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创伤性脊髓损伤急性期前列腺素E1对血管相关因子的调节和微循环功能的保护
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作者 王荣荣 黄玉珊 +1 位作者 李湘淼 白金柱 《中国组织工程研究》 CAS 北大核心 2025年第5期958-967,共10页
背景:前列腺素E1被证明在血管扩张、炎症、白细胞迁移和黏附中发挥调节作用,但其对创伤性脊髓损伤后脊髓微循环的作用尚缺乏深入的研究。目的:探讨在大鼠创伤性脊髓损伤急性期给予前列腺素E1对血管相关因子的调节和微循环功能的保护作... 背景:前列腺素E1被证明在血管扩张、炎症、白细胞迁移和黏附中发挥调节作用,但其对创伤性脊髓损伤后脊髓微循环的作用尚缺乏深入的研究。目的:探讨在大鼠创伤性脊髓损伤急性期给予前列腺素E1对血管相关因子的调节和微循环功能的保护作用机制。方法:将72只雌性SD大鼠随机分为3组(n=24),即假手术组、脊髓损伤组、前列腺素E1组。后两组用Allen’s打击法建立脊髓损伤的体内模型,前列腺素E1组大鼠在脊髓损伤后15 min内立即尾静脉注射脂质前列腺素E110μg/kg。分别在损伤后2,24 h测定脊髓微循环血流量和血氧饱和度、脊髓微血管直径和面积、脊髓含水量、血管功能调节因子(血浆血管性血友病因子、血栓素A2、前列环素、内皮素1)和炎症因子(肿瘤坏死因子α、白细胞介素1β)的表达。结果与结论:①脊髓损伤后2 h,前列腺素E1组大鼠的脊髓微血管直径及面积、脊髓微循环血流量和血氧饱和度均高于脊髓损伤组(P<0.05),脊髓含水量低于脊髓损伤组(P<0.05),血浆血管性血友病因子、脊髓组织血栓素A2/前列环素及内皮素1质量浓度均低于脊髓损伤组(P<0.05);②脊髓损伤后24 h,前列腺素E1组大鼠的脊髓微血管面积、血流量和血氧饱和度均高于脊髓损伤组(P<0.05),脊髓含水量低于脊髓损伤组(P<0.05),血浆血管性血友病因子、脊髓组织血栓素A2/前列环素及内皮素1、肿瘤坏死因子α、白细胞介素1β的质量浓度均低于脊髓损伤组(P<0.05);③脊髓损伤组大鼠损伤后24 h的脊髓微血管直径及面积、脊髓微循环血流量和血氧饱和度均高于损伤后2 h(P<0.05),血浆血管性血友病因子、脊髓组织血栓素A2/前列环素、肿瘤坏死因子α、白细胞介素1β的质量浓度均高于损伤后2 h(P<0.05),但是脊髓组织内皮素1质量浓度低于损伤后2 h(P<0.05);④前列腺素E1组大鼠损伤后24 h的脊髓微循环血流量和血氧饱和度低于损伤后2 h(P<0.05),脊髓微血管直径及面积、脊髓含水量高于损伤后2 h(P<0.05);⑤以上结果表明,脊髓损伤大鼠伤后即刻静脉给予前列腺素E1,可调节血管功能调节因子、炎症因子并改善脊髓损伤后脊髓微循环,这为寻找治疗急性脊髓损伤的药物提供了潜在的基础。 展开更多
关键词 脊髓损伤 前列腺素e1 脊髓微循环 微循环障碍 炎症因子 血管功能调节因子
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Renewal Design of Marketplace Culture Spaces in Traditional Blocks Based on Catalyst Theory: A Case Study of Pengzhen Town in Shuangliu District of Chengdu 被引量:1
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作者 NIE Kangcai ZHOU Xuehong 《Journal of Landscape Research》 2019年第4期10-13,18,共5页
In this study, three kinds of spaces with different marketplace atmospheres, namely, the tea-drinking space, the commercial space and the courtyard space, are created with the aid of the marketplace culture characteri... In this study, three kinds of spaces with different marketplace atmospheres, namely, the tea-drinking space, the commercial space and the courtyard space, are created with the aid of the marketplace culture characteristics of the local blocks in Pengzhen Town and the catalyst theory, so as to achieve the purpose of activating the traditional blocks in Pengzhen Town. The design takes the marketplace culture as the entry point and the most vigorous points as the catalyst points to create a living space with strong marketplace flavor, thereby activating the economic and social activities of the traditional block and promotes the sustainable renewal of the cultural space. 展开更多
关键词 CATALYST THeORY Traditional DISTRICT marketplace CULTURe ReNeWAL design
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COVID‑19 pandemic risk and probability of loan default:evidence from marketplace lending market 被引量:1
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作者 Asror Nigmonov Syed Shams 《Financial Innovation》 2021年第1期1967-1994,共28页
As the COVID-19 pandemic adversely affects the financial markets,a better understanding of the lending dynamics of a successful marketplace is necessary under the conditions of financial distress.Using the loan book d... As the COVID-19 pandemic adversely affects the financial markets,a better understanding of the lending dynamics of a successful marketplace is necessary under the conditions of financial distress.Using the loan book database of Mintos(Latvia)and employing logit regression method,we provide evidence of the pandemic-induced exposure to default risk in the marketplace lending market.Our analysis indicates that the probability of default increases from 0.056 in the pre-pandemic period to 0.079 in the post-pandemic period.COVID-19 pandemic has a significant impact on default risk during May and June of 2020.We also find that the magnitude of the impact of COVID-19 risk is higher for borrowers with lower credit ratings and in countries with low levels of FinTech adoption.Our main findings are robust to sample selection bias allowing for a better understanding of and quantifying risks related to FinTech loans during the pandemic and periods of overall economic distress. 展开更多
关键词 Peer-to-peer lending COVID-19 CORONAVIRUS Default risk marketplace lending PANDeMIC FinTech Shadow banking
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关于韩国企业间电子交易市场(e-marketplace)发展原因的研究
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作者 安宗洙 《辽东学院学报(社会科学版)》 2005年第5期53-59,共7页
电子商务的发展,促使电子交易市场领域不断的拓展。通过对韩国企业间电子交易市场现状的调查研究,分析B2B电子交易市场的各个成长阶段,给出各阶段的理论性假设结论,找出影响市场发展的原因和对应策略。
关键词 电子商务 韩国 企业 电子交易市场 调查研究 影响因素
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Correlations of the expression of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in colon cancer tissues
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作者 Rong-Gang Luan Ming-Da Liu +9 位作者 Zi-Feng Deng Cong-Lan Lu Mei-Ling Yu Ming-Yu Zhang Rong Liu Ran An You-Liang Yao Dong-Bei Guo Yong-Xing Zhang Lei Zhao 《World Journal of Gastrointestinal Oncology》 SCIE 2025年第1期207-213,共7页
BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ubiquitination.Conversely,reduced expression result... BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ubiquitination.Conversely,reduced expression results in a loss of this capacity to facilitate cyclin E degradation.The ubiquitination and degradation of cyclin E1 may be associated with phosphorylation at specific sites on the protein,with Cx43 potentially enhancing this process by facilitating the phosphorylation of these critical residues.AIM To investigate the correlation between expression of Cx43,SKP1/Cullin1/F-box(SCF)FBXW7,p-cyclin E1(ser73,thr77,thr395)and clinicopathological indexes in colon cancer.METHODS Expression levels of Cx43,SCFFBXW7,p-cyclin E1(ser73,thr77,thr395)in 38 clinical colon cancer samples were detected by immunohistochemistry and were analyzed by statistical methods to discuss their correlations.RESULTS Positive rate of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in detected samples were 76.32%,76.32%,65.79%,5.26%and 55.26%respectively.Positive expressions of these proteins were not related to the tissue type,degree of tissue differentiation or lymph node metastasis.Cx43 and SCFFBXW7(r=0.749),p-cyclin E1(Ser73)(r=0.667)and p-cyclin E1(Thr395)(r=0.457),SCFFBXW7 and p-cyclin E1(Ser73)(r=0.703)and p-cyclin E1(Thr395)(0.415)were correlated in colon cancer(P<0.05),and expressions of the above proteins were positively correlated in colon cancer.CONCLUSION Cx43 may facilitate the phosphorylation of cyclin E1 at the Ser73 and Thr195 sites through its interaction with SCFFBXW7,thereby influencing the ubiquitination and degradation of cyclin E1. 展开更多
关键词 Colon cancer CX43 SCFFBXW7 Phosphorylation of cyclin e1 Sites of cyclin e1 Correlation analysis
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An efficient electronic marketplace bidding auction protocol with bid privacy
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作者 Hyeong Seon Yoo 《重庆邮电大学学报(自然科学版)》 2007年第3期372-376,共5页
The multi-agent negotiation test-bed proposed by Collins was modified. It utilizes publish/subscribe system, time-release cryptography and anonymous communication. The proposed protocol reduces DOS attack and avoids r... The multi-agent negotiation test-bed proposed by Collins was modified. It utilizes publish/subscribe system, time-release cryptography and anonymous communication. The proposed protocol reduces DOS attack and avoids replay data attack by providing ticket token and deal sequence number to the supplier. And it is proved that generating random number to the supplier by market is better than the supplier doing it by him in guaranteeing anonymity. Market publishes an interpolating polynomial for sharing the determination process data. It avoids collusion between a customer and a certain supplier. According to the comparison and analysis with other protocols, the proposed protocol shows good security and better efficiency. 展开更多
关键词 多级代理市场 拍卖协议 拒绝服务攻击 询价单 计算机安全
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Clinical,laboratory,and therapeutic differences between immunoglobulin E-mediated and non-immunoglobulin E-mediated cow’s milk protein allergy in children
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作者 Hasan M Isa Marwa J Abdulnabi +4 位作者 Nawra S Naser Fatema N Lahmda Noor M AlAnsari Zahra H Isa Afaf M Mohamed 《World Journal of Clinical Pediatrics》 2025年第1期78-92,共15页
BACKGROUND Although breast milk is ideal for newborns,in some cases,it is replaced with cow’s milk,which contains proteins that increase the risk of cow’s milk protein allergy(CMPA).AIM To evaluate CMPA prevalence i... BACKGROUND Although breast milk is ideal for newborns,in some cases,it is replaced with cow’s milk,which contains proteins that increase the risk of cow’s milk protein allergy(CMPA).AIM To evaluate CMPA prevalence in Bahrain and compare clinical characteristics of children with immunoglobulin E(IgE)-and non-IgE-mediated CMPA.METHODS This retrospective cohort study examined children with CMPA diagnosed at the pediatric gastroenterology outpatient clinic of the Salmaniya Medical Complex,Bahrain,between 2014 and 2022,and assessed CMPA prevalence.Clinical presentations,laboratory findings,dietary modifications,and outcomes were compared between children with IgE-mediated and non-IgE-mediated CMPA.Categorical variables were compared using Fisher’s exact test or Pearson’sχ2 test,whereas continuous variables were compared using Student’s t-test or the Mann-Whitney U test.RESULTS Of 8332 patients,6022(72.3%)adhered to their appointment.Of them,618(10.3%)were suggested of having CMPA and 595(96.3%)were included;CMPA prevalence was 2%.Most patients were Bahraini(93.8%)and males(55.3%).Non-IgE-mediated type accounted for 77.3%cases and IgE-mediated type,22.7%.IgE-mediated CMPA presented more in boys(P=0.030),and later in life(5.1 months±4.5 months vs 4.2 months±4.2 months,P=0.016,95%CI:0.08-1.73),had more associated diseases(P<0.001);and presented with more cutaneous(P=0.024)and respiratory(P=0.003)manifestations,severe symptoms[rash/dry skin(P=0.031),facial swelling/angioedema(P=0.003),failure to thrive(P=0.013),apparent life-threatening event(P<0.001)],and positive physical findings(P=0.002)than non-IgE-mediated CMPA.Most patients were exclusively fed cow milk formula(50.3%).The amino acid-based formula(AAF)was most prescribed(60.5%)with no difference between the two types(P=0.173).Although breastfeeding was recommended to 49.6%,only 8.2%were exclusively breastfed.IgE-mediated CMPA was associated with a longer follow-up duration than non-IgE-mediated CMPA(17.3 months±14.0 months vs 13.5 months±13.4 months,P=0.005,95%CI:1.1-6.3).CONCLUSION This study revealed a high CMPA prevalence with clinical differences between both types that can influence treatment.AAF was most prescribed,while breastfeeding with dietary modification is rarely applied. 展开更多
关键词 CHILDReN Milk allergy Immunoglobulin e BReASTFeeDING Infant formula Bahrain
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Q550E高强钢及焊接接头的疲劳裂纹扩展研究
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作者 马亚飞 程尔祥 +2 位作者 吴显顺 何羽 王磊 《土木与环境工程学报(中英文)》 北大核心 2025年第1期142-151,共10页
焊接构造是钢桥的薄弱部位,在反复车辆荷载作用下,疲劳损伤正逐步成为影响桥梁服役安全的关键问题之一。以Q550E高强钢为研究对象,开展母材和对接焊缝接头的静力拉伸和疲劳裂纹扩展试验,建立母材及焊接连接件的疲劳裂纹增长模型,揭示了... 焊接构造是钢桥的薄弱部位,在反复车辆荷载作用下,疲劳损伤正逐步成为影响桥梁服役安全的关键问题之一。以Q550E高强钢为研究对象,开展母材和对接焊缝接头的静力拉伸和疲劳裂纹扩展试验,建立母材及焊接连接件的疲劳裂纹增长模型,揭示了应力比对高强钢焊接节点疲劳裂纹扩展速率的影响规律;开展基于FRANC3D和ABAQUS的联合仿真模拟分析,通过敏感性分析明确关键影响参数。结果表明:随着应力比的增大,疲劳裂纹扩展速率参数m增大、lg C减小,应力强度因子门槛值减小;对接焊缝m值约为母材的2倍,对接焊缝裂纹门槛值大于母材,且对应力比更敏感;联合仿真方法可准确预测高强钢焊接接头疲劳寿命,高应力比下试件厚度和初始裂纹深度对疲劳扩展影响显著。 展开更多
关键词 桥梁工程 Q550e高强钢 焊接接头 疲劳裂纹 有限元分析
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Cohort study on the treatment of BRAF V600E mutant metastatic colorectal cancer with integrated Chinese and western medicine
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作者 Jiang-Yu Bian Yu-Fang Feng +1 位作者 Wen-Ting He Tong Zhang 《World Journal of Clinical Oncology》 2025年第1期25-33,共9页
BACKGROUND Patients with BRAF V600E mutant metastatic colorectal cancer(mCRC)have a low incidence rate,poor biological activity,suboptimal response to conventional treatments,and a poor prognosis.In the previous cohor... BACKGROUND Patients with BRAF V600E mutant metastatic colorectal cancer(mCRC)have a low incidence rate,poor biological activity,suboptimal response to conventional treatments,and a poor prognosis.In the previous cohort study on mCRC conducted by our team,it was observed that integrated Chinese and Western medicine treatment could significantly prolong the overall survival(OS)of patients with colorectal cancer.Therefore,we further explored the survival benefits in the population with BRAF V600E mutant mCRC.AIM To evaluate the efficacy of integrated Chinese and Western medicine in the treatment of BRAF V600E mutant metastatic colorectal cancer.METHODS A cohort study was conducted on patients with BRAF V600E mutant metastatic colorectal cancer admitted to Xiyuan Hospital of China Academy of Chinese Medical Sciences and Traditional Chinese Medicine Hospital of Xinjiang Uygur Autonomous Region from January 2016 to December 2022.The patients were divided into two cohorts.RESULTS A total of 34 cases were included,with 23 in Chinese-Western medicine cohort(cohort A)and 11 in Western medicine cohort(cohort B).The median overall survival was 19.9 months in cohort A and 14.2 months in cohort B,with a statistically significant difference(P=0.038,hazard ratio=0.46).The 1-3-year survival rates were 95.65%(22/23),39.13%(9/23),and 26.09%(6/23)in cohort A,and 63.64%(7/11),18.18%(2/11),and 9.09%(1/11)in cohort B,respectively.Subgroup analysis showed statistically significant differences in median OS between the two cohorts in the right colon,liver metastasis,chemotherapy,and first-line treatment subgroups(P<0.05).CONCLUSION Integrated Chinese and Western medicine can prolong the survival and reduce the risk of death in patients with BRAF V600E mutant metastatic colorectal cancer,with more pronounced benefits observed in patients with right colon involvement,liver metastasis,combined chemotherapy,and first-line treatment. 展开更多
关键词 Metastatic colorectal cancer BRAF V600e mutation Integrated Chinese and Western medicine Cohort study
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Liver as a new target organ in Alzheimer's disease:insight from cholesterol metabolism and its role in amyloid-beta clearance
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作者 Beibei Wu Yuqing Liu +4 位作者 Hongli Li Lemei Zhu Lingfeng Zeng Zhen Zhang Weijun Peng 《Neural Regeneration Research》 SCIE CAS 2025年第3期695-714,共20页
Alzheimer's disease,the primary cause of dementia,is characterized by neuropathologies,such as amyloid plaques,synaptic and neuronal degeneration,and neurofibrillary tangles.Although amyloid plaques are the primar... Alzheimer's disease,the primary cause of dementia,is characterized by neuropathologies,such as amyloid plaques,synaptic and neuronal degeneration,and neurofibrillary tangles.Although amyloid plaques are the primary characteristic of Alzheimer's disease in the central nervous system and peripheral organs,targeting amyloid-beta clearance in the central nervous system has shown limited clinical efficacy in Alzheimer's disease treatment.Metabolic abnormalities are commonly observed in patients with Alzheimer's disease.The liver is the primary peripheral organ involved in amyloid-beta metabolism,playing a crucial role in the pathophysiology of Alzheimer's disease.Notably,impaired cholesterol metabolism in the liver may exacerbate the development of Alzheimer's disease.In this review,we explore the underlying causes of Alzheimer's disease and elucidate the role of the liver in amyloid-beta clearance and cholesterol metabolism.Furthermore,we propose that restoring normal cholesterol metabolism in the liver could represent a promising therapeutic strategy for addressing Alzheimer's disease. 展开更多
关键词 ABCA1 Alzheimer's disease AMYLOID-BeTA apolipoprotein e cholesterol metabolism LIVeR liver X receptor low-density lipoprotein receptor-related protein 1 peripheral clearance tauroursodeoxycholic acid
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Rising incidence of acute hepatitis A among adults and clinical characteristics in a tertiary care center of Pakistan
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作者 Yumna Shahid Amna Subhan Butt +1 位作者 Iqra Jamali Faisal Wasim Ismail 《World Journal of Virology》 2025年第1期73-82,共10页
BACKGROUND For decades,hepatitis A virus(HAV)has been a leading cause of acute hepatitis among children and was less prevalent among adults.However,recently a paradigm shift has been observed in the epidemiology of HA... BACKGROUND For decades,hepatitis A virus(HAV)has been a leading cause of acute hepatitis among children and was less prevalent among adults.However,recently a paradigm shift has been observed in the epidemiology of HAV,as evident by cases of acute hepatitis due to HAV among adults.AIM To estimate frequency of HAV in acute viral hepatitis and compare characteristics in HAV and hepatitis E virus(HEV)infection.METHODS This was a trend analysis conducted at Aga Khan University Hospital Karachi(Sindh,Pakistan)from February 2024 to May 2024.Individuals aged 18 years and older diagnosed with acute viral hepatitis attributed to hepatotropic viruses in 2024 were reviewed.To compare the trend patients admitted with acute hepatitis during 2019-2023 were also reviewed.Data regarding clinical and laboratory parameters were recorded.The yearly trend of acute hepatitis due to HAV and HEV was analyzed,and comparative analysis was done between HAV and HEV cases among adults.RESULTS A total of 396 patients were found to have acute hepatitis during our study duration.HAV was diagnosed in 234 patients(59%)while 157 patients(39.6%)were found to have acute HEV infection.Additionally,acute hepatitis B virus infection was identified in 3 patients(0.7%),whereas acute hepatitis C virus infection was found in 2(0.5%)cases of acute hepatitis.Yearly trends showed increasing occurrence of HAV infection among adults over last 5 years.The patients with acute HAV were younger than patients with HEV(28 years±8 years vs 30 years±8 years;P<0.01).Higher levels of total bilirubin were seen in HEV infection,while higher levels of alanine transaminase were seen in HAV infection.However,a higher proportion of acute liver failure(ALF),coagulopathy,and mortality were observed in HEV.CONCLUSION An increase in acute hepatitis A cases among adults shows less severity than hepatitis E,highlighting the need for better sanitation,hygiene,and adult hepatitis A vaccination programs. 展开更多
关键词 Acute hepatitis Hepatitis A virus Hepatitis e virus Acute liver failure Hepatotropic virus VACCINATION
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The global marketplace that is Intertextile Shanghai Apparel Fabrics returns
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作者 Flora 《China Textile》 2018年第2期38-39,共2页
The global apparel fabrics and accessories industry is gearing up for its key spring summit–one of the trade fair highlights of the year where the entire sector gathers to do business,discover the latest fashion tren... The global apparel fabrics and accessories industry is gearing up for its key spring summit–one of the trade fair highlights of the year where the entire sector gathers to do business,discover the latest fashion trends,find new innovations and discuss what’s in store for the year ahead. 展开更多
关键词 In The global marketplace that is Intertextile Shanghai Apparel Fabrics returns
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5E教学模式应用于宏观经济学课程教学探索
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作者 王瑾瑾 《现代商贸工业》 2025年第1期147-149,共3页
宏观经济学课程教学内容主要为西方经济理论,理论性较强,教学团队教师结构单一,教学方式较传统,鉴于此,基于5E教学模式,对宏观经济学的教学进行改革,主要包括立足中国国情讲中国故事,引入案例式教学,通过翻转课堂提高学生学习积极性,通... 宏观经济学课程教学内容主要为西方经济理论,理论性较强,教学团队教师结构单一,教学方式较传统,鉴于此,基于5E教学模式,对宏观经济学的教学进行改革,主要包括立足中国国情讲中国故事,引入案例式教学,通过翻转课堂提高学生学习积极性,通过虚拟仿真教学实现学生对宏观经济运行的切身体验,旨在切实提高宏观经济学教学效果,培养高素质应用型人才。 展开更多
关键词 5e教学模式 虚拟仿真教学 合作教学
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益胃解毒方治疗慢性萎缩性胃炎的效果及对Cyclin E、Th17/Treg比值的影响分析 被引量:1
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作者 王立业 张艳彬 +4 位作者 朱亚楠 常玉娟 李晶 柳康康 朱玉光 《检验医学与临床》 CAS 2024年第18期2728-2732,共5页
目的分析益胃解毒方治疗慢性萎缩性胃炎中的效果及对细胞周期蛋白E(Cyclin E)水平、辅助性T细胞(Th17)/调节性T细胞(Treg)比值的影响。方法选取2019年6月至2022年6月在河北省石家庄市中医院确诊的150例慢性萎缩性胃炎患者作为研究对象,... 目的分析益胃解毒方治疗慢性萎缩性胃炎中的效果及对细胞周期蛋白E(Cyclin E)水平、辅助性T细胞(Th17)/调节性T细胞(Treg)比值的影响。方法选取2019年6月至2022年6月在河北省石家庄市中医院确诊的150例慢性萎缩性胃炎患者作为研究对象,按照随机数字表法分为益胃解毒方组、六君子汤组、益胃解毒方+六君子汤组,每组50例。益胃解毒方组使用益胃解毒方治疗,六君子汤组使用六君子汤治疗,益胃解毒方+六君子汤组使用益胃解毒方联合六君子汤治疗,均连续治疗24周。比较3组治疗效果、中医证候积分、Cyclin E水平、Th17/Treg比值、不良反应发生情况。结果益胃解毒方组治疗总有效率高于六君子汤组和益胃解毒方+六君子汤组,且益胃解毒方+六君子汤组高于六君子汤组,差异均有统计学意义(P<0.05)。治疗后3组各项中医证候积分低于治疗前,差异均有统计学意义(P<0.05)。治疗后益胃解毒方组各项中医证候积分低于六君子汤组和益胃解毒方+六君子汤组,且益胃解毒方+六君子汤组低于六君子汤组,差异均有统计学意义(P<0.05)。治疗后3组Cyclin E水平、Th17/Treg比值均低于治疗前,差异均有统计学意义(P<0.05)。治疗后益胃解毒方组Cyclin E水平、Th17/Treg比值低于六君子汤组和益胃解毒方+六君子汤组,且益胃解毒方+六君子汤组低于六君子汤组,差异均有统计学意义(P<0.05)。益胃解毒方组总不良反应发生率低于六君子汤组和益胃解毒方+六君子汤组,且益胃解毒方+六君子汤组低于六君子汤组,差异均有统计学意义(P<0.05)。结论益胃解毒方治疗慢性萎缩性胃炎效果显著,不仅能够改善患者临床症状,调节Cyclin E、Th17/Treg表达,还能减少不良反应发生,值得临床推广应用。 展开更多
关键词 胃癌前病变 益胃解毒方 细胞周期蛋白e 辅助性T细胞 调节性T细胞
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牛病毒性腹泻病毒E2蛋白的真核表达及间接ELISA抗体检测方法的建立 被引量:2
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作者 刘丹 黄小洁 +5 位作者 吴华伟 孙淼 陈延飞 秦义娴 侯力丹 薛麒 《动物医学进展》 北大核心 2024年第4期51-56,共6页
为建立检测牛病毒性腹泻病毒(Bovine viral diarrhea virus,BVDV)抗体的间接ELISA方法,利用昆虫细胞真核表达系统成功表达E2蛋白,将纯化后的E2蛋白作为包被抗原,用方阵滴定方法对影响ELISA的各个因素进行优化,并进行特异性、敏感性和重... 为建立检测牛病毒性腹泻病毒(Bovine viral diarrhea virus,BVDV)抗体的间接ELISA方法,利用昆虫细胞真核表达系统成功表达E2蛋白,将纯化后的E2蛋白作为包被抗原,用方阵滴定方法对影响ELISA的各个因素进行优化,并进行特异性、敏感性和重复性试验。结果表明,在昆虫细胞中表达了BVDV E2蛋白,Western blot证实目的蛋白可与BVDV阳性血清发生特异性反应。ELISA优化结果显示,E2蛋白最佳包被浓度为0.5μg/mL,最佳封闭液为1%明胶,最佳血清稀释度为1∶400,最佳血清作用方式为37℃作用30 min,酶标抗体的最佳作用方式为1∶2000稀释、37℃作用30 min,最佳底物作用时间为室温20 min,阳性临界值为OD 450≥0.423。与血清中和试验法进行比较,总符合率为97.8%,板内和板间重复性试验的变异系数均小于10%。该方法与牛常见病毒阳性血清均无交叉反应。说明建立的间接ELISA抗体检测方法特异性、敏感性和重复性良好,可用于大批量样本的临床检测和流行病学研究。 展开更多
关键词 牛病毒性腹泻病毒 e2蛋白 间接eLISA 抗体检测
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人参皂苷Rg3通过调控E2F1对人胃癌SGC-7901细胞生物行为学的影响 被引量:1
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作者 王建新 王琳茜 +3 位作者 朱波 时沛 孙义长 韩立 《中国药理学通报》 CAS CSCD 北大核心 2024年第5期853-858,共6页
目的探究人参皂苷Rg3通过调控E2F1对人胃癌SGC-7901细胞生物行为学的影响。方法MTT测定不同浓度人参皂苷Rg3(0、80、160、320μmol·L^(-1))对细胞增殖影响;流式细胞术测定不同浓度人参皂苷Rg3对细胞凋亡的影响;划痕愈合实验和Trans... 目的探究人参皂苷Rg3通过调控E2F1对人胃癌SGC-7901细胞生物行为学的影响。方法MTT测定不同浓度人参皂苷Rg3(0、80、160、320μmol·L^(-1))对细胞增殖影响;流式细胞术测定不同浓度人参皂苷Rg3对细胞凋亡的影响;划痕愈合实验和Transwell实验测定不同浓度人参皂苷Rg3对细胞迁移及侵袭的影响;Western blot测定不同浓度人参皂苷Rg3对E2F1、MMP-2、MMP-9、BCL-2、Bax表达的影响。结果80、160、320μmol·L^(-1)人参皂苷Rg3组细胞存活率与空白对照组比较明显降低,且呈浓度依赖性(P<0.05)。80、160、320μmol·L^(-1)人参皂苷Rg3组细胞凋亡率与空白对照组比较明显增加,且呈浓度依赖性(P<0.05)。80、160、320μmol·L^(-1)人参皂苷Rg3组细胞迁移数目与空白对照组比较明显降低,且呈浓度依赖性(P<0.05)。80、160、320μmol·L^(-1)人参皂苷Rg3组细胞侵袭数目与空白对照组比较明显降低,且呈浓度依赖性(P<0.05)。80、160、320μmol·L^(-1)人参皂苷Rg3组E2F1 mRNA与E2F1蛋白表达量相较空白对照组明显减少且,呈浓度依赖性(P<0.05)。80、160、320μmol·L^(-1)人参皂苷Rg3组细胞中MMP-2、MMP-9、BCL-2蛋白表达量与空白对照组比较明显降低,BCL-2与空白对照组比较明显升高,且呈浓度依赖性(P<0.05)。结论人参皂苷Rg3能降低胃癌SGC-7901细胞增殖能力,抑制细胞迁移及侵袭能力,同时还促进SGC-7901细胞凋亡,且具有浓度依赖性,其作用机制可能通过E2F1因子下调MMP-2、MMP-9、BCL-2表达,上调Bax表达有关。 展开更多
关键词 人参皂苷RG3 e2F1 胃癌 增殖 迁移和侵袭 凋亡
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载脂蛋白E联合临床相关指标预测阿尔兹海默病模型的建立与验证
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作者 吴天晨 杨卉 +1 位作者 梁艳 杨永刚 《中国卫生统计》 CSCD 北大核心 2024年第1期23-27,共5页
目的 以载脂蛋白E(ApoE)为基础,结合阿尔茨海默病发病危险因素及临床常见指标,构建阿尔兹海默病发病风险的临床预测模型。方法 从南京市中医院大数据平台中,检索时间为2019年1月至2021年1月两年时间内,阿尔兹海默病患者61例,模糊匹配健... 目的 以载脂蛋白E(ApoE)为基础,结合阿尔茨海默病发病危险因素及临床常见指标,构建阿尔兹海默病发病风险的临床预测模型。方法 从南京市中医院大数据平台中,检索时间为2019年1月至2021年1月两年时间内,阿尔兹海默病患者61例,模糊匹配健康体检者111例。利用LASSO回归筛选危险因素,构建logistic回归预测模型,10折交叉进行区分度验证,bootstrap法进行校准度验证,临床决策曲线评判预测模型的临床指导性,最后以列线图可视化呈现临床预测模型。结果 筛选出12个变量,最终纳入4个危险因素:年龄、游离三碘甲状腺素(FT3)、性别、ApoE。全样本ROC曲线下面积为0.879,10折交叉9次验证后ROC曲线下平均面积为0.864;采用Bootstrap法抽样及Hosmer-Lemeshow校准度检验,结果χ^(2)=6.496,P=0.592>0.05。临床决策曲线阈值概率区间为1%~88.6%。结论 利用年龄、游离三碘甲状腺素、性别、 ApoE构建的临床预测模型对患者进行个体化评估,可以预警阿尔兹海默病,开展早期预防干预,减缓该病的发生发展。 展开更多
关键词 痴呆 阿尔兹海默病 预测模型 载脂蛋白e
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肝喜片通过miR200a/ZEB信号通路抑制肝癌细胞HepG2上皮间质转化的机制研究
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作者 罗燕 唐蔚 +3 位作者 陈玲珑 曾千 张轩 罗吉 《湖南中医药大学学报》 CAS 2024年第11期2007-2013,共7页
目的研究肝喜片通过微小分子RNA200a/E盒结合锌指蛋白(microRNA200a/zinc finger E-box binding homeobox,miR200a/ZEB)信号通路抑制肝癌细胞HepG2上皮间质转化的机制。方法培养肝癌细胞HepG2,制备肝喜片含药血清,采用不同浓度(10%、15%... 目的研究肝喜片通过微小分子RNA200a/E盒结合锌指蛋白(microRNA200a/zinc finger E-box binding homeobox,miR200a/ZEB)信号通路抑制肝癌细胞HepG2上皮间质转化的机制。方法培养肝癌细胞HepG2,制备肝喜片含药血清,采用不同浓度(10%、15%、20%)的肝喜片含药血清作用于HepG2细胞,同时设置空白对照组。运用CCK-8实验检测HepG2细胞的增殖,划痕实验、Transwell实验分别检测HepG2细胞的横向迁移和纵向迁移,Western blot检测ZEB1、ZEB2、E钙黏蛋白(E-cadherin)、波形蛋白(Vimentin)的表达,RT-PCR检测miR200a、ZEB1、ZEB2、E-cadherin、Vimentin mRNA的表达。结果与空白对照组比较,肝喜片各剂量组的细胞存活率显著降低,且具有明显的时间和浓度依赖性(P<0.05,P<0.01);肝喜片各剂量组的横向迁移率及纵向迁移细胞数显著减少(P<0.05,P<0.01)。与空白对照组比较,肝喜片中、高剂量组miR200a表达升高,肝喜片各剂量组E-cadherin蛋白及中、高剂量组E-cadherin mRNA表达升高,肝喜片各剂量组Vimentin蛋白及中、高剂量组Vimentin mRNA表达下降,肝喜片各剂量组ZEB1、ZEB2蛋白及mRNA表达下降(P<0.05,P<0.01);与肝喜片低剂量组比较,肝喜片中、高剂量组miR200a、E-cadherin蛋白及mRNA表达升高,Vimentin、ZEB1、ZEB2蛋白及mRNA表达下降(P<0.05,P<0.01);与肝喜片中剂量组比较,肝喜片高剂量组miR200a、E-cadherin蛋白及mRNA表达升高,Vimentin、ZEB1、ZEB2蛋白及mRNA表达下降(P<0.05,P<0.01)。结论肝喜片可显著抑制肝癌细胞HepG2的增殖和转移,其机制与调控miR200a/ZEB信号通路、促进E-hadherin的表达、抑制Vimentin的表达、逆转上皮间质转化相关。 展开更多
关键词 肝癌 肝喜片 微小分子RNA200a 上皮间质转化 e盒结合锌指蛋白 e钙黏蛋白 波形蛋白
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创伤性颅脑损伤患者血清锌、维生素E与病情程度及预后的关系
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作者 张春满 梁晨 +4 位作者 曹慧琴 杨延庆 胡国良 折刚刚 韦玮 《疑难病杂志》 CAS 2024年第8期902-907,共6页
目的探讨创伤性颅脑损伤(TBI)患者血清锌、维生素E与病情程度及预后的关系。方法选取2020年1月—2023年8月延安大学附属医院神经外科收治的TBI患者135例为TBI组,根据格拉斯哥昏迷量表(GCS)评分分为轻度TBI亚组(GCS评分13~15分,54例)、中... 目的探讨创伤性颅脑损伤(TBI)患者血清锌、维生素E与病情程度及预后的关系。方法选取2020年1月—2023年8月延安大学附属医院神经外科收治的TBI患者135例为TBI组,根据格拉斯哥昏迷量表(GCS)评分分为轻度TBI亚组(GCS评分13~15分,54例)、中度TBI亚组(GCS评分9~12分,45例)、重度TBI亚组(GCS评分3~8分,36例),再根据患者90 d预后分为不良预后亚组(35例)和良好预后亚组(100例),另选同期体检健康者100例为健康对照组。采用锌比色法与高效液相色谱法检测血清锌、维生素E水平;比较TBI组与健康对照组和不同病情程度TBI患者血清锌、维生素E水平;采用Spearman相关系数分析血清锌、维生素E水平与GCS评分的相关性;多因素Logistic回归分析影响TBI患者不良预后的因素;绘制受试者工作特征(ROC)曲线评价血清锌、维生素E水平对TBI患者90 d死亡的预测价值。结果与健康对照组比较,TBI组血清锌、维生素E水平降低(t/P=10.836/<0.001、10.160/<0.001);不同病情程度TBI患者血清锌、维生素E水平比较,轻度TBI亚组>中度TBI亚组>重度TBI亚组(F/P=41.858/<0.001、104.911/<0.001)。135例TBI患者90 d不良预后发生率为25.93%(35/135);血清锌、维生素E水平与GCS评分均呈正相关(r s=0.709/<0.001、0.698/<0.001);GCS评分增加、血清锌升高、维生素E升高为TBI患者不良预后的独立保护因素[OR(95%CI)=0.809(0.690~0.950)、0.706(0.590~0.845)、0.726(0.599~0.880)],基底池异常、中线移位≥5 mm为TBI患者不良预后的独立危险因素[OR(95%CI)=5.989(1.492~24.036)、3.378(1.045~10.922)];血清锌、维生素E水平及二者联合预测TBI患者不良预后的AUC分别为0.783、0.774、0.856,二者联合的AUC大于血清锌、维生素E水平单独预测(Z/P=2.580/0.010、2.727/0.006)。结论TBI患者血清锌、维生素E水平降低,与病情程度加重和预后不良有关,二者联合对TBI患者不良预后有良好的预测价值。 展开更多
关键词 创伤性颅脑损伤 血清锌 维生素e 病情程度 预后
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栀子苷调节PI3K/AKT/mTOR信号通路在动脉粥样硬化形成过程中对Th17/Treg功能的影响 被引量:3
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作者 吴佳 吴进 +1 位作者 肖凯 凌超 《中西医结合心脑血管病杂志》 2024年第5期817-822,共6页
目的:观察栀子苷对载脂蛋白E缺乏(ApoE^(-/-))小鼠Th17/调节性T(Treg)细胞失衡的影响及其作用机制。方法:将50只纯合子ApoE^(-/-)雌性小鼠随机分为对照组、模型组和栀子苷低剂量组、栀子苷中剂量组、栀子苷高剂量组。对照组小鼠喂养普... 目的:观察栀子苷对载脂蛋白E缺乏(ApoE^(-/-))小鼠Th17/调节性T(Treg)细胞失衡的影响及其作用机制。方法:将50只纯合子ApoE^(-/-)雌性小鼠随机分为对照组、模型组和栀子苷低剂量组、栀子苷中剂量组、栀子苷高剂量组。对照组小鼠喂养普通饲料,模型组和栀子苷组小鼠喂养高脂饲料。从第8周开始,栀子苷各剂量组每日灌胃栀子苷(25、50、100 mg/kg),连续8周。试验结束时,采用油红O染色评估主动脉及其根部动脉粥样硬化(AS)病变面积比。采用定量逆转录聚合酶链式反应(RT-PCR)分析主动脉组织肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-6、IL-17A和IL-10 mRNA表达;采用流式细胞仪分析脾脏中Th17和Treg细胞百分比;蛋白免疫印迹法(Western Blot)检测主动脉组织磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(AKT)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路相关蛋白表达。结果:油红O染色病变显示,栀子苷中剂量组、栀子苷高剂量组病变百分比低于模型组(P<0.05)。与对照组比较,模型组主动脉TNF-α、IL-6和IL-17A mRNA表达水平升高(P<0.05);栀子苷各剂量组主动脉TNF-α、IL-6和IL-17A mRNA表达水平降低(P<0.05)。与对照组比较,模型组主动脉抗炎细胞因子IL-10 mRNA表达水平降低(P<0.05);栀子苷各剂量组主动脉抗炎细胞因子IL-10 mRNA表达水平升高(P<0.05)。与对照组比较,模型组小鼠脾脏中Th17细胞百分比升高,Treg细胞百分比降低(P<0.05)。栀子苷处理恢复了AS小鼠Th17和Treg细胞的平衡。栀子苷抑制PI3K的表达及AKT和mTOR的磷酸化,MHY1485(mTOR活化剂)减弱了栀子苷对T细胞分化的影响。结论:栀子苷抗AS作用机制可能与抑制PI3K/AKT/mTOR信号引起的Treg细胞增多和Th17细胞减少有关。 展开更多
关键词 动脉粥样硬化 栀子苷 载脂蛋白e缺乏 Th17/调节性T细胞 磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(AKT)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路 小鼠 实验研究
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