Journal
CELLULAR PHYSIOLOGY AND BIOCHEMISTRY
Volume 41, Issue 4, Pages 1605-1615Publisher
KARGER
DOI: 10.1159/000470896
Keywords
MC3T3-E1; Icariin; Overload; Wnt/beta-catenin
Categories
Funding
- Major Program of the National Natural Science Foundation of China [11432016]
- National Natural Science Foundation of China [31470935, 31500761]
Ask authors/readers for more resources
Background/Aims: Mechanical loading plays an important role in the regulation of bone mass. However, bone cells are not always under physiological stress. In some cases, bone tissue is subjected to an overloaded mechanical environment. For example, a person who is weight training and a stevedore often experience bone pain, inflammation and other bone fatigue damage symptoms. Icariin is the major ingredient of Herba epimedii, which has been widely used for the treatment of bone injury in traditional Chinese medicine, but its mechanism remains unknown. The aim of this study was to probe the effect of icariin on the proliferation and differentiation of osteoblasts exposed to overload and to determine whether the Wnt/beta-catenin signalling pathway is involved in the drug response in osteoblasts. Methods: Mouse MC3T5-E1 cells were exposed to mechanical tensile strain using a four point bending device to create an overload damage model. An MTT assay was performed to determine the effects of icariin on MC3T3-E1 cell proliferation. The mRNA and protein levels of ALP, COL-I, OCN, RUNX2 and beta-catenin were assessed using RT-PCR and immunoblotting. The protein levels of beta-catenin in the MC3T3-E1 cells were also determined using fluorescence microscopy. The mineralization of osteoblasts was assessed using Alizarin Red S staining. Results: We found that icariin enhanced the proliferation of osteoblasts exposed to overload and promoted MC3T3-E1 cell differentiation and mineralization. Furthermore, the gene and protein expression levels of beta-catenin and RUNX2 all increased with icariin treatment compared with those in the damage group. Conclusion: Our study suggested that icariin promotes proliferation and differentiation in osteoblasts exposed to overload. The effect of icariin on osteoblastic differentiation acted by activating the RUNX2 promoter and the Wnt/p catenin pathway. (C) 2017 The Author(s) Published by S. Karger AG, Basel
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available