N-Desmethyltamoxifen hydrochloride is the major metabolite of tamoxifen in humans. N-Desmethyltamoxifen, a poor antiestrogen, is a ten-fold more potent protein kinase C (PKC) inhibitor than Tamoxifen. N-Desmethyltamoxifen hydrochloride is also a potent regulator of ceramide metabolism in human AML cells, limiting ceramide glycosylation, hydrolysis, and sphingosine phosphorylation.
Room temperature in continental US; may vary elsewhere.
Powder -20°C 3 years
In solvent -80°C 6 months
-20°C 1 month
N-desmethyltamoxifen hydrochloride (20-500 ng/ml; 48 hours) has a profound inhibitory effect upon all seven glioma lines (T98G, U87, U138, U373, ALW, AUK, CAS cells).
N-desmethyltamoxifen hydrochloride (1.5-10 μM; 114 hours) inhibits growth of MCF 7 human mammary carcinoma cells.
N-desmethyltamoxifen hydrochloride, resulting from the CYP3A4/5-mediated catalysis of tamoxifen, is the major primary quantitative metabolite of tamoxifen.
- Vertosick FT Jr, et al. A comparison of the relative chemosensitivity of human gliomas to tamoxifen and n-desmethyltamoxifen in vitro. J Neurooncol. 1994;19(2):97-103.
- Morad SA, et al. Modification of sphingolipid metabolism by tamoxifen and N-desmethyltamoxifen in acute myelogenous leukemia--Impact on enzyme activity and response to cytotoxics. Biochim Biophys Acta. 2015 Jul;1851(7):919-28.
- Reddel RR,et al. N-desmethyltamoxifen inhibits growth of MCF 7 human mammary carcinoma cells in vitro. Eur J Cancer Clin Oncol. 1983 Aug;19(8):1179-81.
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