Actinorhizal plants contain numerous antioxidants that may play a crucial role in preventing the formation of tumors.H-Ras p21,a member of the Ras-GTPase family,is a promising target to treat various kinds of cancers....Actinorhizal plants contain numerous antioxidants that may play a crucial role in preventing the formation of tumors.H-Ras p21,a member of the Ras-GTPase family,is a promising target to treat various kinds of cancers.An in silico docking study was carried out to identify the inhibitory potential of compounds of these plants against H-Ras by using Discovery Studio 3.5 and by using Autodock 4.2.Docking studies revealed that four compounds,isorhamnetin-7-rhamnoside,quercetin-3-glucoside-7-rhamnoside（present in H.rhamnoides）,zeaxanthin,and translutein（present in H.salicifolia） significantly bind with binding energies-17.1534,-14.7936,-10.2105 and-17.2217 Kcal/mol,respectively,even though they slightly deviate from Lipinski＇s rule.Absorption,distribution,metabolism,excretion and toxicity（ADME/tox） analyses of these compounds and their stereoisomers showed that they were less toxic and non-mutagenic.Amongst them,isorhamntein-7-rhamnoside showed hepatotoxicity.Hence,these compounds can be further investigated in vivo to optimize their formulation and concentration and to develop potential chemical entities for the prevention and treatment of cancers.展开更多
[Objectives]The research aimed to compare antioxidation abilities of different extraction phases of Hippophae rhamnoides L. leaves extract and find its active marker. [Methods] H. rhamnoides L. leaves were extracted f...[Objectives]The research aimed to compare antioxidation abilities of different extraction phases of Hippophae rhamnoides L. leaves extract and find its active marker. [Methods] H. rhamnoides L. leaves were extracted firstly by 75% of ethanol,and then were extracted by petroleum ether,chloroform,ethyl acetate and n-butanol in turn after decompression concentration. Via DPPH and ABTS^+ radical scavenging experiments and Fe^(3+) reduction experiment,antioxidation activity of each phase was evaluated. And chemical compositions related to its antioxidation activity were determined by using UPLC for qualitative identification. [Results] Antioxidation activity sequence of each phase was ethyl acetate phase≈n-butanol phase > alcohol extract of raw material > water phase > chloroform phase > petroleum ether phase. 33 kinds of chemical compositions were isolated from alcohol extract and extracts by using UPLC. [Conclusions] UPLC and antioxidation activity test were used simultaneously to analyze alcohol extract and extracts of H. rhamnoides L. leaves,which could fast and accurately determine extraction phase with the strongest antioxidation ability. The research is significant to study active ingredients and mechanism of antioxidation from H. rhamnoides L. leaves.展开更多
文摘Actinorhizal plants contain numerous antioxidants that may play a crucial role in preventing the formation of tumors.H-Ras p21,a member of the Ras-GTPase family,is a promising target to treat various kinds of cancers.An in silico docking study was carried out to identify the inhibitory potential of compounds of these plants against H-Ras by using Discovery Studio 3.5 and by using Autodock 4.2.Docking studies revealed that four compounds,isorhamnetin-7-rhamnoside,quercetin-3-glucoside-7-rhamnoside（present in H.rhamnoides）,zeaxanthin,and translutein（present in H.salicifolia） significantly bind with binding energies-17.1534,-14.7936,-10.2105 and-17.2217 Kcal/mol,respectively,even though they slightly deviate from Lipinski＇s rule.Absorption,distribution,metabolism,excretion and toxicity（ADME/tox） analyses of these compounds and their stereoisomers showed that they were less toxic and non-mutagenic.Amongst them,isorhamntein-7-rhamnoside showed hepatotoxicity.Hence,these compounds can be further investigated in vivo to optimize their formulation and concentration and to develop potential chemical entities for the prevention and treatment of cancers.
基金Supported by Application Technology Research and Development Fund Project in Aba Prefecture(33)Science and Technology Innovation Program for Postgraduate of Southwest Minzu University(CX2016SZ031)
文摘[Objectives]The research aimed to compare antioxidation abilities of different extraction phases of Hippophae rhamnoides L. leaves extract and find its active marker. [Methods] H. rhamnoides L. leaves were extracted firstly by 75% of ethanol,and then were extracted by petroleum ether,chloroform,ethyl acetate and n-butanol in turn after decompression concentration. Via DPPH and ABTS^+ radical scavenging experiments and Fe^(3+) reduction experiment,antioxidation activity of each phase was evaluated. And chemical compositions related to its antioxidation activity were determined by using UPLC for qualitative identification. [Results] Antioxidation activity sequence of each phase was ethyl acetate phase≈n-butanol phase > alcohol extract of raw material > water phase > chloroform phase > petroleum ether phase. 33 kinds of chemical compositions were isolated from alcohol extract and extracts by using UPLC. [Conclusions] UPLC and antioxidation activity test were used simultaneously to analyze alcohol extract and extracts of H. rhamnoides L. leaves,which could fast and accurately determine extraction phase with the strongest antioxidation ability. The research is significant to study active ingredients and mechanism of antioxidation from H. rhamnoides L. leaves.
