翼状胬肉切除术后并发角膜溃疡的危险因素分析

目的 探讨翼状胬肉切除术后并发角膜溃疡的危险因素。方法 选取2017年5月—2022年3月在青岛市中医医院行翼状胬肉切除术的患者153例,统计术后角膜溃疡发生情况,将并发角膜溃疡的患者作为发生组,其余作为未发生组。比较两组患者一般资料,采用多因素Logistic逐步回归模型分析翼状胬肉切除术后并发角膜溃疡的危险因素。结果 153例行翼状胬肉切除术的患者,术后30例并发角膜溃疡作为发生组,其余123例作为未发生组。与未发生组比较,发生组糖尿病、复发性翼状胬肉、手术操作不规范、角膜缝线松动及激素类药物应用不合理的构成比升高（P <0.05）。多因素Logistic逐步回归分析结果显示,糖尿病[OR=2.678(95%CI:2.013,3.343)]、复发性胬肉[OR=2.280(95%CI:1.659,2.900)]、手术操作不规范[OR=7.036(95%CI:4.152,9.919)]、角膜缝线松动[OR=3.466(95%CI:2.632,4.300)]及激素类药物应用不合理[OR=5.217(95%CI:3.021,7.414)]均是翼状胬肉切除术后并发角膜溃疡的危险因素（P...     

Analysis of microdissected prostate tissue with ProteinChip arrays--a way to new insights into carcinogenesis and to diagnostic tools

Prostate carcinomas are one of the most common malignancies in western societies. The pathogenesis of this tumor is still poorly understood. These tumors present with two characteristic features: epithelial-mesenchymal interactions, which play a pivotal role for tumor development and most of clinically manifest cancers arise in prostate proper compared to a minority of tumors which develop in the transitional zone. Deciphering the epithelial-mesenchymal cross talk and identification of molecular pecularities of the sub-populations of cells in different zones can therefore help understanding carcinogenesis and development of new, non-invasive tools for the diagnosis and prognosis of prostate carcinomas which has remained a challenge until today. A ProteinChip array technology (SELDI = surface enhanced laser desorption ionization) has been developed recently by Ciphergen Biosystems enabling analysis and profiling of complex protein mixtures from a few cells. This study describes the analysis of approximately 500-1000 freshly obtained prostate cells by SELDI-TOF-MS (surface enhanced laser desorption ionization time-of-flight mass spectrometry). Pure cell populations of stroma, epithelium and tumor cells were selected by laser assisted microdissection. Multiple specific protein patterns were reproducibly detected in the range from 1.5 to 30 kDa in 28 sub-populations of 4 tumorous prostates and 1 control. A specific 4.3 kDa peak was increased in the prostate tumor stroma compared to normal prostate proper and transitional zone stroma and increased in prostate tumor glands compared to normal prostate proper and transitional zone glands. Coupling laser assisted microdissection with SELDI provides tremendous opportunities to identify cell and tumor specific proteins to understand molecular events underlying prostate carcinoma development. It underlines the vast potential of this technology to better understand pathogenesis and identify potential candidates for new specific biomarkers in general which could help to screen for and distinguish disease entities, i.e. between clinically significant and insignificant carcinomas of the prostate.     

散发性戊型肝炎病毒感染的诊断

用基因工程重组的戊型肝炎病毒基因结构区第二码框架和第二读码框架具有免疫表位的嵌合抗原，建立了间接酶联免疫法，检测散发性急性肝炎病人血清中抗－ＨＥＶＩｇＧ和ＩｇＭ抗体。在４６例急性肝炎病人中出抗－ＨＥＶＩｇＧ抗体阳性７例，阳性率为１５．２２％，７例ＩｇＧ抗体阳性中，有５例ＩｇＭ抗体也阳性，占７１．４％。     

The acetylcholine release enhancer linopirdine induces Fos in neocortex of aged rats

Centrally acting cholinergic agents induce the immediate early gene c-fos in the rat brain resulting in transient increases of Fos protein, most notably in the cerebral cortex. In this study we have monitored by Fos immunohistochemistry the effect of the acetylcholine release enhancer linopirdine (DUP996) on the immediate early gene c-fos in brains of 3 months and 30 months old rats. In young rats linopirdine had only a marginal effect on Fos expression. In contrast, in aged rats linopirdine caused widespread expression of Fos throughout neocortex. In somatosensory cortex, the induction of the c-fos gene by linopirdine was nearly completely blocked by atropine and scopolamine and strongly attenuated by the NMDA receptor blockers CPP and MK-801. The results suggest that the age-related decline in acetylcholine release in rodents can be partially compensated for by administration of linopirdine.     

IL-13对大鼠急性肾缺血再灌注时IL-1β表达的影响

目的:观察IL-13对急性肾缺血再灌注时IL-1β表达的影响。方法:Wistar雄性大鼠57只,随机分为8组:正常组(normal);假手术组(sham);缺血组:(I)缺血再灌注组(I/R);治疗对照组-1(C-1);治疗对照组-2(C-2);治疗组-1(T-1)和治疗组-2(T-2)。阻断大鼠双侧肾脏血流45min再灌注24h建立急性肾缺血再灌注模型;治疗组分别于阻断血流前、后分别从双侧肾动脉开口注射入1.5μg/50gbw鼠重组白细胞介素13(rmIL-13);检测各组大鼠IL-1β血清水平和肾脏表达,以及肾功能和肾脏病理。结果:(1)治疗组肾脏IL-1β基因(TtoC:P＜0.01)和蛋白表达(T-1toC-1:P＜0.01;T-2toC-2:P＜0.05)明显减少,血清IL-1β水平明显下降;(2)肾功能障碍和肾组织病理变化明显减轻,肾小管损害评分减少(C-1toT-1:45.20±8.64to21.05±8.82,P＜0.01;C-2toT-2:42.25±11.15to23.25±7.31,P＜0.01);(3)血清IL-1β水平与BUN、Cr成正相关(r=0.708,P＜0.01;r=0.770,P＜0.01)。结论:IL-13能有效地抑制大鼠急性肾缺血再灌注损伤IL-1β的表达。     

hCG对JEG-3滋养细胞系表达细胞因子的影响

目的：揭示人类绒毛膜促性腺激素（hCG)是否通过改变细胞因子的生成而影响滋养细胞的侵袭性。方法：以永生化的滋养细胞系JEG－3为研究对象，采用逆转录多聚酶链反应（RT－PCR）方法观察了hCG对JEG－3细胞与细胞侵袭力调节有关的多种因素因子表达的影响，结果：JEG－3细胞表达HGF，IGF－II，VEGF和TGF－β3，且VEGF的表达以VEGF121和VEGF165为主，而不表达IGF，TGF－1β，TGF－β2，IL－β1，25U／mL hCG处理50h可显著降低JEG－3细胞中HGF的表达，同时强烈诱导VEGF121和VEGF165的表达，而其它基因的表达未发生明显变化，结论：HGF对滋养细胞的侵入起促进作用，而VEGF则具有抑制效应，说明，高浓度的hCG可能通过两种细胞因子的自分泌机制对滋养细胞的侵入起抑制作用。     

Roles of the Maltese cross form in the development of parasitemia and protection against Babesia microti infection in mice

Babesia microti, a hemoprotozoan parasite of rodents, is also important as a zoonotic agent of human babesiosis. The Maltese cross form, which consists of four masses in an erythrocyte, is characteristic of the developmental stage of B. microti. Monoclonal antibody (MAb) 2-1E, which specifically recognizes the Maltese cross form of B. microti, has been described previously. In the present study, we examined the roles of the Maltese cross form during the infectious course of B. microti in mice. The number of the Maltese cross form increased in the peripheral blood of infected mice prior to the peak of parasitemia. With confocal laser scanning microscopy, MAb 2-1E was found to be reactive with the ring form, with the parasites undergoing transformation to the Maltese cross form and subsequent division, and also with extracellular merozoites. Furthermore, the Maltese cross form-related antigen (MRA) gene was isolated from a B. microti cDNA library by immunoscreening with MAb 2-1E, and the nucleotide sequence was determined. Genomic analyses indicated that the MRA gene exists as a single-copy gene in B. microti. Immunization of mice with recombinant MRA induced significant protective immunity against B. microti infection. These findings indicate that the Maltese cross form plays important roles in both the development of parasitemia and the protective response against the infection.     

Wnt2信号通路重要成员在胶质瘤中的表达及其意义

近来发现Wnt信号通路对个体发育和肿瘤生成具有重要作用[1-2].为进一步探讨Wnt通路在胶质瘤中是否存在表达异常及其在胶质瘤生成中的作用,我们采用RT-PcR、组织芯片免疫组织化学染色以及蛋白印迹法,对人脑胶质瘤Wnt2通路相关因子的表达变化及其意义进行了分析.