The aim of this study was to assess the antioxidant and antihyperglycemic effects and toxicity of Cistus ladaniferus L., extracts to confirm their use in traditional phytotherapy.The polyphenolic compounds were identified using HPLC/UV and HPLC/DAD, as well as HPLC/UV-ESI-MS.The results showed that cistus was rich in punicalin (20.96%).Antioxidant activity was evaluated using the FRAP and DPPH tests, Cistus ladaniferus L. showed very powerful antiradical activity (IC₅₀ = 12μg/mL) for the fraction of Et acetate from the hydromethanolic extract, compared with 47.76 μg/mL for ascorbic acid used as a reference; and the FRAP method with EC₅₀ = 0.45 mg/mL for the n-butanol fraction of the hydroethanolic extractAnal. of the oral glucose tolerance test and comparison of the total areas under the blood glucose curve over a period of 150 min showed that the decocted extract had a significant postprandial antihyperglycemic effect in normal Wistar rats.The finding of acute toxicity doesn′t show any toxicity for the decoctate even at 2 g/Kg.These very encouraging and pos. results suggest that cistus extract could serve as a dietary supplement for both preventive and curative purposes in healthy individuals and diabetics.However, further investigations should be carried out determine and understand precisely the actions of main compounds of Cistus ladaniferus L.Moreover, the determination of the safety of these bioactive compounds should also evaluated.

2023-04-24·Journal of chemical information and modeling

Identification of Potent and Selective Acetylcholinesterase/Butyrylcholinesterase Inhibitors by Virtual Screening.

Article

作者: Huang, Ruili ; Xu, Tuan ; Li, Andrew J. ; Li, Shuaizhang ; Xia, Menghang ; Huang, Wenwei ; Zhao, Jinghua ; Sakamuru, Srilatha

Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) play important roles in human neurodegenerative disorders such as Alzheimer's disease. In this study, machine learning methods were applied to develop quantitative structure-activity relationship models for the prediction of novel AChE and BChE inhibitors based on data from quantitative high-throughput screening assays. The models were used to virtually screen an in-house collection of ∼360K compounds. The optimal models achieved good performance with area under the receiver operating characteristic curve values ranging from 0.83 ± 0.03 to 0.87 ± 0.01 for the prediction of AChE/BChE inhibition activity and selectivity. Experimental validation showed that the best-performing models increased the assay hit rate by several folds. We identified 88 novel AChE and 126 novel BChE inhibitors, 25% (AChE) and 53% (BChE) of which showed potent inhibitory effects (IC₅₀ < 5 μM). In addition, structure-activity relationship analysis of the BChE inhibitors revealed scaffolds for chemistry design and optimization. In conclusion, machine learning models were shown to efficiently identify potent and selective inhibitors against AChE and BChE and novel structural series for further design and development of potential therapeutics against neurodegenerative disorders.

1985-05-01·European Journal of Pharmacology3区 · 医学

Effects of pincainide on contractile responses and 45Ca movements in rat isolated vascular smooth muscle

3区 · 医学

Article

作者: M.Teresa Tejerina ; Juan J. Diez ; Santos Barrigón ; Juan Tamargo

The effects of pincainide, a new beta-amino anilide, on contractile responses and 45Ca fluxes were studied in rat aorta and on spontaneous mechanical activity in rat portal veins. Pincainide (10(-5) to 10(-2) M) produced a dose-dependent inhibition of noradrenaline (NA) and high K+ -induced contractions. These inhibitory effects were observed with pincainide added either before or after the induced contractions. The Ca2+ -induced contractions of K+ -depolarized aorta as well as the spontaneous mechanical activity of portal veins were also inhibited by pincainide. Pincainide (5 X 10(-3) M) inhibited the 45Ca influx stimulated by 10(-6) M NA and increased 45Ca efflux. It was concluded that in isolated rat aorta, pincainide not only inhibited the influx of Ca2+ reducing the contractile responses to NA and high K+ but it also inhibited other effects related to NA-induced release of intracellular Ca2+ stores.

100 项与 Pincainide 相关的药物交易

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