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Wang F, Li R, Zhang L, Nie X, Wang L, Chen L. Cell Transdifferentiation: A Challenging Strategy with Great Potential. Cell Reprogram 2023; 25:154-161. [PMID: 37471050 DOI: 10.1089/cell.2023.0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023] Open
Abstract
With the discovery and development of somatic cell nuclear transfer, cell fusion, and induced pluripotent stem cells, cell transdifferentiation research has presented unique advantages and stimulated a heated discussion worldwide. Cell transdifferentiation is a phenomenon by which a cell changes its lineage and acquires the phenotype of other cell types when exposed to certain conditions. Indeed, many adult stem cells and differentiated cells were reported to change their phenotype and transform into other lineages. This article reviews the differentiation of stem cells and classification of transdifferentiation, as well as the advantages, challenges, and prospects of cell transdifferentiation. This review discusses new research directions and the main challenges in the use of transdifferentiation in human cells and molecular replacement therapy. Overall, such knowledge is expected to provide a deep understanding of cell fate and regulation, which can change through differentiation, dedifferentiation, and transdifferentiation, with multiple applications.
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Affiliation(s)
- Fuping Wang
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
- School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China
| | - Runting Li
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
| | - Limeng Zhang
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
| | - Xiaoning Nie
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
| | - Linqing Wang
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
| | - Longxin Chen
- Molecular Biology Laboratory, Zhengzhou Normal University, Zhengzhou China
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Weivoda MM, Bradley EW. Macrophages and Bone Remodeling. J Bone Miner Res 2023; 38:359-369. [PMID: 36651575 PMCID: PMC10023335 DOI: 10.1002/jbmr.4773] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/19/2023]
Abstract
Bone remodeling in the adult skeleton facilitates the removal and replacement of damaged and old bone to maintain bone quality. Tight coordination of bone resorption and bone formation during remodeling crucially maintains skeletal mass. Increasing evidence suggests that many cell types beyond osteoclasts and osteoblasts support bone remodeling, including macrophages and other myeloid lineage cells. Herein, we discuss the origin and functions for macrophages in the bone microenvironment, tissue resident macrophages, osteomacs, as well as newly identified osteomorphs that result from osteoclast fission. We also touch on the role of macrophages during inflammatory bone resorption. © 2023 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
| | - Elizabeth W. Bradley
- Department of Orthopedics and Stem Cell Institute, University of Minnesota, Minneapolis, MN
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Gavin KM, Sullivan TM, Maltzahn JK, Jackman MR, Libby AE, MacLean PS, Kohrt WM, Majka SM, Klemm DJ. Hematopoietic Stem Cell-Derived Adipocytes Modulate Adipose Tissue Cellularity, Leptin Production and Insulin Responsiveness in Female Mice. Front Endocrinol (Lausanne) 2022; 13:844877. [PMID: 35721743 PMCID: PMC9203959 DOI: 10.3389/fendo.2022.844877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 04/07/2022] [Indexed: 11/13/2022] Open
Abstract
A subpopulation of adipocytes in the major adipose depots of mice is produced from hematopoietic stem cells rather than mesenchymal progenitors that are the source of conventional white and brown/beige adipocytes. To analyze the impact of hematopoietic stem cell-derived adipocytes (HSCDAs) in the adipose niche we transplanted HSCs in which expression of a diphtheria toxin gene was under the control of the adipocyte-specific adiponectin gene promoter into irradiated wild type recipients. Thus, only adipocytes produced from HSC would be ablated while conventional white and brown adipocytes produced from mesenchymal progenitor cells would be spared. Wild type mice transplanted with HSCs from mice containing a reporter gene, but not the diphtheria toxin gene, regulated by the adiponectin gene promoter served as controls. In mice in which HSCDA production was suppressed, adipocyte size declined while adipose depot weights were unchanged and the number of conventional adipocyte progenitors significantly increased. We also measured a paradoxical increase in circulating leptin levels while physical activity was significantly decreased in the HSCDA depleted mice. Finally, insulin sensitivity was significantly reduced in HSCDA depleted mice. In contrast, loss of HSCDA production had no effect on body weight, components of energy balance, or levels of several circulating adipokines and tissue-resident inflammatory cells. These data indicate that ablation of this low-abundance subpopulation of adipocytes is associated with changes in circulating leptin levels and leptin-regulated endpoints associated with adipose tissue function. How they do so remains a mystery, but our results highlight the need for additional studies to explore the role of HSCDAs in other physiologic contexts such as obesity, metabolic dysfunction or loss of sex hormone production.
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Affiliation(s)
- Kathleen M. Gavin
- Geriatric Research, Education and Clinical Center, Rocky Mountain Regional Veterans Administration (VA) Medical Center, Aurora, CO, United States
- Division of Geriatric Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Timothy M. Sullivan
- Cardiovascular Pulmonary Research Laboratory, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Joanne K. Maltzahn
- Cardiovascular Pulmonary Research Laboratory, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Matthew R. Jackman
- Division of Endocrinology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Andrew E. Libby
- Division of Endocrinology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Paul S. MacLean
- Division of Endocrinology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Wendy M. Kohrt
- Geriatric Research, Education and Clinical Center, Rocky Mountain Regional Veterans Administration (VA) Medical Center, Aurora, CO, United States
- Division of Geriatric Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Susan M. Majka
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Biomedical Research, National Jewish Health, Denver, CO, United States
- Charles C. Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Dwight J. Klemm
- Geriatric Research, Education and Clinical Center, Rocky Mountain Regional Veterans Administration (VA) Medical Center, Aurora, CO, United States
- Cardiovascular Pulmonary Research Laboratory, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
- Charles C. Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
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Osaki J, Yamazaki S, Hikita A, Hoshi K. Hematopoietic progenitor cells specifically induce a unique immune response in dental pulp under conditions of systemic inflammation. Heliyon 2022; 8:e08904. [PMID: 35198771 PMCID: PMC8842015 DOI: 10.1016/j.heliyon.2022.e08904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/15/2021] [Accepted: 02/02/2022] [Indexed: 11/08/2022] Open
Abstract
Teeth are exposed to various stimuli, including bacterial, thermal, and physical stimuli. Therefore, immune cells present in the normal dental pulp and the immune response to these stimuli have been studied. However, the relationship between systemic inflammation, such as that induced by viral infection, and changes occurring in dental pulp is not well known. This study aimed to investigate the immunological and hematological responses to systemic inflammation in dental pulp. Poly(I:C), a toll-like receptor 3 agonist, was injected into mice every two days to simulate a systemic inflammatory state in which type I interferon (IFN–I) was produced. The untreated normal state was defined as a steady state, and the states of acute and chronic inflammation were defined according to the period of administration. Changes in the abundance and dynamics of hematopoietic and immune cells in dental pulp, bone marrow and peripheral blood were quantitatively investigated in the steady state and under conditions of inflammation induced by IFN-l. We found that dental pulp in the steady state contained only a few hematopoietic cells, but a greater variety of immune cells than previously reported. B cells were also found in the steady state. An increase in multipotent progenitor cell levels was observed in the dental pulp during both acute and chronic inflammation. The increased multipotent progenitor cells in the dental pulp during acute inflammation tended to differentiate into the myeloid lineage. On the other hand, there was an influx of B cells into the dental pulp during chronic inflammation. These results revealed that a unique immune response is induced in the dental pulp by systemic inflammation, which would lead to a significant change in the perspective of dentists on the utility of dental pulp in the management of systemic diseases.
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Affiliation(s)
- Julia Osaki
- Department of Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Satoshi Yamazaki
- Division of Stem Cell Biology, Center for Stem Cell Therapy, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan, 4-6-1 Shirokane-dai, Minato-ku, Tokyo, 108-8639, Japan.,Laboratory of Stem Cell Therapy, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Atsuhiko Hikita
- Department of Tissue Engineering, The University of Tokyo Hospital, Tokyo, Japan, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kazuto Hoshi
- Department of Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.,Department of Tissue Engineering, The University of Tokyo Hospital, Tokyo, Japan, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.,Department of Oral-maxillofacial Surgery, Dentistry and Orthodontics, The University of Tokyo Hospital, Tokyo, Japan, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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