Loss-of-function of SHARPIN causes an osteopenic phenotype in mice.

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

Endocrine

journal_title

Endocrine

authors

Xia T,Liang Y,Ma J,Li M,Gong M,Yu X

doi

10.1007/s12020-010-9418-1

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

104-12

issue

2

eissn

1355-008X

issn

1559-0100

journal_volume

39

pub_type

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