Petra Celá1,2, Marcela Buchtová1,2,3, Iva Veselá2,4, Kathy Fu3, Jean-Philippe Bogardi5, Yiping Song3, Amanda Barlow5, Paul Buxton5, Jirina Medalová2, Philippa Francis-West5, Joy M Richman3. 1. Department of Experimental Biology, Masaryk University, Brno, Czech Republic. 2. Institute of Animal Physiology and Genetics, v.v.i., Academy of Sciences of the Czech Republic, Brno, Czech Republic. 3. Department of Oral Health Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada. 4. Department of Anatomy, Histology and Embryology, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic. 5. King's College London, Department of Craniofacial Development and Stem Cell Biology, London, United Kingdom.
Abstract
BACKGROUND: Lineage tracing has shown that most of the facial skeleton is derived from cranial neural crest cells. However, the local signals that influence postmigratory, neural crest-derived mesenchyme also play a major role in patterning the skeleton. Here, we study the role of BMP signaling in regulating the fate of chondro-osteoprogenitor cells in the face. RESULTS: A single Noggin-soaked bead inserted into stage 15 chicken embryos induced an ectopic cartilage resembling the interorbital septum within the palate and other midline structures. In contrast, the same treatment in stage 20 embryos caused a loss of bones. The molecular basis for the stage-specific response to Noggin lay in the simultaneous up-regulation of SOX9 and downregulation of RUNX2 in the maxillary mesenchyme, increased cell adhesiveness as shown by N-cadherin induction around the beads and increased RA pathway gene expression. None of these changes were observed in stage 20 embryos. CONCLUSIONS: These experiments demonstrate how slight changes in expression of growth factors such as BMPs could lead to gain or loss of cartilage in the upper jaw during vertebrate evolution. In addition, BMPs have at least two roles: one in patterning the skull and another in regulating the skeletogenic fates of neural crest-derived mesenchyme. Developmental Dynamics 245:947-962, 2016.
BACKGROUND: Lineage tracing has shown that most of the facial skeleton is derived from cranial neural crest cells. However, the local signals that influence postmigratory, neural crest-derived mesenchyme also play a major role in patterning the skeleton. Here, we study the role of BMP signaling in regulating the fate of chondro-osteoprogenitor cells in the face. RESULTS: A single Noggin-soaked bead inserted into stage 15 chicken embryos induced an ectopic cartilage resembling the interorbital septum within the palate and other midline structures. In contrast, the same treatment in stage 20 embryos caused a loss of bones. The molecular basis for the stage-specific response to Noggin lay in the simultaneous up-regulation of SOX9 and downregulation of RUNX2 in the maxillary mesenchyme, increased cell adhesiveness as shown by N-cadherin induction around the beads and increased RA pathway gene expression. None of these changes were observed in stage 20 embryos. CONCLUSIONS: These experiments demonstrate how slight changes in expression of growth factors such as BMPs could lead to gain or loss of cartilage in the upper jaw during vertebrate evolution. In addition, BMPs have at least two roles: one in patterning the skull and another in regulating the skeletogenic fates of neural crest-derived mesenchyme. Developmental Dynamics 245:947-962, 2016.
Authors: Adrian Danescu; Elisabeth G Rens; Jaspreet Rehki; Johnathan Woo; Takashi Akazawa; Katherine Fu; Leah Edelstein-Keshet; Joy M Richman Journal: Development Date: 2021-05-07 Impact factor: 6.868
Authors: Petra Cela; Marek Hampl; Katherine K Fu; Michaela Kunova Bosakova; Pavel Krejci; Joy M Richman; Marcela Buchtova Journal: Front Physiol Date: 2016-08-31 Impact factor: 4.566