Bone morphogenetic protein signaling promotes morphogenesis of blood vessels, wound epidermis, and actinotrichia during fin regeneration in zebrafish
- Thorimbert, Valentine Department of Biology, University of Fribourg, Switzerland
- König, Désirée Department of Biology, University of Fribourg, Switzerland
- Marro, Jan Department of Biology, University of Fribourg, Switzerland
- Ruggiero, Florence Institut de Génomique Fonctionnelle–École Normale Supérieure de Lyon, France
- Jaźwińska, Anna Department of Biology, University of Fribourg, Switzerland
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06.07.2015
Published in:
- The FASEB Journal. - 2015, p. fj.15–272955
English
Zebrafish fin regeneration involves initial formation of the wound epidermis and the blastema, followed by tissue morphogenesis. The mechanisms coordinating differentiation of distinct tissues of the regenerate are poorly understood. Here, we applied pharmacologic and transgenic approaches to address the role of bone morphogenetic protein (BMP) signaling during fin restoration. To map the BMP transcriptional activity, we analyzed the expression of the evolutionarily conserved direct phospho-Smad1 target gene, id1, and its homologs id2a and id3. This analysis revealed the BMP activity in the distal blastema, wound epidermis, osteoblasts, and blood vessels of the regenerate. Blocking the BMP function with a selective chemical inhibitor of BMP type I receptors, DMH1, suppressed id1 and id3 expression and arrested regeneration after blastema formation. We identified several previously uncharacterized functions of BMP during fin regeneration. Specifically, BMP signaling is required for remodeling of plexus into structured blood vessels in the rapidly growing regenerate. It organizes the wound epithelium by triggering wnt5b expression and promoting Collagen XIV-A deposition into the basement membrane. BMP represents the first known signaling that induces actinotrichia formation in the regenerate. Our data reveal a multifaceted role of BMP for coordinated morphogenesis of distinct tissues during regeneration of a complex vertebrate appendage.—Thorimbert, V., König, D., Marro, J., Ruggiero, F., Jaźwińska, A. Bone morphogenetic protein signaling promotes morphogenesis of blood vessels, wound epidermis, and actinotrichia during fin regeneration in zebrafish.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
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- English
- Classification
- Biological sciences
- License
- License undefined
- Identifiers
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- RERO DOC 257053
- DOI 10.1096/fj.15-272955
- Persistent URL
- https://folia.unifr.ch/unifr/documents/304574
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