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2021-01-01 - Article/Dans un journal sans peer-review - Anglais - 63 page(s) (Soumise)

Tinoco Ana B., Barreiro-Iglesias Anton, Alfonso Yanez Guerra Luis, Delroisse Jérôme , Zhang Ya, Gunner Elizabeth F., Zampronio Cleidiane, Jones Alexandra M., Egertova Michaela, Elphick Maurice R., "Evolutionarily ancient role of cholecystokinin-type neuropeptide signalling as an inhibitory regulator of feeding-related processes revealed in an echinoderm" in eLife

  • Edition : eLife Sciences Publications (United Kingdom)
  • Codes CREF : Biologie moléculaire (DI3111), Biologie (DI3100), Sciences exactes et naturelles (DI1000), Ecologie (DI3123), Zoologie générale (DI3160)
  • Unités de recherche UMONS : Biologie des Organismes Marins et Biomimétisme (S864)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
  • Centres UMONS : Biosys (BIOSYS)
Texte intégral :

Abstract(s) :

(Anglais) Cholecystokinin (CCK) / sulfakinin (SK)-type neuropeptides regulate feeding and 37 digestion in chordates and protostomes (e.g. insects). Here we characterised CCK/SK-type 38 signalling for the first time in a non-chordate deuterostome - the starfish Asterias rubens 39 (phylum Echinodermata). In this species, two neuropeptides (ArCCK1, ArCCK2) derived from 40 the precursor protein ArCCKP act as ligands for a CCK/SK-type receptor (ArCCKR) and are 41 expressed in the nervous system, digestive system, tube feet and body wall. Furthermore, 42 ArCCK1 and ArCCK2 cause dose-dependent contraction of cardiac stomach, tube foot and 43 body wall apical muscle preparations in vitro and injection of these neuropeptides in vivo 44 triggers cardiac stomach retraction and inhibition of the onset of feeding in A. rubens. Thus, an 45 evolutionarily ancient role of CCK/SK-type neuropeptides as inhibitory regulators of feeding- 46 related processes in the Bilateria has been conserved in the unusual and unique context of the 47 extra-oral feeding behaviour and pentaradial body plan of an echinoderm.