Digitoxigenin

Digitoxigenin (CAS No.: 143-62-4) is a naturally occurring cardenolide and the aglycone of the cardiac glycoside digitoxin, originally derived from the foxglove plant Digitalis purpurea, and is widely utilized as a biochemical reagent in cardiovascular and cancer-related research. As a prototypical Na?/K?-ATPase inhibitor, Digitoxigenin binds to the digitalis receptor site on the enzyme with high affinity, leading to increased intracellular sodium levels, secondary elevation of intracellular calcium via the sodium-calcium exchanger, and consequent enhancement of cardiac contractility, while also modulating downstream signaling pathways associated with cell survival and proliferation. In vitro studies indicate that Digitoxigenin exhibits biological activity in the nanomolar to low micromolar range, including potent cytotoxic effects linked to disruption of Na?/K?-ATPase-dependent protein synthesis and induction of apoptosis, supporting its investigation as a potential antitumor agent. In research settings, Digitoxigenin is commonly employed in cell-based assays to study ion transport, cardiac glycoside pharmacology, and signal transduction, as well as in exploratory in vivo models evaluating cardiotonic or anticancer effects, with experimental concentrations or dosing regimens tailored to specific study designs and objectives.