Prevalence of overlap of antineutrophil cytoplasmic antibody associated vasculitis with systemic autoimmune diseases: an unrecognized example of poliautoimmunity

Clinical Rheumatology - We aimed to estimate the frequency of overlap of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) with systemic autoimmune diseases. Retrospective...     

浅低温心脏不停搏心内手术对心肌保护效果的比较

目的:探讨浅低温体外循环(CPB)心脏搏动中心内直视手术对心肌保护的效果.方法:40例患者随机分为观察组(浅低温心不停搏组)和对照组(中低温心停搏组).分别在术前、转机、停机及术后6 h、12 h、24 h、48 h、72 h,取冠状静脉窦或中心静脉血样,测定血气分析及血清中肌酸磷酸激酶(CK)及其同功酶(CK-MB)、天门冬氨酸氨基转换酶(AST)、乳酸脱氢酶(LDH)、丙二醛(MDA)、超氧化物歧化酶(SOD)的含量.并取心房间隔肌观察心肌含水量及心肌超微结构的改变.临床观察CPB时间、脱机、呼吸支持、多巴胺应用、严重心律失常和血红蛋白尿等指标.结果:冠脉循环血气、电解质、酸碱水平与体循环的组内组间对比基本一致.CK、CK-MB、AST、LDH两组在CPB和术后均有增加,且以对照组升高显著,与观察组相同时点相比,差异均有显著性(P＜0.01).对照组术后MDA明显升高,SOD明显降低(P＜0.01),而观察组变化不大.心肌含水量和超微结构观察,对照组变化显著,而观察组轻微改变.临床指标观察,观察组优于对照组.结论:浅低温体外循环心脏不停搏心内直视手术对心肌损伤很轻,有很好的心肌保护效果.     

B细胞淋巴瘤TIL-T的IL-2Rα基因突变及蛋白表达检测

目的 :检测B细胞淋巴瘤 (B NHL)中肿瘤浸润T细胞 (TIL T)的活化标记IL 2Rα(CD2 5 )的基因及蛋白表达 ,寻找TIL T在B NHL肿瘤微环境中存在意义的实验依据。方法 :将 19例B NHL提取RNA ,采用RT PCR和SSCP检测其IL 2Rα的Ⅳ Ⅷ外显子基因突变与否 ;19例B NHL采用细胞免疫化学染色进行CD3、CD4、CD8、CD2 0、CD2 5细胞免疫表型的分析 ;2 9例B NHL和 2 0例良性淋巴组织 ,采用冰冻切片免疫组化方法进行IL 2Rα(CD2 5 )蛋白表达的检测。结果 :SSCP显示 19例TIL -T的IL 2Rα未发现异常泳动条带。细胞免疫化学染色示B NHL中 5 2 .6 3% (10 /19例 )的CD2 5 +细胞少于 10 % ,TIL T(CD3+)与CD4相关 (r =0 .5 7,P <0 .0 1)并与CD2 5相关 (r =0 .5 0 ,P <0 .0 5 )。免疫组化示 86 .2 % (2 5 /2 9例 )的B NHL中CD2 5表达 (+/- )和 (+) ,且主要表达在TIL T细胞上 ,呈散在分布 ,阳性细胞少于T标记细胞。结论 :19例TIL T的IL 2Rα在RNA水平未发现基因异常 ;CD2 5蛋白在B NHL中呈弱表达趋势。提示部分TIL T不表达CD2 5 ,推测TIL T的IL 2Rα的表达在转录后机制中可能出现异常或TIL T存在活化障碍。     

Involvement of ADAM10 in axonal outgrowth and myelination of the peripheral nerve

The disintegrin and metalloproteinase 10 (ADAM10) is a membrane‐anchored metalloproteinase with both proteolytic and disintegrin characteristics. Here, we investigate the expression, regulation, and functional role of ADAM10 in axonal outgrowth and myelination of the peripheral nerve. Expression pattern analysis of 11 ADAM family members in co‐cultures of rat dorsal root ganglia (DRG) neurons and Schwann cells (SCs) demonstrated the most pronounced mRNA expression for ADAM10. In further studies, ADAM10 was found to be consistently upregulated in DRG‐SC co‐cultures before the induction of myelination. Neurons as well as SCs widely expressed ADAM10 at the protein level. In neurons, the expression of ADAM10 was exclusively limited to the axons before the induction of myelination. Inhibition of ADAM10 activity by the hydroxamate‐based inhibitors GI254023X and GW280264X resulted in a significant decrease in the mean axonal length. These data suggest that ADAM10 represents a prerequisite for myelination, although its activity is not required during the process of myelination itself as demonstrated by expression analysis of myelin protein zero (P0) and Sudan black staining. Hence, during the process of myelin formation, ADAM10 is highly upregulated and appears to be critically involved in axonal outgrowth that is a requirement for myelination in the peripheral nerve. © 2009 Wiley‐Liss, Inc.     

石刻雕塑作业劳动卫生学调查及实验研究

测定了石雕作业粉尘浓度，几何平均浓度为８２．３５～３．６７ｍｇ／ｍ３。工人职业性健康检查结果，接尘工人的咽部充血、咳嗽、咯痰检出率高于对照组；肺功能低下的检出率也高于对照组。该厂自１９７２年以来发生尘肺患者１７例，其病情发展和晋期缓慢，发病工龄长。动物实验研究表明，石雕粉尘有轻微的致纤维化作用。     

女性压力性尿失禁的微创治疗

目的探讨女性压力性尿失禁的发病机制和微创治疗方法。方法女性压力性尿失禁患者25例,经临床、尿动力学检查或膀胱尿道造影确诊,均为稳定性膀胱,无膀胱出口梗阻。采用无张力阴道吊带术(TVT),将吊带无张力置于尿道中段。结果手术时间平均(40±5)min;术中出血量平均(43±10)mL;术后平均留置导尿1.5 d;术后平均住院3 d。23例患者术后尿失禁症状均消失,其中2例患者术后出现尿潴留,留置导尿1周后好转,尿潴留症状消失,尿失禁未复发;2例尿失禁症状显著改善。结论TVT等微创术式因简单、微创、疗效好、并发症少等,目前是女性压力性尿失禁外科手术治疗的发展方向。     

Reduced 293T cell susceptibility to acrolein due to aldose reductase-like-1 protein expression.

Acrolein is a highly reactive alpha,beta-unsaturated aldehyde produced endogenously during lipid peroxidation and naturally distributed pervasively in living environments, posing serious threats to human health if not properly metabolized. In this study, we report aldose reductase-like-1 (ARL-1) as a novel enzyme that catalyzes the reduction of acrolein and protects cells from their toxicity. Using purified ARL-1 protein, we determined its enzymatic activity in response to acrolein and defined its steady-state kinetics with K(m) and V(max) at 0.110 +/- 0.012 mM and 3122.0 +/- 64.7 nmol/mg protein/min, respectively. By introducing a functional Enhanced Green Fluorescent Protein (EGFP)/ARL-1 fusion protein into 293T cells, we demonstrated that plating efficiency in liquid culture and focus formation in soft agar increased by more than 60% (p < 0.05), compared to the vector control cells. More significantly, at a low dose of 5 microM acrolein, EGFP/ARL-1 expression enhanced both plating efficiency and focus formation by more than threefold, and the foci (in soft agar) of 293T cells expressing EGFP/ARL-1 were significantly larger than those of the vector control cells. At high concentrations of acrolein (25 and 50 microM), EGFP/ARL-1 protein prevented oncotic death of 293T cells induced by acrolein. In summary, our data demonstrated for the first time that the ARL-1 protein protects 293T cells from acrolein toxicity. Due to the high toxicity and wide distribution of acrolein, this finding is important to the understanding of its detoxification mechanisms.     

电视胸腔镜心血管外科手术150例

目的 总结、分析150例电视胸腔镜心血管外科手术的临床结果。方法 应用电视胸腔镜手术技术对动脉导管未闭、房间隔缺损、室间隔缺损、三尖辨关闭不全、冠状动脉-肺动脉瘘、心包积液、原发性长Q-T综合征、雷诺病，心包囊肿等进行治疗。结果 动脉导管未闭均成功在胸腔镜下钳闭；房缺、室缺在胸腔镜体外循环下进行补片修补，冠状动脉瘘胸腔镜下修补；心包积液进行心包活检与开窗引流；长Q-T综合征进行胸腔镜下左T2、T3胸交感神经节切除，均无严重并发症，术后患者恢复良好。结论 电视胸腔镜心血管外科手术可取得满意的临床治疗结果。