不同透析方式对晚期糖基化终末产物清除作用的研究

目的 通过不同透析方式对晚期糖基化终末产物(AGEs)清除作用进行比较,探讨能更好清除中分子毒素的透析方式,指导临床治疗.方法 20例尿毒症患者,接受血液透析滤过(HDF)联合高通量透析(HFHD)10例,接受常规血液透析(CHD)治疗10例,用荧光分光光度计法对透析患者血清AGE8水平进行测定(治疗6个月前后以及单次HDF、HFHD、CHD治疗前后),并对其进行比较分析.结果 单次HDF、HFHD治疗血清AGEs水平均明显下降(P<0.05),但2组间差异无统计学意叉(P>0.05),单次CHD治疗血清AGEs水平差异无统计学意义(P>0.05);治疗后6个月透析前AGEs水平各组差异均无统计学意义(P>0.05).但HDF HFHD组HDF低于CHD组(P<0.05).结论 HDF、HFHD治疗是清除尿毒症患者体内AGEs的一条重要途径;长期联合HFHD对AGEs清除作用明显优于CHD治疗.     

肾癌中EphA2/EphrinA1和E-cadherin的表达及其意义

目的：探讨EphA2/EphrinA1和E—cadherin在肾癌组织中的表达及与肾癌临床病理特征的关系．方法：利用免疫组织化学法检测68例肾癌组织、24例正常肾组织中EphA2、EphrinA1和E—cadherin的表达；并采用流式细胞术对上述三种蛋白进行定量分析，采用SPSS13．0进行统计学处理。结果：肾癌组织中EphA2、EphrinA1的表达明显高于正常肾组织（P〈0．01）；E-cadhetin的表达明显低于正常肾组织（P〈0．01）。在肾癌组织中，肿瘤高分级组EphA2、EphrinA1蛋白的表达水平（IHC、FCM）显著高于低分级组（P〈0．01，P〈0．05），而E—eadherin蛋白的表达（IHC）显著低于低分级组（P〈0．01）；肿瘤高分期组EphA2、EphrinA1蛋白的表达水平（IHC、FCM）显著高于低分期组（P〈0．01，P〈0．05），而E—cadherin蛋白的表达（IHC）显著低于低分期组（P〈0．01），淋巴结转移组EphA2、EphrinA1蛋白的表达（IHC、FCM）显著高于无淋巴结转移组（P〈0．05）。而E—cadherin蛋白的表达（IHC）显著低于无淋巴结转移组（P〈0．05）。免疫组织化学显示EphA2与E-cadherin蛋白的表达呈显著负相关（r=-0．483，P〈0．01），EphrinA1与E-cadherin蛋白的表达呈显著负相关（E-0．414，P〈0．01）．EphA2与EphrinA1蛋白的表达呈显著正相关（r=-0．906，P〈0．01）。结论：EphA2／EphrinA1与E—cadherin蛋白表达异常可能共同参与了肾癌的发生、发展与转移；联合检测三种蛋白对于评价肾癌的恶性程度、判断其转移潜能具有一定的参考价值。     

Acupuncture Treatment of Palpitation

CASE HISTORY
A female patient, a translator in a Beijing translation company, aged 33 years, paid her first visit on March 10, 2006, with the chief complaint of palpitation for 3 days. The patient stated that 3 days before, she received uterine curettage for artificial abortion, when she got nervous tension. After the operation, she felt dizziness and palpitation, and precordial discomfort, which was diagnosed as paroxysmal tachycardia. She was treated right away by pressing the carotid sinus and the eyeball, but with no effects. Then, she came to us for treatment. The patient used to have a weak body constitution, and was very sensitive. She would have palpitation upon sudden events, which would disappear quickly after she calmed down. Her sleep was sometimes good and sometimes bad, appetite ok, and feces and urine normal.     

美国脂质协会他汀药物肝脏安全性评估简介

最近．美国国家脂质协会（National Lipid Association, NLA）邀请致力于非酒精性脂肪性肝病（nonalcoholic fatty liver disease, NAFLD）,脂质代谢紊乱和药物性肝损害研究方面的肝脏病学专家加盟他汀安全性工作组．旨在对他汀肝脏安全性问题进行一次全面的、严格的、学术的、最新的以及无偏见的评估。本文主要介绍NLA与肝病专家委员之间的对话。     

新疆紫草颗粒剂与汤剂对药物流产效果影响的比较性研究

目的:比较新疆紫草颗粒剂与紫草汤剂对米非司酮配伍米索前列醇药物流产效果的影响,及不良反应。方法:将648例妊娠38-45　d、要求终止妊娠的妇女,随机分成3组,各组在米非司酮配伍米索前列醇药物流产时分别加服紫草颗粒剂或安慰剂或紫草汤剂,对3组的流产效果、出血时间、月经恢复时间等及不良反应进行观察。结果:紫草颗粒剂组和汤剂组的完全流产率(97.74%、97.70%)、平均出血时间(12.0±4.1　d、12.7±3.8　d)均无显著性差异(P均>0.05),且均显著优于安慰剂组(91.90%、14.3±4.8　d)(P均<0.05)。3组药物流产后月经恢复时间均无显著性差异。但紫草汤剂服用时有明显异味。结论:　紫草颗粒剂祛除了紫草的异味,服用方便,对其提高药物流产疗效与紫草汤剂相同,有必要进一步探讨。     

DNA repair pathway profiling and microsatellite instability in colorectal cancer.

BACKGROUND: The ability to maintain DNA integrity is a critical cellular function. DNA repair is conducted by distinct pathways of genes, many of which are thought to be altered in colorectal cancer. However, there has been little characterization of these pathways in colorectal cancer. METHOD: By using the TaqMan real-time quantitative PCR, RNA expression profiling of 20 DNA repair pathway genes was done in matched tumor and normal tissues from 52 patients with Dukes' C colorectal cancer. RESULTS: The relative mRNA expression level across the 20 DNA repair pathway genes varied considerably, and the individual variability was also quite large, with an 85.4 median fold change in the tumor tissue genes and a 127.2 median fold change in the normal tissue genes. Tumor-normal differential expression was found in 13 of 20 DNA repair pathway genes (only XPA had a lower RNA level in the tumor samples; the other 12 genes had significantly higher tumor levels, all P<0.01). Coordinated expression of ERCC6, HMG1, MSH2, and POLB (RS>or=0.60) was observed in the tumor tissues (all P<0.001). Apoptosis index was not correlated with expression of the 20 DNA repair pathway genes. MLH1 and XRCC1 RNA expression was correlated with microsatellite instability status (P=0.045 and 0.020, respectively). An inverse correlation was found between tumor MLH1 RNA expression and MLH1 DNA methylation (P=0.003). CONCLUSION: Our study provides an initial characterization of the DNA repair pathways for understanding the cellular DNA damage/repair system in human colorectal cancer.     

Seizures in children with low-grade tumors： outcome after tumor resection and risk factors for uncontrolled seizures

OBJECT： The goals of this study were to define the incidence of seizures in children with low-grade tumors, study seizure outcome after lesionectomy in these children, and identify risk factors for poor seizure outcome, METHODS： The authors performed a retrospective chart review of children who harbored low-grade brain tumors, experienced seizures, and were treated in a single institution, Statistical analyses included step-wise as well as single-variable binary logistic regression analyses.     

清咽灵口服液的急性毒理及药效学实验研究

目的 观察清咽灵口服液的急性毒性反应、抗炎作用、化痰作用、抑菌作用及免疫作用。方法①取小鼠４０只，禁食１２小时，以最大浓度相当于人临床用量的８０００倍，观察给药后７日内动物一般状态、毛色、体重、饮食等指标的变化。②观察清咽灵口服液对棉球、琼脂引起大鼠慢性炎症及二甲苯所致小鼠耳肿胀的影响。③采用气管段酚红法观察了清咽灵口服液化痰作用。④采用试管法观察了清咽灵口服液的体外抑菌作用。⑤用清咽灵口服液对２·４－二硝基氟苯所致小白鼠迟发型超敏反应影响。结果 小白鼠灌胃给药，最大耐受量为３５６４０ｇ生药／ｋｇ，相当于人临床用量的８０００倍门临床成人６０ｋｇ，用量２６７．３ｇ生药／日），其给药后动物一般状态良好，毛色正常，体重增加，饮食及活动未见异常。未发现明显毒性反应。药效学实验结果提示，清咽灵口服液对棉球、琼脂所致的大鼠慢性炎症有明显抑制作用；对二甲苯所致小鼠耳壳肿胀有明显抑制作用，可增加小鼠气管对酚红排泌量；在体外对金黄色葡萄球菌、乙型溶血性链球菌、肺炎球菌、白喉杆菌均有不同程度的抑制作用；对二硝基氟苯所致小鼠迟发型超敏反应无明显影响。结论 中药清咽灵口服液无急性毒性作用，有显著抑菌、抗肉芽增生、化痰作用。     

On the Assessment Standardization for TCM Clinical Evidence

Nowadays,the evidence-based medicine has been widely used for assessment of TCM.The assessment based on clinical evidence and the quality is the core of evidence-based medicine.However,the evidencerating methods adopted in the modern medical system are only applicable in a certain degree to the assessment of TCM clinicaI evidence.     

内皮素在培养的肝癌细胞中的表达及其作用

 目的：确定人肝癌细胞合成释放内皮素（ET）与否；探讨外源性ET-1对培养的人肝癌细胞增殖的影响。方法：应用特异性放射免疫分析法测定肝癌细胞（HCC9204和SMMC7721）培养液中ET-1含量；采用3H-胸腺嘧啶核苷（3H－TdR）掺入和液体闪烁技术观察ET－1（10^－11～10^－7mol／L）对培养的加或不加表皮生长因子（EGF）的肝癌细胞增殖的影响。结果：培养的肝癌细胞HCC9204和SMMC7721均能分泌ET－1，并呈时间依赖性。培养24h为分泌高峰期，HCC9204和SMMC7721在有血清条件下ET-1浓度分别为86．38±7．7Pg／ml，76．32±8．4pg／ml，均显著高于各自无血清组（28．16±3．34pg／ml，23．22±4．72pg／ml）（P＜0．01）。ET－1单独作用对肝癌细胞DNA合成没有影响（P＜0．05）；在EGF（1nmol／L）存在时，ET－1在10^－11～10^－17mol／L时DNA合成增殖率为27．4％～86．6％（P＜0．05），且呈剂量依赖性（γ=0．7531，P＜0．05）。结论：人肝癌细胞可合成并分泌ET；ET－1单独作用对肝癌细胞DNA合成没有影响，但能明显增强EGF对肝癌细胞的增殖作用。