比色法测定固公果根中三萜类成分的含量

【目的】建立固公果根中三萜成分含量的测定方法。【方法】以熊果酸为对照品,以5%香草醛-冰醋酸溶液、高氯酸为显色系统,采用紫外分光光度法在550nm波长处测定样品吸光度。【结果】方法的线性范围为0.046～0.138mg/ml,标准曲线:A=1.566C+0.6012,R=0.9993(n=5),平均回收率为103.45%,RSD=2.75%(n=4),原药材中三萜成分含量为1.93%。【结论】此方法简便,快速,结果准确,可靠,适于固公果根中的三萜成分的质量控制。

云南大花香水月季居群遗传多样性的SSR分析

利用简单重复序列（simple sequence repeat，SSR）分子标记技术对云南省分布的8个大花香水月季天然居群遗传性进行了分析，结果表明：所选用的12对SSR引物，共扩增出72个位点，其中多态性位点70个，占总条带数的97．22％；在物种水平上，总居群的Nei’s基因多样性指数（He）和香农指数（I）分别为0．3012和0．4600，说明云南地区大花香水月季居群的遗传多样性较高；大花香水月季居群内遗传变异（69．49％）大于居群间遗传变异（30．51％），说明居群内变异是其居群的主要变异来源；利用Popgene计算出两两居群间的Nei＇s遗传一致度（I）和遗传距离（D），其范围分别为0．7615～O．9348和0．0674～O．2724，再依据遗传距离进行聚类分析，结果表明居群遗传距离与地理位置无显著的相关性。

基于长尖叶蔷薇与大花香水月季转录组数据的MLO unigenes生物信息学及表达分析

在对长尖叶蔷薇和大花香水月季转录组测序的基础上,利用生物信息学方法,从其转录组数据中共获得23条MLO unigenes并对其进行了分析。结果显示它们之间的氨基酸数量、碱基数、分子量差异较小,多数为疏水性蛋白,平均亲水系数为-0.157~0.190,富含亮氨酸和丝氨酸。亚细胞定位主要分布于质膜中,包含5~9个跨膜结构;二级结构主要由α-螺旋组成。其中,等电点小于7的仅有1条,2条蛋白具有信号肽。这23条MLO蛋白具有15个长度在15~50个氨基酸间的保守基序。它们的系统进化关系分析结果揭示了MLO基因在长尖叶蔷薇与大花香水月季间具有较高的同源性和保守性。将这23条unigenes与来自于月季和拟南芥的MLO基因进行聚类分析,确定了6条可能参与抗白粉病的候选基因,对这6条候选基因进一步分析发现仅有2条unigenes符合MLO型白粉病基因的典型结构特征。最后,通过q RT-PCR试验验证,结果表明:这2条候选基因的相对表达量,在受到白粉病菌侵染后呈积极上调趋势。上述研究结果表明这2条候选基因很可能参与了寄主—白粉病菌的互作过程。

Protective role of fruits of Rosa odorata var. gigantea against WIRSinduced gastric mucosal injury in rats by modulating pathway related to inflammation, oxidative stress and apoptosis

Objective:Rosa odorata var.gigantea is a popular medicinal plant.Some studies have demonstrated that ethanolic extract of the fruits of R.odorata var.gigantea(FOE)has gastroprotective properties.The aim of this study was to investigate the gastroprotective activity of FOE on water immersion restrained stress(WIRS)-induced gastric mucosal injury in a rat model and elucidate the possible molecular mechanisms involved.Methods:A rat stress ulcer model was established in this study using WIRS.After rats were treated with FOE orally for 7 d,the effect of FOE treatment was analyzed by hematoxylin and eosin(H&E)staining,and the changes of inflammatory factors,oxidative stress factors,and gastric-specific regulatory factors and pepsin in the blood and gastric tissues of rats were examined by ELISA assay.Molecular mechanism of FOE was investigated by immunohistochemical assay and Western blot.Results:Compared with the WIRS group,FOE could diminish both the macroscopic and microscopic pathological morphology of gastric mucosa.FOE significantly preserved the antioxidants glutathione peroxidase(GSH-PX),superoxide dismutase(SOD)and catalase(CAT)contents;anti-inflammatory cytokines interleukin-10(IL-10)and prostaglandin E2(PGE2)levels as well as regulatory factors tumor necrosis factor-a(TGF-a)and somatostatin(SS)contents,while decreasing malondialdehyde(MDA),nitric oxide synthase(iNOS),tumor necrosis factor(TNF-a),interleukin-1b(IL-1b),interleukin-6(IL-6),gastrin(GAS)and endothelin(ET)levels.Moreover,FOE distinctly upregulated the expression of Nrf2,HO-1,Bcl2 and proliferating cell nuclear antigen(PCNA).In addition,FOE activated the expression of p-EGFR and downregulated the expression of NF-jB,Bax,Cleaved-caspase-3,Cyto-C and Cleaved-PARP1,thus promoting gastric mucosal cell survival.Conclusion:The current work demonstrated that FOE exerted a gastroprotective activity against gastric mucosal injury induced by WIRS.The underlying mechanism might be associated with the improvement of anti-inflammatory,anti-oxidation and anti-apoptosis systems.

大孔吸附树脂法对固公果根中鞣质的吸附解吸研究

目的探讨大孔吸附树脂富集、纯化固公果中总鞣质的工艺条件参数。方法比较了8种大孔吸附树脂的静态吸附量、静态解吸率,筛选出最佳的吸附树脂。以静态、动态吸附实验相结合,确定了最佳的吸附分离工艺。采用干酪素法进行鞣质的测定。结果在考察的8种树脂中,HP20型树脂具有最佳的吸附参数,并确定了工艺条件。结论本实验筛选出HP20型树脂对固公果根中总鞣质类成分吸附解吸性能较好。