联合检测尿CC16及FDP对糖尿病肾病的早期诊断价值

目的：探讨糖尿病病人Clara细胞蛋白（CC16）及纤维蛋白降解产物（FDP）在早期诊断糖尿病肾病（DN）中的临床意义。方法：采用酶联免疫法检测136例糖尿病病人尿CC16及FDP水平。结果：糖尿病病人病程越长．尿CC16及FDP水平越高：2型糖尿病CC16水平明显高于1型糖尿病，合并高血压病人CC16求平亦明显升高。肾功能异常病人尿CC16及FDP水平均明显升高。结论：糖尿病病人CC16及FDP水平对DN的早期诊断有一定的价值。     

2型糖尿病肾病PF1+2、D-二聚体检测及意义

2型糖尿病肾病(DN)在患病初始阶段往往容易被忽视,到发现时肾脏的病变已经达到不可逆转的程度,失去了有效防治的最佳时机.探讨2型DN的早期诊断和治疗的方法意义重大.我们以无肾功能损害的2型糖尿病20例为对照,检测血中血浆凝血酶原片断1 2 (PF1 2)、D-二聚体,以观察2型DN的凝血及纤溶异常情况.     

CAD基因原核表达载体的构建及表达产物的活性鉴定

目的构建pCool—GST—ICAD／CAD的表达载体，并存大肠杆菌BL21（DE3）中表达具有生物学活性的CAD核酸酶？方法用PCR扩增CAD基因，将扩增产物克隆入pCool—GST—ICAD载体中构建出pCool—GST—ICAD／CAD表达载体。经酶切和电泳鉴定正确后，在大肠杆菌BL21（DE3）中诱导表达，表达产物经亲和层析、离子交换层析及凝胶过滤等方法分离纯化。最后用SDS—PAGE和DNA降解实验进行鉴定。结果构建了pCool—GST—ICAD／CAD原核表达载体，重组载体转化后表达出毫克级水平的GST—ICAD／CAD蛋白复合体。经分离纯化后得到纯度很好的CAD—ICAD篮白复合体，在SDS—PAGE电泳上旱现清晰的两条蛋白带。经DNA降解实验证明纯化所得的CAD蛋白具有非特异性降解DNA的核酸酶作用。结论成功制备了具有生物学活性的CAD核酸酶，为进一步研究细胞凋亡的作用机制提供了有效的制剂。     

兔肢体爆炸伤合并海水浸泡后在不同复温速率及维持浅低体温下机体炎症反应的特征

Objective To investigate effects of different rewarming rates and maintenance of light hypothermia on inflammatory response in rabbits after limb blast injury, coupled with seawater immersion. Methods First, the model of limb blast injury coupled with seawater immersion was reproduced [the animals were immersed to low body temperature of (31.0±0.5℃)]. Then, 24 adult rabbits were randomly divided into group Ⅰ [the rapid rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (8.94±0.93)℃/h], group Ⅱ [the slow rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (3.88±0.22)℃/h], group Ⅲ [another slow rewarming group, n=6, rewarmed to (38±0.5)℃ at a rate of (2.18±0.12)℃/h], and the H group [the hypothermia group, n =6, rewarmed to (34 - 35)℃ at a rate of (4.49±0.66)℃/h and kept at that temperature till termination of the experiment]. Regulation of ambient temperature and warm transfusion were used to restore body temperature to target levels and maintained there for 6 hours. Blood samples were taken at 5 different times, I.e. Pre-injury time(T0), post-immersion time (T1), the time when rewarming started (T2), 3 h after rewarming (T3), and 6 h after rewarming (T4). Tissue samples from heart, liver, intestinum, lung and kidney were also collected. Levels of TNF-α (tumor necrosis factor-α), IL-1β (interleukin-1β) and IL-6 (interleukin-6) in plasma and MPO (myeloperoxidase) in homogenate were detected. Results Following rewarming, TNF-α, IL-1β, IL-6 concentrations in the plasma of the animals in group Ⅰ and group H were significantly higher when compared with those of the animals in group Ⅱ and group Ⅲ (P<0.05, P<0.01), and MPO activity in homogenate was significantly higher when compared with that of the animals in group Ⅱ and group Ⅲ(P<0.01, P<0.05), and no statistical difference could be seen between group Ⅱ and Ⅲ (P>0.05). Conclusions Rapid rewarming and maintenance of light hypothermia could obviously elevate TNF-α, IL-1β, IL-6 concentrations in plasma and MPO activity in homogenate, following limb blast injury coupled with hypothermia induced by seawater immersion, while slow rewarming (with a rewarming rate of 2-4℃/h) could significantly inhibit TNF-α, IL-1β, IL-6 levels and PMN activity.     

枯草杆菌Bacillus sp F26产过氧化氢酶的发酵条件

从内蒙古呼伦贝尔草原的盐碱湖中分离到的一株低度嗜盐嗜碱细菌Bacillus sp F26，能积累高水平过氧化氢酶（CAT）。对Bacillus sp F26发酵产过氧化氢酶的环境与营养条件的研究结果表明，其积累高水平过氧化氢酶的适宜环境条件为：温度37℃，种龄20-22h，接种量5％，装液量50mL／（250mL的摇瓶）。适宜发酵培养基组成（g／L）为：葡萄糖15，牛肉膏10，玉米浆10，酵母膏5，磷酸二氢钾1，氯化镁0．2，氯化钠50，碳酸钠10。采用上述条件进行摇瓶分批发酵实验，发酵20h，过氧化氢酶酶活达到16．32U／mL，细胞干重为4．12g／L。进一步研究发现，在对数生长后期（16h）添加2mmol／L的H2O2可以明显刺激产酶，在5L的发酵罐上进一步以指数速率方式流加H2O2，由于该流加方式可降低H2O2对细胞的毒害作用，过氧化氢酶酶活达到29．89U／mL，与分批发酵相比提高了92．8％。     

可吸收钉治疗四肢骨折18例体会

自可吸收钉发明并应用于临床以来．因该钉能在体内降解、吸收，免除了二次手术拆钉的痛苦，受到病人的普遍接受。本院自2003年6月以来应用可吸收螺钉治疗骨折18例，取得了较好的效果。报告如下。     

戊二醛消毒液浸泡金属器械的实验观察

戊二醛消毒液广泛应用于各种医疗器械尤其是象麻醉装置、内窥镜、导管以及其它不能加热灭菌的精密仪器等的消毒。在血站应用于止血钳、镊子、剪刀以及储血冰箱等的消毒。可用浸泡、擦拭、喷雾和熏蒸等方式进行消毒。我们将20 g/L戊二醛消毒液与目前临床常用的几种消毒剂进行比较,以观察浸泡金属器械的消毒效果和对金属的腐蚀速率。1方法试验消毒液为20 g/L戊二醛消毒液,含有效氯2000mg/L金星消毒液,含5000 mg/L苯扎溴铵的器械消毒液。取止血钳、剪刀和镊子等金属器械,经冲洗沥干后,放入盛有各种消毒液的搪瓷方盘中,至预定时间,用无菌吸管…