6,6′-Dihydroxythiobinupharidine

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一般描述

6,6′-Dihydroxythiobinupharidine is an active compound found inNuphar luteaextract. It is a dimeric sesquiterpene thioalkaloid which presents multiple activities.

生化/生理作用

6,6′-Dihydroxythiobinupharidine inhibits NFκB activation, leading to an induction of apoptosis via cleavage of procaspase-9 and poly (ADP-ribose) polymerase (PARP).
It was also found to act synergistically with cytotoxic drugs such as cisplatin and etoposide, enabling their cytotoxic effect at lower concentrations.
6,6′-Dihydroxythiobinupharidine was found to have cytotoxic activity at a concentration of ~10 μM on human leukemia cells (U937), mouse melanoma cells (B16F10), and human fibroblasts (HT1080).
In addition,Nuphar luteaextract was effective against bothLeishmaniapromastigote and amastigote forms (IC₅₀= 2 ± 0.12 μg/mL; ID₅₀= 0.65 ± 0.023 μg/mL; LD₅₀= 2.1 ± 0.096 μg/mL, STI = 3.23). A synergistic antileishmanial activity was demonstrated with the antileishmanial drug, paromomycin.
Recently 6,6′-dihydroxythiobinupharidine was found to be active against MRSA and VRE strains with an MIC of 1-4 μg/mL. Inhibition of DNA topoisomerase IV but not DNA gyrase inS. aureuswas suggested as the mechanism of action. 6,6′-Dihydroxythiobinupharidine was also shown to promote neutrophil effector bactericidal functions.

基本信息

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安全信息