Gab1与SOD在胆管癌中的表达及意义

目的通过免疫组织化学方法检测Gab1与SOD在胆管癌组织、癌旁组织和正常胆管组织中的表达,探讨它们对胆管癌发生、发展的影响,揭示胆管癌的发病机制。方法收集中国医科大学附属盛京医院2006年1月~2010年5月胆管癌标本70例,30例癌旁胆管组织,30例正常组织。用免疫组织化学方法检测Gab1与SOD的表达情况,对三组切片染色进行光密度分析。应用SPSS 13.0统计软件进行分析。对两项指标的检测数据分别进行t检验及Spearman等级相关检验。结果胆管癌组Gab1平均光密度为(0.1689±0.0268);癌旁组为(0.1471±0.0185);正常组为(0.1023±0.0119)。胆管癌组的SOD的平均光密度为(0.2205±0.0245);癌旁组为(0.1971±0.039);正常组为(0.1749±0.0151)。Gab1与SOD蛋白在胆管癌组、癌旁组、正常组表达均呈递减趋势,具有显著性差异(P<0.05)。胆管癌组织中Gab1与SOD表达呈正相关。r=0.247,P<0.05。结论 Gab1与SOD蛋白与胆管癌的发生、发展有关。Gab1的含量与SOD的含量呈正相关。     

菊花总黄酮含药血清对干眼细胞模型AR、NF-κB磷酸化蛋白及TGF-β1表达的影响＊

目的 观察菊花总黄酮在体外条件下对泪腺上皮细胞中雄激素受体（Androgen Receptor，AR）的调控作用及对下游的核因子κB（Nuclear Factor kappa B，NF-κB）、转化生长因子-β1（transforming growth factor-beta1，TGF-β1）的表达影响。方法 以过氧化氢（H₂O₂）诱导泪腺上皮细胞凋亡，建立细胞模型，设立无雄激素培养空白对照组、含雄激素培养对照组、无雄激素培养黄酮治疗组。以MTT法摸索含药血清最佳干预加入量；免疫印迹实验（Western Blot）以及实时荧光定量PCR法（Quantitative Real-Time PCR，qPCR）检测泪腺上皮细胞中AR、NF-κB及TGF-β1的表达情况；并应用雄激素受体阻断剂氟他胺进行AR阻断后再次检测上述指标 。结果 MTT法检测后计算得出含药血清干预细胞的最终浓度为13.2%；无雄激素培养黄酮治疗组及含雄激素培养对照组中AR、NF-κB及TGF-β1的表达增强，与空白对照组对比有显著差异（P<0.01）；无雄激素培养黄酮治疗组中NF-κB表达量比含雄激素培养对照组表达量低，两者间的差异有统计学意义。氟他胺及含药血清干预后，无雄激素培养黄酮治疗组及含雄激素培养对照组中AR及NF-κB的表达未见提高，无统计学意义。结论 菊花总黄酮对泪腺上皮细胞可能存在拟雄激素效应，从而使AR、NF-κB表达增加，并通过上调TGF-β1的表达，可能起到在泪腺局部的抗炎作用。     

Clinicopathological and Immunohistochemical Study of Low-Grade Myofibroblastic Sarcoma of the Liver-One Case Report

Low-grade myofibroblastic sarcoma is a recently characterized tumor showing features of myofibroblastic differentiation that is part of the spectrum of malignant mesenchymal tumors.This extremely rare ...     

Gene Expression Profiling as an Initial Approach for Mechanistic Studies of Toxicity and Tumorigenicity of Herbal Plants and Herbal Dietary Supplements

Dietary supplements are consumed by more than 300 million people worldwide, and herbal dietary supplements represent the most rapidly growing portion of this industry. Even though adverse health effects of many herbal dietary supplements have been reported, safety assurances are not being addressed adequately. Toxicological data on the identification of genotoxic and tumorigenic ingredients in many raw herbs are also lacking. Currently, more than 30 herbal dietary supplements and active ingredients have been selected by the National Toxicology Program (NTP) for toxicity and tumorigenicity studies. Due to the complexity of the chemical components present in plant extracts, there are no established methodologies for determining the mechanisms of toxicity (particularly tumorigenicity) induced by herbs, such as Gingko biloba leaf extract (GBE) and other herbal plant extracts. Consequently, the understanding of toxicity of herbal dietary supplements remains limited.

We have proposed that application of DNA microarrays could be a highly practical initial approach for revealing biological pathways and networks associated with toxicity induced by herbal dietary supplements and the generation of hypotheses to address likely mechanisms. The changes in expression of subsets of genes of interest, such as the modulation of drug metabolizing genes, can be analyzed after treatment with an herbal dietary supplement. Although levels of gene expression do not represent fully the levels of protein activities, we propose that subsequent biochemical and genomic experiments based on these initial observations will enable elucidation of the mechanisms leading to toxicity, including tumorigenicity. This review summarizes the current practices of microarray analysis of gene expressions in animals treated with herbal dietary supplements and discusses perspectives for the proposed strategy.     

急性心源性肺水肿临床疗效与X线胸片的相关性分析

目的研究急性心源性肺水肿治疗效果和X线胸片表现之间的关系,为临床评估疗效提供帮助。方法由2名有经验的放射科医师采用盲法回顾性分析48例急性心源性肺水肿患者治疗前后的X线胸片好转率,所得的数据做χ2检验,并用Kappa检验对2人评判的结果做一致性分析。结果医师甲、乙所得的结论均为:急性心源性肺水肿临床治疗后好转者,X线胸片好转率的差异有统计学意义(P<0.05)。甲乙医师间阅片的一致性分析差异有统计学意义(P<0.05),说明甲乙2名医师对治疗前后X线表现好转与否的诊断结果有较好的一致性。讨论急性心源性肺水肿治疗过程中复查X线胸片,是评估临床疗效的一种有效的方法 。     

薯莨提取物体外抗人型支原体的作用

目的 从中药薯莨中提取具有体外抗人型支原体作用的成分,并测定其最小抑菌浓度,为开发薯莨提供依据.方法 采用超声提取法醇提,D101大孔树脂梯度洗脱的方法得到不同的洗脱流分,经固体培养法初筛具有体外抑制人型支原体作用的流分,再经液体-固体联合培养法测定其MIC范围和MIC50值.结果 薯莨正丁醇部位经D101大孔树脂梯度洗脱,其中25％乙醇洗脱流分具有较好的体外抑制人型支原体的作用,其MIC范围是(16/32～128) mg/mL,而MIC50为32 mg/mL.结论 薯莨具有抗人型支原体作用的开发和研究价值.     

阿立哌唑与小剂量氯氮平治疗难治性精神分裂症对照研究

目的探讨阿立哌唑合并小剂量氯氮平治疗难治性精神分裂症的疗效和安全性。方法将40例难治性精神分裂症患者随机分为A组(阿立哌唑合并小剂量氯氮平,n=20)和B组(单用氯氮平,n=20)。于治疗前和治疗第4、8、12周末采用阳性与阴性症状量表(PANSS)评定临床疗效;使用副反应量表(TESS)评定不良反应,并进行对比分析。结果 2组治疗后PANSS总分较治疗前明显降低,A组显著低于B组,差异有统计学意义。2组治疗12周末有效率分别是80%、50%,差异有统计学意义(χ2=3.95,P<0.05)。2组不良反应比较差异有统计学意义(P<0.05)。结论阿立哌唑合并小剂量氯氮平治疗难治性精神分裂症疗效好,不良反应少且依从性好。