重组人骨形成蛋白2骨诱导中神经生长因子及其受体的表达

目的 观察重组人骨形成蛋白2（recombined human bone morphogenetic protein2，rhBMP-2）异位诱导成骨过程中神经生长因子（nerve growth factor，NGF）及其高亲和力受体（tyrosine kinasere ceptor A，TrkA）的表达，探讨NGF在BMP骨诱导中的作用。方法ICR小鼠36只，随机分为实验组和对照组，每组18只，均制备右侧股后部肌袋异位成骨模型。实验组植入含rhBMP-2胶原复合物，对照组仅植入相同体积的胶原海绵。分别于术后7、14和21d取材，行大体、组织学、免疫组织化学观察及RT-PCR检测。结果大体观察实验组术后7d，右股后部可扪及较硬肿块；术后14、21d，肿块硬度增加。对照组各时间点未发现肿块。组织学观察实验组中rhBMP-2胶原复合物具有良好的诱导成骨能力，免疫组织化学结果显示骨诱导材料植入后7d，NGF于成纤维细胞、成软骨细胞、软骨细胞、肥大软骨细胞和成骨细胞中均有阳性表达；14d，NGF阳性表达局限于部分成骨细胞、幼稚骨细胞和成骨样细胞，同时在骨髓中单核巨噬细胞、多核巨噬细胞和破骨细胞中有明显表达；21d，只有少量成骨样细胞和破骨细胞以及骨髓中多核巨噬细胞有NGF表达；TrkA免疫组织化学染色与NGF的表达基本一致。对照组术后各时间点未见成骨现象。实验组NGFmRNA的RT-PCR检测显示，术后7dNGF的mRNA表达最高，14d表达下降，21d只有微量表达。结论rhBMP-2复合物是一种有效的诱导成骨材料。在外源性BMP诱导成骨过程中有明显的NGF及其高亲和力受体TrkA的表达，NGF可以通过直接和间接的方式参与BMP的诱导成骨过程。     

一种胰岛素抵抗的糖尿病特殊类型报告

报告５例对胰岛素抵抗的糖尿病特殊类型病例，其均具有胰岛素应用指征，但使用胰岛素后血糖却反而上升，逐渐增加胰岛素用量，则血糖值亦呈上升趋势。对该类病人的治疗，首先停用胰岛素，改用自制中药制剂及优降糖、降糖灵治疗，取得了良好效果。     

上睑下垂78例手术分析

用额肌悬吊术或提上睑肌缩短术治疗７８例上睑下垂病例，治愈７眼，基本治愈１２眼，矫正不足３眼，矫正过度２眼，笔者认为，术前分析病因；注意提上睑肌肌力的测定；采用适当的手术方法，是手术成功的关键。     

互联网与中医学教育

随着网络技术的飞速发展，互联网对中医学教育产生深远的影响。传统的中医学教育模式正面临着网络技术带来的冲击，文章提出了中医学教育应逐渐把以课堂教授为主的方式转向以网络互动式自学方式的观点。     

Influence of blood supply of the esophageal and gastric stumps on anastomotic healing after esophagogastrostomy in rabbits]

OBJECTIVE: To study how blood supply of the esophageal and gastric stumps influences the anastomotic healing after esophagogastrostomy in rabbits. METHODS: Twenty-seven New Zealand rabbits were randomly divided into 3 groups to receive esophagogastrostomy, followed by different procedures. Except for those in group I, all the rabbits were subjected to procedures of reducing the blood supply either of the esophageal or the gastric stump (group II and group III, respectively), followed by single-layer esophagogastric anastomoses using interrupted 5-0 polypropylene sutures. Ten days after operation, all the rats were killed and the anastomotic sites excised for measurement of the inner diameter, tensile strength, and hydroxyproline concentration. RESULTS: Healing of the esophagograstric anastomosis was obtained in all the rabbits but one with anastomotic leakage in group I and one with perforation of the gastric fundus in group III. The anastomotic inner diameters were similar in all the three groups, whereas the tensile strength and hydroxyproline concentration at the anastomoses decreased in group III in comparison with the other two groups (P<0.05) that had similar measurements (P>0.05). CONCLUSIONS: Extended length of the free esophageal stump does not significantly affect anastomotic healing as decrease of blood supply in the gastric stump.     

Comparison of mortality risk associated with bacteremia due to methicillin-resistant and methicillin-susceptible Staphylococcus aureus.

OBJECTIVE: To quantify the clinical impact of methicillin-resistance in Staphylococcus aureus causing infection complicated by bacteremia in adult patients, while controlling for the severity of patients' underlying illnesses. DESIGN: Retrospective cohort study from October 1, 1995, through December 31, 2003. PATIENTS AND SETTING: A total of 438 patients with S. aureus infection complicated by bacteremia from a single Veterans Affairs healthcare system. RESULTS: We found that 193 (44%) of the 438 patients had methicillin-resistant S. aureus (MRSA) infection and 114 (26%) died of causes attributable to S. aureus infection within 90 days after the infection was identified. Patients with MRSA infection had a higher mortality risk, compared with patients with methicillin-susceptible S. aureus (MSSA) infections (relative risk, 1.7 [95% confidence interval, 1.3-2.4]; P<.01), except for patients with pneumonia (relative risk, 0.7 [95% confidence interval, 0.4-1.3]). Patients with MRSA infections were significantly older (P<.01), had more underlying diseases (P=.02), and were more likely to have severe sepsis in response to their infection (P<.01) compared with patients with MSSA bacteremia. Patients who died within 90 days after S. aureus infection was identified were significantly older (P<.01) and more likely to have severe sepsis (P<.01) and pneumonia (P=.01), compared with patients who survived. After adjusting for age as a confounder, comorbidities, and pneumonia as an effect modifier, S. aureus infection-related mortality remained significantly higher in patients with MRSA infection than in those with MSSA infection, among those without pneumonia (hazard ratio, 1.8 [95% confidence interval, 1.2-3.0]); P<.01. CONCLUSIONS: The results of this study suggest that patients with MRSA infections other than pneumonia have a higher mortality risk than patients with MSSA infections other than pneumonia, independent of the severity of patients' underlying illnesses.     

同种肾组织移植治疗慢性肾功能衰竭性贫血的实验研究

以Ｗｉｓｔａｒ雄性大鼠为受体，建立慢性肾功能衰竭动物模型，将鼠婴肾组织声多点植入受体双侧后肢皮下和筋膜下。结果表明，３０天后移植物的体积由１ｍｍ＾３增至４ｍｍ＾３大小，表面血管网丰富；光镜下见肾小球、肾小管结构正常。促红细胞生成素（ＥＰＯ）着色颗粒主要分布在肾小球区，移植组着色程度明显增高。血红蛋白和４促红细胞生成素随移植的时间延长而逐渐升高，实验结果提示，此方法有可能为治疗慢性肾功能衰竭性贫血提     

延边地区各种肝病患者HBsAg携带者及单项ALT增高者中抗-HCV分布

自1991年11月到1992年2月,用酶联免疫吸附试验对延边地区87例各种肝病患者.65例HBsAg携带者及5例单项ALT增高者血清共157份进行了抗-HCV检测.33例呈阳性,总阳性率为21.0％,其中单项ALT增高者高达80.O％.其次.急性肝炎为35.2％.慢性迁延性肝炎为18.2％.HBsAg携带者为6.2％,肝硬化为0％.     

登革病毒感染后小鼠细胞免疫功能的动态变化

从登革Ⅱ型病毒感染成年ＢＡＬＢ／ｃ小鼠为模型，观察感染后不同时间机体细胞免疫反应的变化。结果表明：感染后７－１４ｄ免疫功能处于激活状态，表现为腹腔巨噬细胞的吞噬功能和脾淋巴细胞对ＣｏｎＡ的反应及ＩＬ－２产生水平都明显高于对照组，感染２１ｄ后免疫功能则转为抑制状态，上棕免疫反应明显低于对照组，脾中的Ｌ３Ｔ４＾＋细胞亚群的百分比逐渐下降；相反，ＬＹＴ２＾＋细胞亚群的百分比逐渐升高，这种抑制现象可维持到     

胜利黄岛原油深度电脱盐的研究：Ⅰ.破乳剂组成的影响

根据胜利黄岛原油的性质，在筛选了几十种破乳剂的基础上，选择了酚醛树脂和环氧环烷，环氧乙烷的嵌段共聚物作破乳剂，探讨了破乳剂组成对原油脱水，脱盐以及界面张力的影响，通过静态脱盐，脱水试验，得到了适合黄岛原油的最佳破乳剂组成。