Invasive pathway of Listeria ivanovii in human amnion-derived WISH cells

Among Listeria genus, only two species, Listeria ivanovii and Listeria monocytogenes, are pathogenic. L. ivanovii is almost only associated with infections in animals, mainly sheep and cattle, and has rarely been associated with human infections, whereas L. monocytogenes causes severe illnesses in both humans and animals. To further investigate the pathogenetic features of L. ivanovii in humans, we undertook a study in which the intracellular behaviour of this pathogen was analysed in WISH cells, a cell line derived from human amniotic tissue, and compared to that of L. monocytogenes. Using microbiological, biochemical, and ultrastructural approaches, we demonstrate that L. ivanovii can adhere to and invade human amniotic cells, lyse the phagosomal membrane, polymerize host cell actin, and spread from cell to cell more efficiently than L. monocytogenes. However, although L. ivanovii is capable of specifically infecting and replicating in human amnion cells, its survival in cytoplasm is limited compared to that of L. monocytogenes.     

医用漱口水治疗糖尿病病人慢性牙周炎效果观察

目的观察医用漱口水对糖尿病病人慢性牙周炎的治疗效果。方法将156例2型糖尿病并发慢性牙周炎病人随机分为2组,对照组采用基础治疗,实验组在基础治疗基础上加漱口水治疗,观察治疗前后病人牙周指标的变化。结果两组病人治疗前菌斑指数（PLI）、牙周探针深度（PD）、附着水平丧失（AL）、牙齿松动度（TM）均无明显差异（P〉0．05）。两组病人治疗后PD、AL、TM比较差异有显著性（t=3．498～6．842,P〈0．01）。结论医用漱口水可以明显改善糖尿病病人牙周基础治疗后的疗效。     

导致颅眼部损害的蝶筛窦黏液囊肿的鼻内镜手术治疗

目的探讨鼻内镜手术治疗引起颅眼部损害的蝶筛窦黏液囊肿的效果。方法对37例引起颅眼部损害的蝶筛窦黏液囊肿经鼻内镜手术治疗病人的临床资料进行回顾分析。结果鼻内镜手术后37例病人颅眼部损害均有所好转或治愈,无手术相关并发症发生。随访10个月~3年,鼻内镜下复查术腔上皮化良好,囊肿无复发。结论鼻内镜手术是治疗引起颅眼部损害的蝶筛窦囊肿的有效方法之一。     

Chemokine CXCL8 modulates GluR1 phosphorylation

The chemokine interleukin 8/CXCL8 induces the phosphorylation of the GluR1 subunit of the AMPA-type glutamate receptor in neurons and transfected HEK cells, on both serine 845 (S845) and 831 (S831) residues. We previously described that CXCL8 receptor CXCR2 and GluR1 co-precipitate and that GluR1/CXCR2 co-expression both in HEK cells and neurons impairs CXCL8-induced cell migration. Here we show that replacement of S845 with Ala (A), but not with Glu (E), strongly reduces GluR1/CXCR2 interaction and abolishes the impairment of CXCL8-induced cell migration. Considered together our findings point to the phosphorylated state of S845GluR1 as a determinant of GluR1-CXCR2 physical coupling.     

Language organisation in left perinatal stroke

Right-hemispheric organisation of language has been observed following early left-sided brain lesions. The role of the site of damage is still controversial, as other aspects influence the pattern of speech organisation including timing of the lesion and the presence of epilepsy. We studied a group of 10 term-born children homogeneous for timing/type of lesion and clinical picture. All subjects had left perinatal arterial stroke, right hemiplegia, normal cognitive functions and no or easily controlled epileptic seizures. In half the patients, the lesion clearly involved Broca's area, in the other half it was remote from it. Language lateralization was explored by an fMRI covert rhyme generation task. Eight of 10 subjects showed a right lateralisation of language, including all five patients with a damaged left Broca and 3/5 of those without it. Group analysis in patients with right hemispheric organisation showed brain activations homotopic to those found in the left hemisphere of a matched control group. Our findings confirm that, at the end of gestation, the human brain exhibits extraordinary (re-)organisational capabilities. Language organisation in the right hemisphere is favoured by the presence of destructive lesions of the left Broca's area at birth, and occurs in brain regions homotopic to those usually involved in language processing.     

左心室三维应力与左心室收缩功能的相关性研究

目的研究左心室三维应力与反映左心室收缩功能的生物力学指标——最大心肌劲度(maxEav)的相关性,以获得反映左心室收缩功能的简单且实用的生物力学指标。方法选取34例健康人为研究对象,其中男性19例,女性15例;年龄34～75岁,平均年龄49.2岁。应用超声心动图测定心脏左心室收缩末期内径和后壁厚度及射血分数;左心室收缩末期中壁长短径、室壁厚度;联合袖带肱动脉血压值计算左心室收缩末期压力。应用上述各测值计算maxEav及左心室收缩末期径线、圆周、长轴应力(σr、σθ、σm),进行相关性统计学分析。结果σr=(-62.55±0.53)N/cm2;σθ=(27.81±1.36)N/cm2;σm=(62.58±2.88)N/cm2;maxEav=(226.52±9.36)N/cm2;LVEF=(63.13±1.01)%。maxEav与σr无相关性(r=0.067,P>0.05);maxEav与σθ有极显著负相关性(r=-0.510,P<0.01);maxEav与σm有极显著正相关性(r=0.563,P<0.01)。LVEF与三向应力无相关性(P>0.05)。结论应用左心室收缩末期圆周及长轴应力两项生物力学指标评价左心室收缩功能较为简便实用且准确。     

膨胀期白色白内障的连续环形撕囊技巧

目的研究膨胀期白色白内障超声乳化术中针刺入囊袋抽取部分液化皮质,再行连续环形撕囊的安全性和有效性。方法对膨胀期白色白内障患者112只眼(96例),随机分为2组。针刺入囊袋抽取部分液化皮质后撕囊组(A组)58只眼(50例),常规手法撕囊组(B组)54只眼(46例)。结果 A组中成功完成连续环形撕囊56只眼,B组中成功完成连续环形撕囊42只眼,两组比较有显著性差异(P<0.05)。结论膨胀期白色白内障采用针刺入囊袋抽取部分液化皮质,再行连续环形撕囊,能获得较为理想的手术效果,是一项具有应用价值的方法。     

血流向量成像定量评价急性心肌梗死患者等容收缩期左心室涡流

目的应用血流向量成像(VFM)技术分析急性心肌梗死(AMI)患者等容收缩期左心室内血液流场的特点。方法选择AMI患者25例和正常志愿者40名,采集两组心尖三腔心切面彩色血流动态图像,应用VFM分析软件测量等容收缩期左心室内涡流横径、纵径,涡流的横向、纵向相对位置及其最大向量速度、涡流强度等指标,比较上述两组各参数。结果与正常志愿者比较,AMI患者等容收缩期涡流纵径增大(P<0.05),横向位置更靠近后侧壁,最大向量速度、涡流强度均减低(P<0.05)。结论等容收缩期AMI患者左心室内涡流纵径、横向位置、最大向量速度、涡流强度与正常人相比存在差异,涡流形态、位置发生改变。VFM为评价心腔内血液流场特征提供了新的途径。     

Diogenes syndrome in patients suffering from dementia

Diogenes syndrome (DS) is a behavioral disorder of the elderly. Symptoms include living in extreme squalor, a neglected physical state, and unhygienic conditions. This is accompanied by a self-imposed isolation, the refusal of external help, and a tendency to accumulate unusual objects. To explore the phenomenon of DS in dementia we searched for the terms: “Diogenes syndrome, self-neglect, dementia. ” It has long been understood that individuals with dementia often become shut-ins, living in squalor, in the Eastern Baltimore study, dementia was present in 15% of the elderly cases with moderate and severe social breakdown syndrome; twice as many as in the general population of the same age group. Researchers have underlined the frequent presence of DS (36%) in frontotemporal dementia (FTD): different neuropsychological modifications in FTD may contribute to symptoms of DS. The initial treatment should be a behavioral program, but there is not sufficient information regarding pharmacological treatment of the syndrome.