Polysaccharide extract from Rosa laevigata fruit attenuates inflammatory obesity by targeting redox balance and gut interface in high-fat diet-fed rats

Low-molecular-weight polysaccharides(RLPs)extracted from Rosa laevigata fruits showed multiple biofunctions in Asia.This study aimed to investigate its anti-inflammatory obesity effect in high-fat dietfed rats and further elucidated the underlying molecular mechanism by multi-omics methods.The results showed that RLPs administration had significantly restored immune organ indexes and reduced body weight gain.RNA-seq revealed that the effect of RLPs was partially attributed to its regulation on PPARs signaling by increasing the expressions of Scd,Acox3 and Hmgcs2,and on other redox-related pathways by decreasing the expressions of Cyp2 e1,Il1-r1 and Lbp.Moreover,16 S rRNA sequencing coupled with metagenome sequencing showed that RLPs had significantly reduced the ratio of Firmicutes/Bacteroidetes from 8.01 to2.37,and significantly increased the relative abundances of Alistipes,Prevotella,and Akkermansia from 0.36%,1.10%and 2.61%to 0.65%,2.37%and 4.42%,respectively.Spearman correlation analysis result indicated that the abundances of Lachnospiraceae,Prevotella and Bacteroidales were significantly negatively correlated with obesity phenotype,liver function and inflammatory factors.These results revealed that RLPs exerted significant anti-inflammatory obesity property partially via regulation on gut microbiota interface and the redox balance.Therefore,RLPs could be a promising functional food resource with the potential for redox imb alance-related diseases chemoprevention.

RAPD Analysis of Rosa laevigata Michx. from Different Origins

[ Objective] This study aimed to investigate the genetic diversity and phylogenetic relationship of 30 populations of Rosa laevigata Michx. from different origins. [ Method] Using RAPD molecular marker technique, eight effective primers were screened from 35 RAPD random primers for amplification. UPGMA clus- ter analysis was performed using NTSYSpc. ver. 2.02 software. [ Result] A total of 86 loci were amplified using the screened primers, including 84 polymorphic loci, indicating an average polymorphic percentage （PPB） of 97.67%. The similarity coefficients of 30 populations of R. laevigata Michx. ranged from O. 11 to O. 58, and these populations were clustered into groups A, B and C. [ Conclusion ] R. laevigata Michx. exhibits multiple genetic polymorphism. R. laevigata Michx. populations from Guizhou Province have closer genetic relationships.

Exploring the Protective Effect of the Ethanolic Extract of Rosa laevigata Michx.Fruit on Rats with Mesangial Proliferative Glomerulonephritis Based on NLRP3 Inflammasome Pathway

Objective:To investigate the effect of the ethanolic extract of Rosa laevigata Michx.fruit on rats with mesangial proliferative glomerulonephritis based on the NLRP3 inflammasome pathway.Methods:Thirty Wistar rats were divided into three groups,a blank control group,a diabetic nephropathy(DN)model group,and an ethanolic extract intervention group,according to the random number table method,with 10 rats in each group.One day before the experiment,basic feeding was initiated for all the rats;the changes in activity and weight of each group of rats were observed and recorded after 7 d,and a rat model of renal function injury was established after 1 d.Results:Compared with the control group,the model group had significantly higher kidney/body ratio,24 h urine protein,serum creatinine(SCr),blood urea nitrogen(BUN),glomerular mesangial cell(GMC)count,and extracellular matrix(ECM)positive area ratio(P<0.05);the same indicators were significantly lower in the intervention group than in the model group(P<0.05).The NLRP3 inflammasome pathway in renal intrinsic cells was activated in the intervention group.The overactivation of NLRP3 inflammasome is known to promote interleukin(IL)-1βrelease,which was inhibited in the intervention group.Conclusion:The ethanolic extract of Rosa laevigata Michx.fruit has a protective effect on renal intrinsic cells and may be related to NLRP3 inflammasome pathway,suggesting that the fruit of Rosa laevigata Michx.has a potential role in protecting renal intrinsic cells from inflammatory damage.NLRP3 inflammasomes are involved in the development of various chronic inflammatory diseases,such as acute and chronic glomerulonephritis and renal fibrosis.

金樱子(Rosa laevigata Michx.)叶片直接再生不定芽体系的建立

以金樱子组培苗的划伤叶片为外植体,研究了不同植物生长调节剂配比组合、暗培养时间、添加物L-脯氨酸、叶片不同部位对不定芽直接再生的影响。结果表明:当TDZ浓度为1.5 mg·L^-1、NAA浓度为0.000 5 mg·L^-1时,不定芽直接发生率最高,为9.5%;不同暗培养时间对不定芽直接诱导具有一定影响,暗培养时间为10 d时不定芽的直接发生率最高,为10.5%;添加了不同浓度的L-脯氨酸后不定芽的诱导率不增反降,所以以不添加L-脯氨酸为宜;叶片不同部位的再生率比较中,仅带叶叶柄可直接诱导出不定芽。综上所述,叶片直接再生不定芽的诱导方法是,以金樱子带叶叶柄为外植体,在直接诱导培养基上1/2MS+TDA 1.5 mg·L^-1+NAA 0.000 5 mg·L^-1+CH 100 mg·L^-1+AgNO3 10 mg·L^-1+蔗糖30 g·L^-1+琼脂7.5 g·L^-1,暗培养10 d后,转至正常光周期下培养3周左右,不定芽诱导率最高,为10.5%。所得不定芽在增殖培养基MS+NAA 0.1 mg·L^-1+6-BA 1.0 mg·L^-1生长3周后,增殖系数可达到3.5左右;将丛生芽切割成单芽后转入不含任何激素的MS培养基壮苗3周,幼苗可长高至3~5 cm;再转入MS+NAA 0.1 mg·L^-1培养基中生根,1个月后生根率达95%。

The antioxidant activity and hypolipidemic activity of the total flavonoids from the fruit of Rosa laevigata Michx

In the present work, the antioxidant activity in vitro and hypolipidemic activity of the total fla-vonoids (TFs) from the Rosa laevigata Michx fruit was evaluated, and the antioxidant effect in vivo was also discussed. The TFs exhibited a high scavenging effect on 2, 2-diphenyl-1- picrylhydrazyl (?DPPH) with IC50 values 0.01 mg/mL, and a stong reduce power in the test. Hyperli-pemic mice were intragastric administrated with TFs (25, 50 mg/kg/day) for 4 weeks, and fenofi-brate was used as the positive reference sub-stance. After the experiment, the levels of TC (total cholesterol), TG (triglyceride), LDL- C (low density lipoprotein-cholesterol) of the mice ad-ministrated with high-dose of TFs were mark-edly declined by 45.02%, 33.86% and 73.68%, re-spectively, while HDL-C (high density lipopro-tein-cholesterol) was significantly increased com-pared with model group. To investigate the hepatoprotective effect, histopathological assay, ALT (alanine aminotransferase), AST (aspartate aminotransefrase) and ALP (alkaline phosphatase) were also studied, and the results showed that TFs exhibited a favorable effect on liver protec-tion, of which the levels of ALT, AST and ALP were elevated by 55.85%, 29.15% and 25.68%, respectively. Furthermore, the TFs could sig-nificantly decrease the MDA (malondialdehyde) level and improve the levels of CAT (Catalas), SOD (superoxide dismutase), GSH (reduced glutathione), and GPX (glutathione peroxidase) compared with hyperlipemia mice. Our results suggested that TFs has a high antioxidant ac-tivity and hypolipidemic activity, which can be used as a potential medicine for cardiovascular diseases.

Study on Thin Layer Drying of <i>Rosa laevigata</i>Michx

The drying process of traditional Chinese medicine Rosa laevigata Michx was investigated in a laboratory scale dryer. Drying experiments were conducted at five temperatures of 40℃, 50℃, 60℃, 70℃ and 80℃. The experimental data were fitted to ten different thin layer drying models to select a suitable model for describing the drying process of Rosa laevigata Michx fruits. The results showed that the Midilli model had the highest value of R2 (0.999767), the lowest χ2 (0.000034) and RMSE (0.003616) among the ten models considered. The drying process of Rosa laevigata Michx fruits consisted of 1st falling rate period and 2nd falling rate period. The effective moisture diffusivity was found in the range of 1.49 - 30.20 × 10-11 m2·s-1. The value of activation energy obtained by plotting lnD versus 1/T is about 36 kJ·mol-1.

Network pharmacology research and experimental verification of Huangqi(Astragalus Radix)and Jinyingzi(Rosae Laevigatae Fructus)in treating benign prostatic hyperplasia

Objective This study aimed to analyze the mechanism of action of Huangqi(Astragalus Radix,HQ)-Jinyingzi(Rosae Laevigatae Fructus,JYZ)in the treatment of benign prostatic hyperplasia(BPH)based on network pharmacology and to verify the prediction through animal experimentation.Methods Based on the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(TCMSP),Bioinformatics Analysis Tool for Molecular mechANism of Traditional Chinese Medicine(BATMAN-TCM)databases,and literature,the active components and related target genes of HQ and JYZ were screened.The BPH target genes were screened based on the DisGeNET and GeneGards databases,and Excel was used to merge and remove duplicates.The Perl language was used to obtain drug-BPH target genes by intersecting shared target genes.A drug-component-target gene network diagram was constructed using Cytoscape software.The drug-BPH intersection target genes were inputted into the STRING database,and the key target genes were selected according to the degree algorithm.The output formed the basis for Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses to determine the potential mechanism of HQ and JYZ in BPH treatment.High,medium,and low doses of HQ and JYZ extract were used to intervene in BPH rats,and then the prostate volume,wet weight,and prostate index of the BPH rats were determined.Changes in prostate histopathology and microvessel density(MVD)were evaluated using immunohistochemistry,and the optimal HQ and JYZ extract dose was confirmed.Finally,the optimal dose was used to intervene in a BPH rat model,and AKT1 and VEGF expressions were examined by immunohistochemistry.Results Based on network pharmacology,33 active components and 772 target genes were identified from HQ and JYZ,along with 817 BPH target genes and 112 drug-BPH common target genes.Among them were 10 key target genes,including AKT1,JUN,MAPK1,IL-6,TNF,ESR1,and VEGFA.KEGG enrichment analysis revealed 135 signaling pathways,including PI3K/AKT,IL-17,TNF,p53,MAPK,VEGF,JAK-STAT,and NF-κB pathways.The animal experiment showed that HQ and JYZ significantly improved prostate volume,wet weight,prostate index,and prostate histopathology of BPH rats,reducing MVD.In addition,HQ and JYZ inhibited the expression of AKT1 and VEGF in the prostate tissue of rats,promoted epithelial cell apoptosis,and inhibited angiogenesis,consistent with the prediction.Conclusion The combination of HQ and JYZ is effective for BPH therapy through multi-compound and multi-target collaboration.Its possible mechanism in treating BPH includes regulation of AKT1,VEGF protein,PI3K/Akt,and VEGF signaling pathways related to apoptosis,angiogenesis,and inflammation,with potential for clinical use and research.

The Study on the Action Mechanism of the Jinyingzi(Rosae Laevigatae Fructus)–Qianshi(Euryales Semen)Couplet Herbs on Membranous Nephropathy Based on Network Pharmacology

Objective Our objective was to explore the action mechanism of the Jinyingzi(Rosae Laevigatae Fructus)–Qianshi(Euryales Semen)couplet herbs in the treatment of membranous nephropathy(MN)based on network pharmacology.Methods The active ingredients and targets of Jinyingzi(Rosae Laevigatae Fructus)and Qianshi(Euryales Semen)were screened by systematic pharmacology database and analysis platform.Online Human Mendelian Genetic database and GeneCards database were used to retrieve MN-related targets.The active ingredient-related targets and MN disease targets were introduced into Venny 2.1,and Wayne diagram was drawn.The intersection targets were the potential targets of the Jinyingzi(Rosae Laevigatae Fructus)–Qianshi(Euryales Semen)couplet herbs in the treatment of MN.The protein interaction network of potential targets was constructed,and the core targets were screened with String platform.Metascape platform was used for functional enrichment analysis of gene ontology(GO)and pathway enrichment analysis of Kyoto Encyclopedia of Genes and Genomes(KEGG).The“herb-active ingredient-target-pathway”networks were drawn by using Cytoscape software,and the key components,targets,and signaling pathways were screened.Results A total of 8 active ingredients and 193 related targets in Jinyingzi(Rosae Laevigatae Fructus)and Qianshi(Euryales Semen)were screened out;a total of 1,621 targets of MN disease and 105 potential targets for the treatment of MN were obtained in the treatment with Jinyingzi(Rosae Laevigatae Fructus)–Qianshi(Euryales Semen)couplet herbs;40 core targets were screened by protein–protein interaction network topology analysis;a total of 1,978 results were obtained by GO function enrichment analysis,and 206 signal pathways were obtained by KEGG pathway enrichment analysis and screening.The network topology analysis of“herb-active ingredient-target-pathway”showed that the key components included quercetin,kaempferol,β-sitosterol,etc.;the key targets included protein kinase Bα(AKT),mitogen-activated protein kinase 1(MAPK1),B-cell lymphoma-2(BCL2),prostaglandin-endoperoxide synthase 2(PTGS2),etc.;the key pathways included advanced glycation end product/receptor of AGE signaling pathway,phosphatidyl inositol 3-kinase(PI3K)/AKT signaling pathway,MAPK signaling pathway,hypoxia-inducible factor-1 signaling pathway,Ras signaling pathway,nuclear factor kappa-B(NF-κB)signaling pathway,Toll-like receptors signaling pathway,p53 signaling pathway and vascular endothelial growth factor signaling pathway in the late stage of diabetic complications.Conclusion The Jinyingzi(Rosae Laevigatae Fructus)–Qianshi(Euryales Semen)couplet herbs can regulate PI3K/AKT,MAPK,NF-κB signaling pathways in MN by targeting proteins of AKT1,MAPK8,PTGS2 through key components of quercetin,β-sitosterol,and kaempferol,so as to inhibit the overexpression of inflammatory factors in renal tissues,regulate inflammatory response,and improve renal function.

金樱子叶衍生碳点的制备及其对金樱子不定芽的影响

为了探讨碳点对植物组织培养的影响,本论文以金樱子叶为碳源,采用一步水热法制备荧光碳点(JCDs),再以金樱子茎段为外植体建立再生体系,研究J-CDs对金樱子不定芽生长的影响。结果表明,J-CDs生物相溶性好,在pH值2-8范围内保持稳定,适用于植物组织培养。添加J-CDs可以促进金樱子不定芽生长,实验组金樱子不定芽株高比对照组高3-4倍,植株健壮,枝叶伸展,生长良好。当J-CDs浓度为0.9mg·mL^(-1)时,金樱子不定芽叶绿素总含量和可溶性蛋白含量达到最大值,SOD和POD酶活性最大,分别比对照组增加了56.25%和41.82%。本研究利用金樱子生物质制备荧光CDs,促进金樱子不定芽生长,为植物繁育提供了新方法。

基于NLRP3通路研究金樱子抑制肾小管上皮细胞间质化治疗糖尿病肾病的作用机制

[目的]研究金樱子对糖尿病肾病(DN)模型小鼠的治疗效果及基于核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)信号通路抑制肾小管上皮细胞间质化(EMT)的作用机制。[方法]通过链脲佐菌素(STZ)联合高脂饮食诱导建立DN小鼠模型,并灌胃不同剂量的金樱子。通过检测各组小鼠体肌酐(Cr)、尿素氮(BUN)、24 h尿蛋白,肾石蜡切片苏木精-伊红(HE)染色及过碘酸-Schiff(PAS)染色评估金樱子对DN模型小鼠的治疗作用;通过检测上皮性钙黏附蛋白(E-CDH)、波形蛋白(VIM)、α-平滑肌肌动蛋白(α-SMΑ)和转化生长因子β(TGF-β)mRNA和蛋白表达水平研究金樱子对DN小鼠EMT的影响;通过检测NLRP3、凋亡相关斑点样蛋白(ASC)、活化的半胱氨酸天冬氨酸蛋白酶1(cleaved Caspase-1)、成熟的白细胞介素-1β(mature IL-1β)、成熟的白细胞介素-18(mature IL-18)的蛋白水平评估金樱子对DN小鼠NLRP3信号通路的影响。[结果]金樱子可明显降低DN小鼠Cr、BUN及24 h尿蛋白水平;同时改善DN模型小鼠肾组织病理学变化,提示金樱子对DN模型小鼠具有治疗作用;进一步研究发现金樱子提升了E-CDH,降低了VIM、α-SMΑ和TGF-βmRNA和蛋白水平,改善了DN小鼠的EMT;降低了NLRP3、ASC、cleaved-Caspase-1、mature IL-1β、mature IL-18蛋白水平,提示金樱子干预降低了DN小鼠NLRP3信号通路的活化程度。[结论]金樱子对DN模型小鼠具有治疗作用,其作用机制可能与通过降低NLRP3信号通路活化抑制EMT有关。

金樱子多糖、车前子多糖和冬葵果多糖体内外抗炎效果比较

旨在对比金樱子多糖、冬葵果多糖、车前子多糖的体内外抗炎活性。体外试验用脂多糖(LPS)诱导小鼠RAW264.7细胞构建炎症模型,分别加入金樱子多糖、车前子多糖、冬葵果多糖,以MTT法检测其对RAW264.7细胞活力的影响,Griess法检测LPS诱导的细胞上清液中NO含量,ELISA检测白细胞介素6(IL-6)、白细胞介素1β(IL-1β)和α肿瘤坏死因子(TNF-α)含量,RT-PCR法检测炎症细胞因子TNF-α、IL-6、IL-1β的mRNA表达量;体内试验用葡聚糖硫酸钠(DSS)构建小鼠溃疡性结肠炎模型,同时多糖组和阳性药组的小鼠分别灌服多糖(200 mg/kg)和5-氨基水杨酸(200 mg/kg),空白组和DSS组灌服生理盐水,采用ELISA检测结肠组织中炎症因子TNF-α、IL-6、IL-1β的浓度,以结肠长度、组织病理学评分比较结肠组织病理变化。体外试验结果发现:在同一浓度下,与模型组(LPS)相比,对炎性介质(NO、TNF-α、IL-6、IL-1β)含量和促炎细胞因子(TNF-α、IL-6、IL-1β)的mRNA表达量抑制作用以金樱子多糖组最高,车前子多糖组次之,而冬葵果多糖组抑制作用不明显;体内试验结果发现:与DSS组相比,金樱子多糖组的疾病活动指数(DAI)显著降低(P<0.05),结肠长度极显著增加(P<0.01),组织病理学评分和结肠组织中TNF-α、IL-6、IL-1β水平极显著降低(P<0.001),结肠组织中IL-10水平极显著升高(P<0.001),其次是车前子多糖组的结肠长度显著增加(P<0.05),组织病理学评分和结肠组织中TNF-α、IL-1β水平显著降低(P<0.05),结肠组织中IL-6水平极显著降低以及IL-10水平极显著升高(P<0.01),而冬葵果多糖组的指标变化不明显。试验结果表明,与车前子多糖和冬葵果多糖相比,金樱子多糖在体内外的抗炎效果最佳,可以作为多糖类抗炎剂的候选药。

基于活性指导的金樱子果实三萜类化合物分离研究

研究了金樱子果实中三萜成分以及抗阿尔茨海默病(AD)的活性。以神经细胞保护活性指导分离,利用硅胶、ODS及反相HPLC等柱色谱方法进行分离纯化,并利用核磁共振波谱方法进行结构鉴定。结果表明:分离的8个三萜类化合物对AChE靶蛋白有高度亲和力,并得到直接靶酶实验验证,其抑制率接近阳性药,表明金樱子三萜类成分具有抗AD活性。

金樱子果实中蔷薇酸的快速富集方法及活性研究

金樱子果实中富含一种5环三萜类活性成分——蔷薇酸(EA),这是一种重要的天然产物,因其多样的药理活性而被广泛研究。由于传统的分离纯化工艺效率低、耗时长,因此亟需一种方便快捷的方法提高EA的富集效率。通过一种自制的减压真空柱色谱装置对金樱子果实中富含的蔷薇酸进行富集,该方法不仅省时省力,极大提高了EA的富集效率,同时也为其他天然活性成分的快速富集提供了一种真实有效的方法。此外,对EA进行分子对接,发现它与乙酰胆碱酯酶(AChE)活性位点的结合能为-36kJ·mol^(-1),具有高度亲和力;对EA进行乙酰胆碱酯酶活性研究,发现在质量浓度为120μg·mL^(-1)时,EA和阳性药加兰它敏对AChE的抑制活性分别可达83.20%和92.91%,这意味着EA具有抗阿尔兹海默症的潜在活性。

金樱子叶的化学成分研究

采用大孔树脂色谱、ODS色谱、凝胶色谱等现代色谱分离技术对金樱子叶的75%乙醇提取物进行分离纯化,根据理化性质和波谱数据鉴定化学结构。从金樱子叶75%乙醇提取物中分离得到了8个化合物,分别鉴定为3-氧-α-紫罗兰醇-β-D-吡喃葡萄糖苷(1)、7,8-二氢-3-氧-α-紫罗兰醇-β-D-吡喃葡萄糖苷(2)、9-hydroxymengastigman-5-en-4-one-O-primeveroside(3)、4-氧-β-紫罗兰醇-β-D-吡喃葡萄糖苷(4)、7,8-二氢-4-氧-β-紫罗兰醇-β-D-吡喃葡萄糖苷(5)、甲基间苯三酚-β-D-吡喃葡萄糖苷(6)、没食子酸乙酯(7)、对羟基肉桂酸乙酯(8),化合物1、2、3、5为首次从蔷薇属植物中分离得到。研究金樱子叶的化学成分,为进一步阐明其药理机制奠定基础。

金樱子和鸡内金对饲高糖高脂兔血中糖、脂和胰岛素水平的影响

观察金樱子和鸡内金对实验性高糖高脂兔的降糖降脂作用及胰岛素含量的影响。用糖脂颗粒饲料 (含蔗糖 37%、猪油 10 %、基础饲料 5 3% ,简称糖脂饲料 )饲养新西兰大耳白兔。正常组 4只饲以普通饲料 ;对照组 7只喂饲糖脂饲料 ;治疗组 7只喂饲糖脂饲料 135d后 ,糖脂饲料中加金樱子 5 0g (kg·d) ,鸡内金 2 7g (kg·d) ,2 5d为一个疗程 ,共 2个疗程。葡萄糖氧化酶法检测葡萄糖 ,甘油三酯磷酯酶法检测甘油三酯 ,放射免疫法检测胰岛素。数据用SPSS 10 .0统计软件进行重复测量数据的方差分析。实验前组间比较 ,葡萄糖、甘油三酯、胰岛素无差异。饲以糖脂饲料 135d后 ,对照组、治疗组与正常组比较 ,葡萄糖、甘油三酯都升高 (P <0 .0 5 ) ,胰岛素变化无统计学意义 (P >0 .0 5 )。加金樱子和鸡内金治疗 2个疗程后 ,治疗组与对照组比较 ,葡萄糖、甘油三酯都降低 (P <0 .0 5 ) ,胰岛素无显著性差异 (P >0 .0 5 )。提示金樱子和鸡内金有降葡萄糖、甘油三酯的作用 。

药食两用金樱子的研究进展

金樱子可药食两用,其有效成分具有生物活性和保健功效。本文对金樱子的化学成分、提取、分离、生物活性、质量控制和产品开发等的研究进展进行综述,并分析目前金樱子研究中存在的问题,旨在为金樱子功能性食品的生产、药用的研究和资源的综合利用提供理论依据。

不同澄清剂对金樱子发酵果酒澄清效果的影响

以果胶酶、明胶、膨润土、壳聚糖四种澄清剂单一或者复合使用的处理方法对金樱子发酵果酒进行澄清处理,测定了金樱子果酒澄清处理前后的透光率、酒精度、总糖、总酸以及相应感官评价等指标。实验结果表明:以复合澄清剂澄清效果最佳,即明胶0.02g/L、膨润土1.2g/L和壳聚糖0.4g/L,经澄清处理后,果酒的理化性质变化小,酒精度为14.2%vol,总糖4.5g/L,总酸2.8g/L,透光率96.5%,处理后的果酒呈宝石光泽,果香、酒香良好、酒体醇厚,典型优雅。

金樱子多糖的抗氧化作用

目的 :探讨金樱子多糖 (PRL)体外抗氧化作用。方法 :邻苯三酚自氧化法测定PRL清除超氧阴离子自由基效果 ;比色法测定PRL对羟自由基诱导红细胞溶血、脂质过氧化反应的影响。结果 :PRL能显著清除超氧阴离子自由基、抑制羟自由基对细胞膜的破坏而引起的溶血和脂质过氧化产物的形成。结论 :PRL具有显著的抗氧化作用。

大孔树脂柱层析法纯化金樱子总黄酮的初步研究

目的:研究AB-8大孔树脂纯化金樱子总黄酮的工艺条件。方法:用70%乙醇提取金樱子中黄酮类化合物,得到粗黄酮粉,利用分光光度法测定样品中的黄酮含量。以AB-8型大孔吸附树脂对金樱子黄酮提取液的吸附为研究对象,对影响AB-8型大孔树脂动态吸附与解吸金樱子黄酮的各种因素进行了初步研究。结果:其最佳工艺为样液浓度0.3 mg/ml,上样量为120 mg、以1 ml/min吸附速率进行吸附,5BV的70%乙醇、1 ml/min的流速进行洗脱效果最佳。粗黄酮粉的黄酮含量为25.2%,经AB-8型大孔吸附树脂纯化后的金樱子精黄酮粉中黄酮的含量达42.2%。结论:AB-8大孔吸附树脂对金樱子黄酮有一定的纯化效果。

金樱子多糖的分离纯化及组成分析

对金樱子多糖的分离纯化方法作了探讨 ,筛选出了较佳的工艺条件 ,通过紫外分光光度法 ,红外光谱以及气相色谱法分别对金樱子多糖纯品LP2 的纯度、分子构型、单糖组成进行了分析 ;并通过了DEAE—纤维素 (氯型 )