白血病细胞相关抑制物对红细胞系造血影响的初步探讨

本文以体外红系祖细胞培养方法。观察白血病细胞相关抑制物对正常红系祖细胞(CFU-E)的抑制作用。10/10例初发未治急性白血病病人的白血病细胞培养液对CFU-E的生长均有抑制,抑制率25.4～67.4％,平均抑制率为44.35％。结果提示,白血病细胞相关抑制物对正常红细胞系造血也有抑制作用。     

Neuropathology of familial tauopathy

Frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP‐17) is a hereditary progressive neurodegenerative disorder. FTDP‐17 was originally defined in Ann Arbor, Michigan, in 1996. Since then, more than 100 families with FTDP‐17 have been described throughout the world, including 18 families identified in Japan. Genetic studies have identified 40 different mutations in the microtubule‐associated protein tau (MAPT) gene. The clinical features of FTDP‐17 are characterized by behavioral, cognitive and motor disturbances that may occur in various combinations and degrees. Neuropathologic examination shows that various degrees of atrophy may be present in the frontal and temporal lobes, basal ganglia, amygdala and hippocampus. All the brains from patients with FTDP‐17 have also shown the presence of tau deposits in neurons and glial cells. Mutations in MAPT may result in the increased splicing of exon 10, leading to 4‐repeat tau depositions in both neurons and glial cells. MAPT mutations outside of exon 10 show 3‐ and 4‐repeat tau deposits, predominantly in neurons with less glial pathology. Neuronal pathology may resemble that of Alzheimer’s disease or Pick’s disease because of the presence of neurofibrillary tangles or Pick‐like bodies, whereas glial pathology may resemble that of progressive supranuclear palsy or corticobasal degeneration because of the presence of coiled bodies, tufted astrocytes or astrocytic plaques. Correlations between genetic mutations and the heterogeneity of clinical and neuropathologic features remain unclear.     

核仁形成区嗜银蛋白定量对结肠癌前病变的监测作用

应用银染技术,对24例结肠腺癌Ⅱ级不典型增生,30例绒毛状腺瘤,14例绒毛状腺瘤Ⅲ级不典型增生和29例高分化管状腺癌进行银染核仁形成区嗜银蛋白(Ag-NORs)定量研究,观察Ag-NORs数量、形态、大小和分布在结肠肿瘤交界性病变中的表达.提示Ag-NORs四项指标定量研究对结肠脉瘤,特别是Ⅲ级不典型增生与绒毛状腺瘤之结肠癌前病变有较好的监测作用.     

Classification of patients with whiplash associated disorders (WAD): reliable and valid subgroups based on the Multidimensional Pain Inventory (MPI-S).

BACKGROUND: Classification of patients with chronic whiplash associated disorders (WAD) into homogenous subgroups is an important objective in order to tailor interventions and to control for subgroup differences when evaluating treatment outcome. AIMS: The aims of this study were to investigate if it was possible to replicate and describe the three cluster solution and profiles found in other pain groups and describe cluster profiles based on self-reported Multidimensional Pain Inventory-scores for patients with WAD three months after the injury, describe characteristics of the clusters in relation to disability, self-efficacy and coping at the same point in time and to validate the cluster solution by comparing clusters in disability, self-efficacy and coping over time. METHODS: Ninety-one WAD-patients three months after the accident took part in the study. The measures used were the Multidimensional Pain Inventory-Swedish version (MPI-S), The Self-Efficacy Scale, The Coping Strategies Questionnaire and The Pain Disability Index. Cluster analysis was conducted for the total sample MPI-S subscale scores. RESULTS: The adaptive copers cluster represented 42% of the sample, dysfunctional 34% of the sample, and interpersonally distressed 24% of the sample. The external validation of cluster solution showed that there were several significant differences between clusters in self-efficacy, disability and coping measures. There was also a significant interaction effect (clusterxtime) in disability (PDI). Patients in dysfunctional cluster reported a decreased disability over time. CONCLUSIONS: These results support the presence of different subgroups among patients with whiplash associated disorders. This classification can be seen as a complement to a classification based on medical condition.     

Detecting possible vaccine adverse events in clinical notes of the electronic medical record

The Vaccine Safety Datalink (VSD) is a collaboration between the CDC and eight large HMOs to investigate adverse events following immunization through analyses of clinical data. We modified an existing system, called MediClass, that uses natural language processing to identify clinical events recorded in electronic medical records (EMRs). We customized MediClass so it could detect possible vaccine adverse events (VAEs) generally, and gastrointestinal-related VAEs in particular, in the text clinical notes of encounters recorded in the EMR of a large HMO. Compared to methods that use diagnosis and utilization codes assigned to encounters by clinicians and administrators, the MediClass system can both find more adverse events and improve the positive predictive value for detecting possible VAEs.     

99mTc-depreotide生长抑素受体显像的临床应用研究

生长抑素受体显像近年来研究较多，depreotide已成为其研究热点之一。Depreotide在诊断与鉴别诊断临床常见的孤立性肺结节方面有其独特优势；此外，^99mTc—depreotide生长抑素受体显像在乳腺癌、甲状腺癌、淋巴瘤等肿瘤及甲状腺相关性眼病等非肿瘤性疾病也有一定应用前景。     

重组人骨形态发生蛋白7的腺相关病毒载体的构建

目的构建重组人骨形态发生蛋白7(hBMP7)的腺相关病毒(AAV)载体。方法通过RT-PCR方法,从HEK293细胞中扩增hBMP7全长cDNA并亚克隆入通用型AAV载体质粒pSNAV。将pSNAV-hBMP7质粒DNA转染BHK-21细胞,筛选出携带hBMP7的AAV载体细胞株—BHK-21细胞。用能表达Rap和Cap的重组1型单纯疱疹病毒HSV1-rc/ΔUL2按MOI=0·1感染BHK-21载体细胞株后收获病毒液,通过氯仿—PEG/NaCl沉淀—氯仿抽提纯化病毒。结果所克隆的hBMP7全长cDNA经测序证实和已知hBMP7序列完全一致。通过用能表达Rap和Cap的重组1型单纯疱疹病毒HSV1-rc/ΔUL2感染携带hBMP7基因的AAV载体细胞株BHK-21细胞的方法获得了滴度为2×1012vg/ml、纯度达99%的重组人骨形态发生蛋白7的腺相关病毒载体(AAV-hBMP7)。结论RT-PCR方法从HEK293细胞中扩增克隆hBMP全长cDNA是一种有效可行的方法。成功地构建了高滴度、高纯度的AAV-hBMP7载体,为进一步体内及体外研究基因治疗促进骨愈合提供了有力的工具。     

结直肠癌淋巴结转移与部分肿瘤分子标志物表达的相关性研究

目的 探讨部分肿瘤相关分子标志物免疫组织化学的表达与结直肠癌淋巴结转移的相关性.方法 应用免疫组织化学技术检测65例结直肠癌手术标本Ki-67、p53的表达情况,对照手术所见和手术标本的病理检查结果 ,研究这些肿瘤相关分子标志物与肿瘤的生物学特性如浸润和淋巴结转移等的关系.结果 65例结直肠癌手术标本Ki-67、p53免疫组织化学的表达与肿瘤肠壁浸润深度无明显相关性(P＞0.05).Ki-67的表达及Ki-67标记指数的表达与淋巴结转移及Dukes分期有明显的相关性(P＜0.01);p53标记指数的表达与淋巴结转移有相关性(P＜0.05),与Dukes分期有明显的相关性(P＜0.01).结论 作为反应细胞增殖活性的肿瘤相关分子标志物Ki-67,其免疫组织化学的表达程度可间接反映结直肠癌淋巴结转移状况,可能成为反映淋巴结转移的一个标志物.     

乙型肝炎治疗研究进展

乙性肝炎病毒感染所导致的慢性肝炎是我国的一个大问题,给患者及社会带来了很大负担。慢性乙型肝炎现行治疗主要依靠干扰素、核苷类似物等,其存在高耐药、低耐受以及不良反应等问题。新的、更为安全有效的治疗药物及方法亟待发展。最近,科学家们发现人体内的TRIM22分子对抑制乙肝病毒的复制起到重要作用,为乙肝的治疗及有效药物的研发开辟了新的道路。     

Selected monoclonal antibodies can increase the accuracy of cytodiagnosis of neoplastic effusions of cryptic origin expanded in a short term culture.

The use of a selected panel of monoclonal antibodies (MoAb) to tumor associated antigens (TAA) in immunocytochemical (IIC) tests has been shown, in a preliminary study, to be a powerful diagnostic tool for the identification of the primary solid tumor causing metastatic effusion. Despite this improvement in a minority of neoplastic fluids a number of different causes may still determine false negative (FN) immunocytochemical diagnoses. The aim of the present study was to confirm the diagnostic accuracy of this panel of MoAb. This was done by analyzing in IIC tests a larger number of effusions and by evaluating whether the expansion in short term culture of those fluids with an uncertain malignant morphology could provide an adequate cellular substrate for immunocytodiagnosis. The analysis of 314 effusions confirmed the results of the pilot study and demonstrated that the combination of short term culture and immunocytochemical assays can further increase the sensitivity of this novel diagnostic procedure from 84.3% to 95.3%.