PT  - JOURNAL ARTICLE
AU  - Sehee Choi
AU  - Hyun-Yi Kim
AU  - Pu-Hyeon Cha
AU  - Seol Hwa Seo
AU  - Chulho Lee
AU  - Yejoo Choi
AU  - Wookjin Shin
AU  - Yunseok Heo
AU  - Gyoonhee Han
AU  - Weontae Lee
AU  - Kang-Yell Choi
TI  - CXXC5 mediates growth plate senescence and is a target for enhancement of longitudinal bone growth
AID  - 10.26508/lsa.201800254
DP  - 2019 Apr 01
TA  - Life Science Alliance
PG  - e201800254
VI  - 2
IP  - 2
4099  - https://www.life-science-alliance.org/content/2/2/e201800254.short
4100  - https://www.life-science-alliance.org/content/2/2/e201800254.full
SO  - Life Sci. Alliance2019 Apr 01; 2
AB  - Longitudinal bone growth ceases with growth plate senescence during puberty. However, the molecular mechanisms of this phenomenon are largely unexplored. Here, we examined Wnt-responsive genes before and after growth plate senescence and found that CXXC finger protein 5 (CXXC5), a negative regulator of the Wnt/β-catenin pathway, was gradually elevated with reduction of Wnt/β-catenin signaling during senescent changes of rodent growth plate. Cxxc5−/− mice demonstrated delayed growth plate senescence and tibial elongation. As CXXC5 functions by interacting with dishevelled (DVL), we sought to identify small molecules capable of disrupting this interaction. In vitro screening assay monitoring CXXC5–DVL interaction revealed that several indirubin analogs were effective antagonists of this interaction. A functionally improved indirubin derivative, KY19382, elongated tibial length through delayed senescence and further activation of the growth plate in adolescent mice. Collectively, our findings reveal an important role for CXXC5 as a suppressor of longitudinal bone growth involving growth plate activity.