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排序方式: 共有125条查询结果,搜索用时 15 毫秒
1.
Two new homoisoflavans, 4′-hydroxy-7-methoxy-3-benzyl-2H-chromene (1) and 3,4-cis-di-O-3-hydroxy-7-methoxy-3-(4-hydroxybenzyl)-4-ethoxychroman (2), one new coumarin, 7-methoxy-3-(4-hydroxybenzyl)coumarin (4), together with seven known phenolic compounds, bonducellin (3), anemarcoumarin A (5), (+)-syringaresinol (6), curuilignan D (7), scopoletin (8), and p-hydroxybenzaldehyde (9), were isolated from Tara (Caesalpinia spinosa Kuntze). The structures of the new compounds were characterized from their 1D and 2D NMR spectral data. All the compounds were isolated from this plant for the first time.  相似文献   
2.
目的探究苏木Caesalpinia sappan的活性成分苏木酮A对大鼠类风湿性关节炎(rheumatoid arthritis,RA)的治疗作用。方法以牛Ⅱ型胶原蛋白诱导建立RA大鼠模型,以苏木酮A(50mg/kg)进行干预,考察大鼠足容积变化,对大鼠踝关节组织进行病理分析,采用免疫组化考察大鼠踝关节组织中白细胞介素-6(interleukin-6,IL-6)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)和基质金属蛋白酶-9(matrix metalloproteinase-9,MMP-9)表达。以脂多糖诱导Raw264.7细胞建立炎症细胞模型,考察苏木酮A对Raw264.7细胞上清液中一氧化氮和IL-6水平的影响。结果苏木酮A显著降低RA大鼠足容积(P<0.05),改善RA大鼠踝关节滑膜组织损伤,抑制RA大鼠踝关节滑膜组织中IL-6、TNF-α和MMP-9的表达。苏木酮A显著抑制脂多糖诱导的Raw264.7细胞上清液中一氧化氮和IL-6水平(P<0.01)。结论苏木酮A可有效缓解大鼠RA。  相似文献   
3.
Objective:To clarify the active constituents of the heartwoods of Caesalpinia sappan,a traditional Chinese medicine with the functions of promoting blood circulation(Huoxue in Chinese) and removing blood stasis(Quyu in Chinese).Methods:The chemical constituents were isolated and purified by combination of silica gel and Sephadex LH-20 column chromatography,along with semipreparative HPLC.Their chemical structures were established by multiple spectroscopic methods and comparison with literature data.The in vitro antiplatelet aggregation activities were evaluated using mouse platelet induced by AYPGKF-NH2,a gold agonist of protease-activated receptor 4(PAR4).Results:Two new phenols,methyl 2-(4,4',5'-trihydroxy-2'-(methoxymethyl) biphenyl-2-yloxy) acetate(1)and 1'-methylcaesalpin J(2),together with 24 known compounds(3-26),were isolated from the heartwoods of C.sappan.Among them,sappanchalcone(16) and brazilin(20) showed inhibitory activities against mouse platelet aggregation with IC50 values of 114.8 μmol/L and 100.8 μmol/L,respectively.Conclusion:Antiplatelet compounds from C.sappan targeting at PAR4 are reported for the first time.  相似文献   
4.
苏木的化学成分研究   总被引:1,自引:1,他引:0  
蔡晨秋  赵明波  唐丽  屠鹏飞 《中草药》2012,43(2):230-233
目的研究苏木Caesalpinia sappan的化学成分。方法采用硅胶、葡聚糖凝胶Sephadex LH-20柱色谱、半制备液相色谱等方法分离纯化,通过理化性质、波谱数据及与对照品共薄层色谱鉴定化合物结构。结果从苏木心材95%乙醇提取物的石油醚萃取部位分离并鉴定了11个化合物,分别为1-羟基-7-甲氧基呫吨酮(1)、2-羟基呫吨酮(2)、1,5-二羟基呫吨酮(3)、1,7-二羟基呫吨酮(4)、大黄酚(5)、木栓酮(6)、熊果酸(7)、β-谷甾醇棕榈酸酯(8)、麦角甾烷-4,6,8(14),22(23)-四烯-3-酮(9)、豆甾醇(10)、β-谷甾醇(11)。结论除化合物10、11外,其余均为首次从该植物中分离得到,其中化合物1~5为首次从云实属植物中分离得到,同时也是该属植物中首次分得的呫吨酮和蒽醌类化合物。  相似文献   
5.

Ethnopharmacological relevance

Caesalpinia sappan is a medicinal plant native to China popularly used to treat chronic pelvic inflammation, dysmenorrhea and hysteromyoma. Its main bioactive component is brazilin which had presented antibacterial, anti-inflammatory and anti-platelet aggregation activities. To establish a sensitive, selective, reproducible, and accurate high performance liquid chromatographic (HPLC) method for the quantitative determination of brazilin in plasma, and study the pharmacokinetics of brazilin in rats after intravenous administration of brazilin.

Materials and methods

Rats received intravenous injection of 25, 50 and 100 mg/kg of brazilin. Concentrations of brazilin in plasma were determined by HPLC method at different time points and all pharmacokinetic parameters were estimated by non-compartmental analysis with WinNonLin 6.2 software.

Results

After single intravenous doses of 25, 50 and 100 mg/kg brazilin in rats, the main PK parameters were as follows: Cmax were 18.1±4.1, 46.7±8.7 and 82.2±9.6 µg/mL; AUC0–24 were 20.4±4.3, 48.7±6.8 and 90.4±10.3 µg h/mL; and t1/2 were 5.4±1.5, 5.8±0.9 and 6.2±1.2 h, respectively.

Conclusion

It showed that the brazilin was eliminated moderately in rat by intravenous injection route with t1/2 of 6 h and showed a dose-dependence profile of Cmax and AUC0–24 at the doses of 25~100 mg/kg of brazilin for injection in rats.  相似文献   
6.
目的:建立苦石莲中总二萜的含量测定方法,优化总二萜的提取工艺,并进行含量测定。方法:采用可见分光光度法,以5%香草醛/冰乙酸-高氯酸为显色剂,化合物caesalpinins K为对照品,在530 nm处测定其吸光度值,利用回归方程计算苦石莲中总二萜含量。结果:Caesalpinins K对照品溶液质量浓度在2.0~6.1 mg.L-1,线性关系良好,r=0.999 5(n=5),平均回收率为101.8%(RSD 2.3%)。结论:该方法简便、准确、重复性好,可以为苦石莲的质量控制提供依据。  相似文献   
7.
Caesalpinia sappan (C. sappan) is a medicinal plant used for promoting blood circulation and removing stasis. During a screening procedure on medicinal plants, the ethylacetate extract of the lignum of C. sappan (CLE) showed inhibitory activity on arginase which has recently been reported as a novel therapeutic target for the treatment of cardiovascular diseases such as atherosclerosis. CLE inhibited arginase II activity prepared from kidney lysate in a dose-dependent manner. In HUVECs, inhibition of arginase activity by CLE reciprocally increased NOx production through enhancement of eNOS dimer stability without any significant changes in the protein levels of eNOS and arginase II expression. Furthermore, CLE-dependent arginase inhibition resulted in increase of NO generation and decrease of superoxide production on endothelium of isolated mice aorta. These results indicate that CLE augments NO production on endothelium through inhibition of arginase activity, and may imply their usefulness for the treatment of cardiovascular diseases associated with endothelial dysfunction.  相似文献   
8.
Three new cassane-diterpene-lactones, methyl 1α,7β-diacetoxy-5α,12α-dihydroxy-cass-13(15)-en-16,12-olide-17β-carboxylate (1), methyl 7β-acetoxy-1α,5α,12α-trihydroxy-cass-13(15)-en-16,12-olide-17β-carboxylate (2), and 12α-ethoxyl-1α,6α,7β-triacetoxy-5α,14β-dihydroxy-cass-13(15)-en-16,12-olide (3), were isolated from the seeds of Caesalpinia minax Hance. Their structures were established on the basis of HR-ESI-MS, 1D and 2D NMR spectral analysis.  相似文献   
9.
《Pharmaceutical biology》2013,51(2):227-230
This study evaluated the in vivo immunomodulatory activities of the aqueous extract of Caesalpinia bonducella Fleming (Caesalpiniaceae) seeds. C. bonducella is a plant widely used in the traditional medicinal systems of India. In the present investigation, the aqueous extract of C. bonducella seeds was tested for its effect on cell mediated and humoral components of the immune system in rats. Administration of C. bonducella seed extract produced an increase of 93.03?±?4 mean hemagglutinating antibody (HA) titer and a change of 0.56?±?0.058?mm in delayed type hypersensitivity (DTH) as compared to control at a dose of 400?mg/kg body weight. Thus, the results of this study indicate that C. bonducella extract could be a promising immunostimulatory agent.  相似文献   
10.
南蛇簕的研究进展   总被引:1,自引:1,他引:0  
南蛇簕为广西常见的药用植物之一,民间用于治疗流感与带状疱疹,作者对南蛇簕的本草考证以及化学成分、药理作用等方面的文献进行系统整理,对记载南蛇簕的相关书籍,以及国内外的文献报道进行归纳、分析与总结.南蛇簕的种子、茎、根、嫩苗的功效相似,种子具有显著抗流感的活性成分主要为呋喃型二萜类成分,且多数为自然界首次发现的新化合物.目前对于南蛇簕种子的研究已经取得较大成果,但其药源有限,建议研究该植物其他药用部位,扩大药源,为今后合理开发该植物的药用价值提供进一步的参考.  相似文献   
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