کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1212200 1494062 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Separation and purification of α-glucosidase inhibitors from Polygonatum odoratum by stepwise high-speed counter-current chromatography combined with Sephadex LH-20 chromatography target-guided by ultrafiltration–HPLC screening
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Separation and purification of α-glucosidase inhibitors from Polygonatum odoratum by stepwise high-speed counter-current chromatography combined with Sephadex LH-20 chromatography target-guided by ultrafiltration–HPLC screening
چکیده انگلیسی


• A rapid method was developed to screen α-glucosidase inhibitors from P. odoratum by combining ultrafiltration with HPLC.
• Stepwise HSCCC with Sephadex LH-20 was used to isolate bioactive compounds.
• Five phenylethyl cinnamides and four homoisoflavanones were identified.
• α-Glucosidase inhibitory activity of isolated compounds were evaluated.
• Three compounds were first reported in P. odoratum.

Although Polygonatum odoratum has been widely used as medicinal plant and food supplement for treating diabetes, little is known regarding its bioactive components. In this study, ultrafiltration–HPLC based ligand screening was developed to screen α-glucosidase inhibitors from P. odoratum for the first time. Then bioactive components were target-guided separated by combining stepwise high-speed counter-current chromatography (HSCCC) using petroleum ether–ethyl acetate–methanol–water (1:4:0.8:4.2, v/v/v/v), (1:4:1.8:3.2, v/v/v/v) and (1:4:2.3:2.7, v/v/v/v) as solvent systems with Sephadex LH-20 chromatography eluted by MeCN–MeOH (1:1, v/v). Five phenethyl cinnamides, N-cis-feruloyloctopamine (1); N-trans-p-coumaroyloctopamine (2), N-trans-feruloyloctopamine (3), N-trans-p-coumaroyltyramine (4) and N-trans-feruloyltyramine (5), and four homoisoflavanones, (3R)-5,7-dihydroxyl-3-(2′,4′-dihydroxylbenzyl)-chroman-4-one (6), (3R)-5,7-dihydroxyl-6-methyl-3-(4′-hydroxylbenzyl)-chroman-4-one (7), (3R)-5,7-dihydroxyl-6-methyl-8-methoxyl-3-(4′-hydroxylbenzyl)-chroman-4-one (8); and (3R)-5,7-dihydroxyl-6,8-dimethyl-3-(4′-hydroxylbenzyl)-chroman-4-one) (9), with purity over 98.5% were purified, and their structures were identified by UV, MS, and 1H NMR. Notably, compounds 2 and 4 were first reported in genus Polygonatum, while compound 1 was first obtained from family Liliaceae. In addition, α-glucosidase inhibitory activities of compounds 1–9 were evaluated, and compounds 2 and 4 exhibited stronger α-glucosidase inhibitory activity with IC50 values of 2.3 and 2.7 μM. The results suggested the potential medicinal use of P. odoratum, and the technology could be widely applied for rapid screening and preparative separation of a group of bioactive compounds from complex matrix.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 985, 15 March 2015, Pages 149–154
نویسندگان
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