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1.
目的:探讨微生物对青蒿素(I)的转化作用。方法:通过华根霉和雅致小克银汉霉在土豆培养基中发酵产酶,对青蒿素进行转化。结果:两株菌对底物均有转化作用,分离出去氧青蒿素deoxyartemisinin(Ⅱ),3α羟基去氧青蒿素3α-hydroxydeoxyartemisinin(Ⅲ)和9β-羟基青蒿素9β-hydroxyartemisinin(Ⅳ)共3个产物,其中Ⅳ为一新化合物,同时振荡条件下底物在无菌培养基中也能发生微量转化得到产物Ⅱ。结论:青蒿素易被实验两株真菌转化,同时过氧桥也易断裂而失去一个氧原子成为去氧青蒿素,丧失抗疟活性,起作用的可能是土豆培养基中的铁元素。  相似文献   

2.
肾上腺素能β1受体亚型特异性抗体的制备及鉴定   总被引:2,自引:0,他引:2  
[目的]制备和鉴定β1受体亚型特异性抗体。[方法]人工合成β1受体细胞膜外第二环197-222位氨基酸序列作为抗原。连接钥孔冒贝血蓝蛋白(KLH)增加抗原性后免疫兔获得抗血清,通过凝胶又扩散实验和ELISA法鉴定其效价;通过免疫荧光法及ELISA法鉴定其特异性;通过离体蛙心灌流实验鉴定其药理活性。[结果]该抗血清效价高(分别为1:64和1:10^6)、特异性强,能和心肌β1受体发生特异性结合(1:10^4-1:10^5),为异丙肾上腺素的非竞争性拮抗剂。(pD2′-1.62)。[结论]成功制备的β1受体亚型特异性抗体可能成为进一步研究β1受体分布,功能和定量的有力工具。  相似文献   

3.
目的:为了进一步揭示中药苍白秤钩风Diploclisia glaucescens 药理活性的物质基础,研究并开发其活性成分,对采自广西的苍白秤钩风藤茎的化学成分进行了系统研究。方法:经硅胶、反相硅胶和Sephadex LH-20反复柱层析分离纯化并通过波谱分析鉴定了9个化合物的结构。结果:9个化合物分别被鉴定为:(2,3)反式-N-对羟基苯乙基阿魏酰胺(1),1,5-二羟基-3-甲基-蒽酮(Ⅱ),商陆酸3-O-β-D葡萄糖醛酸-28-O-β-D葡萄糖苷(Ⅲ),商陆酸3--O-β-D葡萄糖-28-O-β-D葡萄糖苷(Ⅳ),商陆酸3--O-β-D葡萄糖醛酸苷(Ⅴ),商陆酸-3-O-β-D葡萄糖苷(Ⅵ),豆甾醇(Ⅶ),豆甾醇-3-O-β-D葡萄糖苷(Ⅷ),3-甲氧基-4-羟基-苯甲酸(Ⅸ)。结论:化合物Ⅰ,Ⅱ为首次从本属植物中分离得到,通过仔细解析Ⅱ的二维相关谱(^1H-^1HCOSY,HMQC,HMBC),对化合物Ⅱ的碳谱数据进行了重新归属。药理实验表明化合物Ⅰ具有较好的免疫增强活性,化合物Ⅳ-Ⅵ有了具有一定的免疫增强活性。  相似文献   

4.
目的:对抗疟药物青蒿素(Ⅰ)进行了生物转化研究。方法:利用长春花及银杏植物细胞悬浮培养细胞进行生物转化。用硅胶柱色谱进行产物的分离,波谱方法鉴定产物的结构。结果:此两种植物悬浮细胞体系均能将青蒿素转化成3α-羟基去氧青蒿素(Ⅱ)。结论:此两种植物悬浮细胞体系均有有效转化青蒿素。  相似文献   

5.
目的研究流苏龙胆Gentiana panthaica中的仙酮类成分。方法采用多次的硅胶柱色谱法分离纯化,并通过理化性质和光谱与波谱分析技术鉴定其化学结构。结果从流苏龙胆中分离得到6个[口山]酮类化合物,分别鉴定为:1-羟基-2,3,4,7-四甲氧基[口山]酮(Ⅰ)、1,8-二羟基-3,5-二甲氧基[口山]酮(Ⅱ)、1-羟基-2,3,4,5-四甲氧基[口山]酮(Ⅲ)、1-羟基-2,3,7-三甲氧基[口山]酮(Ⅳ)、1-羟基-2,3,5-三甲氧基[口山]酮(Ⅴ)和1,7-二羟基-2,3,5-三甲氧基[口山]酮(Ⅵ)。结论6个化合物均为首次从该植物中分离得到。  相似文献   

6.
目的:分析乌拉尔甘草Glycyrrhiza uralensis的化学成分。方法:采用正、反相硅胶柱层析分离,应用液谱方法进行结构鉴定。结果:从甘草中共分离出3个三萜皂苷、2个香豆素和8个黄酮类化合物,其中一个三萜皂苷为新化合物。结论:通过ESI-MS,^1HNMR,^13CNMR,HMQC和HMBC分析,将新三萜皂苷的结构鉴定为3-O-[β-D-葡萄糖醛酸甲酯-(1→2)-β-D-葡萄糖醛酸]-24-羟基-甘草内酯。  相似文献   

7.
大黄酸-雌激素偶联物的合成及其药理学活性   总被引:5,自引:0,他引:5  
目的:设计并合成大黄酸-雌激素偶联物,以期在保留雌激素对骨的作用的同时降低其对子宫内膜增殖的刺激。方法:经雌酚酮或雌二醇3-位酚羟基以烷基哌嗪或聚乙二醇哌嗪为桥合成与大黄酸相连的衍生物,通过MS,^1H NMR,IR确定结构,并研究目标化合物对小鼠子宫内膜增殖的影响、对体外培养小鼠胚胎长骨生长的影响。结果:合成的10个目标化合物中,部分目标物能促进体外培养小鼠胚胎长骨的生长,桥链为乙基或丙基时,化合物的活性较雌酚酮相比减弱,当桥链为三聚乙二醇时,对骨的促生长活性增强。所测定的目标物均未对小鼠显示出刺激子宫内膜增殖的作用。结论:大黄酸-雌激素偶联物保留了雌激素对骨的作用,且降低了其对子宫内膜增殖的刺激作用。  相似文献   

8.
羊齿天门冬的化学成分   总被引:3,自引:0,他引:3       下载免费PDF全文
目的:对羊齿天门冬Asparagus filicinus Ham,ex D.Don的化学成分进行研究。方法:运用多种层析分离方法进行分离纯化,通过^1H NMR、^13C NMR等波谱技术确定化合物的结构。结果:分离并鉴定了10个化合物,其中包括5个蜕皮甾酮类化合物:β-ecdysterone(1)、25-hydroxydacryhainansterone(2)、stachystemneB(3)、5-deoxykaladaslemne(4)、calonystemne(5),2个木脂紊类化合物:syrlngaresinol-4'-O-β-D-glucopyranoside(6)、(+)-nyasol(7),1个苯丙素类化合物:1-O-femloylglyceml(8),p谷甾醇(9)和β-胡萝卜苷(10)。结论:其中化合物2-10均为首次从该植物中分离得到,2为新的天然产物。  相似文献   

9.
米非司酮17位侧链代谢物[17β-羟基-11β-(4-二甲氨基苯基)-17α-(1-丙炔醇基)-4.9雌甾二烯-3-酮(4)]是米非司酮口服后主要代谢物之一。本文以3,3-乙二氧基-5(10),9(11)-雌甾二烯-17-酮(5)为起始物,经环氧化、11β位芳香烃化、17位丙炔醇化、水解制得目标产物(4),中间体和产品均以红外、核磁共振等波谱数据确证结构。  相似文献   

10.
目的 研究药用真菌竹黄Shiraia bambusicola的化学成分。方法 利用硅胶柱色谱及高效制备液相色谱等分离纯化手段,并通过1H-NMR、13C-NMR、MS等波谱学技术进行结构鉴定。结果 共分离得到9个化合物,分别鉴定为3,6,8-三羟基-1-甲基口山酮(1)、3,8-二羟基-6-甲氧基-1-甲基口山酮(2)、2,3,6,8-四羟基-1-甲基口山酮(3)、3,4,6,8-四羟基-1-甲基口山酮(4)、Δ5,10-3β,17α,20β-孕甾三醇(5)、macrosphelide A(6)、(+)-griseofulvin(7)、griseophenone A(8)和抗肿瘤活性成分11,11′-dideoxyverticillin A(9)。结论 化合物1~9均为首次从该真菌中分离得到。  相似文献   

11.
FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…  相似文献   

12.
Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.  相似文献   

13.
In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.  相似文献   

14.
Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.  相似文献   

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16.
目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P<0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P<0.05),PaCO2均随观察时间的延长而降低(P<0.05).观察组治疗有效率为87.5%,显著高于对照组的70.0% (P <0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P<0.05),且观察组明显低于对照组(P<0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.  相似文献   

17.
Evidence obtained from randomized controlled trials (RCTs) has been generally accepted as the gold standard in the evaluation of clinical effectiveness. Readers need to understand the trial design, implementation, results, analysis and interpretation, so as to fully Jnderstand the results of RCTs. Thus, the investigators of RCTs have to report these items in a complete, accurate and clear manner. Since 1998, we have conducted several evaluations on the reporting quality of RCTs published in Chinese journals on traditional Chinese medicine (TCM) and results have shown that there is an urgent need for higher quality RCTs on TCM.  相似文献   

18.
Ankylosing spondylitis is a chronic and progressive disorder with inflammation mainly involving the central axis joints. It mainly affects the cervical spine and the lumbosacral area, with the pathogenesis closely related to the kidney and the Governor Vessel (GV). TCM holds that the syndrome is deficiency in origin and excess in superficiality, which is due to insufficiency of the kidney, deficiency of GV, and blocking of the channels with the invasion of exogenous evil, leading to poor circulation of qi and blood and malnutrition of the bones, muscles and joints. The TCM method of tonifying the kidney and strengthening GV to regulate circulation of qi and blood and check the arthralgia pain should be adopted, with the Kidney-Tonifying and GV Strengthening Decoction (益肾强督汤) prescribed.  相似文献   

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CHEMOTHERAPY playsa greatrolein the treat- ment of malignanttumors,especiallyingynecolo- gicalones.But inanticancerchemotherapy,leuko-cytopeniaisfrequentlytheprimarydose-limitingsideeffect factor.Moreover,cancersarefrequentlychemoresistantbe-causeof overexpressionof P-glycoprotein(P-gp), which isencodedby multidrugresistancegene (MDR1 ) and detectableinup to50% ofhuman cancersand renderscellsresistancetoanticancerdrugs.The safetyand potentialtherapeuticbenefitof mdr1 gene transferredto h…  相似文献   

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