Ipriflavone (Osteofix) (Synonyms: 7-Isopropoxyisoflavone)

Cell experiment:

Ipriflavone is dissolved in absolute ethanol and added to the medium at 1-50 μM. The final ethanol concentrations are <0.5% (v/v). MDA-231 cells are seeded in 35 mm culture dishes in DMEM supplemented with 10% FBS in the presence of ipriflavone (1, 10 or 50 μM) or ethanol. After 48 hr incubation, the medium is changed with fresh medium containing the same concentrations of ipriflavone or ethanol. After incubation for 24, 48, 72 and 96 hr from the initial seeding, cells are treated with trypan blue to estimate the number of viable cells[1].

Animal experiment:

Rats: To assess the potential impact of ipriflavone on the biomechanical properties and mineral composition of bone, adult male rats are orally administered two doses (200 or 400 mg/kg bw) of ipriflavone for 1 month. Bone biomechanics are evaluated by vibration damping, an index of strain energy loss, and impact strength[3]. Mice: Ipriflavone is suspended in water containing 0.5% (w/v) methylcellulose and given to mice orally at 6 or 12 mg/0.2 mL daily, which is equivalent to 200 or 400 mg/kg body weight. MDA-231 cells are injected s.c. into the interscapular space of nude mice (on day 0), which are then given ipriflavone (6 or 12 mg/mouse) or the methylcellulose solution orally from day 1 to day 27. Tumor growth is analyzed twice a week by measuring the tumor volume[1].

References:

[1]. Iisaki T, et al. Ipriflavone inhibits osteolytic bone metastasis of human breast cancer cells in a nude mouse model. Int J Cancer. 2002 Aug 1;100(4):381-7.
[2]. Hagiwara H, et al. Ipriflavone down-regulates endothelin receptor levels during differentiation of rat calvarial osteoblast-like cells. J Biochem. 1999 Jul;126(1):168-73.
[3]. Civitelli R, et al. Ipriflavone improves bone density and biomechanical properties of adult male rat bones. Calcif Tissue Int. 1995 Mar;56(3):215-9.