Repeated intravitreal ranibizumab for reactivated retinopathy of prematurity after intravitreal ranibizumab monotherapy: vascular development analysis

Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate the retinal vascularization of repeated intravitreal ranibizumab (IVR) for reactivated retinopathy of prematurity...     

儿童青少年高度近视眼眼底特征的研究现状

近视眼屈光度≥-6.00 D时,称为高度近视眼(HM)。HM发展出现病理改变时,称为病理性近视眼(PM)。儿童青少年HM的眼底可出现豹纹状眼底、周边视网膜变性、视盘倾斜、视盘旁区萎缩弧、脉络膜萎缩薄变、眼底微循环障碍及后巩膜葡萄肿等特征;当发展为PM时,可出现后极部脉络膜视网膜萎缩、圆顶状黄斑、近视性黄斑病变、单纯黄斑出血、脉络膜新生血管、Fuchs斑、视网膜劈裂、视网膜裂孔及视网膜脱离等改变。此前的研究主要集中在成人HM眼底改变,而对儿童青少年HM的关注较少。本文中笔者对近年来儿童青少年HM眼底改变的研究现状进行综述。     

Relationship between smoking and dyslipidemia in western Chinese elderly males

The relationship between smoking and dyslipidemia was studied in 2,160 elderly Chinese males. Levels of triglycerides (TGs) in current smokers were shown to be significantly higher and levels of high-density lipoprotein cholesterol (HDL-C) lower than for those who had never smoked or had stopped smoking. Interestingly, the level of apoprotein B (apoB) was more frequently abnormal in very heavy smokers compared with light smokers, while low-density lipoprotein cholesterol (LDL-C) levels were more frequently normal in very heavy smokers. When comparing other factors that influence blood lipids, such as alcohol intake, body mass index (BMI), and age, smoking had the greatest influence and was shown to be an independent risk factor for dyslipidemia.     

Human papillomavirus type 16 L1E7 chimeric capsomeres have prophylactic and therapeutic efficacy against papillomavirus in mice

Genital human papillomavirus (HPV) infection is the primary cause of cervical cancer in women. Although the HPV recombinant L1 protein was recently licensed as an available vaccine, it has numerous shortcomings. New vaccination strategies should be considered. To enable the design of a prophylactic and therapeutic low-cost vaccine candidate, chimeric HPV16 L1DeltaC34E7N1-60 capsomeres were produced in Escherichia coli. The immune characteristics and potential prophylactic and therapeutic effects of these capsomeres were examined in C57BL/6 mice. Following protein purification and renaturation, the majority of the recombinant chimeric proteins (L1DeltaC34E7N1-60) assembled into capsomeres. These capsomeres were able to induce conformational and neutralizing antibodies against HPV virus-like particles and trigger cell-mediated specific immune responses against the L1 and E7 peptides. In vivo tumor challenge assays showed that mice immunized with the capsomeres were protected against a challenge with both C3 and TC-1 tumor cells. Furthermore, in vivo tumor rejection assays showed that capsomeres have therapeutic efficacy in mice following inoculation with C3 and TC-1 tumor cells. Chimeric capsomeres are capable of preventing and eliminating HPV16 infection. Therefore, our study has provided an economical vaccine candidate.     

距骨骨软骨损伤的诊断及关节镜治疗

目的 总结、分析距骨骨软骨损伤的症状、体征、影像学特点、关节镜下治疗方法及手术效果.方法 2000年至2005年共收治34例距骨骨软骨损伤患者,对其临床资料包括症状、体征、X线片、MRI表现、关节镜手术方法等进行回顾性分析,术后随访根据主观和客观评分判断疗效.术前美国足踝外科后足评分平均(71±8)分,术前主观疼痛程度评分(7.5±1.3)分.结果 34例患者MRI均有骨软骨损伤征象,其中21例通过X线片检查发现距骨骨软骨损伤.距骨骨软骨损伤的主要症状为负重疼痛以及运动后加重,MRI诊断准确率较X线片高(χ2=16.07,P＜0.001).31例患者获得随访,平均随访时间为28个月.术后美国足踝外科后足评分(91±9)分,显著高于术前(t=9.147,P＜0.001);术后主观疼痛程度评分(2.4±2.3)分,显著低于术前(t=10.853,P＜0.001);临床疗效优良率为87.1%.结论 MRI检查能够提高诊断的正确率,关节镜微创手术治疗距骨骨软骨损伤效果良好.     

Effects of specific antisense oligonucleotide inhibition of Fas expression on T cell apoptosis induced by Fas ligand

To investigate the effect of specific antisense oligodeoxynucleotide (ASODN) inhibition of Fas expression on T cell apoptosis induced by hepatocarcinoma cells. Fas receptor (Fas) and Fas ligand (FasL) expressed by the hepatocarcinoma cell line HepG2.2.15 and Jurkat T cells were detected by flow cytometry (FCM) and the ability of FasL-inducing T cell apoptosis was tested by co-culture assay in vitro with HepG2.2.15 cells and Jurkat T cells. The Jurkat cells were transfected with Fas-ASODN using lipofectin, and the effects of Fas-ASODN on Fas mRNA level, Fas expression on T cells surface, and apoptosis were investigated by RT-PCR, FCM and co-culture assay, respectively. It was found that HepG2.2.15 cells expressing functional FasL could induce the apoptosis of Jurkat cells as demonstrated by co-culture assays. After the Jurkat cells were transfected with Fas ASODN, the level of Fas mRNA, the expression rate of Fas and the apoptotic rate induced by hepatocarcinoma cells were all decreased. As a conclusion, it is evident that hepatocarcinoma cells expressing FasL can induce apoptosis in Fas-expressing T cells, indicating that transfection of Fas ASODN can partially convert the immune inhibitory condition induced by hepatocarcinoma cells.     

抑制SERCA活性减缓萎缩比目鱼肌间断强直收缩张力的下降(英文)

目的确定骨骼肌收缩的舒张时程可作为判断肌质网钙离子ATP酶(SERCA)活性的功能性指标,并探讨SERCA活性对后肢去负荷大鼠萎缩比目鱼肌间断强直收缩张力下降速率的调节作用。方法采用尾部悬吊大鼠模型,游离骨骼肌肌条进行灌流,观测收缩功能的改变。结果与对照组相比,去负荷4周萎缩比目鱼肌肌条在27℃灌流条件下,间断强直收缩的舒张时程(TR75)显著缩短,强直收缩张力快速下降。相反,采用SERCA活性抑制剂环匹阿尼酸(Cyclopiazonic Acid),可延长TR75时程,并恢复强直收缩张力下降速率至对照水平。较低灌流温度(22℃)降低对照大鼠比目鱼肌SERCA活性,同时减缓强直收缩张力的下降;较高温度(35℃)则产生相反的结果。低浓度咖啡因灌流不能改变萎缩比目鱼肌强直收缩下降速率;增加灌流液Ca2+浓度和钙离子载体A23187作用下,减慢强直收缩张力下降速率。结论缩短的TR75与萎缩比目鱼肌SERCA活性增加相关联,TR75可作为表征SERCA活性的功能性指标。适度抑制SERCA活性,可能通过提高肌纤维内Ca2+浓度,减缓强直收缩张力下降速率。     

中压搪玻璃设备在制造中难题探析

搪玻璃设备广泛应用于化工、医药等行业,为满足生产工艺的要求,进行了中压搪玻璃的设计与制造。重点谈了中压搪玻璃设备在设计及制造中应该注意的几个问题。     

乙型肝炎病毒S基因经显微注射导入SMMC-7721细胞核内的表达

目的探讨细胞核显微注射导入外源基因的方法,观察HBV-S基因导入人肝癌细胞株SMMC-7721后的表达及其稳定性.方法将含有HBV-S片段的质粒pCR3.1-S线性化,通过显微注射仪直接注入培养的SMMC-7721细胞核内,G418筛选后,经EIA和免疫荧光法分别检测细胞培养上清和细胞内HBsAg的表达.结果每注射100～150个细胞可筛选出一个阳性克隆,3个阳性克隆经扩大培养后,其中1个克隆的培养上清经EIA法检测HBsAg阳性,免疫荧光显示细胞膜及细胞质均有HBsAg表达,并持续6 mo以上.结论HBV-S基因经显微注射导入SMMC-7721细胞后获得持续稳定的表达.