BAPTA-AM (126150-97-8) is a selective cell permeable Ca2+ chelator. It is a widely used intracellular calcium sponge1,2. Rapidly taken up by cells where it is irreversibly hydrolyzed to BAPTA by intracellular esterases. Pretreatment of cells with BAPTA-AM inhibits thapsigargin-induced responses3.
1) Smith et al. (1992), Cytosolic calcium as a second messanger for collagen-induced platelet responses; Biochem. J., 288 925
2) Yoshida et al. (1993), Role of calcium ion in induction of apoptosis by etoposide in human leukemia HL-60 cells; Biochem. Biophys. Res. Commun., 196 927
3) Jiang et al. (1994), Intracellular Ca2+ signals activate apoptosis in thymocytes: studies using the Ca(2+)-ATPase inhibitor thapsigargin; Exp. Cell Res., 212 84