1
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Shang T, Jiang T, Cui X, Pan Y, Feng X, Dong L, Wang H. Diverse functions of SOX9 in liver development and homeostasis and hepatobiliary diseases. Genes Dis 2024; 11:100996. [PMID: 38523677 PMCID: PMC10958229 DOI: 10.1016/j.gendis.2023.03.035] [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: 07/26/2022] [Revised: 02/13/2023] [Accepted: 03/19/2023] [Indexed: 03/26/2024] Open
Abstract
The liver is the central organ for digestion and detoxification and has unique metabolic and regenerative capacities. The hepatobiliary system originates from the foregut endoderm, in which cells undergo multiple events of cell proliferation, migration, and differentiation to form the liver parenchyma and ductal system under the hierarchical regulation of transcription factors. Studies on liver development and diseases have revealed that SRY-related high-mobility group box 9 (SOX9) plays an important role in liver embryogenesis and the progression of hepatobiliary diseases. SOX9 is not only a master regulator of cell fate determination and tissue morphogenesis, but also regulates various biological features of cancer, including cancer stemness, invasion, and drug resistance, making SOX9 a potential biomarker for tumor prognosis and progression. This review systematically summarizes the latest findings of SOX9 in hepatobiliary development, homeostasis, and disease. We also highlight the value of SOX9 as a novel biomarker and potential target for the clinical treatment of major liver diseases.
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Affiliation(s)
- Taiyu Shang
- School of Life Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200438, China
| | - Tianyi Jiang
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Xiaowen Cui
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
| | - Yufei Pan
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
| | - Xiaofan Feng
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Liwei Dong
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Hongyang Wang
- School of Life Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200438, China
- National Center for Liver Cancer, The Naval Medical University, Shanghai 201805, China
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
- Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer, Second Military Medical University & Ministry of Education, Shanghai 200438, China
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2
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Liu X, Huang Z, Chen Q, Chen K, Liu W, Liu G, Chu X, Li D, Ma Y, Tian X, Yang Y. Hypoxia-induced epigenetic regulation of miR-485-3p promotes stemness and chemoresistance in pancreatic ductal adenocarcinoma via SLC7A11-mediated ferroptosis. Cell Death Discov 2024; 10:262. [PMID: 38811540 PMCID: PMC11137092 DOI: 10.1038/s41420-024-02035-x] [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: 01/14/2024] [Revised: 05/18/2024] [Accepted: 05/21/2024] [Indexed: 05/31/2024] Open
Abstract
The mechanism of hypoxia in chemoresistance of pancreatic ductal adenocarcinoma (PDAC) remains elusive. In this study, we revealed the essential role of miR-485-3p in PDAC, particularly its impact on cancer stemness and gemcitabine resistance under hypoxic conditions. We found substantial downregulation of miR-485-3p in PDAC tissues, with lower expression correlating to poor patient outcomes. Mechanistically, miR-485-3p influenced stemness characteristics, as evidenced by reduced tumor-sphere formation and increased sensitivity to gemcitabine upon overexpression. Moreover, we identified SOX9 and SLC7A11 as two targets of miR-485-3p, which play a vital role in stemness and ferroptosis. Under the hypoxic condition, DNMT3B expression was upregulated, leading to hypermethylation of the miR-485-3p promoter region. The reduced miR-485-3p expression promoted stemness and chemoresistance of PDAC. In conclusion, our findings elucidate the intricate interplay of hypoxia, epigenetic modifications, and ferroptosis in PDAC and shed light on potential avenues for targeted interventions that modulate cancer stemness and chemosensitivity, offering prospects for improved therapeutic strategies for PDAC.
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Affiliation(s)
- Xinxin Liu
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Zhihua Huang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University, Beijing, 100191, China
| | - Qiuzheng Chen
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Kai Chen
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Weikang Liu
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Guangnian Liu
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Xiangyu Chu
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Dongqi Li
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Yongsu Ma
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Xiaodong Tian
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China.
| | - Yinmo Yang
- Department of General Surgery, Peking University First Hospital, Beijing, 100034, China.
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3
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Narayan G, Ronima K R, Agrawal A, Thummer RP. An Insight into Vital Genes Responsible for β-cell Formation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1450:1-27. [PMID: 37432546 DOI: 10.1007/5584_2023_778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
The regulation of glucose homeostasis and insulin secretion by pancreatic β-cells, when disturbed, will result in diabetes mellitus. Replacement of dysfunctional or lost β-cells with fully functional ones can tackle the problem of β-cell generation in diabetes mellitus. Various pancreatic-specific genes are expressed during different stages of development, which have essential roles in pancreatogenesis and β-cell formation. These factors play a critical role in cellular-based studies like transdifferentiation or de-differentiation of somatic cells to multipotent or pluripotent stem cells and their differentiation into functional β-cells. This work gives an overview of crucial transcription factors expressed during various stages of pancreas development and their role in β-cell specification. In addition, it also provides a perspective on the underlying molecular mechanisms.
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Affiliation(s)
- Gloria Narayan
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Ronima K R
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Akriti Agrawal
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Rajkumar P Thummer
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India.
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4
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Wang J, Wan X, Le Q. Cross-regulation between SOX9 and the canonical Wnt signalling pathway in stem cells. Front Mol Biosci 2023; 10:1250530. [PMID: 37664185 PMCID: PMC10469848 DOI: 10.3389/fmolb.2023.1250530] [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: 06/30/2023] [Accepted: 08/09/2023] [Indexed: 09/05/2023] Open
Abstract
SOX9, a member of the SRY-related HMG-box transcription factors, has been reported to critically regulate fetal development and stem cell homeostasis. Wnt signalling is a highly conserved signalling pathway that controls stem cell fate decision and stemness maintenance throughout embryonic development and adult life. Many studies have shown that the interactions between SOX9 and the canonical Wnt signalling pathway are involved in many of the physiological and pathological processes of stem cells, including organ development, the proliferation, differentiation and stemness maintenance of stem cells, and tumorigenesis. In this review, we summarize the already-known molecular mechanism of cross-interactions between SOX9 and the canonical Wnt signalling pathway, outline its regulatory effects on the maintenance of homeostasis in different types of stem cells, and explore its potential in translational stem cell therapy.
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Affiliation(s)
- Jiajia Wang
- Department of Ophthalmology, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai, China
| | - Xichen Wan
- Department of Ophthalmology, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai, China
| | - Qihua Le
- Department of Ophthalmology, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai, China
- Research Center, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai, China
- Myopia Key Laboratory of Ministry of Health, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai, China
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5
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Harithpriya K, Jayasuriya R, Adhikari T, Rai A, Ramkumar KM. Modulation of transcription factors by small molecules in β-cell development and differentiation. Eur J Pharmacol 2023; 946:175606. [PMID: 36809813 DOI: 10.1016/j.ejphar.2023.175606] [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: 11/12/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/21/2023]
Abstract
Transcription factors regulate gene expression and play crucial roles in development and differentiation of pancreatic β-cell. The expression and/or activities of these transcription factors are reduced when β-cells are chronically exposed to hyperglycemia, which results in loss of β-cell function. Optimal expression of such transcription factors is required to maintain normal pancreatic development and β-cell function. Over many other methods of regenerating β-cells, using small molecules to activate transcription factors has gained insights, resulting in β-cells regeneration and survival. In this review, we discuss the broad spectrum of transcription factors regulating pancreatic β-cell development, differentiation and regulation of these factors in normal and pathological states. Also, we have presented set of potential pharmacological effects of natural and synthetic compounds on activities of transcription factor involved in pancreatic β-cell regeneration and survival. Exploring these compounds and their action on transcription factors responsible for pancreatic β-cell function and survival could be useful in providing new insights for development of small molecule modulators.
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Affiliation(s)
- Kannan Harithpriya
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India
| | - Ravichandran Jayasuriya
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India
| | - Trishla Adhikari
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India
| | - Awantika Rai
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India
| | - Kunka Mohanram Ramkumar
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India.
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6
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Olaniru OE, Hook P, Persaud SJ. Using single-cell multi-omics screening of human fetal pancreas to identify novel players in human beta cell development. Diabet Med 2022; 39:e14992. [PMID: 36302085 PMCID: PMC9828353 DOI: 10.1111/dme.14992] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/20/2022] [Indexed: 01/18/2023]
Abstract
Islet transplantation from organ donors can considerably improve glucose homeostasis and well-being in individuals with type 1 diabetes, where the beta cells are destroyed by the autoimmune attack, but there are insufficient donor islets to make this a widespread therapy. Strategies are therefore being developed to generate unlimited amounts of insulin-producing beta cells from pluripotent stem cells, with the aim that they will be transplanted to treat diabetes. Whilst much progress has been made in recent years in the directed differentiation of pluripotent stem cells to beta-like cells, essential gaps still exist in generating stem cell-derived beta cells that are fully functional in vitro. This short review provides details of recent multi-'omics' studies of the human fetal pancreas, which are revealing granular information on the various cell types in the developing pancreas. It is anticipated that this fine mapping of the pancreatic cells at single-cell resolution will provide additional insights that can be utilised to reproducibly produce human beta cells in vitro that have the functional characteristics of beta cells within native human islets.
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Affiliation(s)
- Oladapo E. Olaniru
- Department of Diabetes, School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Philippa Hook
- Department of Diabetes, School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Shanta J. Persaud
- Department of Diabetes, School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
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7
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An artificial LAMA2-GelMA hydrogel microenvironment for the development of pancreatic endocrine progenitors. Biomaterials 2022; 291:121882. [DOI: 10.1016/j.biomaterials.2022.121882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 10/15/2022] [Accepted: 10/23/2022] [Indexed: 11/21/2022]
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8
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Aghazadeh Y, Sarangi F, Poon F, Nkennor B, McGaugh EC, Nunes SS, Nostro MC. GP2-enriched pancreatic progenitors give rise to functional beta cells in vivo and eliminate the risk of teratoma formation. Stem Cell Reports 2022; 17:964-978. [PMID: 35364010 PMCID: PMC9023812 DOI: 10.1016/j.stemcr.2022.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 11/02/2022] Open
Abstract
Human pluripotent stem cell (hPSC)-derived pancreatic progenitors (PPs) can be differentiated into beta-like cells in vitro and in vivo and therefore have therapeutic potential for type 1 diabetes (T1D) treatment. However, the purity of PPs varies across different hPSC lines, differentiation protocols, and laboratories. The uncommitted cells may give rise to non-pancreatic endodermal, mesodermal, or ectodermal derivatives in vivo, hampering the safety of hPSC-derived PPs for clinical applications and their differentiation efficiency in research settings. Recently, proteomics and transcriptomics analyses identified glycoprotein 2 (GP2) as a PP-specific cell surface marker. The GP2-enriched PPs generate higher percentages of beta-like cells in vitro, but their potential in vivo remains to be elucidated. Here, we demonstrate that the GP2-enriched-PPs give rise to all pancreatic cells in vivo, including functional beta-like cells. Remarkably, GP2 enrichment eliminates the risk of teratomas, which establishes GP2 sorting as an effective method for PP purification and safe pancreatic differentiation.
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Affiliation(s)
- Yasaman Aghazadeh
- McEwen Stem Cell Institute, University Health Network, 101 College Street MaRS, PMCRT 3-916, Toronto, ON M5G 1L7, Canada; Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Farida Sarangi
- McEwen Stem Cell Institute, University Health Network, 101 College Street MaRS, PMCRT 3-916, Toronto, ON M5G 1L7, Canada
| | - Frankie Poon
- McEwen Stem Cell Institute, University Health Network, 101 College Street MaRS, PMCRT 3-916, Toronto, ON M5G 1L7, Canada; Deparment of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Blessing Nkennor
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Biological Sciences, University of Toronto, Scarborough, ON M1C 1A4, Canada
| | - Emily C McGaugh
- McEwen Stem Cell Institute, University Health Network, 101 College Street MaRS, PMCRT 3-916, Toronto, ON M5G 1L7, Canada; Deparment of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Sara S Nunes
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada; Heart & Stroke/Richard Lewar Centre of Excellence, University of Toronto, Toronto, ON M5S 3H2, Canada; Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - M Cristina Nostro
- McEwen Stem Cell Institute, University Health Network, 101 College Street MaRS, PMCRT 3-916, Toronto, ON M5G 1L7, Canada; Deparment of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada.
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9
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Sox9 is involved in the thyroid differentiation program and is regulated by crosstalk between TSH, TGFβ and thyroid transcription factors. Sci Rep 2022; 12:2144. [PMID: 35140269 PMCID: PMC8828901 DOI: 10.1038/s41598-022-06004-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 01/21/2022] [Indexed: 11/09/2022] Open
Abstract
While the signaling pathways and transcription factors involved in the differentiation of thyroid follicular cells, both in embryonic and adult life, are increasingly well understood, the underlying mechanisms and potential crosstalk between the thyroid transcription factors Nkx2.1, Foxe1 and Pax8 and inductive signals remain unclear. Here, we focused on the transcription factor Sox9, which is expressed in Nkx2.1-positive embryonic thyroid precursor cells and is maintained from embryonic development to adulthood, but its function and control are unknown. We show that two of the main signals regulating thyroid differentiation, TSH and TGFβ, modulate Sox9 expression. Specifically, TSH stimulates the cAMP/PKA pathway to transcriptionally upregulate Sox9 mRNA and protein expression, a mechanism that is mediated by the binding of CREB to a CRE site within the Sox9 promoter. Contrastingly, TGFβ signals through Smad proteins to inhibit TSH-induced Sox9 transcription. Our data also reveal that Sox9 transcription is regulated by the thyroid transcription factors, particularly Pax8. Interestingly, Sox9 significantly increased the transcriptional activation of Pax8 and Foxe1 promoters and, consequently, their expression, but had no effect on Nkx2.1. Our study establishes the involvement of Sox9 in thyroid follicular cell differentiation and broadens our understanding of transcription factor regulation of thyroid function.
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10
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Heller S, Li Z, Lin Q, Geusz R, Breunig M, Hohwieler M, Zhang X, Nair GG, Seufferlein T, Hebrok M, Sander M, Julier C, Kleger A, Costa IG. Transcriptional changes and the role of ONECUT1 in hPSC pancreatic differentiation. Commun Biol 2021; 4:1298. [PMID: 34789845 PMCID: PMC8599846 DOI: 10.1038/s42003-021-02818-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 10/24/2021] [Indexed: 02/07/2023] Open
Abstract
Cell type specification during pancreatic development is tightly controlled by a transcriptional and epigenetic network. The precise role of most transcription factors, however, has been only described in mice. To convey such concepts to human pancreatic development, alternative model systems such as pancreatic in vitro differentiation of human pluripotent stem cells can be employed. Here, we analyzed stage-specific RNA-, ChIP-, and ATAC-sequencing data to dissect transcriptional and regulatory mechanisms during pancreatic development. Transcriptome and open chromatin maps of pancreatic differentiation from human pluripotent stem cells provide a stage-specific pattern of known pancreatic transcription factors and indicate ONECUT1 as a crucial fate regulator in pancreas progenitors. Moreover, our data suggest that ONECUT1 is also involved in preparing pancreatic progenitors for later endocrine specification. The dissection of the transcriptional and regulatory circuitry revealed an important role for ONECUT1 within such network and will serve as resource to study human development and disease.
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Affiliation(s)
- Sandra Heller
- grid.410712.1Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Zhijian Li
- grid.1957.a0000 0001 0728 696XInstitute for Computational Genomics, RWTH Aachen University Medical School, Aachen, Germany
| | - Qiong Lin
- grid.420044.60000 0004 0374 4101Bayer AG, Research & Development, Pharmaceuticals, Bioinformatics, Berlin, Germany
| | - Ryan Geusz
- grid.266100.30000 0001 2107 4242Pediatric Diabetes Research Center (PDRC) at the University of California, San Diego, USA
| | - Markus Breunig
- grid.410712.1Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Meike Hohwieler
- grid.410712.1Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Xi Zhang
- grid.410712.1Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Gopika G. Nair
- grid.266102.10000 0001 2297 6811Diabetes Center at the University of California, San Francisco, USA
| | - Thomas Seufferlein
- grid.410712.1Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Matthias Hebrok
- grid.266102.10000 0001 2297 6811Diabetes Center at the University of California, San Francisco, USA
| | - Maike Sander
- grid.266100.30000 0001 2107 4242Pediatric Diabetes Research Center (PDRC) at the University of California, San Diego, USA
| | - Cécile Julier
- grid.4444.00000 0001 2112 9282Université de Paris, Institut Cochin, INSERM U1016, CNRS UMR-8104, Paris, France
| | - Alexander Kleger
- Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany.
| | - Ivan G. Costa
- grid.1957.a0000 0001 0728 696XInstitute for Computational Genomics, RWTH Aachen University Medical School, Aachen, Germany
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11
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Koduru SV, Leberfinger AN, Ozbolat IT, Ravnic DJ. Navigating the Genomic Landscape of Human Adipose Stem Cell-Derived β-Cells. Stem Cells Dev 2021; 30:1153-1170. [PMID: 34514867 DOI: 10.1089/scd.2021.0160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Diabetes is a pandemic manifested through glucose dysregulation mediated by inadequate insulin secretion by beta cells. A beta cell replacement strategy would transform the treatment paradigm from pharmacologic glucose modulation to a genuine cure. Stem cells have emerged as a potential source for beta cell (β-cell) engineering. The detailed generation of functional β-cells from both embryonic and induced pluripotent stem cells has recently been described. Adult stem cells, including adipose derived, may also offer a therapeutic approach, but remain ill defined. In our study, we performed an in-depth assessment of insulin-producing beta cells generated from human adipose, irrespective of donor patient age, gender, and health status. Cellular transformation was confirmed using flow cytometry and single-cell imaging. Insulin secretion was observed with glucose stimulation and abrogated following palmitate exposure, a common free fatty acid implicated in human beta cell dysfunction. We used next-generation sequencing to explore gene expression changes before and after differentiation of patient-matched samples, which revealed more than 5,000 genes enriched. Adipose-derived beta cells displayed comparable gene expression to native β-cells. Pathway analysis demonstrated relevance to stem cell differentiation and pancreatic developmental processes, which are vital to cellular function, structural development, and regulation. We conclude that the functions associated with adipose derived beta cells are mediated through relevant changes in the transcriptome, which resemble those seen in native β-cell morphogenesis and maturation. Therefore, they may represent a viable option for the clinical translation of stem cell-based therapies in diabetes.
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Affiliation(s)
- Srinivas V Koduru
- Irvin S. Zubar Plastic Surgery Research Laboratory, Penn State College of Medicine, Hershey, Pennsylvania, USA.,Division of Plastic Surgery, Department of Surgery, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA.,Department of Cellular and Molecular Physiology, Penn State College of Medicine, Hershey, Pennsylvania, USA
| | - Ashley N Leberfinger
- Irvin S. Zubar Plastic Surgery Research Laboratory, Penn State College of Medicine, Hershey, Pennsylvania, USA.,Division of Plastic Surgery, Department of Surgery, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Ibrahim T Ozbolat
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of Life Sciences, Penn State University, University Park, Pennsylvania, USA.,Engineering Science and Mechanics Department, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Dino J Ravnic
- Irvin S. Zubar Plastic Surgery Research Laboratory, Penn State College of Medicine, Hershey, Pennsylvania, USA.,Division of Plastic Surgery, Department of Surgery, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
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12
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Dudek KD, Osipovich AB, Cartailler JP, Gu G, Magnuson MA. Insm1, Neurod1, and Pax6 promote murine pancreatic endocrine cell development through overlapping yet distinct RNA transcription and splicing programs. G3-GENES GENOMES GENETICS 2021; 11:6358139. [PMID: 34534285 PMCID: PMC8527475 DOI: 10.1093/g3journal/jkab303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/19/2021] [Indexed: 11/13/2022]
Abstract
Insm1, Neurod1, and Pax6 are essential for the formation and function of pancreatic endocrine cells. Here, we report comparative immunohistochemical, transcriptomic, functional enrichment, and RNA splicing analyses of these genes using gene knock-out mice. Quantitative immunohistochemical analysis confirmed that elimination of each of these three factors variably impairs the proliferation, survival, and differentiation of endocrine cells. Transcriptomic analysis revealed that each factor contributes uniquely to the transcriptome although their effects were overlapping. Functional enrichment analysis revealed that genes downregulated by the elimination of Insm1, Neurod1, and Pax6 are commonly involved in mRNA metabolism, chromatin organization, secretion, and cell cycle regulation, and upregulated genes are associated with protein degradation, autophagy, and apoptotic process. Elimination of Insm1, Neurod1, and Pax6 impaired expression of many RNA-binding proteins thereby altering RNA splicing events, including for Syt14 and Snap25, two genes required for insulin secretion. All three factors are necessary for normal splicing of Syt14, and both Insm1 and Pax6 are necessary for the processing of Snap25. Collectively, these data provide new insights into how Insm1, Neurod1, and Pax6 contribute to the formation of functional pancreatic endocrine cells.
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Affiliation(s)
- Karrie D Dudek
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA.,Center for Stem Cell Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Anna B Osipovich
- Center for Stem Cell Biology, Vanderbilt University, Nashville, TN 37232, USA.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232, USA
| | | | - Guoquing Gu
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA.,Center for Stem Cell Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Mark A Magnuson
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA.,Center for Stem Cell Biology, Vanderbilt University, Nashville, TN 37232, USA.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232, USA
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13
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Wu Y, Aegerter P, Nipper M, Ramjit L, Liu J, Wang P. Hippo Signaling Pathway in Pancreas Development. Front Cell Dev Biol 2021; 9:663906. [PMID: 34079799 PMCID: PMC8165189 DOI: 10.3389/fcell.2021.663906] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/12/2021] [Indexed: 12/17/2022] Open
Abstract
The Hippo signaling pathway is a vital regulator of pancreatic development and homeostasis, directing cell fate decisions, morphogenesis, and adult pancreatic cellular plasticity. Through loss-of-function research, Hippo signaling has been found to play key roles in maintaining the proper balance between progenitor cell renewal, proliferation, and differentiation in pancreatic organogenesis. Other studies suggest that overactivation of YAP, a downstream effector of the pathway, promotes ductal cell development and suppresses endocrine cell fate specification via repression of Ngn3. After birth, disruptions in Hippo signaling have been found to lead to de-differentiation of acinar cells and pancreatitis-like phenotype. Further, Hippo signaling directs pancreatic morphogenesis by ensuring proper cell polarization and branching. Despite these findings, the mechanisms through which Hippo governs cell differentiation and pancreatic architecture are yet to be fully understood. Here, we review recent studies of Hippo functions in pancreatic development, including its crosstalk with NOTCH, WNT/β-catenin, and PI3K/Akt/mTOR signaling pathways.
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Affiliation(s)
- Yifan Wu
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States.,Department of Obstetrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Pauline Aegerter
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States
| | - Michael Nipper
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States
| | - Logan Ramjit
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States
| | - Jun Liu
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States
| | - Pei Wang
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, United States
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14
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Aigha II, Abdelalim EM. NKX6.1 transcription factor: a crucial regulator of pancreatic β cell development, identity, and proliferation. Stem Cell Res Ther 2020; 11:459. [PMID: 33121533 PMCID: PMC7597038 DOI: 10.1186/s13287-020-01977-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/15/2020] [Indexed: 12/11/2022] Open
Abstract
Understanding the biology underlying the mechanisms and pathways regulating pancreatic β cell development is necessary to understand the pathology of diabetes mellitus (DM), which is characterized by the progressive reduction in insulin-producing β cell mass. Pluripotent stem cells (PSCs) can potentially offer an unlimited supply of functional β cells for cellular therapy and disease modeling of DM. Homeobox protein NKX6.1 is a transcription factor (TF) that plays a critical role in pancreatic β cell function and proliferation. In human pancreatic islet, NKX6.1 expression is exclusive to β cells and is undetectable in other islet cells. Several reports showed that activation of NKX6.1 in PSC-derived pancreatic progenitors (MPCs), expressing PDX1 (PDX1+/NKX6.1+), warrants their future commitment to monohormonal β cells. However, further differentiation of MPCs lacking NKX6.1 expression (PDX1+/NKX6.1−) results in an undesirable generation of non-functional polyhormonal β cells. The importance of NKX6.1 as a crucial regulator in MPC specification into functional β cells directs attentions to further investigating its mechanism and enhancing NKX6.1 expression as a means to increase β cell function and mass. Here, we shed light on the role of NKX6.1 during pancreatic β cell development and in directing the MPCs to functional monohormonal lineage. Furthermore, we address the transcriptional mechanisms and targets of NKX6.1 as well as its association with diabetes.
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Affiliation(s)
- Idil I Aigha
- College of Health and Life Sciences, Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), Doha, Qatar.,Diabetes Research Center (DRC), Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), PO Box 34110, Doha, Qatar
| | - Essam M Abdelalim
- College of Health and Life Sciences, Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), Doha, Qatar. .,Diabetes Research Center (DRC), Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), PO Box 34110, Doha, Qatar.
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15
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Chunlei H, Chang Z, Sheng L, Yanchun Z, Lulin L, Daozhang C. Down-regulation of MiR-138-5p Protects Chondrocytes ATDC5 and CHON-001 from IL-1 β-induced Inflammation Via Up-regulating SOX9. Curr Pharm Des 2020; 25:4613-4621. [PMID: 31486753 DOI: 10.2174/1381612825666190905163046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 09/01/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Osteoarthritis (OA) pertains to a chronic disease of degenerative joints distinguished by articular cartilage destruction, subchondral bone remodeling, osteophyte formation, and inflammatory changes. Chondrocyte apoptosis is inextricably linked to cartilage degeneration. SRY-related high-mobility-group-box 9 (SOX9) is a well-acknowledged transcription factor in the chondrogenesis. Nevertheless, the detailed function of miR-138-5p/SOX9 in OA remains to be fully clarified. MATERIALS AND METHODS qRT-PCR was performed to measure the expressions of miR-138-5p and SOX9 mRNA in OA and normal cartilage tissues and cells. Human chondrocyte cell lines, CHON-001 and ATDC5, were treated with different doses of interleukin-1β (IL-1β) to simulate the inflammatory response environment of OA. miR-138-5p mimics, miR-138-5p inhibitors, and SOX9 small interfering RNA (siRNA) were constructed and transfected into CHON-001 and ATDC5 cells. CCK-8 was conducted to determine the cell viability and transwell assay was used to monitor the migration of cells. Western blot was carried out to detect the expressions of apoptosis- related factors. Enzyme-linked immunosorbent assay (ELISA) was adopted to measure the contents of inflammatory factors. TargetScan predicted SOX9 was a target gene of miR-138-5p, which was then verified by luciferase assay. RESULTS miR-138-5p expression was down-regulated in OA and regulated SOX9 expression. The downregulation of miR-138-5p facilitated the proliferation and migration of CHON-001 and ATDC5 cells, while impeded their apoptosis and inflammatory response. Besides, down-regulated SOX9 can counteract the promoting effect of down-regulated miR-138-5p on the proliferation and migration of chondrocytes. CONCLUSION miR-138-5p can arrest the proliferation and migration of CHON-001 and ATDC5 via restraining SOX9, and facilitate the apoptosis and inflammation. This study revealed the protective effect of down-regulated miR-138-5p on the inflammatory injury of chondrocytes caused by IL-1β.
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Affiliation(s)
- He Chunlei
- Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong, China.,Department of Orthopedics, The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, Jiangxi, China
| | - Zhao Chang
- Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong, China
| | - Liu Sheng
- Department of Orthopedics, The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, Jiangxi, China
| | - Zhong Yanchun
- Department of Orthopedics, The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, Jiangxi, China
| | - Liu Lulin
- Department of Orthopedics, The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, Jiangxi, China
| | - Cai Daozhang
- Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong, China
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16
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Liu S, Yang R, Yin N, Faiola F. Effects of per- and poly-fluorinated alkyl substances on pancreatic and endocrine differentiation of human pluripotent stem cells. CHEMOSPHERE 2020; 254:126709. [PMID: 32348926 DOI: 10.1016/j.chemosphere.2020.126709] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/03/2020] [Accepted: 04/03/2020] [Indexed: 05/27/2023]
Abstract
Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are typical per- and poly-fluorinated alkyl substances (PFASs) that epidemiological studies have already associated with diabetes. However, insufficient data on their toxicity have been reported to explain any mechanism of action, which could justify such an association. Meanwhile, short-chain PFASs designed to substitute PFOA and PFOS, have already raised increasing concerns for their biosafety. Here, we evaluated whether common PFASs affected pancreatic and endocrine cell development using a human pluripotent stem cell pancreatic induction model and human pancreatic progenitor cell (hPP) endocrine induction model. The short-chain PFASs, pentafluorobenzoic acid, perfluorohexanoic acid, perfluorobutanesulfonic acid, and perfluorohexanesulfonic acid, homologous to PFOA or PFOS, did not significantly disrupt hPP generation, unlike PFOA and PFOS, based on pancreatic and duodenal homeobox 1 (PDX1) expression. However, SRY box 9 (SOX9) expression was suppressed in PDX1+ hPPs. All six PFASs did not disrupt SOX9 expression or hPP proliferation. However, endocrine differentiation of hPPs was affected, as indicated by neurogenin-3 (NGN3) downregulation, owing to abnormal increases in SOX9 and hairy and enhancer of split-1 (HES1) expressions. Thus, hyperactivation of NOTCH signaling was repressed after hPPs committed to the endocrine lineage. In conclusion, our study demonstrates how powerful human pluripotent stem cell-based pancreatic differentiation models can be in developmental toxicity evaluations, compared to traditional toxicity assays, mostly based on live animals. Moreover, our findings suggest that PFASs may alter pancreatic development after the pancreatic domain emerges from the gut tube, and provide insights into their toxicity mechanisms.
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Affiliation(s)
- Shuyu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Wellcome Trust/CRUK Gurdon Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK
| | - Renjun Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Nuoya Yin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Francesco Faiola
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
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17
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He F, Li N, Huang HB, Wang JB, Yang XF, Wang HD, Huang W, Li FR. LSD1 inhibition yields functional insulin-producing cells from human embryonic stem cells. Stem Cell Res Ther 2020; 11:163. [PMID: 32345350 PMCID: PMC7189473 DOI: 10.1186/s13287-020-01674-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 03/15/2020] [Accepted: 04/08/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Human embryonic stem cells represent a potentially unlimited source of insulin-producing cells for diabetes therapy. While tremendous progress has been made in directed differentiation of human embryonic stem cells into IPCs in vitro, the mechanisms controlling its differentiation and function are not fully understood. Previous studies revealed that lysine-specific demethylase 1(LSD1) balanced the self-renewal and differentiation in human induced pluripotent stem cells and human embryonic stem cells. This study aims to explore the role of LSD1 in directed differentiation of human embryonic stem cells into insulin-producing cells. METHODS Human embryonic stem cell line H9 was induced into insulin-producing cells by a four-step differentiation protocol. Lentivirus transfection was applied to knockdown LSD1 expression. Immunofluorescence assay and flow cytometry were utilized to check differentiation efficiency. Western blot was used to examine signaling pathway proteins and differentiation-associated proteins. Insulin/C-peptide release was assayed by ELISA. Statistical analysis between groups was carried out with one-way ANOVA tests or a student's t test when appropriate. RESULTS Inhibition or silencing LSD1 promotes the specification of pancreatic progenitors and finally the commitment of functional insulin-producing β cells; Moreover, inhibition or silencing LSD1 activated ERK signaling and upregulated pancreatic progenitor associated genes, accelerating pre-maturation of pancreatic progenitors, and conferred the NKX6.1+ population with better proliferation ability. IPCs with LSD1 inhibitor tranylcypromine treatment displayed enhanced insulin secretion in response to glucose stimulation. CONCLUSIONS We identify a novel role of LSD1 inhibition in promoting IPCs differentiation from hESCs, which would be emerged as potential intervention for generation of functional pancreatic β cells to cure diabetes.
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Affiliation(s)
- Fei He
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, 510632, China
| | - Ning Li
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, 510632, China
| | - Hai-Bo Huang
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, 510632, China
| | - Jing-Bo Wang
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, 510632, China
| | - Xiao-Fei Yang
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China
- Guangdong Engineering Technology Research Center of Stem Cell and Cell therapy, Shenzhen, 518020, China
- Shenzhen Key Laboratory of Stem Cell Research and Clinical Transformation, Shenzhen, 518020, China
| | - Hua-Dong Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Wei Huang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Fu-Rong Li
- Translational Medicine Collaborative Innovation Center, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, 1017 Dongmen North Road, Shenzhen, 518020, China.
- Guangdong Engineering Technology Research Center of Stem Cell and Cell therapy, Shenzhen, 518020, China.
- Shenzhen Key Laboratory of Stem Cell Research and Clinical Transformation, Shenzhen, 518020, China.
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18
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Farley AM, Braxton DR, Li J, Trounson K, Sakar-Dey S, Nayer B, Ikeda T, Lau KX, Hardikar W, Hasegawa K, Pera MF. Antibodies to a CA 19-9 Related Antigen Complex Identify SOX9 Expressing Progenitor Cells In Human Foetal Pancreas and Pancreatic Adenocarcinoma. Sci Rep 2019; 9:2876. [PMID: 30814526 PMCID: PMC6393509 DOI: 10.1038/s41598-019-38988-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 01/11/2019] [Indexed: 12/21/2022] Open
Abstract
The Sialyl Lewis A antigen, or CA 19-9, is the prototype serum biomarker for adenocarcinoma of the pancreas. Despite extensive clinical study of CA 19-9 in gastrointestinal malignancies, surprisingly little is known concerning the specific cell types that express this marker during development, tissue regeneration and neoplasia. SOX9 is a transcription factor that plays a key role in these processes in foregut tissues. We report the biochemistry and tissue expression of the GCTM-5 antigen, a pancreatic cancer marker related to, but distinct from, CA19-9. This antigen, defined by two monoclonal antibodies recognising separate epitopes on a large glycoconjugate protein complex, is co-expressed with SOX9 by foregut ductal progenitors in the developing human liver and pancreas, and in pancreatic adenocarcinoma. These progenitors are distinct from cell populations identified by DCLK1, LGR5, or canonical markers of liver and pancreatic progenitor cells. Co-expression of this antigen complex and SOX9 also characterises the ductal metaplasia of submucosal glands that occurs during the development of Barrett’s oesophagus. The GCTM-5 antigen complex can be detected in the sera of patients with pancreatic adenocarcinoma. The GCTM-5 epitope shows a much more restricted pattern of expression in the normal adult pancreas relative to CA19-9. Our findings will aid in the identification, characterisation, and monitoring of ductal progenitor cells during development and progression of pancreatic adenocarcinoma in man.
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Affiliation(s)
- Alison M Farley
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - David R Braxton
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Jonathan Li
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
| | - Karl Trounson
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
| | | | - Bhavana Nayer
- Institute for Stem Cell Biology and Regenerative Medicine, Bangalore, India
| | - Tatsuhiko Ikeda
- Institute for Integrated Cell-Materials Science, Kyoto University, Kyoto, Japan
| | - Kevin X Lau
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
| | - Winita Hardikar
- Royal Childrens Hospital, Parkville, Victoria, Australia.,Childrens Medical Research Institute, Parkville, Victoria, Australia
| | - Kouichi Hasegawa
- Institute for Stem Cell Biology and Regenerative Medicine, Bangalore, India.,Institute for Integrated Cell-Materials Science, Kyoto University, Kyoto, Japan
| | - Martin F Pera
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia. .,Florey Neuroscience and Mental Health Institute, Parkville, Victoria, Australia. .,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
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19
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microRNA-690 regulates induced pluripotent stem cells (iPSCs) differentiation into insulin-producing cells by targeting Sox9. Stem Cell Res Ther 2019; 10:59. [PMID: 30767782 PMCID: PMC6376733 DOI: 10.1186/s13287-019-1154-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 01/14/2019] [Accepted: 01/24/2019] [Indexed: 12/31/2022] Open
Abstract
Background The regulatory mechanism of insulin-producing cells (IPCs) differentiation from induced pluripotent stem cells (iPSCs) in vitro is very important in the phylogenetics of pancreatic islets, the molecular pathogenesis of diabetes, and the acquisition of high-quality pancreatic β-cells derived from stem cells for cell therapy. Methods miPSCs were induced for IPCs differentiation. miRNA microarray assays were performed by using total RNA from our iPCs-derived IPCs containing undifferentiated iPSCs and iPSCs-derived IPCSs at day 4, day 14, and day 21 during step 3 to screen the differentially expressed miRNAs (DEmiRNAs) related to IPCs differentiation, and putative target genes of DEmiRNAs were predicted by bioinformatics analysis. miR-690 was selected for further research, and MPCs were transfected by miR-690-agomir to confirm whether it was involved in the regulation of IPCs differentiation in iPSCs. Quantitative Real-Time PCR (qRT-PCR), Western blotting, and immunostaining assays were performed to examine the pancreatic function of IPCs at mRNA and protein level respectively. Flow cytometry and ELISA were performed to detect differentiation efficiency and insulin content and secretion from iPSCs-derived IPCs in response to stimulation at different concentration of glucose. The targeting of the 3′-untranslated region of Sox9 by miR-690 was examined by luciferase assay. Results We found that miR-690 was expressed dynamically during IPCs differentiation according to the miRNA array results and that overexpression of miR-690 significantly impaired the maturation and insulinogenesis of IPCs derived from iPSCs both in vitro and in vivo. Bioinformatic prediction and mechanistic analysis revealed that miR-690 plays a pivotal role during the differentiation of IPCs by directly targeting the transcription factor sex-determining region Y (SRY)-box9. Furthermore, downstream experiments indicated that miR-690 is likely to act as an inactivated regulator of the Wnt signaling pathway in this process. Conclusions We discovered a previously unknown interaction between miR-690 and sox9 but also revealed a new regulatory signaling pathway of the miR-690/Sox9 axis during iPSCs-induced IPCs differentiation. Electronic supplementary material The online version of this article (10.1186/s13287-019-1154-8) contains supplementary material, which is available to authorized users.
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20
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Hashemitabar M, Heidari E. Redefining the signaling pathways from pluripotency to pancreas development: In vitro β-cell differentiation. J Cell Physiol 2018; 234:7811-7827. [PMID: 30480819 DOI: 10.1002/jcp.27736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 10/22/2018] [Indexed: 02/06/2023]
Abstract
Pancreatic β-cells are destroyed by the immune system, in type 1 diabetes (T1D) and are impaired by glucose insensitivity in type 2 diabetes (T2D). Islet-cells transplantation is a promising therapeutic approach based on in vitro differentiation of pluripotent stem cells (PSCs) to insulin-producing cells (IPCs). According to evolutionary stages in β-cell development, there are several distinct checkpoints; each one has a unique characteristic, including definitive endoderm (DE), primitive gut (PG), posterior foregut (PF), pancreatic epithelium (PE), endocrine precursor (EP), and immature β-cells up to functional β-cells. A better understanding of the gene regulatory networks (GRN) and associated transcription factors in each specific developmental stage, guarantees the achievement of the next successful checkpoints and ensures an efficient β-cell differentiation procedure. The new findings in signaling pathways, related to the development of the pancreas are discussed here, including Wnt, Activin/Nodal, FGF, BMP, retinoic acid (RA), sonic hedgehog (Shh), Notch, and downstream regulators, required for β-cell commitment. We also summarized different approaches in the IPCs protocol to conceptually define a standardized system, leading to the creation of a reproducible method for β-cell differentiation. To normalize blood glucose level in diabetic mice, the replacement therapy in the early differentiation stage, such as EP stages was associated with better outcome when compared with the fully differentiated β-cells' graft.
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Affiliation(s)
- Mahmoud Hashemitabar
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Anatomy and Embryology, Faculty of Medicine, Joundishapur University of Medical Sciences, Ahvaz, Iran
| | - Elham Heidari
- Department of Anatomy and Embryology, Faculty of Medicine, Joundishapur University of Medical Sciences, Ahvaz, Iran
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21
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Kondratyeva LG, Chernov IP, Zinovyeva MV, Egorov VI, Kopantzev EP, Sverdlov ED. Heterogeneous Expression of Embryonal Development Master Regulator SOX9 in Patients with Pancreatic Cancer. DOKL BIOCHEM BIOPHYS 2018; 481:208-211. [PMID: 30168061 DOI: 10.1134/s1607672918040087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Indexed: 01/06/2023]
Abstract
The expression levels of the SOX9 gene in fetal, postnatal, and neoplastic pancreatic tissues were compared. In the fetal pancreatic samples, the mean relative level of the SOX9 gene expression was 8 times greater than the normal level. The tumor samples were divided into three groups depending on the SOX9 expression level. The first group showed a 6.5-fold increased expression level of SOX9 with respect to the normal one. The second and normal groups had approximately equal levels expression. The third group showed a 25-fold decreased expression level of SOX9. The discrepancy in the SOX9 expression, associated with the predominance of different functions of this master gene, depends on the poorly predictable individual factors and indicates that SOX9 should be excluded from the potential diagnostic biomarkers of pancreatic cancer.
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Affiliation(s)
- L G Kondratyeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.
| | - I P Chernov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - M V Zinovyeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - V I Egorov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - E P Kopantzev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - E D Sverdlov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
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22
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Lam CJ, Cox AR, Jacobson DR, Rankin MM, Kushner JA. Highly Proliferative α-Cell-Related Islet Endocrine Cells in Human Pancreata. Diabetes 2018; 67:674-686. [PMID: 29326366 PMCID: PMC5860854 DOI: 10.2337/db17-1114] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 01/04/2018] [Indexed: 12/25/2022]
Abstract
The proliferative response of non-β islet endocrine cells in response to type 1 diabetes (T1D) remains undefined. We quantified islet endocrine cell proliferation in a large collection of nondiabetic control and T1D human pancreata across a wide range of ages. Surprisingly, islet endocrine cells with abundant proliferation were present in many adolescent and young-adult T1D pancreata. But the proliferative islet endocrine cells were also present in similar abundance within control samples. We queried the proliferating islet cells with antisera against various islet hormones. Although pancreatic polypeptide, somatostatin, and ghrelin cells did not exhibit frequent proliferation, glucagon-expressing α-cells were highly proliferative in many adolescent and young-adult samples. Notably, α-cells only comprised a fraction (∼1/3) of the proliferative islet cells within those samples; most proliferative cells did not express islet hormones. The proliferative hormone-negative cells uniformly contained immunoreactivity for ARX (indicating α-cell fate) and cytoplasmic Sox9 (Sox9Cyt). These hormone-negative cells represented the majority of islet endocrine Ki67+ nuclei and were conserved from infancy through young adulthood. Our studies reveal a novel population of highly proliferative ARX+ Sox9Cyt hormone-negative cells and suggest the possibility of previously unrecognized islet development and/or lineage plasticity within adolescent and adult human pancreata.
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Affiliation(s)
- Carol J Lam
- McNair Medical Institute, Baylor College of Medicine, Houston, TX
- Diabetes and Endocrinology, Texas Children's Hospital, Houston, TX
| | - Aaron R Cox
- McNair Medical Institute, Baylor College of Medicine, Houston, TX
- Diabetes and Endocrinology, Texas Children's Hospital, Houston, TX
| | - Daniel R Jacobson
- Division of Endocrinology and Diabetes, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - Matthew M Rankin
- Division of Endocrinology and Diabetes, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - Jake A Kushner
- McNair Medical Institute, Baylor College of Medicine, Houston, TX
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23
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Genome-wide DNA methylation analysis reveals molecular subtypes of pancreatic cancer. Oncotarget 2018; 8:28990-29012. [PMID: 28423671 PMCID: PMC5438707 DOI: 10.18632/oncotarget.15993] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 02/12/2017] [Indexed: 12/13/2022] Open
Abstract
Pancreatic cancer (PC) is the fourth leading cause of cancer deaths in the United States with a five-year patient survival rate of only 6%. Early detection and treatment of this disease is hampered due to lack of reliable diagnostic and prognostic markers. Recent studies have shown that dynamic changes in the global DNA methylation and gene expression patterns play key roles in the PC development; hence, provide valuable insights for better understanding the initiation and progression of PC. In the current study, we used DNA methylation, gene expression, copy number, mutational and clinical data from pancreatic patients. We independently investigated the DNA methylation and differential gene expression profiles between normal and tumor samples and correlated methylation levels with gene expression patterns. We observed a total of ~23-thousand differentially methylated CpG sites (Δβ≥0.1) between normal and tumor samples, where majority of the CpG sites are hypermethylated in PC, and this phenomenon is more prominent in the 5′UTRs and promoter regions compared to the gene bodies. Differential methylation is observed in genes associated with the homeobox domain, cell division and differentiation, cytoskeleton, epigenetic regulation and development, pancreatic development and pancreatic signaling and pancreatic cancer core signaling pathways. Correlation analysis suggests that methylation in the promoter region and 5′UTR has mostly negative correlations with gene expression while gene body and 3′UTR associated methylation has positive correlations. Regulatory element analysis suggests that HOX cluster and histone core proteins are upstream regulators of hypomethylation, while SMAD4, STAT4, STAT5B and zinc finger proteins (ZNF) are upstream regulators of hypermethylation. Non-negative matrix factorization (NMF) clustering of differentially methylated sites generated three clusters in PCs suggesting the existence of distinct molecular subtypes. Cluster 1 and cluster 2 showed samples enriched with clinical phenotypes like neoplasm histological grade and pathologic T-stage T3, respectively, while cluster 3 showed the enrichment of samples with neoplasm histological grade G1. To the best of our knowledge, this is the first genome-scale methylome analysis of PC data from TCGA. Our clustering analysis provides a strong basis for future work on the molecular subtyping of epigenetic regulation in pancreatic cancer.
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Characterization and Differentiation of Sorted Human Fetal Pancreatic ALDHhi and ALDHhi/CD133+ Cells Toward Insulin-Expressing Cells. Stem Cells Dev 2018; 27:275-286. [DOI: 10.1089/scd.2017.0135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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25
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Leung CON, Mak WN, Kai AKL, Chan KS, Lee TKW, Ng IOL, Lo RCL. Sox9 confers stemness properties in hepatocellular carcinoma through Frizzled-7 mediated Wnt/β-catenin signaling. Oncotarget 2017; 7:29371-86. [PMID: 27105493 PMCID: PMC5045402 DOI: 10.18632/oncotarget.8835] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 03/29/2016] [Indexed: 01/01/2023] Open
Abstract
Sox9, an SRY-related HMG box transcription factor, is a progenitor/precursor cell marker of the liver expressed during embryogenesis and following liver injury. In this study, we investigated the role of Sox9 and its molecular mechanism with reference to stemness properties in hepatocellular carcinoma (HCC). Here, we observed upregulation of Sox9 in human HCC tissues compared with the non-tumorous liver counterparts (p < 0.001). Upregulation of Sox9 transcript level was associated with poorer tumor cell differentiation (p = 0.003), venous invasion (p = 0.026), advanced tumor stage (p = 0.044) and shorter overall survival (p = 0.042). Transcript levels of Sox9 and CD24 were positively correlated. Silencing of Sox9 in HCC cells inhibited in vitro cell proliferation and tumorsphere formation, sensitized HCC cells to chemotherapeutic agents, and suppressed in vivo tumorigenicity. In addition, knockdown of Sox9 suppressed HCC cell migration, invasion, and in vivo lung metastasis. Further studies showed that Sox9 endowed stemness features through activation of Wnt/β-catenin signaling, which was confirmed by the partial rescue effect on tumorigenicity and self-renewal upon transfection of active β-catenin in Sox9 knockdown cells. By ChIP and luciferase promoter assays, Frizzled-7 was identified to be the direct transcriptional target of Sox9. In conclusion, Sox9 confers stemness properties of HCC through Frizzled-7 mediated Wnt/β-catenin pathway.
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Affiliation(s)
- Carmen Oi-Ning Leung
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Wing-Nga Mak
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Alan Ka-Lun Kai
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Kwan-Shuen Chan
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Terence Kin-Wah Lee
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong.,State Key Laboratory for Liver Research, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Irene Oi-Lin Ng
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong.,State Key Laboratory for Liver Research, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Regina Cheuk-Lam Lo
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong.,State Key Laboratory for Liver Research, The University of Hong Kong, Pok Fu Lam, Hong Kong
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26
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Jin F, Jiang K, Ji S, Wang L, Ni Z, Huang F, Li C, Chen R, Zhang H, Hu Z, Zha X. Deficient TSC1/TSC2-complex suppression of SOX9-osteopontin-AKT signalling cascade constrains tumour growth in tuberous sclerosis complex. Hum Mol Genet 2017; 26:407-419. [PMID: 28013293 DOI: 10.1093/hmg/ddw397] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 11/17/2016] [Indexed: 12/29/2022] Open
Abstract
Tuberous sclerosis complex (TSC) is an autosomal dominant genetic disorder featured with multi-organ benign tumours. Disruption of TSC1/TSC2 complex suppression on mammalian/mechanistic target of rapamycin (mTOR) signalling causes TSC. Hyperactive mTOR-mediated negative feedback regulation of AKT partially contributes to the benign nature of TSC-associated tumours. In this study, we demonstrated that osteopontin (OPN) was dramatically reduced by loss of TSC1/TSC2 complex in Tsc2-null mouse embryonic fibroblasts (MEFs), rat uterine leiomyoma-derived Tsc2-deficient cells, genetically modified mouse TSC models, and clinical samples. TSC1/TSC2 complex upregulation of OPN expression is mediated by transcription factor SOX9 in an mTOR-independent manner. Moreover, ablation of OPN by deficient TSC1/TSC2 complex contributed to inactivation of AKT in TSC cells. Lastly, the abundance of OPN dictated the potency of cell proliferation and tumour development. Therefore, loss of TSC1/TSC2 complex led to mTOR-independent inhibition of AKT at least partially through downregulation of the SOX9-OPN signalling cascade. We suggest that the decreased SOX9-OPN-AKT signalling pathway safeguard against the development of malignant tumours in TSC patients.
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Affiliation(s)
- Fuquan Jin
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Keguo Jiang
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Department of Nephrology, The Third Affiliated Hospital, Anhui Medical University, Hefei, People's Republic of China
| | - Shuang Ji
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Department of Respiratory Medicine, The First Affiliated Hospital, Anhui Medical University, Hefei, People's Republic of China
| | - Li Wang
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Zhaofei Ni
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Fuqiang Huang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Chunjia Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Rongrong Chen
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Zhongdong Hu
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Xiaojun Zha
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Institute of Dermatology, Anhui Medical University, Hefei, People's Republic of China
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27
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Alterations in the programming of energy metabolism in adolescents with background exposure to dioxins, dl-PCBs and PBDEs. PLoS One 2017; 12:e0184006. [PMID: 28898241 PMCID: PMC5595283 DOI: 10.1371/journal.pone.0184006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/16/2017] [Indexed: 01/01/2023] Open
Abstract
Objectives Dioxins and PCBs are highly toxic and persistent environmental pollutants that are measurable in humans worldwide. These persistent organic pollutants are associated with a higher incidence of diabetes mellitus. We hypothesise that perinatal (background) exposure to industrial pollutants like dioxins also influences body mass development and energy metabolism in later life. Study design In The Netherlands, the perinatal exposure (prenatal exposure and postnatal lactational intake) to dioxins has been studied prospectively since 1987. Fasting glucose, insulin, HbA1c and leptin were analysed in 33 children of the original cohort of 60. BMI, glucose:insulin and BMI:leptin ratios were calculated. Prenatal exposure, lactational intake and current serum levels of dioxins (PCDD/F), dl-PCBs and PBDE concentrations were determined using (HR)GC-MS. Results Prenatal dioxin (PCDD/F) exposure was positively correlated to the glucose:insulin ratio (p = 0.024) and negatively correlated to the fasting insulin concentration (p = 0.017) in adolescence. Postnatal lactational PCDD/F intake was also negatively correlated to fasting insulin concentration (p = 0.028). Current serum levels of PCDD/Fs and total TEQ (dl-PCBs+PCDD/Fs) were positively correlated to the fasting serum glucose concentration (p = 0.015 and p = 0.037, respectively).No metabolic effects were seen in association with current serum levels of PBDEs. A positive correlation between the insulin and leptin concentrations (p = 0.034) was observed. No effects were found on leptin levels, BMI:leptin ratio, HbA1c levels or BMI. Discussion/Conclusion This study indicates that prenatal and lactational exposure influences glucose metabolism in adolescents, presumably through a negative effect on insulin secretion by pancreatic beta cells. Additionally, the very low recent background exposure to dioxins in puberty possibly has an effect on the glucose level.
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28
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Lee S, Lee CM, Kim SC. Adult human pancreas-derived cells expressing stage-specific embryonic antigen 4 differentiate into Sox9-expressing and Ngn3-expressing pancreatic ducts in vivo. Stem Cell Res Ther 2016; 7:162. [PMID: 27836003 PMCID: PMC5105312 DOI: 10.1186/s13287-016-0422-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/10/2016] [Accepted: 10/14/2016] [Indexed: 12/28/2022] Open
Abstract
Background Tissue-specific stem/progenitor cells are found in various adult tissues and may have the capacity for lineage-specific differentiation, facilitating applications in autologous transplantation. Stage-specific embryonic antigen 4 (SSEA-4), an early embryonic glycolipid antigen, is expressed in cells derived from adult human pancreas exocrine tissue. Here, we examined the characteristics and lineage-specific differentiation capacity of SSEA-4+ cells. Methods Human adult partial pancreas tissues were obtained from different donors and cultured in vitro. SSEA-4+ and CA19-9+ cells were isolated from adult human pancreas exocrine cells using magnetic-activated cell sorting, and gene expression was validated by quantitative polymerase chain reaction. To confirm in-vivo differentiation, SSEA-4+ and CA19-9+ cells were transplanted into the dorsal subcutaneous region of mice. Finally, morphological features of differentiated areas were confirmed by immunostaining and morphometric analysis. Results SSEA-4-expressing cells were detected in isolated pancreas exocrine cells from adult humans. These SSEA-4+ cells exhibited coexpression of CA19-9, a marker of pancreatic duct cells, but not amylase expression, as shown by immunostaining and flow cytometry. SSEA-4+ cells exhibited higher relative expression of Oct4, Nanog, Klf4, Sox2, and c-Myc mRNAs than CA19-9+ cells. Pancreatic intralobular ducts (PIDs) were generated from SSEA-4+ or CA19-9+ cells in vivo at 5 weeks after transplantation. However, newly formed PIDs from CA19-9+ cells were less abundant and showed an incomplete PID morphology. In contrast, newly formed PIDs from SSEA-4+ cells were abundant in the transplanted area and showed a crowded morphology, typical of PIDs. Sox9 and Ngn3, key transcription factors associated with pancreatic development and regeneration, were expressed in PIDs from SSEA-4+ cells. Conclusions SSEA-4-expressing cells in the adult human pancreas may have the potential for regeneration of the pancreas and may be used as a source of stem/progenitor cells for pancreatic cell lineage-specific differentiation. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0422-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Song Lee
- Asan Institute for Life Science, Asan Medical Center, Seoul, Republic of Korea.,Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea
| | - Chan Mi Lee
- Asan Institute for Life Science, Asan Medical Center, Seoul, Republic of Korea.,Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea
| | - Song Cheol Kim
- Asan Institute for Life Science, Asan Medical Center, Seoul, Republic of Korea. .,Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
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29
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Jiang FX, Morahan G. Insulin-secreting β cells require a post-genomic concept. World J Diabetes 2016; 7:198-208. [PMID: 27226815 PMCID: PMC4873311 DOI: 10.4239/wjd.v7.i10.198] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 03/18/2016] [Indexed: 02/05/2023] Open
Abstract
Pancreatic insulin-secreting β cells are essential in maintaining normal glucose homeostasis accomplished by highly specialized transcription of insulin gene, of which occupies up to 40% their transcriptome. Deficiency of these cells causes diabetes mellitus, a global public health problem. Although tremendous endeavors have been made to generate insulin-secreting cells from human pluripotent stem cells (i.e., primitive cells capable of giving rise to all cell types in the body), a regenerative therapy to diabetes has not yet been established. Furthermore, the nomenclature of β cells has become inconsistent, confusing and controversial due to the lack of standardized positive controls of developmental stage-matched in vivo cells. In order to minimize this negative impact and facilitate critical research in this field, a post-genomic concept of pancreatic β cells might be helpful. In this review article, we will briefly describe how β cells were discovered and islet lineage is developed that may help understand the cause of nomenclatural controversy, suggest a post-genomic definition and finally provide a conclusive remark on future research of this pivotal cell.
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30
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Purba TS, Haslam IS, Shahmalak A, Bhogal RK, Paus R. Mapping the expression of epithelial hair follicle stem cell-related transcription factors LHX2 and SOX9 in the human hair follicle. Exp Dermatol 2016; 24:462-7. [PMID: 25808706 DOI: 10.1111/exd.12700] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 01/02/2023]
Abstract
In the murine hair follicle (HF), the transcription factors LHX2 and SOX9 are implicated in epithelial hair follicle stem cell (eHFSC) self-renewal and the maintenance of eHFSC niche characteristics. However, the exact expression patterns of LHX2 and SOX9 in the human HF are unclear. Therefore, we have quantitatively mapped the localisation of known human eHFSC markers keratin 15 (K15) and keratin 19 (K19) in the outer root sheath (ORS) of male occipital scalp anagen HFs and related this to the localisation of LHX2 and SOX9 protein expression. As expected, K15(+) and K19(+) cells represented two distinct progenitor cell populations in the bulge and in the proximal bulb ORS (pbORS). Interestingly, cell fluorescence for K19 was significantly stronger within the pbORS versus the bulge, and vice versa for K15, describing a hitherto unrecognised differential expression pattern. LHX2 and SOX9 expressing cells were distributed throughout the ORS, including the bulge, but were not restricted to it. SOX9 expression was most prominent in the ORS immediately below the human bulge, whereas LHX2(+) cells were similarly distributed between the sub-bulge and pbORS, that is compartments not enriched with quiescent eHFSCs. During catagen development, the intensity of LHX2 and SOX9 protein expression increased in the proximal HF epithelium. Double immunostaining showed that the majority of SOX9(+) cells in the human anagen HF epithelium did not co-express K15, K19 or LHX2. This expression profile suggests that LHX2 and SOX9 highlight distinct epithelial progenitor cell populations, in addition to K15(+) or K19(+) cells, that could play an important role in the maintenance of the human HF epithelium.
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Affiliation(s)
- Talveen S Purba
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | - Iain S Haslam
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | | | | | - Ralf Paus
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,Department of Dermatology, University of Münster, Münster, Germany
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31
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Li XY, Zhai WJ, Teng CB. Notch Signaling in Pancreatic Development. Int J Mol Sci 2015; 17:ijms17010048. [PMID: 26729103 PMCID: PMC4730293 DOI: 10.3390/ijms17010048] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 12/22/2015] [Accepted: 12/24/2015] [Indexed: 12/12/2022] Open
Abstract
The Notch signaling pathway plays a significant role in embryonic cell fate determination and adult tissue homeostasis. Various studies have demonstrated the deep involvement of Notch signaling in the development of the pancreas and the lateral inhibition of Notch signaling in pancreatic progenitor differentiation and maintenance. The targeted inactivation of the Notch pathway components promotes premature differentiation of the endocrine pancreas. However, there is still the contrary opinion that Notch signaling specifies the endocrine lineage. Here, we review the current knowledge of the Notch signaling pathway in pancreatic development and its crosstalk with the Wingless and INT-1 (Wnt) and fibroblast growth factor (FGF) pathways.
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Affiliation(s)
- Xu-Yan Li
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
- College of Life Sciences, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China.
| | - Wen-Jun Zhai
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
| | - Chun-Bo Teng
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
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32
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Jiang FX, Morahan G. Multipotent pancreas progenitors: Inconclusive but pivotal topic. World J Stem Cells 2015; 7:1251-1261. [PMID: 26730269 PMCID: PMC4691693 DOI: 10.4252/wjsc.v7.i11.1251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 08/20/2015] [Accepted: 11/11/2015] [Indexed: 02/07/2023] Open
Abstract
The establishment of multipotent pancreas progenitors (MPP) should have a significant impact not only on the ontology of the pancreas, but also for the translational research of glucose-responding endocrine β-cells. Deficiency of the latter may lead to the pandemic type 1 or type 2 diabetes mellitus, a metabolic disorder. An ideal treatment of which would potentially be the replacement of destroyed or failed β-cells, by restoring function of endogenous pancreatic endocrine cells or by transplantation of donor islets or in vitro generated insulin-secreting cells. Thus, considerable research efforts have been devoted to identify MPP candidates in the pre- and post-natal pancreas for the endogenous neogenesis or regeneration of endocrine insulin-secreting cells. In order to advance this inconclusive but critical field, we here review the emerging concepts, recent literature and newest developments of potential MPP and propose measures that would assist its forward progression.
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Riopel M, Li J, Trinder M, Fellows GF, Wang R. Fibrin supports human fetal islet-epithelial cell differentiation via p70(s6k) and promotes vascular formation during transplantation. J Transl Med 2015; 95:925-36. [PMID: 26006020 DOI: 10.1038/labinvest.2015.74] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 03/11/2015] [Accepted: 04/06/2015] [Indexed: 12/23/2022] Open
Abstract
The human fetal pancreas expresses a variety of extracellular matrix (ECM) binding receptors known as integrins. A provisional ECM protein found in blood clots that can bind to integrin receptors and promote β cell function and survival is fibrin. However, its role in support of human fetal pancreatic cells is unknown. We investigated how fibrin promotes human fetal pancreatic cell differentiation in vitro and in vivo. Human fetal pancreata were collected from 15 to 21 weeks of gestation and collagenase digested. Cells were then plated on tissue-culture polystyrene, or with 2D or 3D fibrin gels up to 2 weeks, or subcutaneously transplanted in 3D fibrin gels. The human fetal pancreas contained rich ECM proteins and expressed integrin αVβ3. Fibrin-cultured human fetal pancreatic cells had significantly increased expression of PDX-1, glucagon, insulin, and VEGF-A, along with increased integrin αVβ3 and phosphorylated FAK and p70(s6k). Fibrin-cultured cells treated with rapamycin, the mTOR pathway inhibitor, had significantly decreased phospho-p70(s6k) and PDX-1 expression. Transplanting fibrin-mixed cells into nude mice improved vascularization compared with collagen controls. These results suggest that fibrin supports islet cell differentiation via p70(s6k) and promotes vascularization in human fetal islet-epithelial clusters in vivo.
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Affiliation(s)
- Matthew Riopel
- 1] Children's Health Research Institute, London, Ontario, Canada [2] Department of Pathology, Western University, London, Ontario, Canada
| | - Jinming Li
- 1] Children's Health Research Institute, London, Ontario, Canada [2] Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Mark Trinder
- 1] Children's Health Research Institute, London, Ontario, Canada [2] Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - George F Fellows
- Department of Obstetrics and Gynecology, Western University, London, Ontario, Canada
| | - Rennian Wang
- 1] Children's Health Research Institute, London, Ontario, Canada [2] Department of Physiology and Pharmacology, Western University, London, Ontario, Canada [3] Department of Medicine, Western University, London, Ontario, Canada
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Xu EE, Krentz NAJ, Tan S, Chow SZ, Tang M, Nian C, Lynn FC. SOX4 cooperates with neurogenin 3 to regulate endocrine pancreas formation in mouse models. Diabetologia 2015; 58:1013-23. [PMID: 25652387 DOI: 10.1007/s00125-015-3507-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 01/09/2015] [Indexed: 10/24/2022]
Abstract
AIMS/HYPOTHESIS The sex-determining region Y (SRY)-related high mobility group (HMG) box (SOX) family of transcription factors is essential for normal organismal development. Despite the longstanding knowledge that many SOX family members are expressed during pancreas development, a role for many of these factors in the establishment of insulin-producing beta cell fate remains to be determined. The aim of this study is to elucidate the role of SOX4 during beta cell development. METHODS We used pancreas and endocrine progenitor mouse knockouts of Sox4 to uncover the roles of SOX4 during pancreas development. Lineage tracing and in vitro models were used to determine how SOX4 regulates beta cell formation and understand the fate of Sox4-null endocrine lineage cells. RESULTS This study demonstrates a progenitor cell-autonomous role for SOX4 in regulating the genesis of beta cells and shows that it is required at multiple stages of the process. SOX4 deletion in the multipotent pancreatic progenitors resulted in impaired endocrine progenitor cell differentiation. Deletion of SOX4 later in the Neurog3-expressing cells also caused reductions in beta cells. Lineage studies showed loss of Sox4 in endocrine progenitors resulted in a block in terminal islet cell differentiation that was attributed to reduction in the production of key beta cell specification factors. CONCLUSIONS/INTERPRETATION These results demonstrate that SOX4 is essential for normal endocrine pancreas development both concomitant with, and downstream of, the endocrine fate decision. In conclusion, these studies position Sox4 temporally in the endocrine differentiation programme and provide a new target for improving in vitro differentiation of glucose-responsive pancreatic beta cells.
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Affiliation(s)
- Eric E Xu
- Diabetes Research Program, Child and Family Research Institute, A4-184, 950 West 28 Ave, Vancouver, BC, V5Z 4H4, Canada
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35
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Nair G, Hebrok M. Islet formation in mice and men: lessons for the generation of functional insulin-producing β-cells from human pluripotent stem cells. Curr Opin Genet Dev 2015; 32:171-80. [PMID: 25909383 DOI: 10.1016/j.gde.2015.03.004] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 02/24/2015] [Accepted: 03/11/2015] [Indexed: 12/23/2022]
Abstract
The Islets of Langerhans are crucial 'micro-organs' embedded in the glandular exocrine pancreas that regulate nutrient metabolism. They not only synthesize, but also secrete endocrine hormones in a modulated fashion in response to physiologic metabolic demand. These highly sophisticated structures with intricate organization of multiple cell types, namely endocrine, vascular, neuronal and mesenchymal cells, have evolved to perform this task to perfection over time. Not surprisingly, islet architecture and function are dissimilar between humans and typically studied model organisms, such as rodents and zebrafish. Further, recent findings also suggest noteworthy differences in human islet development from that in mouse, including delayed appearance and gradual resolution of key differentiation markers, a single-phase of endocrine differentiation, and prenatal association of developing islets with neurovascular milieu. In light of these findings, it is imperative that a systematic study is undertaken to compare islet development between human and mouse. Illuminating inter-species differences in islet development will likely be critical in furthering our pursuit to generate an unlimited supply of truly functional and fully mature β-cells from human pluripotent stem cell (hPSC) sources for therapeutic purposes.
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Affiliation(s)
- Gopika Nair
- Diabetes Center, Department of Medicine, University of California, San Francisco, CA 94143, USA
| | - Matthias Hebrok
- Diabetes Center, Department of Medicine, University of California, San Francisco, CA 94143, USA.
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36
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TALEN/CRISPR-mediated eGFP knock-in add-on at the OCT4 locus does not impact differentiation of human embryonic stem cells towards endoderm. PLoS One 2014; 9:e114275. [PMID: 25474420 PMCID: PMC4256397 DOI: 10.1371/journal.pone.0114275] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 11/08/2014] [Indexed: 12/22/2022] Open
Abstract
Human embryonic stem cells (hESCs) have great promise as a source of unlimited transplantable cells for regenerative medicine. However, current progress on producing the desired cell type for disease treatment has been limited due to an insufficient understanding of the developmental processes that govern their differentiation, as well as a paucity of tools to systematically study differentiation in the lab. In order to overcome these limitations, cell-type reporter hESC lines will be required. Here we outline two strategies using Transcription Activator Like Effector Nucleases (TALENs) and Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-CRISPR-Associated protein (Cas) to create OCT4-eGFP knock-in add-on hESC lines. Thirty-one and forty-seven percent of clones were correctly modified using the TALEN and CRISPR-Cas9 systems, respectively. Further analysis of three correctly targeted clones demonstrated that the insertion of eGFP in-frame with OCT4 neither significantly impacted expression from the wild type allele nor did the fusion protein have a dramatically different biological stability. Importantly, the OCT4-eGFP fusion was easily detected using microscopy, flow cytometry and western blotting. The OCT4 reporter lines remained equally competent at producing CXCR4+ definitive endoderm that expressed a panel of endodermal genes. Moreover, the genomic modification did not impact the formation of NKX6.1+/SOX9+ pancreatic progenitor cells following directed differentiation. In conclusion, these findings demonstrate for the first time that CRISPR-Cas9 can be used to modify OCT4 and highlight the feasibility of creating cell-type specific reporter hESC lines utilizing genome-editing tools that facilitate homologous recombination.
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Conrad E, Stein R, Hunter CS. Revealing transcription factors during human pancreatic β cell development. Trends Endocrinol Metab 2014; 25:407-14. [PMID: 24831984 PMCID: PMC4167784 DOI: 10.1016/j.tem.2014.03.013] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 03/19/2014] [Accepted: 03/25/2014] [Indexed: 12/14/2022]
Abstract
Developing cell-based diabetes therapies requires examining transcriptional mechanisms underlying human β cell development. However, increased knowledge is hampered by low availability of fetal pancreatic tissue and gene targeting strategies. Rodent models have elucidated transcription factor roles during islet organogenesis and maturation, but differences between mouse and human islets have been identified. The past 5 years have seen strides toward generating human β cell lines, the examination of human transcription factor expression, and studies utilizing induced pluripotent stem cells (iPS cells) and human embryonic stem (hES) cells to generate β-like cells. Nevertheless, much remains to be resolved. We present current knowledge of developing human β cell transcription factor expression, as compared to rodents. We also discuss recent studies employing transcription factor or epigenetic modulation to generate β cells.
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Affiliation(s)
- Elizabeth Conrad
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, 2215 Garland Ave, Nashville, TN 37232, USA
| | - Roland Stein
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, 2215 Garland Ave, Nashville, TN 37232, USA
| | - Chad S Hunter
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, 2215 Garland Ave, Nashville, TN 37232, USA.
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Li J, Feng ZC, Yeung FSH, Wong MRM, Oakie A, Fellows GF, Goodyer CG, Hess DA, Wang R. Aldehyde dehydrogenase 1 activity in the developing human pancreas modulates retinoic acid signalling in mediating islet differentiation and survival. Diabetologia 2014; 57:754-64. [PMID: 24374552 DOI: 10.1007/s00125-013-3147-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 11/29/2013] [Indexed: 01/16/2023]
Abstract
AIMS/HYPOTHESIS Aldehyde dehydrogenase 1 (ALDH1), a human stem-cell marker, is an enzyme responsible for converting retinaldehydes to retinoic acids (RAs) to modulate cell differentiation. However, data on expression levels and functional roles of ALDH1 during human fetal pancreatic development are limited. The focus of this study was to characterise ALDH1 expression patterns and to determine its functional role in islet cell differentiation. METHODS The presence of ALDH1 in the human fetal pancreas (8-22 weeks) was characterised by microarray, quantitative RT-PCR, western blotting and immunohistological approaches. Isolated human fetal islet-epithelial cell clusters were treated with ALDH1 inhibitors, retinoic acid receptor (RAR) agonists and ALDH1A1 small interfering (si)RNA. RESULTS In the developing human pancreatic cells, high ALDH1 activity frequently co-localised with key stem-cell markers as well as endocrine transcription factors. A high level of ALDH1 was expressed in newly differentiated insulin(+) cells and this decreased as development progressed. Pharmacological inhibition of ALDH1 activity in human fetal islet-epithelial cell clusters resulted in reduced endocrine cell differentiation and increased cell apoptosis, and was reversed with co-treatment of RAR/RXR agonists. Furthermore, siRNA knockdown of ALDH1A1 significantly decreased RAR expression and induced cell apoptosis via suppression of the phosphoinositide 3-kinase (PI3K) pathway and activation of caspase signals. CONCLUSIONS/INTERPRETATION Our findings indicate that ALDH1(+) cells represent a pool of endocrine precursors in the developing human pancreas and that ALDH1 activity is required during endocrine cell differentiation. Inhibition of ALDH1-mediated retinoid signalling impairs human fetal islet cell differentiation and survival.
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Affiliation(s)
- Jinming Li
- Children's Health Research Institute, Western University, 800 Commissioners Road East, London, ON, Canada, N6C 2V5
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Belo J, Krishnamurthy M, Oakie A, Wang R. The Role of SOX9 Transcription Factor in Pancreatic and Duodenal Development. Stem Cells Dev 2013; 22:2935-43. [DOI: 10.1089/scd.2013.0106] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Jamie Belo
- Children's Health Research Institute, Western University, London, Canada
| | | | - Amanda Oakie
- Children's Health Research Institute, Western University, London, Canada
- Department of Physiology and Pharmacology, Western University, London, Canada
| | - Rennian Wang
- Children's Health Research Institute, Western University, London, Canada
- Department of Physiology and Pharmacology, Western University, London, Canada
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Arda HE, Benitez CM, Kim SK. Gene regulatory networks governing pancreas development. Dev Cell 2013; 25:5-13. [PMID: 23597482 DOI: 10.1016/j.devcel.2013.03.016] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Indexed: 12/13/2022]
Abstract
Elucidation of cellular and gene regulatory networks (GRNs) governing organ development will accelerate progress toward tissue replacement. Here, we have compiled reference GRNs underlying pancreas development from data mining that integrates multiple approaches, including mutant analysis, lineage tracing, cell purification, gene expression and enhancer analysis, and biochemical studies of gene regulation. Using established computational tools, we integrated and represented these networks in frameworks that should enhance understanding of the surging output of genomic-scale genetic and epigenetic studies of pancreas development and diseases such as diabetes and pancreatic cancer. We envision similar approaches would be useful for understanding the development of other organs.
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Affiliation(s)
- H Efsun Arda
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305-5329, USA
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