共查询到20条相似文献,搜索用时 218 毫秒
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目的:探讨玉竹的药理作用,为进一步开发利用玉竹提供参考。方法:通过查阅国内外文献,对玉竹的药理作用进行归纳总结。结果:发现玉竹具有抗氧化、降血糖、抗肿瘤、调节免疫、抑菌、护肝、抗疲劳、抗炎等广泛的药理作用。其中关于玉竹的抗氧化、对血糖的影响及其对免疫调节的作用研究较多,提示玉竹具有较大的开发利用价值。结论:玉竹药理作用广泛,具有广阔的开发前景。 相似文献
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冬虫夏草的降血糖、抗肿瘤、免疫调节及其水提液抗脂质过氧化损伤作用都较为显著。近年来,冬虫夏草对细胞凋亡的影响越来越受到人们关注,笔者就其降血糖、抗肿瘤、免疫调节、抗氧化等药理作用,并对其影响细胞凋亡的作用方式予以综述。 相似文献
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黄芩药理作用研究进展 总被引:2,自引:0,他引:2
黄芩及其有效成分黄酮类化合物具有广泛的药理活性,如抗菌、抗病毒、抗炎、抗肿瘤、抗氧化、清除自由基、免疫调节以及对缺血性再灌注损伤等。对黄芩药理作用的研究进行综述,为今后的实验研究及临床的合理应用提供思路和依据。 相似文献
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民族药白藜芦醇药理作用研究新进展 总被引:1,自引:0,他引:1
邓伟峰 《中国民族医药杂志》2007,13(11):56-59
白藜芦醇具有广泛的药理活性,近年来受到人们的广泛关注。研究表明:白藜芦醇具有抗肿瘤、抗肝纤维化、体外抗氧化、抗炎等药理作用,本文就近年来白藜芦醇药理作用研究进展进行综述。 相似文献
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Bryonolic acid (BA) (1) is a naturally occurring triterpenoid with pleiotropic properties. This study characterizes the mechanisms mediating the anti-inflammatory and antioxidant activities of BA and validates the utility of BA as a tool to explore the relationships between triterpenoid structure and activity. BA reduces the inflammatory mediator NO by suppressing the expression of the inflammatory enzyme inducible nitric oxide synthase (iNOS) in LPS-activated RAW 264.7 macrophage cells. In addition, BA robustly induces the antioxidant protein heme oxygenase-1 (HO-1) in vitro and in vivo in an Nrf2-dependent manner. Further analyses of Nrf2 target genes reveal selectivity for the timing and level of gene induction by BA in treated macrophages with distinct patterns for Nrf2-regulated antioxidant genes. Additionally, the distinct expression profile of BA on Nrf2 target genes relative to oleanolic acid suggests the importance of the triterpenoid scaffold in dictating the pleiotropic effects exerted by these molecules. 相似文献
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目的:研究黄芩苷对糖尿病大鼠的降血糖作用及其对大鼠小肠二糖酶的影响。方法:用大鼠小肠刷状缘膜匀浆分析黄芩苷对二糖酶活性的抑制作用;测定黄芩苷对正常小鼠蔗糖负荷糖耐量的影响;观察腹腔注射65mg.kg^-1链脲佐菌素(Streptozotocin,STZ)诱导的糖尿病大鼠用黄芩苷100和200mg.kg^-1治疗4周后,蔗糖负荷糖耐量,实验结束后,分析十二指肠、空肠和回肠黏膜中蔗糖酶的活力。结果:黄芩苷对蔗糖酶活性有抑制作用,对麦芽糖酶活性无抑制作用:正常小鼠灌胃给予黄芩苷后,显著降低蔗糖引起的血糖水平升高。糖尿病大鼠灌胃给予黄芩苷周后,黄芩苷显著降低糖尿病大鼠的血糖水平,减缓糖尿病大鼠体重降低的趋势,同时黄芩苷显著降低糖尿病导致的蔗糖酶活力增强。结论:黄芩苷降低血糖的机制之一可能是抑制小肠蔗糖酶的活性。 相似文献
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Baicalein Triggers Autophagy and Inhibits the Protein Kinase B/Mammalian Target of Rapamycin Pathway in Hepatocellular Carcinoma HepG2 Cells
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Ya‐Fang Wang Ting Li Zheng‐Hai Tang Lin‐Lin Chang Hong Zhu Xiu‐Ping Chen Yi‐Tao Wang Jin‐Jian Lu 《Phytotherapy research : PTR》2015,29(5):674-679
Baicalein (BA), isolated from the Chinese medicinal herb Scutellariae radix (Huangqin in Chinese), is a flavonoid with various pharmacological effects. Herein, we found that BA only slightly reduced the cell viability on HepG2 cells after 24‐h treatment as determined by 3‐(4, 5‐dimethylthiazol‐2‐yl)‐2, 5‐diphenyl tetrazolium bromide (MTT) assay. However, BA (50 μM) effectively blocked the colony formation. Meanwhile, BA remarkably induced the formation of autophagosomes after 24‐h treatment as determined by immunofluorescence with monodansylcadaverine staining as well as transmission electron microscopy, respectively. Moreover, BA obviously up‐regulated the expression of microtubule‐associated protein 1A/1B‐light chain 3‐II in concentration‐dependent and time‐dependent manners in HepG2 cells. When combined with the autophagy inhibitor chloroquine and BA, the cell viability and colony formation were significantly decreased, indicating that BA triggered protective autophagy, which prevented cell death. Further study showed that BA concentration‐dependently and time‐dependently decreased the expression of p‐AKT (S473), p‐ULK1 (S757) and p‐4EBP1 (T37 and S65), suggesting the involvement of protein kinase B (AKT)/mammalian target of rapamycin (mTOR) in BA‐triggered autophagy. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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刺五加叶柄的体细胞胚胎发生研究 总被引:3,自引:1,他引:2
目的 以来源广泛、原植物药用成分量可测定的刺五加叶柄为外植体,研究刺五加体细胞胚胎发生情况,为实现药用成分高产刺五加的快速繁殖奠定基础.方法 以3年生植株萌发15 d以内的刺五加复叶叶柄为外植体,考察2,4-D和BA对刺五加体细胞胚胎发生的影响.结果 28 d培养后,2,4-D 1.5 mg/L+BA 1.0 mg/L处理的叶柄外植体中71.4%直接产生或经由愈伤组织间接产生了8.5个体胚.两种产生方式均可在诱导培养基中进行,但间接发生比例较少.转入相同或降低2,4-D质量浓度的培养基后,体胚渐次发育成熟.同时新的体胚也在逐渐产生,经由间接途径产生的体胚所占比例也随之上升.结论 刺五加可以通过萌发15 d以内的复叶叶柄外植体实现体细胞胚胎发生,体胚诱导率取决于2,4-D和BA的质量浓度. 相似文献
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目的在中药现代化的进程中,对中医药体系中的传统药效的现代药理学解释是一项有深远意义的工作。本实验设计了3种方法,在总体上对中药的传统药效与中药的现代药理活性进行对比分析,从中发现规律,对被研究的中药药效给出言之有据的解释。方法收集大量中药传统药效、中药现代药理活性和中药所含活性化合物现代药理活性数据,通过统计方法寻找特定中药药效类别(泻下和解表)的现代药理学的特征,从而得到其现代药理学解释。结果使用的3种方法都能够给出与2种药效相关的现代药理活性。汇总3种结果得到,泻下与导泄、兴奋胃肠平滑肌、止血和利尿4种药理活性相关;解表与抗凝血/抗血栓、止痛、解热3种药理作用相关。3种方法比较,共有化合物方法结果比较好。结论对大量中药的传统药效和它们的现代药理活性数据进行比对分析,可以得到中药药效的现代药理解释。这种方法可以推广到对其他中药传统药效的研究中,对中医药的现代化进程起到推动作用。 相似文献
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Psidium guajava, is an important food crop and medicinal plant in tropical and subtropical countries is widely used like food and in folk medicine around of the world. This aims a comprehensive of the chemical constituents, pharmacological, and clinical uses. Different pharmacological experiments in a number of in vitro and in vivo models have been carried out. Also have been identified the medicinally important phyto-constituents. A number of metabolites in good yield and some have been shown to possess useful biological activities belonging mainly to phenolic, flavonoid, carotenoid, terpenoid and triterpene. Extracts and metabolites of this plant, particularly those from leaves and fruits possess useful pharmacological activities. A survey of the literature shows P. guajava is mainly known for its antispasmodic and antimicrobial properties in the treatment of diarrhoea and dysentery. Has also been used extensively as a hypoglycaemic agent. Many pharmacological studies have demonstrated the ability of this plant to exhibit antioxidant, hepatoprotection, anti-allergy, antimicrobial, antigenotoxic, antiplasmodial, cytotoxic, antispasmodic, cardioactive, anticough, antidiabetic, antiinflamatory and antinociceptive activities, supporting its traditional uses. Suggest a wide range of clinical applications for the treatment of infantile rotaviral enteritis, diarrhoea and diabetes. 相似文献