Taccalonolide A

Description: Taccalonolide A is the first microtubule stabilizing agent to be discovered from a plant since identification of the mechanism of action of paclitaxel and it is the first natural product steroid identified to have these cellular effects,with cytotoxic and antimalarial activities. Taccalonolide A causes G2-M accumulation, Bcl-2 phosphorylation and initiation of apoptosis. Taccalonolide A is effective in vitro against cell lines that overexpress P-glycoprotein (Pgp) and multidrug resistance protein 7 (MRP7), with an IC50 of 622 nM for SK-OV-3 cells. Target: Microtubule Associated, Apoptosis. Smiles: [H][C@@]12[C@H](OC(C)=O)[C@@]3([H])[C@]4([H])[C@@H](O)C(=O)[C@@]5([H])C[C@@H]6O[C@@H]6[C@H](OC(C)=O)[C@]5(C)[C@@]4([H])[C@H](OC(C)=O)[C@H](OC(C)=O)[C@]3(C)[C@@]1([H])[C@H](C)C=C1OC(=O)[C@@](C)(O)[C@]21C. References: Li J , Risinger A L , Mooberry S L . Taccalonolide microtubule stabilizers[J]. Bioorganic & Medicinal Chemistry, 2014, 22(18):5091-5096.