Filamin B represses chondrocyte hypertrophy in a Runx2/Smad3-dependent manner.
Filamin B represses chondrocyte hypertrophy in a Runx2/Smad3-dependent manner.
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DOI:
10.1083/jcb.200703113
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发表时间:
2007-07-02
期刊:
影响因子:
--
通讯作者:
Justice MJ
中科院分区:
文献类型:
--
作者:
Zheng L;Baek HJ;Karsenty G;Justice MJ
FILAMIN B, which encodes a cytoplasmic actin binding protein, is mutated in several skeletal dysplasias. To further investigate how an actin binding protein influences skeletogenesis, we generated mice lacking intact Filamin B. As observed in spondylocarpotarsal synostosis syndrome patients, Filamin B mutant mice display ectopic mineralization in many cartilaginous elements. This aberrant mineralization is due to ectopic chondrocyte hypertrophy similar to that seen in mice expressing Runx2 in chondrocytes. Accordingly, removing one copy of Runx2 rescues the Filamin B mutant phenotype, indicating that Filamin B is a regulator of Runx2 function during chondrocyte differentiation. Filamin B binds Smad3, which is known to interact with Runx2. Smad3 phosphorylation is increased in the mutant mice. Thus, Filamin B inhibits Runx2 activity, at least in part, through the Smad3 pathway. Our results uncover the involvement of actin binding proteins during chondrogenesis and provide a molecular basis to a human genetic disease.
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DOI:
10.1083/jcb.153.1.35
发表时间:
2001-04-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Yang X;Chen L;Xu X;Li C;Huang C;Deng CX
通讯作者:
Deng CX
影响因子:
3.9
作者:
Farrington-Rock, Claire;Firestein, Marc H.;Krakow, Deborah
通讯作者:
Krakow, Deborah
影响因子:
11.8
作者:
Bialek, P;Kern, B;Karsenty, G
通讯作者:
Karsenty, G
影响因子:
30.8
作者:
Krakow, D;Robertson, SP;Cohn, DH
通讯作者:
Cohn, DH
影响因子:
4.8
作者:
Sasaki, A;Masuda, Y;Watanabe, K
通讯作者:
Watanabe, K