THAP11通过抑制p53的泛素化影响食管癌细胞的增殖和凋亡

目的：探讨死亡相关蛋白(thanatos-associated protein,THAP)11对食管癌细胞增殖和凋亡的影响及其潜在 的机制。方法：采用蛋白质印迹法检测人食管上皮细胞Het-1A和人食管癌细胞(Eca109,TE-1和Ec 9706)中THAP11的 表达。将食管癌TE-1细胞分为空白对照(NC)组、阴性对照(LV-LC)组、TRA P11(LV-TRA P11)组,按分组处理细胞后, 采用MTT 法检测细胞活力,流式细胞术检测细胞凋亡,caspases试剂盒检测caspase-3和caspase-9的活性。采用体外泛素 化实验检测TE-1细胞的p53泛素化水平。结果：与Het-1A细胞相比,食管癌细胞中THAP11的表达显著下降(P<0.05)。 LV-THAP11转染食管癌细胞后,细胞活力降低(P<0.05),凋亡率升高(P<0.05),caspase-3和caspase-9活性升高(P<0.05)。 THAP11能够提高食管癌细胞中p53蛋白的表达(P<0.05)。与LV-LC组相比,转染THAP11后食管癌细胞中p53的表达上调 (P<0.05),MDM2调节的p53的泛素化也被抑制。结论：THAP11通过抑制p53的泛素化抑制食管癌细胞的增殖,促进食管 癌细胞的凋亡。     

抽吸玻璃体积液联合前房注气术治疗恶性青光眼

目的:探讨抽吸玻璃体积液联合前房注气术治疗恶性青光眼的疗效.方法:采用经睫状体扁平部抽吸玻璃体积液联合前房注气术治疗7例、13眼恶性青光眼.结果:术后11眼眼压得到有效控制,前房恢复正常深度.随访3～16个月,视力＞0.3,前房及眼压均正常.结论:此种术式是治疗恶性青光眼的有效方法.     

医学生睡眠质量与焦虑抑郁情绪关系的探讨

目的 研究医学生睡眠质量与焦虑抑郁情绪的相关性,并对影响睡眠质量的有关因素进行探讨。方法 以匹慈堡睡眠质量指数（PSQI）、焦虑自评量表（SAS）、自评抑郁量表（SDS）为评价工具,采用分层整群抽样方法,调查某医学院1－4年级医学本科生睡眠障碍的发生率及分布特征。结果 医学生睡眠障碍的发生率为15．75％,男生（9．42％）女生（6．34％）间无显著性差异。19．18％的学生有抑郁情绪,男女生分别为10．10％和9．08％（P＜0．05）,15．75％的学生存在焦虑,并且10．27％的学生焦虑、抑郁情绪并存。PSQI总分与SAS、SDS得分均呈显著正相关。回归分析表明,影响PSQI总分的因素依次为睡眠效率、睡眠障碍、入睡时间、睡眠质量、日间功能、催眠质量、日间功能、催眠药物、睡眠时间。结论 焦虑、抑郁情绪是影响医学生睡眠质量的重要因素,提高医学生的心理素质,增强其适应环境的能力,对于保持良好的健康状态是十分必要的。     

青光眼滤过术后透明角膜切口白内障超声乳化摘除人工晶体植入术

介绍经透明角膜切口的青光眼滤过术后白内障超声乳化摘除人工晶体植入的方法及疗效。方法：对１８例１８眼施行手术,上方透明角膜内１ｍｍ处做３．２ｍｍ切口,。超声乳化白内障摘除后扩大切口中至５．５－６ｍｍ,植入人工晶体。结果１８眼术后视力全部提高,术中术后无严重并发症。     

McAb共刺激PBLs淋巴细胞在培养体系中的状态及超微结构的 …

通过用抗ＣＤ３,ＣＤ２８＋ＣＤ８０ ＭｃＡｂ激活健康人的ＰＢＬｓ,并以ＰＨＡ,ＩＬ－２,ＰＢＬｓ为对照组;对各组不同时间段的淋巴细胞超微结构进行观察。结果提示：ＣＤ３及ＣＤ２８＋ＣＤ８０刺激淋巴细胞增殖外,也能使淋巴细胞活化,细胞表现为胞体增大,细胞器增多,具有粗大的绒毛和突出伪足,并可见单核细胞吞噬活跃。     

聚氯乙烯膜盐酸奎宁选择电极的研制与应用

目的及方法 :本文首次使用鞣酸与六价铬形成的络合物为沉淀剂 ,使其与奎宁形成的分子缔合物为电活性物 ,制备了一种新型的 PVC膜盐酸奎宁选择电极。结果 :电极的 Nernst响应范围为 1.0× 10 - 1～ 1.0× 10 - 5 mol/ L;斜率为 5 3m V/ p C;检测限为 7.0× 10 - 6 mol/ L。结论 :此电极响应迅速 ,重现性好 ,用此电极以标准曲线法对药物中的盐酸奎宁进行了测定 ,操作简便 ,结果与药典法相符     

Characterization and phylogenetic analysis of a neurovirulent Zika virus isolated from Cambodia in 2019

The geographic range of Zika virus (ZIKV) has expanded from Asia to the Americas, leading to the 2015–2016 pandemic with enhanced neurovirulence. At present, ZIKV is continuously circulating in many Southeast Asian countries. Unfortunately, the persistent evolution of ZIKV in Southeast Asia and its influence on the biological characteristics of the virus remain incompletely understood. In this study, the in vitro and in vivo properties of a new ZIKV isolate obtained from Cambodia in 2019 (CAM/2019) were characterized and compared with those of the Cambodian strain (CAM/2010). Compared with CAM/2010, the CAM/2019 virus showed similar plaque morphology and growth curves in cell cultures and induced comparable viremia and organ viral loads profiles in both BALB/c and A129 (IFNAR1^−/−) mice upon intraperitoneal (i.p.) inoculation. Remarkably, the CAM/2019 virus exhibited enhanced neurovirulence in neonatal mice compared with CAM/2010, with a 74-fold reduction in the 50% lethal dose (LD₅₀). Consistently, CAM/2019 produced higher viral loads in the brains of BALB/c neonatal mice than CAM/2010 did. Sequence alignment showed that the CAM/2019 virus has acquired 12 amino acid substitutions, several of which were found to be associated with neurovirulence. In particular, the CAM/2019 virus shared an A1204T substitution in NS2A with the Thai isolate SI-BKK02 that was isolated from a microcephaly case. Taken together, our results indicate that a ZIKV strain isolated with specific mutations has emerged in Cambodia, highlighting the need for extensive molecular and disease surveillance in Cambodia and other Asian countries.     

The acceptance of SARS-CoV-2 rapid antigen self-testing: A cross-sectional study in China

Compared with the nucleic acid amplification test (NATT), the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) rapid antigen self-testing (RAST) has advantages in speed and convenience. However, little is known about people's acceptance and influencing factors for SARS-CoV-2 RAST. A cross-sectional study was conducted from April 21 to 30, 2022 in China. The χ² test and multivariate logistic regressions were used to identify the influencing factors. The structural equation model was used to test the extended protective motivation theory (PMT) model hypotheses. Among the total of 5107 participants, 62.5% were willing to accept the SARS-CoV-2 RAST. There were significant differences in acceptance among different residences (p < 0.001), educational level (p < 0.001), occupation (p < 0.001), monthly income (p < 0.001), travel frequency (p < 0.05), and feelings about NATT (p < 0.001). Response efficacy (β = 0.05; p = 0.025) and self-efficacy (β = 0.84; p < 0.001) had a positive effect, while response cost showed a negative effect (β = −0.07; p < 0.001). The public's major concerns about SARS-CoV-2 RAST are its reliability, testing method, price, and authority. Overall, a moderate intention to use SARS-CoV-2 RAST was found among the Chinese population. The extended PMT can be used for the prediction of intention to accept the RAST. We need to take measures to increase people's acceptance of SARS-CoV-2 RAST.     

99mTc—DTPA—甲硝唑正常动物体内分布研究

目的：探讨＾９９ｍＴｃ－ＤＴＰＡ－甲硝唑在正常动物的体内分布。方法：经小鼠和家兔耳缘静脉注射＾９９ｍＴｃ－ＤＰＴＡ－甲硝唑（３．７ＭＢｑ）后５ｍｉｎ２４ｈ,连续采集血液和其它脏器标本,测其放射性。结果：＾９９ｍＴｃ－ＤＴＰＡ－甲硝唑正常小鼠生物分布除肝脏、肾脏外,其余器官无明显分布。家兔血液清除研究在血中清除快,在血中呈双指数下降Ｔ１／２α为０．４５ｈ,Ｔ１／２β为３．１８ｈ。结论：＾９９ｍＴｃ－     

PEG6000沉淀结合差速离心方法浓缩水中脊髓灰质炎病毒

建立一种简便,有效的从细菌培养物中纯化ＰＶ１病毒的方法用于水病毒消毒实验。方法ＰＶ１Ｈｅｎａｎ株在Ｈｅｐ－２细胞中增殖后用聚乙二醇６０００沉淀结合差速离心的方法纯化病毒,ＲＴ－ＰＣＲ和透射电镜鉴定提纯病毒的形态学和分子生物学特性。结论ＰＥＧ６０００结合差速离心的方法较之蔗糖密度梯度区带离方法易于操作且比单独ＰＥＧ沉淀有更高的纯化系数,是一种简便,有效的方法。