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Aloy-Reverté C, Moreno-Amador JL, Nacher M, Montanya E, Semino CE. Use of RGD-Functionalized Sandwich Cultures to Promote Redifferentiation of Human Pancreatic Beta Cells AfterIn VitroExpansion. Tissue Eng Part A 2018; 24:394-406. [DOI: 10.1089/ten.tea.2016.0493] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Caterina Aloy-Reverté
- Department of Bioengineering, Tissue Engineering Laboratory, IQS School of Engineering, Barcelona, Spain
| | - José L. Moreno-Amador
- Hospital Universitari Bellvitge-Biomedical Research Institute (IDIBELL), Barcelona, Spain
- CIBER Diabetes and Metabolic Diseases (CIBERDEM), Barcelona, Spain
- University of Barcelona, Barcelona, Spain
| | - Montserrat Nacher
- Hospital Universitari Bellvitge-Biomedical Research Institute (IDIBELL), Barcelona, Spain
- CIBER Diabetes and Metabolic Diseases (CIBERDEM), Barcelona, Spain
| | - Eduard Montanya
- Hospital Universitari Bellvitge-Biomedical Research Institute (IDIBELL), Barcelona, Spain
- CIBER Diabetes and Metabolic Diseases (CIBERDEM), Barcelona, Spain
- University of Barcelona, Barcelona, Spain
| | - Carlos E. Semino
- Department of Bioengineering, Tissue Engineering Laboratory, IQS School of Engineering, Barcelona, Spain
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El-Gohary Y, Tulachan S, Wiersch J, Guo P, Welsh C, Prasadan K, Paredes J, Shiota C, Xiao X, Wada Y, Diaz M, Gittes G. A smad signaling network regulates islet cell proliferation. Diabetes 2014; 63:224-36. [PMID: 24089514 PMCID: PMC3868054 DOI: 10.2337/db13-0432] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Pancreatic β-cell loss and dysfunction are critical components of all types of diabetes. Human and rodent β-cells are able to proliferate, and this proliferation is an important defense against the evolution and progression of diabetes. Transforming growth factor-β (TGF-β) signaling has been shown to affect β-cell development, proliferation, and function, but β-cell proliferation is thought to be the only source of new β-cells in the adult. Recently, β-cell dedifferentiation has been shown to be an important contributory mechanism to β-cell failure. In this study, we tie together these two pathways by showing that a network of intracellular TGF-β regulators, smads 7, 2, and 3, control β-cell proliferation after β-cell loss, and specifically, smad7 is necessary for that β-cell proliferation. Importantly, this smad7-mediated proliferation appears to entail passing through a transient, nonpathologic dedifferentiation of β-cells to a pancreatic polypeptide-fold hormone-positive state. TGF-β receptor II appears to be a receptor important for controlling the status of the smad network in β-cells. These studies should help our understanding of properly regulated β-cell replication.
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Affiliation(s)
- Yousef El-Gohary
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Sidhartha Tulachan
- Department of Internal Medicine, St. Elizabeth Health Center, Youngstown, OH
| | - John Wiersch
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
- Department of Surgery, School of Medicine, University of Texas Health Sciences Center at San Antonio, San Antonio, TX
| | - Ping Guo
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Carey Welsh
- Division of Neonatology, Department of Pediatrics, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Krishna Prasadan
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Jose Paredes
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Chiyo Shiota
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Xiangwei Xiao
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
| | - Yoko Wada
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Marilyn Diaz
- Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences/National Institutes of Health, Research Triangle Park, NC
| | - George Gittes
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, Pittsburgh, PA
- Corresponding author: George Gittes,
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