Antipyretic Effects of Liposoluble Fractions of Viola yedoensis

Objective To clarify the antipyretic effect of the Chinese materia medica, Violae Herba(Viola yedoensis), and its active fractions by examining the effects of V. yedoensis extracts with differing polarities on body temperature, total white blood cell(WBC) count, WBC differential count, and total serum complement of rabbits with lipopolysaccharide(LPS)-induced fever. Methods The rabbits were treated with water and ethanolic extracts of V. yedoensis, as well as petroleum ether, ethyl acetate, and n-butanol fractions of the ethanolic extract at low-, mid- and high- doses. The LPS was injected via the ear vein of rabbits in model and treatment groups 30 min post-gavage. Their body temperature was measured at 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, and 6.0 h after the LPS challenge to calculate the temperature changes and thermal response index. After the last temperature measurement, blood samples were collected to determine the blood cell counts and total serum complement(CH50) level. Results Compared with the model group, body temperature was significantly lower in the low-dose ethanolic extract group, low- and mid-dose petroleum ether fraction groups, and all three ethyl acetate fraction groups. Serum CH50 levels were lower in all treatment groups, except the ethanolic extract groups, than that in the model group, with no significant difference. V. yedoensis had no significant effect on the blood cells of febrile rabbits challenged with LPS for 6 h. Conclusion The antipyretic effects of V. yedoensis are strong, and its active fractions are the petroleum ether and ethyl acetate fractions of ethanolic extract.     

三九胃泰方抗胃溃疡有效部位的研究

目的: 对三九胃泰方抗胃溃疡的有效部位进行筛选。方法: 将SD大鼠分为正常对照组、模型组、阳性对照(西米替丁(0.1 g·kg^-1)与三九胃泰颗粒剂(2 g·kg^-1)组、石油醚萃取物组、醋酸乙酯萃取物组、正丁醇萃取组及水萃取组,按生药剂量均为2 g·kg^-1ig给药7 d,采用乙醇造大鼠胃黏膜损伤模型,以胃溃疡抑制率、胃蛋白酶活力、血清中丙二醛(MDA)含量与超氧化物歧化酶(SOD)活力为检测指标,对不同极性溶剂(石油醚、醋酸乙酯、正丁醇与水)萃取部位的抗胃溃疡活性进行评价。结果: 三九胃泰方各极性萃取部位均能显著抑制乙醇致大鼠胃黏膜损伤(P<0.05),其中石油醚萃取部位胃溃疡抑制率最高(89.15%),高于西米替丁组(59.90%)及三九胃泰颗粒剂组(55.31%)。三九胃泰方各极性萃取部位均可显著降低大鼠胃蛋白酶活力,同时增强血清中SOD的活力(P<0.05)。结论: 三九胃泰方不同极性萃取部位均具有显著的抗胃溃疡作用,其中石油醚萃取部位活性最强。     

Behavioural effects of crude and semi-purified extracts of Syzygium cuminii linn. skeels

In this study, different extracts, fractions and subfractions from the seeds of Syzygium cuminii Linn. Skeels, have been evaluated for behavioural effects in mice, particularly in relation to their sedative and anticonvulsant actions. Oral treatment with the hydroalcoholic extract showed an anticonvulsant activity in pentylenetetrazol- and maximal electroshock-induced convulsions, besides a hypothermic effect. The infusion, the aqueous and ethyl acetate fractions of the hydroalcoholic extract, as well as the subfractions of the latter subfraction, promoted a decrease in spontaneous activity of mice after i.p. but not after p.o. treatment. The ethyl acetate fraction and its subfractions enhanced latency and duration of the first convulsion induced by pentylenetetrazol. One of the subfractions of the ethyl acetate fraction, a mixture of about five polyphenolic compounds, whose main constituent is gallic acid, also presented a depressant profile without an anticonvulsant activity. Our results suggest that S. cuminii has some active principles with central depressant properties, and some of them also present an anticonvulsant action, although the polyphenolic compounds do not seem be the main constitutents responsible for this effect. Copyright © 1998 John Wiley & Sons, Ltd.     

金银花中一个罕见的二聚体环烯醚萜苷

 目的研究金银花中的环烯醚萜苷类成分。方法金银花经体积分数为70%乙醇提取,依次用石油醚、乙酸乙酯、正丁醇萃取,乙酸乙酯部位采用硅胶及ODS柱色谱进行分离纯化,通过波谱分析鉴定化合物结构。结果分得一个通过碳碳双键连接而成的、结构罕见的二聚体环烯醚萜苷centauroside(Ⅰ)。结论该化合物为首次从忍冬属植物中分离得到。     

Hypolipidemic activity of seeds of Cassia tora Linn

Ethanolic extract of seeds of Cassia tora L. and its fractions were investigated for hypolipidemic activity on triton induced hyperlipidemic profile. Ethanolic extract and its ether soluble and water soluble fraction decreased serum level of total cholesterol by 42.07, 40.77 and 71.25%, respectively. On the other hand ethanolic extract, ether soluble fraction and water soluble fraction increased the serum HDL-cholesterol level by 6.72, 17.20 and 19.18%, respectively. Ethanolic extract, ether fraction and water fraction decreased triglyceride level by 26.84, 35.74 and 38.46%, respectively. The reduction in LDL-cholesterol level by ethanolic extract, ether soluble fraction and water soluble fraction were 69.25, 72.06 and 76.12%, respectively.     

Anti-inflammatory and anti-nociceptive activities of ethanolic extract and its various fractions from Adiantum capillus veneris Linn

Aim of the study

To investigate the anti-inflammatory and anti-nociceptive activities of the crude ethanolic extract of Adiantum capillus veneris Linn. (Adiantaceae) and its various fractions.

Materials and methods

The ethanolic extract and its fractions were given at a dose of 200 mg/kg po and 300 mg/kg po for testing their anti-inflammatory activity by carrageenan induced hind paw edema. The analgesic activity of the ethanolic extract and its fractions has been carried out by tail-flick method and writhing test at a dosage of 300 mg/kg po. Gastric ulceration studies have been further carried out to study the antiulcer effect of the ethanolic extract and its various fractions at dose of 900 mg/kg body weight.

Results

Amongst the tested fractions, the ethyl acetate fraction exhibited better inhibition (67.27%) at 300 mg/kg po dosage when compared to the standard drug Indomethacin (63.63%) after 3 h in the carrageenan induced hind paw edema. The anti-inflammatory activity of the ethanolic extract and its various fractions appear to be related to the inhibition of NO release, and the decreasing TNF-α level. The ethanolic extract and all its fractions especially the ethyl acetate (p < 0.01) showed significant analgesic activity with insignificant ulceration as compared to the standard drug, i.e. ibuprofen. The histopathological study of ethanolic extract and its fractions reveals that none of them cause ulcer.

Conclusion

The present study indicates that Adiantum capillus veneris Linn. has significant anti-inflammatory and analgesic effect.     

Antibacterial and anti-inflammatory activities of extract and fractions from Pyrrosia petiolosa (Christ et Bar.) Ching

Ethnopharmacological relevance

Pyrrosia petiolosa is commonly used as a traditional Chinese medicine for treatment of acute pyelonephritis, chronic bronchitis and bronchial asthma. This study aims to evaluate the antibacterial activity of the ethanol extract and its derived fractions of Pyrrosia petiolosa obtained with solvents of different polarities and to perform the anti-inflammatory screening.

Materials and methods

The powdered aerial parts of Pyrrosia petiolosa were used to extract various fractions with ethanol, petroleum ether, ethyl acetate, N-butanol and aqueous. Qualitative phytochemical screening was performed on the ethanol extract, petroleum ether fraction, ethyl acetate fraction, N-butanol fraction and aqueous fraction. The agar diffusion method, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were employed to evaluate antibacterial activity of the ethanol extract and fractions. The in vitro cytotoxicity of ethanol extract and fractions was determined using MTT assay. The anti-inflammatory activity was analyzed using the mouse ear swelling induced by xylene.

Results

The phytochemical screening revealed the presence of anthraquinones, flavonoids, terpenoids, steroids, saponins, phenols and reducing sugars in the extract and fractions. Antibacterial results showed that petroleum ether fraction and N-butanol fraction inhibited all the tested microorganisms with the maximum inhibition zone of 15.25±0.35 mm. Ethyl acetate fraction also exhibited good antibacterial activity except Pseudomonas aeruginosa ATCC 27853, while extract and aqueous fraction inhibited 8 out of 13 (61.5%) of the tested microorganisms. The MIC values of ethanol extract and fractions ranged from 1.25 to 10.00 mg/mL and most of the MBC values were equal or twice as high as the corresponding MIC values. The in vitro cytotoxicity showed the ethanol extract and fractions exhibited non-toxic or low toxic activity against lung cancer cell lines A549 and mouse spleen cells. In anti-inflammatory experiment, ethanol extract at 5.0 and 10.0 mg/kg exhibited significant anti-inflammatory activity against the mouse ear swelling induced by xylene and the maximum inhibition rate reached as high as 67%.

Conclusions

Pyrrosia petiolosa could be a potential candidate for future development of a novel antibacterial and anti-inflammatory agent.     

Antimicrobial activity of Micromeria nervosa from the Palestinian area

Organic and aqueous solvent extracts and fractions of Micromeria nervosa (Desf.) Benth. (Labiatae) were investigated for antimicrobial activities on several microorganisms including bacteria and yeast. The different extracts differed significantly in their antimicrobial activities with the ethanolic extract being most active, followed by ethyl acetate and petroleum ether extracts. The least active extract was the aqueous. No significant difference between the different test microorganisms in their susceptibility to different extracts, with Candida albicans being the most susceptible to ethanolic extract giving 1.5 times the effect of nystatin. One of the main active ingredients of M. nervosa was isolated and identified as carvacrol. No significant difference in antimicrobial activity was found between carvacrol and its isomer thymol. The most susceptible test microorganism was Proteus vulgaris to carvacrol, and P. vulgaris and C. albicans to thymol. The least susceptible bacterium to both fractions was Pseudomonas aeruginosa. Minimum inhibitory concentration (MIC) and minimum bactericidal or fungicidal concentrations (MBC or MFC) were determined for both compounds.     

檀香不同萃取物对豚鼠离体肠平滑肌收缩的影响

目的:观察檀香不同萃取物对豚鼠离体回肠平滑肌收缩的影响,探讨其作用机制.方法:利用BL-420F生物机能实验系统,在HW-400S恒温平滑肌浴槽中,37℃下观察檀香不同萃取物对豚鼠离体回肠运动功能的影响.结果:檀香水提液乙醚萃取物、檀香水提液乙酸乙酯萃取物、檀香醇提液乙醚萃取物、檀香醇提液乙酸乙酯萃取物对豚鼠离体肠自主运动有抑制作用(P＜0.01),表现为振幅减低;檀香水提液乙醚萃取物、檀香水提液乙酸乙酯萃取物、檀香醇提液石油醚萃取物、檀香醇提液乙醚萃取物、檀香醇提液乙酸乙酯萃取物对乙酰胆碱( Ach)造成的豚鼠离体肠痉挛状态有拮抗作用(P＜0.01),表现为振幅减低;檀香水提液乙酸乙酯萃取物对阿托品造成的松弛状态有明显的协同作用(P＜0.01),表现为振幅减低.结论:檀香不同萃取物对豚鼠离体肠平滑肌有抑制作用.     

Protective effect of fruits of Morinda citrifolia L. on scopolamine induced memory impairment in mice: a behavioral, biochemical and cerebral blood flow study

Ethnopharmacological relsevance

Noni (Morinda citrifolia L.) is widely used for different illnesses including CNS disorders. Recently Noni has been reported to prevent amyloid beta induced memory impairment in mice. However, the influence of Noni on cholinergic system has not been explored so far. Therefore, present study was designed to investigate effect of Noni fruit on memory, cerebral blood flow (CBF), oxidative stress and acetylcholinesterase (AChE) activity in scopolamine induced amnesia model.

Materials and methods

Mice were orally treated with ethanolic extract of Noni fruit and chloroform, ethyl acetate and butanol fractions of ethanolic extract for three days. Scopolamine was administered 5 min prior to acquisition trial and memory function was evaluated by passive avoidance test. CBF was measured by laser doppler flowmetry. AChE activity and oxidative stress parameters were estimated in mice brain at the end of behavioral studies. Further, effect of ethanolic extract and its fractions (5-400 μg/ml) on AChE activity was measured in vitro.

Results

Scopolamine caused memory impairment along with reduced CBF, increased AChE activity and oxidative stress in mice brain. Ethanolic extract of Noni fruits and its chloroform and ethyl acetate fractions significantly improved memory and CBF. However, butanol fraction had no effect. Further, increased oxidative stress and AChE activity following scopolamine was significantly attenuated by ethanolic extract of Noni and its fractions. Moreover ethanolic extract and its fractions showed dose dependent inhibition of AChE activity in vitro.

Conclusion

These observations suggest that Noni may be useful in memory impairment due to its effect on CBF, AChE and oxidative stress.     

蘘荷提取物抗氧化能力及抑菌作用

目的:以新鲜蘘荷Zingiber mioga花蕾为原料,探讨蘘荷花蕾不同提取部位的抗氧化作用,并筛选其有效抑菌部位。方法:蘘荷花蕾用甲醇提取浓缩,依次萃取得到石油醚、二氯甲烷、乙酸乙酯、正丁醇和水等5个萃取部位后,采用1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除模型评价不同萃取部位抗氧化能力,用打孔扩散法考察萃取部位对大肠埃希菌、沙门氏菌、金黄色葡萄球菌和铜绿假单胞菌的体外抑菌活性。结果:加热回流法提取蘘荷花蕾,提取率为3.1%,其中乙酸乙酯部位DPPH自由基清除能力最高,半数抑制率(IC50)达到(26.22±1.12)mg·L-1,对铜绿假单胞菌的抑菌圈达到(10±1)mm,石油醚部位抑菌活性最高,对金黄色葡萄球菌的最低抑菌浓度(MIC)最低,达到25.0 mg·L-1。结论:蘘荷花蕾各部位均有一定的抗氧化能力,综合抑菌效果比较石油醚部位二氯甲烷部位乙酸乙酯部位甲醇提取物,为蘘荷花蕾抗氧化产品、抑菌剂的开发利用提供理论基础。     

The pharmacological screening of Pentanisia prunelloides and the isolation of the antibacterial compound palmitic acid.

The uses of Pentanisia prunelloides in Zulu traditional medicine indicate that the plant is believed to be effective in relieving inflammation, bacterial and viral infections and also stimulating uterine contraction. Aqueous, ethanolic and ethyl acetate extracts of leaves and roots were screened for prostaglandin-synthesis inhibitors and antibacterial and antiviral activity. In the results of the anti-inflammatory assay all the extracts showed cyclooxygenase-1 inhibition. The ethanolic and ethyl acetate extracts showed greater antibacterial activity than the aqueous extracts against Gram-positive (Bacillus subtilis, Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli, Klebsiella pneumoniae). Both root and leaf extracts were found to inhibit viral replication of the Influenza A virus. The ethyl acetate extract was fractionated by silica vacuum liquid chromatography and anti-inflammatory activity was found to be most pronounced in the more polar fractions. The presence of antibacterial activity was confirmed by running the fractions on a thin layer chromatography (TLC) plate and performing a bioautographic assay. The active fraction was further purified by TLC and the major antibacterial compound in the ethyl acetate root extract was identified by GC/MS as palmitic acid.     

山东产忍冬不同药用部位挥发油成分分析及抗氧化活性

目的:对山东产忍冬花、茎、叶不同药用部位进行挥发性成分分析及抗氧化活性研究。方法:分别提取忍冬花、茎、叶的挥发油,利用GC-MS进行成分分析和比较;用70%乙醇分别提取忍冬花、茎、叶,提取液回收溶剂后分别用石油醚、乙酸乙酯、正丁醇萃取,利用DPPH比色法对各萃取物、萃取后的水相部位及挥发油分别进行体外抗氧化能力比较。结果:从忍冬花、茎、叶中共分离鉴定了49种成分,三者共有成分11种,分别占各自挥发油含量的60.66%,77.98%和80.38%,含量最高的均为棕榈酸。忍冬花、茎、叶的不同提取物对DPPH自由基均有较好的清除作用,且清除能力随着浓度的增加而增加,但各样品间存在一定差异。乙酸乙酯萃取物清除能力最强,依次是正丁醇萃取物、水相、挥发油、石油醚萃取物;花的清除能力最强,茎和叶次之。结论:忍冬花、茎、叶中挥发油成分具有较高相似性;三者挥发油及不同极性提取物均具有较好的抗氧化能力。     

Anticonvulsive activity of Albizzia lebbeck, Hibiscus rosa sinesis and Butea monosperma in experimental animals

The ethanolic extracts of leaves of Albizzia lebbeck and flowers of Hibiscus rosa sinesis and the petroleum ether extract of flowers of Butea monosperma exhibited anticonvulsant activity. The bioassay guided fractionation indicated that the anticonvulsant activity lies in the methanolic fraction of chloroform soluble part of ethanolic extract of the leaves of A. lebbeck, acetone soluble part of ethanolic extract of H. rosa sinesis flowers and acetone soluble part of petroleum ether extract of B. monosperma flowers. The fractions protected animals from maximum electro shock, electrical kindling and pentylenetetrazole-induced convulsions in mice. The fractions also inhibited convulsions induced by lithium-pilocarpine and electrical kindling. However, they failed to protect animals from strychnine-induced convulsions. The fractions antagonised the behavioral effects of D-amphetamine and potentiated the pentobarbitone-induced sleep. The fractions raised brain contents of gamma-aminobutyric acid (GABA) and serotonin. These fractions were found to be anxiogenic and general depressant of central nervous system.     

藏药短穗兔耳草有效部位的抑菌活性研究

目的对短穗兔耳草Lagotis brachystachyM axim挥发油及全草分萃取段进行了抑菌活性研究。方法选择金黄色葡萄球菌、枯草芽孢杆菌、伤寒沙门氏菌、大肠埃希菌和铜绿假单胞菌为代表菌种,筛选出了对所选细菌的生长具有明显抑制作用的抗菌活性部分。结果短穗兔耳草挥发油、石油醚萃取部分、醋酸乙酯萃取部分、正丁醇萃取部分都具有部分活性。结论短穗兔耳草挥发油对金黄色葡萄球菌和枯草芽孢杆菌有抑菌活性,石油醚萃取部分对5种细菌都不敏感,醋酸乙酯萃取部分对金黄色葡萄球菌、枯草芽孢杆菌和大肠埃希菌有抑菌活性,正丁醇萃取部分对金黄色葡萄球菌、枯草芽孢杆菌、伤寒沙门氏菌和铜绿假单胞菌有抑菌活性。     

Pharmacological basis for use of Lychnophora trichocarpha in gouty arthritis: anti-hyperuricemic and anti-inflammatory effects of its extract, fraction and constituents

Ethnopharmacological relevance

The ethanolic extract of Lychnophora trichocarpha Spreng. is used in Brazilian folk medicine to treat bruise, pain and inflammatory diseases.

Aim of the study

The present study aimed at investigating whether ethanolic extract of L. trichocarpha, its ethyl acetate fraction and its main bioactive compounds could be useful to treat gouty arthritis by countering hyperuricemia and inflammation.

Materials and methods

L. trichocarpha ethanolic extract (LTE), ethyl acetate fraction from ethanolic extract (LTA) and isolated compounds were evaluated for urate-lowering activity and liver xanthine oxidase (XOD) inhibition in oxonate-induced hyperuricemic mice. Anti-inflammatory activity in monosodium urate crystal-induced paw oedema, an experimental model of gouty arthritis, was also investigated.

Results

Crude ethanolic extract and its ethyl acetate fraction showed significant urate-lowering effects. LTE was also able to significantly inhibit liver xantine oxidase (XOD) activity in vivo at the dose of 250 mg/kg. Luteolin, apigenin, lupeol, lychnopholide and eremantholide C showed the anti-hyperuricemic activities among tested compounds. Apigenin also showed XOD inhibitory activity in vivo. Luteolin, lychnopholide, lupeol and eremantholide C, in turn, did not shown significant inhibitory activity towards this enzyme, indicating that this mechanism is not likely to be involved in urate-lowering effects of those compounds. LTE, LTA, lupeol, β-sitosterol, lychnopholide, eremantholide, luteolin and apigenin were also found to inhibit monosodium urate crystals-induced paw oedema in mice.

Conclusions

Ethanolic extract of Lychnophora trichocarpha and some of its bioactive compounds may be promising agents for the treatment of gouty arthritis since they possesses both anti-hiperuricemic and anti-inflammatory properties.     

不同果形栀子鲜品不同极性部位HPLC指纹图谱

目的:研究并比较不同果形栀子鲜品不同极性部位(石油醚部位、三氯甲烷部位、乙酸乙酯部位、正丁醇部位、水部位)指纹图谱,深入了解其化学成分含量差异及分布情况。方法:将栀子用水回流提取,得水提取物,取水提物0. 1 g,用水50 m L溶解后,依次用石油醚、三氯甲烷、乙酸乙酯、正丁醇进行萃取,得到各萃取相及萃取后的水相,浓缩至浸膏。建立HPLC指纹图谱,并采用相似度评价系统软件进行数据分析。结果:不同产地栀子水提物三氯甲烷部位指纹图谱可以将福建、河南、江西产栀子分开。福建栀子水提物与河南、江西的区别主要体现在石油醚部位,且其脂溶性成分比河南、江西栀子多;河南栀子水提物与福建、江西栀子的区别主要体现在乙酸乙酯部位,且其环烯迷萜苷类成分含量明显高于福建、江西栀子。江西栀子水提物与河南、福建栀子的差异主要体现在正丁醇部位,其无有机酸类峰C1。六、七棱栀子:栀子水提物的三氯甲烷部位指纹图谱可以将福建与河南的六、七棱栀子区分开,且七棱栀子各成分含量均大于六棱;栀子水提物的石油醚和乙酸乙酯部位指纹图谱均可以将江西六、七棱栀子区分开。河南六棱栀子Z3峰明显高于七棱;江西七棱栀子水提物三氯甲烷、乙酸乙酯部位各成分含量大于六棱。结论:福建、河南、江西栀子化学成分含量及种类存在显著差异;六、七棱栀子图谱差异主要体现在峰高。     

茜草炭不同极性部位化学成分组成及保护氧化损伤活性比较

采用氧化低密度脂蛋白(ox-LDL)诱导的人脐静脉内皮细胞(HUVECs)损伤模型,MTT比色法测定细胞活力,评价茜草炭不同极性部位提取物的抗氧化损伤活性,同时采用超高效液相色谱与串联四级杆飞行时间质谱联用技术(UPLC-QTOF-MS)对各极性部位化学成分进行定性研究。结果显示,乙酸乙酯部位与正丁醇部位均可显著提高细胞活力(P0.01),石油醚部位对细胞活力影响不大,水提取部位对损伤的HUVECs有一定的抑制作用。UPLC-Q-TOF-MS分析结果显示,从茜草炭4个极性部位提取物中共鉴定化合物32种,包括31种醌类及其糖苷类和1个烯萜(茜草哌唑嗪C),石油醚部位、乙酸乙酯部位、正丁醇部位、水提取部位分别鉴定出化合物23,32,26,15种。关联体外细胞实验结果表明,乙酸乙酯部位和正丁醇部位为茜草炭抑制ox-LDL诱导HUVECs损伤的有效部位,为阐明茜草炭的药效物质基础提供科学依据,为茜草炭功效-物质相关性研究奠定基础。     

甘草中-葡α萄糖苷酶抑制剂的初步研究

目的：从甘草中提取分离α-葡萄糖苷酶抑制剂。方法：将甘草水提取物依次用石油醚、乙酸乙酯、正丁醇萃取，然后测定各部分的酶抑制活性，对活性最强的部分进行酶抑制动力学研究。结果：石油醚部分、乙酸乙酯部分、正丁醇部分与剩余水提物部分的酶活性抑制率分别为68．93％、83．02％、32．17％和10．79％，与综合水提取物的酶活性抑制率69．77％相比，乙酸乙酯部分的活性最强，而且乙酸乙酯部分表现为一种快速的剂量依赖性的竞争性抑制类型，其Ki=34μg／ml。结论：乙酸乙酯部分存在较强的α-葡萄糖苷酶抑制活性成分，对其作进一步分离可望得到α-葡萄糖苷酶抑制单体成分。     

五倍子有效部位抗病原微生物活性

目的:探讨五倍子抗细菌和抗白假丝酵母真菌的有效活性部位。方法:采用琼脂平板二倍稀释法测定了五倍子醇提物的石油醚、三氯甲烷、乙酸乙酯、正丁醇、乙醇和水6个有效部位对金黄色葡萄球菌、链球菌、大肠埃希菌等5个种属细菌和白假丝酵母真菌的最低抑菌浓度(MIC)。用单因素方差分析法、独立样本t检验比较分析不同活性部位对受试菌株抑菌活性的强弱。结果:五倍子石油醚、三氯甲烷和乙醇有效部位均无抗细菌和真菌活性,水部位仅对金黄色葡萄球菌有一定抗菌活性,MIC为733.69 g·L-1,正丁醇部位仅对5种细菌有较强的抗菌活性,MIC为2.06~32.96 g·L-1,而乙酸乙酯部位对受试细菌和白假丝酵母真菌均有强的抗菌活性,MIC分别为2.88~23.07 g·L-1和0.36~27.28 g·L-1。统计分析表明,乙酸乙酯和正丁醇部位对革兰阳性菌的抑菌活性强于对革兰阴性菌的抑菌活性(P<0.01,P<0.05),两者对同种属细菌的抑菌活性强弱相当,对耐药株和敏感株具有相似的抗菌活性。虽五倍子乙酸乙酯部位对白假丝酵母真菌临床分离株的MIC(95.15±96.34)mg·L-1明显高于克霉唑(8.00±8.92)mg·L-1(P<0.01),但克霉唑对临床分离株的耐药率为14.29%(2/14),而乙酸乙酯部位对所有临床分离株均有相似的抗菌活性(MIC为0.36~0.72 g·L-1)。结论:五倍子抗细菌和真菌的活性部位为乙酸乙酯部位。