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Stanniocalcin 1 Acts as a Paracrine Regulator of Growth Plate Chondrogenesis
Journal article   Open access   Peer reviewed

Stanniocalcin 1 Acts as a Paracrine Regulator of Growth Plate Chondrogenesis

Shufang Wu, Yuji Yoshiko, Francesco De Luca and Francesco DeLuca
The Journal of biological chemistry, v 281(8), pp 5120-5127
24 Feb 2006
DOI: https://doi.org/10.1074/jbc.M506667200
PMID: 16377640
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.1074/jbc.m506667200View
Published, Version of Record (VoR)CC BY V4.0,  Open
url
https://doi.org/10.1074/jbc.M506667200View
Published, Version of Record (VoR) Open

Abstract

During embryogenesis, the expression of mammalian stanniocalcin (STC1) in the appendicular skeleton suggests its involvement in the regulation of longitudinal bone growth. Such a role is further supported by the presence of dwarfism in mice overexpressing STC1. Yet, the STC 1 inhibitory effect on growth may be related to both postnatal metabolic abnormalities and prenatal defective bone formation. In our study, we used an organ culture system to evaluate the effects of STC on growth plate chondrogenesis, which is the primary determinant of longitudinal bone growth. Fetal rat metatarsal bones were cultured in the presence of recombinant human STC (rhSTC). After 3 days, rhSTC suppressed metatarsal growth, growth plate chondrocyte proliferation and hypertrophy/differentiation, and extracellular matrix synthesis. In addition, rhSTC increased the number of apoptotic chondrocytes in the growth plate. In cultured chondrocytes, rhSTC increased phosphate uptake, reduced chondrocyte proliferation and matrix synthesis, and induced apoptosis. All these effects were reversed by culturing chondrocytes with rhSTC and phosphonoformic acid, an inhibitor of phosphate transport. The rhSTC-mediated inhibition of metatarsal growth and growth plate chondrocyte proliferation and hypertrophy/differentiation was abolished by culturing metatarsals with rhSTC and phosphonoformic acid. Taken together, our findings indicate that STC1 inhibits longitudinal bone growth directly at the growth plate. Such growth inhibition, likely mediated by an increased chondrocyte phosphate uptake, results from suppressed chondrocyte proliferation, hypertrophy/differentiation, and matrix synthesis and by increased apoptosis. Last, the expression of both STC1 and its binding site in the growth plate would support an autocrine/paracrine role for this growth factor in the regulation of growth plate chondrogenesis.

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Domestic collaboration
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Web of Science research areas
Biochemistry & Molecular Biology
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