车前草不同药用部位抗炎、抗肿瘤、抗氧化的活性研究

目的：探究车前草不同药用部位抗炎、抗肿瘤及抗氧化作用活性差异,为进一步明确车前草不同药用部位的合理使用,扩大车前草临床用药,更好地开发利用车前草资源提供理论参考。方法：采用高效液相色谱法,以乙腈-0.2%甲酸水溶液为流动相进行梯度洗脱,建立车前根、车前叶、车前子及除去根、叶、子剩余部位的指纹图谱;采用脂多糖（LPS）诱导小鼠Raw 264.7细胞炎症模型,噻唑蓝（MTT）法测定细胞活力,Griess法测定细胞分泌一氧化氮（NO）的水平检测车前草不同药用部位抗炎活性;采用MTT法检测车前草不同药用部位抗肿瘤活性;采用1,1-二苯基-2-三硝基苯肼（DPPH）、2,2''-联氮-（3-乙基苯并噻唑-6-磺酸）二铵盐（ABTS）法检测车前草不同药用部位抗氧化活性。结果：车前草不同药用部位指纹图谱既有相似性,又存在一定差异性。药效学数据显示,车前草不同药用部位均具有较好的抗炎、抗肿瘤及抗氧化活性,其中抗炎和抗肿瘤活性车前叶活性最高,车前草剩余部位大于车前根,车前子活性相对较弱;抗氧化活性车前叶最高,车前根活性较低。结论：本研究明确了车前草不同药用部位醇提物指纹图谱及不同药用部位的抗炎、抗肿瘤及抗氧化活性差异,为进一步扩大车前草药材临床用药以及针对不同疾病合理利用不同药用部位精准用药研究提供一定的实验依据,为车前草药用资源的高效合理利用及药用新资源的开发提供理论依据。     

知母不同药用部位体外抗肿瘤、抗炎及抗氧化的作用研究

目的：比较知母药材不同药用部位体外抗肿瘤、抗炎及抗氧化的作用,为知母进一步的合理应用和开发提供参考。方法:采用HPLC色谱法建立知母药材不同药用部位的指纹图谱,并进行相似度评价;采用MTT法研究知母不同药用部位对人胃癌HGC-27细胞、人肝Hepg-2细胞和人结肠癌Caco-2细胞体外增值抑制作用的影响;采用LPS诱导Raw 264.7细胞炎症模型,MTT法测定细胞活力,Griess试剂盒测定细胞分泌一氧化氮（NO）的水平,探讨知母不同药用部位的体外抗炎活性;采用二苯基苦酰肼基（DPPH）、2,2′-连氨-(3-乙基苯并噻唑啉-6-磺酸)二氨盐（ABTS）自由基清除法观察知母不同药用部位的体外抗氧化作用。结果：HPLC指纹图谱显示,知母4个不同药用部位根、茎、叶、花的化学成分具有一定的差异性;体外药效结果显示,知母不同药用部位作用于不同肿瘤细胞后均呈现不同程度的增值抑制作用,具有一定的差异性;知母不同药用部位均能促进RAW264.7巨噬细胞的增殖,不同药用部位对LPS诱导的巨噬细胞分泌一氧化氮均有不同程度的抑制作用;知母花对DPPH及ABST的清除能力最强,其它部位活性顺序依次为知母叶、茎、根。结论：知母根、叶、花为抗肿瘤有效药用部位;知母不同药用部位均具有显著的抗炎、抗氧化作用,以知母茎抗炎作用最强,知母花抗氧化作用最强;本研究为知母不同药用部位针对不同疾病的合理使用提供实验依据和实验方法。     

中药仙鹤草不同药用部位的体外药效学研究

目的：研究仙鹤草药材不同药用部位的体外抗氧化、抗肿瘤、抗凝血活性,为生药不同部位的合理应用奠定实验基础。方法：采用HPLC色谱法建立仙鹤草不同药用部位的指纹图谱;采用MTT比色法研究仙鹤草不同药用部位对人肝癌细胞株HepG2细胞、人胃癌细胞株HGC-27细胞、人结肠癌细胞株Caco-2细胞增殖作用的影响;采用2,2''-联氮-（3-乙基苯并噻唑-6-磺酸）二铵盐（ABTS）法、1,1-二苯基-2-三硝基苯肼（DPPH）法检测仙鹤草不同药用部位的抗氧化能力;采用ELISA法测定仙鹤草不同药用部位对小鼠凝血酶原（PT）指标的影响。结果：仙鹤草不同药用部位的指纹图谱之间存在明显差异,根、茎、叶、花均显示不同程度抗肿瘤、抗氧化、抗凝血药效,其中茎对HepG2、HGC-27、Caco-2三种癌细胞株的增殖抑制作用强于根、叶、花;叶、花清除DPPH、ABTS自由基的能力强于根、茎;茎、叶降低小鼠血浆凝血酶原水平的能力强于根、花。结论：仙鹤草不同药用部位的抗氧化、抗肿瘤、抗凝血药效存在差异,为仙鹤草药材以药效为导向的不同药用部位的合理使用提供实验依据,为生药不同部位的精准应用奠定实验基础。     

金银花的HPLC药效指纹图谱研究

目的找出金银花中与抗炎活性成正相关的化学成分,并以此建立金银花的药效指纹图谱。方法采用HPLC法分析,获得金银花不同提取部位的指纹图谱,同时选择小鼠耳肿胀抗炎实验测定不同提取部位的药理活性,以线性回归解释化学信息和药理活性的相关关系。结果以甲醇提取部位的药理活性最强,故以此部位的HPLC图谱来制定金银花的“药效谱”。结论采用该方法制定得到的金银花的药效指纹图谱更为科学、合理。     

中药小蓟不同药用部位体外抗炎、促凝血的作用研究

目的：研究小蓟不同部位化学成分的差异与抗炎、促凝血病症疗效关系,研究生药不同部位的精准应用。方法：使用HPLC色谱法建立不同部位的指纹图谱,MTT法测定不同部位提取物对炎症细胞RAW264.7增值的抑制作用,ELISA法测定不同部位提取物对小鼠凝血酶原（PT）指标的影响,并使用灰色关联软件,将色谱峰的峰面积与抗炎、凝血酶原指标相关联,得到各个成分的贡献率。结果：小蓟根、茎、叶、花中的成分种类与含量均有不同。在体外抗炎药效研究中,小蓟花的效果最好,对炎症细胞RAW264.7 的抑制率达到63.25%。小蓟根次之,小蓟叶与茎对炎症细胞的抑制作用不大。用ELISA法测定小鼠血浆中凝血酶原指标,小蓟花对指标影响最大,叶次之,茎与根对指标变化影响不大。灰色关联度计算软件结果显示,绿原酸、橙皮苷、咖啡酸、蒙花苷对抑制炎症细胞增值（抗炎）的相关程度分别为0.7250,0.5249,0.5105,0.5096。与升高凝血酶原指标（止血）的相关程度分别为0.5982,0.5088,0.5037,0.5034。其关联程度与其他成分相比,差距较大。结论：小蓟不同部位和抗炎、促凝血病症的药效存在差异,明确了生药小蓟不同部位的精准应用。     

菊花、叶、茎抗氧化活性比较

目的:研究菊花、叶和茎的体外抗氧化活性,为菊花、叶、茎资源的充分利用提供科学依据。方法:以绿原酸为对照组(CHA),分为菊花水提物组(JH-S),菊花醇提物组(JH-C),菊叶水提物组(JY-S),菊叶醇提物组(JY-C),菊花茎水提物组(JJ-S),菊花茎醇提物组(JJ-C),分别测定提取物的还原能力及对羟基自由基(·OH),二苯代苦味酰基自由基(DPPH·),脂自由基和超氧阴离子(O-2·)的清除率,研究其体外抗氧化活性。结果:菊花,叶,茎提取物和绿原酸的抗氧化作用与浓度呈正相关。菊花、叶、茎的水、醇提取物(0.20 g·L-1)和绿原酸相比,还原能力分别为2.260,2.270,2.261,2.260,2.261,2.272,2.256均无差异,且各醇提物和水提物之间也无差异;对·OH,O-2·均具较强的清除作用,且水提物的作用均好于其醇提物,尤其抗O-2·作用明显强于绿原酸清除DPPH·,脂自由基方面效果均优于水提物,菊茎醇提取物对DPPH·清除率略高于绿原酸,相同浓度下菊叶清除脂自由基作用胜于菊花。结论:菊花、叶和茎提取物均有较强的抗氧化活性,菊叶抗氧化作用与菊花相当。菊叶和茎作为天然抗氧化剂有较好的开发利用价值。     

陈皮不同提取物及橙皮苷部位的抗炎活性比较研究

目的：比较研究陈皮醇提物、陈皮水提物及橙皮苷部位的抗炎活性。方法：用1μg／mL的脂多糖（LPS）处理RAW264．7细胞,建立炎症模型,采用NO试剂盒检测各实验样品对模型细胞NO释放量的影响;采用MTT法测定细胞活力。结果及结论：陈皮醇提物、陈皮水提物及橙皮苷部位均具有显著抗炎活性,且陈皮醇提物、陈皮水提物的抗炎活性优于橙皮苷部位。     

青翘不同极性部位抗炎作用的谱效关系分析

目的:建立青翘水提物及其不同极性部位的指纹图谱,阐明各部位共有峰所代表的化学成分对抗炎药效贡献的大小,揭示其药效物质基础。方法:采用HPLC建立青翘各部位的指纹图谱,流动相乙腈-0.1%甲酸水溶液梯度洗脱,检测波长235 nm。通过青翘不同部位样品对急性肺损伤模型大鼠3个药效评价指标肿瘤坏死因子-α(TNF-α),白细胞介素-6(IL-6)及IL~(-1)β的抑制作用来反映其抗炎活性,利用灰色关联与双变量相关分析方法建立谱效关系。结果:灰色关联分析得出7个对药效贡献较大的峰,分别为23,25,31,29,24,26,30号峰。双变量相关分析显示23号峰含量变化与TNF-α呈极显著负相关;18,13号峰含量变化与IL-6呈极显著和显著性负相关;22号峰含量变化与IL~(-1)β呈极显著性负相关;7,13和6号等峰含量变化与IL~(-1)β呈显著负相关。这些色谱峰所代表的化学成分含量越高,降低TNF-α,IL-6及IL~(-1)β的效果越显著,发挥的抗炎效果越好。结论:23,13,25和31号等色谱峰对青翘抗炎药效的贡献最大。建立的HPLC指纹图谱方法简便、重复性良好。初步证明青翘的抗炎药效物质主要集中在乙酸乙酯部位,为中等极性的成分,抗炎作用是这些成分共同作用的结果。     

虎杖HPLC指纹图谱及抗痛风性关节炎活性谱效关系研究

目的 建立虎杖Polygonum cuspidatum的HPLC指纹图谱,研究虎杖醇提物的HPLC指纹图谱与抗痛风性关节炎活性之间的谱效关系,初步明确虎杖抗痛风性关节炎主要活性成分.方法 采用HPLC法建立虎杖的指纹图谱;使用"中药色谱指纹图谱相似度指纹评价系统(2004 A版)"进行相似度评价;以小鼠足垫厚度、血清尿...     

小海马 DPPH 自由基清除作用及 HPLC 指纹图谱研究

 目的 采用体外 1 , 1- 二苯基苦基苯肼（ DPPH ）抗氧化模型对海马提取物的抗氧化性质进行评价,并建立小海马 HPLC 特征指纹图谱,用于小海马药材的鉴别及质量评价。 方法 利用离线 DPPH 抗氧化评价体系对海马不同提取物进行评价,结果表明,海马水提物抗氧化能力最强,在此基础上又探明了海马水提物抗氧化能力随时间和浓度的变化规律,为海马抗氧化活性提供了科学依据。依据抗氧化活性实验结果,建立了海马水提物 HPLC 特征指纹图谱分析方法。 结果 海马水提物大部分化合物达到基线分离,方法的精密度、重现性、稳定性良好;建立小海马药材 HPLC 指纹图谱,采用中药指纹图谱相似度计算软件,对小海马进行真伪辨别和质量评价。 结论 表明该方法简捷、有效,是小海马药材鉴别及质量控制的有效方法。     

茜草不同部位饮片炒炭前后总蒽醌含量比较

目的：对不同部位及不同炒炭程度的茜草饮片中总蒽醌含量进行比较，为制定合理的茜草饮片炮制工艺和质量指标提供实验依据。方法：酸水解，碱显色和比色法测定总蒽醌的方法。结果：茜草饮片以细根中总蒽醌含量最高；炒炭后含量减少，且随温度升高含量降低明显。结论：茜草饮片切制应注意区分不同部位，炒炭应控制炮制温度及时间。     

Evaluation of the anti-proliferative properties of selected psoriasis-treating Chinese medicines on cultured HaCaT cells

Psoriasis is a chronic inflammatory skin disorder, which affects approximately 2-3% of the population worldwide. The current conventional therapy cannot offer satisfactory clinical results for most of the patients, largely due to the fact that many anti-psoriatic drugs have serious side effects and psoriasis is prone to developing drug resistance after long term exposure. Traditionally, Chinese herbal medicine has been extensively used to treat psoriasis and produced promising clinical results; however, its underlying mechanisms of action have not been systematically investigated. The aim of this study was to investigate those Chinese medicinal materials, which are commonly prescribed in Chinese medicine practice for psoriasis, for their anti-proliferative effects on HaCaT cells in vitro. Sixty Chinese medicinal materials were selected and extracted with 80% aqueous ethanol. The dry extracts were evaluated for their anti-proliferative activities by microplate SRB and MTT assays. Three Chinese medicinal materials i.e. the root of Rubia cordifolia L. (Rubiaceae), Realgar and the rhizome of Coptis chinensis Franch. (Ranunculaceae) were found to have significant anti-proliferative effects, with IC(50) being 1.4, 6.6 and 23.4 microg/ml, respectively as measured by MTT assay. While Realgar was also able to modestly inhibit the growth of Hs-68 cells in vitro, Rubia cordifolia and Coptis chinensis did not exert cytotoxicity to this human fibroblast cell line.     

Evaluation of antioxidant and nitric oxide inhibitory activities of selected Malaysian medicinal plants

Methanol extracts of seven Malaysian medicinal plants were screened for antioxidant and nitric oxide inhibitory activities. Antioxidant activity was measured by using FTC, TBA and DPPH free radical scavenging methods and Griess assay was used for the measurement of nitric oxide inhibition in lipopolysaccharide (LPS) and interferon-gamma (IFN-gamma)-treated RAW 264.7 cells. All the extracts showed strong antioxidant activity comparable to or higher than that of alpha-tocopherol, BHT and quercetin in FTC and TBA methods. The extracts from Leea indica and Spermacoce articularis showed strong DPPH free radical scavenging activity comparable with quercetin, BHT and Vit C. Spermacoce exilis showed only moderate activity but other species were weak as compared to the standards. In the Griess assay Lasianthus oblongus, Chasalia chartacea, Hedyotis verticillata, Spermacoce articularis and Leea indica showed strong inhibitory activity on nitric oxide production in LPS and IFN-gamma-induced RAW 264.7 cells. Extracts from Psychotria rostrata and Spermacoce exilis also inhibited NO production but this was due to their cytotoxic effects upon cells during culture.     

Antioxidant, anti-inflammatory and antiproliferative activities of Kalanchoe gracilis (L.) DC stem

Oxidative stress and inflammation are related to several chronic diseases including cancer and atherosclerosis. Kalanchoe gracilis (L.) DC is a special folk medicinal plant in Taiwan. The aim of this study was to evaluate the antioxidant, anti-inflammatory and antiproliferative activities of the methanolic extract and fractions of the stem of K. gracilis. TEAC, total phenolic compound content, total flavonoid content, DPPH radical scavenging activity, reducing power, inhibition of NO production in LPS-induced RAW264.7 cells, and inhibition of cancer cell proliferation were analyzed. Among all fractions, the chloroform fraction showed the highest TEAC and DPPH radical scavenging activities. The chloroform fraction also had the highest content of polyphenols and flavonoids. Chloroform fractions also decreased LPS-induced NO production and expressions of iNOS and COX-2 in RAW264.7 cells. The antiproliferative activities of the methanolic extract and fractions were studied in vitro using HepG2 cells, and the results were consistent with their antioxidant capacities. Chloroform fractions had the highest antiproliferative activity with an IC(50) of 136.85 ± 2.32 μg/ml. Eupafolin also had good pharmacological activity in the antioxidant, anti-inflammation and antiproliferative. Eupafolin might be an important bioactive compound in the stem of K. gracilis. The above experimental data indicated that the stem of K. gracilis is a potent antioxidant medicinal plant, and such efficacy may be mainly attributed to its polyphenolic compounds.     

Antioxidant, anti-inflammatory, and antiproliferative activities of Taxillus sutchuenensis

Inflammation is related to several chronic diseases, including cancer and atherosclerosis. Taxillus sutchuenensis (Lecomte) Danser is a special folk medicinal plant in Taiwan. The aim of this study was to evaluate the antioxidant, anti-inflammatory, and antiproliferative activities of the aqueous-thanol extract from T. sutchuenensis (AETS) and its fractions. TEAC, DPPH radicals, total phenolic compounds, total flavonoid content, inhibition of NO production in LPS-induced RAW264.7 cells, and inhibition of cancer cell proliferation were tested. Among all fractions, the ethyl-acetate (EA) fraction showed the highest TEAC and DPPH radical scavenging activities. The EA fraction also had the highest polyphenol and flavonoid content. The EA fractions also decreased LPS-induced NO production and the expression of iNOS and COX-2 in RAW264.7 cells. The antiproliferative activities of the aqueous/ethanol extract and fractions were studied in vitro using A549 cells, and the results were consistent with their antioxidant capacities. EA fractions had the highest antiproliferative activity with an IC(50) of 454.38 ± 1.48 μg/ml. Quercetin also had antioxidant, anti-inflammatory, and antiproliferative activities. Quercetin might be an important bioactive compound in T. sutchuenensis. The experimental data indicated that T. sutchuenensis is a potent antioxidant medicinal plant, and such efficacy may be mainly attributed to its polyphenolic compounds.