目的研究溪黄草的化学成分及二萜成分的细胞毒活性。方法采用柱层析对溪黄草植物中的提取物进行分离提纯,并利用现代波谱方法分析鉴定,确定化合物的结构,采用磺酰罗丹明B染色法对提取的单体化合物进行体外细胞毒试验。结果从该植物中分...目的研究溪黄草的化学成分及二萜成分的细胞毒活性。方法采用柱层析对溪黄草植物中的提取物进行分离提纯,并利用现代波谱方法分析鉴定,确定化合物的结构,采用磺酰罗丹明B染色法对提取的单体化合物进行体外细胞毒试验。结果从该植物中分离出8个二萜化合物,其中4个化合物有较好的细胞毒活性。结论 Enmein、Nodosin、Isodocarpin和Efusanin A 4种化合物具有较好的细胞毒活性。展开更多
目的观察狭基线纹香茶菜提取物对免疫性肝损伤小鼠TNF-α释放及肝组织超微结构的影响。方法 50只雄性NIH小鼠,随机分为5组,分别为正常对照组,模型组,狭基线纹香茶菜提取物高、低剂量组(剂量分别为18.2g/kg、4.55g/kg),与环磷酰胺(43mg/...目的观察狭基线纹香茶菜提取物对免疫性肝损伤小鼠TNF-α释放及肝组织超微结构的影响。方法 50只雄性NIH小鼠,随机分为5组,分别为正常对照组,模型组,狭基线纹香茶菜提取物高、低剂量组(剂量分别为18.2g/kg、4.55g/kg),与环磷酰胺(43mg/kg)对照组。除正常对照组外,其余小鼠于实验首日上午尾静脉注射刀豆蛋白A(ConA)20mg/Kg,并于首日、次日和第3d、第4d下午各给药1次,第5d给药后2h,模型组和各给药组小鼠再次尾静脉注射Con A 20mg/kg,4h后,每组取相同序号小鼠8只,取血检测血清TNF-α活性,每组所剩2只小鼠,8h后处死取肝组织,3%戊二醛固定,切片,染色后,透射电镜观察肝组织超微结构。结果显示模型组TNF-α活性较正常组明显升高,肝组织超微结构发生了显著改变,肝细胞严重肿胀、线粒体破坏、毛细胆管和肝窦腔结构明显变形、中性粒细胞滞留,细胞及细胞器的完整性遭到破坏。狭基线纹香茶菜提取物高、低剂量组TNF-α活性较模型组明显降低(P<0.01、0.05)、肝组织超微结构虽有一定程度改变,但细胞及细胞器的形态及完整性得到保护。结论狭基线纹香茶菜具有较好的保肝作用,其作用机理与抑制TNF-α的产生密切相关。展开更多
Two new ent-kaurane diterpenoids, ent-7α,14β-dihydroxykaur-16-en-15-one-20-oic acid （1） and 1,7α,12β,14β-tetrahydroxy-1,10-seco-ent-kaur-10,16-dien-15-one （2）, together with six known ones （3-8）, were isola...Two new ent-kaurane diterpenoids, ent-7α,14β-dihydroxykaur-16-en-15-one-20-oic acid （1） and 1,7α,12β,14β-tetrahydroxy-1,10-seco-ent-kaur-10,16-dien-15-one （2）, together with six known ones （3-8）, were isolated from the EtOAc extract of the aerial parts of lsodon excisoides. Their structures were elucidated on the basis of 1D NMR and 2D NMR analyses as well as HR-ESI-MS experiments.展开更多
One new 6,7-seco-ent-kaurane diterpenoid, sculponin T （1）, was isolated from the aerial parts of lsodon sculponeatus, along with four known analogs, sculponeatin J （2）, sculponeatin K （3）, sculponeatin C （4）, ...One new 6,7-seco-ent-kaurane diterpenoid, sculponin T （1）, was isolated from the aerial parts of lsodon sculponeatus, along with four known analogs, sculponeatin J （2）, sculponeatin K （3）, sculponeatin C （4）, and sculponeatin Q （5）. Their structures were elucidated by extensive spectroscopic analysis and by comparison with data reported in the literature. Significant cytotoxic activity was observed for compound 2 against five human tumor cell lines with IC50 values ranging from 1.8 μmol/L to 3.3 μmol/L, and it also inhibited NO production in LPS-stimulated RAW264.7 cells, with IC50 value of 3.3 μmol/L.展开更多
An attempt had been made to isolate and identify the low polar volatile constituents from Isodon excisa. The dried plants were heat extracted with ethanol and then extracted with petroleum ether. The constituents were...An attempt had been made to isolate and identify the low polar volatile constituents from Isodon excisa. The dried plants were heat extracted with ethanol and then extracted with petroleum ether. The constituents were isolated and analyzed by GC-MS and then we retrieved them on NIST08 mass spectrometry database to determine their structures. Finally, successful results were achieved, 111 compounds were obtained and identified. 105 of them were reported for the first time in lsodon excisa and 22 of them were first found in natural products. Thus, the main constituents of it were found to be Sitosterol （33.28%）, 3-Amino-4-pyrazolecarbonitrile （9.55%）展开更多
Two new ent-kaurane diterpenoids, minheryins H （1） and I （2）, were isolated from the leaves of Isodon henryi. Their structures were elucidated by means of spectroscopic analysis, including 2D NMR spectra.
文摘目的研究溪黄草的化学成分及二萜成分的细胞毒活性。方法采用柱层析对溪黄草植物中的提取物进行分离提纯,并利用现代波谱方法分析鉴定,确定化合物的结构,采用磺酰罗丹明B染色法对提取的单体化合物进行体外细胞毒试验。结果从该植物中分离出8个二萜化合物,其中4个化合物有较好的细胞毒活性。结论 Enmein、Nodosin、Isodocarpin和Efusanin A 4种化合物具有较好的细胞毒活性。
文摘目的观察狭基线纹香茶菜提取物对免疫性肝损伤小鼠TNF-α释放及肝组织超微结构的影响。方法 50只雄性NIH小鼠,随机分为5组,分别为正常对照组,模型组,狭基线纹香茶菜提取物高、低剂量组(剂量分别为18.2g/kg、4.55g/kg),与环磷酰胺(43mg/kg)对照组。除正常对照组外,其余小鼠于实验首日上午尾静脉注射刀豆蛋白A(ConA)20mg/Kg,并于首日、次日和第3d、第4d下午各给药1次,第5d给药后2h,模型组和各给药组小鼠再次尾静脉注射Con A 20mg/kg,4h后,每组取相同序号小鼠8只,取血检测血清TNF-α活性,每组所剩2只小鼠,8h后处死取肝组织,3%戊二醛固定,切片,染色后,透射电镜观察肝组织超微结构。结果显示模型组TNF-α活性较正常组明显升高,肝组织超微结构发生了显著改变,肝细胞严重肿胀、线粒体破坏、毛细胆管和肝窦腔结构明显变形、中性粒细胞滞留,细胞及细胞器的完整性遭到破坏。狭基线纹香茶菜提取物高、低剂量组TNF-α活性较模型组明显降低(P<0.01、0.05)、肝组织超微结构虽有一定程度改变,但细胞及细胞器的形态及完整性得到保护。结论狭基线纹香茶菜具有较好的保肝作用,其作用机理与抑制TNF-α的产生密切相关。
基金supported by the opening fund of Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,Huazhong University of Science and Technology
文摘Two new ent-kaurane diterpenoids, ent-7α,14β-dihydroxykaur-16-en-15-one-20-oic acid （1） and 1,7α,12β,14β-tetrahydroxy-1,10-seco-ent-kaur-10,16-dien-15-one （2）, together with six known ones （3-8）, were isolated from the EtOAc extract of the aerial parts of lsodon excisoides. Their structures were elucidated on the basis of 1D NMR and 2D NMR analyses as well as HR-ESI-MS experiments.
基金supported financially by the National Natural Science Foundation of China(Nos.21322204 and 81172939)the NSFC-Joint Foundation of Yunnan Province(No.U1302223)+1 种基金the Reservation-talent Project of Yunnan Province(No.2011CI043)the West Light Foundation of the Chinese Academy of Sciences(Jian-Xin Pu)
文摘One new 6,7-seco-ent-kaurane diterpenoid, sculponin T （1）, was isolated from the aerial parts of lsodon sculponeatus, along with four known analogs, sculponeatin J （2）, sculponeatin K （3）, sculponeatin C （4）, and sculponeatin Q （5）. Their structures were elucidated by extensive spectroscopic analysis and by comparison with data reported in the literature. Significant cytotoxic activity was observed for compound 2 against five human tumor cell lines with IC50 values ranging from 1.8 μmol/L to 3.3 μmol/L, and it also inhibited NO production in LPS-stimulated RAW264.7 cells, with IC50 value of 3.3 μmol/L.
文摘An attempt had been made to isolate and identify the low polar volatile constituents from Isodon excisa. The dried plants were heat extracted with ethanol and then extracted with petroleum ether. The constituents were isolated and analyzed by GC-MS and then we retrieved them on NIST08 mass spectrometry database to determine their structures. Finally, successful results were achieved, 111 compounds were obtained and identified. 105 of them were reported for the first time in lsodon excisa and 22 of them were first found in natural products. Thus, the main constituents of it were found to be Sitosterol （33.28%）, 3-Amino-4-pyrazolecarbonitrile （9.55%）
基金the Natural Science Foundation of Yunnan Province (No. 2004C0008Z)the National Natural Science Foundation of China (No.20502026 to Q.B.H.and No.30772637 to H.D.Sun).
文摘Two new ent-kaurane diterpenoids, minheryins H （1） and I （2）, were isolated from the leaves of Isodon henryi. Their structures were elucidated by means of spectroscopic analysis, including 2D NMR spectra.
