Sodium etidronate

A diphosphonate which affects calcium metabolism. It inhibits ectopic calcification and slows down bone resorption and bone turnover. (In Vitro) :Etidronic acid (Etidronate) (10 mM, 24 h) disodium shows cytotoxicity, causes a decrease in the S-phase population and an increase in the G2/M population, induces p53 mutation in MCF-7 cells.Etidronic acid (100 nM, 24 h) disodium induces osteoclast apoptosis, which displays characteristics of apoptosis, including chromatin condensation and changed cellular and nuclear morphology, detected by fluorescence microscopy.