Expression of bone morphogenetic proteins in normal human intramembranous and endochondral bones

Bone morphogenetic proteins (BMPs) are growth and differentiation factors that have been purified and widely accepted to be the most important regulators in the processes of bone formation. The aim of this study was to identify the BMPs that are expressed in normal human bone, and to investigate the...

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Bibliographic Details
Published in:International journal of oral and maxillofacial surgery 2006-05, Vol.35 (5), p.444-452
Main Authors: Suttapreyasri, S., Koontongkaew, S., Phongdara, A., Leggat, U.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Bone and Bones - anatomy & histology
Bone and Bones - metabolism
bone morphogenetic protein
Bone Morphogenetic Proteins - biosynthesis
Bone Morphogenetic Proteins - genetics
Cartilage
Cells, Cultured
Connective Tissue
Dentistry
endochondral bone
Gene Expression
homeostasis
Humans
Ilium - metabolism
intramembranous bone
Mandible - metabolism
Medical sciences
Osteoblasts - metabolism
Otorhinolaryngology. Stomatology
Reverse Transcriptase Polymerase Chain Reaction
RNA, Messenger - analysis
semi-quantitative RT-PCR
Statistics, Nonparametric
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Summary:Bone morphogenetic proteins (BMPs) are growth and differentiation factors that have been purified and widely accepted to be the most important regulators in the processes of bone formation. The aim of this study was to identify the BMPs that are expressed in normal human bone, and to investigate the specific pattern of BMP2–BMP9 expression in normal human intramembranous and endochondral bone to maintain homeostasis, as well as in ex vivo primary cell culture of human osteoblasts from intramembranous and endochondral bone. Semi-quantitative RT-PCR indicated that 2 types of bone of different embryological origin have distinct patterns of BMP expression. BMP3, 4, 7 and 8 were strongly expressed in normal intramembranous bone compared to endochondral bone, whereas BMP2 and 5 were highly expressed in endochondral bone. The expression of BMP9 and BMP15 in human bone was identified for the first time. From the very similar expression patterns of BMPs in fresh normal bone and ex vivo osteoblastic cell culture, it can be proposed that the different proportions of BMPs in normal human intramembranous and endochondral bone needed to maintain normal homeostasis.
ISSN:0901-5027
1399-0020
DOI:10.1016/j.ijom.2006.01.021