Control of craniofacial development by the collagen receptor, discoidin domain receptor 2
- University of Michigan-Ann Arbor, United States
- The University of Texas Southwestern Medical Center, United States
- University of California, San Diego, United States
- The University of Texas Health Science Center at Houston, United States
- King Saud University, Saudi Arabia
Abstract
Development of the craniofacial skeleton requires interactions between progenitor cells and the collagen-rich extracellular matrix (ECM). The mediators of these interactions are not well-defined. Mutations in the discoidin domain receptor 2 gene (DDR2), which encodes a non-integrin collagen receptor, are associated with human craniofacial abnormalities, such as midface hypoplasia and open fontanels. However, the exact role of this gene in craniofacial morphogenesis is not known. As will be shown, Ddr2-deficient mice exhibit defects in craniofacial bones including impaired calvarial growth and frontal suture formation, cranial base hypoplasia due to aberrant chondrogenesis and delayed ossification at growth plate synchondroses. These defects were associated with abnormal collagen fibril organization, chondrocyte proliferation and polarization. As established by localization and lineage tracing studies, Ddr2 is expressed in progenitor cell-enriched craniofacial regions including sutures and synchondrosis resting zone cartilage, overlapping with GLI1+ cells, and contributing to chondrogenic and osteogenic lineages during skull growth. Tissue-specific knockouts further established the requirement for Ddr2 in GLI+ skeletal progenitors and chondrocytes. These studies establish a cellular basis for regulation of craniofacial morphogenesis by this understudied collagen receptor and suggest that DDR2 is necessary for proper collagen organization, chondrocyte proliferation and orientation.
Data availability
All data generated or analysed during this study are included in the manuscript and source data files
Article and author information
Author details
Renny T Franceschi
Funding
National Institute of Dental and Craniofacial Research (R01DE11723)
- Renny T Franceschi
National Institute of Dental and Craniofacial Research (R21DE029012)
- Renny T Franceschi
National Institute of Dental and Craniofacial Research (R01DE029465)
- Renny T Franceschi
U.S. Department of Defense (PR190899)
- Renny T Franceschi
National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR078324)
- Benjamin Levi
National Institute of Arthritis and Musculoskeletal and Skin Diseases (P30AR069620)
- Renny T Franceschi
Ministry of Higher Education and Scientific Research
- Fatma F Mohamed
King Saud University
- Abdul-Aziz Binrayes
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: This study was performed in strict compliance with the Guidelines for the Care and Use of Animals for Scientific Research. All of the animals were handled according to approved institutional animal care and use committee (IACUC) protocols (PRO9305, PRO10975) of the University of Michigan.
Copyright
© 2023, Mohamed et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Control of craniofacial development by the collagen receptor, discoidin domain receptor 2
eLife 12:e77257.
https://doi.org/10.7554/eLife.77257
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