Fig. 8

Graphic illustration of this study. Schematic illustration for the function of FXR in regulating osteoblast differentiation. The deficiency of FXR results in increased Thoc6 and RUNX2 is ubiquitinated excessively by Thoc6, followed by lysosomal degradation, consequently suppressing osteoblast differentiation leading to osteoporosis; During FXR sufficient, FXR promotes osteoblast differentiation by suppressing Thoc6 expression and reducing ubiquitination of RUNX2 to help maintain healthy bone homeostasis