Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharide...Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharides. Comprehensive evaluation was carried out by linear relationship,precision,reproducibility,stability and recovery rate. The results showed that the linear relationship between glucose concentration and absorbance was good when glucose concentration was0-40 μg/ml,and the average recovery rate was equal to or higher than 97. 00% with good reproducibility( RSD 〈 1. 60%,n = 5). It revealed that the two methods were accurate and reliable,and suitable for the determination of polysaccharide content in the shoots of A. elata. Polysaccharide content detected by sulfuric acid-phenol and sulfuric acid-anthrone methods was 19. 31% and 20. 40% respectively.展开更多
Aim Aralia elata (Miq.) Seem is a medicinal plant with a variety of biological activities. Several trier- pene saponins extracted from the leaves of Aralia elata (Miq.) Seem possess potent cytotoxic activity, but ...Aim Aralia elata (Miq.) Seem is a medicinal plant with a variety of biological activities. Several trier- pene saponins extracted from the leaves of Aralia elata (Miq.) Seem possess potent cytotoxic activity, but the mechanisms remain unclear. Methods In the present study, we examined the anti-tumor activity of total saponins of Aralia elata (Miq.) Seem leaves (TSAESL) using both in vitro and in vivo experiments, and investigated the underlying molecular mechanisms. Results Briefly, TSAESL significantly inhibited the proliferation of five human cancer cell lines and induced apoptosis of MCF-7 cells in a concentration-dependent manner. TSAESL also in- creased the expression level of active caspase-3 and cleaved PARP. In addition, TSAESL dramatically activated the phosphorylation of ERK1/2, p38 and JNK in a concentration-dependent manner. Treatment with the ERK1/2 in- hibitor U0126, p38 inhibitor SB203580, or JNK inhibitor SP600125 prior to TSAESL exposure markedly attenuated TSAESL-induced phosphorylation of ERK1/2 and p38. In mice bearing MCF-7 xenografl, TSAESL markedly inhib- ited tumor growth without significantly affecting spleen coefficient and hematological parameters. Conclusion These results strongly suggest that TSAESL has anti-tumor effect via activating the MAPK-mediated signaling path- ways.展开更多
植物多向耐药性(Pleiotropic drug resistance,PDR)蛋白属于三磷酸腺苷结合盒(ATP-binding cassette,ABC)转运蛋白ABCG亚族,在植物次生代谢产物转运特别是萜类物质跨膜转运中发挥重要作用。基于辽东楤木全基因组测序鉴定出21个PDR转运蛋...植物多向耐药性(Pleiotropic drug resistance,PDR)蛋白属于三磷酸腺苷结合盒(ATP-binding cassette,ABC)转运蛋白ABCG亚族,在植物次生代谢产物转运特别是萜类物质跨膜转运中发挥重要作用。基于辽东楤木全基因组测序鉴定出21个PDR转运蛋白,且主要为细胞膜蛋白,该基因在12对染色体上均有分布,其中5号染色体上分布较多。共线性分析结果表明,部分PDR基因在进化过程中发生基因串联复制事件,并可能存在基因多拷贝扩增现象。基因结构分析结果表明,17个基因含有PDR基因特有结构域,且启动子上含有多种激素和非生物胁迫响应相关顺式作用元件。组织特异性表达模式分析结果表明,PDR基因主要在辽东楤木叶片中高表达。为筛选与辽东楤木三萜皂苷转运相关的PDR转运蛋白,对基因编码区序列、蛋白结构、跨膜螺旋等进行分析,初步筛选出7个结构完整的PDR转运蛋白。进一步通过系统进化分析、基因表达与皂苷含量的关联分析筛选出2个可能与楤木皂苷转运相关的PDR基因(AE02G00218和AE12G01725)。两个基因均受外源激素MeJA、SA和机械损伤诱导上调表达。以上研究为萜类物质转运相关蛋白鉴定与功能研究提供新思路和基因资源。展开更多
目的探讨龙芽楤木总皂苷[total aralosides of aralia elata(Miq)seem,TASAES]对实验性糖尿病(DM)大鼠肾脏功能及结构保护作用的机制。方法应用链脲佐菌素(STZ)复制DM大鼠模型,于8 w时对正常对照组、模型组、不同剂量TASAES治疗组(低、...目的探讨龙芽楤木总皂苷[total aralosides of aralia elata(Miq)seem,TASAES]对实验性糖尿病(DM)大鼠肾脏功能及结构保护作用的机制。方法应用链脲佐菌素(STZ)复制DM大鼠模型,于8 w时对正常对照组、模型组、不同剂量TASAES治疗组(低、中、高剂量组)DM大鼠进行尿量、肾重体重比、24 h尿微量自蛋白(mALB)测定;RT-PCR技术检测结缔组织生长因子(CTGF)在核酸水平上的转录情况;电镜观察超微结构变化。结果与正常对照组比较,8 w时模型组、低、中、高剂量TASAES组大鼠尿量、相对肾重/体重比、24 h mALB明显增加(P<0.05,P<0.01);与模型组大鼠比较,低、中、高剂量TASAES组大鼠相对肾重/体重比,24 h mALB下降(P<0.05),而血肌酐虽无明显变化,但有上升趋势;与模型组比较,中、高剂量TASAES组CTGF在分子水平表达差异有显著性(P<0.01);电镜显示:模型组肾基底膜增厚,厚薄不均,上皮细胞内线粒体空化,低、中、高剂量TASAES组明显减轻。结论龙芽楤木能有效降低DM大鼠尿微量白蛋白含量;降低CTGF在肾脏的表达;改善肾脏超微结构,防止基底膜增厚,保护肾小球滤过屏障。展开更多
基金Supported by Scientific Research Project of Education Department of Liaoning Province,China(L2017lkyfwdf-05)Public Welfare Fund Project of Department of Science and Technology of Liaoning Province,China(2016003003)
文摘Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharides. Comprehensive evaluation was carried out by linear relationship,precision,reproducibility,stability and recovery rate. The results showed that the linear relationship between glucose concentration and absorbance was good when glucose concentration was0-40 μg/ml,and the average recovery rate was equal to or higher than 97. 00% with good reproducibility( RSD 〈 1. 60%,n = 5). It revealed that the two methods were accurate and reliable,and suitable for the determination of polysaccharide content in the shoots of A. elata. Polysaccharide content detected by sulfuric acid-phenol and sulfuric acid-anthrone methods was 19. 31% and 20. 40% respectively.
文摘Aim Aralia elata (Miq.) Seem is a medicinal plant with a variety of biological activities. Several trier- pene saponins extracted from the leaves of Aralia elata (Miq.) Seem possess potent cytotoxic activity, but the mechanisms remain unclear. Methods In the present study, we examined the anti-tumor activity of total saponins of Aralia elata (Miq.) Seem leaves (TSAESL) using both in vitro and in vivo experiments, and investigated the underlying molecular mechanisms. Results Briefly, TSAESL significantly inhibited the proliferation of five human cancer cell lines and induced apoptosis of MCF-7 cells in a concentration-dependent manner. TSAESL also in- creased the expression level of active caspase-3 and cleaved PARP. In addition, TSAESL dramatically activated the phosphorylation of ERK1/2, p38 and JNK in a concentration-dependent manner. Treatment with the ERK1/2 in- hibitor U0126, p38 inhibitor SB203580, or JNK inhibitor SP600125 prior to TSAESL exposure markedly attenuated TSAESL-induced phosphorylation of ERK1/2 and p38. In mice bearing MCF-7 xenografl, TSAESL markedly inhib- ited tumor growth without significantly affecting spleen coefficient and hematological parameters. Conclusion These results strongly suggest that TSAESL has anti-tumor effect via activating the MAPK-mediated signaling path- ways.
文摘植物多向耐药性(Pleiotropic drug resistance,PDR)蛋白属于三磷酸腺苷结合盒(ATP-binding cassette,ABC)转运蛋白ABCG亚族,在植物次生代谢产物转运特别是萜类物质跨膜转运中发挥重要作用。基于辽东楤木全基因组测序鉴定出21个PDR转运蛋白,且主要为细胞膜蛋白,该基因在12对染色体上均有分布,其中5号染色体上分布较多。共线性分析结果表明,部分PDR基因在进化过程中发生基因串联复制事件,并可能存在基因多拷贝扩增现象。基因结构分析结果表明,17个基因含有PDR基因特有结构域,且启动子上含有多种激素和非生物胁迫响应相关顺式作用元件。组织特异性表达模式分析结果表明,PDR基因主要在辽东楤木叶片中高表达。为筛选与辽东楤木三萜皂苷转运相关的PDR转运蛋白,对基因编码区序列、蛋白结构、跨膜螺旋等进行分析,初步筛选出7个结构完整的PDR转运蛋白。进一步通过系统进化分析、基因表达与皂苷含量的关联分析筛选出2个可能与楤木皂苷转运相关的PDR基因(AE02G00218和AE12G01725)。两个基因均受外源激素MeJA、SA和机械损伤诱导上调表达。以上研究为萜类物质转运相关蛋白鉴定与功能研究提供新思路和基因资源。
文摘目的探讨龙芽楤木总皂苷[total aralosides of aralia elata(Miq)seem,TASAES]对实验性糖尿病(DM)大鼠肾脏功能及结构保护作用的机制。方法应用链脲佐菌素(STZ)复制DM大鼠模型,于8 w时对正常对照组、模型组、不同剂量TASAES治疗组(低、中、高剂量组)DM大鼠进行尿量、肾重体重比、24 h尿微量自蛋白(mALB)测定;RT-PCR技术检测结缔组织生长因子(CTGF)在核酸水平上的转录情况;电镜观察超微结构变化。结果与正常对照组比较,8 w时模型组、低、中、高剂量TASAES组大鼠尿量、相对肾重/体重比、24 h mALB明显增加(P<0.05,P<0.01);与模型组大鼠比较,低、中、高剂量TASAES组大鼠相对肾重/体重比,24 h mALB下降(P<0.05),而血肌酐虽无明显变化,但有上升趋势;与模型组比较,中、高剂量TASAES组CTGF在分子水平表达差异有显著性(P<0.01);电镜显示:模型组肾基底膜增厚,厚薄不均,上皮细胞内线粒体空化,低、中、高剂量TASAES组明显减轻。结论龙芽楤木能有效降低DM大鼠尿微量白蛋白含量;降低CTGF在肾脏的表达;改善肾脏超微结构,防止基底膜增厚,保护肾小球滤过屏障。