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https://www.selleckchem.com/products/finerenone.html Eight new compounds (Entanutilins O-V; 1-8), including four limonoids, two steroids, one triterpenoid and one lignan were isolated from the stem barks of Entandrophragma utile. Their structures were determined by detailed spectroscopic analyses (HRESIMS and 1D/2D-NMR). Bioactivity screening indicated that compounds 1, 6 and 7 exhibited effective in reversing resistance in MCF-7/DOX cells at a nontoxic concentration of 30 μM with 18.18-, 7.43- and 7.94-fold enhancing effect, respectively, meanwhile, compounds 5 and 6 showed moderate NO inhibitory activities in LPS-activated RAW 264.7 macrophages. We have shown previously that alpha-santalol, a major component of sandalwood oil inhibits growth of cultured prostate cancer cells in vitro by causing apoptosis, but the mechanism of cell death is not fully elucidated. The present study was undertaken to investigate the role of PI3K/Akt/survivin pathway in alpha-santalol-induced apoptosis employing cultured LNCaP and PC-3 human prostate cancer cells. Treatment of prostate cancer cells with alpha-santalol (20, 40 μM) resulted in the down regulation of survivin and p-AKT (s-473) expression and statistically significant reduction in total survivin levels as evidenced by survivin ELISA assay. Furthermore, inhibition of PI3K-Akt pathway by pharmacological inhibitor, LY294002 enhanced the apoptotic cell death induced by alpha-santalol as determined by cell viability, cellular morphology, active caspase-3 activity and expression of cleaved PARP, cleaved caspase-3 levels. In conclusion, the present study provides novel insight into the molecular circuitry of alpha-santalol-induced cell death and reveals that alpha-santalol targets Akt/Survivin pathway to induce cell death and that the cell death is increased in the presence of a known inhibitor of the pathway. Five new alkaloids (1-5), including three new aporphine alkaloids and two new phenanthrene alkaloids, together with 10 kn

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