不同激素配比对远志愈伤诱导及其黄酮积累的影响

目的:研究不同激素配比对远志根、茎、叶愈伤组织诱导的影响,并对远志根、茎、叶愈伤组织中的黄酮量进行测定分析。方法:以MS为基本培养基,分别以远志无菌苗的根、茎、叶为外植体,应用正交试验法确定2,4-二氯苯氧乙酸(2,4-D),萘乙酸(NAA),6-苄氨基嘌呤(6-BA)这3种激素对远志根、茎、叶不同部位愈伤组织诱导及其黄酮积累量的影响。结果:2,4-D,NAA,6-BA对远志根、茎、叶愈伤诱导率均有显著影响。叶的最佳愈伤诱导组合为MS+3. 0 mg·L~(-1)2,4-D+1. 0 mg·L~(-1)NAA+1. 5 mg·L~(-1)6-BA;茎的最佳愈伤诱导组合为MS+1. 0 mg·L~(-1)2,4-D+3. 0 mg·L~(-1)NAA+1. 5 mg·L~(-1)6-BA;根的最佳愈伤诱导组合为MS+1. 0 mg·L~(-1)2,4-D+1. 0 mg·L~(-1)NAA+1. 0 mg·L~(-1)6-BA。2,4-D,NAA,6-BA对远志茎愈伤组织中黄酮积累均影响显著,以MS+3. 0 mg·L~(-1)2,4-D+1. 0 mg·L~(-1)NAA+0. 5 mg·L~(-1)6-BA为最佳黄酮积累组合; NAA,6-BA对远志叶愈伤组织中黄酮积累影响均显著,而2,4-D则无明显影响,以MS+3. 0 mg·L~(-1)2,4-D+2. 0 mg·L~(-1)NAA+1. 0 mg·L~(-1)6-BA为最佳黄酮积累组合; 3种激素分别对远志根愈伤组织中黄酮积累无明显影响,以MS+2. 0 mg·L~(-1)2,4-D+1. 0 mg·L~(-1)NAA+1. 5 mg·L~(-1)6-BA为最佳黄酮积累组合。结论:在该条件下远志根、茎、叶愈伤组织诱导率均达100%,其中尤以远志叶愈伤组织长势最好,其次分别是远志茎和远志根。在该条件下远志根、茎、叶愈伤组织中黄酮量分别达到21. 31,24. 56,23. 61 mg·g-1。     

正交法优化植物生长调节剂在黄芪愈伤组织生长中的应用

目的 研究膜荚黄芪叶愈伤组织诱导、生长及黄芪多糖合成的最佳生长调节剂组合.方法 以膜荚黄芪叶为外植体,运用正交设计研究 6-BA、2,4-D 和 NAA 等3种植物生长调节剂组合对愈伤组织诱导、培养及黄芪多糖合成的影响.结果 分别以诱导率、相对生长速率和黄芪多糖含量为指标,结果表明 NAA 和 6-BA 对愈伤组织诱导率影响显著,6-BA、2,4-D 和 NAA 都对愈伤组织的生长影响显著,2,4-D 和 NAA 对黄芪多糖合成影响显著.结论 诱导愈伤组织的最佳培养基为:MS 2,4-D(0.5 mg·L-1) 6-BA(1.0 mg·L-1) NAA(2.0 mg·L-1);愈伤组织生长的最佳培养基为:MS 2,4-D(0.5 mg·L-1) 6-BA(2.0 mg·L-1) NAA(2.0 mg·L-1);促进黄芪多糖合成的最佳培养基为:MS 2,4-D(1.0 mg·L-1) 6-BA(1.0 mg·L-1) NAA(1.0 mg·L-1).     

野藤茶愈伤组织的诱导研究

目的探讨影响野藤茶愈伤组织诱导因素,建立野藤茶愈伤组织培养方法。方法以生长旺盛的野藤茶的叶、茎为外植体,采用组织培养方法,观察不同外植体、光照和植物生长物质种类及其配比对野藤茶愈伤组织诱导的影响。结果叶和茎都能诱导愈伤组织,25℃、暗培养有利于愈伤组织生长,6-苄氨基嘌呤(6-BA)与α-萘乙酸(NAA)和2,4-二氯苯氧乙酸(2,4-D)的配合使用有利于愈伤组织的诱导,出愈率可达86.1%。结论野藤茶愈伤组织的最适宜培养基为MS+6-BA 1.5 mg.L-1+NAA 8 mg.L-1+2,4-D 40 mg.L-1(pH 5.8)。     

叶下珠愈伤组织快速培养体系研究

目的:诱导叶下珠得到愈伤组织并对其培养条件进行优化。方法:以茎、叶、种子为外植体,以MS为基本培养基,考察不同外植体在不同外源激素及不同配比下愈伤组织的诱导率;以诱导条件下优化得到的激素配比为基础,通过改变激素NAA、2,4-D和6-BA的相对比例,考察叶下珠愈伤组织继代生长的最佳条件。结果:茎为最佳外植体;最佳诱导培养基为MS+0.1 mg/L NAA+0.1 mg/L 2,4-D+2 mg/L 6-BA,此条件下诱导率可达90%以上;最佳继代培养基为MS+0.5 mg/L NAA+0.5 mg/L 2,4-D+2 mg/L 6-BA;外源激素NAA、2,4-D和6-BA不同比例组合后对叶下珠愈伤组织诱导及继代培养影响较大。结论:首次成功建立叶下珠愈伤组织快速培养体系,为利用现代生物技术方法保护和利用叶下珠物种资源提供了一种新途径。     

叶下珠愈伤组织的诱导与培养

目的建立叶下珠愈伤组织培养方法。方法采用组织培养方法,比较不同外植体、蔗糖、植物生长物质及其配比对叶下珠愈伤组织诱导的影响。结果茎段的诱导率最高,为55.56%,叶片诱导不出愈伤组织。6-BA是叶下珠愈伤组织形成的主要影响因素,2,4-D、NAA、蔗糖次之。结论叶下珠愈伤组织诱导及继代的适宜培养基为MS 2,4-D0.5mg/L 6-BA1.0mg/L NAA0.1mg/L 蔗糖10g/L。     

长春花愈伤组织诱导及培养条件优化

目的：通过愈伤组织的诱导、增殖与培养条件的优化建立长春花愈伤组织培养体系。方法：以长春花的幼嫩叶片为外植体,在不同激素组合的脱分化、分化培养基上培养。考察抗氧化剂Vc对愈伤组织褐化的影响。结果：最佳诱导培养基为MS＋1.0 mg/L 6-BA＋0.5 mg/L 2,4-D;最佳继代培养基为MS＋2.0 mg/L 6-BA＋0.5 mg/LNAA＋0.5 mg/L 2,4-D,并在该条件下进一步悬浮继代培养。10 mg/L Vc可有效抑制长春花愈伤组织的褐化。结论：激素KT对该愈伤组织的诱导效应不明显,NAA、2,4-D和6-BA均有一定的诱导效应;Vc具有抑制长春花愈伤组织褐化的作用。     

不同激素组合对唐古特大黄愈伤组织的影响

目的通过研究不同激素对唐古特大黄愈伤组织的影响,探讨培养唐古特大黄愈伤组织最佳培养基。方法选用唐古特大黄种子萌发的无菌苗为材料,诱导愈伤组织,研究2,4-二氯苯氧乙酸(2,4-D),6-苄基氨基乙酸(6-BA),萘乙酸(NAA)3种激素组合对唐古特大黄愈伤组织诱导及愈伤组织蒽醌产量的影响。结果 2,4-D对愈伤诱导起主导性作用,2 mg/L的2,4-D最有利于愈伤组织的形成,但更高质量浓度的2,4-D会影响诱导效果。2 mg/L的6-BA有利于愈伤组织的快速诱导。对于愈伤组织中的蒽醌产量,2,4-D在2 mg/L时效果最好,6-BA无明显作用,1.0 mg/L以上质量浓度的NAA对2,4-D有增效作用。结论唐古特大黄愈伤组织的最佳培养基是MS培养基(MS)+2,4-D(2 mg/L)+6-BA(2 mg/L)+NAA(1 mg/L),在此培养基上,愈伤组织的生长速率和蒽醌的产量都有较佳的表现。     

外源激素配比对药用植物锁阳愈伤组织诱导的影响

目的 筛选最佳激素组合,提高锁阳组织培养效率.方法 以锁阳肉质茎维管组织作为外植体,以MS为基本培养基,基于正交实验设计研究三种外源激素配比(NAA、2,4-D和6-BA)以及蔗糖和琼脂浓度对锁阳愈伤组织诱导的影响.结果 NAA、2,4-D和6-BA三种激素对锁阳愈伤组织诱导均有显著影响,不同激素之间对出愈率的作用效应大小为2,4-D ＞NAA＞6-BA,诱导锁阳愈伤组织最佳激素配比为MS+NAA (1.0mg/L)+2,4-D (1.5mg/L)+6-BA(2.0mg/L).培养基中琼脂浓度和蔗糖浓度对锁阳愈伤组织诱导率有一定影响,蔗糖浓度以30g/L,琼脂浓度以4.5g/L时愈伤组织诱导率最高.结论 锁阳愈伤组织诱导最适培养基为MS+NAA (1.0mg/L)+2,4-D (1.5mg/L)+6-BA (2.0mg/L)+蔗糖(30g/L)+琼脂(4.5 g/L).     

菱叶红景天组织培养及植株再生

目的:探索菱叶红景天组织培养与植株再生技术并优化体外繁殖体系。方法:采用正交试验设计分别研究外植体种类、植物生长物质种类和浓度对菱叶红景天愈伤组织的诱导、丛生芽的产生以及生根诱导的影响,实验数据进行极差和方差分析。结果:影响菱叶红景天愈伤组织诱导的因素依次为外植体2,4-D6-BA,叶片产生愈伤组织最佳的培养基为MS附加2,4-D 1.5 mg.L-1和6-BA0.5 mg.L-1;影响菱叶红景天丛生芽诱导的因素依次为外植体NAA6-BA,茎段产生丛生芽最佳的培养基为MS附加6-BA1.5 mg.L-1和NAA1.0 mg.L-1;试管苗生根的最佳培养基为1/2MS附加IBA1.0 mg.L-1,生根率可达90%以上,生根试管苗移栽成活率达98%以上。结论:本试验初步建立了菱叶红景天组织培养与植株再生的基本体系。     

阳春砂愈伤组织的诱导

目的:通过阳春砂组织培养获得愈伤组织,建立阳春砂愈伤组织的诱导体系。方法:将阳春砂根状茎芽及阳春砂试管苗的茎段、根尖作为愈伤组织诱导的外植体材料,接种到以MS为基本培养基,分别添加不同浓度的6-苄基腺嘌呤(6-BA),ɑ-萘乙酸(NAA)及2,4-二氯苯氧乙酸(2,4-D)的培养基中(各培养基的p H约为5. 8),探讨不同外植体材料及不同培养基对阳春砂愈伤组织诱导的影响。结果:研究结果显示,阳春砂根状茎芽及试管苗的茎段、根尖3种外植体材料均能有效地诱导产生愈伤组织;其中阳春砂根状茎芽、试管苗茎段2种外植体材料诱导产生愈伤组织的最适培养基为MS+6-BA(1. 5 mg·L-1)+2,4-D(1. 0 mg·L-1)+NAA(0. 5 mg·L-1),最高诱导率分别为15%和60%;试管苗根尖诱导产生愈伤组织的最适培养基为MS+6-BA(2. 0 mg·L-1)+2,4-D(1. 0 mg·L-1)+NAA(1. 0 mg·L-1),最高诱导率76%,为阳春砂愈伤组织诱导的最佳外植体材料。结论:该研究初步建立了阳春砂的根状茎芽及试管苗的茎段、根尖3种外植体的愈伤组织诱导体系,试管苗根尖为愈伤组织诱导的最佳外植体。     

Investigation of plant extracts in traditional medicine of the Brazilian Cerrado against protozoans and yeasts

Aim of the study

To investigate the activities of the 217 plant extracts in traditional medicine of the Brazilian Cerrado against protozoans and yeasts.

Materials and methods

Plant extracts were prepared by the method of maceration using solvents of different polarities. The growth inhibition of chloroquine-resistant Plasmodium falciparum strain (FcB1) was determined by measuring the radioactivity of the tritiated hypoxanthine incorporated. Activity against Leishmania (Leishmania) chagasi and Trypanosoma cruzi was measured by the MTT colorimetric assay. The antifungal tests were carried out by using the CLSI method. The active extracts were tested also by cytotoxicity assay using NIH-3T3 cells of mammalian fibroblasts.

Results

Two hundred and seventeen extracts of plants were tested against Plasmodium falciparum. The eleven active extracts, belonging to eight plant species were evaluated against L. (L.) chagasi, Trypanosoma cruzi, yeasts and in NIH-3T3 cells. The results found in these biological models are consistent with the ethnopharmacological data of these plants. The ethyl acetate extract of Diospyros hispida root showed IC₅₀ values of 1 μg/mL against Plasmodium falciparum. This extract demonstrated no toxicity against mammalian cells, resulting in a significant selectivity index (SI) of 435.8. The dichloromethane extract of Calophyllum brasiliense root wood was active against Cryptococcus gattii LMGO 01 with MIC of 1.95 μg/mL; and Candida albicans ATCC 10231 and Candida krusei LMGO 174, both with MIC of 7.81 μg/mL. The same extract was also active against Plasmodium falciparum and L. (L.) chagasi with IC₅₀ of 6.7 and 27.6 μg/mL respectively. The ethyl acetate extract of Spiranthera odoratissima leaves was active against Cryptococcus gattii LMGO 01 with MIC of 31.25 μg/mL, and against Plasmodium falciparum with IC₅₀ of 9.2 μg/mL and Trypanosoma cruzi with IC₅₀ of 56.3 μg/mL.

Conclusion

The active extracts for protozoans and human pathogenic yeasts are considered promising to continue the search for the identification and development of leading compounds.     

Effect of feeding Mucuna pruriens on helminth parasite infestation in lambs

Ethnopharmacological relevance

Mucuna pruriens is a tropical legume anecdotally reputed to have anthelmintic properties. This study was conducted to examine the validity of such claims.

Aim of the study

The aim of this study was to determine if ingestion of Mucuna seeds reduces helminth parasite infestation in lambs.

Materials and methods

Thirty-six Dorper × Katahdin ram lambs were assigned to three treatments, a cottonseed meal based control diet, a diet in which Mucuna replaced cottonseed meal and the control diet with levamisole (7.5 mg/kg body weight) administration. All diets were isonitrogenous and isocaloric. The 12 lambs in each treatment were assigned randomly to 4 pens, each containing 3 lambs. Lambs were trickle infected three times per week by gavage with infectious Haemonchus contortus larvae (2000 larvae/lamb) for 3 weeks.

Results

Levamisole treatment decreased fecal egg counts by 87% and abomasal worm counts by 83%. Mucuna intake did not statistically affect fecal egg counts or abomasal worm counts, though numerical (P > 0.10) reductions of 7.4% and 18.1%, respectively were evident. Anemia indicators, feed intake, and lamb growth were unaffected by treatment.

Conclusions

Levamisole reduced the Haemonchus parasite burden in lambs significantly but feeding Mucuna reduced the burden by levels unlikely to eliminate the clinical effects of parasitism.     

Screening of the topical anti-inflammatory activity of the bark of Acacia cornigera Willdenow, Byrsonima crassifolia Kunth, Sweetia panamensis Yakovlev and the leaves of Sphagneticola trilobata Hitchcock

Ethnopharmacological relevance

An investigation of topical anti-inflammatory activity was undertaken on plants used in Central America traditional medicine.

Aim of study

Four herbal drugs used in the folk medicine of Central America to treat inflammatory skin affections (Acacia cornigera bark, Byrsonima crassifolia bark, Sphagneticola trilobata leaves and Sweetia panamensis bark) were evaluated for their topical anti-inflammatory activity.

Materials and methods

Petroleum ether, chloroform and methanol extracts were obtained for herbal medicines and then extracts were tested on Croton oil-induced ear dermatitis model in mice.

Results

Almost all the extracts reduced the Croton oil-induced ear dermatitis in mice and the chloroform ones showed the highest activity, with ID₅₀ (dose giving 50% oedema inhibition) values ranging from 112 μg/cm² (Byrsonima crassifolia) to 183 μg/cm² (Sphagneticola trilobata). As reference, ID₅₀ of the non-steroidal anti-inflammatory drug indomethacin was 93 μg/cm².

Conclusions

Lipophilic extracts from these species can be regarded as potential sources of anti-inflammatory principles.     

中国石斛属植物文献计量研究

石斛是珍稀濒危中药材,目前正处于快速发展阶段。为全面了解我国石斛属植物研究的历史和发展现状,作者以1954～2010年"中国知网中国学术期刊网络出版总库"收录的石斛研究文献为依据,采用文献计量学的原理和方法,对我国石斛属植物研究文献从文献年代分布、期刊分布与被引频率、主题分布、研究对象分布、作者与研究机构分布等方面进行了统计与分析。结果表明,我国石斛研究明显分为起步(2个)、停滞、平稳发展、快速上升5个阶段;期刊分布存在离散性与集中性并存的现象,已形成核心期刊研究群,并以《中国中药杂志》、《中草药》和《陕西中医》为代表;研究主题广泛涉及临床与药理、组织培养与种苗繁育、成分分析等多个领域,已经形成比较稳定的研究机构和团队,但研究对象差异显著,以铁皮石斛、金钗石斛和霍山石斛最为集中。我国石斛属植物的研究已取得显著成果,但种植产业发展缓慢,供需矛盾突出,预计种苗繁育与人工种植、产品开发、化学与药理等方面是未来的研究热点,其文献报道仍将进一步上升。     

Experimental study on anti-inflammatory activity of a TCM recipe consisting of the supercritical fluid CO2 extract of Chrysanthemum indicum, Patchouli Oil and Zedoary Turmeric Oil in vivo

Ethnopharmacological relevance

Chrysanthemum indicum (Compositae) Linné, Pogostemon cablin (Blanco) Benth and Curcuma wenyujin (Zingiberaceae) Y. H. Chen et C. Ling are three of the extensively used herbal remedies among traditional Chinese medicines for the purpose of anti-inflammation. A traditional Chinese medicine (TCM) recipe named CPZ consisting extracts of the above three herbs, has shown noteworthy anti-influenza activity, which is closely related to its anti-inflammatory feature.

Aim of this study

To investigated the anti-inflammtory activity of CPZ in vivo for a further exploration of the recipe's anti-inflammatory properties.

Materials and methods

The anti-inflammatory property of CPZ on acute inflammation was evaluated by inflammatory models of dimethylbenzene (DMB)-induced ear vasodilatation and acetic acid-induced capillary permeability enhancement in mice, as well as the carrageenan-induced paw edema rat model, in which inflammation-related cytokine including prostaglandin E₂ (PGE₂), interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and nitric oxide (NO) in the edematous paw tissue were determined by enzyme linked immunosorbent assay (ELISA). Moreover, effect of CPZ on chronic inflammation was observed through granuloma formation in rats subjected to cotton pellet implantation.

Results

CPZ (340, 170, and 85 mg/kg for mice, p.o.) not only decreased the DMB-induced ear vasodilatation but also attenuated capillary permeability under acetic acid challenge in mice. And the significant inhibition on carrageenan-induced paw edema was observed. Further more, the ELISA results showed that CPZ (170, 85, and 42.5 mg/kg for rats, p.o.) could up-regulate the level of IL-1β in the edema paw tissue of rats significantly while down-regulate that of PGE₂, but no apparent effect on TNF-α or NO was observed in the test. Besides, CPZ had a certain degree of restraining effect on the cotton pellet-induced granuloma formation in rats and the highest dose of 170 mg/kg even showed a significant suppression on it.

Conclusion

The above results indicated that CPZ possessed a potent anti-inflammatory activity, which is indicated to be closely associated with its regulation on IL-1β and PGE₂ thereby mediating the inflammatory response acting at an appropriate level.     

Regulation effects on abnormal glucose and lipid metabolism of TZQ-F,a new kind of Traditional Chinese Medicine

Aim of the study

Based on the recipe of the traditional anti-diabetic formula TZQ, we developed TZQ-F, a new formula including 8 fractions isolated from Red Paeony root, Mulberry leaf, Lotus leaf, Danshen root and Hawthorn leaf with a good quality assurance. The study was aimed at fraction preparation and effects of the fractions on abnormal glucose and lipid metabolism.

Materials and methods

The active fractions were obtained by macroporous resin, ion-exchange resin and polyamide resin column chromatographies. HPLC analyses were used for quality control. In vitro mechanism study included DPPH radical scavenging, AGEs formation inhibition, α-glucosidase inhibition and lipase inhibition, and rats on high-fat diet were used for in vivo study.

Results

In vitro mechanism study showed that among the 8 fractions, three of them had inhibition effects on intestinal disaccharase, three with inhibition effects on lipase, and five with effects of free radical scavenging. In vivo study showed that after 4 weeks of treatment, TZQ-F significantly decreased the levels of serum total cholesterol, TG, glucose, LDL-C and HDL-C in rats on high-fat diet. Consistent with the in vitro and in vivo results, histology study demonstrated that TZQ-F alleviated hepatic steatosis induced by high-fat diet.

Conclusions

TZQ-F possesses the potential regulation effects on abnormal glucose and lipid metabolism.     

Antifungal activity of Brazilian medicinal plants involved in popular treatment of mycoses

A survey of medicinal plants used to treat common mycoses was done in the Curituba district, Sergipe State, Brazil. One hundred inhabitants were interviewed by health agents and traditional healers. Four different plants were the most cited (more than 50% of the citations): Ziziphus joazeiro, Caesalpinia pyramidalis, Bumelia sartorum and Hymenea courbaril. The aqueous extracts obtained following traditional methods and using different parts of these plants, were submitted to drop agar diffusion tests for primary antimicrobial screening. Only the water infusion extract of Ziziphus joazeiro and Caesalpinea pyramidalis presented a significant antifungal activity against Trichophyton rubrum, Candida guilliermondii, Candida albicans, Cryptococcus neoformans and Fonsecaea pedrosoi, when compared to the antifungal agent amphotericin B. The minimal inhibitory concentration (MIC) of the bioactive extracts was evaluated by the microdilution method. Best activity with a MIC of 6.5 microg/ml for both extracts was observed against Trichophyton rubrum and Candida guilliermondii. Ziziphus joazeiro and Caesalpinea pyramidalis extracts presented also low acute toxicity in murine models. The present study validates the folk use of these plant extracts and indicates that they can be effective potential candidates for the development of new strategies to treat fungal infections.     

木蝴蝶种子化学成分研究

目的:研究紫葳科Bignoniaceae植物木蝴蝶Oroxylum indicum种子的化学成分.方法:采用硅胶柱色谱、Sephadex LH-20凝胶柱色谱等手段进行分离纯化,通过化合物的理化常数和波谱数据鉴定其结构.结果:从木蝴蝶种子的95％乙醇提取物中分离并鉴定了20个化合物,分别为木蝴蝶苷A(1)、木蝴蝶苷B(2)、白杨黄素(3)、黄芩苷元(4)、槲皮素(5)、芹菜素(6)、山柰酚(7)、槲皮素-3-O-阿拉伯吡喃糖苷(8)、羽扇豆醇(9)、2α,3β-二羟基羽扇豆醇(10)、赤松素(11)、二氢赤松素(12)、胆甾-5-烯-3,7-二醇(13)、连翘环己醇(14)、异连翘环己醇(15)、zarzissine(16)、(E)-银松素-3-O-β-D-吡喃葡萄糖苷(17)、腺苷(18)、β-谷甾醇(19) 、β-胡萝卜苷(20).结论:化合物11-13,15～18为首次从木蝴蝶植物中分离得到,其中除化合物18外,其余6个化合物均为首次从紫葳科植物中获得.     

乌拉尔甘草HMGR基因cDNA的克隆与序列分析

目的:对乌拉尔甘草3.羟基-3-甲基戊二酰辅酶A还原酶(3-hydroxy-3methylglutary CoA reductase,HMGR)的cDNA克隆并进行序列分析.方法:根据NCBI数据库中的豆科其他物种HMGR的cDNA保守区设计引物,利用同源扩增和cDNA末端快速扩增技术从甘草根中获得目的基因;利用BLAST进行序列比对,ORF Finder寻找开发阅读框,Prosite分析蛋白质的基本结构域,Clustal x比对已有HMGR的氨基酸序列,并构建进化树.结果:得到1个全长为1 842 bp的HMGR的cDNA序列,含有1 722 bp的开放阅读框(open reading frame,ORF),编码573个氨基酸,具有HMGR家族的特异序列,推测的氨基酸序列与豌豆、蒺藜苜蓿的氨基酸序列一致性分别为84%,76%.结论:对甘草HMGR基因的cDNA进行了克隆,为进一步研究3-羟基-3-甲基戊二酰辅酶A在甘草酸生物合成途径中的作用提供了理论依据.     

常用藏药“蒂达”(藏茵陈)基原物种药用合理性及资源利用价值评价

目的:对“蒂达”各品种不同基原植物药用合理性及其资源利用价值作出评价.方法:采用HPLC指纹图谱共有特征峰、结合SPSS聚类分析方法,评价“蒂达”不同品种基原植物的成分组成相似性.结果:“蒂达”不同品种涉及的来源有龙胆科獐牙菜属、花锚属、扁蕾属及肋柱花属共15种1变种33个样品,指纹图谱全谱相似度较差;以10个共有峰成分的相对面积聚类,其基原植物可分别聚为4个组;上述4个属的属间成分组成差异较大;其中獐牙菜属不同种间成分组成变化较大,而其他各属种间成分组成相似度较高.结论:上述龙胆科4属植物均含有具有保肝利胆生物活性的环烯醚萜类、(山)酮类及三萜类成分,藏医学将其归为“蒂达”一类药材使用具有一定的物质基础;鉴于“蒂达”类药材不同基原各品种间在成分组成上差异较大,分别制定各品种的HPLC指纹图谱,是鉴别和控制各品种质量的有效手段,可有效控制各基原品种质量.