常见革兰阳性细菌鉴定与耐药检测基因芯片的临床应用

目的利用基因芯片技术进行常见革兰阳性细菌的细菌鉴定和耐药性检测。方法用生理生化鉴定和药敏纸片法确定445份革兰阳性细菌菌株的细菌种类和耐药性,盲法进行革兰阳性细菌鉴定与耐药检测基因芯片的检测,用SPSS 10.0 for Windows软件统计分析。结果与临床常规方法相比,耐药检测基因芯片鉴定指标的灵敏度均>96%,特异度均>98%;耐药检测指标的灵敏度均>94%,特异度均>90%。χ2检验结果P值均>0.05,基因芯片检测结果与临床常用方法检测结果差异无统计学意义。Kappa值均>0.75,2种方法一致性较好。结论基因芯片技术对细菌鉴定和耐药检测有一定的临床应用价值。     

Hodgkin Lymphoma after Disseminated Mycobacterium genavense Infection,Germany

Mycobacterium genavense infection, a rare nontuberculous mycobacteria infection, occurs in heavily immunocompromised patients (i.e., those with advanced HIV disease, genetic disorders, or acquired immunologic disorders and those undergoing immunosuppressive therapy). We report a case of disseminated M. genavense infection preceding Hodgkin lymphoma in a patient without obvious risk factors for this infection.     

基于学术论文产出的国家公派研究生培养质量分析

本文基于本校开展公派研究生项目的工作实践,将公派研究生和同级同导师未留学研究生进行对照,采用文献计量学方法,对研究生论文产出、分布特点和影响力进行统计,对比分析论文发表数量、被引频次、影响因子、合作状况、高水平期刊论文比例等客观数据,以期从一个侧面反映国家公派研究生项目对提高研究生培养质量所发挥的作用,为开展公派研究生项目的其他院校提供参考。     

孤独症鼠模型脑组织CaMKⅡ和ERK表达的相关研究

目的 探讨钙调蛋白激酶Ⅱ(CaMK Ⅱ)和细胞外信号调节激酶(ERK)在孤独症谱系障碍发病中的作用。方法 孕12.5 d Sprague-Dawley孕鼠腹腔注射丙戊酸钠600 mg/kg建立子代孤独症谱系障碍模型大鼠,对照组注射同等剂量生理盐水。利用HE染色、免疫组化和图像分析技术观察比较出生后1、7、14 d和28 d两组大鼠脑部CaMK Ⅱ、ERK表达情况。结果 HE染色:出生后1 d、7 d模型组神经元数量较少,出生14 d后剧增,出生后28 d仍高于对照组。免疫组化:出生后1~14 d两组CaMKⅡ、ERK表达均显著升高(P<0.001),出生28 d后表达趋于稳定(P>0.05);与对照组相比,模型组各日龄大鼠CaMK Ⅱ、ERK表达水平均增高(P<0.001);CaMK Ⅱ、ERK于出生后1 d、7 d表达显著升高(P<0.001),出生后14 d表达量最多(P<0.001),出生28 d后趋于稳定(P>0.05)。结论 孤独症谱系障碍模型大鼠大脑皮层CaMK Ⅱ、ERK的表达增加,尤其是在出生后早期。     

不同类型栓子所致急性缺血大鼠脑组织形态学变化及其蛋白表达差异的研究

目的 探讨不同类型栓子所致急性缺血大鼠脑组织形态学变化及其蛋白表达的差异.方法 健康无特定病原体雄性Sprague-Dawley(SD)大鼠120只.粉碎胆固醇晶体,制备胆固醇栓子.取大鼠自体动脉血,凝固烘干后,制成血栓栓子.栓子直径为60～100μm.采用改进的微栓子栓塞法(少量多次注射栓子代替传统的一次性注射)制作...     

饮酒对成人红细胞免疫及其调节功能影响的研究

目的 探讨饮酒对红细胞免疫及其调节功能的影响.方法 对饮酒组(94人)和对照组(62人)健康成人分别检测其红细胞受体花环率(RBC-C3bRR)、红细胞免疫复合物花环率(RBC-ICR)、红细胞免疫增强因子(EF)及抑制因子(IF)的变化.结果 饮酒组的RBC-C3bRR、EF水平低于非饮酒组(P均＜0.01),而RBC-ICR水平则高于非饮酒对照组(P＜0.01);相关分析表明RBC-C3bRR、EF水平与饮酒量及饮酒时间负相关,而RBC-ICR、IF水平则与被动饮酒量及饮酒时间呈正相关.结论 长期大量饮酒可引起继发性免疫功能低下及降低红细胞免疫调节能力.     

Corneal densitometry in patients with arcus senilis and its correlation with serum lipid levels

Purpose:To evaluate corneal densitometry (CD) of patients with arcus senilis (AS) and its association with the serum lipid markers.Methods:This is a cross-sectional, case-control study. The AS diagnosis was made clinically. Forty-five eyes of 45 patients with AS and 38 eyes of 38 age-matched control subjects with no noticeable AS were enrolled in the study. All participants underwent detailed ophthalmologic examination along with corneal Scheimpflug imaging with CD measurement. The evaluated serum lipid markers of the participants included total cholesterol, triglyceride, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and very-low-density lipoprotein (VLDL). The Spearman correlation analysis was used to correlate the serum lipid values and the CD. P < 0.05 was defined as statistically significant.Results:The male to female ratio was 26/19 and 14/24 in the study and control groups, respectively (P = 0.057). The mean age was 59.56 ± 8.7 and 56.47 ± 8.6 years in the study and control groups, respectively (P = 0.117). The mean total CD values in the zones extending from 2 to 12 mm were higher in the study group than in the control group (P < 0.001). The serum HDL level was found to be significantly decreased in the study group compared to the control group (P = 0.048 and Z = −1.976). There was a significant positive correlation between the serum triglyceride level and the CD value of the outermost zone (10–12 mm) (r = 0.334 and P = 0.025).Conclusion:The CD of patients with AS was found to increase not only in the peripheral zone but also in the cornea’s paracentral zone compared to the healthy controls. The serum triglyceride level should give an insight into the intensity of arcus senilis. The serum HDL levels were decreased in patients with AS.     

Renoprotective effect of N-acetylcysteine on chronic cyclosporine A nephrotoxicity

Objective To explore the renoprotective effect of N-acetylcysteine (NAC) on chronic cyclosporine A (CsA) nephrotoxicity in mice model. Methods ICR mice were randomly divided into 4 groups: normal control group [olive oil, 1 ml/kg subcutaneous injection (s.c)], NAC control group (olive oil, 1 ml/kg s.c plus NAC 150 mg•kg-1•d-1 in drinking water), model group [ICR mice maintained on a salt-depleted diet (0.05% sodium) plus CsA (30 mg•kg-1•d-1) for four weeks]; Treatment group [ICR mice maintained on a salt-depleted diet (0.05% sodium) plus CsA (30 mg•kg-1•d-1 s.c) and NAC (150 mg•kg-1•d-1 in drinking water). Basic parameters, histopathology, 8-hydroxydeoxyguanosine (8-OHdG), the expression of Klotho and AKT-FoxO1 were studied. Results Compared with the normal control group, mice in model group showed deterioration in renal function [Scr (27.8±1.2) μmol/L vs (19.0±2.2) μmol/L, P＜0.01], development of tubulointerstitial fibrosis, increased urinary 8-OHdG output [(41.2±16.8) ng/d vs (28.7±7.4) ng/d, P＜0.05], and decreased Klotho expression [(17.8±4.5)% vs (100.0±4.0)%, P＜0.01]. Concomitant administration of NAC significantly improved all above parameters (all P＜0.05). Correlation analysis revealed that Klotho expression was negatively correlated with urinary 8-OHdG excretion (r＝-0.934, P＜0.01) and AKT-FoxO1 expression （AKT: r＝-0.939, P＜0.01; FoxO1: r＝-0.919, P＜0.01). Conclusion NAC can attenuate tubulointerstitial fibrosis in chronic CsA nephrotoxicity mice, which may be associated with the up-regulation of Klotho expression and the inhibition of AKT-FoxO1 signaling pathway.     

环磷酰胺对人腺泡状横纹肌肉瘤细胞裸鼠移植瘤生长和形态结构的影响

目的 检测环磷酰胺(cyclophosphamide,CTX)对人腺泡状横纹肌肉瘤细胞株PLA-802裸鼠移植瘤生长和形态结构的影响.方法 16只裸鼠右腋皮下接种PLA-802移植瘤细胞悬液后分成空白对照组(5只)、生理盐水对照组(5只)和20 mg/kg CTX治疗组(6只).接种后第7天开始,经腹腔注射给药,隔日1次,共注射10次.每2天测量1次肿瘤大小绘制移植瘤生长曲线.接种后第26天杀鼠摘取移植瘤称重,组织经制片染色后用光镜和电镜检查.结果 ①CTX治疗组移植瘤生长被明显抑制(P＜0.05),抑瘤率85.55%.②治疗后瘤细胞疏松排列成腺泡状,由纤维间质分隔,血管稀少;瘤细胞椭圆形、网拍状或短梭形;核椭圆或类圆形,大小不一;核分裂相减少.电镜见瘤细胞质内有不等量肌(微)丝,甚至有横纹肌肌原纤维结构形成.结论 CTX对人腺泡状横纹肌肉瘤PLA-802移植瘤生长具有一定程度的抑制作用,治疗后瘤组织形态结构改变.     

加味四逆散对皮质酮、谷氨酸致PC12细胞损伤的保护作用研究

目的:观察中药加味四逆散(Jiawei Sinisan,JWSNS)对皮质酮(corticOSterone,Cort)、谷氨酸(glutamate,Glu)致PC12细胞损伤的保护作用.方法:以100,200,400 μmol/L Cort和10,50,100 μmol/L Glu以及50,100 ml/L JWSNS含药血清分别与PC12细胞共同孵育24 h,采用倒置显微镜观察细胞形态,以甲基噻唑基四唑(methyl thiazolyl tetrazolium,MTT)法测定细胞存活率.选取200 μmol/L Cort和50 μmol/L Glu建立PC12细胞损伤模型,以MTT法观察50,100ml/L JWSNS含药血清各组对Cort和Glu所致PC12细胞损伤的保护作用.结果:不同浓度的Cort和Glu对PC12细胞的生长均具有抑制作用,随着浓度的升高,细胞损伤程度加重.各浓度的JWSNS含药血清对正常PC12细胞无毒性和不良反应.对Cort和Glu所致的PC12细胞模型,50ml/L JWSNS含药血清各组无明显抗损伤作用;Cort,Glu 100 ml/L JWSNS含药血清低、中、高各组细胞存活率分别为72.58%、87.11%、75.81%、69.35%、82.25%和70.97%,与Cort、Glu损伤模型组及正常血清组相比,细胞存活率明显升高,差异有显著性(P＜0.05,P＜0.01).结论:100ml/L JWSNS含药血清对Cort、Glu所致PC12细胞的损伤具有保护作用.