Open AccessCharacterization of bone morphology in CCN5/WISP5 knockout mice
Author(s) -
Jiang Jie,
Zhao Gexin,
Lyons Karen M.
Publication year - 2018
Publication title -
journal of cell communication and signaling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.329
H-Index - 44
eISSN - 1873-961X
pISSN - 1873-9601
DOI - 10.1007/s12079-018-0457-3
Subject(s) - matricellular protein , osteoblast , knockout mouse , microbiology and biotechnology , mechanotransduction , phenotype , bone marrow , conditional gene knockout , bone cell , biology , anatomy , immunology , gene , in vitro , genetics , extracellular matrix
CCN5/WISP2 is part of the CCN family of matricellular proteins, but is distinct in that it lacks the C‐terminal (CT) domain. Although CCN5 has been shown to impact cell proliferation and differentiation in vitro , its role in vivo is unclear. We therefore generated mice using ES cells developed by the Knockout Mouse Project (KOMP) in which exons 2‐5, which encode the all of the conserved protein coding regions, are replaced by a lacZ cassette. Ccn5 LacZ/LacZ mice were viable and apparently normal. Based on previous studies showing that CCN5 impacts osteoblast proliferation and differentiation, we performed an analysis of adult bone phenotype. LacZ expression was examined in adult bone, and was found to be strong within the periosteum, but not in trabecular bone or bone marrow. Micro‐CT analysis revealed no apparent changes in bone mineral density (BMD) or bone tissue volume (BV/TV) in Ccn5 LacZ/LacZ mice. These studies indicate that CCN5 is not required for normal bone formation, but they do not rule out a role in mechanotransduction or repair processes. The availability of Ccn5 LacZ mice enables studies of CCN5 expression and function in multiple tissues.