Send to

Choose Destination
See comment in PubMed Commons below
Dev Biol. 1995 Jul;170(1):243-7.

Anterior duplication of the Sonic hedgehog expression pattern in the pectoral fin buds of zebrafish treated with retinoic acid.

Author information

Loeb Institute for Medical Research, Department of Medicine, University of Ottawa, Ontario, Canada.


The Sonic hedgehog gene has been identified as a candidate for the signal mediating the function of the zone of polarizing activity (ZPA) during limb development in tetrapods. To better understand the early steps of development of paired fin buds in fish, we have analyzed the regulation of the zebrafish Sonic hedgehog gene (shh/vhh-1) in response to retinoic acid. Systemic administration of retinoic acid (RA) to zebrafish embryos during the initial stages of pectoral fin bud development resulted in the induction of ectopic expression of shh/vhh-1 on the anterior margin of the bud under the apical ectodermal ridge and in abnormal pectoral fin bud morphology. RA treatment also resulted in ectopic shh/vhh-1 expression in floor plate cells at the caudal end of the neural keel. These results suggest that the control of ZPA function during the initial stages of development of paired appendages has been conserved between fish and tetrapods.

[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center