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

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。

基于E81T8-Ni2填充盖面的L415M管线钢的焊接工艺评定

L415M管线钢环向焊接接头焊接工艺填充盖面焊丝采用E81T8-Ni2代替E71T8-Ni1,替代原则不符合GB/T 31032—2014《钢质管道焊接及验收》的覆盖原则,需要重新进行焊接工艺评定。基于施工单位焊接工艺需求,为了验证E81T8-Ni2能否用于L415M对接焊缝的填充盖面焊接,采用焊条电弧焊打底,自保护药芯焊丝半自动焊填充盖面组合焊接方法,根焊焊接材料为E6010,填充盖面为E81T8-Ni2,依据GB/T31032—2014进行焊接工艺评定。对评定试样进行外观检查、无损检测、拉伸试验、弯曲试验、刻槽锤断试验以及冲击试验。试验结果表明,L415M管线钢环向焊接接头各项指标合格,拉伸试样断在母材上,焊接接头满足高强匹配要求。焊接工艺评定试验研究成果可为长输管道用L415M管线钢焊接工艺以及焊材选择提供参考。

Clinical outcome and prognostic factors of T4N0M0 colon cancer after R0 resection:A retrospective study

BACKGROUND Paradoxically,patients with T4N0M0(stage II,no lymph node metastasis)colon cancer have a worse prognosis than those with T2N1-2M0(stage III).However,no previous report has addressed this issue.AIM To screen prognostic risk factors for T4N0M0 colon cancer and construct a prognostic nomogram model for these patients.METHODS Two hundred patients with T4N0M0 colon cancer were treated at Tianjin Medical University General Hospital between January 2017 and December 2021,of which 112 patients were assigned to the training cohort,and the remaining 88 patients were assigned to the validation cohort.Differences between the training and validation groups were analyzed.The training cohort was subjected to multi-variate analysis to select prognostic risk factors for T4N0M0 colon cancer,followed by the construction of a nomogram model.RESULTS The 3-year overall survival(OS)rates were 86.2%and 74.4%for the training and validation cohorts,respectively.Enterostomy(P=0.000),T stage(P=0.001),right hemicolon(P=0.025),irregular review(P=0.040),and carbohydrate antigen 199(CA199)(P=0.011)were independent risk factors of OS in patients with T4N0M0 colon cancer.A nomogram model with good concordance and accuracy was constructed.CONCLUSION Enterostomy,T stage,right hemicolon,irregular review,and CA199 were independent risk factors for OS in patients with T4N0M0 colon cancer.The nomogram model exhibited good agreement and accuracy.

Th17/Treg balance and macrophage polarization ratio in lower extremity arteriosclerosis obliterans

Objective:To explore the balance of peripheral blood T helper 17 cells/regulatory T cell(Th17/Treg)ratio and the polarization ratio of M1 and M2 macrophages in lower extremity arteriosclerosis obliterans(ASO).Methods:A rat model of lower extremity ASO was established,and blood samples from patients with lower extremity ASO before and after surgery were obtained.ELISA was used to detect interleukin 6(IL-6),IL-10,and IL-17.Real-time RCR and Western blot analyses were used to detect Foxp3,IL-6,IL-10,and IL-17 expression.Moreover,flow cytometry was applied to detect the Th17/Treg ratio and M1/M2 ratio.Results:Compared with the control group,the iliac artery wall of ASO rats showed significant hyperplasia,and the concentrations of cholesterol and triglyceride were significantly increased(P<0.01),indicating the successful establishment of ASO.Moreover,the levels of IL-6 and IL-17 in ASO rats were pronouncedly increased(P<0.05),while the IL-10 level was significantly decreased(P<0.05).In addition to increased IL-6 and IL-17 levels,the mRNA and protein levels of Foxp3 and IL-10 in ASO rats were significantly decreased compared with the control group.The Th17/Treg and M1/M2 ratios in the ASO group were markedly increased(P<0.05).These alternations were also observed in ASO patients.After endovascular surgery(such as percutaneous transluminal angioplasty and arterial stenting),all these changes were significantly improved(P<0.05).Conclusions:The Th17/Treg and M1/M2 ratios were significantly increased in ASO,and surgery can effectively improve the balance of Th17/Treg,and reduce the ratio of M1/M2,and the expression of inflammatory factors.

Rational and Continuous Measurement of the Emotional Decision Making in Visual Recognition of Facial Emotional Expressions with M.A.R.I.E.: First Half

Context: The advent of Artificial Intelligence (AI) requires modeling prior to its implementation in algorithms for most human skills. This observation requires us to have a detailed and precise understanding of the interfaces of verbal and emotional communications. The progress of AI is significant on the verbal level but modest in terms of the recognition of facial emotions even if this functionality is one of the oldest in humans and is omnipresent in our daily lives. Dysfunction in the ability for facial emotional expressions is present in many brain pathologies encountered by psychiatrists, neurologists, psychotherapists, mental health professionals including social workers. It cannot be objectively verified and measured due to a lack of reliable tools that are valid and consistently sensitive. Indeed, the articles in the scientific literature dealing with Visual-Facial-Emotions-Recognition (ViFaEmRe), suffer from the absence of 1) consensual and rational tools for continuous quantified measurement, 2) operational concepts. We have invented a software that can use computer-morphing attempting to respond to these two obstacles. It is identified as the Method of Analysis and Research of the Integration of Emotions (M.A.R.I.E.). Our primary goal is to use M.A.R.I.E. to understand the physiology of ViFaEmRe in normal healthy subjects by standardizing the measurements. Then, it will allow us to focus on subjects manifesting abnormalities in this ability. Our second goal is to make our contribution to the progress of AI hoping to add the dimension of recognition of facial emotional expressions. Objective: To study: 1) categorical vs dimensional aspects of recognition of ViFaEmRe, 2) universality vs idiosyncrasy, 3) immediate vs ambivalent Emotional-Decision-Making, 4) the Emotional-Fingerprint of a face and 5) creation of population references data. Methods: With M.A.R.I.E. enable a rational quantified measurement of Emotional-Visual-Acuity (EVA) of 1) a) an individual observer, b) in a population aged 20 to 70 years old, 2) measure the range and intensity of expressed emotions by 3 Face-Tests, 3) quantify the performance of a sample of 204 observers with hyper normal measures of cognition, “thymia,” (ibid. defined elsewhere) and low levels of anxiety 4) analysis of the 6 primary emotions. Results: We have individualized the following continuous parameters: 1) “Emotional-Visual-Acuity”, 2) “Visual-Emotional-Feeling”, 3) “Emotional-Quotient”, 4) “Emotional-Deci-sion-Making”, 5) “Emotional-Decision-Making Graph” or “Individual-Gun-Trigger”6) “Emotional-Fingerprint” or “Key-graph”, 7) “Emotional-Finger-print-Graph”, 8) detecting “misunderstanding” and 9) detecting “error”. This allowed us a taxonomy with coding of the face-emotion pair. Each face has specific measurements and graphics. The EVA improves from ages of 20 to 55 years, then decreases. It does not depend on the sex of the observer, nor the face studied. In addition, 1% of people endowed with normal intelligence do not recognize emotions. The categorical dimension is a variable for everyone. The range and intensity of ViFaEmRe is idiosyncratic and not universally uniform. The recognition of emotions is purely categorical for a single individual. It is dimensional for a population sample. Conclusions: Firstly, M.A.R.I.E. has made possible to bring out new concepts and new continuous measurements variables. The comparison between healthy and abnormal individuals makes it possible to take into consideration the significance of this line of study. From now on, these new functional parameters will allow us to identify and name “emotional” disorders or illnesses which can give additional dimension to behavioral disorders in all pathologies that affect the brain. Secondly, the ViFaEmRe is idiosyncratic, categorical, and a function of the identity of the observer and of the observed face. These findings stack up against Artificial Intelligence, which cannot have a globalist or regionalist algorithm that can be programmed into a robot, nor can AI compete with human abilities and judgment in this domain. *Here “Emotional disorders” refers to disorders of emotional expressions and recognition.

Rational and Continuous Measurement of Emotional-Fingerprint, Emotional-Quotient and Categorical vs Proportional Recognition of Facial Emotions with M.A.R.I.E., Second Half

Context: The advent of Artificial Intelligence (AI) requires modeling prior to its implementation in algorithms for most human skills. This observation requires us to have a detailed and precise understanding of the interfaces of verbal and emotional communications. The progress of AI is significant on the verbal level but modest in terms of the recognition of facial emotions even if this functionality is one of the oldest in humans and is omnipresent in our daily lives. Dysfunction in the ability for facial emotional expressions is present in many brain pathologies encountered by psychiatrists, neurologists, psychotherapists, mental health professionals including social workers. It cannot be objectively verified and measured due to a lack of reliable tools that are valid and consistently sensitive. Indeed, the articles in the scientific literature dealing with Visual-Facial-Emotions-Recognition (ViFaEmRe), suffer from the absence of 1) consensual and rational tools for continuous quantified measurement, 2) operational concepts. We have invented a software that can use computer-morphing attempting to respond to these two obstacles. It is identified as the Method of Analysis and Research of the Integration of Emotions (M.A.R.I.E.). Our primary goal is to use M.A.R.I.E. to understand the physiology of ViFaEmRe in normal healthy subjects by standardizing the measurements. Then, it will allow us to focus on subjects manifesting abnormalities in this ability. Our second goal is to make our contribution to the progress of AI hoping to add the dimension of recognition of facial emotional expressions. Objective: To study: 1) categorical vs dimensional aspects of recognition of ViFaEmRe, 2) universality vs idiosyncrasy, 3) immediate vs ambivalent Emotional-Decision-Making, 4) the Emotional-Fingerprint of a face and 5) creation of population references data. Methods: M.A.R.I.E. enables the rational, quantified measurement of Emotional Visual Acuity (EVA) in an individual observer and a population aged 20 to 70 years. Meanwhile, it can measure the range and intensity of expressed emotions through three Face- Tests, quantify the performance of a sample of 204 observers with hypernormal measures of cognition, “thymia” (defined elsewhere), and low levels of anxiety, and perform analysis of the six primary emotions. Results: We have individualized the following continuous parameters: 1) “Emotional-Visual- Acuity”, 2) “Visual-Emotional-Feeling”, 3) “Emotional-Quotient”, 4) “Emotional-Decision-Making”, 5) “Emotional-Decision-Making Graph” or “Individual-Gun-Trigger”, 6) “Emotional-Fingerprint” or “Key-graph”, 7) “Emotional-Fingerprint-Graph”, 8) detecting “misunderstanding” and 9) detecting “error”. This allowed us a taxonomy with coding of the face-emotion pair. Each face has specific measurements and graphics. The EVA improves from ages of 20 to 55 years, then decreases. It does not depend on the sex of the observer, nor the face studied. In addition, 1% of people endowed with normal intelligence do not recognize emotions. The categorical dimension is a variable for everyone. The range and intensity of ViFaEmRe is idiosyncratic and not universally uniform. The recognition of emotions is purely categorical for a single individual. It is dimensional for a population sample. Conclusions: Firstly, M.A.R.I.E. has made possible to bring out new concepts and new continuous measurements variables. The comparison between healthy and abnormal individuals makes it possible to take into consideration the significance of this line of study. From now on, these new functional parameters will allow us to identify and name “emotional” disorders or illnesses which can give additional dimension to behavioral disorders in all pathologies that affect the brain. Secondly, the ViFaEmRe is idiosyncratic, categorical, and a function of the identity of the observer and of the observed face. These findings stack up against Artificial Intelligence, which cannot have a globalist or regionalist algorithm that can be programmed into a robot, nor can AI compete with human abilities and judgment in this domain. *Here “Emotional disorders” refers to disorders of emotional expressions and recognition.

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

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。

奥希替尼联合赛沃替尼二线治疗EGFR-TKI治疗期间T790M突变的转移性NSCLC的临床疗效

目的探讨奥希替尼联合赛沃替尼二线治疗表皮生长因子受体-酪氨酸激酶抑制剂(EGFR-TKI)治疗期间T790M突变的转移性非小细胞肺癌(NSCLC)的效果及安全性。方法选取2021年1月至2022年1月安康市人民医院接收的EGFR-TKI治疗期间T790M突变的转移性NSCLC患者94例。采用随机数字表法将患者分为研究组(47例)和对照组(47例)。治疗期间研究组失访7例,最终入组40例;对照组失访9例,最终入组38例。对照组男24例,女14例;年龄(60.32±5.71)岁;体重指数(BMI)(18.06±1.61)kg/m2;采用奥希替尼治疗。研究组男27例,女13例;年龄(61.05±6.64)岁;BMI(18.13±1.54)kg/m2;在对照组基础上,采用赛沃替尼治疗。治疗3个月后,比较两组的疗效和不良反应;比较两组治疗前后的血清癌胚抗原(CEA)、细胞角质蛋白19片段抗原21-1(CYFRA21-1)、血管内皮生长因子(VEGF)、基质金属蛋白酶-9(MMP-9)水平。治疗后随访2年,记录两组的中位无进展生存期(PFS)和中位总生存期(OS)。采用独立样本t检验、配对t检验、χ^(2)检验、Kaplan-Meier分析、Log-rank检验。结果治疗后,研究组CEA[(65.30±14.29)μg/L]、CYFRA21-1[(1.62±0.69)μg/L]、VEGF[(381.04±27.64)ng/L]、MMP-9[(151.98±25.47)μg/L]水平均低于对照组[(73.59±16.03)μg/L、(2.57±0.76)μg/L、(396.61±26.51)ng/L、(169.07±26.54)μg/L],差异均有统计学意义(均P<0.05)。研究组的疾病控制率[85.00%(34/40)]、客观缓解率[62.50%(25/40)]均高于对照组[65.79%(25/38)、39.47%(15/38)],差异均有统计学意义(均P<0.05)。两组药物不良反应总发生率比较,差异无统计学意义(P>0.05)。两组PFS、OS比较,差异均有统计学意义(均P<0.05)。结论奥希替尼联合赛沃替尼二线治疗EGFR-TKI治疗期间T790M突变的转移性NSCLC,有助于提高疾病控制率,延长患者的生存期,且安全性良好。

T.I.M.E.焊工艺与高效MAG焊的发展

介绍了T .I.M .E .焊工艺的特点、工艺本身对焊接设备的要求以及此工艺在国内外的研究现状和高效MAG焊的发展趋势。

T.I.M.E.焊工艺特点及其发展现状

T.I.M.E.焊工艺是一种新型的高效、高熔敷率的气体保护焊工艺,本文介绍了它的主要特点及优越性。从药芯焊丝和实心焊丝两方面对T.I.M.E.焊接工艺在欧洲的发展作了简要介绍。分析了T.I.M.E.焊工艺的工作机理。

基于Wnt/β-连环蛋白通路探究金天格对肿瘤坏死因子-α诱导的小鼠MC3T3E1细胞生物学功能的影响实验研究

目的:探讨金天格通过调节Wnt/β-连环蛋白(Wnt/β-catenin)通路对肿瘤坏死因子-α(TNF-α)诱导的小鼠成骨细胞(MC3T3E1)细胞生物学功能的影响。方法:体外培养MC3T3E1细胞,分为对照组、TNF-α组(50 ng/ml TNF-α)、L-金天格组(50 ng/ml TNF-α+10^(-6) g/L金天格)、M-金天格组(50 ng/ml TNF-α+10-5 g/L金天格)、H-金天格组(50 ng/ml TNF-α+10^(-4) g/L金天格)、Dickkopf-1(DKK-1)组(50 ng/ml TNF-α+10 ng/ml Wnt/β-catenin通路抑制剂DKK-1)、H-金天格+LiCl组(50 ng/ml TNF-α+10^(-4) g/L金天格+20μmol/L Wnt/β-catenin通路激活剂LiCl)。用CCK-8试剂盒对细胞活性进行检测,用流式细胞仪对细胞凋亡情况进行检测,用酶联免疫吸附试验对细胞白细胞介素-1β(IL-1β)和IL-6水平进行检测,用Western blot对细胞凋亡相关蛋白及Wnt/β-catenin信号通路蛋白表达情况进行检测。结果:与对照组比较,TNF-α组细胞活性、B淋巴细胞瘤-2(Bcl-2)、细胞程序性死亡配体-1(PD-L1)蛋白表达降低,细胞凋亡率、IL-1β、IL-6水平以及B细胞淋巴瘤(Bax)、β-catenin、转录因子7样2(TCF7L2)、细胞周期蛋白D1(Cyclin D1)蛋白表达升高(均P<0.05)。与TNF-α组比较,L-金天格组、M-金天格组、H-金天格组、DKK-1组细胞活性及Bcl-2、PD-L1蛋白表达升高,细胞凋亡率、IL-1β、IL-6水平以及Bax、β-catenin、TCF7L2、Cyclin D1蛋白表达降低(均P<0.05)。与H-金天格组比较,H-金天格+LiCl组细胞活性及Bcl-2、PD-L1蛋白表达降低,细胞凋亡率、IL-1β、IL-6水平以及Bax、β-catenin、TCF7L2、Cyclin D1蛋白表达升高(均P<0.05)。结论:金天格可能通过抑制Wnt/β-catenin通路减轻TNF-α诱导的MC3T3E1细胞损伤。

奥希替尼联合同步放化疗治疗EGFR T790M突变的晚期非小细胞肺癌患者的临床效果

目的 探讨奥希替尼联合同步放化疗治疗表皮生长因子受体(EGFR)T790M突变的晚期非小细胞肺癌(NSCLC)患者的临床效果。方法 选取2016年3月至2018年9月本院收治的82例EGFR T790M突变的晚期NSCLC患者,采用随机数字表法将其分为对照组(41例)和观察组(41例)。对照组给予同步放化疗治疗,观察组给予奥希替尼联合同步放化疗治疗。比较两组的治疗效果。结果 观察组的疾病控制率、客观缓解率高于对照组,差异具有统计学意义(P<0.05)。观察组的Ⅰ+Ⅱ级皮疹、胃肠道反应、甲沟炎发生率高于对照组,差异具有统计学意义(P<0.05)。随访2年,观察组的无进展生存时间(PFS)为11.32(6.85,12.41)个月,长于对照组的7.29(4.91,9.32)个月(P<0.05);随访1、2年,观察组的生存率为75.61%、39.02%,高于对照组的56.10%、12.20%,差异具有统计学意义(P<0.05)。结论 奥希替尼联合同步放化疗治疗EGFR T790M突变的晚期NSCLC患者可提高近远期治疗效果,延长PFS,提升患者生存率,具有较高的临床应用价值。

PZT的EMI技术在土木工程健康监测中的研究进展

PZT(P iezoe lectric-ceram ic)的EM I(E lectro-m echan ica l im pedance)技术以其适于在线监测的诸多优点受到越来越多的关注。本文系统地阐述了PZT的E/M(电-机)耦合特性、PZT与本体结构的相互作用模型、EM I技术的基本原理及其在土木工程中的研究应用。利用PZT的EM I技术进行健康监测是具有广泛应用前景的一种方法,但由于其研究应用的时间不长,目前仍然处于试验室研究阶段,文中对该项技术中尚需解决的几个问题进行了总结。

维生素E对小鼠胸腺和脾脏T淋巴细胞转化及MΦ诱导IL－1的影响

ＶＥ缺乏组、１／３需要量组、需要量组、３倍需要量组、２０倍需要量组的初断奶小鼠喂养８周后观察Ｔ淋巴细胞转化及Ｍ中诱导ＩＬ－１反应。结果表明，ＶＥ增强半合适、合适剂量ＣｏｎＡ诱导的胸腺、脾脏Ｔ淋巴细胞转化，且半合适剂量诱导的反应高于合适剂量，ＶＥ增强合适剂量ＰＨＡ诱导的脾Ｔ细胞反应，但不影响其诱导胸腺Ｔ细胞反应。ＶＥ还提高ＭΦ诱导ＩＬ－１生成。上述实验以缺乏组反应最弱，３倍量组反应最强，而２０倍量组反有下降趋势。

基于凸函数积分性质的Hermite-Hadamard不等式的加细

首先证明了凸函数的两个积分性质,即凸函数的算术平均值关于积分上限或下限为凸函数.从凸函数的这两个积分性质出发,建立了积分不等式,它是Hermite-Hadamard不等式的加细.

Tiaml和E-cadherin在非肌层浸润性膀胱癌组织中的表达及其与复发的关系

目的探讨T淋巴瘤侵袭转移诱导因子1(Tiam1)和E钙黏蛋白(E-cad)在非肌层浸润性膀胱癌(NMIBC)组织中的表达及其与复发的相关性。方法应用免疫组织化学染色法检测50例份前列腺增生患者的正常膀胱黏膜组织及116例份病理证实的NMIBC患者的癌组织Tiam1和E-cad表达,并分析其与患者临床特征、病理分级以及预后的关系。根据肿瘤标记物不同表达进行分组,分为Tiam1(+) E-cad(+)(A组)、Tiam1(+) E-cad(-)(B组)、Tiam1(-) E-cad(+)(C组)、Tiam1(-) E-cad(-)(D组)四组,比较四组复发率。结果 116例NMIBC患者复发率40.52%(47/116),Tiam1表达阳性率为36.21%(42/116),E-cad表达阳性率为36.21%(42/116),其异常表达与肿瘤病理分级、复发有关(P均<0.05),与性别、肿瘤直径无关(P均>0.05)。COX回归分析表明,肿瘤分级及组织Tiam1、E-cad是NMIBC复发的影响因素(P均<0.05)。B组患者术后复发率较其他三组高(P均<0.05)。结论 NMIBC组织中Tiam1及E-cad表达均升高。癌组织中Tiam1阳性表达及E-cad阴性表达与NMIBC复发有关。

急性肺栓塞患者BNP、CTnI、D-dimer水平改变及其临床意义

【目的】探讨检测急性肺栓塞患者的血浆脑钠肽（BNP）、肌钙蛋白I（cTnI）及D‐二聚体（D‐dimer）水平变化的临床意义。【方法】选择本院2009年1月至2013年12月收治的急性肺栓塞患者64例，根据患者病情分为大面积肺栓塞组（ n ＝27）和非大面积肺栓塞组（ n ＝37），对两组患者血浆cTnI、BNP及D‐dimer水平进行测定，观察比较两组患者各指标水平的变化及右心功能和病死率。【结果】大面积肺栓塞组BN P、血浆cTnI水平明显高于非大面积肺栓塞组，两组比较差异有显著性（ P ＜0．05）；两组D‐dimer浓度比较差异无统计学意义（ P ＞0．05）；大面积肺栓塞组的右心功能不全者和病死率均高于非大面积肺栓塞组，两组比较差异有统计学意义（ P ＜0．05）。【结论】检测BNP、cTnI及D‐dimer水平对APE患者临床诊断、临床决策及预后判断具有重要的临床意义。

Allozyme Diversity and Population Genetic Structure of Three Medicinal Epimedium Species from Hubei

Three Epimedium species, E. pubescens Maxim., E. sagittatum （Sieb. ＆ Zucc.） Maxim., and E. wushanense T. S. Ying, which are sympatrically distributed in the western Hubei Province, have been used in traditional Chinese medicine （TCM） for about 2,000 years. Genetic variability and population genetic structure of 11 natural populations of these Epimedium species were investigated using isoelectric focusing in thin-layer polyacrylamide slab gels. Of the 22 enzyme systems prescreened, six coding for 13 loci and 45 alleles were resolved, which were used for analyzing genetic diversity and population structure at both intraspecific and interspecific levels. The results showed that： l） high levels of genetic diversity were observed in all three species （A = 2.6-3.2, P = 69.2%-84.6%, Ho= 0.274-0.377, HE= 0.282-0.369）, which were higher than that of other herbaceous and aulmal-pollinated species with similar life-history characteristics; 2） there was significant deviation from Hardy-Weinberg Equilibrium, with one half of the loci showing heterozygote excess and the other homozygote excess, in all populations, suggesting the complicated breeding system of Epimedium species; 3） the low level of intraspecific and interspecific genetic differentiation （GST= 0.0246-0.0409 and 0.0495-0.1213, respectively） indicated a high level of gene flow among populations and close genetic relationship among the three species; and 4） UPGMA cluster analysis further showed that E. pubescens was more closely related to E. sagittatum than to E. wushanense, which was in good agreement with the morphological characters and the recent phylogenetic analysis of these species. On the basis of these results, it was concluded that the mixed breeding system, long-lived perennial life form, ancient evolutionary history, and seed dispersal by ants in Epimedium are responsible for the genetic variation and population structure of these species.

Cimatron E加工汽轮T型叶根

本文通过对汽轮机T型叶根的结构的分析,制定数控加工工艺,介绍了基于Cimatron E软件加工刀路编程的设置和刀路的修改,探讨了T型叶根数控加工的方法。

基于Pro/Mechanica的T型工装优化设计分析

对于不断发展中的产品,其使用环境也在发生变化,这对产品的力学环境试验能力提出了更高的要求。为了保障产品顺利完成力学试验验证,需要对工装设计进行严格把关。通过应用Pro/Mechanica对某T型工装的结构设计进行有限元分析、设计参数模态分析和灵敏度分析,并建立以1阶固有频率为目标函数,工装质量为约束的优化数学模型,对参数尺寸进行了最优计算。通过这一优化设计分析,在满足振动技术要求的同时,把产品设计与三维仿真及有限元分析系统有效地结合起来,从而实现了工装设计的高效率、低成本和自动化要求。