stem cells. Finally, we will analyze the possible contribution of stem cell-specific chromatin's epigenetic constitution in promoting normal stem cell radiosensitivity.
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Affiliation(s)
- Maria Rita Fabbrizi
- Cancer Biology Division, Department of Radiation Oncology, Washington University School of Medicine, 4511 Forest Park, Saint Louis, MO 63108 USA
| | - Kacie E. Warshowsky
- Cancer Biology Division, Department of Radiation Oncology, Washington University School of Medicine, 4511 Forest Park, Saint Louis, MO 63108 USA
| | - Cheri L. Zobel
- Cancer Biology Division, Department of Radiation Oncology, Washington University School of Medicine, 4511 Forest Park, Saint Louis, MO 63108 USA
| | - Dennis E. Hallahan
- Cancer Biology Division, Department of Radiation Oncology, Washington University School of Medicine, 4511 Forest Park, Saint Louis, MO 63108 USA
- Siteman Cancer Center, Washington University School of Medicine, Saint Louis, MO 63108 USA
| | - Girdhar G. Sharma
- Cancer Biology Division, Department of Radiation Oncology, Washington University School of Medicine, 4511 Forest Park, Saint Louis, MO 63108 USA
- Siteman Cancer Center, Washington University School of Medicine, Saint Louis, MO 63108 USA
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9
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Role of cell-secreted extracellular matrix formation in aggregate formation and stability of human induced pluripotent stem cells in suspension culture. J Biosci Bioeng 2018; 127:372-380. [PMID: 30249415 DOI: 10.1016/j.jbiosc.2018.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 08/16/2018] [Accepted: 08/23/2018] [Indexed: 11/22/2022]
Abstract
Clinical and industrial applications require large quantities of human induced pluripotent stem cells (hiPSCs); however, little is known regarding the mechanisms governing aggregate formation and stability in suspension culture. To address this, we determined differences in growth processes among hiPSC lines in suspension culture. Using an hiPSC aggregate suspension culture system, hiPSCs from different lines formed multicellular aggregates classified as large compact or small loose based on their size and morphology. Time-lapse observation of the growth processes of two different hiPSC lines revealed that the balance between cell division and the extent of subsequent cell death determined the final size and morphology of aggregates. Comparison of the cell survival and death of two hiPSC lines showed that the formation of small, loose aggregates was due to continued cell death during the exponential phase of growth, with apoptotic cells extruded from growing hiPSC aggregates by the concerted contraction of their neighbors. Western blot and immunofluorescent staining revealed that aggregate morphology and proliferative ability relied to a considerable extent upon secretion of the extracellular matrix (ECM). hiPSCs forming large compact and stable aggregates showed enhanced production of collagen type I in suspension culture at 120 h. Furthermore, these aggregates exhibited higher expression of E-cadherin and proliferation marker Ki-67 as compared with levels observed in small and loose aggregates at 120 h. These findings indicated that differences in both aggregate formation and stability in suspension culture among hiPSC lines were caused by differences in ECM secretion capacity.
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10
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Schlaeger TM. Nonintegrating Human Somatic Cell Reprogramming Methods. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2018; 163:1-21. [PMID: 29075799 DOI: 10.1007/10_2017_29] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Traditional biomedical research and preclinical studies frequently rely on animal models and repeatedly draw on a relatively small set of human cell lines, such as HeLa, HEK293, HepG2, HL60, and PANC1 cells. However, animal models often fail to reproduce important clinical phenotypes and conventional cell lines only represent a small number of cell types or diseases, have very limited ethnic/genetic diversity, and either senesce quickly or carry potentially confounding immortalizing mutations. In recent years, human pluripotent stem cells have attracted a lot of attention, in part because these cells promise more precise modeling of human diseases. Expectations are also high that pluripotent stem cell technologies can deliver cell-based therapeutics for the cure of a wide range of degenerative and other diseases. This review focuses on episomal and Sendai viral reprogramming modalities, which are the most popular methods for generating transgene-free human induced pluripotent stem cells (hiPSCs) from easily accessible cell sources. Graphical Abstract.
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Affiliation(s)
- Thorsten M Schlaeger
- Stem Cell Program, Boston Children's Hospital, Karp RB09213, 1 Blackfan Circle, Boston, MA, 02446, USA.
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11
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Yuan W, Chen J, Huang H, Cai Z, Ling Q, Huang F, Huang Z. Low-Dose Arsenic Trioxide Modulates the Differentiation of Mouse Embryonic Stem Cells. Chem Res Toxicol 2018; 31:472-481. [PMID: 29767511 DOI: 10.1021/acs.chemrestox.8b00027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Arsenic (As) is a well-known environmental pollutant, while arsenic trioxide (ATO) has been proven to be an effective treatment for acute promyelocytic leukemia, however, the mechanism underlying its dual effects is not fully understood. Embryonic stem cells (ESCs) exhibit properties of stemness and serve as a popular model to investigate epigenetic modifiers including environmental pollutants. Herein, the effects of low-dose ATO on differentiation were evaluated in vitro using a mouse ESCs (mESCs) cell line, CGR8. Cells treated with 0.2-0.5 μM ATO for 3-4 days had slight inhibition of proliferation with elevation of apoptosis, but obvious alterations of differentiation by morphological checking and alkaline phosphatase (AP) staining. Moreover, ATO exposure significantly decreased the mRNA expression of the stemness maintenance genes including Oct4, Nanog, and Rex-1 ( P < 0.01), whereas obviously increased some tissue-specific differentiation marker genes such as Gata4, Gata-6, AFP, and IHH. These alterations were consistent with the differentiation phenotype induced by retinoic acid (RA) and the expression patterns of distinct pluripotency markers such as SSEA-1 and Oct4. Furthermore, low-dose ATO led to a quantitative increase in Caspase 3 (CASP3) activation and subsequent cleavage of Nanog around 27 kDa, which corresponded with the mouse Nanog cleaved by CASP3 in a tube cleavage assay. Taken together, we suggest that low-dose ATO exposure will induce differentiation, other than apoptosis, of ESCs, such effects might be tuned partially by ATO-induced CASP3 activation and Nanog cleavage coupling with other differentiation related genes involved. The present findings provide a preliminary action mechanism of arsenic on the cell fate determination.
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Affiliation(s)
- Wenlin Yuan
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Jun Chen
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Hongren Huang
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Zhihui Cai
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Qinjie Ling
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Feng Huang
- Department of Rehabilitation Medicine, School of Medical Engineering , Foshan University , Foshan 528000 , Guangdong Province , China
| | - Zhi Huang
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
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12
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Xie Y, Bai H, Liu Y, Hoyle DL, Cheng T, Wang ZZ. Cooperative Effect of Erythropoietin and TGF-β Inhibition on Erythroid Development in Human Pluripotent Stem Cells. J Cell Biochem 2016; 116:2735-43. [PMID: 26012423 DOI: 10.1002/jcb.25233] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 05/14/2015] [Indexed: 12/16/2022]
Abstract
Patient-specific human induced-pluripotent stem cells (hiPSCs) represent important cell sources to treat patients with acquired blood disorders. To realize the therapeutic potential of hiPSCs, it is crucial to understand signals that direct hiPSC differentiation to a hematopoietic lineage fate. Our previous study demonstrated that CD34(+)CD31(+) cells derived from human pluripotent stem cells (hPSCs) contain hemato-endothelial progenitors (HEPs) that give rise to hematopoietic cells and endothelial cells. Here, we established a serum-free and feeder-free system to induce the differentiation of hPSC-derived CD34(+)CD31(+) progenitor cells to erythroid cells. We show that extracellular matrix (ECM) proteins promote the differentiation of CD34(+)CD31(+) progenitor cells into CD235a(+) erythroid cells through CD41(+)CD235a(+) megakaryocyte-erythroid progenitors (MEP). Erythropoietin (EPO) is a predominant factor for CD34(+)CD31(+) progenitor differentiation to erythroid cells, whereas transforming growth factor beta (TGF-β) inhibits the development of CD34(+)CD31(+) progenitor cells. Apoptosis of progenitor cells is induced by TGF-β in early erythroid differentiation. Suppression of TGF-β signaling by SB431542 at early stage of CD34(+)CD31(+) progenitor differentiation induces the erythroid cell generation. Together, these findings suggest that TGF-β suppression and EPO stimulation promote erythropoiesis of CD34(+)CD31(+) progenitor cells derived from hPSCs.
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Affiliation(s)
- Yinliang Xie
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Hao Bai
- Division of Hematology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
| | - Yanfeng Liu
- Division of Hematology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
| | - Dixie L Hoyle
- Division of Hematology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Zack Z Wang
- Division of Hematology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
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13
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Lucas CM, Milani M, Butterworth M, Carmell N, Scott LJ, Clark RE, Cohen GM, Varadarajan S. High CIP2A levels correlate with an antiapoptotic phenotype that can be overcome by targeting BCL-XL in chronic myeloid leukemia. Leukemia 2016; 30:1273-81. [PMID: 26987906 PMCID: PMC4895185 DOI: 10.1038/leu.2016.42] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 02/10/2016] [Accepted: 02/12/2016] [Indexed: 12/20/2022]
Abstract
Cancerous inhibitor of protein phosphatase 2A (CIP2A) is a predictive biomarker of disease progression in many malignancies, including imatinib-treated chronic myeloid leukemia (CML). Although high CIP2A levels correlate with disease progression in CML, the underlying molecular mechanisms remain elusive. In a screen of diagnostic chronic phase samples from patients with high and low CIP2A protein levels, high CIP2A levels correlate with an antiapoptotic phenotype, characterized by downregulation of proapoptotic BCL-2 family members, including BIM, PUMA and HRK, and upregulation of the antiapoptotic protein BCL-XL. These results suggest that the poor prognosis of patients with high CIP2A levels is due to an antiapoptotic phenotype. Disrupting this antiapoptotic phenotype by inhibition of BCL-XL via RNA interference or A-1331852, a novel, potent and BCL-XL-selective inhibitor, resulted in extensive apoptosis either alone or in combination with imatinib, dasatinib or nilotinib, both in cell lines and in primary CD34(+) cells from patients with high levels of CIP2A. These results demonstrate that BCL-XL is the major antiapoptotic survival protein and may be a novel therapeutic target in CML.
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Affiliation(s)
- C M Lucas
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - M Milani
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - M Butterworth
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - N Carmell
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - L J Scott
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - R E Clark
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - G M Cohen
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK.,Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - S Varadarajan
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK.,Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
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14
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Chen K, Bai H, Liu Y, Hoyle DL, Shen WF, Wu LQ, Wang ZZ. EphB4 forward-signaling regulates cardiac progenitor development in mouse ES cells. J Cell Biochem 2015; 116:467-75. [PMID: 25359705 PMCID: PMC4452947 DOI: 10.1002/jcb.25000] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 10/20/2014] [Indexed: 11/05/2022]
Abstract
Eph receptor (Eph)‐ephrin signaling plays an important role in organ development and tissue regeneration. Bidirectional signaling of EphB4–ephrinB2 regulates cardiovascular development. To assess the role of EphB4–ephrinB2 signaling in cardiac lineage development, we utilized two GFP reporter systems in embryonic stem (ES) cells, in which the GFP transgenes were expressed in Nkx2.5+ cardiac progenitor cells and in α‐MHC+ cardiomyocytes, respectively. We found that both EphB4 and ephrinB2 were expressed in Nkx2.5‐GFP+ cardiac progenitor cells, but not in α‐MHC‐GFP+ cardiomyocytes during cardiac lineage differentiation of ES cells. An antagonist of EphB4, TNYL‐RAW peptides, that block the binding of EphB4 and ephrinB2, impaired cardiac lineage development in ES cells. Inhibition of EphB4–ephrinB2 signaling at different time points during ES cell differentiation demonstrated that the interaction of EphB4 and ephrinB2 was required for the early stage of cardiac lineage development. Forced expression of human full‐length EphB4 or intracellular domain‐truncated EphB4 in EphB4‐null ES cells was established to investigate the role of EphB4‐forward signaling in ES cells. Interestingly, while full‐length EphB4 was able to restore the cardiac lineage development in EphB4‐null ES cells, the truncated EphB4 that lacks the intracellular domain of tyrosine kinase and PDZ motif failed to rescue the defect of cardiomyocyte development, suggesting that EphB4 intracellular domain is essential for the development of cardiomyocytes. Our study provides evidence that receptor‐kinase‐dependent EphB4‐forward signaling plays a crucial role in the development of cardiac progenitor cells. J. Cell. Biochem. 116: 467–475, 2015. © 2014 The Authors. Journal of Cellular Biochemistry published by Wiley Periodicals, Inc.
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Affiliation(s)
- Kang Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
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15
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Bcl-xL Genetic Modification Enhanced the Therapeutic Efficacy of Mesenchymal Stem Cell Transplantation in the Treatment of Heart Infarction. Stem Cells Int 2015; 2015:176409. [PMID: 26074971 PMCID: PMC4436513 DOI: 10.1155/2015/176409] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/04/2014] [Accepted: 11/11/2014] [Indexed: 01/01/2023] Open
Abstract
Objectives. Low survival rate of mesenchymal stem cells (MSCs) severely limited the therapeutic efficacy of cell therapy in the treatment of myocardial infarction (MI). Bcl-xL genetic modification might enhance MSC survival after transplantation. Methods. Adult rat bone marrow MSCs were modified with human Bcl-xL gene (hBcl-xL-MSCs) or empty vector (vector-MSCs). MSC apoptosis and paracrine secretions were characterized using flow cytometry, TUNEL, and ELISA in vitro. In vivo, randomized adult rats with MI received myocardial injections of one of the three reagents: hBcl-xL-MSCs, vector-MSCs, or culture medium. Histochemistry, TUNEL, and echocardiography were carried out to evaluate cell engraftment, apoptosis, angiogenesis, scar formation, and cardiac functional recovery. Results. In vitro, cell apoptosis decreased 43%, and vascular endothelial growth factor (VEGF), insulin-like growth factor-1 (IGF-1), and plate-derived growth factor (PDGF) increased 1.5-, 0.7-, and 1.2-fold, respectively, in hBcl-xL-MSCs versus wild type and vector-MSCs. In vivo, cell apoptosis decreased 40% and 26% in hBcl-xL-MSC group versus medium and vector-MSC group, respectively. Similar results were observed in cell engraftment, angiogenesis, scar formation, and cardiac functional recovery. Conclusions. Genetic modification of MSCs with hBcl-xL gene could be an intriguing strategy to improve the therapeutic efficacy of cell therapy in the treatment of heart infarction.
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16
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Tosca L, Feraud O, Magniez A, Bas C, Griscelli F, Bennaceur-Griscelli A, Tachdjian G. Genomic instability of human embryonic stem cell lines using different passaging culture methods. Mol Cytogenet 2015; 8:30. [PMID: 26052346 PMCID: PMC4456787 DOI: 10.1186/s13039-015-0133-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/07/2015] [Indexed: 12/22/2022] Open
Abstract
Background Human embryonic stem cells exhibit genomic instability that can be related to culture duration or to the passaging methods used for cell dissociation. In order to study the impact of cell dissociation techniques on human embryonic stem cells genomic instability, we cultured H1 and H9 human embryonic stem cells lines using mechanical/manual or enzymatic/collagenase-IV dissociation methods. Genomic instability was evaluated at early (<p60) and late (>p60) passages by using oligonucleotide based array-comparative genomic hybridization 105 K with a mean resolution of 50 Kb. Results DNA variations were mainly located on subtelomeric and pericentromeric regions with sizes <100 Kb. In this study, 9 recurrent genomic variations were acquired during culture including the well known duplication 20q11.21. When comparing cell dissociation methods, we found no significant differences between DNA variations number and size, DNA gain or DNA loss frequencies, homozygous loss frequencies and no significant difference on the content of genes involved in development, cell cycle tumorigenesis and syndrome disease. In addition, we have never found any malignant tissue in 4 different teratoma representative of the two independent stem cell lines. Conclusions These results show that the occurrence of genomic instability in human embryonic stem cells is similar using mechanical or collagenase IV-based enzymatic cell culture dissociation methods. All the observed genomic variations have no impact on the development of malignancy. Electronic supplementary material The online version of this article (doi:10.1186/s13039-015-0133-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lucie Tosca
- AP-HP, Histologie-Embryologie-Cytogénétique, Hôpitaux Universitaires Paris Sud, Clamart, F-92141 France ; Université Paris Sud, Le Kremlin-Bicêtre, F-94275 France ; Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France
| | - Olivier Feraud
- Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France
| | - Aurélie Magniez
- Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France
| | - Cécile Bas
- AP-HP, Histologie-Embryologie-Cytogénétique, Hôpitaux Universitaires Paris Sud, Clamart, F-92141 France ; Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France
| | - Frank Griscelli
- Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France ; Université Paris Descartes, Sorbonne Paris Cité, F-75006 France
| | - Annelise Bennaceur-Griscelli
- Université Paris Sud, Le Kremlin-Bicêtre, F-94275 France ; Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France ; AP-HP, Hématologie, Hôpitaux Universitaires Paris Sud, Villejuif, F-94801 France
| | - Gérard Tachdjian
- AP-HP, Histologie-Embryologie-Cytogénétique, Hôpitaux Universitaires Paris Sud, Clamart, F-92141 France ; Université Paris Sud, Le Kremlin-Bicêtre, F-94275 France ; Esteam Paris Sud INSERM UMR-S 935, Villejuif, F-94801 France
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17
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Chou BK, Gu H, Gao Y, Dowey SN, Wang Y, Shi J, Li Y, Ye Z, Cheng T, Cheng L. A facile method to establish human induced pluripotent stem cells from adult blood cells under feeder-free and xeno-free culture conditions: a clinically compliant approach. Stem Cells Transl Med 2015; 4:320-32. [PMID: 25742692 DOI: 10.5966/sctm.2014-0214] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Reprogramming human adult blood mononuclear cells (MNCs) cells by transient plasmid expression is becoming increasingly popular as an attractive method for generating induced pluripotent stem (iPS) cells without the genomic alteration caused by genome-inserting vectors. However, its efficiency is relatively low with adult MNCs compared with cord blood MNCs and other fetal cells and is highly variable among different adult individuals. We report highly efficient iPS cell derivation under clinically compliant conditions via three major improvements. First, we revised a combination of three EBNA1/OriP episomal vectors expressing five transgenes, which increased reprogramming efficiency by ≥10-50-fold from our previous vectors. Second, human recombinant vitronectin proteins were used as cell culture substrates, alleviating the need for feeder cells or animal-sourced proteins. Finally, we eliminated the previously critical step of manually picking individual iPS cell clones by pooling newly emerged iPS cell colonies. Pooled cultures were then purified based on the presence of the TRA-1-60 pluripotency surface antigen, resulting in the ability to rapidly expand iPS cells for subsequent applications. These new improvements permit a consistent and reliable method to generate human iPS cells with minimal clonal variations from blood MNCs, including previously difficult samples such as those from patients with paroxysmal nocturnal hemoglobinuria. In addition, this method of efficiently generating iPS cells under feeder-free and xeno-free conditions allows for the establishment of clinically compliant iPS cell lines for future therapeutic applications.
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Affiliation(s)
- Bin-Kuan Chou
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Haihui Gu
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yongxing Gao
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Sarah N Dowey
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Ying Wang
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jun Shi
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yanxin Li
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Zhaohui Ye
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Tao Cheng
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Linzhao Cheng
- Division of Hematology, Department of Medicine, and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, and Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin, People's Republic of China; Department of Transfusion, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Key Laboratory of Pediatric Hematology/Oncology of Ministry of Health, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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18
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Dowell KG, Simons AK, Bai H, Kell B, Wang ZZ, Yun K, Hibbs MA. Novel insights into embryonic stem cell self-renewal revealed through comparative human and mouse systems biology networks. Stem Cells 2014; 32:1161-72. [PMID: 24307629 DOI: 10.1002/stem.1612] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 10/11/2013] [Indexed: 12/25/2022]
Abstract
Embryonic stem cells (ESCs), characterized by their ability to both self-renew and differentiate into multiple cell lineages, are a powerful model for biomedical research and developmental biology. Human and mouse ESCs share many features, yet have distinctive aspects, including fundamental differences in the signaling pathways and cell cycle controls that support self-renewal. Here, we explore the molecular basis of human ESC self-renewal using Bayesian network machine learning to integrate cell-type-specific, high-throughput data for gene function discovery. We integrated high-throughput ESC data from 83 human studies (~1.8 million data points collected under 1,100 conditions) and 62 mouse studies (~2.4 million data points collected under 1,085 conditions) into separate human and mouse predictive networks focused on ESC self-renewal to analyze shared and distinct functional relationships among protein-coding gene orthologs. Computational evaluations show that these networks are highly accurate, literature validation confirms their biological relevance, and reverse transcriptase polymerase chain reaction (RT-PCR) validation supports our predictions. Our results reflect the importance of key regulatory genes known to be strongly associated with self-renewal and pluripotency in both species (e.g., POU5F1, SOX2, and NANOG), identify metabolic differences between species (e.g., threonine metabolism), clarify differences between human and mouse ESC developmental signaling pathways (e.g., leukemia inhibitory factor (LIF)-activated JAK/STAT in mouse; NODAL/ACTIVIN-A-activated fibroblast growth factor in human), and reveal many novel genes and pathways predicted to be functionally associated with self-renewal in each species. These interactive networks are available online at www.StemSight.org for stem cell researchers to develop new hypotheses, discover potential mechanisms involving sparsely annotated genes, and prioritize genes of interest for experimental validation.
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Affiliation(s)
- Karen G Dowell
- The Jackson Laboratory, Bar Harbor, Maine, USA; Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, Maine, USA
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19
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Peterson SE, Loring JF. Genomic instability in pluripotent stem cells: implications for clinical applications. J Biol Chem 2013; 289:4578-84. [PMID: 24362040 DOI: 10.1074/jbc.r113.516419] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Human pluripotent stem cells (hPSCs) are known to acquire genomic changes as they proliferate and differentiate. Despite concerns that these changes will compromise the safety of hPSC-derived cell therapy, there is currently scant evidence linking the known hPSC genomic abnormalities with malignancy. For the successful use of hPSCs for clinical applications, we will need to learn to distinguish between innocuous genomic aberrations and those that may cause tumors. To minimize any effects of acquired mutations on cell therapy, we strongly recommend that cells destined for transplant be monitored throughout their preparation using a high-resolution method such as SNP genotyping.
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Affiliation(s)
- Suzanne E Peterson
- From the Department of Chemical Physiology and Center for Regenerative Medicine, The Scripps Research Institute, La Jolla, California 92037
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20
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Nguyen HT, Geens M, Mertzanidou A, Jacobs K, Heirman C, Breckpot K, Spits C. Gain of 20q11.21 in human embryonic stem cells improves cell survival by increased expression of Bcl-xL. Mol Hum Reprod 2013; 20:168-77. [PMID: 24217388 DOI: 10.1093/molehr/gat077] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Gain of 20q11.21 is a chromosomal abnormality that is recurrently found in human pluripotent stem cells and cancers, strongly suggesting that this mutation confers a proliferative or survival advantage to these cells. In this work we studied three human embryonic stem cell (hESC) lines that acquired a gain of 20q11.21 during in vitro culture. The study of the mRNA gene expression levels of the loci located in the common region of duplication showed that HM13, ID1, BCL2L1, KIF3B and the immature form of the micro-RNA miR-1825 were up-regulated in mutant cells. ID1 and BCL2L1 were further studied as potential drivers of the phenotype of hESC with a 20q11.21 gain. We found no increase in the protein levels of ID1, nor the downstream effects expected from over-expression of this gene. On the other hand, hESC with a gain of 20q11.21 had on average a 3-fold increase of Bcl-xL (the anti-apoptotic isoform of BCL2L1) protein levels. The mutant hESC underwent 2- to 3-fold less apoptosis upon loss of cell-to-cell contact and were ∼2-fold more efficient in forming colonies from a single cell. The key role of BCL2L1 in this mutation was further confirmed by transgenic over-expression of BCL2L1 in the wild-type cells, leading to apoptosis-resistant cells, and BCL2L1-knock-down in the mutant hESC, resulting in a restoration of the wild-type phenotype. This resistance to apoptosis supposes a significant advantage for the mutant cells, explaining the high frequency of gains of 20q11.21 in human pluripotent stem cells.
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Affiliation(s)
- H T Nguyen
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Brussels, Belgium
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21
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Abbasalizadeh S, Baharvand H. Technological progress and challenges towards cGMP manufacturing of human pluripotent stem cells based therapeutic products for allogeneic and autologous cell therapies. Biotechnol Adv 2013; 31:1600-23. [PMID: 23962714 DOI: 10.1016/j.biotechadv.2013.08.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 06/20/2013] [Accepted: 08/12/2013] [Indexed: 12/16/2022]
Abstract
Recent technological advances in the generation, characterization, and bioprocessing of human pluripotent stem cells (hPSCs) have created new hope for their use as a source for production of cell-based therapeutic products. To date, a few clinical trials that have used therapeutic cells derived from hESCs have been approved by the Food and Drug Administration (FDA), but numerous new hPSC-based cell therapy products are under various stages of development in cell therapy-specialized companies and their future market is estimated to be very promising. However, the multitude of critical challenges regarding different aspects of hPSC-based therapeutic product manufacturing and their therapies have made progress for the introduction of new products and clinical applications very slow. These challenges include scientific, technological, clinical, policy, and financial aspects. The technological aspects of manufacturing hPSC-based therapeutic products for allogeneic and autologous cell therapies according to good manufacturing practice (cGMP) quality requirements is one of the most important challenging and emerging topics in the development of new hPSCs for clinical use. In this review, we describe main critical challenges and highlight a series of technological advances in all aspects of hPSC-based therapeutic product manufacturing including clinical grade cell line development, large-scale banking, upstream processing, downstream processing, and quality assessment of final cell therapeutic products that have brought hPSCs closer to clinical application and commercial cGMP manufacturing.
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Affiliation(s)
- Saeed Abbasalizadeh
- Department of Stem Cells and Developmental Biology at Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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Vinarsky V, Krivanek J, Rankel L, Nahacka Z, Barta T, Jaros J, Andera L, Hampl A. Human embryonic and induced pluripotent stem cells express TRAIL receptors and can be sensitized to TRAIL-induced apoptosis. Stem Cells Dev 2013; 22:2964-74. [PMID: 23806100 DOI: 10.1089/scd.2013.0057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Death ligands and their tumor necrosis factor receptor (TNFR) family receptors are the best-characterized and most efficient inducers of apoptotic signaling in somatic cells. In this study, we analyzed whether these prototypic activators of apoptosis are also expressed and able to be activated in human pluripotent stem cells. We examined human embryonic stem cells (hESC) and human-induced pluripotent stem cells (hiPSC) and found that both cell types express primarily TNF-related apoptosis-inducing ligand (TRAIL) receptors and TNFR1, but very low levels of Fas/CD95. We also found that although hESC and hiPSC contain all the proteins required for efficient induction and progression of extrinsic apoptotic signaling, they are resistant to TRAIL-induced apoptosis. However, both hESC and hiPSC can be sensitized to TRAIL-induced apoptosis by co-treatment with protein synthesis inhibitors such as the anti-leukemia drug homoharringtonine (HHT). HHT treatment led to suppression of cellular FLICE inhibitory protein (cFLIP) and Mcl-1 expression and, in combination with TRAIL, enhanced processing of caspase-8 and full activation of caspase-3. cFLIP likely represents an important regulatory node, as its shRNA-mediated down-regulation significantly sensitized hESC to TRAIL-induced apoptosis. Thus, we provide the first evidence that, irrespective of their origin, human pluripotent stem cells express canonical components of the extrinsic apoptotic system and on stress can activate death receptor-mediated apoptosis.
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Affiliation(s)
- Vladimir Vinarsky
- 1 Department of Histology and Embryology, Faculty of Medicine, Masaryk University , Brno, Czech Republic
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23
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Lessons learned about human stem cell responses to ionizing radiation exposures: a long road still ahead of us. Int J Mol Sci 2013; 14:15695-723. [PMID: 23899786 PMCID: PMC3759881 DOI: 10.3390/ijms140815695] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/15/2013] [Accepted: 07/17/2013] [Indexed: 12/16/2022] Open
Abstract
Human stem cells (hSC) possess several distinct characteristics that set them apart from other cell types. First, hSC are self-renewing, capable of undergoing both asymmetric and symmetric cell divisions. Second, these cells can be coaxed to differentiate into various specialized cell types and, as such, hold great promise for regenerative medicine. Recent progresses in hSC biology fostered the characterization of the responses of hSC to genotoxic stresses, including ionizing radiation (IR). Here, we examine how different types of hSC respond to IR, with a special emphasis on their radiosensitivity, cell cycle, signaling networks, DNA damage response (DDR) and DNA repair. We show that human embryonic stem cells (hESCs) possess unique characteristics in how they react to IR that clearly distinguish these cells from all adult hSC studied thus far. On the other hand, a manifestation of radiation injuries/toxicity in human bodies may depend to a large extent on hSC populating corresponding tissues, such as human mesenchymal stem cells (hMSC), human hematopoietic stem cells (hHSC), neural hSC, intestine hSC, etc. We discuss here that hSC responses to IR differ notably across many types of hSC which may represent the distinct roles these cells play in development, regeneration and/or maintenance of homeostasis.
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24
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Bai H, Xie YL, Gao YX, Cheng T, Wang ZZ. The balance of positive and negative effects of TGF-β signaling regulates the development of hematopoietic and endothelial progenitors in human pluripotent stem cells. Stem Cells Dev 2013; 22:2765-76. [PMID: 23758278 DOI: 10.1089/scd.2013.0008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Derived from mesoderm precursors, hemangioblasts are bipotential common progenitors of hematopoietic cells and endothelial cells. The regulatory events controlling hematopoietic and endothelial lineage specification are largely unknown, especially in humans. In this study, we establish a serum-free and feeder-free system with a high-efficient embryoid body (EB) generation to investigate the signals that direct differentiation of human pluripotent stem cells (hPSCs), including human embryonic stem cells (hESCs) and induced pluripotent stem cells (hiPSCs). Consistent with previous studies, the CD34(+)CD31(+)VE-cadherin(+) (VEC(+)) cells derived from hPSCs contain hematopoietic and endothelial progenitors. In the presence of hematopoietic and endothelial growth factors, some of CD34(+)CD31(+)VEC(+) cells give rise to blast colony-forming cells (BL-CFCs), which have been used to characterize bipotential hemangioblasts. We found that the level of the transforming growth factor beta (TGF-β) 1 protein is increased during hPSC differentiation, and that TGF-β signaling has the double-edged effect on hematopoietic and endothelial lineage differentiation in hPSCs. An addition of TGF-β to hPSC differentiation before mesoderm induction promotes the development of mesoderm and the generation of CD34(+)CD31(+)VEC(+) cells. An addition of TGF-β inhibitor, SB431542, before mesoderm induction downregulates the expression of mesodermal markers and reduces the number of CD34(+)CD31(+)VEC(+) progenitor cells. However, inhibition of TGF-β signaling after mesoderm induction increases CD34(+)CD31(+)VEC(+) progenitors and BL-CFCs. These data provide evidence that a balance of positive and negative effects of TGF-β signaling at the appropriate timing is critical, and potential means to improve hematopoiesis and vasculogenesis from hPSCs.
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Affiliation(s)
- Hao Bai
- 1 Division of Hematology, Johns Hopkins University School of Medicine , Baltimore, Maryland
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25
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Villa-Diaz LG, Ross AM, Lahann J, Krebsbach PH. Concise review: The evolution of human pluripotent stem cell culture: from feeder cells to synthetic coatings. Stem Cells 2013; 31:1-7. [PMID: 23081828 DOI: 10.1002/stem.1260] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 10/06/2012] [Indexed: 01/02/2023]
Abstract
Current practices to maintain human pluripotent stem cells (hPSCs), which include induced pluripotent stem cells and embryonic stem cells, in an undifferentiated state typically depend on the support of feeder cells such as mouse embryonic fibroblasts (MEFs) or an extracellular matrix such as Matrigel. Culture conditions that depend on these undefined support systems limit our ability to interpret mechanistic studies aimed at resolving how hPSCs interact with their extracellular environment to remain in a unique undifferentiated state and to make fate-changing lineage decisions. Likewise, the xenogeneic components of MEFs and Matrigel ultimately hinder our ability to use pluripotent stem cells to treat debilitating human diseases. Many of these obstacles have been overcome by the development of synthetic coatings and bioreactors that support hPSC expansion and self-renewal within defined culture conditions that are free from xenogeneic contamination. The establishment of defined culture conditions and synthetic matrices will facilitate studies to more precisely probe the molecular basis of pluripotent stem cell self-renewal and differentiation. When combined with three-dimensional cultures in bioreactors, these systems will also enable large-scale expansion for future clinical applications.
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Affiliation(s)
- L G Villa-Diaz
- Department of Biologic & Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109-1078, USA
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26
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Su RJ, Baylink DJ, Neises A, Kiroyan JB, Meng X, Payne KJ, Tschudy-Seney B, Duan Y, Appleby N, Kearns-Jonker M, Gridley DS, Wang J, Lau KHW, Zhang XB. Efficient generation of integration-free ips cells from human adult peripheral blood using BCL-XL together with Yamanaka factors. PLoS One 2013; 8:e64496. [PMID: 23704989 PMCID: PMC3660366 DOI: 10.1371/journal.pone.0064496] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 04/16/2013] [Indexed: 01/16/2023] Open
Abstract
The ability to efficiently generate integration-free induced pluripotent stem cells (iPSCs) from the most readily available source-peripheral blood-has the potential to expedite the advances of iPSC-based therapies. We have successfully generated integration-free iPSCs from cord blood (CB) CD34(+) cells with improved oriP/EBNA1-based episomal vectors (EV) using a strong spleen focus forming virus (SFFV) long terminal repeat (LTR) promoter. Here we show that Yamanaka factors (OCT4, SOX2, MYC, and KLF4)-expressing EV can also reprogram adult peripheral blood mononuclear cells (PBMNCs) into pluripotency, yet at a very low efficiency. We found that inclusion of BCL-XL increases the reprogramming efficiency by approximately 10-fold. Furthermore, culture of CD3(-)/CD19(-) cells or T/B cell-depleted MNCs for 4-6 days led to the generation of 20-30 iPSC colonies from 1 ml PB, an efficiency that is substantially higher than previously reported. PB iPSCs express pluripotency markers, form teratomas, and can be induced to differentiate in vitro into mesenchymal stem cells, cardiomyocytes, and hepatocytes. Used together, our optimized factor combination and reprogramming strategy lead to efficient generation of integration-free iPSCs from adult PB. This discovery has potential applications in iPSC banking, disease modeling and regenerative medicine.
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Affiliation(s)
- Rui-Jun Su
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
- Division of Anatomy, Loma Linda University, Loma Linda, California, United States of America
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - David J. Baylink
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Amanda Neises
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Jason B. Kiroyan
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Xianmei Meng
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Kimberly J. Payne
- Division of Anatomy, Loma Linda University, Loma Linda, California, United States of America
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Benjamin Tschudy-Seney
- Department of Internal Medicine, Institute for Regenerative Cures, University of California Davis Medical Center, Sacramento, California, United States of America
| | - Yuyou Duan
- Department of Internal Medicine, Institute for Regenerative Cures, University of California Davis Medical Center, Sacramento, California, United States of America
| | - Nancy Appleby
- Division of Anatomy, Loma Linda University, Loma Linda, California, United States of America
| | - Mary Kearns-Jonker
- Division of Anatomy, Loma Linda University, Loma Linda, California, United States of America
| | - Daila S. Gridley
- Department of Radiation Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Jun Wang
- Department of Pathology, Loma Linda University, Loma Linda, California, United States of America
| | - K-H. William Lau
- Jerry L. Pettis Memorial VA Medical Center, Loma Linda, California, United States of America
| | - Xiao-Bing Zhang
- Department of Medicine, Loma Linda University, Loma Linda, California, United States of America
- * E-mail: .
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27
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Kunova M, Matulka K, Eiselleova L, Salykin A, Kubikova I, Kyrylenko S, Hampl A, Dvorak P. Adaptation to robust monolayer expansion produces human pluripotent stem cells with improved viability. Stem Cells Transl Med 2013; 2:246-54. [PMID: 23486835 DOI: 10.5966/sctm.2012-0081] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The generation of human pluripotent stem cells (hPSCs) of sufficient quantity and quality remains a major challenge for biomedical application. Here we present an efficient feeder-free, high-density monolayer system in which hPSCs become SSEA-3-high and gradually more viable than their feeder-dependent counterparts without changes attributed to culture adaptation. As a consequence, monolayer hPSCs possess advantages over their counterparts in embryoid body development, teratoma formation, freezing as a single-cell suspension, and colony-forming efficiency. Importantly, this monolayer culture system is reversible, preserving the competence of hPSCs to gradually reacquire features of colony growth, if necessary. Therefore, the monolayer culture system is highly suitable for long-term, large-scale propagation of hPSCs, which is necessary in drug development and pluripotent stem cell-based therapies.
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Affiliation(s)
- Michaela Kunova
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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28
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Sherman SP, Pyle AD. Small molecule screening with laser cytometry can be used to identify pro-survival molecules in human embryonic stem cells. PLoS One 2013; 8:e54948. [PMID: 23383009 PMCID: PMC3558484 DOI: 10.1371/journal.pone.0054948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/19/2012] [Indexed: 02/08/2023] Open
Abstract
Differentiated cells from human embryonic stem cells (hESCs) provide an unlimited source of cells for use in regenerative medicine. The recent derivation of human induced pluripotent cells (hiPSCs) provides a potential supply of pluripotent cells that avoid immune rejection and could provide patient-tailored therapy. In addition, the use of pluripotent cells for drug screening could enable routine toxicity testing and evaluation of underlying disease mechanisms. However, prior to establishment of patient specific cells for cell therapy it is important to understand the basic regulation of cell fate decisions in hESCs. One critical issue that hinders the use of these cells is the fact that hESCs survive poorly upon dissociation, which limits genetic manipulation because of poor cloning efficiency of individual hESCs, and hampers production of large-scale culture of hESCs. To address the problems associated with poor growth in culture and our lack of understanding of what regulates hESC signaling, we successfully developed a screening platform that allows for large scale screening for small molecules that regulate survival. In this work we developed the first large scale platform for hESC screening using laser scanning cytometry and were able to validate this platform by identifying the pro-survival molecule HA-1077. These small molecules provide targets for both improving our basic understanding of hESC survival as well as a tool to improve our ability to expand and genetically manipulate hESCs for use in regenerative applications.
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Affiliation(s)
- Sean P. Sherman
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America
| | - April D. Pyle
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Microbiology, Immunology, and Molecular Genetics, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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29
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Youlin K, Li Z, Xin G, Mingchao X, Xiuheng L, Xiaodong W. Enhanced function of cytotoxic T lymphocytes induced by dendritic cells modified with truncated PSMA and 4-1BBL. Hum Vaccin Immunother 2013; 9:766-72. [PMID: 23295983 DOI: 10.4161/hv.23116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Interactions between costimulatory molecules and their receptors are vital for Ag-presenting dendritic cells (DCs) to initiate T cells activation, expansion and their antitumor immune responses. Augmentation of costimulatory signal due to the interaction of DCs and T cells may amplify, sustain and drive diversity of cytotoxic T lymphocytes (CTLs) and consequently enhance the antitumor response. 4-1BBL/4-1BB is such a pair of costimulatory ligand and receptor, playing an important role in the co-stimulation of CTLs. Previously, we demonstrated that DCs transduced with recombinant adenovirus encoding truncated PSMA (tPSMA) and m4-1BBL could induce prostate cancer regression in mouse models. In the present study, we further explored the adjuvant role of 4-1BBL in modulating CTLs activation induced by tPSMA gene-pulsed DCs. The apoptosis and cytotoxicity against tPSMA expressing RM-1 cells of CTLs were determined. Results showed that tPSMA gene-pulsed DCs effectively induced T lymphocyte activation and cytotoxicity, which was enhanced by upregulated expression of 4-1BBL, displaying better cell viability, lower CTLs apoptosis, higher expression anti-apoptotic protein of Bcl-xL and phosphorylation of P38, enhanced NF-κB activation, as well as more IFN-γ production. These results demonstrated that 4-1BBL may play a significant role in the co-stimulation pathway for Ag-presenting DCs-mediated CTLs activity, which might be a beneficial adjuvant factor for DCs-based cancer immunotherapy.
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Affiliation(s)
- Kuang Youlin
- Department of Urology; The First Affiliated Hospital; Chongqing Medical University; Chongqing, P.R. China
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30
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Sart S, Ma T, Li Y. Cryopreservation of pluripotent stem cell aggregates in defined protein-free formulation. Biotechnol Prog 2012; 29:143-53. [PMID: 23125166 DOI: 10.1002/btpr.1653] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 09/25/2012] [Indexed: 12/14/2022]
Abstract
Cultivation of undifferentiated pluripotent stem cells (PSCs) as aggregates has emerged as an efficient culture configuration, enabling rapid and controlled large scale expansion. Aggregate-based PSC cryopreservation facilitates the integrated process of cell expansion and cryopreservation, but its feasibility has not been demonstrated. The goals of current study are to assess the suitability of cryopreserving intact mouse embryonic stem cell (mESC) aggregates and investigate the effects of aggregate size and the formulation of cryopreservation solution on mESC survival and recovery. The results demonstrated the size-dependent cell survival and recovery of intact aggregates. In particular, the generation of reactive oxygen species (ROS) and caspase activation were reduced for small aggregates (109 ± 55 μm) compared to medium (245 ± 77 μm) and large (365 ± 141 μm) ones, leading to the improved cell recovery. In addition, a defined protein-free formulation was tested and found to promote the aggregate survival, eliminating the cell exposure to animal serum. The cryopreserved aggregates also maintained the pluripotent markers and the differentiation capacity into three-germ layers after thawing. In summary, the cryopreservation of small PSC aggregates in a defined protein-free formulation was shown to be a suitable approach toward a fully integrated expansion and cryopreservation process at large scale.
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Affiliation(s)
- Sébastien Sart
- Dept. of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, USA
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31
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Li L, Bennett SAL, Wang L. Role of E-cadherin and other cell adhesion molecules in survival and differentiation of human pluripotent stem cells. Cell Adh Migr 2012; 6:59-70. [PMID: 22647941 PMCID: PMC3364139 DOI: 10.4161/cam.19583] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The survival, proliferation, self-renewal and differentiation of human pluripotent stem cells (hPSCs, including human embryonic stem cells and human induced pluripotent stem cells) involve a number of processes that require cell-cell and cell-matrix interactions. The cell adhesion molecules (CAMs), a group of cell surface proteins play a pivotal role in mediating such interactions. Recent studies have provided insights into the essential roles and mechanisms of CAMs in the regulation of hPSC fate decisions. Here, we review the latest research progress in this field and focus on how E-cadherin and several other important CAMs including classic cadherins, Ig-superfamily CAMs, integrins and heparin sulfate proteoglycans control survival and differentiation of hPSCs.
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Affiliation(s)
- Li Li
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON Canada
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32
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Human embryonic stem cells have constitutively active Bax at the Golgi and are primed to undergo rapid apoptosis. Mol Cell 2012; 46:573-83. [PMID: 22560721 DOI: 10.1016/j.molcel.2012.04.002] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 12/05/2011] [Accepted: 04/02/2012] [Indexed: 12/21/2022]
Abstract
Human embryonic stem (hES) cells activate a rapid apoptotic response after DNA damage but the underlying mechanisms are unknown. A critical mediator of apoptosis is Bax, which is reported to become active and translocate to the mitochondria only after apoptotic stimuli. Here we show that undifferentiated hES cells constitutively maintain Bax in its active conformation. Surprisingly, active Bax was maintained at the Golgi rather than at the mitochondria, thus allowing hES cells to effectively minimize the risks associated with having preactivated Bax. After DNA damage, active Bax rapidly translocated to the mitochondria by a p53-dependent mechanism. Interestingly, upon differentiation, Bax was no longer active, and cells were not acutely sensitive to DNA damage. Thus, maintenance of Bax in its active form is a unique mechanism that can prime hES cells for rapid death, likely to prevent the propagation of mutations during the early critical stages of embryonic development.
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33
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Serra M, Brito C, Correia C, Alves PM. Process engineering of human pluripotent stem cells for clinical application. Trends Biotechnol 2012; 30:350-9. [PMID: 22541338 DOI: 10.1016/j.tibtech.2012.03.003] [Citation(s) in RCA: 214] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 03/14/2012] [Accepted: 03/14/2012] [Indexed: 12/16/2022]
Abstract
Human pluripotent stem cells (hPSCs), including embryonic and induced pluripotent stem cells, constitute an extremely attractive tool for cell therapy. However, flexible platforms for the large-scale production and storage of hPSCs in tightly controlled conditions are necessary to deliver high-quality cells in relevant quantities to satisfy clinical demands. Here we discuss the main principles for the bioprocessing of hPSCs, highlighting the impact of environmental factors, novel 3D culturing approaches and integrated bioreactor strategies for controlling hPSC culture outcome. Knowledge on hPSC bioprocessing accumulated during recent years provides important insights for the establishment of more robust production platforms and should potentiate the implementation of novel hPSC-based therapies.
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Affiliation(s)
- Margarida Serra
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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34
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Xu M, Millard RW, Ashraf M. Role of GATA-4 in differentiation and survival of bone marrow mesenchymal stem cells. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2012; 111:217-41. [PMID: 22917233 DOI: 10.1016/b978-0-12-398459-3.00010-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cell and tissue regeneration is a relatively new research field and it incorporates a novel application of molecular genetics. Combinatorial approaches for stem-cell-based therapies wherein guided differentiation into cardiac lineage cells and cells secreting paracrine factors may be necessary to overcome the limitations and shortcomings of a singular approach. GATA-4, a GATA zinc-finger transcription factor family member, has been shown to regulate differentiation, growth, and survival of a wide range of cell types. In this chapter, we discuss whether overexpression of GATA-4 increases mesenchymal stem cell (MSC) transdifferentiation into cardiac phenotype and enhances the MSC secretome, thereby increasing cell survival and promoting postinfarction cardiac angiogenesis. MSCs engineered with GATA-4 enhance their capacity to differentiate into cardiac cell phenotypes, improve survival of the cardiac progenitor cells and their offspring, and modulate the paracrine activity of stem cells to support their angiomyogenic potential and cardioprotective effects.
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Affiliation(s)
- Meifeng Xu
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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35
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Suvorova II, Katolikova NV, Pospelov VA. New insights into cell cycle regulation and DNA damage response in embryonic stem cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2012; 299:161-98. [PMID: 22959303 DOI: 10.1016/b978-0-12-394310-1.00004-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Embryonic stem cells (ESCs) have unlimited proliferative potential, while retaining the ability to differentiate into descendants of all three embryonic layers. High proliferation rate of ESCs is accompanied by a shortening of the G(1) phase and the lack of G(1) checkpoint following DNA damage. The absence of G(1) arrest in ESCs after DNA damage is likely caused by a dysfunction of the p53-dependent p21Waf1 pathway that is a key event for the maintenance of pluripotency. There are controversial data on the functional status of p53, but it is well established that one of the key p53 target-p21Waf1-is expressed in ESCs at a very low level. Despite the lack of G(1) checkpoint, ESCs are capable to repair DNA defects; moreover the DNA damage response (DDR) signaling operates very effectively throughout the cell cycle. This review covers also the results obtained with the reprogramming of somatic cells into the induced pluripotent stem cells, for which have been shown that a partial dysfunction of the p53Waf1 pathway increases the frequency of generation of pluripotent cells. In summary, these results indicate that the G(1) checkpoint control and DDR are distinct from somatic cells and their status is tightly connected with maintaining of pluripotency and self-renewal.
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Affiliation(s)
- Irina I Suvorova
- Institute of Cytology, Russian Academy of Sciences, St Petersburg, Russia
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36
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Amps K, Andrews PW, Anyfantis G, Armstrong L, Avery S, Baharvand H, Baker J, Baker D, Munoz MB, Beil S, Benvenisty N, Ben-Yosef D, Biancotti JC, Bosman A, Brena RM, Brison D, Caisander G, Camarasa MV, Chen J, Chiao E, Choi YM, Choo ABH, Collins D, Colman A, Crook JM, Daley GQ, Dalton A, De Sousa PA, Denning C, Downie J, Dvorak P, Montgomery KD, Feki A, Ford A, Fox V, Fraga AM, Frumkin T, Ge L, Gokhale PJ, Golan-Lev T, Gourabi H, Gropp M, Lu G, Hampl A, Harron K, Healy L, Herath W, Holm F, Hovatta O, Hyllner J, Inamdar MS, Irwanto AK, Ishii T, Jaconi M, Jin Y, Kimber S, Kiselev S, Knowles BB, Kopper O, Kukharenko V, Kuliev A, Lagarkova MA, Laird PW, Lako M, Laslett AL, Lavon N, Lee DR, Lee JE, Li C, Lim LS, Ludwig TE, Ma Y, Maltby E, Mateizel I, Mayshar Y, Mileikovsky M, Minger SL, Miyazaki T, Moon SY, Moore H, Mummery C, Nagy A, Nakatsuji N, Narwani K, Oh SKW, Oh SK, Olson C, Otonkoski T, Pan F, Park IH, Pells S, Pera MF, Pereira LV, Qi O, Raj GS, Reubinoff B, Robins A, Robson P, Rossant J, Salekdeh GH, Schulz TC, Sermon K, Sheik Mohamed J, Shen H, Sherrer E, Sidhu K, Sivarajah S, Skottman H, Spits C, Stacey GN, Strehl R, Strelchenko N, Suemori H, Sun B, Suuronen R, Takahashi K, Tuuri T, Venu P, Verlinsky Y, Ward-van Oostwaard D, Weisenberger DJ, Wu Y, Yamanaka S, Young L, Zhou Q. Screening ethnically diverse human embryonic stem cells identifies a chromosome 20 minimal amplicon conferring growth advantage. Nat Biotechnol 2011; 29:1132-44. [PMID: 22119741 PMCID: PMC3454460 DOI: 10.1038/nbt.2051] [Citation(s) in RCA: 417] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 10/26/2011] [Indexed: 02/07/2023]
Abstract
The International Stem Cell Initiative analyzed 125 human embryonic stem (ES) cell lines and 11 induced pluripotent stem (iPS) cell lines, from 38 laboratories worldwide, for genetic changes occurring during culture. Most lines were analyzed at an early and late passage. Single-nucleotide polymorphism (SNP) analysis revealed that they included representatives of most major ethnic groups. Most lines remained karyotypically normal, but there was a progressive tendency to acquire changes on prolonged culture, commonly affecting chromosomes 1, 12, 17 and 20. DNA methylation patterns changed haphazardly with no link to time in culture. Structural variants, determined from the SNP arrays, also appeared sporadically. No common variants related to culture were observed on chromosomes 1, 12 and 17, but a minimal amplicon in chromosome 20q11.21, including three genes expressed in human ES cells, ID1, BCL2L1 and HM13, occurred in >20% of the lines. Of these genes, BCL2L1 is a strong candidate for driving culture adaptation of ES cells.
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Affiliation(s)
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- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield, UK
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