急性病毒性肝炎住院患者血清学分型与流行病学分布研究

本文收集了西安市住院急性病毒性肝炎患者血清标本２９３份，用ＥＬＩＳＡ进行分型检测，并作流行病学调查。结果发现：甲肝占６５．１９％，乙肝占１０．９２％，丙肝占４．７８％，丁肝占３．７５％，戊肝占４．４４％，诊断不明者占１０．９２％。结果表明，在西安市住院的急性病毒性肝炎中，甲肝为主要类型；与以往结果比较，甲肝患者的发病年龄明显后移；除乙肝外，各型肝炎中男性均多于女性，尤以丁肝和戊肝为著；甲肝有明显的     

Bcl-2和Caspase-9对儿童癫痫持续状态近期预后的预测价值

目的探讨血清B细胞淋巴瘤相关蛋白-2(Bcl-2)和半胱氨酸天冬氨酸蛋白酶-9(Caspase-9)对儿童癫痫持续状态(SE)近期预后的预测价值。 方法选择SE患儿62例为SE组,选择同期体检健康儿童62例为对照组;按照预后将SE患儿分为预后不良组和预后良好组。癫痫持续状态严重程度量表(STESS)评估SE患儿SE严重程度。ELISA检测各组血清Bcl-2和Caspase-9水平。结果SE组Bcl-2和Caspase-9水平高于对照组(P＜0.05)。预后不良组和预后良好组STESS评分、Bcl-2和Caspase-9水平比较,差异有显著性(P＜0.05)。STESS评分、Bcl-2和Caspase-9是影响SE患儿近期预后的独立影响因素(P＜0.05);入院血清Bcl-2和Caspase-9联合检测对SE患者近期预后具有较好的预测效能(P＜0.05)。 结论血清Bcl-2和Caspase-9是SE患儿近期预后的有效预测指标。     

SNHG6靶向miR-101/TGFBR1促进AMI小鼠左心室心肌纤维化

目的探讨SNHG6对急性心肌梗死(AMI)小鼠左心室心肌的影响。 方法将30只雄性C57/BL6小鼠构建成AMI小鼠后随机均分为AMI组、AMI+SNHG6组、AMI+miR-101-3p组、AMI+SNHG6+miR-101-3p组、AMI+miR-101-3p+TGFBR1组,另设正常小鼠6只为假手术组。qRT-PCR检测AMI小鼠SNHG6、miR-101-3p表达水平。心脏彩超检测各组小鼠左室射血分数(LVEF);马松和天狼星红染色法以及免疫组化分析各组小鼠左心室心肌纤维化变化。将H9C2细胞株分为阴性对照组(转染空质粒)、SNHG6组(转染质粒SNHG6)、miR-101-3p组(转染质粒miR-101-3p)。Western blotting检测各组TGFBR1蛋白表达;采用双荧光素酶报告基因法预测并验证SNHG6/miR-101-3p/TGFBR1荧光素酶活性及调控机制。 结果AMI小鼠较假手术组SNHG6表达显著增加,miR-101-3p降低(P＜0.05)。与AMI组比较,AMI+SNHG6组小鼠LVEF降低,心肌纤维化程度加重(P＜0.05);AMI+miR-101-3p组LVEF升高,心肌纤维化程度减轻(P＜0.05)。AMI+SNHG6+miR-101-3p组较AMI+SNHG6组LVEF升高、心肌纤维化程度减轻(P＜0.05),而AMI+miR-101-3p+TGFBR1组较AMI+miR-101-3p组LVEF降低、心肌纤维化程度加重(P＜0.05)。双荧光素酶报告基因法验证显示,miR-101-3p组SNHG6、TGFBR1野生型质粒的荧光素酶活性较阴性对照组明显降低(P＜0.05)。 结论SNHG6抑制miR-101-3p上调TGFBR1加重AMI小鼠左心室心肌纤维化。     

Diffuse type of senile plaques in the cerebellum of Alzheimer-type dementia demonstrated byβ protein immunostain

Summary We studied senile plaques (SP) in the cerebella of six autopsied subjects with Alzheimer-type dementia (ATD) and ten non-ATD autopsied subjects between the ages of 78 and 90. Neither SP nor amyloid angiopathy (AA) was observed in any of the non-ATD subjects. In the four of the six ATD subjects, diffuse plaques in the molecular layer were seen as ill-defined areas of fine fibrillar materials by protein immunostaining with formic acid pretreatment, the modified Bielschowsky stain, and periodic acid-methenamine silver (PAM) stain. The plaques were not visible with Bodian, Congo red, or periodic acid-Schiff stains. Compact plaques in the Purkinje cell or in the granular cell layers were found in three of the six subjects. Their amyloid core was often surrounded by areolar amyloid deposits. AA was observed in three of the six subjects. The argyrophilia of the diffuse and compact plaques, demonstrated by the modified Bielschowsky and PAM stains, became undetectable when the sections were first treated with formic acid. Such treatment made the plaques immunoreactive with protein antiserum. The findings suggested that cerebellar diffuse plaques and compact plaques consist mainly of an amyloid component, and are characteristic of ATD.     

壬苯醇醚避孕药膜的临床研究

894对健康、已育的育龄夫妇,随机分两组:447对使用壬苯醇醚方型膜,447对使用帽型膜,经两年连续观察。按生命表统计法处理数据。总使用妇女月,方型组9601,帽型组9382,随访率100%。累计停用率、妊娠率和续用率,方型组分别为16.8%、15.3%和83.2%,帽型组为18.4%、15.6%和81.6%,两组无显著差异(p>0.05)。临床和实验室资料表明壬苯醇醚药膜是安全、有效、简便、易于推广的避孕药具之一。     

Simultaneous detection of fluorescent in situ hybridization and in vivo incorporated BrdU in a human bladder tumour

We have used fluorescent in situ hybridization and simultaneous in vivo bromodeoxyuridine labelling of a solid bladder cancer to examine tumour cell subsets for possible proliferative growth differences. In this dual-labelled preparation, most tumour cell nuclei exhibited monosomy 9, consistent with reported karyotypes of bladder cancer. Incorporated bromodeoxyuridine was visualized with a fluoresceinated antibody in 5-6 per cent of the tumour cells, concordant with S-phase estimates by cell cycle analysis of the flow cytometric DNA histogram. A majority of the bromodeoxyuridine-positive cells also carried the monosomy 9 chromosome abnormality. This is the first report to demonstrate the feasibility of combined in situ hybridization and detection of bromodeoxyuridine incorporated in vivo in human tumour cells in order to provide information on the growth rate of specific subsets of tumour cells identified by chromosomal constitution.     

Caspase—3与肝细胞癌的细胞凋亡

Caspase 3是哺乳动物细胞凋亡的关键蛋白酶 ,亦参与了肝细胞癌的细胞凋亡的病理过程。免疫组化分析肝细胞癌中Caspase 3表达强度明显减弱 ,认为在肝细胞癌的发生过程中 ,Caspase 3的活性通过多种途径受到抑制。研究Caspase 3与影响肝细胞癌细胞凋亡各因素之间的关系 ,有助于寻找和开辟肿瘤治疗的新途径。     

S100A8, S100A9 and the S100A8/A9 heterodimer complex specifically bind to human endothelial cells: identification and characterization of ligands for the myeloid-related proteins S100A9 and S100A8/A9 on human dermal microvascular endothelial cell line-1 cells

The natural ligands of the S100 EF hand proteins S100A8 and A9 [myeloid-related proteins 8 and 14] have long been searched for in order to further the understanding of the role of the S100A8/A9-expressing monocyte subpopulation in progressing inflammatory processes. We demonstrate that S100A8, S100A9 and the S100A8/A9 heterodimeric complex bind to human dermal microvascular endothelial cell line (HMEC)-1 with an increasing binding capacity progressing from S100A8 < or = S100A9 < or = S100A8/A9. Similar results were obtained in the apolipoprotein E knockout mouse model, where preferably recombinant S100A9 but no S100A8 bound to the endothelium of the aorta ascendens. The binding of the S100A8/A9 heterodimer complex to activated HMEC-1 is specific as demonstrated by a dose-responding and satiable binding curve and the competition of FITC-labeled versus unlabeled protein. The protein character of the binding site was proven by treatment with trypsin. S100A8/A9 binding to HMEC-1 is inducible by lipopolysaccharide and tumor necrosis factor-alpha, and in the presence of calcium. A 163-kDa protein was isolated from a cell lysate of activated HMEC-1 cells using an affinity-chromatography protocol. The endothelial cell-associated ligand proteins isolated by the use of the S100A9 monomer and the S100A8/A9 dimer were subjected to mass spectrometry for protein identification. Clearly, alpha(2)-macroglobulin was identified as a binding partner for the S100A9 monomer, whereas no protein could be identified from the database for the ligand of the S100A8/A9 dimer.     

Preaxial acrofacial dysostosis (Nager syndrome) associated with an inherited and apparently balanced X;9 translocation: Prenatal and postnatal late replication studies

We report on an infant with preaxial acrofacial dysostosis (Nager syndrome) who was diagnosed prenatally as having an apparently balanced X/autosome translocation [46,X,t(X;9)(p22.1;q32)mat] inherited from a previously diagnosed mosaic translocation carrier mother [46,XX/46,X,t(X;9)(p22.1;q32)]. Replication studies on amniocytes showed the normal X chromosome to be late replicating while the same studies repeated on the infant's lymphocytes showed the translocated X chromosome to be late replicating in most cells. Late replication studies of the mother's lymphocytes demonstrated that the normal X chromosome was late replicating in most cells. The presence of Nager syndrome in this infant may be the result of critical break-points and/or position effects on chromosome 9, inducing expression of a gene responsible for the syndrome. © 1993 Wiley-Liss, Inc.     

Molecular and biological analysis of echovirus 9 strain isolated from a diabetic child

The full-length infectious cDNA clone was constructed and sequenced from the strain DM of echovirus 9, which was recently isolated from a 6-week-old child at the clinical onset of type 1 diabetes. Parallel with the isolate DM, the full-length infectious cDNA clone of the prototype strain echovirus 9 Barty (Barty-INF), was constructed and sequenced. Genetic relationships of the sequenced echo 9 viruses to the other members of the human enterovirus type B species were studied by phylogenetic analyses. Comparison of capsid protein sequences showed that the isolate DM was closely related to both prototype strains: Hill and Barty-INF. The only exception was the inner capsid protein VP4 where serotype specificity was not evident and the isolate DM clustered with the strain Hill and the strain Barty-INF with echovirus 30 Bastianni. Likewise, the nonstructural protein coding region, P2P3, of isolate DM was more similar to strain Hill than to strain Barty-INF. However, like echovirus 9 Barty, the isolate DM contained the RGD-motif in the carboxy terminus of capsid protein VP1. By blocking experiments using an RGD-containing peptide and a polyclonal rabbit antiserum to the alpha(v)beta(3)-integrin, it was shown that this molecule works as a cellular receptor for isolate DM. By using primary human islets, it was shown that the isolate DM is capable of infecting insulin-producing beta-cells like the corresponding prototype strains did. However, only isolate DM was clearly cytolytic for beta-cells. The infectious clones that were made allow further investigations of the molecular features responsible for the diabetogenicity of the isolate DM.