Cnidarians: An evolutionarily conserved model system for regeneration?
Article first published online: 9 JAN 2003
Copyright © 2003 Wiley-Liss, Inc.
Special Issue: Regeneration Special Issue
Volume 226, Issue 2, pages 257–267, February 2003
How to Cite
Holstein, T.W., Hobmayer, E. and Technau, U. (2003), Cnidarians: An evolutionarily conserved model system for regeneration?. Dev. Dyn., 226: 257–267. doi: 10.1002/dvdy.10227
- Issue published online: 28 JAN 2003
- Article first published online: 9 JAN 2003
- Manuscript Accepted: 31 OCT 2002
- Manuscript Received: 17 SEP 2002
- Deutsche Forschungsgemeinschaft
- self organisation;
- wnt/wg signaling
Cnidarians are among the simplest metazoan animals and are well known for their remarkable regeneration capacity. They can regenerate any amputated head or foot, and when dissociated into single cells, even intact animals will regenerate from reaggregates. This extensive regeneration capacity is mediated by epithelial stem cells, and it is based on the restoration of a signaling center, i.e., an organizer. Organizers secrete growth factors that act as long-range regulators in axis formation and cell differentiation. In Hydra, Wnt and TGF-beta/Bmp signaling pathways are transcriptionally up-regulated early during head regeneration and also define the Hydra head organizer created by de novo pattern formation in aggregates. The signaling molecules identified in Cnidarian regeneration also act in early embryogenesis of higher animals. We suppose that they represent a core network of molecular interactions, which could explain at least some of the mechanisms underlying regeneration in vertebrates. Developmental Dynamics 226:257–267, 2003.© 2003 Wiley-Liss, Inc.