Abstract:
:SHARPIN is a novel protein thought to interact with SHANK family and is widely expressed in multiple tissues/cells, including osteoblasts and osteoclasts. Loss-of-function of Sharpin develops the chronic proliferative dermatitis mutation (CPDM) in mice as well as a severe inflammation in other organs. The actual function of SHARPIN is poorly understood. Our aim was to determine the functional roles of SHARPIN in bone metabolism by using CPDM mice. The skeletal phenotypes were determined by peripheral quantitative computed tomography, micro-computed tomography, and quantitative real-time RT-PCR, the cellular functions of osteoblasts and osteoclasts were investigated by ex vivo cell culture. Compared to wild-type controls, CPDM mice demonstrated significantly lower total and cortical bone mineral content and bone mineral density, trabecular and cortical bone volume, and trabecular number. The mRNA expression of Runx2, osterix, type I collagen, and osteocalcin was significantly lower in the bone from CPDM mice. Osteoclasts and osteoblasts from CPDM mice were functionally defective. Our result suggests that SHARPIN plays important regulating roles in bone metabolism. These functional roles may either come from systemic chronic inflammatory or directly signaling pathway within bone cells.
journal_name
Endocrinejournal_title
Endocrineauthors
Xia T,Liang Y,Ma J,Li M,Gong M,Yu Xdoi
10.1007/s12020-010-9418-1subject
Has Abstractpub_date
2011-04-01 00:00:00pages
104-12issue
2eissn
1355-008Xissn
1559-0100journal_volume
39pub_type
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