Study on the mechanism of Euphorbia fischeriana Steud.- Jujubae Fructus in the treatment of hepatocirrhosis based on network pharmacology

The active components,targets,and pathways of Euphorbia fischeriana Steud.-Jujubae Fructus in treating hepatocirrhosis and the mechanism of action were explored by means of network pharmacology.Firstly,the active components and related targets of Jujubae Fructus were screened by TCMSP database and standardized by Uniprot database.The compounds of Euphorbia fischeriana Steud.were obtained by searching the literature and finally screened by PubChem database,Swiss ADME,and SwissTargetPrediction.Hepatocirrhosis targets were obtained through Genecards database,PPI network analysis was conducted on common targets of Euphorbia fischeriana Steud.-Jujubae Fructus and hepatocirrhosis by using String database,GO enrichment analysis and KEGG pathway enrichment analysis was conducted through Metascape database by using intersection targets of Euphorbia fischeriana Steud.-Jujubae Fructus and hepatocirrhosis,and the results were drawn by using Weishengxin online drawing platform.Then,the network of drug-compound-target-pathway was constructed by the software of Cytoscape3.8.0.Finally,the above results were verified by molecular docking.47 active compounds from Euphorbia fischeriana Steud.-Jujubae Fructus were screened out,which had 38 common targets,162 intersection targets,and 340 signal pathways with hepatocirrhosis,mainly involving hepatitis C,JAK-STAT signal pathway and AGE-RAGE signal pathway.Targets,such as MAPK1,AKT1,TNF,JUN,IL6 and PTGS2,play important roles in the treatment.The findings suggested that the main active ingredients of Euphorbia fischeriana Steud.-Jujubae Fructus in treating hepatocirrhosis are quercetin,scopolamine,physcion,7-deoxyrangduin,17-Hydroxyjolkinolide A,etc.Molecular docking results showed that the main active components and core targets might have a good binding capacity.This study preliminarily explored the potential mechanism of Euphorbia fischeriana Steud.-Jujubae Fructus in treating hepatocirrhosis and provided a theoretical basis for the clinical application of Euphorbia fischeriana Steud.-Jujubae Fructus.

Anorectal Pharmacodynamics and In Vitro Drug Release of Clerodendrum bungei Steud.Extract Gel

[Objectives]To determine the optimal preparation technology of Clerodendrum bungei Steud.extract gel by orthogonal test and gel quality test method in General Rule 0114 of Chinese Pharmacopoeia(Volume IV,2020 Edition),and to study its anorectal pharmacodynamics and drug release in vitro.[Methods]Carbomer 940,propylene glycol and absolute ethyl alcohol were selected as the main factors,and the preparation technology of C.bungei Steud.extract gel was optimized by orthogonal test.The mouse model of ulcerative hemorrhoids was established with glacial acetic acid(HAC)and compared with Ma Yinglong musk hemorrhoids ointment.The recovery of trauma was compared between the two groups.At the same time,porcine small intestine was used as semi-permeable membrane to make diffusion cell to simulate anal environment,and the drug release in vitro was studied.[Results]The C.bungei Steud.extract gel was smooth in appearance and good in stability.It could effectively treat anal ulcer in mice and release quickly in vitro.[Conclusions]The formula is reasonable,and the effect of animal experiment is remarkable,which can provide a new treatment plan for ulcerative hemorrhoids.

结缕草(Zoysia japonica Steud.)种子打破休眠方法的比较

The efficiency of 7 treatment methods for breaking dormancy in zoysiagrass ( Zoysia japonica Steud.) seeds was synchronously compared. Two methods in which seeds soaking in 30% NaOH solution for 20 or 80 minutes were the optimum for breaking dormancy of seeds due to their simple and easy operation in techniques, economic and rapid effectiveness in performance and high germination rates (77.6% and 88.0% respectively).

三峡库区岸生植物野古草(Arundinella anomala Steud.)光合作用对水淹的响应

为了阐明水淹对三峡库区岸生植物野古草光合作用的影响,模拟了三峡库区消落带水淹发生情况,考察了在不同水淹处理下野古草(Arundinella anomalaSteud.)的光合及叶绿素荧光特性。实验设置了对照(不进行水淹,常规供水管理)、半淹(植株置于水中,植株地上部分一半被淹没)、水下0.5m(植株置于水中,植株顶部在水面下0.5m)、水下2m(植株置于水中,植株顶部在水面下2m)4个不同的水淹深度和02、0、40d和60d等4个不同的水淹时间处理,测定了在不同水淹深度和水淹时间处理下野古草的净光合速率、总叶绿素含量、PSⅡ的最大光化学效率、电子传递速率、表观量子效率、叶绿素利用效率与羧化效率。结果发现,在水淹前期,水淹对野古草的光合特性影响较小,直到水淹60d后,才对野古草的光合特性产生明显影响,且影响程度随水淹深度的不同而不同。野古草在水淹20d和水淹40d后,各水淹处理的净光合速率与对照相比无明显降低,其中水淹20d后,半淹处理的野古草叶片净光合速率比对照还高出16.1%。水淹60d后,水下0.5m和水下2m的净光合速率显著低于对照和半淹,其净光合速率分别为7.51μmol.m-2.s-1和9.15μmol.m-2.s-1。结果表明,水淹20d和40d对野古草的电子传递速率、表观量子效率和羧化效率没有影响。水淹处理60d后,与对照植株相比,半淹处理植株的电子传递速率、表观量子效率、叶绿素利用效率和羧化效率没有明显变化,但水下0.5m和水下2m处理植株的电子传递速率、表观量子效率、叶绿素利用效率和羧化效率有明显降低。在整个实验期间,半淹处理植株的净光合速率、电子传递速率、表观量子效率和羧化效率没有受到任何不利影响。尽管在水淹60d后水下0.5m和水下2m处理植株的净光合速率、电子传递速率、表观量子效率、叶绿素利用效率和羧化效率降低,但降低后的数值仍不低于甚至高于一些自然生长的未受水淹的植物物种。研究表明,野古草对水淹具有很好的耐受能力,是一种可以用于三峡库区消落区植被构建的优良植物物种。

水淹对三峡库区两种岸生植物秋华柳(Salix variegata Franch.)和野古草(Arundinella anomala Steud.)水下光合的影响

为了阐明水淹对三峡库区岸生植物秋华柳(Salix variegata Franch.)和野古草(Arundinella anomala Steud.)水下光合作用的影响,模拟三峡库区消落带水淹发生情况,考察了在不同水淹处理下秋华柳和野古草的水下光合。实验设置了对照(不进行水淹,常规供水管理)和2m深度水淹(植株置于水中,植株顶部在水面下2m)2个不同的水淹深度和5、15、20、40d和60d等5个不同的水淹时间处理,采用Chlorolab-2液相氧电极(英国Hansatech公司生产)测定了在不同水淹时间和水淹深度处理下秋华柳和野古草的水下光合作用。实验结果表明:(1)水淹60d后,秋华柳和野古草的存活率均为100%,而典型的陆生植物香樟和马唐分别在水淹40d和15d后全部死亡。(2)在相同的水淹时间和水淹深度下,秋华柳和野古草的水下光合速率(放氧速率)显著高于典型的陆生植物(香樟(Cinnamomumcamphora(L.)Presl.)和马唐(Digitariasanguinalis(L.)Scop.))(3)在长期水淹的条件下,秋华柳和野古草仍具有水下光合的能力。在水淹60d后,水淹2m的秋华柳和野古草植株的水下放氧速率显著低于对照植株的水下放氧速率,但仍具有水下光合的能力,其水下光合速率分别为0.202μmol.m-.2s-1和0.139μmo.lm-.2s-1。同时,研究也表明在水淹40d和60d后,秋华柳表现出比野古草强的水下光合能力。研究表明,秋华柳和野古草在存活率和水下光合方面对长期水淹表现出良好的适应性,是可以用于三峡库区消落区植被构建的优良植物物种。

草(Beckmannia syzigachne(Steud.) Fernald)生态位的研究

测定浙江省诸暨市无除草剂使用历史的稻茬油菜田中草和其他常见杂草生态位宽度以及它们之间生态位重叠值的结果表明 ,看麦娘、草、早熟禾、春蓼、雀舌草、石龙芮、荠菜、碎米荠、通泉草、猪殃殃和稻槎菜等 1 2种主要杂草均具有较宽的生态位。草与雀舌草、看麦娘、牛繁缕、早熟禾、春蓼和稻槎菜等杂草的生态位重叠值比较大 ,说明它们对环境条件的要求比较接近。

Impact of Veratrum nigrum L.and Euphorbia fischeriana steud.on Embryo Development of Cattle in Sanjiang Area

It is very important to find out the reasons and the morphological changes of cattle abortion, death embryo and teratism in Sanjiang area, in order to determine the preventive measures, to improve animal quality, and to accelerate the animal industry. In the present studies, 25 cows and 25 local bos calves were investigated. The powder of Veratrum nigrum L. and Euphorbia fischeriana steud. was medicated to the animals during the 15 - 19th day of gestation. It was found that there were different poisoning reactions. When the poisoning was on the 15 - 16th day of gestation, the pregnant animals were easy to miscarriage. When the poisoning was on the 17 - 18th day of gestation, the embryos were easy to become teratism. The joint malformation bicephalus and rachischisis could take place for calves. If the poisoning was after 19th day of gestation , there were much more death embryos. The results of the studies showed that Veratrum and Euphorbia fischeriana steud. were the most poisonous plants to the animal industry of Sanjiang area. Some preventive measures were proposed.

Analysis of Heavy Metals in the Vegetative and Generative Organs of Paulownia tomentosa (Thunb.) Steud., 1841

High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samarkand, Samarkand region of the Republic of Uzbekistan. The obtained results confirm the potential of using this plant for phytoremediation purposes.

水淹对三峡库区岸生植物野古草(Arundinella anomala Steud.)恢复生长的影响

[目的]明确三峡库区岸生植物野古草对水淹的耐受能力。[方法]试验设置了3个水淹处理,即对照、水淹根部(植株置于水中,仅地下部分被淹没)和水淹2 m(植株置于水中,顶部距水面2 m),3个水淹时间:40、60、90 d,研究了野古草植株在不同水淹处理后的恢复生长状况。[结果]野古草在水淹结束后的恢复生长期,其分蘖数、叶片数和地上部分生物量都不断增加,水淹处理植株的分蘖数和叶片数在经过60 d的恢复生长后还显著高于对照,不同恢复生长阶段的相对生长速率与对照几乎无显著差异。[结论]野古草植株在水淹后仍能表现出较好的恢复生长,具有较强的水淹耐受能力。

Mechanism Exploration of Euphorbia fischeriana Steud. for Liver Cancer Based on Aspartic Acid Identification in Metabolomics

Objective:To investigate the anti-liver cancer effects and aspartic acid(Asp)-related action mechanism of Euphorbia fischeriana Steud.(LD).Methods:The mice model of liver cancer was established by injection of H22 cells.After 5 days,mice were randomly divided into model group,sorafenib group(20 mg/kg),LD high-dose(LDH,1.36 g/kg) group,LD medium-dose(LDM,0.68 g/kg) group,and LD low-dose(LDL,0.34 g/kg)group,10 mice each group.Drugs were intragastrically administered to the mice once daily for 10 days,respectively.Body weight,tumor size and tumor weight were recorded.Hepatic index was calculated.Pathological changes of liver cancer tissues were evaluated by hematoxylin and eosin staining and TUNEL staining.Liquid chromatography-mass spectrometer was used to analyze different metabolites between the model and LDH groups.Results:After LD treatment,tumor weight,tumor size and hepatic index were reduced compared with the model group.Necrocytosis and karyorrhexis of tumor cells were found.Moreover,61 differential metabolites(18 up-regulated,43 down-regulated) were affirmed and 20 pathways of KEGG(P<0.05) were gotten.In addition,Bel-7402,HepG2 and H22 cell viabilities were significantly increased after adding Asp into the medium.And then,the cell proliferation effect induced by Asp was ameliorated by LD.Conclusion:The anti-liver cancer efficacy of LD extract was validated in H22 mice model,and inhibition of Asp level might be the underlying mechanism.

基于液质联用和模拟炮制的诃子汤制狼毒大戟减毒机制研究

目的基于液质联用(LC-MS)和模拟炮制初探诃子汤制狼毒大戟的减毒机制。方法采用LC-MS分析狼毒大戟诃子汤制前后和狼毒大戟生品二氯甲烷部位诃子汤模拟炮制后的化学成分变化;小鼠分别灌胃给予狼毒大戟生品乙醇提取物、狼毒大戟水制品乙醇提取物、诃子汤乙醇提取物、狼毒大戟诃子汤制品乙醇提取物、狼毒大戟生品二氯甲烷提取物、狼毒大戟诃子汤制品二氯甲烷提取物、狼毒大戟生品二氯甲烷部位诃子汤模拟炮制提取物,以粪便含水量、TNF-α和IL-1β的释放水平以及肠道病理损伤情况评价诃子汤制狼毒大戟和诃子汤模拟炮制狼毒大戟生品二氯甲烷部位的毒性变化。结果狼毒大戟中共鉴定出115种化合物,诃子汤中共鉴定出53种化合物。狼毒大戟经诃子汤炮制后有58种化合物的含量显著降低,12种化合物的含量显著升高。与空白对照组相比,狼毒大戟生品组及其水制品组的粪便含水量、TNF-α和IL-1β的释放水平均显著升高(P<0.01),肠道损伤明显。与狼毒大戟生品组相比,诃子汤组和狼毒大戟诃子汤制品组的粪便含水量、TNF-α和IL-1β的释放水平均显著降低(P<0.01),肠道损伤得到修复。狼毒大戟生品二氯甲烷部位经诃子汤模拟炮制后,二萜类化合物和鞣质酚酸类化合物的离子强度变化率分别为-6.75%~8.09%和66.06%~100.00%。狼毒大戟诃子汤制品二氯甲烷部位二萜类化合物的离子强度变化率为-9.92%~54.72%,无鞣质酚酸类化合物。与空白对照组相比,狼毒大戟生品二氯甲烷部位组和狼毒大戟诃子汤制品二氯甲烷部位组的粪便含水量、TNF-α和IL-1β的释放水平均显著升高(P<0.01),肠道损伤严重。与狼毒大戟生品二氯甲烷部位组相比,狼毒大戟生品二氯甲烷部位诃子汤模拟炮制组的粪便含水量、TNF-α和IL-1β的释放水平显著降低(P<0.01),肠道未见明显损伤。结论诃子汤制能缓和狼毒大戟肠道毒性,其减毒机制可能是狼毒大戟在炮制过程中引入的诃子汤中大量的鞣质酚酸类化合物在动物体内起到了药理拮抗作用。

PI3k/Akt通路在大戟大枣汤抗不同分子表型乳腺癌中的调控作用

目的探讨PI3k/Akt通路在大戟大枣汤(decoction of Euphorbia fischeriana Steud.and jujuba,DEFSJ)抗雌激素受体(ER)阴性(-)和ER阳性(+)乳腺癌中的调控作用,为乳腺癌的针对性治疗提供参考。方法制备DEFSJ提取液,采用UHPLC-Triple Quad仪进行质控分析。DEFSJ含药血清(containing serum,CS)依照体外血清药理学方法进行获取,乳腺癌(ER-)MDA-MB-453和(ER+)MCF-7细胞分别用不同浓度DEFSJ-CS干预48 h。流式细胞术检测细胞周期分布,DNA ladder实验评估细胞凋亡程度,Western blot法检测PI3k/Akt通路相关蛋白表达,实时定量聚合酶链反应(qRT-PCR)法检测FoxO3a、FoxO1a及Bim mRNA表达;激光共聚焦显微镜观察FoxO3a蛋白核转位。结果UPLC对5批DEFSJ提取物进行了分析,结果表明制备工艺可行,质量可控,保证了药理学实验结果的准确性。体外实验中发现,DEFSJ-CS能阻断细胞在G2/M期(P<0.05,P<0.01);DNA ladder实验中呈现典型的细胞凋亡梯带;与阴性对照组比较,DEFSJ-CS能使p-PI3k、p-Akt、p-FoxO3a及p-FoxO1a蛋白表达降低(P<0.05,P<0.01),Bim蛋白表达升高(P<0.05);使FoxO3a、FoxO1a mRNA表达降低(P<0.05,P<0.01),Bim mRNA表达升高(P<0.05,P<0.01);并能使细胞中FoxO3a蛋白呈现显著的核转位变化;且各数据结果均显示DEFSJ-CS对(ER-)MDA-MB-453细胞比对(ER+)MCF-7细胞作用效果更好。结论PI3k/Akt通路参与了大戟大枣汤抗乳腺癌作用的调控,作用效果因乳腺癌表型差异而不同。

A study on population genetic structure of Oryza meyeriana (Zoll. et Mor. ex Steud.) Baill. from Yunnan and its in situ conservation significance

In order to determine genetic diversity of Oryza meyeriana (Zoll. et Mor. ex Steud. ) Baill., 12 enzyme systems encoded by 17 loci were electrophoretically analyzed in 164 individuals of seven populations from Simao Prefecture, Yunnan Province, China. In comparison with those seed plants with the same life history and breeding systems, as well as the other species in the genus Oryza, the species shows rather low levels of genetic diversity (A = 1.1, P = 8.0%, Ho = 0.004 and He = 0. 015) within populations and high genetic differentiation among populations. FST was up to 0. 649, suggesting that 64. 9% of total genetic variability exists among populations. Considering high genetic differentiation among populations from a limited geographic region, most of the populations of the species are worth being protected, and therefore, great natural protection regions should theoretically be established in which a great deal of populations should be involved for developing in situ conservation management.

立枯丝核菌(Rhizoctonia solani)对日本结缕草(Zoysia japonica steud.)的侵染过程研究

【目的】了解立枯丝核菌(Rhizoctonia solani)AG1 IA对日本结缕草(Zoysia japonica steud.)的侵染过程及其引起的病害症状,为进一步从分子水平研究该菌的病理学侵染机制和草坪草抗病分子育种提供理论基础。【方法】通过根部接种法促使立枯丝核菌与日本结缕草无菌苗建立侵染关系,从而对其病叶率、病株率及病情指数进行统计分析,同时结合组织染色透明技术及植物组织石蜡切片对立枯丝核菌的侵染过程、感染方式进行研究。【结果】立枯丝核菌AG1 IA的侵染过程主要为:菌丝吸附在植物组织表面,并沿组织表面定向生长,形成侵染结构——侵染垫与组织建立密切的侵染关系。菌丝通过细胞间隙侵入植物组织内部,主要侵染植物皮层细胞及除木质部导管以外的整个维管束系统。结缕草的地上部分与地下部分组织对立枯丝核菌的侵染显现不同的寄主反应。【结论】立枯丝核菌的侵染过程主要包括吸附、定向生长、渗透、定殖4个部分;立枯丝核菌的侵染主要引起结缕草叶片病症;结缕草病变与菌丝直接侵染无直接联系,表明该菌具有复杂的侵染机制。

臭牡丹调控脊髓N-甲基-D-天冬氨酸受体亚基缓解神经病理性疼痛

目的:探讨臭牡丹(Clerodendrum bungei Steud.,CBS)的镇痛作用是否与N-甲基-D-天冬氨酸(N-methyl-Daspartate,NMDA)受体相关。方法:雄性成年SD大鼠24只,随机分为假手术组(Sham组)、坐骨神经分支选择性损伤(Spared nerve injury,SNI)模型组(SNI组)和30 g·kg^(-1)CBS治疗组(SNI+CBS组)。SNI+CBS组于SNI术后第7 d灌胃给予CBS,持续21 d,Sham组和SNI组给予同等体积的生理盐水灌胃。于术后第26~28 d检测大鼠步态;第28 d取脊髓,qPCR方法检测NMDA受体亚基GluNR1、GluN2A、GluN2B和GluN3A mRNA表达,Western blot和免疫荧光方法检测GluN2A和GluN2B蛋白水平,分子对接方法模拟CBS中主要成分与GluN2B的亲和力。结果:与Sham组相比,SNI模型组大鼠患肢的站立时间、最大接触时的最大强度、足印长度、足印宽度和爪印面积降低,最大接触时间百分比升高,脊髓GluN2A、GluN2B和GluN3A mRNA表达降低,GluN2A和GluN2B蛋白水平升高。与SNI组相比,SNI+CBS组大鼠患肢的站立时间、最大接触时的最大强度、足印长度和足印宽度升高,最大接触时间百分比降低,脊髓GluN2A、GluN2B和GluN3A mRNA表达升高,GluN2A和GluN2B蛋白水平降低。各组GluNR1 mRNA表达差异无统计学意义(P>0.05)。分子对接实验结果显示,原始配体Ro25-6981与GluN2B对接的结合自由能(△G)为−11.72 KJ·mol^(-1),估计抑制常数(Ki)为2.58 nmol;CBS主要成分α-香树脂醇、赪桐酮和木栓酮与GluN2B对接的△G及Ki与Ro25-6981接近,甚至优于Ro25-6981;从对接构象上看,Ro25-6981与木栓酮占据了GluN1B结合位点,α-香树脂醇和赪桐酮则占据了GluN2B结合位点,呈现出较强的NMDA受体抑制作用。结论:CBS对SNI模型所致神经病理性疼痛具有缓解作用,其机制可能是通过抑制NMDA受体来实现。

狼毒大戟化学成分及抗肿瘤活性研究

目的研究狼毒大戟(Euphorbia fischeriana Steud)根部中的化学成分及抗肿瘤活性。方法采用柱层析法、反相色谱法、凝胶色谱法等多种分离手段对中药狼毒根部的乙醇提取部分进行分离,根据波谱数据确定其结构,再根据MTT法对二萜类化合物进行活性筛选,采用流式细胞术分析其促肿瘤细胞的凋亡情况。结果共分离得到16个化合物,包括13个二萜类化合物、2个脂肪酸以及1个简单化合物,分别为3R-ent-1(10),15-rosadien-3-ol(1)、euphebracteolatin B(2)、ent-11α-hydroxyabieta-8(14),13(15)-dien-16,12-olide(3)、fischeriolide B(4)、ebractenoid F(5)、ebraphenol C(6)、fischeria A(7)、euphorin A(8)、ebractenoid S(9)、ent-3,14-dioxo-16-atisene(10)、jolkinolide E(11)、yuexiandajisu F(12)、bisebracteolasin B(13)、(R)-α-(7'Z,10'Z,13'Z)-hexadecatrienoic acid monoglyceride(14)、2,4-二羟基-6-甲氧基-3-醛基苯乙酮(15)、1-O-(9Z,12Z-octadecadienoyl)glycerol(16),其中化合物2和9为首次从该种分离得到。化合物1、13对A549细胞活性显著,化合物1对HCT116、A549细胞株的IC 50分别为25.97、19.82μmol·L^(-1),化合物13对HCT116、A549、HepG-2、SW620细胞株的IC 50分别为12.29、6.73、15.53、18.29μmol·L^(-1)。流式细胞术检测结果表明,随着化合物1浓度的增加,A549细胞系的凋亡率也增加,表明化合物1能够明显促进A549细胞的凋亡。结论狼毒大戟化学成分多样,其中二萜化合物能显著抑制肿瘤细胞的生长。化合物1能以浓度依赖的方式显著诱导肿瘤细胞凋亡且能够明显促进A549细胞的凋亡。

臭牡丹对神经病理性痛大鼠背根神经节N-甲基-D-天冬氨酸受体的影响

目的:探索臭牡丹(Clerodendrum bungei Steud.,CBS)是否通过调控N-甲基-D-天冬氨酸(N-methyl-Daspartate,NMDA)受体缓解坐骨神经分支损伤(Spared nerve injury,SNI)诱导的大鼠神经病理性疼痛。方法:雄性SD大鼠18只,随机分成假手术组(Sham组)、SNI模型组(SNI组)、SNI+CBS治疗组(SNI+CBS组)。各组连续给予30 g·kg^(-1)CBS或等体积生理盐水治疗21 d。PCR方法检测背根神经节(Dorsal root ganglion,DRG)中NMDA受体亚基NR1、GluN2A、GluN2B、GluN3A mRNA表达;Western blot方法检测DRG中GluN2A、GluN2B和IL-10蛋白表达。结果:与Sham组相比,SNI模型大鼠DRG中NR1、GluN2B和GluN3A mRNA表达降低,差异有统计学意义(P<0.05);与SNI组相比,SNI+CBS治疗组NR1、GluN2B和GluN3A mRNA表达升高,各组GluN2A mRNA表达比较差异无统计学意义(P>0.05);与Sham组相比,SNI模型大鼠DRG中GluN2A和GluN2B蛋白水平升高,IL-10蛋白水平下降;与SNI组相比,SNI+CBS组GluN2A和GluN2B降低、IL-10升高,差异均有统计学意义(P<0.05);各组GluN2A的mRNA表达水平差异无统计学意义(P>0.05)。结论:臭牡丹可能通过抑制DRG炎症和调控NMDA受体缓解SNI诱导的大鼠神经病理性疼痛。

狼毒大戟水浸液对金黄色葡萄球菌和大肠杆菌体外杀菌效果的研究

[目的]通过对金黄色葡萄球菌和大肠杆菌的体外药效试验,研究有毒植物狼毒大戟的杀菌效果。[方法]取多年生狼毒大戟的根制成水浸液,用24孔板和平坂培养法对金黄色葡萄球菌和大肠杆菌进行药效试验。[结果]狼毒大戟对全黄色葡萄球菌的最小抑菌浓度(MIC)为0.7 g/ml;最小杀菌浓度(MBC)为1.17 g/ml。对大肠杆菌的最小抑菌浓度(MIC)为1.17 g/ml;最小杀菌浓度(MBC)为1.75 g/ml。[结论]狼毒大戟对金黄色葡萄球菌和大肠杆菌均有明显的抑杀菌作用。

从狼毒大戟中克隆蓖麻烯合成酶基因

本研究采用RACE-PCR技术从狼毒大戟(Euphorbia fischeriana Steud.)根中克隆到一个蓖麻烯合成酶(casbene synthase)基因,命名为EfCS(GenBank登录号为:JN862821)。该基因长1969bp,编码602个氨基酸,具有典型的萜类合成酶的基因结构。对CS基因编码氨基酸序列进行生化特性分析发现其理论等电点为5.36,分子量为69.3648kD。通过疏水性分析,发现CS整体表现为亲水性。进行导肽分析结果发现其具有叶绿体导肽。二级结构预测表明,CS蛋白由α-螺旋、延伸链、β-转角和随意卷曲构成,它们分别占到64.95%、6.64%、3.16%和25.25%。另外,对CS蛋白质进行三级结构预测,发现蓖麻烯合成酶属Ⅰ类萜类合成酶。

狼毒大戟二萜内酯对人癌细胞体外抑制作用的研究

从狼毒大戟中分得的两个二萜内酯化合物:16-hydroxypseudojolkinolide B(化合物Ⅰ)和 jolkino-lide B(化合物Ⅱ),对人红白血病K562细胞及人鼻咽癌CNE2细胞的抑制作用呈明显的量效关系,化合物Ⅰ的IC_(50)与阿霉素相当。