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1.
黄芩活性成分提取分离研究进展   总被引:6,自引:0,他引:6  
黄芩由于具有广泛的生物活性备受国内外学者关注,其活性成分提取分离技术也得到了一定的发展。笔者查阅了国内外关于黄芩活性成分提取分离的大量资料,综述了黄芩苷、黄芩素及其他成分提取、分离纯化方法的研究,从而为开辟新的提取分离技术奠定了文献基础。  相似文献   

2.
目的 探讨一种黄芩药材中黄酮苷元类成分黄芩素和汉黄芩素定量测定方法.方法 通过黄芩自身所含的酶在适宜温度条件下将黄芩药材中的黄芩苷、汉黄芩苷等黄酮苷类成分酶解成黄芩素和汉黄芩素等黄酮苷元,再利用高效液相色谱法进行含量测定.结果 黄芩素酶解完全,色谱峰分离良好,且同一流动相下可同时测定黄芩素和汉黄芩素的含量.黄芩素的平均回收率为96.45%,RSD为1.34%(n=9);汉黄芩素的平均回收率为97.86%,RSD为1.89%(n=9).结论 所用测定方法简便、准确,为黄芩素和汉黄芩素的充分提取、分离提供了真实的基础含量数据.  相似文献   

3.
黄芩的化学成分及黄芩苷的提取方法   总被引:5,自引:0,他引:5  
目的介绍唇形科植物黄芩的主要化学成分和黄芩苷的提取方法。方法参阅近年来国内外文献,并进行整理综述。结果黄芩中主要的4种化学成分为黄芩苷、汉黄芩苷、黄芩素和汉黄芩素。以黄芩苷和黄芩素含量较高,黄芩苷的提取工艺多种多样,各有优劣。结论黄芩苷具有多种生理活性,已成为多种中成药的组方之一,其提取工艺有超滤、超声和微波等,近年来发展起来的先进方法值得关注。  相似文献   

4.
目的建立一测多评测定复方黄白胶囊中4种黄酮成分(黄芩苷、汉黄芩苷、黄芩素和汉黄芩素)的方法。方法采用斜率校正法,以黄芩苷作为内参物,计算汉黄芩苷、黄芩素和汉黄芩素与黄芩苷的相对校正因子;分别用一测多评法和外标法测定复方黄白胶囊中4种黄酮成分的含量。结果黄芩苷、汉黄芩苷、黄芩素及汉黄芩素的色谱保留时间分别为14.80、28.58、37.76及47.52。阴性对照在相应位置处未见色谱峰,样品色谱图中黄芩苷、汉黄芩苷、黄芩素及汉黄芩索色谱峰的纯度因子分别为998.8、995.2、989.6及988.5。汉黄芩苷、黄芩素及汉黄芩素与黄芩苷间的相对校正因子分别为1.396、1.808和2.010。复方黄白胶囊中4种黄酮成分采用校正因子计算的含量值与外标法实测值之间无明显差异。黄芩苷、汉黄芩苷、黄芩素及汉黄芩素的加样回收率平均值分别为99.5%、99.7%、100.5%、99.4%,相对标准偏差分别为1.3%、0.9%、1.6%及1.1%(n=6)。本研究表明一测多评法测定黄芩苷、汉黄芩苷、黄芩素及汉黄芩素方法专属性、精密度、稳定性、重复性和回收率均良好。结论一测多评法可用于复方黄白胶囊中4种黄酮成分的定量分析。  相似文献   

5.
黄芩及其有效成分的药理学研究进展   总被引:39,自引:3,他引:36  
张曦  李宏 《天津药学》2000,12(4):8-11
综述了黄芩及其有效成分黄芩苷、黄芩苷元、汉黄芩素、汉黄芩苷、黄芩新素Ⅰ和黄芩新素Ⅱ等黄酮类化合物的抗氧化、抗炎、抗变态、抗菌、抗病毒以及抗肿瘤等药理作用。  相似文献   

6.
汉黄芩素具有体内外抗肿瘤活性及良好的安全性。本文采用高效液相色谱串联质谱法研究了小鼠静脉注射汉黄芩素后肝脏中的代谢产物,鉴定了五个主要的代谢产物。建立了小鼠肝脏中汉黄芩素及其代谢产物汉黄芩素-7-O-葡萄糖醛酸苷的同时测定方法。肝匀浆经醋酸乙酯提取,在C18色谱柱上,采用甲醇-10 mm醋酸铵(80:20,v/v)为流动相,质谱检测采用负离子选择反应监测模式。肝组织中汉黄芩素与汉黄芩素-7-O-葡萄糖醛酸苷在0.2-40μg/g范围内呈良好线性关系,方法学评价表明本法适用于动物静脉注射汉黄芩素后体内的组织分布研究。  相似文献   

7.
目的:采用HPLC色谱法同时测定不同产地黄芩中黄芩苷、黄芩素、汉黄芩苷、汉黄芩素、去甲汉黄芩苷、千层纸素A苷的含量。方法:采用Agilent Zorbax SB-C18色谱柱(250 mm×4.6 mm,5 μm),以乙腈-0.1%磷酸水溶液梯度为流动相,流速1.0 mL·min-1,检测波长280 nm,柱温30℃。结果:黄芩苷、黄芩素、汉黄芩苷、汉黄芩素、去甲汉黄芩苷、千层纸素A苷的线性关系良好,平均回收率在98.70%~99.17%之间。结论:3批样品测定结果表明,采用该方法可以更简便、更准确定量黄芩总黄酮部位中6种主要化学成分。  相似文献   

8.
不同产地黄芩中的有效成份含量分析   总被引:5,自引:0,他引:5  
田建红 《海峡药学》2009,21(3):57-59
目的探讨不同产地黄苓中的黄芩苷、黄芩素、汉黄芩素的含量变化。方法制备供试品、对照品溶液,采用HPLC法,测定不同产地(河北承德、内蒙古自治区乌兰浩特、山西大同、吉林长白山)黄苓中黄苓苷、黄苓素、汉黄芩素的含量。结果黄芩苷、黄芩素、汉黄苓素含量测定方法的线性关系、重复性良好。精密度稳定。河北承德黄苓中黄芩苷含量最高,其次依次由高到低为:山西大同、吉林长白山、内蒙古自治区乌兰浩特;内蒙呼兰浩特的黄芩素、汉黄芩素含量最低,表明该地区收购的黄芩野生黄芩相对较多,其他产地的黄芩的黄芩素、汉黄芩素含量由高到低为:河南承德、山西大同、吉林长白山。结论不同产地的黄芩苷、黄芩素、汉黄苓素含量不同,临床用药应根据不同病症、不同产地调整药物剂量。  相似文献   

9.
目的:研究汉黄芩素对人喉癌Hep-2细胞增殖、凋亡及侵袭能力的影响,并探讨其作用机制。方法运用CCK-8检测汉黄芩素对人喉癌Hep-2细胞增殖活性的影响。运用流式细胞仪检测汉黄芩素对人喉癌Hep-2细胞凋亡的影响。运用Hoechst染色法检测汉黄芩素对人喉癌Hep-2细胞核形态变化的影响。运用transwell侵袭实验比较汉黄芩素对人喉癌Hep-2细胞侵袭能力的影响。运用Western blot检测汉黄芩素对人喉癌Hep-2细胞hTERT、Bcl-2、Bax蛋白表达水平的影响。结果 CCK-8法发现汉黄芩素能抑制人喉癌Hep-2细胞增殖,其作用呈浓度依赖性。流式细胞术分析发现汉黄芩素能诱导人喉癌Hep-2细胞发生凋亡。 Hoechst染色发现汉黄芩素能诱导人喉癌Hep-2细胞核形态变化。 Transwell实验发现汉黄芩素能抑制人喉癌Hep-2细胞的体外侵袭能力。 Western blot 检测发现测汉黄芩素能有效降低人喉癌Hep-2细胞hTERT、Bcl-2蛋白表达水平以及增加Bax蛋白表达水平( P <0.05)。结论汉黄芩素在体外能够有效抑制人喉癌Hep-2细胞增殖,诱导细胞凋亡,同时抑制喉癌细胞的体外侵袭能力。其作用可能与调控Bcl-2蛋白家族及hTERT蛋白表达水平相关。  相似文献   

10.
变换波长HPLC法同时测定藿香鼻炎合剂中五种成分的含量   总被引:1,自引:0,他引:1  
目的建立HPLC波长切换联合梯度洗脱法同时测定藿香鼻炎合剂中的广藿香酮、黄芩苷、汉黄芩苷、黄芩素和汉黄芩素含量的方法。方法采用Kromasil C_(18)(4.6 mm×250 mm,5μm)色谱柱;流动相A:乙腈,流动相B:0.4%磷酸溶液,进行梯度洗脱;流速:1.0 mL/min;柱温:30℃;检测波长分别规定为310 nm(广藿香酮)、280 nm(黄芩苷、汉黄芩苷、黄芩素和汉黄芩素)。结果广藿香酮、黄芩苷、汉黄芩苷、黄芩素和汉黄芩素的线性范围分别为4.300~86.00μg/mL(r=0.999 6)、15.87~317.4μg/mL(r=0.999 8)、6.920~138.4μg/mL(r=0.9999)、6.340~126.8μg/mL(r=0.999 4)、5.250~105.0μg/mL(r=0.999 8),平均加样回收率和RSD均符合中国药典规定。结论本文建立的HPLC波长切换联合梯度洗脱法同时测定广藿香酮、黄芩苷、汉黄芩苷、黄芩素和汉黄芩素5个成分,方法专属性强,重复性好,可作为藿香鼻炎合剂全面可靠的质量控制方法。  相似文献   

11.
Wogonin (5,7-dihydroxy-8-methoxyflavone) has been reported to exhibit a variety of biological properties including anti-inflammatory and neuroprotective functions. In this study, biological activities of diverse synthetic wogonin derivatives have been evaluated in two experimental cell culture models. Inhibitory activities of wogonin derivatives on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in BV2 microglial cells and on hydrogen peroxide (H2O2)-induced neuronal cell death in SH-SY5Y human neuroblastoma were examined. Wogonin derivatives such as WS2 and WS3 showed more potent suppressive activities on LPS-induced NO production and H2O2-induced cytotoxicity than wogonin itself. In addition, thiol substitution played a minor role in enhancing the activities of the derivatives. These findings may contribute to the development of novel anti-inflammatory and neuroprotective agents derived from wogonin.  相似文献   

12.
Guo Q  Zhao L  You Q  Yang Y  Gu H  Song G  Lu N  Xin J 《Antiviral research》2007,74(1):16-24
The traditional Chinese medicine Scutellaria radix has been used for thousands of years, mainly for the treatment of inflammatory conditions including hepatitis. The major active constituent, wogonin (WG), isolated from S. radix has attracted increasing scientific attention in recent years due to its potent biological activities. However, pharmacologic studies have primarily been focused on wogonin's anti-inflammatory and anti-cancer activities. In this study, we have investigated wogonin's anti-hepatitis B virus (HBV) activity both in vitro and in vivo. In the human HBV-transfected liver cell line HepG2.2.15, wogonin effectively suppressed the secretion of the HBV antigens with an IC(50) of 4 microg/ml at day 9 for both HBsAg and HBeAg. Consistent with the HBV antigen reduction, wogonin also reduced HBV DNA level in a dose-dependent manner. Duck hepatitis B virus (DHBV) DNA polymerase was dramatically inhibited by wogonin with an IC(50) of 0.57 microg/ml. In DHBV-infected ducks wogonin dosed i.v. once a day for 10 days reduced plasma DHBV DNA level with an ED(50) of 5mg/kg. The in vivo anti-HBV effect of wogonin in ducks was confirmed by Southern blotting of DHBV DNA in the liver. Histopathological evaluation of the liver revealed significant improvement by wogonin. In addition, in human HBV-transgenic mice, wogonin dosed i.v. once a day for 10 days significantly reduced plasma HBsAg level. Immunohistological staining of the liver confirmed the HBsAg reduction by wogonin. In conclusion, our results demonstrate that wogonin possesses potent anti-HBV activity both in vitro and in vivo. Currently, wogonin is under early development as an anti-HBV drug candidate.  相似文献   

13.
Baicalin, baicalein, wogonoside and wogonin are flavone constituents of Scutellariae Radix with various beneficial biological activities. The purpose of this study was to investigate the urinary pharmacokinetics of these flavones after oral administration of Scutellariae Radix commercial powder. Ten healthy male volunteers received a dose of 5.2 g commercial powder (comparable to 9 g crude drug), respectively. The concentrations of baicalin, baicalein and wogonin in the commercial powder as well as their metabolites in urine were assayed by HPLC method. The glucuronides and sulfates of baicalein and wogonin in urine were hydrolyzed with beta-glucuronidase and sulfatase, respectively. Our results showed that the mean cumulated renal excretion of baicalein glucuronides and sulfates were 43.1+/-4.5 micromol (2.9% of dose) and 64.8+/-6.3 micromol (4.3% of dose), respectively, whereas wogonin glucuronides and sulfates were 21.6+/-2.0 micromol (5.9% of dose) and 20.7+/-1.7 micromol (5.7% of dose), respectively. The result indicated that the renal excretion of conjugated metabolites of wogonin (11.6% of dose) were higher than that of baicalein (7.2% of dose). The baicalein sulfates was predominant than the corresponding glucuronides, whereas wogonin sulfates was comparable to the corresponding glucuronides.  相似文献   

14.
A number of wogonin derivatives have been synthesized as congeners of wogonin and evaluated for their inhibitory activities of PGE2 production. Wogonin derivatives modified at the B ring of wogonin were obtained from 2,4-Dihydroxy-3,6-dimethoxyacetophenone (1) via several steps. Most wogonin derivatives exhibited much reduced inhibitory activities against COX-2 catalyzed PGE2 production compared to that of wogonin. Alkylation of 5,7-phenol groups and substitution at the B ring of wogonin generally caused reduction of inhibitory activity.  相似文献   

15.
A number of thioflavones has been synthesized and evaluated for their iNOS inhibitory activities. Thiowogonin (6) was obtained from naturally occurring chrysin in 5 steps. Other thioflavones were prepared from the corresponding flavones in a single step by the reaction with Lawesson's reagent. The biological activities of thioflavones were not enhanced by the functional group conversion from carbonyl to thiocarbonyl. Compounds 11 and 13 showed potent NO inhibitory activity at high concentration (40 uM), leading to the possible development of novel neuroprotective agents based on wogonin.  相似文献   

16.
Flavonoids are widely distributed in plants, but their biological functions are still unclear. In the present study, in vitro and in vivo experiments were performed to demonstrate the inhibitory activities of rutin, wogonin, and quercetin on lipopolysaccharide-induced nitric oxide (NO) and prostaglandin E(2) production in RAW 264.7 macrophages, primary peritoneal macrophages, and Balb/c mice, respectively. In vitro results showed that wogonin and quercetin dose-dependently suppressed lipopolysaccharide-induced NO production in RAW 264.7 macrophages and primary peritoneal macrophages without a notable cytotoxic effect on either cell types associated with a decrease in inducible nitric oxide synthase (iNOS) protein expression in both cells. Rutin, at 80 microM only, had a slight but obvious inhibitory effect on lipopolysaccharide-induced NO production in primary peritoneal macrophages. Both wogonin and quercetin attenuated lipopolysaccharide-induced prostaglandin E(2) production in vitro. Intravenous injection of lipopolysaccharide (10 mg/kg, i.v.) resulted in a time-dependent induction of NO production in serum, and pretreatment with the L-arginine analog N-nitro-L-arginine methyl ester (L-NAME) blocked this induction. Intravenous pretreatment of Balb/c mice with rutin, wogonin or quercetin for 1 h followed by lipopolysaccharide treatment significantly inhibited lipopolysaccharide-induced NO production, but no inhibition of prostaglandin E(2) production was found. A decrease in iNOS protein, but not cyclooxygenase-2 protein, was detected in liver and lung specimens of lipopolysaccharide-treated Balb/c mice in the presence of rutin, wogonin or quercetin. In conclusion, data obtained both in vitro and in vivo suggest that wogonin and quercetin exert inhibitory activity on lipopolysaccharide-induced NO production through suppression of iNOS expression.  相似文献   

17.
In previous studies, we identified sedative effects of Scutellaria baicalensis extracts and found that these extracts or their constituents may also have anticonvulsive effects. Wogonin is a natural product isolated from S. baicalensis, which possesses central nervous system effects such as anxiolytic and neuroprotective activities. In this study, we investigated the effects of wogonin on convulsion related behaviors, such as myorelaxation, motor coordination, and anticonvulsant effects of wogonin on chemical induced seizure and electroshock seizure in mice or rats. The effect of wogonin on membrane potential was also observed. Wogonin was intraperitoneally injected into mice or rats 30 min prior to testing. Animals treated with wogonin did not change locomotor activities as well as endurance times on the rota-rod, which indicates that wogonin did not cause a sedative and myorelaxation effect. Wogonin significantly blocked convulsion induced by pentylenetetrazole and electroshock but not convulsion induced by strychnine. Wogonin also significantly reduced the electrogenic response score, but flumazenil treatment reversed this decrease to the level of the control group. The wogonin treatment increased Cl(-)influx into the intracellular area as dose increased. Flumazenil and bicuculline treatment, however, inhibited the Cl(-) influx induced by wogonin. These results indicate that the anticonvulsive effects produced by wogonin were mediated by the GABAergic neuron.  相似文献   

18.
A number of 8-arylflavones have been synthesized as congeners of wogonin and evaluated for their inhibitory activities of PGE2 production. 8-Arylflavones were obtained from commercially available chrysin via two different synthetic pathways. Most 8-arylflavones exhibited much reduced inhibitory activities against COX-2 catalyzed PGE2 production compared to that of wogonin. Functional group replacement at the 8-position of wogonin from methoxy to aryl group caused loss of inhibitory activity. Our present results imply that the functional group at the 8-position of flavones seems to play very important roles for bioactivity.  相似文献   

19.
Bisphenol‐A‐glycidyldimethacrylate (BisGMA) is a frequently used monomer in dental restorative resins. However, BisGMA could leach from dental restorative resins after polymerization leading to inflammation in the peripheral environment. Wogonin, a natural flavone derivative, has several benefits, such as antioxidative, anti‐inflammatory and neuroprotective properties. Pretreatment of macrophage RAW264.7 cells with wogonin inhibited cytotoxicity which is induced by BisGMA in a concentration‐dependent manner. BisGMA induced apoptotic responses, such as redistribution of phosphatidylserine from the internal to the external membrane and DNA fragmentation, were decreased by wogonin in a concentration‐dependent manner. In addition, BisGMA‐induced genotoxicity, which detected by cytokinesis‐blocked micronucleus and single‐cell gel electrophoresis assays, were inhibited by wogonin in a concentration‐dependent manner. Furthermore, wogonin suppressed BisGMA–induced activation of intrinsic caspase pathways, such as caspases‐3 and ?8. Parallel trends were observed in inhibition of caspase‐3 and ?8 activities, apoptosis, and genotoxicity. These results indicate wogonin suppressed the BisGMA‐induced apoptosis and genotoxicity mainly via intrinsic caspase pathway in macrophages. © 2014 Wiley Periodicals, Inc. Environ Toxicol 31: 176–184, 2016.  相似文献   

20.
To evaluate the protective effects of baicalein and wogonin against benzo[a]pyrene- and aflatoxin (AF) B(1)-induced toxicities, the effects of these flavonoids on the genotoxicities and oxidation of benzo[a]pyrene and AFB(1) were studied in C57BL/6J mice. Baicalein and wogonin reduced benzo[a]pyrene and AFB(1) genotoxicities as monitored by the umuC gene expression response in Salmonella typhimurium TA1535/pSK1002. Baicalein added in vitro decreased liver microsomal benzo[a]pyrene hydroxylation (AHH) activity with an ic(50) of 33.9 +/- 1.4 microM at 100 microM benzo[a]pyrene. Baicalein also inhibited AFQ(1) and AFB(1)-epoxide formation from AFB(1) (50 microM) oxidation (AFO) with ic(50) values of 22.8 +/- 1.4 and 5.3 +/- 0.8 microM, respectively. However, the in vitro inhibitory effects of wogonin on AHH and AFO activities in liver microsomes were less than those of baicalein as inhibition by 500 microM wogonin was only about 51-65%. Treatment of mice with liquid diets containing 5 mM baicalein and wogonin resulted in 22 and 49% decreases in hepatic AHH activities, respectively. Baicalein treatment resulted in 39 and 32% decreases in AFQ(1) and AFB(1)-epoxide formation from liver microsomal AFO, respectively. Wogonin treatment resulted in 39 and 47% decreases in AFQ(1) and AFB(1)-epoxide formation, respectively. A 1-week pretreatment with wogonin significantly decreased hepatic DNA adduct formation in mice treated with 200 mg/kg of benzo[a]pyrene via gastrogavage. These in vitro and in vivo effects suggested that baicalein and wogonin might have beneficial effects against benzo[a]pyrene- and AFB(1)-induced hepatic toxicities and that wogonin had a stronger protective effect in vivo.  相似文献   

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