This study employed the α-glucosidase inhibitory activity model as an anti-diabetic assay and implemented a bioactivity-guided isolation strategy to identify novel natural compounds with potential therapeutic propert...This study employed the α-glucosidase inhibitory activity model as an anti-diabetic assay and implemented a bioactivity-guided isolation strategy to identify novel natural compounds with potential therapeutic properties.Hypericum sampsonii was investigated,leading to the isolation of two highly modified seco-polycyclic polyprenylated acylphloroglucinols(PPAPs)(1 and 2),eight phenolic derivatives(3-10),and four terpene derivatives(11-14).The structures of compounds 1 and 2,featuring an unprecedented octahydro-2H-chromen-2-one ring system,were fully characterized using extensive spectroscopic data and quantum chemistry calculations.Six compounds(1,5-7,9,and 14)exhibited potential inhibitory effects against α-glucosidase,with IC_(50) values ranging from 0.050±0.0016 to 366.70±11.08μg·mL^(-1).Notably,compound 5(0.050±0.0016μg·mL^(-1))was identified as the most potential α-glucosidase inhibitor,with an inhibitory effect about 6900 times stronger than the positive control,acarbose(IC_(50)=346.63±15.65μg·mL^(-1)).A docking study was conducted to predict molecular interactions between two compounds(1 and 5)and α-glucosidase,and the hypothetical biosynthetic pathways of the two unprecedented seco-PPAPs were proposed.展开更多
[目的]建立不同产地元宝草中12个成分含量同步检测方法,并采用化学计量学和熵权逼近理想解排序(entropy weighttechnique for order preference by similarity to an ideal solution,EW-TOPSIS)法对其质量进行评价。[方法]采用Agilent 5...[目的]建立不同产地元宝草中12个成分含量同步检测方法,并采用化学计量学和熵权逼近理想解排序(entropy weighttechnique for order preference by similarity to an ideal solution,EW-TOPSIS)法对其质量进行评价。[方法]采用Agilent 5 TC-C18色谱柱,以0.5%磷酸-乙腈为流动相,流速1.0 mL·min^(-1),检测波长254 nm和210 nm,以芒果苷为内参物,建立其与芦丁、金丝桃苷、槲皮素、山柰酚、Ⅰ3,Ⅱ8-双芹菜苷元、1,7-二羟基呫吨酮、1,3-二羟基-5-甲氧基呫吨酮、1,3,6,7-四羟基呫吨酮、大黄素、大黄素甲醚、贯叶金丝桃素的相对校正因子,并计算含量,同时以外标法测定18批元宝草中12个成分的含量;采用化学识别模式和EWTOPSIS法建立元宝草质量优劣评价模型,对其整体质量进行综合评价。[结果]外标法方法学考察结果均符合《中国药典》要求;一测多评(quantitative analysis of multi-components by single marker,QAMS)法与外标法所得含量结果无明显差异。主成分分析(principal component analysis,PCA)结果显示18批样品聚为3类;正交偏最小二乘法-判别分析(orthogonal partial least squaresdiscriminant analysis,OPLS-DA)将18批样品显著分类,筛选出导致不同产地元宝草质量差异的5个差异标志物;EW-TOPSIS法分析结果显示四川、贵州和广西产地元宝草整体质量较好。[结论]元宝草中12种成分含量测定的QAMS法,操作便捷,结果准确;化学模式识别及EW-TOPSIS法客观全面,可用于元宝草的整体质量评价。展开更多
The total flavonoid contents in cultural materials and natural plant of Hypericum sampsonii Hance were analysed and comparedwith that in cultural materials of H. perforatum Linn. The results showed that the total flav...The total flavonoid contents in cultural materials and natural plant of Hypericum sampsonii Hance were analysed and comparedwith that in cultural materials of H. perforatum Linn. The results showed that the total flavonoid contents reached 5.416%-5.868% in H.sampsonii calli cultured for 30 d, which werehigher than that ofnatural plantof thisspecies (4.325%-4.527%) and approached to cultural materials of H. perforatum .展开更多
基金supported by the National Natural Science Foundation of China(No.32270413,U1812403)the Science and Technology Department of Guizhou Province(No.QKH 2020-1Z076)+5 种基金the 13th batch of Outstanding Young Scientific and Technological Talents in Guizhou Province(No.QKHPTRC[2021]5633)Cultivation project of National Natural Science Foundation of Guizhou Medical University(No.19NSP003)the Education Department of Guizhou Province(No.QJH KY[2021]189)the Natural Science Foundation of Guizhou Province(No.QKHZYD[2022]4015)High-level Innovative Talents in Guizhou Province(Thousand Levels of Talent for Chunmao Yuan in 2018)“Light of the West”Talent Cultivation Program of Chinese Academy of Sciences for Chunmao Yuan(No.RZ[2020]82).
文摘This study employed the α-glucosidase inhibitory activity model as an anti-diabetic assay and implemented a bioactivity-guided isolation strategy to identify novel natural compounds with potential therapeutic properties.Hypericum sampsonii was investigated,leading to the isolation of two highly modified seco-polycyclic polyprenylated acylphloroglucinols(PPAPs)(1 and 2),eight phenolic derivatives(3-10),and four terpene derivatives(11-14).The structures of compounds 1 and 2,featuring an unprecedented octahydro-2H-chromen-2-one ring system,were fully characterized using extensive spectroscopic data and quantum chemistry calculations.Six compounds(1,5-7,9,and 14)exhibited potential inhibitory effects against α-glucosidase,with IC_(50) values ranging from 0.050±0.0016 to 366.70±11.08μg·mL^(-1).Notably,compound 5(0.050±0.0016μg·mL^(-1))was identified as the most potential α-glucosidase inhibitor,with an inhibitory effect about 6900 times stronger than the positive control,acarbose(IC_(50)=346.63±15.65μg·mL^(-1)).A docking study was conducted to predict molecular interactions between two compounds(1 and 5)and α-glucosidase,and the hypothetical biosynthetic pathways of the two unprecedented seco-PPAPs were proposed.
文摘[目的]建立不同产地元宝草中12个成分含量同步检测方法,并采用化学计量学和熵权逼近理想解排序(entropy weighttechnique for order preference by similarity to an ideal solution,EW-TOPSIS)法对其质量进行评价。[方法]采用Agilent 5 TC-C18色谱柱,以0.5%磷酸-乙腈为流动相,流速1.0 mL·min^(-1),检测波长254 nm和210 nm,以芒果苷为内参物,建立其与芦丁、金丝桃苷、槲皮素、山柰酚、Ⅰ3,Ⅱ8-双芹菜苷元、1,7-二羟基呫吨酮、1,3-二羟基-5-甲氧基呫吨酮、1,3,6,7-四羟基呫吨酮、大黄素、大黄素甲醚、贯叶金丝桃素的相对校正因子,并计算含量,同时以外标法测定18批元宝草中12个成分的含量;采用化学识别模式和EWTOPSIS法建立元宝草质量优劣评价模型,对其整体质量进行综合评价。[结果]外标法方法学考察结果均符合《中国药典》要求;一测多评(quantitative analysis of multi-components by single marker,QAMS)法与外标法所得含量结果无明显差异。主成分分析(principal component analysis,PCA)结果显示18批样品聚为3类;正交偏最小二乘法-判别分析(orthogonal partial least squaresdiscriminant analysis,OPLS-DA)将18批样品显著分类,筛选出导致不同产地元宝草质量差异的5个差异标志物;EW-TOPSIS法分析结果显示四川、贵州和广西产地元宝草整体质量较好。[结论]元宝草中12种成分含量测定的QAMS法,操作便捷,结果准确;化学模式识别及EW-TOPSIS法客观全面,可用于元宝草的整体质量评价。
文摘The total flavonoid contents in cultural materials and natural plant of Hypericum sampsonii Hance were analysed and comparedwith that in cultural materials of H. perforatum Linn. The results showed that the total flavonoid contents reached 5.416%-5.868% in H.sampsonii calli cultured for 30 d, which werehigher than that ofnatural plantof thisspecies (4.325%-4.527%) and approached to cultural materials of H. perforatum .