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J. Cell Biol.,
Volume 144, Number 1, January 11, 1999 161-173





* Craniofacial Developmental Biology and Regeneration Branch, Cartilage provides the template for endochondral ossification and is crucial for determining the
length and width of the skeleton. Transgenic mice with
targeted expression of recombinant cartilage-derived morphogenetic protein-1 (CDMP-1), a member of the
bone morphogenetic protein family, were created to investigate the role of CDMP-1 in skeletal formation.
The mice exhibited chondrodysplasia with expanded
cartilage, which consists of the enlarged hypertrophic zone and the reduced proliferating chondrocyte zone.
Histologically, CDMP-1 increased the number of chondroprogenitor cells and accelerated chondrocyte differentiation to hypertrophy. Expression of CDMP-1 in the
notochord inhibited vertebral body formation by blocking migration of sclerotome cells to the notochord.
These results indicate that CDMP-1 antagonizes the
ventralization signals from the notochord. Our study
suggests a molecular mechanism by which CDMP-1
regulates the formation, growth, and differentiation of the skeletal elements.
Craniofacial and Skeletal Diseases Branch, National Institute
of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892;
Department of Orthopaedic
Surgery, Osaka University Medical School, Suita 565-0871, Japan; and § Department of Orthopaedic Surgery, Toyama Medical
and Pharmaceutical University, Toyama 930-0194, Japan
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