In previous studies conducted by Klasik-Ciszewska et al. [14]
glabridin administered at a dose of 5 mg/kg po shows slightly positive effect on osteoporotically
changed bone tissue in ovariectomized rats. The authors noted, that the diameter of analyzed bones
increased, the reduced area of the transverse cross- sectional of the marrow cavity, the width of
the trabeculae increased and the epiphyseal cartilage decreased.
In the research on murine osteoblast cells MC3T3-E1, glabridin enhanced function of these
osteoblasts cell line. The inhibition of PGE2 and NO production, as well as prevention of
osteoblasts
apoptosis induced by TNF-a were observed. This favorable effect of
glabridin could be ER mediated, associated with cellular protection against oxidative stress. This
flavonoid also intensified the expression of the osteoblastic differentiation genes. It also
increased the expression of the genes for factors determining osteoblasts growth and
remaining—phosphatidylinositol-30kinase (PI3 K) and protein kinase B2 (AKT2) [22–24]. Moreover,
research of Kim et al. indicates that glabridin inhibits RANKL induced osteoclastogenesis in murine
macrophages [25]. In studies on human female osteoblasts glabridin promoted the production of
1,25(OH)2D3, what in result effected in enhanced sensitivity of cells
to estradiol [26].