The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years...The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years to control this fly. However, to our knowledge, no chemical studies have been carried out. Thus, the aim of this study is to determine the chemical composition of the essential oil of O. americanum leaves collected in Senegal and Gambia. The essential oil obtained by hydrodistillation of these leaves is analyzed by GC/FID and GC/MS. Yields of essential oils from O. americanum leaves are 3.84% and 2.13%, respectively. Analysis of these essential oils by GC/FID and GC/MS allowed the identification of 23 compounds representing almost 100% of the total compositions. These essential oils are mainly dominated by methyleugenol (72.0% and 75.8%, respectively). Other components in significant percent are trans-β-caryophyllene (13.9% and 13.0%, respectively), germacrene D (4.1% and 3.7%, respectively), β-elemene (3.3% and 0.9%, respectively). Due to the high methyleugenol content, this study explains the attractive potential of O. americanum towards B. dorsalis. In perspective, we plan to evaluate the attractive effect of the essential oil and leaf powder of O. americanum against B. dorsalis, a real pest of mango orchards in Senegal.展开更多
Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital...Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital. Eight biotransformation products named （R）-l＇-methoxymethyleugenol （2）, 3-（3,4-dimethoxyphenyl）-l-methoxyprop-2-ene （3）, cis-3,4-dimethoxycinnamyl acetate （4）, trans-3,4-dimethoxycinnamyl acetate （5）, （R）-I hydroxymethyleugenol （6）, trans-3,4-dimethoxycinnamyl alcohol （7）, cis-3,4-dimethoxycinnamyl alcohol （8）, and （R）-3-（3,4-dimethoxyphenyl）-propane-l,2-diol （9） were obtained and their structures were elucidated by NMR and MS data analysis and by comparison with the previously reported data. The biotransformation of 1 may provide valuable information for the use of methyleugenol. The NMR data of compounds 4 and 6 were reported for the first time.展开更多
文摘The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years to control this fly. However, to our knowledge, no chemical studies have been carried out. Thus, the aim of this study is to determine the chemical composition of the essential oil of O. americanum leaves collected in Senegal and Gambia. The essential oil obtained by hydrodistillation of these leaves is analyzed by GC/FID and GC/MS. Yields of essential oils from O. americanum leaves are 3.84% and 2.13%, respectively. Analysis of these essential oils by GC/FID and GC/MS allowed the identification of 23 compounds representing almost 100% of the total compositions. These essential oils are mainly dominated by methyleugenol (72.0% and 75.8%, respectively). Other components in significant percent are trans-β-caryophyllene (13.9% and 13.0%, respectively), germacrene D (4.1% and 3.7%, respectively), β-elemene (3.3% and 0.9%, respectively). Due to the high methyleugenol content, this study explains the attractive potential of O. americanum towards B. dorsalis. In perspective, we plan to evaluate the attractive effect of the essential oil and leaf powder of O. americanum against B. dorsalis, a real pest of mango orchards in Senegal.
基金National Natural Science Foundation of China(Grant No.3097386381161120429)National Key Technology R&D Program of China(Grant No.2011BAI07B08)
文摘Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital. Eight biotransformation products named （R）-l＇-methoxymethyleugenol （2）, 3-（3,4-dimethoxyphenyl）-l-methoxyprop-2-ene （3）, cis-3,4-dimethoxycinnamyl acetate （4）, trans-3,4-dimethoxycinnamyl acetate （5）, （R）-I hydroxymethyleugenol （6）, trans-3,4-dimethoxycinnamyl alcohol （7）, cis-3,4-dimethoxycinnamyl alcohol （8）, and （R）-3-（3,4-dimethoxyphenyl）-propane-l,2-diol （9） were obtained and their structures were elucidated by NMR and MS data analysis and by comparison with the previously reported data. The biotransformation of 1 may provide valuable information for the use of methyleugenol. The NMR data of compounds 4 and 6 were reported for the first time.
文摘目的基于蛋白组学探讨细辛水提物诱发肝损伤的作用机制。方法30只大鼠随机分为对照组和细辛高、低剂量(12、6 g/kg)组,每组10只,每日ig给药1次,连续28 d。末次给药后采取血清样本和肝脏样本,检测血清丙氨酸氨基转移酶(alanine aminotransferase,ALT)、天冬氨酸氨基转移酶(aspartate aminotransferase,AST)活性;苏木素-伊红(hematoxylineosin,HE)染色法观察肝脏病理组织形态;串联质谱标签定量蛋白质组学法检测肝组织差异表达蛋白;免疫组化法测定大鼠肝脏组织细胞色素P4501A1(cytochrome P4501A1,CYP1A1)、金属硫蛋白-1(metallothionein-1,MT-1)、肌肉特异性烯醇化酶3(recombinant enolase 3,ENO3)、抗原转运蛋白(transporter associated with antigen processing 1,TAP1)蛋白表达。CCK-8法考察细辛水提物对小鼠肝实质AML-12细胞活力的影响,并采用qRT-PCR与Western blotting检测AML-12细胞中CYP1A1、MT-1、ENO3、TAP1蛋白及m RNA表达。结果与对照组比较,细辛组大鼠血清AST、ALT活性均显著升高(P<0.01);肝组织出现明显炎性改变;肝组织中存在179个差异蛋白,主要富集于次级代谢产物的生物合成途径、视黄醇代谢途径、吞噬体等;肝组织CYP1A1、MT-1蛋白表达显著增加(P<0.01),ENO3、TAP1蛋白表达显著减少(P<0.01)。体外实验结果显示,细辛组AML-12细胞CYP1A1、MT-1 m RNA与蛋白表达显著增加(P<0.05、0.01),ENO3、TAP1 m RNA与蛋白表达水平显著降低(P<0.05、0.01)。结论细辛水提物可诱发大鼠肝损伤,引起肝功能异常和肝组织病理改变,肝损伤机制与上调CYP1A1、MT-1 m RNA及蛋白表达及下调ENO3、TAP1 m RNA及蛋白表达有关。
