食管癌患者手术前后血浆Hcy和血清FA、维生素B12含量检测及其临床意义

 目的 探讨食管癌患者手术前后血浆Hcy和血清FA、维生素B12含量的变化及意义.方法 应用酶免法和化学发光法对40例食管癌患者进行了手术治疗前后血浆Hcy和血清FA、维生素B12含量动态检测,并与40名健康人比较.结果 食管癌患者手术前血浆Hcy含量高于健康人(P<0.01),FA含量低于健康人(P<0.01);食管癌患者手术后1个月血浆Hcy含量高于健康人(P<0.05),FA含量低于健康人(P<0.01);食管癌患者手术后3个月血浆Hcy和血清FA含量与健康人比较差异无统计学意义(P>0.05),食管癌患者手术前后维生素B12含量与健康人比较差异均无统计学意义(P>0.05).结论 检测食管癌患者血浆Hcy和血清FA含量的变化对观察病情和预后判定具有一定的参考价值.     

新疆哈萨克族健康人群肾功能与中心动脉反射波增强指数和颈动脉内膜中层厚度的相关性分析

目的：探讨新疆哈萨克族健康人群的肾功能与中心动脉反射波增强指数（AIx）和颈动脉内膜中层厚度（CIMT）的关系。方法从新疆塔城地区筛选临床健康居民546例,检测血压、血肌酐、血脂等指标,用中国人校正的 MDRD公式计算肾小球滤过率（GFR）,用PWA仪测定中心动脉压,彩色多普勒检测颈动脉内膜中层厚度,运用多元线性回归分析多种因素对 GFR的影响,观察肾功能的改变与中心动脉反射波增强指数和颈动脉内膜中层厚度的关系。结果随着年龄的增长,肾功能随增龄逐渐减退,而中心动脉反射波增强指数呈增高的趋势;肾功能及中心动脉反射波增强指数的增龄改变存在性别差异（P ＜0．05）;各年龄组女性的中心动脉反射波增强指数较男性升高更为明显（P ＜0．05）;相关性分析结果显示 GFR与中心动脉反射波增强指数呈负相关（r ＝-0．127, P ＜0．05）。多元线性回归分析显示年龄、Alx是新疆哈萨克族人群GFR的影响因素（β值分别为-0．272、-0．137, P 均＜0．01）。结论在新疆哈萨克族健康成年人中,年龄和中心动脉反射波增强指数可能是肾功能衰退的影响因素,而与颈动脉内膜中层厚度无关。     

卵巢切除大鼠在不同时期RANKL、OPG蛋白表达的变化及与BTMs的相关性

目的探讨卵巢切除大鼠在不同时期骨保护素(OPG)、核因子κB受体活化因子配体(RANKL)的表达及与骨转换标志物(BTMs)的关系。方法将SD雌性大鼠随机分成假手术组(Sham)和去卵巢骨质疏松模型组(OVX),模型组行双侧卵巢切除术,术后第2、6、10、14周分批取材,采用Western blot检测各时期大鼠骨组织OPG、RANKL蛋白表达,采用Elisa检测各时期大鼠血清骨转换标志物BGP、BALP、CTX-I、TRAP-5b的变化。结果 OVX组在术后第2周(P0.01)和第10、14周(P0.05)骨组织RANKL蛋白表达均较Sham组显著升高,OPG蛋白表达在第2周(P0.01)和第6周(P0.05)均显著降低。(2)与Sham组相比,OVX组术后第2周血清BGP、BALP、CTX-I(P0.05)和TRAP-5b(P0.01)水平均显著升高;OVX组术后第6周血清BGP、BALP水平显著升高(P0.01),CTX-I(P0.05)和TRAP-5b(P0.01)水平显著下降;OVX组术后第10、14周血清CTX-I(P0.05)、BALP(P0.01)水平显著升高。(3)骨转换标志物血清CTX-I、TRAP-5b水平与骨OPG表达成负相关(P0.01),与骨RANKL表达成正相关(P0.05)。结论相关性分析显示骨转换标志物CTX-I、TRAP-5b与骨OPG成负相关,与骨RANKL成正相关。     

新疆喀什维吾尔族人群血清25羟维生素D及血钙与血压的相关性

目的探讨维吾尔族受检人群的血清25羟维生素D[25(OH)D]及血钙水平与血压的关系。方法采用分层随机抽样的方法于2012年12月-2013年1月在新疆喀什地区纳入维吾尔族受检者共232例,其中原发性高血压患者132例(高血压组),正常对照者100例(正常对照组)。检测其血压、血清25-羟维生素D和血钙、磷相关指标,分析血清25(OH)D及血钙水平对血压的影响。结果维吾尔族原发性高血压患者血清25(OH)D、血钙水平低于维吾尔族正常对照组,体质指数高于维吾尔族正常对照组,差异有统计学意义;维生素D缺乏组患者收缩压高于维生素D不足组;血钙低于维生素D不足组,差异均有统计学意义;血清25(OH)D每下降6ng/mL,收缩压升高的危险性增加0.68;体质指数每增加5kg/m2,血压升高的危险性增加1.78;血钙每增加0.2mmol/L,舒张压≥90mmHg的危险性降低0.42。结论新疆维吾尔族受检人群普遍存在维生素D缺乏,高血压患者维生素D水平更低;维吾尔族血清25(OH)D水平、体质指数对血压有一定的影响,血钙水平对舒张压有一定的影响。     

Preparation of a carbon fibre-reinforced carbon aerogel and its application as a high-temperature thermal insulator

Carbon aerogels (CAs) have attracted attention in thermal insulation. However, the traditional sol–gel method for preparing them involves time-consuming solvent exchange and rigorous supercritical drying processes, and the obtained CAs are brittle and crumble easily. To address these problems, a carbon fibre-reinforced carbon aerogel (CF/CA) was prepared via combining a resorcinol–furfural (RF) gel containing a salt (ZnCl₂) with polyacrylonitrile (PAN) fiber felt. The CF/CA not only has low thermal conductivity (0.6904 W m⁻¹ K⁻¹) even at an ultra-high temperature of 1800 °C in an argon atmosphere but also exhibits relatively high compressive strength (6.10 MPa, 10% ε) and a low density of 0.68 g cm⁻³. The CF/CAs can be used as ultrahigh-temperature thermal insulators (under inert atmospheres or vacuum) in thermal protection systems such as space vehicles or industrial high temperature furnaces. Our novel strategy may lead to lower-cost and large scale industrial processes of CF/CAs.

A carbon fiber reinforced carbon aerogel (CF/CA) was prepared by impregnating polyacrylonitrile (PAN) fibre felts with a resorcinol (R)–furfural (F) sol containing a salt (ZnCl₂), followed by ageing and pyrolysis. The RF sol containing the salt was synthesized by direct polymerisation of R and F in methanol (MeOH) using ZnCl₂ as a salt template. Compared with the traditional sol–gel method for preparing CF/CAs, this procedure eliminates the need for solvent-exchange and supercritical-fluid drying processes. This novel strategy may lead to lower-cost and large scale industrial processes of CF/CAs.     

Antiapoptotic activity of autocrine interleukin-22 and therapeutic effects of interleukin-22-small interfering RNA on human lung cancer xenografts

PURPOSE: Non-small cell lung carcinoma (NSCLC) is one of most common malignant diseases and usually is resistant against apoptosis-inducing chemotherapy. This study is to explore the antiapoptotic mechanisms of interleukin (IL)-22 in human lung cancer. EXPERIMENTAL DESIGN: Nineteen cases with stage I to III NSCLC were collected to determine the expression of IL-22. Stable transfection of human IL-22 cDNA into A549 and PG cells and transfection of IL-22-RNA interference (RNAi) into these cancer cell lines were done to reveal the molecular mechanisms of IL-22. RESULTS: It was found that IL-22 was highly expressed in primary tumor tissue, malignant pleural effusion, and serum of patients with NSCLC. IL-22R1 mRNA was also detected in lung cancer tissues as well as lung cancer cell lines. Overexpression of IL-22 protected lung cancer cell lines from serum starvation-induced and chemotherapeutic drug-induced apoptosis via activation of STAT3 and its downstream antiapoptotic proteins such as Bcl-2 and Bcl-xL and inactivation of extracellular signal-regulated kinase 1/2. Exposure to blocking antibodies against IL-22R1 or transfection with the IL-22-RNAi plasmid in vitro resulted in apoptosis of these lung cancer cells via STAT3 and extracellular signal-regulated kinase 1/2 pathways. Furthermore, an in vivo xenograft study showed that administration of IL-22-RNAi plasmids significantly inhibited the human tumor cell growth in BALB/c nude mice. CONCLUSIONS: Our study indicates that autocrine production of IL-22 contributes to human lung cancer cell survival and resistance to chemotherapy through the up-regulation of antiapoptotic proteins.     

针灸治疗枕下三角区综合征29例

枕下三角综合征以头痛、眩晕、颈枕部不适、失眠、神经衰弱等表现为主.近1年来,笔者用针灸治疗枕下三角区综合征29例取得良好效果,现总结如下.     

癌症患者内外向性格测验的初步报告

此研究采用心理测验测试 1982年北京部分癌症患者与正常对照者内外向性格的特点。结果是上述两组之间无显著性差别 ( 0 .10 >P>0 .0 5 )     

生物液晶中马尔它十字成因初探

本文对生物液晶中马尔它十字的成因作了研究,作者认为:马尔它十字是通过生物液晶的线偏振光的干涉图样。由于生物液晶的光轴方向有随意性,故在正交偏光显微镜下观察时,将看到不同的干涉图样,呈现为不同形状的马尔它十字。     

The Role of Innate Immune Cells in the Response of Heat-Treated Mycobacterium tuberculosis （M.tb） Antigens Stimulating PBMCs

The proliferation response of γδT cells to the antigen from heat-treated Mycobacterium tuberculosis H37Ra(M.tb Ag)was used as a good model in γδT cell research.From preliminary research it is found that activatedNK cells positively elevated γδT cells proliferation after simulating PBMCs with M.tb Ag.To investigatedifferent behaviors of NK cells,γδNKT cells,γδT cells and relationships between these cell subsets,activationand proliferation of different cell subsets of PBMCs in response to M.tb Ag were analyzed.We demonstratedthat NK cells,γδNKT cells and γδT cells could be activated after stimulation with M.tb Ag.γδNKT cells and γδTcells proliferated while the number of NK cells decreased after 11 day-simulation with M.tb Ag.Meanwhile,atthe early time of stimulation the cytotoxicity of PBMCs was enhanced.Cellular & Molecular Immunology.2004;1(6):467-470.