Objective:To investigate the anti-anaphylactic,anti-inflammatory and membrane stabilizing properties of plumerianine(compound 1)isolated from the root bark of Plumeria acuifolia Poir.Methods:The anti-anaphylactic acti...Objective:To investigate the anti-anaphylactic,anti-inflammatory and membrane stabilizing properties of plumerianine(compound 1)isolated from the root bark of Plumeria acuifolia Poir.Methods:The anti-anaphylactic activity of compound 1(10,25 and 50 mg/kg)was studied by using models such as passive cutaneous anaphylaxis,passive paw anaphylaxis and its antiinflammatory activity against carrageenin induced paw edema and cotton pellet granuloma in albino rats was also investigated using ketotifen and indomethacin as reference drugs.Results:A dose-dependent beneficial effect was observed on leakage of evans blue dye in skin challenged with antigen and on paw anaphylaxis induced by antiserum.The compound 1 also exhibited significant(P<0.01)inhibition of rat paw edema and granuloma tissue formation,including significant protection of RBC against the haemolytic effect of hypotonic solution,an indication of membrane-stabilizing activity.Conclusions:Anti-anaphylactic activity of compound 1 may be possibly due to inhibition of the release of various inflammatory mediators.Anti-inflammatory activity of compound may be related to the inhibition of the early phase and late phase of inflammatory events.展开更多
DNA barcoding and HPLC specific chromatogram were used to identify three kinds of Plumeria flowers respectively. DNAs extracted from the three Plumeria species were amplified by PCR with universal primers, and the psb...DNA barcoding and HPLC specific chromatogram were used to identify three kinds of Plumeria flowers respectively. DNAs extracted from the three Plumeria species were amplified by PCR with universal primers, and the psbA-trnH region was selected. All the amplified products were sequenced and the results were analyzed by MEGA 5.0. Chemometric methods including principal components analysis and hierarchical clustering analysis were conducted on the SAS 9.0 software to demonstrate the variability among samples. In conclusion, the psbA-trnH of all samples were successfully amplified from total DNA and sequenced. These three varieties of Plumeria can be differentiated by the psbA-trnH region and clustered into three groups respectively through building neighbor joining tree, which conformed to their germplasm origins. However, it was hard to distinguish them by HPLC specific chromatograms combined with chemometrics analysis. These indicated that DNA barcoding was a promising and reliable tool for the identification of three kinds of Plumeria flowers compared to HPLC specific chromatogram generally used. It could be treated as a powerful complementary method for traditional authentication, especially for those varieties which are difficult to be identified by conventional chromatography.展开更多
A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological ch...A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological characters and a phylogenetic analysis by using ITS sequence data.This is the first record of R.coleosporii on C.plumeriae in Thailand.Ramularia coleosporii has the potential for biocontrol management strategies of the rust.展开更多
Bio-inspired eco-friendly gold nanoparticles were synthesized by a green method using aqueous Plume- ria alba flower extract （PAFE）. The use of 1% and 5% concentrations of PAFE resulted in two different sizes of P. ...Bio-inspired eco-friendly gold nanoparticles were synthesized by a green method using aqueous Plume- ria alba flower extract （PAFE）. The use of 1% and 5% concentrations of PAFE resulted in two different sizes of P. alba gold nanoparticles, PAGNPsl and PAGNPs2, with surface plasmon resonance （SPR） peaks at 552 and 536 nm, respectively. Size-controlled formation of gold nanoparticles was indicated by the SPR shift observed with increasing concentration of PAFE. The accurate size and morphology of PAGNPs I and PAGNPs2 were determined by transmission electron microscope （TEM） analysis is found to be 28 ＋ 5.6 and 15.6 4-3.4 nm, respectively, and those are spherical in shape. The antibacterial activity of PAGNPsl and PAGNPs2 was tested against Escherichia coil; the small-sized PAGNPs2 exhibited better antibacterial activity with a 16-mm zone of inhibition at a concentration of 400 txg/mL. Furthermore, the catalytic activity of PAGNPsl and PAGNPs2 was analyzed on six hazardous dyes; PAGNPs2 exhibited more pro- nounced catalytic activity than PAGNPsl. Among all of the dyes, 4-nitrophenol was most rapidly degraded to 4-aminophenol by PAGNPs2 within 5 min. The mechanism of catalysis in the presence of PAGNPsl and PAGNPs2 can be described as an electron transfer process from donor NaBH4 to an acceptor. The facile green synthesis of such eco-friendly nanoparticles in bulk suggests this method has potential industrial applications.展开更多
OBJECTIVE： This study was conducted to evaluate the antiulcerogenic property of hydroalcoholic extract obtained from the leaves of Plumeria alba Linn. METHODS： Antiulcer assays were performed using the protocols of ...OBJECTIVE： This study was conducted to evaluate the antiulcerogenic property of hydroalcoholic extract obtained from the leaves of Plumeria alba Linn. METHODS： Antiulcer assays were performed using the protocols of ulcer induced by non- steroidal anti-inflammatory drugs, ethanol and pylorus ligation. The hydroalcoholic extract （HAPA）, and various fractions of HAPA like, n-hexane extract （HPA）, ethyl acetate extract （EAPA） and n-butanol extract （BPA） were administered at doses of 200 and 400 mg/kg for HAPA and 100 and 200 mg/kg for fractions of extracts. Parameters of gastric secretion （volume, pH, total protein, and free and total acidity） were determined by the pylorus ligation model. Parameters like aspartate aminotransferase and alanine aminotransferase were also determined in ethanol- induced ulcer model. To determine the mechanism of action, role of nitric oxide was also evaluated. RESULTS： EAPA and BPA （100 and 200 mg/kg, p.o.） showed gastric ulcer-healing effect in indomethacin-induced ulcer model, while HAPA （200 mg/kg） and HPA showed no significant antiulcer effect. Both EAPA and BPA showed gastric cytoprotective effect in ethanol-induced gastric ulcer and inhibited gastric secretion in pylorus-ligated rats. CONCLUSION： The results of the present study show that some hydroalcoholic extract of Plumeria alba L. displays antiulcer activity, as demonstrated by the significant inhibition of ulcer formation induced by different models, which is consistent with the literature report in folk medicine.展开更多
目的探讨鸡蛋花提取物是否具有抗突变活性,为其开发应用提供实验依据。方法采用高内涵体外微核实验和Ames实验,计数微核细胞数、回复突变菌落数,计算微核细胞率、相对菌落数及其抑制率;评价不同浓度的鸡蛋花提取物的抗突变效应。结果高...目的探讨鸡蛋花提取物是否具有抗突变活性,为其开发应用提供实验依据。方法采用高内涵体外微核实验和Ames实验,计数微核细胞数、回复突变菌落数,计算微核细胞率、相对菌落数及其抑制率;评价不同浓度的鸡蛋花提取物的抗突变效应。结果高内涵体外微核实验中鸡蛋花提取物20、10mg/m L 2个剂量预处理致突变剂条件下的微核细胞率与致突变剂对照组比较差异有统计学意义(P<0.01);鸡蛋花提取物与致突变剂同时加入条件下未观察到抗突变效应。Ames实验中鸡蛋花提取物预处理致突变剂条件下对TA98、TA100的相对回变菌落数与致突变剂对照组比较差异有统计学意义(P<0.01或P<0.05),且呈一定的剂量-反应关系;同时加入条件下只在25 mg/皿剂量组呈现出对致突变剂的抑制作用。结论本实验条件下,鸡蛋花提取物能够直接灭活致突变剂,具有一定的拮抗突变的作用。展开更多
目的:比较不同来源鸡蛋花中挥发性成分的异同。方法:参照2010年版中国药典,采用水蒸气蒸馏法提取鸡蛋花鲜品(红色与白色)及不同产地干品中挥发性成分,以GC-MS法结合NIST MS Search 2.0质谱库检索,确定成分名称及其相对百分含量。结果:...目的:比较不同来源鸡蛋花中挥发性成分的异同。方法:参照2010年版中国药典,采用水蒸气蒸馏法提取鸡蛋花鲜品(红色与白色)及不同产地干品中挥发性成分,以GC-MS法结合NIST MS Search 2.0质谱库检索,确定成分名称及其相对百分含量。结果:从鸡蛋花药材中检测到55个色谱峰,并确认其中26个挥发性成分及其相对百分含量,主要为脂肪醇及酯类成分。鸡蛋花鲜品中含量最高的为苯甲酸香叶酯,干品中该成分含量相对较低。结论:不同来源鸡蛋花的挥发性成分组成与花的颜色相关性不大,与新鲜或干燥有较大关系。展开更多
文摘Objective:To investigate the anti-anaphylactic,anti-inflammatory and membrane stabilizing properties of plumerianine(compound 1)isolated from the root bark of Plumeria acuifolia Poir.Methods:The anti-anaphylactic activity of compound 1(10,25 and 50 mg/kg)was studied by using models such as passive cutaneous anaphylaxis,passive paw anaphylaxis and its antiinflammatory activity against carrageenin induced paw edema and cotton pellet granuloma in albino rats was also investigated using ketotifen and indomethacin as reference drugs.Results:A dose-dependent beneficial effect was observed on leakage of evans blue dye in skin challenged with antigen and on paw anaphylaxis induced by antiserum.The compound 1 also exhibited significant(P<0.01)inhibition of rat paw edema and granuloma tissue formation,including significant protection of RBC against the haemolytic effect of hypotonic solution,an indication of membrane-stabilizing activity.Conclusions:Anti-anaphylactic activity of compound 1 may be possibly due to inhibition of the release of various inflammatory mediators.Anti-inflammatory activity of compound may be related to the inhibition of the early phase and late phase of inflammatory events.
基金supported by the Industry-University-Research Cooperation Program from Science and Technology Department of Guangdong Province (No.: 2013B090600058)the National Key Research and Development Program of China (2017YFC170116)
文摘DNA barcoding and HPLC specific chromatogram were used to identify three kinds of Plumeria flowers respectively. DNAs extracted from the three Plumeria species were amplified by PCR with universal primers, and the psbA-trnH region was selected. All the amplified products were sequenced and the results were analyzed by MEGA 5.0. Chemometric methods including principal components analysis and hierarchical clustering analysis were conducted on the SAS 9.0 software to demonstrate the variability among samples. In conclusion, the psbA-trnH of all samples were successfully amplified from total DNA and sequenced. These three varieties of Plumeria can be differentiated by the psbA-trnH region and clustered into three groups respectively through building neighbor joining tree, which conformed to their germplasm origins. However, it was hard to distinguish them by HPLC specific chromatograms combined with chemometrics analysis. These indicated that DNA barcoding was a promising and reliable tool for the identification of three kinds of Plumeria flowers compared to HPLC specific chromatogram generally used. It could be treated as a powerful complementary method for traditional authentication, especially for those varieties which are difficult to be identified by conventional chromatography.
基金supported by the Natural Science Foundation of China(No.31600024)。
文摘A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological characters and a phylogenetic analysis by using ITS sequence data.This is the first record of R.coleosporii on C.plumeriae in Thailand.Ramularia coleosporii has the potential for biocontrol management strategies of the rust.
文摘Bio-inspired eco-friendly gold nanoparticles were synthesized by a green method using aqueous Plume- ria alba flower extract （PAFE）. The use of 1% and 5% concentrations of PAFE resulted in two different sizes of P. alba gold nanoparticles, PAGNPsl and PAGNPs2, with surface plasmon resonance （SPR） peaks at 552 and 536 nm, respectively. Size-controlled formation of gold nanoparticles was indicated by the SPR shift observed with increasing concentration of PAFE. The accurate size and morphology of PAGNPs I and PAGNPs2 were determined by transmission electron microscope （TEM） analysis is found to be 28 ＋ 5.6 and 15.6 4-3.4 nm, respectively, and those are spherical in shape. The antibacterial activity of PAGNPsl and PAGNPs2 was tested against Escherichia coil; the small-sized PAGNPs2 exhibited better antibacterial activity with a 16-mm zone of inhibition at a concentration of 400 txg/mL. Furthermore, the catalytic activity of PAGNPsl and PAGNPs2 was analyzed on six hazardous dyes; PAGNPs2 exhibited more pro- nounced catalytic activity than PAGNPsl. Among all of the dyes, 4-nitrophenol was most rapidly degraded to 4-aminophenol by PAGNPs2 within 5 min. The mechanism of catalysis in the presence of PAGNPsl and PAGNPs2 can be described as an electron transfer process from donor NaBH4 to an acceptor. The facile green synthesis of such eco-friendly nanoparticles in bulk suggests this method has potential industrial applications.
文摘OBJECTIVE： This study was conducted to evaluate the antiulcerogenic property of hydroalcoholic extract obtained from the leaves of Plumeria alba Linn. METHODS： Antiulcer assays were performed using the protocols of ulcer induced by non- steroidal anti-inflammatory drugs, ethanol and pylorus ligation. The hydroalcoholic extract （HAPA）, and various fractions of HAPA like, n-hexane extract （HPA）, ethyl acetate extract （EAPA） and n-butanol extract （BPA） were administered at doses of 200 and 400 mg/kg for HAPA and 100 and 200 mg/kg for fractions of extracts. Parameters of gastric secretion （volume, pH, total protein, and free and total acidity） were determined by the pylorus ligation model. Parameters like aspartate aminotransferase and alanine aminotransferase were also determined in ethanol- induced ulcer model. To determine the mechanism of action, role of nitric oxide was also evaluated. RESULTS： EAPA and BPA （100 and 200 mg/kg, p.o.） showed gastric ulcer-healing effect in indomethacin-induced ulcer model, while HAPA （200 mg/kg） and HPA showed no significant antiulcer effect. Both EAPA and BPA showed gastric cytoprotective effect in ethanol-induced gastric ulcer and inhibited gastric secretion in pylorus-ligated rats. CONCLUSION： The results of the present study show that some hydroalcoholic extract of Plumeria alba L. displays antiulcer activity, as demonstrated by the significant inhibition of ulcer formation induced by different models, which is consistent with the literature report in folk medicine.
文摘目的探讨鸡蛋花提取物是否具有抗突变活性,为其开发应用提供实验依据。方法采用高内涵体外微核实验和Ames实验,计数微核细胞数、回复突变菌落数,计算微核细胞率、相对菌落数及其抑制率;评价不同浓度的鸡蛋花提取物的抗突变效应。结果高内涵体外微核实验中鸡蛋花提取物20、10mg/m L 2个剂量预处理致突变剂条件下的微核细胞率与致突变剂对照组比较差异有统计学意义(P<0.01);鸡蛋花提取物与致突变剂同时加入条件下未观察到抗突变效应。Ames实验中鸡蛋花提取物预处理致突变剂条件下对TA98、TA100的相对回变菌落数与致突变剂对照组比较差异有统计学意义(P<0.01或P<0.05),且呈一定的剂量-反应关系;同时加入条件下只在25 mg/皿剂量组呈现出对致突变剂的抑制作用。结论本实验条件下,鸡蛋花提取物能够直接灭活致突变剂,具有一定的拮抗突变的作用。
文摘目的:比较不同来源鸡蛋花中挥发性成分的异同。方法:参照2010年版中国药典,采用水蒸气蒸馏法提取鸡蛋花鲜品(红色与白色)及不同产地干品中挥发性成分,以GC-MS法结合NIST MS Search 2.0质谱库检索,确定成分名称及其相对百分含量。结果:从鸡蛋花药材中检测到55个色谱峰,并确认其中26个挥发性成分及其相对百分含量,主要为脂肪醇及酯类成分。鸡蛋花鲜品中含量最高的为苯甲酸香叶酯,干品中该成分含量相对较低。结论:不同来源鸡蛋花的挥发性成分组成与花的颜色相关性不大,与新鲜或干燥有较大关系。
