Author(s): Mitsui Y, Gotoh M, Fukushima N, Shirachi I, Otabe S,
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Abstract BACKGROUND: There is growing evidence that adiponectin, a physiologically active polypeptide secreted by adipocytes, controls not only adipose tissue but also bone metabolism. However, a role for adiponectin in bone development remains controversial. METHODS: We therefore investigated the endocrine effects of adiponectin on bone metabolism using 12-week-old male transgenic (Ad-Tg) mice with significant hyperadiponectinemia overexpressing human full-length adiponectin in the liver. RESULTS: In Ad-Tg mice, the serum level of osteocalcin was significantly increased, but the levels of RANKL, osteoprotegerin, and TRAP5b were not. Bone mass was significantly greater in Ad-Tg mice with increased bone formation. In contrast, bone resorption parameters including the number of osteoclasts and eroded surface area did not differ between Ad-Tg and their littermates. CONCLUSIONS: These findings demonstrate that hyperadiponectinemia enhances bone formation in mice.
This article was published in BMC Musculoskelet Disord
and referenced in Internal Medicine: Open Access