Effect of cytokines on liver necrosis

AIM To investigate the effect of cytokines on the liver necrosis.METHODS rIL (interleukin)-1, rIL-6, rIFN (interferon), rTNF (tumor necrosis factor) α with or without D-galactosamine (D-GAL) were injected into the abdominal cavity of mice separately. ALT, TBIL (total bilirubin) and histological changes were observed.RESULTS There was no effect on hepatocyte of normal mice after injection of rIL-1, rIL-6, rIFN alone or together. The serum total bilirubin (TBIL) and liver necrosis of mice increased after rTNFα, rIL-6 or rIFN were used separately with D-GAL. The TBIL level (μmol/L) was 46.19±10.62, 44.55±12.9 and 41.94±14.9, higher than that caused by D-GAL alone (TBIL, 26.67μmol/L±11.14μmol/L). The serum TBIL of mice and the degree of liver necrosis increased after injection of IL-1, IL-6 with D-GAL and rTNFα.CONCLUSION Cytokines, like IL-1,IL-6, IFN and TNFα joined in the process of hepatocyte necrosis. They can enhance the degree of liver necrosis induced by D-GAL.     

儿童造血干细胞移植过程中影响血小板输注效果部分因素探讨

目的 初步探讨儿童造血干细胞移植过程中影响血小板输注效果的因素.方法 回顾性分析了处于骨髓清空期的造血干细胞移植患儿的305次血小板输注情况,观察患儿性别、所患疾病、移植类型及血小板库存天数与调整后的血小板计数增加值校正指数(aCCI)和血小板无效输注的发生率之间的关系.结果 女性患儿血小板输注效果优于男性(F=2.1...     

情绪应激后大鼠颞下颌组织学及关节盘内P物质的相关变化

目的:观察情绪应激后大鼠颞下颌关节(1temporomandibular joint,TMJ)盘内P物质(substance P,SP)的表达及微结构的变化,探讨情绪因素对TMJ的影响.方法:SD大鼠90只,随机分为3组.包括情绪应激组,对照组及足部电击组,每组30只.人为造成情绪应激的动物模型,分别在1周,3周,5周时取对照组和情绪应激组大鼠的颞下颌关节,在同一部位的切片,行SP免疫组化染色.光镜观察,图像分析,并与对照组进行比较.结果:颞下颌关节盘内能发现有明显的SP阳性神经纤维分布,主要分布在关节盘前、后带,且多分布在近盘边缘部,图像分析表明单视野中SP阳性纤维数与对照组差异显著(P<0.01);对照组与情绪应激组1周之间有显著性差异(P<0.05),和3周、5周之间差异不显著(P>0.05).结论:在大鼠情绪应激状态下TMJ的一系列病理性改变中,P物质可能参与了这种病理过程,但各实验组间的变化差异有所不同.     

结核分枝杆菌FtsZ抑制剂的筛选和活性研究

目的筛选结核分枝杆菌FtsZ的特异性抑制剂,为抗结核药物的研发提供先导化合物。方法应用本实验室已经建立的结核分枝杆菌FtsZ抑制剂筛选模型对化合物库进行筛选,获得能够抑制FtsZ的化合物202E,对其进行IC50以及分子水平活性测定,并利用DS 4.0软件将化合物202E与FtsZ的活性位点进行对接。结果化合物202E能够抑制结核分枝杆菌FtsZ的GTP酶活性,其IC50为15.46μmol/L。202E还能够抑制FtsZ蛋白的聚合。通过分子对接,发现202E能够与FtsZ的GTP结合位点结合,抑制FtsZ的GTP酶活性。结论化合物202E是活性较好的结核分枝杆菌FtsZ抑制剂。     

小脑梗死56例临床分析

目的 探讨小脑梗死的临床及影像学特点.方法 对我院2002年6月～2005年6月收治的56例小脑梗死患者的临床资料进行回顾性分析.结果 最常见而且最主要的临床症状为眩晕、小脑性共济失调.病因及危险因素主要为高血压病和心脏病.60～65岁为高发年龄阶段.颅脑CT48 h内阳性率32.2%,颅脑MRI确诊率100%.脑疝为主要死因.结论 中老年人持续出现眩晕、共济失调要注意小脑梗死的可能,颅脑MRI检查优于CT.     

Use of Magnetic Resonance Imaging in Detection of Breast Cancer Recurrence: A Systematic Review

Background

Diagnosis of breast cancer recurrence can be difficult as a result of the presence of scar tissue in the breast. Magnetic resonance imaging (MRI) may be superior to traditional imaging in diagnosis of recurrence because of its ability to differentiate malignancy from scarring. Current guidelines on investigation of suspected breast cancer recurrence recommend MRI when other investigations have equivocal findings. We performed the first systematic review on this topic.

Methods

Literature search revealed 35 potentially relevant studies; 10 were included in final analysis. Included were clinical studies comparing MRI with another diagnostic modality for diagnosis of breast cancer recurrence, with at least 10 patients, in the English language. Data extraction focused on sensitivity and specificity of standard diagnostic modalities and MRI for diagnosis of local disease recurrence.

Results

In total 494 patients were assessed across 10 studies; all were case series. Sensitivity of MRI for detection of recurrence ranged 75?C100?%, while specificity ranged 66.6?C100?%. Both sensitivity and specificity increased when MRI was performed after a longer time interval from the original surgery, although the longest follow-up reported was only 36?months. A negative MRI can avoid the need for further biopsy.

Conclusions

Available data are based on clinically heterogeneous case series and superiority over standard triple assessment for breast cancer recurrence has not been proven. At present, MRI cannot be recommended in the routine diagnostic assessment for breast cancer recurrence but has a potentially useful role as a second-line investigation. A negative MRI is more useful than a positive MRI as positive MRIs require further investigation.