高效液相电化学检测器检测鼠松果体褪黑色素

高效液相电化学检测器检测鼠松果体褪黑色素李俊，汤晓林，徐叔云（安徽医科大学临床药理研究所，合肥２３００３２）松果体褪黑色素（ｍｅｌａｔｏｎｉｎ，ＭＴ），化学名５－甲氧基－Ｎ－乙酰色胺、具有多种生理功能［１］，除参与调节生殖系统功能外，还与个体发育、调...     

脑活素与安定合用治疗脑血管病癫痫21例观察

我院自1992年10月～1994年2月，对21例脑血管疾病所致继发性癫瘟病人，应用脑活素与安定合用治疗．控制癫病发作，经临床观察取得满意效果，现报道如下：资料与方法21例中，男14例，女7例；年龄：52岁～71岁，平均年龄63岁；其中脑出皿5例，脑梗塞12例，蛛网膜下腔出血4例。21例中癫病持续状态4例，大发作6例，小发作11例。治疗抢救原发病，降低颅内压，预防感染，纠正水电解质紊乱，改善微循环的基础上。癫痛持续状态时给予安定50毫克十5％葡萄糖500毫升静点；大发作给予安定10毫克肌注或静注；小发作安定5毫克，一日三次口服。用脑活素20…     

Effects of Volatile Anesthetics on Glutamate Transporter, Excitatory Amino Acid Transporter Type 3: The Role of Protein Kinase C

Background: Glutamate transporters play an important role in maintaining extracellular glutamate homeostasis. The authors studied the effects of volatile anesthetics on one type of glutamate transporters, excitatory amino acid transporter type 3 (EAAT3), and the role of protein kinase C in mediating these effects.

Methods: Excitatory amino acid transporter type 3 was expressed in Xenopus oocytes by injection of EAAT3 mRNA. Using two-electrode voltage clamp, membrane currents were recorded before, during, and after application of l-glutamate. Responses were quantified by integrating the current trace and are reported as microcoulombs. Data are mean +/- SEM.

Results: l-Glutamate-induced responses were increased gradually with the increased concentrations of isoflurane, a volatile anesthetic. At 0.52 and 0.70 mm isoflurane, the inward current was significantly increased compared with control. Isoflurane (0.70 mm) significantly increased Vmax (maximum velocity) (3.6 +/- 0.4 to 5.1 +/- 0.4 [mu]C;P < 0.05) but not Km (Michoelis-Menten Constant) (55.4 +/- 17.0 vs. 61.7 +/- 13.6 [mu]m;P > 0.05) of EAAT3 for glutamate compared with control. Treatment of the oocytes with phorbol-12-myrisate-13-acetate, a protein kinase C activator, caused a significant increase in transporter current (1.7 +/- 0.2 to 2.5 +/- 0.2 [mu]C;P < 0.05). Responses in the presence of the combination of phorbol-12-myrisate-13-acetate and volatile anesthetics (isoflurane, halothane, or sevoflurane) were not greater than those when volatile anesthetic was present alone. Oocytes pretreated with any of the three protein kinase C inhibitors alone (chelerythrine, staurosporine, or calphostin C) did not affect basal transporter current. Although chelerythrine did not change the anesthetic effects on the activity of EAAT3, staurosporine or calphostin C abolished the anesthetic-induced increase of EAAT3 activity.     

Perflubron Emulsion in Prolonged Hemorrhagic Shock: Influence on Hepatocellular Energy Metabolism and Oxygen-dependent Gene Expression

Background: Liver dysfunction as a result of impaired oxygen availability frequently occurs following hemorrhage and contributes to delayed mortality. Artificial oxygen carriers may improve oxygen supply to vital organs while avoiding the need for allogeneic transfusion.

Methods: Rats were subjected to hemorrhagic hypotension (mean arterial pressure = 35-40 mmHg for 120 min) and were subsequently resuscitated with (1) stored whole rat blood, (2) pentastarch, or (3) pentastarch combined with perflubron emulsion (PFE; 2.7 or 5.4 g/kg body weight), a second-generation artificial oxygen carrier. Recovery of liver adenosine triphosphate, hepatocellular injury, and expression of glutamine synthetase 1, a gene that is induced by exposure of hepatocytes to low partial pressure of oxygen, were studied at 4 h of resuscitation.

Results: Stored whole blood or pentastarch failed to restore liver adenosine triphosphate concentrations after prolonged shock as compared to sham controls and resulted in increased gene expression of glutamine synthetase 1. Addition of 2.7 g PFE/kg restored liver adenosine triphosphate to control, whereas 5.4 g PFE/kg resulted in adenosine triphosphate concentrations significantly above control. Improved hepatocellular oxygen supply was also confirmed by restoration of the physiologic expression pattern of glutamine synthetase 1. Serum enzyme concentrations were highest after resuscitation with stored blood, whereas addition of PFE failed to further decrease enzyme concentrations as compared to pentastarch alone.     

血清性激素测定对女性不孕症的诊断意义

目的 :对 93例不孕症患者进行血清LH、FSH、E2 、T、PRL的测定 ,探讨女性不孕症患者性激素水平的变化 ,对诊断、治疗的意义。方法 :将 93例不孕症患者分为月经正常组 (31例 )、月经紊乱组 (6 2例 )。应用放射免疫分析法测定 5项性激素 ,选取同一年龄组健康育龄女性 (6 8例 )作为正常对照组。结果 :月经正常组 5项性激素与正常对照组比较 ,差异无显著性 (P >0 .0 5 ) ;月经紊乱组与对照组比较 ,LH、FSH、PRL差异有显著性 (P <0 .0 5 ) ,E2 和T与对照组比较差异无显著性 (P >0 .0 5 )。结论 :测定 5项性激素 ,可较准确、较全面地反映体内内分泌情况 ,对判断女性不孕症的原因、诊断和治疗提供可靠的指标     

微创颅内血肿清除术治疗脑出血65例

我科于1999年10月以来,对各种原因引起的脑出血(出血量≥30 ml)的患者采用贾保祥[1]教授研制的微创颅内血肿清除术进行治疗,取得了良好效果。现报告如下。1临床资料1.1一般资料本组65例,男38例,女27例,发病年龄32岁-83岁,平均年龄56.2岁。其中高血压引起的脑出血63例,急性硬膜下血肿2例,超早期(发病7 h内)就诊28例,早期(发病7 h~3 d)就诊35例,延期(发病3 d以上)2例。1.2临床表现大部分患者发病早期均有头痛或头晕,其中呕吐52例,有高血压史者59例,有头部外伤史2例。神志清醒者17例,昏迷48例,其中深昏迷18例,中度昏迷21例,浅昏迷9例。61例偏瘫…     

MMP-2、TIMP-2在脑胶质瘤中的表达及其意义

目的 分析MMP-2、TIMP-2的表达与脑胶质瘤恶性程度和侵袭性之间的关系。方法 采用免疫组化和原位杂交的方法,检测42例人脑胶质瘤和8例正常脑组织中,MMP-2 mRNA、MMP-2和TIMP-2蛋白表达。结果 MMP-2蛋白表达水平(LI)与肿瘤的分级呈正相关(r=0.872,P<0.01);Ⅲ、Ⅳ级与正常脑组织、Ⅰ～Ⅱ级之间均有显著的差异(P<0.01)。MMP-2mRNA表达与肿瘤的分级同样呈正相关(P<0.01);Ⅲ、Ⅳ级与正常脑组织、Ⅰ～Ⅱ级之间均有显著的差异(P<0.01)。MMP-2蛋白表达增高时TIMP-2蛋白表达也增高;但随着肿瘤恶性程度的增加,TIMP-2表达强度增加的幅度较MMP-2明显减缓。结论 MMP-2的高表达与脑胶质瘤恶性程度呈正相关;TIMP-2与MMP-2间的平衡失调与脑胶质瘤的侵袭性和恶性程度密切相关。     

腰椎管内瘤样钙盐沉着症一例报告

患者，男，45岁。因慢性腰痛伴间歇性跛行进行性加重4年余入院。4年前，患者腰部损伤后逐渐出现慢性痛伴左下肢酸胀不适。近半年患者在站立或行走时均须前倾上半身，以期缓解左下肢疼痛及麻木，且行走不足百米即须下蹲休息。     

氟作业工人的职业性健康监护

电解法生产铝产生的氟化物对工人健康影响的报道较多,而连续多年的动态观察报道较少。我站从74年到86年间对合肥铝厂电解车间工人进行了3次体检,现将检查结果汇总如下。 一、车间劳动卫生学调查 该车间七十年代初采用的是小土槽,呈敞开式生产,无防护措施,故车间氟化物浓度最高,样品超标