Two New Steroidal Glycosides from Liriope muscari

Two new steroidal glycosides named Lm-4 （1） and Lm-5 （2） were isolated from the tubers of Liriope muscari. Their structures were elucidated by 1D and 2D NMR, ESI/MALDIMS techniques, and chemical methods.

荞麦炭疽病菌生物学特性及杀菌剂室内毒力测定

由冬麦刺盘孢(Colletotrichum liriopes)引起的荞麦炭疽病是我国荞麦主产区的新病害。为明确荞麦炭疽病菌生物学特性,并筛选出有效的防治药剂,本研究以C.liriopes 9J1为试材,采用菌丝生长速率法,研究了不同培养条件下C.liriopes 9J1菌丝生长情况,并用菌丝生长抑制率法对10种杀菌剂进行室内毒力测定。结果表明,荞麦炭疽病菌生长的最适温度为25℃;全光照条件下病菌菌丝生长速率最快;最适pH值为6;病菌生长的最适碳源和氮源分别为山梨醇和牛肉膏。供试的10种药剂对荞麦炭疽病菌菌丝生长均有一定毒力作用,其中10%苯醚甲环唑微乳剂的毒力作用最强,EC_(50)为0.004 mg/L;80%代森锰锌可湿性粉剂的毒力作用最弱,EC_(50)为6.915 mg/L。

The genus Liriope： Phytochemistry and pharmacology

Liriope(Liliaceae) species have been used as folk medicines in Asian countries since ancient times. From Liriope plants(8 species), a total of 132 compounds(except polysaccharides) have been isolated and identified, including steroidal saponins, flavonoids, phenols, and eudesmane sesquiterpenoids. The crude extracts or monomeric compounds from this genus have been shown to exhibit anti-tumor, anti-diabetic, anti-inflammatory, and neuroprotective activities. The present review summarizes the results on phytochemical and biological studies on Liriope plants. The chemotaxonomy of this genus is also discussed.

Effects of aqueous extract from red Liriope platyphylla on phthalic-anhydride-induced atopic dermatitis in Interleukin-4/Luciferase/Consensus non-coding sequence-1 transgenic mice evaluated in terms of luciferase signal and general phenotype biomarkers

OBJECTIVE: To quantitatively evaluate the therapeutic effects of Red Liriope platyphylla(RLP) on atopic dermatitis(AD), alterations in the luciferase(Luc) signal and general phenotype biomarkers were compared in phthalic anhydride(PA) treated Interleukin-4(IL-4)/Luc/Consensus non-coding sequence-1(CNS-1) transgenic(Tg) mice following treatment with aqueous extract of RLP(AEt RLP) for4 weeks.METHODS: Alterations in AD phenotypes were measured in IL-4/Luc/CNS-1 Tg mice following treatment with AEt RLP using inflammation parameter analysis, bioluminescence imaging analysis, histological analysis, reverse transcription-polymerase chain reaction, enzyme linked immunosorbent assay and Western blot analysis.RESULTS: RLP contained high concentrations of total phenolic compounds, total flavonoid compounds and 5-HNE related to AD therapy. The Luc signal was only detected in the abdominal region and the submandibular lymph node(SL), mesenteric lymph node(ML), thymus and pancreas of the PA treated group. This signal was significantly decreased by 28%-73% throughout the body and in the four organs in PA + AEt RLP treated group. Furthermore, the lymph node weight, immunoglobulin E concentration and dermal thickness were decreased by 37%-67% in the PA + AEt RLP treated group.CONCLUSION: Our findings suggest that the therapeutic effect of AEt RLP on PA induced AD could be successfully quantified by comparison of Luc signals and AD phenotype markers in IL-4/Luc/CNS-1Tg mice, and that the Luc signal was as sensitive as the general AD phenotypes, enabling detection of effects without euthanasia.

响应面法优化超声辅助提取山麦冬多糖工艺

采用响应面法优化山麦冬[Liriope spicata(Thunb.)Lour.]多糖超声波辅助提取工艺。在单因素试验的基础上,采用Box-Behnken设计研究超声时间、液料比和超声功率3个因素对山麦冬多糖提取得率的影响,得出的最佳提取条件为超声时间40 min,液料比31∶1(m L∶g),超声功率360 W,在此条件下山麦冬多糖的提取率为4.33%。

湖北麦冬叶片快繁体系的建立

[目的]建立湖北麦冬叶片的快繁体系。[方法]以湖北麦冬幼嫩叶片为外殖体,以MS为基本培养基,向其中添加不同浓度的6-BA、NAA、GA后进行培养,探讨外源激素对其愈伤形成、不定芽分化、增殖与不定根形成的影响。[结果]采用MS+0.1～2.0 mg/L 6-BA+0.01～0.5 mg/L NAA培养基,愈伤诱导率在20%以上;采用MS+0.1～1.0 mg/L 6-BA+0.01～0.5 mg/LNAA+0.1～1.0 mg/L GA培养基,对芽的生长及增殖效果好,说明GA具有提高成苗率的作用;采用1/2MS+0.1～0.5 mg/L NAA或0.1 mg/L IBA或0.1～0.5mg/L IAA,20 d内生根率可达97%以上。在腐叶土∶珍珠岩=5∶3的基质中驯苗,成活率可达90%以上。[结论]优选出了湖北麦冬叶片的最佳快繁体系,为麦冬的开发利用提供了理论依据。

短葶山麦冬皂苷C提取工艺优化及因子效应分析

通过二次旋转回归试验优化短葶山麦冬[Liriope muscari(Decn.)Bailey]皂苷C提取工艺,获到最佳提取工艺参数为:提取温度40℃,酒精浓度为100%,料液比1∶30,超声时间40 min,短葶山麦冬皂苷C得率为3.33%。因子效应分析结果表明,不同因子对短葶山麦冬皂苷C得率的贡献值表现为乙醇浓度>提取温度>料液比>超声时间。