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Differentiation and Transdifferentiation of Sponge Cells

  • Maja Adamska
Chapter
Part of the Results and Problems in Cell Differentiation book series (RESULTS, volume 65)

Abstract

Over 100 years of sponge biology research has demonstrated spectacular diversity of cell behaviors during embryonic development, metamorphosis and regeneration. The past two decades have allowed the first glimpses into molecular and cellular mechanisms of these processes. We have learned that while embryonic development of sponges utilizes a conserved set of developmental regulatory genes known from other animals, sponge cell differentiation appears unusually labile. During normal development, and especially as a response to injury, sponge cells appear to have an uncanny ability to transdifferentiate. Here, I argue that sponge cell differentiation plasticity does not preclude homology of cell types and processes between sponges and other animals. Instead, it does provide a wonderful opportunity to better understand transdifferentiation processes in all animals.

Notes

Acknowledgments

Research in my laboratory is currently supported by the Australian Research Council through Future Fellowship (FT160100068) and the Centre of Excellence for Coral Reef Studies (CE140100020) grants. I acknowledge generous past funding from the Sars International Centre for Marine Molecular Biology (Bergen, Norway). I am deeply indebted to past and current members of my laboratories, as well as collaborators and colleagues, for continuous and stimulating discussions on sponge cell biology and evolution of animal body plans. Special thanks to Kathryn Green, Christin Zwafink, and Erika Broberg for the assistance in generating images shown in many of the figures presented in this chapter and to Noriko Funayama and Sacha Ereskovsky for photographs of Ephydatia and Oscarella.

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Authors and Affiliations

  1. 1.Division of Biomedical Science and Biochemistry, Research School of BiologyThe Australian National UniversityCanberraAustralia

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