Atrial sympathetic and parasympathetic nerve sprouting and hyperinnervation induced by subthreshold electrical stimulation of the left stellate ganglion in normal dogs

BACKGROUND: Subthreshold electrical stimulation of the left stellate ganglion (LSG) can induce nerve sprouting and sympathetic hyperinnervation in canine ventricles. It is unclear whether a similar neural plasticity involving both sympathetic and parasympathetic innervation also exists in the atria. METHODS AND RESULTS: We applied subthreshold electrical stimulation at 20 Hz (0.45 ms pulse width) or 5 Hz (1.9 ms pulse width) to the LSG in 6 normal mongrel dogs. After 41+/-9 days, the hearts were harvested and the right and left atrium stained for synaptophysin (SYN), growth-associated protein 43 (GAP43), sympathetic nerve markers tyrosine hydroxylase (TH), and parasympathetic marker choline acetyltransferase (ChAT). Tissues from 6 additional healthy dogs were used as controls. The hearts from dogs with LSG electrical stimulation had a higher density of nerve structures immunopositive to the SYN, GAP43, TH, and ChAT (P<.01) in both right and left atria. Nerve density was equal in right and left atria. There were more TH-positive nerve structures than ChAT-positive nerve structures (P<.01) for both right and left atria. No atrial arrhythmia was observed at the second surgery. CONCLUSIONS: Continuous subthreshold electrical stimulation to the LSG induces both sympathetic and parasympathetic hyperinnervation in both right and left atria in normal dogs.     

基于“互联网+”技术的上海市质子重离子医院资产管理的 探索和实践

针对医院资产管理的现状和难点,将平台中的空间管理同资产管理相结合,进行数据交互和功能拓展,不仅使医院空间和资产同步系统化、数据化,而且汇聚了资产管理全维度数据源,达到优化资源配置、降本增效的实践成果,也为建立基于云数据的资产设备全生命周期管理夯实基础。     

急性脑卒中血清、尿、脑脊液β2—微球蛋白的临床研究

目的探讨急性脑卒中与血清、尿、脑脊液β2-MG的相关性及其临床意义.方法应用放射免疫法测定108例脑梗死和94例脑出血1周内β2-MG,并在1～3周后进行复查.同时测定部分尿β2-MG含量,部分做了脑脊液β2-MG含量动态观察.结果1周内血清、尿、脑脊液β2-MG含量(μg/L)脑梗死和脑出血组分别2417±1094和2004±1029、169.1±186.8和276.5±212.0、1994±1283和2983±1179,与正常对照组比较明显升高,P＜0.05或P＜0.001或P＜0.001.治疗1～3周后复查均有不同程度的减低.结论急性脑卒中与血、尿、脑脊液β2-MG有明显相关性,可用于观察病情变化.     

Akt/PKB activation in gastric carcinomas correlates with clinicopathologic variables and prognosis

Akt/protein kinase B (PKB) plays an important role in cell survival. However, the role of Akt in the biology of gastric cancer has not been well studied. We sought to investigate the expression of Akt or phosphorylated Akt (pAkt) in human gastric carcinomas and to analyze the relationship between Akt or pAkt and the clinicopathologic parameters. The expressions of Akt and pAkt were evaluated immunohistochemically in 311 gastric carcinomas using the tissue array method. Akt expression was detected in 74% of the tumors and pAkt expression in 78%. pAkt was highly expressed in the early stage of pTNM (p=0.011). We also found an inverse association between pAkt and lymphatic invasion (p=0.01) or lymph node metastasis (p=0.008). pAkt expression was significantly correlated with a higher survival in patients with stage I carcinomas (p=0.0003). Interestingly, combined evaluation revealed that the group with pAkt-positive and lymph node-negative carcinomas showed a better prognosis than the other groups (p<0.0001). In addition, pAkt was shown to correlate positively with APC (p=0.002) and Smad4 (p<0.0001) expression. These findings suggest that pAkt expression may help to predict the clinical outcome of gastric cancer patients.     

补肾中药对老年大鼠脑组织中胆碱能M受体分布的影响

采用受体放射配基结合分析、原位杂交和放射自显影术等方法,研究胆碱能M受体、M1受体mRNA在脑组织中的分布,观察补肾中药对胆碱能M受体的含量、功能及分布的影响,探讨补肾中药延缓脑组织衰老的机理.结果显示:老年大鼠大脑皮层、海马、纹状体中M受体明显减少,放射自显影的灰度值降低,胆碱能M1受体mRNA在老年大鼠纹状体部位的表达减少,在其他部位的不明显.补肾中药明显增加老年大鼠胆碱能M受体的数量,对脑内胆碱能M1受体mRNA转录水平降低的部位有改善作用.补肾中药可通过改善胆碱能M1受体的mRNA表达、增加脑内胆碱能M1受体数量来延缓脑组织衰老.     

综合医院精神科会诊和精神科门诊病人的临床差异

综合医院中请求精神科会诊的病人通常既有躯体疾病，又有精神疾病，有时还有需要马上处理的急症，因而各科医师处理起来均比较棘手。精神科会诊和精神科门诊工作既有很密切的联系，又有明显的不同。找出精神科会诊病人的特点，有利于精神科医生更好地开展工作，对临床各科医生了解和处理工作中遇到的精神病人也是必要的。广州医学院第二附属医院是一所大型综合性三级甲等教学医院，设有心理科。作者收集了2005年1-8月间该院临床各科会诊的277例病人，将其与同期在精神科门诊首次就诊的971例病人进行对照分析，探讨他们的异同。     

玉屏风颗粒联合粉尘螨滴剂舌下脱敏治疗小儿变应性鼻炎肺脾气虚证临床研究

目的：观察玉屏风颗粒联合粉尘螨滴剂舌下脱敏治疗小儿变应性鼻炎肺脾气虚证的临床疗效。方 法：选择90 例变应性鼻炎肺脾气虚证患儿为研究对象,按随机数字表法分为观察组和对照组各45 例。对照组 给予粉尘螨滴剂舌下脱敏治疗,观察组在对照组基础上给予玉屏风颗粒冲服。1 周为1 个疗程,连续治疗6 个 疗程。比较2 组临床疗效、鼻部症状评分、体液免疫功能指标及炎性因子水平。结果：观察组总有效率为 97.78%,高于对照组86.67% （P＜0.05）。治疗后,2 组鼻塞、鼻痒、喷嚏、流涕评分均较治疗前降低（P＜ 0.05）,且观察组各项评分均低于对照组（P＜0.05）。治疗后,2 组血清免疫球蛋白M （IgM）、免疫球蛋白 G（IgG） 水平高于治疗前,免疫球蛋白E（IgE） 水平低于治疗前（P＜0.05）;且观察组IgM、IgG 水平高于对 照组,IgE 水平低于对照组（P＜0.05）。治疗后,2 组血清白细胞介素-4（IL-4）、白细胞介素-13（IL-13）、 血管细胞黏附因子-1（VCAM-1） 水平均较治疗前降低（P＜0.05）,且观察组血清IL-4、IL-13、VCAM-1 水 平均低于对照组（P＜0.05）。结论：玉屏风颗粒联合粉尘螨滴剂舌下脱敏治疗小儿变应性鼻炎肺脾气虚证的疗 效显著,有利于改善患儿临床症状,提高机体免疫力,减轻炎症反应。     

Relationship between age and effect of early and long-term captopril treatment in patients with acute myocardial infarction

Objective To analyse the relationship between age and treatment with captopril after acute myocardial infarction (AMI). Methods In a randomized trial, 822 patients with a first AMI received conventional medic al treatment, including intravenous thrombolytic therapy and oral aspirin or metoprolol, and then were randomly allocated to captopril ［dosage fr om the first 6.25 mg to 25 mg/t.i.d, 209 younger patients (≤64 years), 269 elderly patients (65-75 years)］ or conventional treatment only (131 younger p atients, 213 elderly). Survival in the four groups was calculated with the Kapl an-Meier method. Multivariate analysis was performed to understand the degree that multi-variables (including age) affect survival in patients taking captopr il in the hospital or during long term follow-up. Results The survival of patients who took captopril correlated significantly with age ( P&lt;0.001). The survival of the elderly patients on captopril treatment did increase (P&lt;0.0001), but not of the younger ones (P&gt;0.05) during hosp italization. During follow-up, the survival of patients who took captopril cor related insignificantly with age (P&gt;0.05), but both the elderly and the you n ger patients have good survival rates (all P&lt;0.01) and lower cardiac events (all P&lt;0.01) when they took captopril.Conclusions Captopril exerts a weak effect on the younger patients but a beneficial effect o n the elderly patients during hospitalization after AMI. However, there is no d ifference between the younger and the elderly in the prognosis, both having good survival and lower cardiac events when they take captopril long term during fol low-up.     

小鼠补体受体Ⅱ型基因改造后感染EB病毒

通过对小鼠补体受体Ⅱ型基因（CR2）进行定点突变,然后将野生型和突变型小鼠CR2/1（MCR2/1）及人CR2（hCR2)用电穿孔方法导入小鼠SP2/0进行表达,采用免疫组织化学等方法鉴定阳性细胞系。用EB病毒对转染阳性细胞进行感染,EBER-1杂交结果显示,仅转染hCR2和突变型MCR2（mtMCR2)的SP2/0细胞感染了EB病毒,前者感染EB病毒的阳性率较后者高很多。这为进一步研究EB病毒进入细胞的机制及建立EB病毒相关的鼻咽癌动物模型奠定了良好的基础。     

假鹰爪化学成分研究(Ⅱ)

目的：寻找番荔枝科假鹰爪属植物假鹰爪Ｄｅｓｍｏｓ ｃｈｉｎｅｎｓｉｓ抗肿瘤活性成分。方法：采用硅胶柱色谱分离化学成分。根据理化性质及波谱分析等方法鉴定结构。结果：从氯仿萃取物中分离鉴定了７个化合物,分别是ｕｎｏｎ－ａｌ（Ⅰ）,黄芩素－７－甲醚（Ⅱ）,去甲氧杜鹃花素（Ⅲ）,去甲氧杜鹃花素－７－甲醚（Ⅳ）,苯甲酸（Ⅴ）,β－谷甾醇（Ⅵ）和豆甾醇（Ⅶ）。结论：该种植中鉴定的黄酮类化合物均为β－环未取代,