日本血吸虫与HBV合并感染对幽门螺杆菌感染的影响

目的 :探讨HBV与日本血吸虫合并感染对幽门螺杆菌 (Hp)感染的影响。 方法 :利用Hp全菌抗原检测HBV、日本血吸虫单独或合并感染者血清抗HpIgG抗体。 结果 :HBV与血吸虫合并感染时 ,血清HpIgG抗体检出率 ( 85.7% )明显高于HBV或血吸虫单独感染 (阳性率分别为 4 5.5%和 72 .9% ) ,合并感染时血清抗体水平 ( 0 .87± 0 .1 0 )亦高于单独感染 ( 0 .77± 0 .2 0 ,0 .70± 0 .1 7) ,差异有显著性意义。HBV阳性者与HBV阴性者之间Hp 感染率和抗体水平相近。结论 :HBV和血吸虫合并感染对Hp感染具有协同作用     

紫外线致弱尾蚴免疫兔血清筛选血吸虫成虫cDNA文库

目的 :寻找照射致弱尾蚴中起免疫保护作用的抗原分子 ,为血吸虫病疫苗研究提供新的候选抗原。方法 :用紫外线照射致弱尾蚴免疫兔血清筛选日本血吸虫 (Schistosomajaponicum ,Sj)成虫cDNA文库 ,并对阳性克隆的插入基因片段进行PCR扩增及测序分析。结果 :经三轮筛选 ,获 10个阳性克隆 ,其插入的SjcDNA片段大小为 1 5～1.8kb。初步测序获 5个部分序列 ,其中 2个序列分别与Sj动力蛋白轻链 5 (DLC 5 )及Sj线粒体基因明显同源 ,其余 3个序列为未知的新基因片段。结论 :获得的阳性克隆插入基因片段可能为编码抗日本血吸虫感染的抗原基因     

Pro-healing effect of Cinnamomum zeylanicum bark

The ethanol extract of the bark of Cinnamomum zeylanicum was evaluated for wound healing activity in Wistar rats. The extract was administered by the oral route at a dose of 250 mg/kg and 500 mg/kg body weight (1/8 and 1/4 of LD(50), respectively) for all the wound models selected, excision, incision and dead space wounds. The extract significantly enhanced the wound breaking strength in the case of incision wound, the rate of wound contraction and the period of epithelization in the case of excision wound. The granulation tissue weight, its breaking strength and its hydroxyproline content was also increased by the extract in the dead space wound.     

肉桂及其混伪品的HSGC-MS的实验比较研究

目的 比较肉桂及其混伪品的顶空气相指纹图谱，以此鉴别肉桂药材的真伪。方法 采用顶空气相色谱-质谱（HSGC-MS）计算机隧和技术，分别测定肉桂，桂皮，柴桂的指纹图谱并加以比较。结果 肉桂的顶空气相指纹图谱与混伪品桂皮，柴桂有明显区别，其指纹特征峰位于10.60,15.60min处，主要成分为桂皮醛。结论 此方法能有效地鉴别肉桂及其混伪品，具有快速，准确，操作简单，不需对样品进行提取分离，可直接进行测定的特点。     

快速诊断日本血吸虫病胶体金免疫层析法的建立

目的 研发一种快速、简便、微量的血吸虫病诊断试剂.方法 应用胶体金免疫层析法(GICA),经血吸虫病粪检阳性患者和健康人不同血清用量的测试,选择最佳血清用量,建立快速诊断血吸虫病的新方法.结果 GICA快速诊断血吸虫病最佳血清用量为10μL,检测血吸虫病敏感性和特异性分别达到93.2%和95.0%,Youden指数为0.882,检测结果与斑点金免疫渗滤法及间接血凝试验比较,三者差异无统计学意义(x2=1.339、1.049,P＞0.05).结论 应用GICA快速诊断血吸虫病,不仅具有试剂敏感、特异,且血清用量少,操作简便,更适合于血吸虫病流行病学调查及现场应用.     

Antibacterial effects of 18 medicinal plants used by the Khyang tribe in Bangladesh

Context: The resistance of bacteria to antibiotics is raising serious concern globally. Asian medicinal plants could improve the current treatment strategies for bacterial infections. The antibacterial properties of medicinal plants used by the Khyang tribe in Bangladesh have not been investigated.

Objective: The present study examines the antibacterial properties of 18 medicinal plants used by the Khyang tribe in day-to-day practice against human pathogenic bacteria.

Materials and methods: Leaves, bark, fruits, seeds, roots and rhizomes from collected plants were successively extracted with hexane, ethyl acetate and ethanol. The corresponding 54 extracts were tested against six human pathogenic bacteria by broth microdilution assay. The antibacterial mode of actions of phytoconstituents and their synergistic effect with vancomycin and cefotaxime towards MRSA was determined by time-killing assay and synergistic interaction assay, respectively.

Results and discussion: Hexane extract of bark of Cinnamomum cassia (L.) J. Presl. (Lauraceae) inhibited the growth of MRSA, Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae and Acinetobacter baumannii with MIC values below 100 µg/mL. From this plant, cinnamaldehyde evoked at 4?×?MIC in 1?h an irreversible decrease of MRSA count Log10 (CFU/mL) from 6 to 0, and was synergistic with vancomycin for MRSA with fractional inhibitory concentration index of 0.3.

Conclusions: Our study provides evidence that the medicinal plants in Bangladesh have high potential to improve the current treatment strategies for bacterial infection.     

Isosamidin,an extract of Peucedanum japonicum,inhibits phenylephrine‐mediated contractions of the human prostate in vitro

Isosamidin is a pharmacologically active compound extracted from Peucedanum japonicum which is used as a health food in East Asia. Our preliminary animal data suggested that isosamidin may have sufficient potency to treat patients with lower urinary tract symptoms suggestive of benign prostatic hyperplasia or overactive bladder. However, the efficacy of isosamidin in humans is unknown. Here, we examined whether isosamidin inhibits agonist‐stimulated contractions in isolated human bladder and prostate tissue strips in vitro. Human bladder and prostate strips obtained from 9 to 10 male patients, respectively, were suspended in organ baths. After administration of isosamidin (10, 30, and 100 μM), concentration–response curves to agonists (acetylcholine or phenylephrine) were constructed by cumulatively increasing agonist concentration. Isosamidin inhibited phenylephrine‐stimulated contractions of isolated human prostate tissue strips in a concentration‐dependent manner, with significant differences observed between control and 100 μM isosamidin. In contrast, isosamidin had no effect on acetylcholine‐stimulated contractions of isolated human bladder tissue strips. Isosamidin may have pharmacological potency in the treatment of male patients with lower urinary tract symptoms suggestive of benign prostatic hyperplasia. Clinical studies are needed to confirm the efficacy and safety of isosamidin in humans.     

不同地区大蓟炭止血药效与成分差异的初步研究

目的:研究不同地区大蓟炒炭后止血药效和成分的差异.方法:昆明小鼠随机分成阳性对照组、空白组、樟树大蓟炭组、安徽大蓟炭组、湖南大蓟炭组、河北大蓟炭组.连续给药3天后,采用小鼠断尾法和玻片法分别测量各组小鼠尾部出血时间及凝血时间,并用HPLC法初步比较不同地区大蓟炭的成分差异.结果:樟树、湖南地区大蓟止血效果要优于河北地区产大蓟,安徽地区大蓟没有止血效果,且呈现一定的促进出血效果.HPLC图谱显示不同地区产大蓟虽经鉴定均为正品大蓟,但成分差异较大.结论:不同产地大蓟止血效果、成分均存在显著差异,为进一步揭示大蓟炒炭止血增效提供了科学依据.     

香樟叶挥发油的止痒作用研究

[目的]探讨香樟叶挥发油的止痒作用及其可能的作用机制。[方法]采用4-氨基吡啶诱导小鼠瘙痒模型,2,4-二硝基氟苯诱导小鼠变态反应性接触性皮炎模型,探讨香樟叶挥发油的止痒作用。[结果]4-氨基吡啶瘙痒模型中,与模型组相比,香樟叶挥发油高、低剂量10 min内舔体次数均显著减少（P<0.01）,香樟叶挥发油高剂量组小鼠血清白三烯B₄（LTB₄）和5-羟色胺（5-HT）的水平显著降低（P<0.05）,但香樟叶挥发油各组对白细胞介素-4（IL-4）均无显著性影响（P>0.05）。病理检查显示模型组出现大量炎细胞,香樟叶挥发油高、低剂量组未见炎细胞,挥发油低剂量组真皮层轻度增厚。2,4-二硝基氟苯变态反应性接触性皮炎模型中,与模型组相比,香樟叶挥发油高剂量组小鼠血清LTB₄的水平显著降低（P<0.05）,但香樟叶挥发油各组对IL-4均无显著性影响（P>0.05）。[结论]香樟叶挥发油具有显著的止痒作用,降低瘙痒小鼠血清中5-HT和LTB₄的量是其作用机制之一。     

田基黄的研究进展

目的：综述田基黄(又名地耳草)的化学成分、药理作用及临床用注射液的研究和进展。方法：根据国内外文献进行归纳、综述。结果：田基黄的化学成分中已有近50种的化合物被提取分离。药理学方面研究证明：田基黄具有抑菌作用，保肝作用，抑制肿瘤作用，对心血管系统作用等。在现代临床研究中，田基黄提炼制成针剂用于临床治疗急、慢性肝炎等。结论：田基黄中含有多种化学成分，需进一步开发其活性成分并深入研究药理作用机制。