影响原发性肝癌介入治疗生存因素的Cox模型分析

目的：了解三种介入治疗方法对原发肝癌生存因素的影响。方法：应用Ｃｏｘ回归模型对２９８例不能切除的原发性肝癌介入治疗后的预后进行多因素分析。结果：２３项指标中筛选出对生存影响显著的６项因素。按其对生存影响的大小排列分别为：肿瘤大小、二步切除、肿瘤数目、动静脉瘘、门脉癌栓和介入次数。结论：二步切除和介入次数为保护因子，能延长生存期。其余４项为危险因子，可缩短生存期。     

冠状动脉粥样硬化性心脏病患者心外膜脂肪组织的生物信息学研究

背景 心血管疾病（CVD）是常见病和多发病,患病率和死亡率呈快速上升趋势。动脉粥样硬化（AS是缺血性CVD的病理基础,研究表明心外膜脂肪组织（EAT）通过分泌外泌体（EXO）和生物活性物质促进AS进展,但其作用机制仍需进一步研究。目的 通过生物信息学方法挖掘冠状动脉粥样硬化性心脏病（CAD）患者EAT中的关键基因,探讨免疫细胞浸润情况,联合CAD患者EXO间差异表达基因（DEGs）推测EAT来源EXO间DEGs并进行验证,从细胞及分子水平上探讨EAT在CAD疾病过程中的作用机制。方法 从基因表达综合数据库（GEO）中下载关于EAT的数据集GSE64554、GSE120774,根据临床信息将EAT的测序数据分为CAD组和健康对照组,使用R语言及相关软件包进行生物信息学分析。首先使用R语言筛选CAD组与健康对照组EAT间DEGs,并进行GO富集分析和KEGG通路富集分析,构建蛋白质-蛋白质相互作用（PPI）网络,评估所选基因的生物学功能及可能参与其调控的转录因子。构建GSE64554数据集中EAT的加权基因共表达网络（WGCNA）,获取同CAD表型相关的基因模块,将所获EAT间DEGs与模...     

基于太赫兹时域光谱技术的名贵动物药材龟甲的真伪品鉴别

目的： 建立一种利用太赫兹时域光谱和多种化学计量学方法鉴别龟甲真伪的新方法。方法： 选用正品乌龟和伪品红耳彩龟的腹甲进行实验,先用经典的性状鉴别、显微鉴别方法比较两种样品的典型性状特征,后利用太赫兹时域光谱仪测得样品的光谱信息,对样品谱图进行平滑处理和基线校准,并运用化学计量方法进行数据分析以区分正品和伪品龟甲。结果： 性状鉴别结果显示完整正、伪品龟甲样品仅有细微差异,且其碎片或粉末基本无差异;显微鉴别未在两种样品中发现明显的特征差异性结构;两种样品的太赫兹时域光谱曲线图经快速傅里叶变换滤波器平滑滤波处理、正交偏最小二乘法判别分析处理后呈现显著差异。结论： 利用太赫兹时域光谱技术结合正交偏最小二乘法判别分析可以实现龟甲真伪品的精准鉴别。     

基于中医五辨思维辨识火郁证

感染性发热归属于中医学火热证范畴,火热证的病机大多为阳气怫郁、阻遏于内,这种因郁而作的发热,称为火郁证。运用五辨（辨病、辨症、辨证、辨人、辨机）思维辨识火郁证,对火郁证的发病特点及规律进行概括,可把握火郁证的内在发病机制,有助于全面而深刻地理解感染性发热。     

An Environmental Dilemma for China During the COVID-19 Pandemic: The Explosion of Disposable Plastic Wastes

Plastic pollution control has been on top of the political agenda in China. In January 2020, China announced a phased ban on the production and usage of various types of single-use plastics as a solution to environmental pollution problems. However, the outbreak of COVID-19 seems to be a new obstacle to the ban on single-use plastic products. To basically satisfied the daily necessities and contain the spread of SARS-CoV-2 under the background of the regular epidemic prevention and control in China, online ordering, contactless delivery and wearing mask have become an important and feasible way of daily life. However, the unrestrained use of disposable plastic bags, lunch boxes and masks within the nationwide quarantine leads to hundreds of millions of plastics wastes every day. The potential environmental pollution caused by the use of disposable plastic products during the pandemic should arouse social concern. The Chinese government should manage environmental protection in parallel with anti-pandemic endeavors as the situation of the pandemic evolves.

     

利用流式细胞术研究榄香烯对肝癌腹水瘤细胞系Hca—F25／CL—1 …

采用小鼠肝癌腹水瘤细胞系Ｈｃａ－Ｆ２５／ＣＬ－１６Ａ３,利用流式细胞术研究了榄香烯对肿瘤细胞的作用,对Ｈｃａ－Ｆ２５／Ｃｌ－１６Ａ３细胞周期的影响、ＤＮＡ含量的分析以诱导细胞凋亡。结果表明：榄香烯可以明显抑制Ｈｃａ－Ｆ２５／ＣＬ－１６Ａ３细胞的增殖,有效地杀伤肿瘤细胞;榄香烯对ＣＯ／ＧＩ期细胞无明显作用,主要作用于Ｓ期,阻止由Ｓ期进入Ｇ２／Ｍ期,从而抑制肿瘤生长;可以ＧＯ／ＧＩ期前出现一个凋亡特异     

Polymorphisms in XPD exons 10 and 23 and bladder cancer risk.

INTRODUCTION: The nucleotide excision repair gene, xeroderma pigmentosum complementation group D (XPD), has been hypothesized to have a role in cancer risk, but results from prior molecular epidemiologic studies and genotype-phenotype analyses are conflicting. MATERIALS AND METHODS: We examined the frequency of the XPD Asp312Asn polymorphism in exon 10 and the XPD Lys751Gln polymorphism in exon 23 in 505 incident bladder cancer cases and 486 healthy controls. RESULTS: Overall, the XPD exon 10 and 23 genotypes were not associated with bladder cancer risk, after adjusting for age, sex, ethnicity, and smoking status. A gender-specific role was evident that showed an increased risk for women, but not for men, associated with the variant genotypes for both exons. For example, when the exon 23 variant allele genotypes were combined (Lys/Gln + Gln/Gln), there was an increased bladder cancer risk in women [odds ratio (OR), 1.69; 95% confidence interval (95% CI), 1.12-2.58] but not in men (OR, 0.99; 95% CI, 0.79-1.24; P(interaction) = 0.041; OR, 1.62; 95% CI, 1.02-2.58). There was also a gene-smoking interaction that showed the variant alleles for either exon or the combination of both increase the risk of bladder cancer for light and heavy smokers. For exon 23 (P(interaction) = 0.057; OR, 1.21; 95% CI, 0.99-1.47), heavy smokers (> or = 20 pack-years) who carried the exon 23 variant allele genotypes had an OR of 4.13 (95% CI, 2.53-6.73), whereas heavy smokers with the wild-type genotypes were at lower risk (OR, 3.55; 95% CI, 2.19-5.75). Moderate smokers (1-19 pack-years) with the variant allele genotypes had an OR of 1.54 (95% CI, 0.94-2.53), whereas moderate smokers with the wild-type genotypes had an OR of 1.12 (95% CI, 0.63-1.98). CONCLUSIONS: Although we did not observe main effects associated with the XPD genotypes, these results do suggest the variant allele genotypes were associated with increased bladder cancer risk in women and smokers with statistically significant interactions in the exon 23 polymorphism. Although there is biological plausibility, these novel findings for gender and smoking should be interpreted with caution upon confirmation in larger studies.     

药品检验机构实验室安全手册编写探讨

目的:为药品检验机构实验室安全手册编写及贯彻执行提供建设性意见.方法:突出强调编写实验室安全手册的目的与意义,阐述编写的基本原则,详细分析手册的框架和内容,并提出助推手册执行的措施与建议.结果 与结论:秉持"以人为本"的宗旨,建立适合本单位实际情况的实验室安全手册,从使用者的角度提出做好自身防护的措施,明确安全操作规范...     

诱导子对丹参有效成分次生代谢的诱导与调控

诱导子被认为是提高药用植物次生代谢产物最有效的方法之一,为当前研究的热点.生物和非生物诱导子对丹参有效成分次生代谢具有诱导和调控作用.作者介绍了诱导子对丹参的诱导、调控机制等方面的研究进展.