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China's E-commerce Operators Ready for Double 11 Shopping Festival
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作者 Ada Wang 《China's Foreign Trade》 2024年第5期39-40,共2页
With one month until November 11,all major e-commerce platforms have started their preparations for this great event.The"Double 11"shopping festival was first initiated by Alibaba in 2009and is the world'... With one month until November 11,all major e-commerce platforms have started their preparations for this great event.The"Double 11"shopping festival was first initiated by Alibaba in 2009and is the world's largest online sales gala.This shopping festival is thus named due to the date of November11 and has extended from the original24 hours to several weeks in recent years.The pre-sales stage start from late October.Some new e-commerce companies like TikTok and Pinduoduo have also been involved in the event. 展开更多
关键词 COMPANIES SHOPPING commerce
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Cross-border E-commerce Accelerates Diversely Abroad
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作者 Guo Yan 《China's Foreign Trade》 2024年第1期14-15,共2页
“Strength”and“vitality”are the comments that people in the industry have used to describe China’s cross-border e-commerce in 2023,which has been proven by the latest statistics.According to the General Administra... “Strength”and“vitality”are the comments that people in the industry have used to describe China’s cross-border e-commerce in 2023,which has been proven by the latest statistics.According to the General Administration of Customs,in 2023,the total volume of imports and exports was RMB 2.38 trillion,up by 15.6%.The volume of exports was RMB 1.83 billion,up by 19.6%,and the volume of imports was RMB 548.3 billion,up by 3.9%. 展开更多
关键词 IMPORTS BORDER commerce
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More Options B2C e-commerce is evolving rapidly in China,moving towards live commerce
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《China Report ASEAN》 2024年第5期34-38,共5页
Way back in 1999,twelve volunteers locked themselves in hotel rooms in Beijing,Shanghai,and Guangzhou to participate in a“72-hour network survival experiment.”The goal was to stay in the room for three days and surv... Way back in 1999,twelve volunteers locked themselves in hotel rooms in Beijing,Shanghai,and Guangzhou to participate in a“72-hour network survival experiment.”The goal was to stay in the room for three days and survive on an allowance from the organizer,half in cash and half in electronic form,by purchasing food,bedding. 展开更多
关键词 B2C BEDDING commerce
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The Integration of Modern Electronic Technology and E-Commerce:the Driving Force of Innovation Development
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作者 Yongchang Cai 《Journal of Educational Theory and Management》 2024年第2期6-10,共5页
In the 21st century,which is known as the age of information,the integration of electronic technology and e-commerce has become an irreversible trend in the field of business.This trend not only promotes the innovativ... In the 21st century,which is known as the age of information,the integration of electronic technology and e-commerce has become an irreversible trend in the field of business.This trend not only promotes the innovative development of e-commerce,but also brings unprecedented opportunities and challenges for enterprises.With the continuous development and popularization of Internet technology,more and more people choose to carry out shopping,payment and other consumption activities through e-commerce platforms,which also provides merchants with a broader market space and more sales channels.At the same time,e-commerce also brings more convenience and choice to consumers,making it easier for consumers to obtain the goods and services they need.However,the development of e-commerce has also brought some new challenges,such as how to ensure the quality of goods,how to protect consumer privacy and so on.Therefore,enterprises and government departments need to strengthen the supervision and management of e-commerce to ensure its healthy and orderly development.In general,the integration of electronic technology and e-commerce has become an important trend in today’s business field,which brings both opportunities and challenges to enterprises. 展开更多
关键词 Electronic technology Electronic commerce Innovation and development Driving force
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Predicting Purchasing Behavior on E-Commerce Platforms: A Regression Model Approach for Understanding User Features that Lead to Purchasing
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作者 Abraham Jallah Balyemah Sonkarlay J. Y. Weamie +2 位作者 Jiang Bin Karmue Vasco Jarnda Felix Jwakdak Joshua 《International Journal of Communications, Network and System Sciences》 2024年第6期81-103,共23页
This research introduces a novel approach to improve and optimize the predictive capacity of consumer purchase behaviors on e-commerce platforms. This study presented an introduction to the fundamental concepts of the... This research introduces a novel approach to improve and optimize the predictive capacity of consumer purchase behaviors on e-commerce platforms. This study presented an introduction to the fundamental concepts of the logistic regression algorithm. In addition, it analyzed user data obtained from an e-commerce platform. The original data were preprocessed, and a consumer purchase prediction model was developed for the e-commerce platform using the logistic regression method. The comparison study used the classic random forest approach, further enhanced by including the K-fold cross-validation method. Evaluation of the accuracy of the model’s classification was conducted using performance indicators that included the accuracy rate, the precision rate, the recall rate, and the F1 score. A visual examination determined the significance of the findings. The findings suggest that employing the logistic regression algorithm to forecast customer purchase behaviors on e-commerce platforms can improve the efficacy of the approach and yield more accurate predictions. This study serves as a valuable resource for improving the precision of forecasting customers’ purchase behaviors on e-commerce platforms. It has significant practical implications for optimizing the operational efficiency of e-commerce platforms. 展开更多
关键词 e-commerce Platform Purchasing Behavior Prediction Logistic Regression Algorithm
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Electronic Commerce Security and Risk Management: An Important Part of College Curriculum
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作者 Yongchang Cai 《Journal of Educational Theory and Management》 2024年第1期18-22,共5页
With the rapid expansion of e-commerce,its security and risk management problems become increasingly prominent.In the current business environment,the ability to understand and apply e-commerce security and risk manag... With the rapid expansion of e-commerce,its security and risk management problems become increasingly prominent.In the current business environment,the ability to understand and apply e-commerce security and risk management has become an important criterion to measure a good person.Therefore,the importance of e-commerce security and risk management courses in college education is self-evident.This course can not only help students master the basic knowledge of e-commerce,but also enable them to understand how to deal with various risks in practical work and ensure the safe operation of e-commerce.At the same time,through the study of e-commerce security and risk management,students can better understand the operation mode and law of e-commerce,and lay a solid foundation for their future career.In general,e-commerce security and risk management occupy an important position in the curriculum of colleges and universities,and play a crucial role in cultivating e-commerce professionals with practical operation ability and innovative thinking. 展开更多
关键词 Electronic commerce SECURE Risk management College curriculum
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A Certification Framework for E-Commerce Digital Competencies
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作者 Antonia Stefani Bill Vassiliadis 《Open Journal of Applied Sciences》 CAS 2023年第5期758-774,共17页
In this paper, we introduce a comprehensive certification framework for digital competencies. This framework delineates the regulations, processes, and administration necessary for executing certification of a particu... In this paper, we introduce a comprehensive certification framework for digital competencies. This framework delineates the regulations, processes, and administration necessary for executing certification of a particular subset of competencies within the DigComp framework. It stipulates distinct requisites for the methodology employed, assessment instruments, evaluation criteria, and procedures for awarding certificates. The framework encompasses the enhancement of fundamental skills, particularly digital competencies, as well as involving digitally disenfranchised demographics with technology. It can be used to evaluate and certify varying degrees of digital proficiency and to instruct individuals in utilizing essential business-to-consumer e-commerce functionalities. 展开更多
关键词 Certification System DigComp Electronic commerce
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Industrial E-commerce Develops in Full Swing
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作者 Jenny Hu 《China's Foreign Trade》 2023年第1期56-57,共2页
In 2022,the role of digital economy as a stabilizer and accelerator of the national economy was more prominent.Industry digitalization,which is driven by China’ s intelligent manufacturing,has become the main engine ... In 2022,the role of digital economy as a stabilizer and accelerator of the national economy was more prominent.Industry digitalization,which is driven by China’ s intelligent manufacturing,has become the main engine of China’ s digital economy development.As the core component of industrial digitalization,industrial e-commerce also developed in full swing.In the past three years,the COVID-19 pandemic has brought plenty of pressure to China’s industrial economy. 展开更多
关键词 plenty commerce SWING
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China's E-commerce Enterprises Tap Southeast Asian
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作者 Lily Wang 《China's Foreign Trade》 2023年第1期29-31,共3页
Driven by geographical and encouraging policy factors,Chinese e-commerce enterprises have always regarded Southeast Asia as the first stop of taking their business overseas.Although the Indonesian subsidiary of JD.com... Driven by geographical and encouraging policy factors,Chinese e-commerce enterprises have always regarded Southeast Asia as the first stop of taking their business overseas.Although the Indonesian subsidiary of JD.com announced that it would stop services on March 31,and JD.com Thailand had announced that it would be closed,the Chinese e-commerce platform Alibaba,and cross-border e-commerce operation platform TikTok Shop,said they would continue to expand businesses in Southeast Asia. 展开更多
关键词 SUBSIDIARY commerce SOUTHEAST
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Insights into B2C E-Commerce Quality Using ISO 25010
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作者 Antonia Stefani Eleni Vamvatsikou Bill Vassiliadis 《Journal of Software Engineering and Applications》 2023年第11期622-639,共18页
This paper introduces an innovative Software Quality Assurance framework tailored for B2C e-commerce systems, seamlessly integrating software quality with business objectives. Drawing from elements of the ISO 25000 se... This paper introduces an innovative Software Quality Assurance framework tailored for B2C e-commerce systems, seamlessly integrating software quality with business objectives. Drawing from elements of the ISO 25000 series and ISO 20000 standards, this framework specifically addresses challenges inherent to e-commerce. By establishing business-relevant KPIs, the framework ensures that ongoing improvement initiatives resonate with the company’s strategic goals. Additionally, the paper presents a Dynamic Bayesian Network model as a hands-on tool for implementing the framework within e-commerce organisations. 展开更多
关键词 Electronic commerce Software Quality Business to Consumer Targeted Software Design ISO 25010
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血清β-catenin、E-cadherin水平与糖尿病肾病患者钙磷代谢、颈动脉钙化的关系 被引量:1
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作者 高剑 梁铮 +2 位作者 赵飞 刘小静 马宁 《国际检验医学杂志》 CAS 2024年第12期1469-1473,共5页
目的探讨血清E-钙黏蛋白(E-cadherin)、β-连环蛋白(β-catenin)水平与糖尿病肾病患者钙磷代谢、颈动脉钙化的关系。方法选择2019年5月至2022年11月该院收治的112例糖尿病肾病患者作为研究组,并根据双侧颈动脉彩超检查结果分为颈动脉钙... 目的探讨血清E-钙黏蛋白(E-cadherin)、β-连环蛋白(β-catenin)水平与糖尿病肾病患者钙磷代谢、颈动脉钙化的关系。方法选择2019年5月至2022年11月该院收治的112例糖尿病肾病患者作为研究组,并根据双侧颈动脉彩超检查结果分为颈动脉钙化组(n=44)和非颈动脉钙化组(n=68),另选同期于该院接受体检的90例体检健康者为对照组。检测并比较各组血清E-cadherin、β-catenin及钙磷代谢水平,采用Pearson相关分析血清E-cadherin、β-catenin水平与糖尿病肾病患者钙磷代谢的关系,采用受试者工作特征(ROC)曲线评估血清E-cadherin、β-catenin对糖尿病肾病患者颈动脉钙化的预测价值,采用多因素Logistic回归分析糖尿病肾病患者颈动脉钙化的影响因素。结果研究组糖化血红蛋白、血磷、钙磷乘积、甲状旁腺激素(iPTH)、肌酐、碱性磷酸酶、β-catenin水平均高于对照组,E-cadherin水平低于对照组(P<0.05)。颈动脉钙化组血磷、血钙、钙磷乘积、iPTH、肌酐、碱性磷酸酶、β-catenin水平均高于非颈动脉钙化组,E-cadherin水平低于非颈动脉钙化组(P<0.001)。Pearson相关分析显示,糖尿病肾病患者血清E-cadherin与血磷、血钙、钙磷乘积、iPTH、肌酐、碱性磷酸酶均呈负相关(r=-0.453、-0.654、-0.365、-0.490、-0.411、-0.377,均P<0.05),血清β-catenin水平与血磷、血钙、钙磷乘积、iPTH、肌酐、碱性磷酸酶均呈正相关(r=0.444、0.345、0.421、0.398、0.651、0.622,均P<0.001)。ROC曲线分析显示,血清E-cadherin、β-catenin及二者联合预测糖尿病肾病颈动脉钙化的曲线下面积分别为0.844(95%CI 0.795~0.894)、0.853(95%CI 0.801~0.901)、0.901(95%CI 0.851~0.952)。多因素Logistic回归分析显示,血清E-cadherin(OR=3.789,95%CI 2.055~6.983)、β-catenin(OR=4.104,95%CI 1.795~9.385)、钙磷乘积(OR=2.998,95%CI 1.895~4.743)、iPTH(OR=2.713,95%CI 1.787~4.118)均是糖尿病肾病患者颈动脉钙化的影响因素(P<0.05)。结论糖尿病肾病患者β-catenin水平升高,E-cadherin水平降低,二者与患者钙磷代谢、颈动脉钙化密切相关,可作为评估糖尿病肾病患者颈动脉钙化的有效指标,同时二者联合对颈动脉钙化的预测价值更高。 展开更多
关键词 糖尿病肾病 e-钙黏蛋白 Β-连环蛋白 钙磷代谢 颈动脉钙化
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组织中MMP-9、E-cadherin与子宫内膜样癌伴MELF浸润方式及肿瘤侵袭程度的关系
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作者 李坤 王静 +2 位作者 金春亭 白睿 刘晓娟 《河北医科大学学报》 CAS 2024年第8期980-986,共7页
目的分析子宫内膜样癌组织中基质金属蛋白酶(matrix metalloproteinase,MMP)-9、E-钙黏蛋白(E-cadherin)与微囊性、伸长及碎片状(microcystic,elongation,and fragmentation,MELF)浸润方式及肿瘤侵袭程度之间的关系,探讨能够识别子宫内... 目的分析子宫内膜样癌组织中基质金属蛋白酶(matrix metalloproteinase,MMP)-9、E-钙黏蛋白(E-cadherin)与微囊性、伸长及碎片状(microcystic,elongation,and fragmentation,MELF)浸润方式及肿瘤侵袭程度之间的关系,探讨能够识别子宫内膜样癌伴MELF浸润的指标,抑制肿瘤侵袭能力。方法回顾性分析在河北北方学院附属第一医院接受手术治疗的112例子宫内膜样癌患者临床资料,全部患者均顺利完成改良根治性子宫切除术,并获得肿瘤标准,根据病理检查结果对112例患者进行分组,分为MELF组和N-MELF组。统计112例患者一般临床资料,血液检查项目包括肿瘤标志物,免疫组织化学检查项目包括组织中MMP-9、E-cadherin,根据检查结果,构建Logistic回归模型,分析组织中MMP-9、E-cadherin及相关指标与子宫内膜样癌MELF浸润方式及肿瘤侵袭程度的关系。结果研究中112例子宫内膜样癌患者,评估为MELF浸润患者21例(18.75%);MELF浸润患者病理等级低级别,国际妇产科联盟(International Federation of Gynecology and Obstetrics,FIGO)ⅣA期,淋巴脉管间隙浸润(lymphatic vascular space,LVSI)、组织中MMP-9阳性患者占比多于N-MELF浸润患者,E-cadherin阳性患者占比少于N-MELF浸润患者,人附睾蛋白(humanepididymisprotein 4,HE4),甲壳质酶蛋白(human cartilageglycopmtein,YKL-40)水平高于N-MELF患者,差异有统计学意义(P<0.05)。多元Logistic回归分析提示,组织中E-cadherin表达率低、MMP-9表达率高,MELF浸润与子宫内膜样癌FIGO分期进展有关(P<0.05)。结论子宫内膜样癌发生MELF浸润与组织中MMP-9、E-cadherin有关,MMP-9表达率高和E-cadherin表达率低能够通过导致MELF浸润发生,从而增强肿瘤侵袭能力。 展开更多
关键词 子宫内膜样癌 基质金属蛋白酶-9 e-钙黏蛋白
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血清ESM-1、E-cad对ACI-LAA溶栓后HT的预测价值
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作者 茹姗 邹婷 +2 位作者 杜磊 韩登峰 马建华 《脑与神经疾病杂志》 CAS 2024年第2期96-99,共4页
目的 探讨血清内皮细胞特异性分子-1 (ESM-1)、E-钙黏连蛋白(E-cad)对大动脉粥样硬化型脑梗死(ACI-LAA)溶栓后出血转化(HT)的预测价值。方法 选取2020年1月至2022年12月新疆医科大学第一附属医院收治的110例ACI-LAA患者,根据是否发生HT... 目的 探讨血清内皮细胞特异性分子-1 (ESM-1)、E-钙黏连蛋白(E-cad)对大动脉粥样硬化型脑梗死(ACI-LAA)溶栓后出血转化(HT)的预测价值。方法 选取2020年1月至2022年12月新疆医科大学第一附属医院收治的110例ACI-LAA患者,根据是否发生HT分为HT组和non-HT组。对比两组基础资料及血清ESM-1、E-cad水平。采用ROC曲线分析ESM-1、E-cad预测ACI-LAA患者发生HT的价值。结果 HT组患者NIHSS评分高于non-HT组,梗死面积大于non-HT组(P <0.05),HT组患者血清ESM-1、E-cad水平也高于non-HT组(P<0.05)。Logistic回归分析显示,梗死面积大、NIHSS评分高、血清ESM-1和E-cad水平升高是ACI-LAA患者发生HT的危险因素(P<0.05)。ESM-1联合E-cad预测ACI-LAA患者发生HT的曲线下面积为0.859,预测灵敏度为84.6%,特异度为72.6%。结论 血清ESM-1和E-cad水平与ACI-LAA患者HT密切相关,可作为早期预测发生HT的参考指标。 展开更多
关键词 动脉粥样硬化 脑梗死 出血转化 内皮细胞特异性分子-1 e-钙黏连蛋白
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MMP25和E-cadherin在类风湿关节炎中的诊断价值
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作者 方全钢 刘海芸 +1 位作者 万静 张水生 《江西医药》 CAS 2024年第2期143-147,154,共6页
目的探讨基质金属蛋白酶25(Matrix metalloproteinase 25,MMP25)和E-钙黏蛋白(E-cadherin)对类风湿关节炎的诊断意义。方法选取2020年1月至2023年10月我院67例类风湿关节炎患者为实验组,同期50例健康体检人群为对照组;采用酶联免疫吸附... 目的探讨基质金属蛋白酶25(Matrix metalloproteinase 25,MMP25)和E-钙黏蛋白(E-cadherin)对类风湿关节炎的诊断意义。方法选取2020年1月至2023年10月我院67例类风湿关节炎患者为实验组,同期50例健康体检人群为对照组;采用酶联免疫吸附试验(ELISA)检测二组血清中MMP25和E-cadherin蛋白水平。收集实验组患者ESR、CRP、CCP、RF、DAS28-ESR、DAS28-CRP指标,以及是否为初诊、是否合并并发症(贫血、间质性肺炎等)、病程、临床活动度等级,并与MMP25和E-cadherin水平进行相关性分析。结果实验组血清MMP25和E-cadherin水平均高于对照组,差异均有统计学意义(P<0.001)。与ESR、CRP、CCP和RF等指标进行散点图和简单线性回归性分析,结果显示:不同临床活动度患者表达MMP25水平差异有统计学意义(P<0.001),MMP25与病程(β=0.479,P<0.001),MMP25与CRP(β=0.271,P<0.05),MMP25与DAS28-ESR(β=0.660,P<0.001)和MMP25与DAS28-CRP(β=0.624,P<0.001)均有相关性。不同临床活动度患者表达E-cadherin水平差异有统计学意义(P<0.001),E-cadherin与ESR(β=0.425,P<0.001),E-cadherin与CRP(β=0.328,P<0.05),E-cadherin与DAS28-ESR(β=0.746,P<0.001),E-cadherin与DAS28-CRP(β=0.671,P<0.001)均有相关性。多重线性回归分析结果显示,MMP25表达水平与临床活动度正相关(β=1.032,P<0.001),E-cadherin表达水平与临床活动度正相关(β=0.407,P<0.05)、与病程长短正相关(β=0.497,P<0.001)。结论MMP25和E-cadherin表达水平可以作为类风湿关节炎评估临床活动度的标志物,此外,E-cadherin表达水平也可以衡量患者病程长短。 展开更多
关键词 基质金属蛋白酶25 e-钙黏蛋白 类风湿关节炎 诊断价值
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miR-200c/ZEB1/E-cadherin轴在胆管癌转移侵袭中的作用及对胆管癌预后评估的价值
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作者 潘超 许蔚 +2 位作者 刘子君 陶平 杨士勇 《现代肿瘤医学》 CAS 2024年第7期1287-1294,共8页
目的:探讨微小RNA-200c(miR-200c)/锌指转录因子(ZEB1)/E-钙黏蛋白(E-cadherin)在胆管癌(HCCA)转移、侵袭中的作用及对HCCA预后评估的临床价值。方法:选取2020年08月至2022年12月间我院收治的胆管癌患者36例为研究对象,同时选取胆管良... 目的:探讨微小RNA-200c(miR-200c)/锌指转录因子(ZEB1)/E-钙黏蛋白(E-cadherin)在胆管癌(HCCA)转移、侵袭中的作用及对HCCA预后评估的临床价值。方法:选取2020年08月至2022年12月间我院收治的胆管癌患者36例为研究对象,同时选取胆管良性疾病患者(胆总管结石或胆管良性狭窄)20例作为对照。采用原位杂交、实时荧光定量PCR检测miR-200c在HCCA患者组织及血清中的表达;生存曲线分析miR-200c表达与总生存期的相关性;Transwell实验检测细胞的迁移及侵袭能力;免疫印迹检测ZEB1及E-cadherin蛋白的表达。体内研究构建裸鼠成瘤实验,采用免疫组化检测ZEB1及E-cadherin蛋白的表达;Tunel技术检测组织中的凋亡情况。受试者工作特征(ROC)曲线评估生物标志物对胆管癌预后的诊断效能。结果:miR-200c低表达于HCCA组织及血清中;生存曲线分析显示,miR-200c表达与患者的总生存期呈正相关性,TNM分期与患者的总生存期呈负相关性;miR-200c mimics抑制了胆管癌细胞的迁移和侵袭能力,并降低ZEB1表达而诱导E-cadherin表达;转染ZEB1逆转miR-200c的作用效应,促进胆管癌细胞的迁移和侵袭特性,抑制胆管癌细胞的凋亡。CA199、CEA和miR-200c联合检测诊断胆管癌预后的ROC曲线下面积为0.892,灵敏度0.8611,特异度0.8000。结论:miR-200c/ZEB1/Ecadherin轴参与胆管癌的转移侵袭;CA199、CEA和miR-200c联合检测对胆管癌预后的诊断效能良好,对临床胆管癌的治疗策略具有重要指导价值。 展开更多
关键词 胆管癌 微小RNA-200c(miR-200c) 锌指转录因子(ZEB1) e-钙黏蛋白(e-cadherin) 迁移 侵袭
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中药砒霜上调E-钙黏蛋白抑制宫颈癌Hela细胞生长、侵袭、迁移机制研究
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作者 李思瑾 李海盈 +3 位作者 何泽阳 李安 张亚文 李道成 《新中医》 CAS 2024年第14期145-152,共8页
目的:研究中药砒霜的主要成分三氧化二砷(As_(2)O_(3))抑制宫颈癌Hela细胞生长、侵袭、迁移的机制,观察As_(2)O_(3)对宫颈癌Hela细胞组蛋白脱乙酰基酶1(HDAC1)、E-钙黏蛋白表达的影响,以及联合HDAC1抑制剂伏立诺他(SAHA)的协同作用。方... 目的:研究中药砒霜的主要成分三氧化二砷(As_(2)O_(3))抑制宫颈癌Hela细胞生长、侵袭、迁移的机制,观察As_(2)O_(3)对宫颈癌Hela细胞组蛋白脱乙酰基酶1(HDAC1)、E-钙黏蛋白表达的影响,以及联合HDAC1抑制剂伏立诺他(SAHA)的协同作用。方法:以宫颈癌Hela细胞作为载体,随机分为空白对照组、As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组4组,采用CCK-8法测定不同药物浓度对Hela细胞活性的抑制情况,并筛选后续实验药物浓度;采用Transwell法、划痕法检测各组药物对Hela细胞侵袭、迁移能力的影响;采用实时荧光定量聚合酶链式反应及蛋白免疫印迹法检测HDAC1和E-钙黏蛋白的mRNA表达情况与蛋白表达情况。结果:随着各组药物浓度增加,Hela细胞的活性逐渐降低。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组的Hela细胞活性均低于空白对照组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组穿越Transwell小室膜的细胞数量均少于空白对照组(P<0.05);As_(2)O_(3)+SAHA组的细胞数量少于As_(2)O_(3)组、SAHA组(P<0.05);As_(2)O_(3)组的细胞数量少于SAHA组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组的Hela细胞迁移百分比均低于空白对照组(P<0.05);As_(2)O_(3)+SAHA组的Hela细胞迁移百分比低于As_(2)O_(3)组、SAHA组(P<0.05);As_(2)O_(3)组的Hela细胞迁移百分比低于SAHA组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组的HDAC1 mRNA表达水平均低于空白对照组(P<0.05);As_(2)O_(3)组的HDAC1 mRNA表达水平高于SAHA组(P<0.05);As_(2)O_(3)+SAHA组的HDAC1 mRNA表达水平低于As_(2)O_(3)组、SAHA组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组的E-钙黏蛋白mRNA表达水平均高于空白对照组(P<0.05);As_(2)O_(3)+SAHA组的E-钙黏蛋白mRNA表达水平高于As_(2)O_(3)组、SAHA组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组的HDAC1蛋白表达水平均低于空白对照组(P<0.05);As_(2)O_(3)+SAHA组的HDAC1蛋白表达水平低于As_(2)O_(3)组、SAHA组(P<0.05)。As_(2)O_(3)组、SAHA组、As_(2)O_(3)+SAHA组E-钙黏蛋白的蛋白表达水平均高于空白对照组(P<0.05);As_(2)O_(3)+SAHA组E-钙黏蛋白的蛋白表达水平高于As_(2)O_(3)组、SAHA组(P<0.05)。结论:As_(2)O_(3)抑制Hela细胞的最佳浓度为8μmol/L,联合SAHA时,最佳抑制浓度为4μmol/L。As_(2)O_(3)可能通过抑制HDAC1的表达,同时促进升高E-钙黏蛋白的表达,与SAHA发挥协同作用抑制Hela细胞生长、侵袭、迁移。 展开更多
关键词 宫颈癌 HELA细胞 砒霜 三氧化二砷 伏立诺他 组蛋白脱乙酰基酶1 e-钙黏蛋白
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血清E-cadherin、VEGF、CYFRA21-1水平在甲状腺癌患者手术前后的变化及其对术后复发转移的预测价值
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作者 孙晓光 李彬 洪帅 《实用临床医学(江西)》 CAS 2024年第1期34-37,49,共5页
目的探讨血清E-钙粘连蛋白(E-cadherin)、血管内皮生长因子(VEGF)、细胞角蛋白19片段抗原21-1(CYFRA21-1)水平在甲状腺癌患者手术前后的变化及其对术后复发转移的预测价值。方法选取118例行甲状腺癌根治术的分化型甲状腺癌(DTC)患者为... 目的探讨血清E-钙粘连蛋白(E-cadherin)、血管内皮生长因子(VEGF)、细胞角蛋白19片段抗原21-1(CYFRA21-1)水平在甲状腺癌患者手术前后的变化及其对术后复发转移的预测价值。方法选取118例行甲状腺癌根治术的分化型甲状腺癌(DTC)患者为研究组,118例健康体检者为对照组;根据术后6个月复发转移情况,将DTC患者分为复发转移组33例与未复发转移组85例。比较对照组与研究组(术前)、研究组手术前后、复发转移组与未复发转移组血清E-cadherin、VEGF、CYFRA21-1水平,采用ROC曲线分析上述各指标对术后复发转移的预测价值。结果研究组血清E-cadherin水平显著低于对照组,血清VEGF、CYFRA21-1水平显著高于对照组(P<0.05);研究组术后2周血清E-cadherin水平显著高于术前,血清VEGF、CYFRA21-1水平显著低于术前(P<0.05);未复发转移组术后2周血清E-cadherin水平显著高于术后复发转移组,血清VEGF、CYFRA21-1水平显著低于术后复发转移组(P<0.05)。术后2周上述各指标联合检测预测DTC患者术后复发转移的AUC为0.862,敏感度为90.91%,特异度为75.29%。结论DTC患者术后血清中E-cadherin表达上调,VEGF、CYFRA21-1表达下调,各指标联合检测对复发转移具有较高的预测效能,可作为临床评估DTC患者术后复发转移情况的辅助指标。 展开更多
关键词 e-钙粘连蛋白 血管内皮生长因子 细胞角蛋白19片段抗原21-1 甲状腺癌 复发转移
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血清人软骨糖蛋白-39、可溶性E-选择素与儿童湿疹及严重程度的相关性
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作者 张辉 杜凡 李燕妮 《安徽医药》 CAS 2024年第11期2197-2201,共5页
目的探究血清人软骨糖蛋白-39(YKL-40)、可溶性E-选择素(E-selectin)与儿童湿疹的相关性及与湿疹严重程度的关系。方法选取2019年3月至2020年3月延安大学附属医院收治的湿疹病儿120例为观察组,根据湿疹面积及严重程度指数(EASI)评分将... 目的探究血清人软骨糖蛋白-39(YKL-40)、可溶性E-选择素(E-selectin)与儿童湿疹的相关性及与湿疹严重程度的关系。方法选取2019年3月至2020年3月延安大学附属医院收治的湿疹病儿120例为观察组,根据湿疹面积及严重程度指数(EASI)评分将病儿分为轻度组(42例)、中度组(40例)和重度组(38例)。选取同期进行体检者50例作为对照组。检测血清YKL-40、E-selectin水平;比较临床资料;采用Pearson法分析观察组YKL-40、E-selectin水平的相关性;Spearman法分析血清YKL-40、E-selectin水平与病情严重程度的相关性;logistic分析发生重度湿疹的影响因素。结果观察组年龄和性别与对照组比较均差异无统计学意义(P>0.05),而观察组病儿在过敏性鼻炎[18.33%(32/120)]、过敏史[65.00%(78/120)]、糖尿病家族史[57.50%(69/120)]、YKL-40[(38.05±4.80)g/L]和E-selectin水平[(64.12±6.83)μg/L]上与对照组[10.00%(6/50)、28.00%(14/50)、38.00%(19/50)、(24.69±3.44)g/L、(56.38±6.18)μg/L]差异有统计学意义(t/χ^(2)=4.37、19.46、5.38、17.85、6.92,P<0.05);轻度组、中度组和重度组的YKL-40[(30.95±3.51)g/L、(38.28±4.69)g/L、(45.66±6.34)g/L]和E-selectin水平[(58.82±6.05)μg/L、(63.96±6.85)μg/L、(70.15±7.68)μg/L]均依次显著升高,差异有统计学意义(F=88.67、26.71,P<0.05);观察组血清YKL-40、E-selectin呈正相关(r=0.68,P=0.001);血清YKL-40、E-selectin与病情严重程度呈正相关(r=0.68、0.58,均P<0.001);过敏史、糖尿病家族史、YKL-40和E-selectin为患湿疹严重程度的独立危险因素(P<0.05)。结论血清YKL-40和E-selectin水平升高,湿疹病儿病情可能会加重,二者均为湿疹严重程度的独立危险因素。 展开更多
关键词 湿疹 人软骨蛋白-39 可溶性e-选择素 病情严重程度
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基于XML技术的Mobile Agent在E-commerce中的应用
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作者 郑晓梅 张天 夏阳 《计算机应用研究》 CSCD 北大核心 2004年第9期219-221,共3页
首先指出电子商务技术现存的一些问题,分析了MobileAgent及XML的技术在电子商务应用中的优势,最后构建了一个基于MobileAgent电子商务模型,此模型采用ACL-XML作为其中MobileAgent的通信语言。
关键词 移动代理 ACL—XML CBB 电子商务
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一种上下文感知的E-commerce评级大数据赋权方法
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作者 齐连永 窦万春 周毓明 《上海大学学报(自然科学版)》 CAS CSCD 北大核心 2016年第1期36-44,共9页
电子商务(E-commerce)的飞速发展,产生了大量针对商品的在线评级数据,通过分析评级数据,用户可以对商品的质量进行评估.然而,评级数据的海量性和差异性使得用户难以快速而准确地评估商品的质量.鉴于此,提出一种基于E-commerce评级的上... 电子商务(E-commerce)的飞速发展,产生了大量针对商品的在线评级数据,通过分析评级数据,用户可以对商品的质量进行评估.然而,评级数据的海量性和差异性使得用户难以快速而准确地评估商品的质量.鉴于此,提出一种基于E-commerce评级的上下文感知赋权方法(context-aware weighting approach,CWA),以选出少数"重要"的评级数据并抛弃大多数"不重要"的评级数据,从而确保商品质量评估的快速性和准确性.最后,通过一组实验验证了CWA的有效性. 展开更多
关键词 e-commerce 用户评级 大数据 赋权 上下文
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