紫外分光光度法测定芸香甙-PVP共沉物含量

采用紫外分光光度法测定芸香甙－ＰＶＰ共沉物的含量。测定波长为２５６ｎｍ，测定液浓度在３μｇ／ｍｌ～１８μｇ／ｍｌ范围内，浓度（Ｃ）与吸收度（Ａ）呈良好的线性关系，ｒ＝０．９９８３，平均回收率为９９．８３％，ＲＳＤ＝０．１７％（ｎ＝６）。该法简便，样液稳定，赋形剂对测定无干扰     

日本血吸虫多价分子疫苗的制备及其抗原性的研究

为了制备足量、高纯度的供血吸虫保护性免疫力研究的多价分子疫苗。通过制备型ＳＤＳ－ＰＡＧＥ和电渗方法从日本血吸虫成虫分离纯化出２８ＫＤ，３１／３２ＫＤ及９７ＫＤ蛋白。经ＢＣＡ法检测蛋白含量，ＳＤＳ－ＰＡＧＥ检测蛋白纯度和分子量，Ｗｅｓｔｅｒｎ－ｂｌｏｔ及ＥＬＩＳＡ检测其抗原活性。结果日本血吸虫成虫２８ＫＤ，３１／３２ＫＤ及９７ＫＤ三种纯化蛋白经ＳＤＳ－ＰＡＧＥ检测均为单一条带并与所分离的蛋白分子量相符；其蛋白含量分别为０．３５ｍｇ／ｍｌ，０．４ｍｇ／ｍｌ和０．３ｍｇ／ｍｌ；Ｗｅｓｔｅｒｎ－ｂｌｏｔ均为单一反应区带；ＥＬＩＳＡ反应滴度分别为１∶６４０、１∶１２８０和１∶３２０。结果说明，由制备型ＳＤＳ－ＰＡＧＥ和电渗析方法制备的日本血吸虫成虫２８ＫＤ，３１／３２ＫＤ及９７ＫＤ蛋白多价分子疫苗，具有纯度高、制备快、回收率高等优点，且不影响所纯化的抗原活性     

可溶性白介素—2受体在肾移植病人中的意义

用多抗－单抗夹心ＥＬＩＳＡ检测了４２例肾移植病３人手术前后血清可溶性白介素－２受体（ＳＩＬ－２４）水平，并监测了术后病人血清ＳＩＬ－２４、ＢＵＮ、Ｃｒ的动态变化。结果显示，术前血清ｓＩＬ－２４继续下降至２７２．６３±２４３．３５Ｕ／ｍｌ，术后第３ｄ下降为３４０．２１±２０５．３５Ｕ／ｍｌ，术后肾功能稳定恢复ＳＩＬ－２Ｒ下降至２７２．６３±２００．５３Ｕ／ｍｌ，而肾功能恢复不良，血清ＳＩＬ－２Ｒ     

人血清载脂蛋白A_（－Ⅰ）放射免疫分析

从人血清中提纯载脂蛋白Ａ－Ⅰ（ａｐｏＡ－Ⅰ），制备抗ａｐｏＡ－Ⅰ抗血清，采用氯胺Ｔ法制备１２５Ｉ－ａｐｏＡ－Ⅰ，以平衡法建立ａｐｏＡ－ⅠＲＩＡ．灵敏度为５１μｇ／Ｌ，检测范围０．１～１２．８ｍｇ／Ｌ，批内ＣＶ６．２％，批间ＣＶ７．０％，效应误差关系０．０１９，回收率均值为９８．９％，与人血清低密度脂蛋白交叉反应率小于０．０９５％．９９例正常男、女性血清ａｐｏＡ－Ⅰ浓度分别为１．４５±０．１８ｇ／Ｌ（±ｓ）和１．４２±０．１９ｇ／Ｌ，无明显性别差异（Ｐ＞０．０５）．     

阳江高本底地区居民中免疫水平与对病毒免疫反应的研究

探讨在天然高本底电离辐射作用下机体的免疫水平与对病毒的免疫反应。方法利用单克隆抗体ＡＰＡＡＰ法检测白细胞介素－２分泌细胞（ＩＬ－２ＳＣ）；利用间接免疫酶法检测抗ＥＢ病毒抗原抗体水平（ＶＣＡ／ＩｇＡ，ＶＣＡ／ＩｇＧ，ＥＡ／ＩｇＡ，ＥＡ／ＩｇＧ）；采用酶标免疫吸附沉淀法检测乙型肝炎（ＨＢＶ）表面抗原（ＨＢｓＡｇ），表面抗原抗体（ＨＢｓＡｂ）和核心抗体（ＨＢｃＡｂ）。结果高本底地区（ＨＢＲＡ）居民外周血淋巴细胞ＩＬ－２ＳＣ频数显著高于对照（ＣＡ）；ＶＣＡ／ＩｇＡ、ＶＣＡ／ＩｇＧ、ＥＡ／ＩｇＧ抗体水平均高于ＣＡ，但仅ＶＣＡ／ＩｇＧ抗体滴度水平存在差异显著性，两地区ＶＣＡ／ＩｇＡ≥１５阳性检出率均显著高于广东地区的平均水平；ＨＢＶ感染率与ＨＢｓＡｂ阳性率为ＨＢＲＡ高于ＣＡ（Ｐ＞０．０５）。结论提示长期低水平电离辐射作用机体免疫功能有增强的趋势。     

人血清载脂蛋白A—I放射免疫分析

从人血清中提纯载脂蛋白Ａ－Ｉ（ａｐｏＡ－Ｉ），制备抗ａｐｏＡ－Ｉ抗血清，采用氯胺Ｔ法制备＾１２５Ｉ－ａｐｏＡ－Ｉ，以平衡法建立ａｐｏＡ－ＩＲＩＡ。灵敏度为５１μｇ／Ｌ，检测范围０．１￣１２．８ｍｇ／Ｌ，批内ＣＶ６．２％，批间ＣＶ７．０，效应误差关系０．０１９，回收率均值为９８．９％，与人血清低密度脂蛋白交叉反应率小于０．０９５％。９９例正常男、女性血清ａｐｏＡ－Ｉ浓度分别为１．４５±０．１８ｇ／Ｌ     

G-CSF减轻大鼠下肢缺血再灌注致肺功能损伤的实验研究

目的：研究重组粒细胞集落刺激因子（Ｇ－ＣＳＦ）对大鼠下肢缺血再灌注所致肺功能损伤的治疗作用。方法：雄性ＳＤ大鼠随机分３组,手术组及给药组麻醉后开腹解剖口主动脉．在肾动脉水平远端阻断１２０ｍｉｎ,开放、再灌注 １２０ ｍｉｎ;假手术组不阻断腹主动脉,余同手术组。３组均于术前经舌静脉注入伊文氏蓝（Ｅｖａｎ’ｓ ｂｌｕｅ ｄｇｅ） ３０ ｍｇ／ｋｇ;给药组术前经尾赢脉注入Ｇ－ＣＳＦ ２０μｇ／ｋｇ．余二组给予生理盐水１ｍｌ。术后取肺组织测定丙二醛（ｍａｌｏｎｒｌｄｉａｄｅｈｙｄｅ,ＭＤＡ）及伊文氏蓝含量。结果：给药组ＭＤＡ含量为（１．７１±０．３４）ｎｍｏｌ／ｍｇ,假手术组为（ｌ．７３±０．６５）ｎｍｏｌ／ｍｇ,均显著低于手术组〔（２．５４±０．３９）ｎｍｏｌ／ｍｇ］。 给药组伊文氏蓝含量为（１．５０±０．２９）μｇ／ｍｇ．假手术组为（０．１３±０．０７）μｇ／ｍｇ,均显著低于手术组［（（３．０７±１．１８）μｇ／ｍｇ］．结论：Ｇ－ＣＳＦ有减轻大鼠下肢缺血再灌注所致肺功能损伤的作用。     

脂多糖刺激肺血管内巨噬细胞环氧合酶-2表达的意义

探讨脂多糖（ＬＰＳ）对肺血管内巨噬细胞（ＰＩＭ）环氧合酶－２（ＣＯＸ－２）的作用及意义。方法改良法分离、培养猪ＰＩＭ，以ＬＰＳ（１０μｇ／ｍｌ）刺激，反转录滞麦链反应（ＲＴ－ＰＣＲ）检测ＣＯＸ－２ｍＲＮＡ的变化；经染色法观察ＣＯＸ－２酶蛋白的改变；放射免疫分析法（ＲＩＡ）测定前列腺素Ｅ２）（ＰＧＥ２）变化，以间接显示ＣＯＸ活性的改变。结果ＬＰＳ刺激后，ＰＩＭ ＣＯＸ－２ｍＲＮＡ和酶蛋白表达ＰＧＥ２     

哮喘患者血清癌胚抗原的变化及其临床意义

用放免法检测了５３例哮喘患者血清癌胚抗原（ＣＥＡ）水平。结果，哮喘发作期组（９．９１±３．５４ｎｇ／ｍｌ）显著高于缓解期组（７．２９±２．７６ｎｇ／ｍｌ）和正常组（５．１７±２．４３ｎｇ／ｍｌ）。哮喘发作的严重程度与血清ＣＥＡ水平相平行。哮喘发作期血清ＣＥＡ水平与外周血嗜酸细胞计数间存在显著正相关（ｒ＝０．５５７０，Ｐ＜０．０１）。提示血清ＣＥＡ水平在一定程度上可以反映哮喘病情变化和发作程度，并可作为气道炎症的监测指标     

HIV—1多表位膜蛋白在E.coli中的表达及在血清检测中的应用

目的：获得具有较多保守抗原表位的ＨＩＶ－１膜重组抗原，提高ＨＩＶ筛选ＥＬＩＳＡ试剂的质量。方法：利用分子克隆与ＰＣＲ方法，获得了新的ＨＩＶ－１膜重组抗原的基因克隆，编码ｇｐ１２０Ｃ端亲水区３７个氨基酸残基（ｅｎｖ４８２～５１８）以及ｇｐ４１膜外部分的１２８个氨基酸残基（ｅｎｖ５４８～６７５）。将该基因克隆到ｐＧＥＭＥＸ－１载体上融合表达，表达蛋白经纯化后，以１μｇ／ｍｌ的浓度包被ＥＬＩＳＡ板，用来     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.     

Diagnóstico ecográfico del neumotórax

The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.     

Carbohydrate Supplementation during Exercise: Does It Help? How Much is Too Much?

KEY POINTS· Carbohydrate intake during exercise can delay the onset of fatigue and improve performance of prolonged exercise as well as exercise of shorter duration and greater intensity (e.g., continuous exercise lasting about 1h and intermittent high-intensity exercise), but the mechanisms by which performance is improved are different.     

Do Balance Board Training Programs Reduce the Risk of Ankle Sprains in Athletes?

Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).     

磁共振DWI和动态增强鉴别颅底脊索瘤和侵袭性垂体瘤的应用

目的 探讨磁共振扩散加权成像(DWI)和动态增强在颅底脊索瘤和侵袭性垂体瘤(IPA)鉴别诊断中的应用价值.方法 搜集经手术病理证实且影像学有鞍区破坏的颅底脊索瘤患者15例、向鼻咽部侵犯的IPA患者20例.测量二者的表观扩散系数(ADC)值,绘制受试者工作特征曲线(ROC),分析动态增强曲线的类型,统计达峰时间(TTP)、增强峰值(EP)和最大对比增强率(MCER),分析各个参数在鉴别诊断中的价值.结果 颅底脊索瘤的ADC值为(1.274±0.07)×10-3mm2/s,高于IPA ADC值(0.672±0.03) ×10-3 mm2/s(P ＜0.001),ADC阈值为0.964×10-3mm2/s时,ROC曲线下面积为0.997,敏感度为93.3％,特异度为100％.颅底脊索瘤时间-信号强度曲线(TIC)Ⅰ型14例,TICⅢ型1例,此例TICⅢ型者TTP约40 s;IPA TIC Ⅰ型7例,TICⅢ型13例.颅底脊索瘤和IPA的EP、MCER差异均有统计学意义(P ＜0.001).结论 ADC值和TIC的类型及其相关参数(EP,MCER)有助于颅底脊索瘤和IPA之间的鉴别.     

Treatment of intrahepatic arteriovenous fistula in hepatocellular carcinoma with N-butyl-2-cyanoacrylate

Primary hepatocellular carcinoma (HCC) continues to be one of the most common malignancies with an incidence of approximately one million cases per year and a dismal prognosis; some authors have reported a median survival of 1 ～ 2 months after diagnosis. Although surgery remains the only hope for cure, few patients are candidates[1,2].     

U50,488H对正常及缺氧心肌细胞L型钙电流的作用

目的 探讨心脏阿片受体和β-受体相互作用的机制。方法 采用全细胞膜片钳技术,观察U50,488H(β-阿片受体选择性激动剂)对正常和缺氧心肌细胞L型钙电流的作用。结果 U50,488H剂量依赖性(0．1～100μmol／L)抑制正常心肌细胞的L型钙电流及异丙肾上腺素(0．1μmol／L)激动的钙电流,而细胞缺氧后,这一抑制作用减弱;U50,488H对Forskolin(10μmol／L)激动的L型钙电流无明显影响。结论 β-阿片受体对β-受体信号的负性调节作用在细胞缺氧后减弱,其作用位点可能发生于β-受体与腺苷酸环化酶环节之间。