目的采用地塞米松建立斑马鱼骨质疏松模型，筛选先导物G39及其结构类似物的抗骨质疏松活性。方法斑马鱼 AB 系胚胎受精后6~72 h 浸于地塞米松溶液建模，受精后3 d分组给药直至受精后6 d，收集固定斑马鱼幼体；采用茜素红染色法显示成骨...目的采用地塞米松建立斑马鱼骨质疏松模型，筛选先导物G39及其结构类似物的抗骨质疏松活性。方法斑马鱼 AB 系胚胎受精后6~72 h 浸于地塞米松溶液建模，受精后3 d分组给药直至受精后6 d，收集固定斑马鱼幼体；采用茜素红染色法显示成骨发育状况，显微拍照后以 G39为对照，进行斑马鱼头面骨成骨面积和骨矿化密度的半定量分析，比较六种2-乙酰苯并五元杂环类化合物潜在的抗骨质疏松活性。结果 G395μg/ml 组对地塞米松导致的斑马鱼骨质疏松具有显著的改善作用，且实验结果与地塞米松大鼠模型具有一致性。以此筛选 G39衍生物体内活性，发现苯并呋喃衍生物410活性优于 G39。结论地塞米松斑马鱼骨质疏松模型评价周期缩短、成本低，使抗骨质疏松药物体内活性批量筛选成为可能，为更快更准地发现抗骨质疏松候选药物打下坚实基础。通过本研究筛选得到了全新结构类型的抗骨质疏松化合物410，其活性较 G39更强，值得进一步研究。展开更多
In addition to six known flavonoids quercitrin, hyperoside, avicularin, rutin, quercetin and kaemferol, a new flavonol glycoside named 6″_O_acetyl quercetin 3_O_β_ D _alloside (1) was isolated from the aerial par...In addition to six known flavonoids quercitrin, hyperoside, avicularin, rutin, quercetin and kaemferol, a new flavonol glycoside named 6″_O_acetyl quercetin 3_O_β_ D _alloside (1) was isolated from the aerial parts of Hypericum perforatum L. The structures were determined on the basis of spectroscopic methods (UV, IR, FAB_MS, 1H_NMR and 13 C NMR). Antifungal assay of all compounds showed that metabolite 1, quercitrin and quercetin were inhibitory to the growth of phytopathogenic fungus Helminthosporium sativum Pamel King et Bakke with minimum inhibitory concentrations (MICs) of 25, 50 and 50 μg/mL, respectively. Moreover, glycoside 1 and quercitrin were also shown to be able to inhibit the growth of Fusarium graminearum Schw. with MIC of 100 μg/mL. The MICs of ketoconazole used as control against the test fungi were 0.5 μg/mL in our assay.展开更多
An efficient synthesis of chromeno[4,3-b]quinoline derivatives via one-pot,four-component reaction of 4-hydroxycoumarin, formaldehyde,cyclohexanedione,ammonium ceric nitrate under microwave irradiation was accomplishe...An efficient synthesis of chromeno[4,3-b]quinoline derivatives via one-pot,four-component reaction of 4-hydroxycoumarin, formaldehyde,cyclohexanedione,ammonium ceric nitrate under microwave irradiation was accomplished.The structures of these compounds were unambiguously confirmed by single crystal X-ray diffraction.Furthermore,the anti-AChE activities of these compounds in vitro were investigated at concentrations of 20μM and 50μM by using a standard Ellman's method.The relationship of inhibitory activities and structures of these chromeno [4,3-b]quinolines was also systematically studied.Of all the compounds investigated,4ag emerged as the most potent AChE inhibitor with IC50 values of 5.63μM,and it might be used as potent lead for the development anti-AChE agents.Moreover,molecular modelling was conducted to understand the optimal interaction of AChE with these types of compounds.展开更多
文摘In addition to six known flavonoids quercitrin, hyperoside, avicularin, rutin, quercetin and kaemferol, a new flavonol glycoside named 6″_O_acetyl quercetin 3_O_β_ D _alloside (1) was isolated from the aerial parts of Hypericum perforatum L. The structures were determined on the basis of spectroscopic methods (UV, IR, FAB_MS, 1H_NMR and 13 C NMR). Antifungal assay of all compounds showed that metabolite 1, quercitrin and quercetin were inhibitory to the growth of phytopathogenic fungus Helminthosporium sativum Pamel King et Bakke with minimum inhibitory concentrations (MICs) of 25, 50 and 50 μg/mL, respectively. Moreover, glycoside 1 and quercitrin were also shown to be able to inhibit the growth of Fusarium graminearum Schw. with MIC of 100 μg/mL. The MICs of ketoconazole used as control against the test fungi were 0.5 μg/mL in our assay.
基金NSFC(Grant No.81773557,81573279,81373255)Major Project of Technology Innovation Program of Hubei Province(Grant No.2016ACA126)+1 种基金NSFHP(Grant No.2017CFA024)and the Fun damental Research Funds for the Central Universities of China(Grant No.2042017kf0288)
文摘An efficient synthesis of chromeno[4,3-b]quinoline derivatives via one-pot,four-component reaction of 4-hydroxycoumarin, formaldehyde,cyclohexanedione,ammonium ceric nitrate under microwave irradiation was accomplished.The structures of these compounds were unambiguously confirmed by single crystal X-ray diffraction.Furthermore,the anti-AChE activities of these compounds in vitro were investigated at concentrations of 20μM and 50μM by using a standard Ellman's method.The relationship of inhibitory activities and structures of these chromeno [4,3-b]quinolines was also systematically studied.Of all the compounds investigated,4ag emerged as the most potent AChE inhibitor with IC50 values of 5.63μM,and it might be used as potent lead for the development anti-AChE agents.Moreover,molecular modelling was conducted to understand the optimal interaction of AChE with these types of compounds.
