Merck, 12758S-1MG, Thapsigargin - CAS 67526-95-8 - Calbiochem

General description
A cell-permeable tumor-promoting sesquiterpene lactone that releases Ca²⁺ by inhibiting endoplasmic reticular Ca²⁺-ATPase (IC₅₀ = 4-13 nM). Does not increase inositol phosphates and has no significant effect on protein kinase C. Increases Ca²⁺-dependent Na⁺ influx in human platelets in a dose-dependent manner. Induces apoptosis in rat thymocytes and in human hepatoma cells. Shown to induce apoptosis in alveolar rhabdomyosarcoma cells by elevating Akt-stimulated PAX3-FOXO1 phosphorylation and promoting its proteasomal degradation.
Biochem/physiol Actions
Cell permeable: yes
Primary Target
endoplasmic reticular Ca²⁺ ATPase
Product does not compete with ATP.
Reversible: no
Target IC₅₀: 4-13 nM against endoplasmic reticular Ca2+-ATPase
Preparation Note
Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for 2-3 months at -20°C.
Other Notes
Jothi, M., et al. 2013. Mol. Cancer Ther. In press.
Won, J.G. and Orth, D.N. 1995. Endocrinology 136, 5399.
Tepel, M., et al. 1994. Biochim. Biophys. Acta1220, 248.
Begum, N., et al. 1993. J. Biol. Chem. 268, 3352.
Low, A.M., et al. 1993. Eur. J. Pharmacol.230, 53.
Tsukamoto, A. and Karneko, Y. 1993. Cell. Biol. Int.17, 969.
Wong, W.L., et al. 1993. Biochem. J.289, 71.
Glennon, M.C., et al. 1992. J. Biol. Chem. 267, 25568.
Xu, Y., et al. 1992. J. Neurochem.59, 2224.
Mason, M.J., et al. 1991. J. Biol. Chem. 266, 20856.
Thastrup, O., et al. 1990. Proc. Natl. Acad. Sci. USA87, 2466.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Irritant (B)