Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5892701 | Bone | 2009 | 10 Pages |
Abstract
In agreement with previous reports, the skeletal structure of the HB-GAM knockout mice developed normally. However, a growth retardation of the weight-bearing bones was observed by 2Â months of age, suggesting a link to physical activity. Adult HB-GAM deficient mice were characterized by low bone formation and osteopenia, as well as resistance to immobilization-dependent bone remodeling. HB-GAM was localized around osteocytes and their processes in vivo and furthermore, osteocytic HB-GAM expression was upregulated by mechanical loading in vitro. HB-GAM did not affect on human osteoclast formation or resorption in vitro. Taken together, our results suggest that HB-GAM is an osteocyte-derived factor that could participate in mediating the osteogenic effects of mechanical loading on bone.
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Authors
S. Imai, T.J. Heino, A. Hienola, K. Kurata, K. Büki, Y. Matsusue, H.K. Väänänen, H. Rauvala,