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Embryonic expression of priapulid Wnt genes
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
Univ Bergen, Sars Int Ctr Marine Mol Biol, Thormohlensgate 55, N-5006 Bergen, Norway;Max Planck Inst Mol Cell Biol & Genet, Pfotenhauerstr 108, D-01307 Dresden, Germany.ORCID iD: 0000-0002-0000-9465
Univ Bergen, Sars Int Ctr Marine Mol Biol, Thormohlensgate 55, N-5006 Bergen, Norway;Queen Mary Univ London, Sch Biol & Chem Sci, Mile End Rd, London E1 4NS, England.
Univ Bergen, Sars Int Ctr Marine Mol Biol, Thormohlensgate 55, N-5006 Bergen, Norway.
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2019 (English)In: Development, Genes and Evolution, ISSN 0949-944X, E-ISSN 1432-041X, Vol. 229, no 4, p. 125-135Article in journal (Refereed) Published
Abstract [en]

Posterior elongation of the developing embryo is a common feature of animal development. One group of genes that is involved in posterior elongation is represented by the Wnt genes, secreted glycoprotein ligands that signal to specific receptors on neighbouring cells and thereby establish cell-to-cell communication. In segmented animals such as annelids and arthropods, Wnt signalling is also likely involved in segment border formation and regionalisation of the segments. Priapulids represent unsegmented worms that are distantly related to arthropods. Despite their interesting phylogenetic position and their importance for the understanding of ecdysozoan evolution, priapulids still represent a highly underinvestigated group of animals. Here, we study the embryonic expression patterns of the complete sets of Wnt genes in the priapulids Priapulus caudatus and Halicryptus spinulosus. We find that both priapulids possess a complete set of 12 Wnt genes. At least in Priapulus, most of these genes are expressed in and around the posterior-located blastopore and thus likely play a role in posterior elongation. Together with previous work on the expression of other genetic factors such as caudal and even-skipped, this suggests that posterior elongation in priapulids is under control of the same (or very similar) conserved gene regulatory network as in arthropods.

Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 229, no 4, p. 125-135
Keywords [en]
Ecdysozoan ancestor, Wnt signalling, Evolution, Penis worm, Posterior elongation
National Category
Developmental Biology
Identifiers
URN: urn:nbn:se:uu:diva-391026DOI: 10.1007/s00427-019-00636-6ISI: 000475624600003PubMedID: 31273439OAI: oai:DiVA.org:uu-391026DiVA, id: diva2:1343740
Funder
Swedish Research Council, 621-2011-4703Available from: 2019-08-19 Created: 2019-08-19 Last updated: 2019-08-19Bibliographically approved

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