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Ereskovsky AV, Tokina DB, Saidov DM, Baghdiguian S, Le Goff E, Lavrov AI. Transdifferentiation and mesenchymal-to-epithelial transition during regeneration in Demospongiae (Porifera). J Exp Zool B Mol Dev Evol 2019; 334:37-58. [PMID: 31725194 DOI: 10.1002/jez.b.22919] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 10/15/2019] [Accepted: 10/25/2019] [Indexed: 12/18/2022]
Abstract
Origin and early evolution of regeneration mechanisms remain among the most pressing questions in animal regeneration biology. Porifera have exceptional regenerative capacities and, as early Metazoan lineage, are a promising model for studying evolutionary aspects of regeneration. Here, we focus on reparative regeneration of the body wall in the Mediterranean demosponge Aplysina cavernicola. The epithelialization of the wound surface is completed within 2 days, and the wound is completely healed within 2 weeks. The regeneration is accompanied with the formation of a mass of undifferentiated cells (blastema), which consists of archaeocytes, dedifferentiated choanocytes, anucleated amoebocytes, and differentiated spherulous cells. The main mechanisms of A. cavernicola regeneration are cell dedifferentiation with active migration and subsequent redifferentiation or transdifferentiation of polypotent cells through the mesenchymal-to-epithelial transformation. The main cell sources of the regeneration are archaeocytes and choanocytes. At early stages of the regeneration, the blastema almost devoid of cell proliferation, but after 24 hr postoperation (hpo) and up to 72 hpo numerous DNA-synthesizing cells appear there. In contrast to intact tissues, where vast majority of DNA-synthesizing cells are choanocytes, all 5-ethynyl-2'-deoxyuridine-labeled cells in the blastema are mesohyl cells. Intact tissues, distant from the wound, retains intact level of cell proliferation during whole regeneration process. For the first time, the apoptosis was studied during the regeneration of sponges. Two waves of apoptosis were detected during A. cavernicola regeneration: The first wave at 6-12 hpo and the second wave at 48-72 hpo.
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Affiliation(s)
- Alexander V Ereskovsky
- Institut Méditerranéen de Biodiversité et d'Ecologie Marine et Continentale (IMBE), Aix Marseille University, CNRS, IRD, Station Marine d'Endoume, Rue de la Batterie des Lions, Avignon University, Marseille, France.,Department of Embryology, Faculty of Biology, Saint-Petersburg State University, Saint-Petersburg, Russia.,Evolution of Morphogenesis Laboratory, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Daria B Tokina
- Institut Méditerranéen de Biodiversité et d'Ecologie Marine et Continentale (IMBE), Aix Marseille University, CNRS, IRD, Station Marine d'Endoume, Rue de la Batterie des Lions, Avignon University, Marseille, France
| | - Danial M Saidov
- Department of Invertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russia
| | | | - Emilie Le Goff
- ISEM, CNRS, EPHE, IRD, Université de Montpellier, Montpellier, France
| | - Andrey I Lavrov
- Department of Embryology, Faculty of Biology, Saint-Petersburg State University, Saint-Petersburg, Russia.,Pertsov White Sea Biological Station, Biological Faculty, Lomonosov Moscow State University, Moscow, Russia
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Kaverina NV, Eng DG, Largent AD, Daehn I, Chang A, Gross KW, Pippin JW, Hohenstein P, Shankland SJ. WT1 Is Necessary for the Proliferation and Migration of Cells of Renin Lineage Following Kidney Podocyte Depletion. Stem Cell Reports 2017; 9:1152-1166. [PMID: 28966119 PMCID: PMC5639431 DOI: 10.1016/j.stemcr.2017.08.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 08/25/2017] [Accepted: 08/28/2017] [Indexed: 12/17/2022] Open
Abstract
Wilms' tumor suppressor 1 (WT1) plays an important role in cell proliferation and mesenchymal-epithelial balance in normal development and disease. Here, we show that following podocyte depletion in three experimental models, and in patients with focal segmental glomerulosclerosis (FSGS) and membranous nephropathy, WT1 increased significantly in cells of renin lineage (CoRL). In an animal model of FSGS in RenWt1fl/fl reporter mice with inducible deletion of WT1 in CoRL, CoRL proliferation and migration to the glomerulus was reduced, and glomerular disease was worse compared with wild-type mice. To become podocytes, CoRL undergo mesenchymal-to-epithelial transformation (MET), typified by reduced staining for mesenchymal markers (MYH11, SM22, αSMA) and de novo expression of epithelial markers (E-cadherin and cytokeratin18). Evidence for changes in MET markers was barely detected in RenWt1fl/fl mice. Our results show that following podocyte depletion, WT1 plays essential roles in CoRL proliferation and migration toward an adult podocyte fate.
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Affiliation(s)
- Natalya V Kaverina
- Division of Nephrology, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA
| | - Diana G Eng
- Division of Nephrology, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA
| | - Andrea D Largent
- Division of Nephrology, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA
| | - Ilse Daehn
- Department of Medicine, Division of Nephrology, The Icahn School of Medicine at Mount Sinai, 1468 Madison Avenue, New York, NY 10029, USA
| | - Anthony Chang
- Department of Pathology, University of Chicago, 5841 S Maryland Ave, Chicago, IL 60637, USA
| | - Kenneth W Gross
- Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Elm & Carlton Streets, Buffalo, NY 14263, USA
| | - Jeffrey W Pippin
- Division of Nephrology, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA
| | - Peter Hohenstein
- The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK
| | - Stuart J Shankland
- Division of Nephrology, University of Washington School of Medicine, 750 Republican Street, Seattle, WA 98109, USA.
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