Partial splenic embolization for hypersplenism concomitant with or after arterial embolization of hepatocellular carcinoma in 30 patients

Purpose To study the value of partial splenic embolization (PSE) for the treatment of hypersplenism in patients undergoing embolization of hepatocellular carcinoma (HCC). Methods Transcatheter hepatic arterial embolization (THAE) combined with PSE was performed in 30 patients with HCC complicating liver cirrhosis, portal hypertension, and hypersplenism. Gelfoam sponge was used as the embolic material for PSE and limited to 100–150 pieces. Results More than 50% of splenic parenchyma was infarcted in 27 patients. Leukopenia and thrombocytopenia were corrected by PSE in 25 of 27 patients with hypersplenism. In 26 patients with esophageal varices, including 5 patients with bleeding, no rebleeding occurred during a 6–17 month follow-up. Hypersplenism was not corrected in 2 of 3 patients whose infarcted splenic parenchyma was less than 50%. No splenic abscesses or other severe complications were observed. Of the 30 patients treated, 19 are still alive after 1 year. Conclusions THAE combined with PSE is a safe and effective measure for patients with HCC.     

ATP片剂的UV—HPLC测定

采用ＵＶ－ＨＰＬＣ法测定ＡＴＰ片剂的含量，较地方标准收载的方法方便易行，重现性好。测定的回收率为１００．８±１．５％。     

麻尘对肺泡巨噬细胞影响的体外研究

作者选择黄麻、苎麻、亚麻，采用细胞培养技术，探讨了麻尘对肺泡巨噬细胞（ＡＭ）的影响。结果表明，所用麻尘对ＡＭ均有不同程度的毒作用，导致ＡＭ存活率降低，培养液中乳酸脱氢酶、酸性磷酸酶活性上升，ＡＭ形态出现损伤性变化，但作用强度低于同浓度的石英、石棉。同时，麻尘也导致ＡＭ功能的改变，培养液中免疫球蛋白Ｇ、免疫复合物、组织胺含量增加。比较３种麻尘，其中以苎麻毒性及刺激ＡＭ分泌生物介质的能力最弱。     

冠心病患者心电图ST段水平与IL-6和脂蛋白(a)水平的关系

目的 研究冠心病患者心肌缺血情况下循环中白细胞介素-6(IL-6)和脂蛋白(a)[LP(a)]水平的关系和临床意义。方法 用ELISA分析试剂盒检测62例冠心病患者和50例健康对照者血浆IL-6，用免疫透射比浊法检测血滑LP(a)，并对心电图(EKG)ST段的情况进行比较。结果 冠心病组血浆IL-6和血清LP(a)水平均较健康对照组显著增高(P＜0．01)。与健康对照组相比，ST段异常组和ST段正常组血浆IL-6水平均显著增高(P＜0．01)；ST段异常组血浆LP(a)水平显著增高(P＜0．01)，ST段正常组血清LP(a)水平有所增高，但无统计学意义(P＞0．05)。ST段异常组血浆IL-6和血清LP(a)水平均显著高于ST段正常组(P＜0．05，P＜0．01)。冠心病患者血浆IL-6和血滑LP(a)水平存在显著的相关性(P＜0．05)。结论 冠心病患者循环中IL-6和LP(a)水平显著升高，高水平IL-6和LP(a)可能反映血管和心肌损伤的发生，LP(a)的增加可能与IL-6刺激肝脏合成LP(a)增加有关。     

血管内皮生长因子受体启动子驱动重组腺病毒双自杀基因系统选择性杀伤大肠癌细胞

OBJECTIVE: To observe the selective killing effect of adenovirus (Ad)-mediated double suicide gene driven by kinase domain-containing receptor(KDR) promoter on human colorectal cancer LoVo cells and human umbilical vein endothelial ECV304 cells. METHODS: The plasmid pAdEasy-KDR-CDglyTK was transfected into 293 packaging cells for amplification of the infectious Ad and used to infect the KDR-producing cells (ECV304 and LoVo) and the KDR-nonproducing cells (LS174T) respectively. The three cells were treated with the prodrugs 5-flurocytosine (5-FC) and ganciclovir (GCV) at different concentrations after infection. The killing effects of the fusion gene system on the cells were evaluated. The distribution of cell cycle was detected by flow cytometry. RESULTS: The infection rates of the recombinant Ad were similar among the 3 cells, gradually increasing with the increment of multiplicity of infection (MOI) and reaching 100% with the MOI of 200. The LoVo cells and ECV304 cells infected with Ad-KDR-CDglyTK were highly sensitive to both of the prodrugs (P>0.1), whereas the infected LS174T cells failed to exhibit similar sensitivity (P<0.001). The killing effect of CD/TK fusion gene on the target cells was much stronger than that of either suicide gene (P<0.001). The cell cycle of LoVo cells was arrested at G1 phase. CONCLUSION: The CD/TK fusion gene system driven by KDR promoter can selectively kill KDR-expressing human colorectal cancer LoVo cells and endothelial cells.     

Small interfering RNA inhibits SARS-CoV nucleocapsid gene expression in cultured cells and mouse muscles

SARS-CoV isa newly identified coronavirus that causes severe acute respiratory syndrome （SARS）. Currently, there is no effective method available for prophylaxis and treatment of SARS-CoVinfections. In the present study, the influence of small interfering RNA （siRNA） on SARS-CoV nucleocapsid （N） protein expression was detected in cultured cells and mouse muscles. Four siRNA expression cassettes driven by mouse U6 promoter targeting SARS-CoV N gene were prepared, and their inhibitory effects on expression of N and enhanced green fluorescence protein （EGFP） fusion protein were observed.     

Cr:LiSAF激光在组织自体荧光光谱研究中的应用

目的　该文以Cr:liSAF激光作为激发光源 ,针对生物大分子设计了荧光实验 ,以探讨其在组织自体荧光研究中的应用。方法　氙灯泵浦Cr:LiSAF二次谐波用来产生可调谐蓝光脉冲激光输出 ,并设计了自体荧光试验。结果　最后设计并实现了可调谐蓝光脉冲激光输出 ,得到了良好的输出特性。结论　氙灯泵浦Cr:LiSAF二次谐波产生可调谐蓝光脉冲激光输出得到了良好的输出特性 ,该实验为进一步研究肿瘤组织与正常组织自体荧光产生机制打下了基础。     

原代培养神经细胞膜经N—甲基—D—D天冬氨酸和MK—801作用后原子力微镜观察

目的：对比观察正常培养皮层神经元在N－甲基－D－天冬氨酸（NMDA）及其受体拮抗剂－MK－801作用下膜表面三维构像形态的改变。方法：利用分辨率为0．1－0．01nm的原子力显微镜（AFM）对原代培养大鼠皮层神经细胞膜表面进行纳米尺度的扫描观测。结果：正常神经元膜表面光滑，起伏均匀，隆起的颗粒状蛋白密集，间隔规律。NMDA损伤后神经元破碎，崩解，膜失去连续性，NMDA＋MK－801作用下神经元膜皱折增加，边缘粗糙，起伏程度介于前两者之间，结论：（1）AFM具有分辨率高，制样简单特点，（2）AFM能细微地分辨损伤保护作用后引起的细胞膜表面三维形态改变。（3）NMDA作用后膜结构开始解体，膜蛋白颗粒聚集增大，脂质凹陷加深，间距增宽，表面粗糙度增加。     

正常血钾型周期性麻痹SCN4A基因新突变的检测

目的　报道正常血钾型周期性麻痹 (normoPP)一家系的临床特点 ,并筛查SCN4A基因以期发现有义突变。方法　提取知情同意的患者及部分家属外周血基因组DNA ,应用变性高效液相色谱分析 (DHPLC)技术筛查患者SCN4A基因全部 2 4个外显子 ,对发现异常者进行测序分析。结果先证者常规实验室检查未见异常 ,发作期肌酸激酶 (CK) 112 6U/L(正常值 <2 0 0U/L) ,肌电图正常。发作间期行肌肉活检未见显著异常。基因研究发现先证者及其父亲 (患者 )SCN4A基因发生同一新突变G2 10 1A ,并引起氨基酸序列改变Arg6 75Gln。该突变不同于目前发现的明确导致高钾型周期性麻痹(hyperPP)的突变 ,也不同于已知的SCN4A基因所有突变。结论　normoPP患者存在一新突变Arg6 75Gln ,该突变可能与疾病相关。     

抑肽酶对瓣膜置换术患者心肌粘附分子表达及细胞凋亡的影响

目的探讨抑肽酶对二尖瓣置换术患者围体外循环（CPB）期心肌细胞及心肌血管内皮细胞上细胞间粘附分子-1（ICAM-1）、血管细胞粘附分子-1（VCAM-1）表达及心肌细胞凋亡的影响。方法择期二尖瓣置换术患者30例,年龄24～59岁,体重46～73 kg,心功能分级Ⅱ级或Ⅲ级,随机分为2组（n=15）：对照组和抑肽酶组,抑肽酶组于CPB转机前,预充液中加入抑肽酶300万KIU,对照组则给予等容量生理盐水,分别于CPB前和CPB停止时取右心房心肌组织标本,采用免疫组织化学SP法染色,检测心肌细胞和心肌血管内皮细胞上ICAM-1、VCAM-1的表达,采用病理图像分析系统对ICAM-1、VCAM-1表达的灰度值作定量分析,采用TUNEL法检测凋亡心肌细胞。结果抑肽酶组CPB停止时ICAM-1、VCAM-1的表达低于对照组（P〈0.01）;2组CPB停止时心肌细胞凋亡指数较CPB前增高（P〈0.05）,抑肽酶组CPB停止时心肌细胞凋亡指数低于对照组（P〈0.05）。结论预充液中加入抑肽酶300万KIU可抑制二尖瓣置换术患者CPB期间心肌细胞和心肌血管内皮细胞ICAM-1、VCAM-1的表达及心肌细胞的凋亡。