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Coelomic expression of a novel bone morphogenetic protein in regenerating arms of the brittle star Amphiura filiformis

Abstract

The bone morphogenetic proteins (BMPs) are a family of signalling molecules involved in numerous developmental processes including cell fate determination in embryonic ectoderm of vertebrate and invertebrate species. Recently, published evidence has indicated that BMPs are involved in echinoderm adult tissue regeneration. We have cloned a novel member of the BMP2/4 subfamily from the ophiuroid echinoderm Amphiura filiformis, which we have named afBMP2/4. Whole-mount in-situ hybridisation performed on non-regenerating brittle star arms revealed that expression of afBMP2/4 is localised to the radial water canal (RWC) and that this expression is upregulated at segmental intervals along the arm. This observed expression pattern suggests a putative active role for this echinoderm BMP transcript in somatic growth and maintenance of the brittle star arm. Expression of this factor has also been observed in regenerating arms 2 weeks post-ablation, implicating the RWC as a source of cells for ophiuroid arm regeneration.

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Acknowledgements

We thank the staff at Kristineberg marine research Station for support during this work. R.B and M. C. T also acknowledge the support of the EU Transnational Access to Infrastructures programme, and VR (Sweden) as well as the Network of Excellence “Marine Genomics Europe” (GOCE-04-505403) for work conducted at Kristineberg marine research Station. We would also like to thank Patricia Goggin at the Electron Microscopy Unit, Royal Holloway, University of London, for assistance with preparation of resin sections. This work was funded by a NERC studentship.

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Correspondence to Philip W. Beesley.

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Communicated by M.Q. Martindale

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Bannister, R., McGonnell, I.M., Graham, A. et al. Coelomic expression of a novel bone morphogenetic protein in regenerating arms of the brittle star Amphiura filiformis . Dev Genes Evol 218, 33 (2008). https://doi.org/10.1007/s00427-007-0193-9

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  • DOI: https://doi.org/10.1007/s00427-007-0193-9

Keywords

  • Amphiura filiformis
  • Bone morphogenetic protein
  • Coelom
  • Echinoderm
  • Regeneration