糖尿病肾脏疾病预后影响因素的COX比例风险回归模型分析

目的基于COX比例风险回归模型分析糖尿病肾脏疾病(diabetic kidney disease,DKD)预后的影响因素,为临床早期评估和防治DKD提供科学的依据。方法收集多中心(河南中医药大学第一附属医院、河南中医药大学第三附属医院、河南省中医院及郑州市人民医院)2010—2021年就诊治疗的DKD患者资料,包括一般资料、实验室指标、中医辨证分型及中医药治疗,以肾小球滤过率(eGFR)下降≥50%、血肌酐(Scr)翻倍、DKD 5期、死亡为结局指标,随访其发生时间及情况,利用COX比例风险回归模型分析筛选DKD预后影响因素。结果本研究最终纳入1947例患者,随访时间为4.65(4.557~4.746)年,发生复合终点事件305例(15.67%)。单因素COX回归分析结果表明,不同年龄、DKD病程≥4年、饮酒史、吸烟史、高血压、冠心病、脑血管病、糖尿病足、糖尿病眼病、糖化血红蛋白(HbA1c)、血尿酸(SUA)、Scr、24 h尿蛋白定量(24 h-UTP)、eGFR、湿热血瘀证、脾肾气虚兼湿聚血瘀证、脾肾阳虚兼血瘀证、中药熏洗、服用中药患者DKD预后情况比较,差异有统计学意义(P<0.05)。多因素COX回归分析结果表明,年龄[HR(95%CI)=2.52(1.92,3.30)]、DKD病程[HR(95%CI)=1.62(1.09,2.42)]、吸烟史[HR(95%CI)=1.61(1.13,2.29)]、饮酒史[HR(95%CI)=1.41(1.01,1.95)]、脑血管病[HR(95%CI)=1.33(1.01,1.75)]、糖尿病眼病[HR(95%CI)=1.43(1.13,1.82)]、SUA[HR(95%CI)=1.72(1.26,2.33)]、24 h-UTP[HR(95%CI)=1.48(1.14,1.91)]、脾肾气虚兼湿聚血瘀证[HR(95%CI)=2.22(1.44,3.43)]与DKD发生终点事件的风险关系密切(P<0.05),服用中药[HR(95%CI)=2.57(2.00,3.31)]能够减少终点事件的发生(P<0.05)。结论年龄、DKD病程、吸烟史、饮酒史、脑血管病、糖尿病眼病、SUA、24 h-UTP、脾肾气虚兼湿聚血瘀证是影响DKD患者预后的危险因素,而服用中药治疗为其保护因素。

Coxsackievirus B_(3m)与T-2毒素对小鼠脂质过氧化物代谢的影响

目的探讨Ｔ－２毒素与ＣｏｘｓａｃｋｉｅｖｉｒｕｓＢ３ｍ的双重作用对小鼠肝脏脂质过氧化物的影响。方法实验采用析因设计，ＢＡＬＢ／Ｃ小鼠随机分成４组，Ｉ正常对照组；Ⅱ病毒组；ⅢＴ－２毒素组；Ⅳ病毒＋毒素组。病毒组常规腹腔接种０．１ｍｌ内含１０００ＴＣＩＤ５０的１６４０营养液；毒素组隔日按１．０ｍｇ／ｋｇ体重Ｔ－２毒素灌胃，直至实验结束；病毒＋毒素组先Ｔ－２灌胃，３周后腹腔接种同稀释度病毒。各组鼠于病毒接种后第７天，１４天，２１天，３０天，５０天分批处死测定肝脏脂质过氧化物（ＬＰＯ）含量。结果显示病毒和Ｔ－２毒素均可非常明显（Ｐ＜０．０１）引起小鼠肝脏ＬＰＯ含量升高。两者双重作用更为明显，但两者之间没有交互作用。结论ＣｏｘｓａｃｋｉｅｖｉｒｕｓＢ３ｍ和Ｔ－２毒素作用于生物体可导致机体脂质过氧化损伤。

Cox健康行为互动模式对盆底功能障碍女性盆底康复的影响

女性盆底功能障碍(female pelvic floor dys function,FPFD)是盆底支持组织因损伤或衰老导致的以压力性尿失禁、盆腔脏器脱垂及性功能障碍等症状为主的疾病,由于症状部位隐私,患者羞耻感强,心理负担重,严重影响了患者社交活动、运动锻炼、性生活和日常生活质量[1].盆底肌肉康复训练是FPFD的主要治疗方式之一[2],其中Kegel训练是盆底肌肉康复训练的基础,但研究发现Kegel训练的依从性仅35%[3].因此,如何提高患者盆底肌肉训练的依从性显得非常重要.

选择性COX-2抑制剂引起心血管风险的研究进展

非甾体抗炎药(non-steroid anti-inflammatory drugs,NSAIDs)是一种有效的、广泛使用的抗炎镇痛药物,其对环氧合酶(cyclo-oxygenase,COX)亚型(COX-1、COX-2)的抑制作用将引起不同的反应,选择性COX-2抑制剂将显著增加不良心血管事件的风险,随着此类药物使用的增加和临床循证证据的积累,其带来的心血管风险引起了越来越多学者的关注。笔者通过归纳分析最新发表文献对选择性COX-2抑制剂引起心血管风险的研究进行综述,以期辅助临床合理用药,减少不良反应,提高用药安全性。

Murine model of acute myocarditis and cerebral cortical neuron edema induced by coxsackievirus B4

Globally, coxsackievirus B4 （CV-B4） has been continuously isolated and evidence suggests an association with the development of pancreatitis and type I diabetes. In addition, CV-B4 is also associated with myocarditis and severe central nervous system （CNS） complications, which remain poorly studied and understood. In the present study, we established an institute for Cancer Research （ICR） mouse model of CV-B4 infection and examined whether CV-B4 infection resulted in a predisposition to myocarditis and CNS infection. We found high survival in both the treatment and control group, with no significant differences in clinical outcomes observed. However, pathological lesions were evident in both brain and heart tissue of the CV-B4-infected mice. in addition, high viral loads were found in the neural and cardiac tissues as early as 2 days post infection. Expressions of IFN-y and IL-6 in sera were significantly higher in CV-B4-infected mice compared to uninfected negative controls, suggesting the involvement of these cytokines in the development of histopathological lesions. Our murine model successfully reproduced the acute myocarditis and cerebral cortical neuron edema induced by CV-B4, and may be useful for the evaluation of vaccine candidates and potential antivirals against CV-B4 infection.

Coxsackievirus B3 Infection Triggers Autophagy through 3 Pathways of Endoplasmic Reticulum Stress

Objective Autophagy is a highly conserved intracellular degradation pathway. Many picornaviruses induce autophagy to benefit viral replication, but an understanding of how autophagy occurs remains incomplete. In this study, we explored whether coxsackievirus B3(CVB3) infection induced autophagy through endoplasmic reticulum(ER) stress. Methods In CVB3-infected HeLa cells, the specific molecules of ER stress and autophagy were detected using Western blotting, reverse transcription polymerase chain reaction(RT-PCR), and confocal microscopy. Then PKR-like ER protein kinase(PERK) inhibitor, inositol-requiring protein-1(IRE1) inhibitor, or activating transcription factor-6(ATF6) inhibitor worked on CVB3-infected cells, their effect on autophagy was assessed by Western blotting for detecting microtubule-associated protein light chain 3(LC3). Results CVB3 infection induced ER stress, and ER stress sensors PERK/eIF2α, IRE1/XBP1, and ATF6 were activated. CVB3 infection increased the accumulation of green fluorescent protein(GFP)-LC3 punctuation and induced the conversion from LC3-Ⅰ to phosphatidylethanolamine-conjugated LC3-1(LC3-Ⅱ). CVB3 infection still decreased the expression of mammalian target of rapamycin(mTOR) and p-mTOR. Inhibition of PERK, IRE1, or ATF6 significantly decreased the ratio of LC3-Ⅱ to LC3-Ⅰ in CVB3-infected HeLa cells. Conclusion CVB3 infection induced autophagy through ER stress in HeL a cells, and PERK, IRE1, and ATF6 a pathways participated in the regulation of autophagy. Our data suggested that ER stress may inhibit mTOR signaling pathway to induce autophagy during CVB3 infection.

Evaluation of Reverse Transcription Loop-Mediated Isothermal Amplification assays for Rapid Detection of Human Enterovirus 71 and Coxsackievirus A16 in Clinical Samples

A sensitive reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay for human enterovirus 71 (EV71) and Coxsackievirus A16 (CVA16) infection was further evaluated. The one step reaction was performed in a single tube at 65?C for 45 min for EV71 and 35 min for CVA16. The detection limits of RT-LAMP assays for both EV71 and CVA16 were 0.1 of a 50% tissue culture infective dose (TCID50) per reaction, based on 10—Fold dilutions of a titrated EV71 or CVA16 strain. The specific assay showed there were no cross-reactions with Coxsackievirus A (CVA) viruses (CVA 2, 4, 5, 7, 9, 10, 14, and 25), Coxsackievirus B (CVB) viruses (CVB 1, 2, 3, 4, and 5) or ECHO viruses (ECHO 3, 6, 11, and 19). In parallel with commercial quantitative real-time polymerase chain reaction (qRT-PCR) diagnostic kits for EV71 and CVA16, the RT-LAMP assay was evaluated with 515 clinical specimens, the results showed the RT-LAMP assay and the qRT-PCR assay were in complete agreement for 513/515 (99.6%) of the specimens. Two samples with discrepant results from two methods were further verified by nested reverse transcription polymerase chain reaction (nRT-PCR) assay and sequencing to be true positives for CVA16. In conclusion, RT-LAMP assay is demonstrated to be a sensitive and specific assay and have a great potential for the rapid and visual screening of EV71 and CVA16 in China, especially in those resource-limited hospitals and rural clinics of provincial and municipal regions.

COX6B2在胃癌组织中高表达并影响患者的远期预后:基于抑制p53信号调控胃癌细胞的增殖及细胞周期

目的分析COX6B2在胃癌组织中的表达对患者远期预后的影响及其作用机制。方法基于公共数据库、患者病历资料分析COX6B2在胃癌和癌旁组织中表达量及其对患者预后的影响;富集分析COX6B2在胃癌中可能发挥的作用;应用慢病毒转染技术干预COX6B2的表达;通过CCK-8、流式细胞术及免疫印迹实验验证其生物学功能。结果TCGA数据库、免疫组化、免疫印迹和荧光定量PCR检测显示,COX6B2在胃癌组织中高表达(P<0.05);Kaplan-Meier plotter数据库和K-M曲线显示,COX6B2高表达组生存期短(P<0.05);统计分析发现COX6B2在胃癌组织高表达与临床病理分期、CEA及CA19-9密切相关(P<0.05),COX6B2高表达、CEA≥5μg/L及CA19-9≥37 kU/L均是影响患者术后5年生存率的独立危险因素(P<0.05)且COX6B2表达量对患者远期预后有一定预判价值(P<0.05);GO及KEGG富集结果显示,COX6B2主要参与细胞周期的调控等;CCK-8和流式检测显示,上调COX6B2促进细胞增殖,通过增加G1/S期细胞比例调控细胞周期(P<0.05)。免疫印迹结果显示,COX6B2抑制胃癌细胞中p53和p21的表达(P<0.05)。结论COX6B2在胃癌组织中高表达且影响患者远期预后,其可能通过调控细胞周期而影响胃癌恶性增殖的过程。

基于线粒体COX1和ND1基因顺序的黄河上游大鼻吻鮈遗传多样性分析

为探究黄河上游大鼻吻鮈(Rhinogobio nasutus)群体遗传多样性和遗传分化现状,本研究以永宁、平罗、磴口3个不同地理群体145尾大鼻吻鮈为研究对象,利用线粒体DNA COX1和ND1基因序列进行了遗传多样性分析。结果显示:COX1和ND1基因序列长度分别为1 466 bp、975 bp, A+T含量(57.25%,56.81%)均高于G+C(42.75%,43.19%)含量,具有明显的碱基组成偏向性;3个群体145尾样本中分别界定了11个和9个单倍型,均存在共享单倍型现象。在COX1和ND1基因序列中3个群体的平均单倍型多样性(Hd)、核苷酸多样性(π)及平均核苷酸差异(K)分别为0.745 3、0.001 3、1.841和0.364、0.000 48、0.472,3个群体遗传多样性呈现出磴口群体最高、平罗群体次之、永宁群体最小的特征。基于COX1和ND1的遗传变异分析(AMOVA),表明3个群体中遗传变异均主要来自群体内,且COX1基因序列中磴口群体与永宁群体之间存在显著性明显的遗传分化。基于线粒体COX1和ND1基因单倍型序列,采用邻近法(Neighbor Joining, NJ)构建系统进化树与单倍型网络结过具有一致性,表明3个群体之间无明显的谱系分化,结构比较单一,未发现形成单独分支的群体。中性检验结果显示,大鼻吻鮈进化历程符合中性进化假设,且可能存在群体扩张。因此,为了有效地保护大鼻吻鮈野生资源,建议将大鼻吻鮈从整体上进行就地保护。

Bioinformatic Analysis of Non-VP1 Capsid Protein of Coxsackievirus A6

This study bioinformatically analyzed the non-VP1 capsid proteins（VP2-VP4） of Coxasckievirus A6（CVA6）, with an attempt to predict their basic physicochemical properties, structural/functional features and linear B cell eiptopes. The online tools Sub Loc, Target P and the others from Ex PASy Bioinformatics Resource Portal, and SWISS-MODEL（an online protein structure modeling server）, were utilized to analyze the amino acid（AA） sequences of VP2-VP4 proteins of CVA6. Our results showed that the VP proteins of CVA6 were all of hydrophilic nature, contained phosphorylation and glycosylation sites and harbored no signal peptide sequences and acetylation sites. Except VP3, the other proteins did not have transmembrane helix structure and nuclear localization signal sequences. Random coils were the major conformation of the secondary structure of the capsid proteins. Analysis of the linear B cell epitopes by employing Bepipred showed that the average antigenic indices（AI） of individual VP proteins were all greater than 0 and the average AI of VP4 was substantially higher than that of VP2 and VP3. The VP proteins all contained a number of potential B cell epitopes and some eiptopes were located at the internal side of the viral capsid or were buried. We successfully predicted the fundamental physicochemical properties, structural/functional features and the linear B cell eiptopes and found that different VP proteins share some common features and each has its unique attributes. These findings will help us understand the pathogenicity of CVA6 and develop related vaccines and immunodiagnostic reagents.

Molecular Epidemiology of Coxsackievirus B1-5 Associated with HFMD in Fujian Province, China, 2011-2016

Hand,foot and mouth disease(HFMD)is a common infectious disease that usually affects children less than 5 years of age.HFMD is caused by human enteroviruses(HEVs).HEVs,members of the Enterovirus genus of the Picornaviridae(small RNA virus)family.

老年原发性肝癌微波消融术后复发危险因素的多元COX回归分析

目的按探讨老年原发性肝癌微波消融术后复发多元COX回归模型。方法去选择我院于2018年9月至2021年9月收治的原发性肝癌患者183例,均行微波消融术治疗。所有患者均随访至2023年9月,定期门诊、住院随访,于微波消融术后前3个月内,每月进行1次随访,之后以每3个月进行1次随访,随访终点为患者出现肿瘤复发。以完全消融术后肝内重复出现肝癌或者远处发生转移为复发。采用多元COX回归模型分析影响老年原发性肝癌微波消融术后复发危险因素。结果随访末,微波消融术治疗原发性肝癌患者183例中,复发患者39例,复发率为21.31%。单因素COX回归分析,不同性别、不同年龄、家族史、合并肝硬化、Chlid-Pugh分级、AST、ALT、HBVDNA阳性、腹水、脾大和消融次数复发率比较无明显差异(P>0.05);肿瘤直径>3cm复发率高于肿瘤直径≤3cm,AFP>400ng/ml复发率高于AFP≤400ng/ml(P<0.05)。经多元C0X回归模型分析显示,肿瘤直径>3cm和血清AFP>400ng/ml为影响微波消融术后复发危险因素。结论老年原发性肝癌微波消融术后复发率较高,而肿瘤直径和血清AFP为其危险因素.

Molecular Characterisation of Two Coxsackievirus B6 Strains from the Tibet Autonomous Region of China

Enteroviruses (EVs) are members of the genus Enteroviruswithin the orderPicornavirales, family Picornaviridae, and consist of 12 species, including EV-A, EV-B, EV-C, and EV-D, which are associated with human infections. Coxsackievirus B6 (CV-B6)belongs to the species EV-B, which currently consists of 63 serotypes, including echovirus (serotypes 1–7,9, 11–21, 24–27, 29–33), coxsackievirus group A (CVA9), coxsackievirus group B (CV-B, serotypes 1–6),the newly identified EVs (serotypes EV-B69, B73–75,B77–88, B93, B97–98, B100–101, B106–107, and B110–113), and the simian enterovirus SA5.

Cox健康行为互动护理干预对慢性肾衰竭透析患者自我管理行为及并发症的影响

目的 分析Cox健康行为互动护理干预对慢性肾衰竭透析患者自我管理行为及并发症的影响。方法 纳入2023年1月至2023年12月泉州市中医院收治的慢性肾衰竭透析患者92例,采用随机数字表法将其分为两组,对照组实施常规护理干预,观察组实施Cox健康行为互动护理干预,分析两组患者自我管理水平、生活质量、心理状态[汉密顿焦虑量表(HAMA)和汉密顿抑郁量表(HAMD)]和并发症情况。结果 观察组患者干预后问题解决、伙伴关系、自我护理、情绪处理评分均高于对照组(P <0.05);观察组患者干预后躯体功能、心理功能、生理功能、社会功能评分均高于对照组(P <0.05);观察组患者干预后HAMA、HAMD评分均低于对照组(P <0.05);观察组患者并发症总发生率低于对照组(P <0.05)。结论 Cox健康行为互动护理干预对慢性肾衰竭透析患者具有良好的作用,可通过改善躯体功能、生理功能、心理功能和社会功能,减少并发症的发生,促进患者透析治疗效果和整体健康状况的改善。

Coxsackievirus B infection presenting as a hemorrhagic pericardial effusion causing tamponade

The coxsackievirus is well known for its vastly differing clinical presentations.Patients with coxsackievirus usually present with a viral prodrome which can then progress to the cardiac symptoms of chest pain and/or palpitations.Most patients improve quickly with simply supportive care and nonsteroidal anti-inflammatory medications.

基于线粒体cox1、nad1和rrn L基因探讨马圆线科线虫间的亲缘关系

为探讨马圆线科线虫(圆线亚科和盅口亚科)间的亲缘关系,对长伞杯冠线虫(Cylicostephanus longibursatum)、冠状冠环线虫(Coronocyclus coronatus)、细口杯环线虫(Cylicocyclus leptostomus)、拉氏杯口线虫(Poteriostomum ratzii)、麦氏副杯口线虫(Parapoteriostomum mettami)和无齿圆形线虫(Strongylus edentatus)6种线虫的线粒体cox1、nad1和rrnL基因进行扩增,与同科相关线虫进行比较分析。然后以线粒体cox1、nad1和rrnL串联序列为标记基因,采用贝叶斯法(Bayesian inference,BI)构建进化树来探讨圆线科线虫间的亲缘关系。结果显示,研究中6种线虫的cox1序列长度均为1578 bp,nad1的序列长度除无齿圆形线虫为879 bp外,其余均为873 bp,rrnL序列长度均不同,大小为959~980 bp。6种线虫的cox1、nad1和rrnL的AT含量分别为67.55%~69.71%、71.36%~73.83%和80.88%~82.59%。圆线科线虫间cox1、nad1和rrnL基因的相似性分别为83.4%~97.9%、79.0%~98.4%和78.8%~98.9%。值得注意的是,圆线亚科的三齿属线虫与盅口亚科的相似性总体要高于同亚科的圆线属。进化分析显示,三齿属并没有与同亚科的圆线属形成独立分支,而是与盅口亚科线虫聚集在一起。在盅口亚科分支中,并非每一属单独形成一独立分支,冠环属和杯冠属最为明显,为复系。基于马圆线虫线粒体cox1、nad1和rrnL的序列和进化分析表明,三齿属线虫与盅口亚科的关系较圆线亚科更近,支持三齿属应隶属于盅口亚科这一假说。

Coxsackievirus A6 was the most common enterovirus serotype causing hand,foot,and mouth disease in Shiyan City,central China

BACKGROUND Hand,foot,and mouth disease(HFMD)has become one of the most common infectious diseases in China.Before 2016,the primary causal serotypes were enterovirus A71(EV-A71)and coxsackievirus A16(CV-A16).Following the introduction of EV-A71 vaccines in China since 2016,the situation could change.CV-A6 has recently replaced EV-A71 and CV-A16 in some areas of China.However,the epidemiological characteristics of central China remain unknown.AIM To investigate the clinical symptoms and pathogen spectrum of HFMD in Shiyan City,central China,in recent years.METHODS The epidemiological,clinical,and laboratory data from HFMD cases reported to the Shiyan Center for Disease Control and Prevention between January 2016 and December 2020 were analyzed.196 throat swab specimens were collected from hospitalized HFMD patients between January 2018 and December 2020.To detect and genotype enteroviruses,real-time reverse transcription-polymerase chain reaction and sequencing of the 5'-untranslated region were used.In Shiyan,168 laboratory-confirmed HFMD cases were studied using a logistic regression model to determine the effect of predominant enterovirus serotypes.Based on the logistic regression model,the least absolute shrinkage and selection operator model was used to analyze the correlation between CV-A6 infection and various clinical characteristics in HFMD patients in Shiyan.RESULTS From 2016 to 2020,35840 HFMD cases were reported in Shiyan.The number of cases decreased by 48.4%from 2016 to 2017.Approximately 1.58-fold increases were found in 2018 and 2019 when compared to the previous year,respectively.In 2020,a decrease of about 85.5%was reported when compared to 2019.The most common serotypes shifted from EV-A71 and CV-A16(about 60%-80%in 2016 and 2018)to others(more than 80.0%in 2017,2019,and 2020).EV-A71 lost its dominance in 2017 in Shiyan.Among 196 confirmed HFMD cases,85.7%tested positive for enterovirus,with CV-A6 being the most common serotype(121/168,72.0%).The positive rates for CV-A16 and CVA10 were 4.8%and 3.0%,respectively.There was no EV-A71 discovered.Infection with CV-A6 was linked to fever,myocardial damage,increased creatine kinase MB isoenzyme,and lactate dehydrogenase levels.CONCLUSION CV-A6 was the most common enterovirus serotype in Shiyan City,replacing EV-A71 and CV-A16 as the HFMD pathogen.Developing vaccines against CV-A6 or multiple pathogens,as well as rising CV-A6 surveillance,will help prevent HFMD in central China.

Coxsackievirus B3-induced apoptosis and Caspase-3

Cell death can be classified into two categories: apoptosis and necrosis. Apoptotic pathway can beeither caspase-dependent or caspase-independent. Caspase-independent cytopathic effect (CPE) has beendescribed. In order to evaluate the pattern of HeLa cell death induced by Coxsackievirus B3 (CVB3)and whether apoptosis involves caspase activation, we co-cultivated HeLa cells with CVB3 and detectedthe cytopathic changes, the alteration of mRNA and protein expression of caspase-3 gene plus caspase-3activity, as well as analyzing DNA fragmentation before and after caspase-3 activity inhibition. Accordingto the results, we propose that CVB3 may induce apoptosis and necrosis in HeLa cells, the latter appearingmuch earlier. Caspase-3 is activated at the levels of both transcription and translation, and procaspase-3 isproteolytically cleaved, thus leading to the continuous increasing of both caspase-3 precursor protein and itssubunit. However, besides CPE, apoptosis induced by CVB3 is not a direct consequence of the activationof caspase-3, or caspase-3 is not the only effector molecule in apoptotic cell death, for caspase-3 inhibitorcan not decrease DNA fragmentation. Some other biochemical mechanisms may participate in the process,whose role weakens the effect of inhibiting caspase-3 activity.

Analysis of the expression of coxsackievirus and adenovirus receptor in five colon cancer cell lines

AIM: To investigate the expression of coxsackievirus and adenovirus receptor (CAR) and adenovirus-mediated reporter gene transfer in five human colon cancer cell lines. METHODS: Expression of CAR-specific mRNA and protein was analyzed by reverse transcriptase polymerase chain reaction and Western blotting,respectively. Adenovirus-based gene delivery was evaluated by infection of cells with adenoviral vector carrying the green fluorescent protein (GFP) gene. RESULTS: All the colon cancer cell lines examined (HT29,LS180,SW480,SW948 and SW1116) expressed CAR full-length mRNA and an alternatively-spliced variant that lacks the transmembrane coding exon. All cell lines were detected as CAR-positive by Western blot analysis. Further,all cells we examined were efficiently infected with adenoviral vector-GFP. CONCLUSION: The data indicated that the five colon cancer cell lines tested expressed adenovirus primary receptor and could be efficiently infected by adenoviral vectors. Therefore,these cell lines will be useful for adenovirus-based gene transfer and research.

竞争风险下Fine-Gray模型与Cox模型的比较与评价

在生存分析中经常会遇到存在竞争风险的情形,在存在竞争风险情形下,比较Cox模型与Fine-Gray模型估计的分析效果。本文介绍了在存在竞争风险情形下的Fine-Gray模型,举例说明了Fine-Gray模型风险集的定义以及权重计算方法,并利用Cox模型与Fine-Gray模型对实际存在竞争风险的数据集进行了实例分析,结果表明,Fine-Gray模型与Cox模型分析结果不同,尤其是Cox模型会高估事件的累计发生率。因此,在生存分析中存在竞争风险时,选择Fine-Gray模型进行建模是更适合的。