狂犬病诊治进展

人类的狂犬病是一种中枢神经系统病毒感染性疾病,常由患狂犬病动物的唾液污染伤口而传染;一旦出现症状,病人基本上100%死亡,从狂犬病后康复的病例极为罕见,仅有3例报道。临床表现为特有的恐水怕风、咽肌痉挛、进行性瘫痪等。狂犬病在87个国家有流行,主要流行于东南亚、非洲及拉     

布洛芬对乙酰氨基酚退热疗效对比

长期以来,发热是儿科关注的问题,发热程度有助于判断病情,儿童多因与病情不成比例,轻微疾病即可出现发烧,父母常常不了解这一现象而引起不必要的恐慌,随意应用退热药即成为儿科普遍的现象[1].采用安全有效的退热药物值得临床探讨.     

Establishment of a mouse model of cancer cachexia with spleen deficiency syndrome and the effects of atractylenolide I

Cancer cachexia is a multifactorial metabolic syndrome that affects～50%–80%of cancer patients,and no effective therapy for cancer cachexia is presently available.In traditional Chinese medicine,a large portion of patients with cancer cachexia was diagnosed as spleen deficiency syndrome and treated with tonifying TCMs that produce clinic benefits.In this study we established a new animal model of spleen deficiency and cancer cachexia in mice and evaluated the therapeutic effects of atractylenolide I,an active component of tonifying TCM BaiZhu,in the mouse model.Cancer cachexia was induced in male BALB/c mice by inoculation of mouse C26 colon adenocarcinoma cells,whereas spleen deficiency syndrome was induced by treating the mice with spleen deficiency-inducing factors,including limited feeding,fatigue,and purging.The mouse model was characterized by both cachexia and spleen deficiency characteristics,including significant body weight loss,cancer growth,muscle atrophy,fat lipolysis,spleen,and thymus atrophy as compared with healthy control mice,cancer cachexia mice,and spleen deficiency mice.Oral administration of atractylenolide I(20 mg·kg?1per day,for 30 days)significantly ameliorated the reduction in body weight and atrophy of muscle,fat,spleen,and thymus in mice with spleen deficiency and cachexia.The established model of spleen deficiency and cancer cachexia might be useful in the future for screening possible anticachexia TCMs and clarifying their mechanisms.     

精于颐养走过百年——许德珩的长寿要诀

许德珩一生精于摄生颐养,享年100岁.他的养生要诀主要有如下几条: 重视饮食条理 许老的饮食以清淡为主,定时定量,不饱食,不偏食,不挑食.早餐一般是一碗稀饭,一个小馒头,少许咸菜;午餐以蔬菜为主,加上少许牛肉(晚年不食猪肉),主食100克;晚餐则以素为主.一日三餐既不随意增减,更不暴饮暴食.饮酒微量,只喝一点果酒,不饮白酒等烈性酒.爱吃新鲜水果,不吃甜食.     

浅谈如何加强医疗器械的管理

医疗器械的应用在疾病的诊断、治疗及预防等各个环节都发挥着不可替代的作用,其质量的好坏直接关系到人民群众的身体健康和生命安危.2000年国务院颁布了第一部医疗器械监管法规-<医疗器械监督管理条例>,标志着我国医疗器械监管正式走上了法制化轨道,但是由于种种原因,目前我国在医疗器械的生产、经营以及使用等各个环节都存在着较为普遍和严重的问题,其监管已显得相对滞后,成为食品药品部门监管中的一个"软肋",以至于频频出现像钢板等植入性器械断裂现象和发生举国震惊的"眼球事件".本文就我县医疗器械的经营、使用现状和如何加强对医疗器械的监管作以下分析和探讨.     

黑米:滋肾补胃益气血

黑米因外皮乌黑而得名,又称补血糯米、贡米、黑珍珠,是一种具有诸多保健功效的珍贵稻米.黑米含有淀粉、蛋白质、脂肪、多种维生素,又含钙、磷、镁、铁、锌、钼、硒等多种矿物质和微量元素.黑米所含蛋白质不但比普通大米高37%,而且其中氨基酸的含量亦比白米高25.4%,人体所需的赖氨酸、精氨酸、氮氨酸、色氨酸等,黑米中也都具有,营养价值很高.     

捕捉蛛丝马迹,让恶性肿瘤早现身——常见恶性肿瘤发病的早期信号(二)

痣 痣可发生在皮肤的任何部位,如面部、手掌、脚底、腰部、前胸、后背和阴囊等处.痣如出现下述现象,可能是癌变信号:反复发生感染;突然有痒感,不由自主地用手搔抓,甚至抓破出血;表面潮湿或有结痂形成;原为棕色,逐渐颜色变深变黑;有出血倾向,稍微触碰即发生出血;周围有炎性红晕,触之有痛感;痣上原有毛发突然自行脱落;痣的中央部出现硬结或自发性出血、溃疡形成和周围出现散在的呈卫星状小黑痣.     

克隆病并穿孔1例

1病例介绍病人,女,35岁,因突发下腹部疼痛半小时就诊,病史诉说欠清,(家属补充,腹痛时间约4～5年),查体:脉搏96次/分,血压84/60 mmHg,表情淡漠、四肢湿冷。全腹压痛呈板状腹,叩诊移动浊音可疑,以脐下压痛明显,B超提示腹腔内有少许积液,右侧卵巢囊肿,约44 cm大小。实验室检查白细胞16×109/L,中性0.80。考虑腹腔脏器穿孔,在全麻下行剖腹探查,取下腹正中切口进腹,腹腔内有臭味溢出,吸出浑浊性液体约250 ml,有食物残渣,距回盲部约50 cm处,向上见约45 cm长的回肠充血水肿     

刺五加注射液致过敏反应2例报告

例1:患者男性,51岁,因患冠心病人院治疗.给予刺五加注射液60mL加5%葡萄糖250mL中静脉注射.输人约50mL时,患者面色潮红,瘙痒感,开始发现前臂有散在的米粒大小的红色小点,继而遍及颈、四肢部以及全身出现点状红色皮疹,甚痒.立即停药,给予扑尔敏、Vc、葡萄糖酸钙口服无效.改为肌注盐酸肾上腺素、静滴地塞米松,1天后上述症状逐渐减轻.     

小便带血,源于结石

市运动会就要开幕了,体校的学生都在紧张地"备战",准备在运动会上崭露头角.小董一直是学校的"尖子生",这段时间练得更加刻苦.可是,最近每次锻炼小董都会感到小腹疼痛难忍,而且小便常常带血,他又怕去医院会耽误比赛,一直不敢告诉老师和家人.后来,还是同宿舍的小张告诉了老师.老师得知这种情况后,马上带着小董到了医院.医生做了X线摄片检查,才知道小董是患了尿路结石.     

Efficacy of gut lavage,hemodialysis, and hemoperfusion in the therapy of paraquat or diquat intoxication

Clinical and in vitro investigations were carried out to test the efficacy of gut lavage, hemodialysis, and hemoperfusion in the treatment of poisoning with paraquat or diquat. In a patient suffering from diquat intoxication 130 times more diquat was removed by gut lavage 30 h after ingestion than was removed by complete aspiration of the gastric contents.Determination of in vitro clearances for paraquat and diquat by hemodialysis showed that, at serum concentrations of 1–2 ppm, such as are frequently encountered in poisoning in man, toxicologically relevant quantities of herbicide cannot be removed from the body. At a concentration of 20 ppm, on the other hand, hemodialysis proved to be effective, the clearance being 70 ml/min at a blood flow rate of 100 ml/min. The efficacy of hemoperfusion with coated activated charcoal was on the whole better. Especially at concentrations around 1–2 ppm, the clearance values for hemoperfusion were some 5–7 times higher than those for hemodialysis.In a patient suffering from paraquat poisoning, both hemodialysis as well as hemoperfusion were carried out. The in vitro results could be confirmed: At serum concentrations of paraquat less than 1 ppm no clearance could be obtained by hemodialysis while by hemoperfusion with activated charcoal quite high clearance values were measured and the serum level dropped down to zero.

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Zusammenfassung Klinische Untersuchungen und Laboratoriumsversuche wurden durchgeführt, um die Wirksamkeit von Darmspülung, Hämodialyse und Hämoperfusion bei Paraquat- und Deiquat-Vergiftungen zu prüfen.Bei einem Patienten wurde 30 Std nach Deiquat-Aufnahme durch Darmspülung 130mal mehr Deiquat entfernt als durch vollständige Aspiration des Mageninhaltes. In vitro-Versuche ergaben, daß bei Blutserumkonzentrationen von 1–2 ppm, die bei Vergiftungen oft gemessen werden, durch Hämodialyse keine toxikologisch relevanten Paraquat- oder Deiquat-Mengen entfernt werden können. Dagegen erwies sich die Hämodialyse bei 20 ppm und einer Blutumlaufgeschwindigkeit von 100 ml/min mit einer Clearance von 70 ml/min als wirksam. Die Hämoperfusion mit beschicheter Aktivkohle war in diesen Versuchen aber eindeutig überlegen, denn insbesondere bei Konzentrationen um 1–2 ppm waren die Clearance-Werte 5–7mal höher als bei der Hämodialyse.Die in vitro-Ergebnisse wurden bei einem Patienten mit einer Paraquat-Vergiftung bestätigt: Bei Konzentrationen unter 1 ppm war die Hämodialyse wirkungslos, während durch Hämoperfusion relativ hohe Clearance-Werte erreicht wurden, so daß der Serumspiegel rasch unter die Nachweisgrenze abfiel.

     

In vitro studies on sterically stabilized liposomes (SL) as enzyme carriers in organophosphorus (OP) antagonism

This study describes a new approach for organophosphorous (OP) antidotal treatment by encapsulating an OP hydrolyzing enzyme, OPA anhydrolase (OPAA), within sterically stabilized liposomes. The recombinant OPAA enzyme was derived from Alteromonas strain JD6. It has broad substrate specificity to a wide range of OP compounds: DFP and the nerve agents, soman and sarin. Liposomes encapsulating OPAA (SL)* were made by mechanical dispersion method. Hydrolysis of DFP by (SL)* was measured by following an increase of fluoride ion concentration using a fluoride ion selective electrode. OPAA entrapped in the carrier liposomes rapidly hydrolyze DFP, with the rate of DFP hydrolysis directly proportional to the amount of (SL)* added to the solution. Liposomal carriers containing no enzyme did not hydrolyze DFP. The reaction was linear and the rate of hydrolysis was first order in the substrate. This enzyme carrier system serves as a biodegradable protective environment for the recombinant OP-metabolizing enzyme, OPAA, resulting in prolongation of enzymatic concentration in the body. These studies suggest that the protection of OP intoxication can be strikingly enhanced by adding OPAA encapsulated within (SL)* to pralidoxime and atropine.     

Aquatic Insects and Trace Metals: Bioavailability,Bioaccumulation, and Toxicity

Abstract

The uptake of metals from food and water sources by insects is thought to be additive. For a given metal, the proportions taken up from water and food will depend both on the bioavailable concentration of the metal associated with each source and the mechanism and rate by which the metal enters the insect. Attempts to correlate insect trace metal concentrations with the trophic level of insects should be made with a knowledge of the feeding relationships of the individual taxa concerned. Pathways for the uptake of essential metals, such as copper and zinc, exist at the cellular level, and other nonessential metals, such as cadmium, also appear to enter via these routes. Within cells, trace metals can be bound to proteins or stored in granules. The internal distribution of metals among body tissues is very heterogeneous, and distribution patterns tend to be both metal and taxon specific. Trace metals associated with insects can be both bound on the surface of their chitinous exoskeleton and incorporated into body tissues. The quantities of trace meals accumulated by an individual reflect the net balance between the rate of metal influx from both dissolved and particulate sources and the rate of metal efflux from the organism. The toxicity of metals has been demonstrated at all levels of biological organization: cell, tissue, individual, population, and community. Much of the literature pertaining to the toxic effects of metals on aquatic insects is based on laboratory observations and, as such, it is difficult to extrapolate the data to insects in nature. The few experimental studies in nature suggest that trace metal contaminants can affect both the distribution and the abundance of aquatic insects. Insects have a largely unexploited potential as biomonitors of metal contamination in nature. A better understanding of the physico-chemical and biological mechanisms mediating trace metal bioavailability and exchange will facilitate the development of general predictive models relating trace metal concentrations in insects to those in their environment. Such models will facilitate the use of insects as contaminant biomonitors.     

Steroidal sapogenin contents in some domestic plants

In order to find out the values of the steroid resources for the future use. the compositions and contents of steroidal sapogenins from 13 domestic plants have been investigated. As a result,Dioscorea nipponica, D. quinqueloba andSmilax china were found to have large amount of diosgenin. And pennogenin inTrillium kamtschaticum andParis verticillata, yuccagenin inAllium fistulosum, hecogenin inAgave americana and neochlorogenin inSolanum nigum were appeared to be major steroidal sapogenins.     

Alzheimer’s disease – current trends in basic and clinical research. Highlights from the 16th ECNP

Advances in the molecular biological knowledge of neuronal nicotinic acetylcholine receptors (nAChRs) have led to a growing interest by the pharmaceutical industry in the development of novel compounds that selectively modulate nAChR function. The ability of (-)-nicotine, an activator of nAChRs, to enhance attentional aspects of cognition in animals and humans, to exert neuroprotective and anxiolytic-like effects, and presumably to mediate the negative correlation between smoking and Alzheimer's (and Parkinson's) Disease, has focused interest on the potential therapeutic utility of modulators of nAChR function for treatment of some of the deficits associated with these progressive, neurodegenerative conditions. Numerous compounds are known which activate nAChRs and which might serve as lead compounds toward the development of such agents. The pharmacologic diversity of neuronal nAChR subtypes suggests the possibility of developing selective compounds which would have more favourable side-effect profiles than existing agents. This broader class of agents, collectively called cholinergic channel modulators (ChCMs), is anticipated to encompass compounds which would have more favourable side-effect profiles than existing agents, which generally exhibit low selectivity. This selectivity may be achieved by preferentially activating some subtypes of nAChRs (i.e., Cholinergic Channel Activators, ChCAs) or inhibiting the function of other subtypes (Cholinergic Channel Inhibitors, ChCIs). An overview of the biology of nAChRs and the rationale for the use of ChCMs for the treatment of dementia related to neurodegenerative diseases are presented, followed by a discussion of lead compounds and compounds under consideration for clinical evaluation.