A new natural product (1) together with 26 know compounds were isolated from the Bulbs of Ornithogalum caudatum. Their structures were established on the basis of spectral analyses as n-butyl pyroglutamate (1), nonade...A new natural product (1) together with 26 know compounds were isolated from the Bulbs of Ornithogalum caudatum. Their structures were established on the basis of spectral analyses as n-butyl pyroglutamate (1), nonadecyl alcohol(2), eicosanol(3), behenic acid(4), b-sitosterol(5), stigmasterol(6), glycerol 1-monocerotate(7), pyrocatechol(8), p-ethoxybenzoic acid(9), p-coumarinic acid(10), protocatechuric acid(11), ursolic acid(12), betulinic acid(13), fumaric acid(14), succinic acid(15), uracil(16), xanthine(17), quercetin(18), kaempferol (19), isorham-netin(20), adenosine(21), daucosterol(22), stigmasterol 3-O-b-D-glucopyranoside(23), quercetin 3-O-b-D-glucopyra-noside(24), kaempferol 3-O-b-D-glucopyranoside(25), rutin(26), and kaempferol 3-O-b-rutinoside(27). All of them, except compound 5, were isolated from this plant for the first time.展开更多
A water soluble crude extract prepared from Ornithogalum caudatum Ait. (OCA) showing a high immunomodulating activitiy was isolated and characterized by virtue of gel filtration and column chromatography. The pre...A water soluble crude extract prepared from Ornithogalum caudatum Ait. (OCA) showing a high immunomodulating activitiy was isolated and characterized by virtue of gel filtration and column chromatography. The presence of the monosaccharides has been established by the chemical analysis. The quantitative analysis of the alditol acetate derivatives of them showed the ratios of the monosaccharides analyzed by means of GC respectively. The concentrations of protein(280 nm) and carbohydrate(496 nm) were detected respectively. The information of the molecular weight from the pure polysaccharide was obtained by several standard Dextrans from the Sephadex chromatography.展开更多
<span style="font-family:Verdana;">A simple method for assessment of the toxicity and antidote effect of selenium nanoparticles with </span><i><i><span style="font-family:Verd...<span style="font-family:Verdana;">A simple method for assessment of the toxicity and antidote effect of selenium nanoparticles with </span><i><i><span style="font-family:Verdana;">Paramecium</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i><span style="font-family:Verdana;"> is presented. Light microscopy in combination with computerized video tracking is employed for </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">determination of </span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">survival time of <i></i></span><i><i><span style="font-family:Verdana;">P.</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i></span><span style="font-family:Verdana;">. Up to 800 mg/L, selenium nanoparticles are not acutely toxic. </span><span style="font-family:Verdana;">With</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> respect to a potential antidote effect, the lethality of silver nanoparticles, silver nitrate, sodium hydrogen selenite, and sodium selenite to <i></i></span><i><i><span style="font-family:Verdana;">P.</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i></span><span style="font-family:Verdana;"> was decreased and survival time was extend</span><span style="font-family:Verdana;">ed upon pre-treatment with selenium nanoparticles. Taken together, these findings suggest that administration of selenium nanoparticles attenuates</span><span style="font-family:Verdana;"> exposure </span><span style="font-family:Verdana;">to</span><span style="font-family:Verdana;"> toxicants. Selenium nanoparticles could be a good functional additive for food management in animals.</span>展开更多
OBJECTIVE To investigate toll-like receptor 4(TLR4)-related the regulation of Ornithogalum caudatum extract(OCE) on inflammatory responses in lipopolysaccharide(LPS) activated macro.phages.METHODS Primary peritoneal m...OBJECTIVE To investigate toll-like receptor 4(TLR4)-related the regulation of Ornithogalum caudatum extract(OCE) on inflammatory responses in lipopolysaccharide(LPS) activated macro.phages.METHODS Primary peritoneal macrophage,Raw 264.7,and THP-1 were incubated in 96-well plate for 24 h and treated with OCE of the concentration of 0-400 μg/ml for 4 h.The viability of cells was measured by MTT assay.Specific concentrations of OCE were added into the medium of primary peri.toneal macrophage,Raw 264.7,and THP-1,respectively,then following with lipopolysaccharides(LPS).Cells were harvested and the total cellular protein and nuclear protein were extracted,and the protein content was determined using BCA protein assay Kit.The expressions of TLR4,inducible nitric oxide synthase(iNOS),cyclooxygenase 2(COX-2),α-inhibitor of NF-κB(IκB-α) and nuclear factor-κB(NF-κB) were assayed by Western blot.The expressions of interleukin-1α(IL-1α),interleukin-1β(IL-1β),interleukin-18(IL-18),and tumor necrosis factor-α(TNF-α) were measured by RT-PCR.RESULTS The results of MTT showed that OCE has no cytotoxicity in Raw 264.7 cells between 1.56 μg/ml and 400 μg/ml.Compared with normal group,the expressions of TLR4,iNOS,COX-2,NF-κB and IL-1α,IL-1β,IL-18,TNF-α,the level of nitric oxide(NO) were significantly increased by LPS stimulation,while OCE pretreat.ment reduced these increase induced by LPS.However,OCE pretreatment reversed the reduction of IκB-α after LPS stimulation.CONCLUSION OCE might suppress TLR4 expression and block the inflamma.tion process of NF-κB and iNOS,further decrease the expression of COX-2 and inhibit the release of inflammatory factors.展开更多
目的:建立HPLC法同时测定不同产地小槐花茎与叶中牡荆素、斯皮诺素、当药黄素、山柰酚含量的分析方法。方法:分析采用资生堂CAPCELL PAK C_(18)柱(SIZE:4.6 mmI.D.×250 mm,TYPE:MG II 5μm);以甲醇-0.05%磷酸溶液为流动相,采用梯...目的:建立HPLC法同时测定不同产地小槐花茎与叶中牡荆素、斯皮诺素、当药黄素、山柰酚含量的分析方法。方法:分析采用资生堂CAPCELL PAK C_(18)柱(SIZE:4.6 mmI.D.×250 mm,TYPE:MG II 5μm);以甲醇-0.05%磷酸溶液为流动相,采用梯度洗脱;柱温30℃;体积流量1.0 mL/min;检测波长368 nm。结果:4种成分在各自相应线性范围内线性关系良好(r>0.9997),平均加样回收率为98.86%~100.2%(RSD<3.0%)。结论:建立HPLC法能够同时测定不同产地小槐花茎与叶中4种黄酮类化合物的含量。该方法准确、稳定,重复性好,可用于小槐花的质量控制研究。展开更多
目的从虎眼万年青中提取、分离水溶性多糖,初步研究其特征和抗肿瘤活性。方法采用热水提取,乙醇沉淀,Sevag法脱蛋白,DEAE-Sepharose Fast Flow离子交换柱色谱和Sephadex G-75凝胶过滤柱色谱分离纯化,得到虎眼万年青均一多糖OCAP-2-2。...目的从虎眼万年青中提取、分离水溶性多糖,初步研究其特征和抗肿瘤活性。方法采用热水提取,乙醇沉淀,Sevag法脱蛋白,DEAE-Sepharose Fast Flow离子交换柱色谱和Sephadex G-75凝胶过滤柱色谱分离纯化,得到虎眼万年青均一多糖OCAP-2-2。毛细管区带电泳法(CZE)分析单糖组成;采用高效凝胶渗透色谱法(HPGPC)测定多糖纯度和相对分子质量;动物移植性实体瘤的瘤重实验法研究对小鼠S180肉瘤的抑瘤作用,采用细胞体外培养技术,MTT法检测对人白血病细胞株K562细胞的增殖抑制作用。结果经过分离纯化得到的均一多糖组分OCAP-2-2主要由葡萄糖、木糖、甘露糖、半乳糖等4种单糖组成,其相对分子质量之比为2.16∶1.26:0.88∶1.00,平均相对分子质量9.84×104,总糖含量为92.3%,总糖醛酸含量为6.21%,蛋白质含量为3.68%;在0.1～100μg.mL-1内与荷瘤对照组相比,OCAP-2-2对小鼠S180肉瘤有显著的抑制活性,其中多糖浓度为100μg.mL-1时抑瘤率达(53.16±4.23)%(P<0.001);OCAP-2-2对K562细胞有明显的增殖抑制作用(P<0.01),在多糖浓度为0.10μg.mL-1时,增殖抑制率最高为(39.83±7.31)%(P<0.01)。结论 OCAP-2-2具有很高的抗肿瘤活性,可以探索作为一种潜在的天然抗肿瘤药物。展开更多
基金This work was supported by the Ministry of Science and Technology of China (96-901-05-266).
文摘A new natural product (1) together with 26 know compounds were isolated from the Bulbs of Ornithogalum caudatum. Their structures were established on the basis of spectral analyses as n-butyl pyroglutamate (1), nonadecyl alcohol(2), eicosanol(3), behenic acid(4), b-sitosterol(5), stigmasterol(6), glycerol 1-monocerotate(7), pyrocatechol(8), p-ethoxybenzoic acid(9), p-coumarinic acid(10), protocatechuric acid(11), ursolic acid(12), betulinic acid(13), fumaric acid(14), succinic acid(15), uracil(16), xanthine(17), quercetin(18), kaempferol (19), isorham-netin(20), adenosine(21), daucosterol(22), stigmasterol 3-O-b-D-glucopyranoside(23), quercetin 3-O-b-D-glucopyra-noside(24), kaempferol 3-O-b-D-glucopyranoside(25), rutin(26), and kaempferol 3-O-b-rutinoside(27). All of them, except compound 5, were isolated from this plant for the first time.
文摘A water soluble crude extract prepared from Ornithogalum caudatum Ait. (OCA) showing a high immunomodulating activitiy was isolated and characterized by virtue of gel filtration and column chromatography. The presence of the monosaccharides has been established by the chemical analysis. The quantitative analysis of the alditol acetate derivatives of them showed the ratios of the monosaccharides analyzed by means of GC respectively. The concentrations of protein(280 nm) and carbohydrate(496 nm) were detected respectively. The information of the molecular weight from the pure polysaccharide was obtained by several standard Dextrans from the Sephadex chromatography.
文摘<span style="font-family:Verdana;">A simple method for assessment of the toxicity and antidote effect of selenium nanoparticles with </span><i><i><span style="font-family:Verdana;">Paramecium</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i><span style="font-family:Verdana;"> is presented. Light microscopy in combination with computerized video tracking is employed for </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">determination of </span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">survival time of <i></i></span><i><i><span style="font-family:Verdana;">P.</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i></span><span style="font-family:Verdana;">. Up to 800 mg/L, selenium nanoparticles are not acutely toxic. </span><span style="font-family:Verdana;">With</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> respect to a potential antidote effect, the lethality of silver nanoparticles, silver nitrate, sodium hydrogen selenite, and sodium selenite to <i></i></span><i><i><span style="font-family:Verdana;">P.</span></i><span> <i><span style="font-family:Verdana;">caudatum</span></i><span style="font-family:Verdana;"></span></span></i></span><span style="font-family:Verdana;"> was decreased and survival time was extend</span><span style="font-family:Verdana;">ed upon pre-treatment with selenium nanoparticles. Taken together, these findings suggest that administration of selenium nanoparticles attenuates</span><span style="font-family:Verdana;"> exposure </span><span style="font-family:Verdana;">to</span><span style="font-family:Verdana;"> toxicants. Selenium nanoparticles could be a good functional additive for food management in animals.</span>
基金supported by National Natural Science Foundation of China(8146056481760668+3 种基金81560597812606648136065881660689)
文摘OBJECTIVE To investigate toll-like receptor 4(TLR4)-related the regulation of Ornithogalum caudatum extract(OCE) on inflammatory responses in lipopolysaccharide(LPS) activated macro.phages.METHODS Primary peritoneal macrophage,Raw 264.7,and THP-1 were incubated in 96-well plate for 24 h and treated with OCE of the concentration of 0-400 μg/ml for 4 h.The viability of cells was measured by MTT assay.Specific concentrations of OCE were added into the medium of primary peri.toneal macrophage,Raw 264.7,and THP-1,respectively,then following with lipopolysaccharides(LPS).Cells were harvested and the total cellular protein and nuclear protein were extracted,and the protein content was determined using BCA protein assay Kit.The expressions of TLR4,inducible nitric oxide synthase(iNOS),cyclooxygenase 2(COX-2),α-inhibitor of NF-κB(IκB-α) and nuclear factor-κB(NF-κB) were assayed by Western blot.The expressions of interleukin-1α(IL-1α),interleukin-1β(IL-1β),interleukin-18(IL-18),and tumor necrosis factor-α(TNF-α) were measured by RT-PCR.RESULTS The results of MTT showed that OCE has no cytotoxicity in Raw 264.7 cells between 1.56 μg/ml and 400 μg/ml.Compared with normal group,the expressions of TLR4,iNOS,COX-2,NF-κB and IL-1α,IL-1β,IL-18,TNF-α,the level of nitric oxide(NO) were significantly increased by LPS stimulation,while OCE pretreat.ment reduced these increase induced by LPS.However,OCE pretreatment reversed the reduction of IκB-α after LPS stimulation.CONCLUSION OCE might suppress TLR4 expression and block the inflamma.tion process of NF-κB and iNOS,further decrease the expression of COX-2 and inhibit the release of inflammatory factors.
文摘目的:建立HPLC法同时测定不同产地小槐花茎与叶中牡荆素、斯皮诺素、当药黄素、山柰酚含量的分析方法。方法:分析采用资生堂CAPCELL PAK C_(18)柱(SIZE:4.6 mmI.D.×250 mm,TYPE:MG II 5μm);以甲醇-0.05%磷酸溶液为流动相,采用梯度洗脱;柱温30℃;体积流量1.0 mL/min;检测波长368 nm。结果:4种成分在各自相应线性范围内线性关系良好(r>0.9997),平均加样回收率为98.86%~100.2%(RSD<3.0%)。结论:建立HPLC法能够同时测定不同产地小槐花茎与叶中4种黄酮类化合物的含量。该方法准确、稳定,重复性好,可用于小槐花的质量控制研究。
文摘目的从虎眼万年青中提取、分离水溶性多糖,初步研究其特征和抗肿瘤活性。方法采用热水提取,乙醇沉淀,Sevag法脱蛋白,DEAE-Sepharose Fast Flow离子交换柱色谱和Sephadex G-75凝胶过滤柱色谱分离纯化,得到虎眼万年青均一多糖OCAP-2-2。毛细管区带电泳法(CZE)分析单糖组成;采用高效凝胶渗透色谱法(HPGPC)测定多糖纯度和相对分子质量;动物移植性实体瘤的瘤重实验法研究对小鼠S180肉瘤的抑瘤作用,采用细胞体外培养技术,MTT法检测对人白血病细胞株K562细胞的增殖抑制作用。结果经过分离纯化得到的均一多糖组分OCAP-2-2主要由葡萄糖、木糖、甘露糖、半乳糖等4种单糖组成,其相对分子质量之比为2.16∶1.26:0.88∶1.00,平均相对分子质量9.84×104,总糖含量为92.3%,总糖醛酸含量为6.21%,蛋白质含量为3.68%;在0.1～100μg.mL-1内与荷瘤对照组相比,OCAP-2-2对小鼠S180肉瘤有显著的抑制活性,其中多糖浓度为100μg.mL-1时抑瘤率达(53.16±4.23)%(P<0.001);OCAP-2-2对K562细胞有明显的增殖抑制作用(P<0.01),在多糖浓度为0.10μg.mL-1时,增殖抑制率最高为(39.83±7.31)%(P<0.01)。结论 OCAP-2-2具有很高的抗肿瘤活性,可以探索作为一种潜在的天然抗肿瘤药物。
