EphA7基因在原发性肝细胞癌中的表达及其临床意义

目的 探讨原发性肝细胞癌中EphA7 mRNA的表达及其临床意义.方法 应用逆转录-聚合酶链反应(RT-PCR)及实时荧光定量PCR法检测EphA7 mRNA在40例肝癌及相应的癌旁肝组织和10例正常肝组织中的表达,并分析其与肝癌临床病理因素之间的关系.结果 40例肝癌组织及相应的癌旁肝组织和10例正常肝组织中均有EphA7 mRNA的表达.实时荧光定量PCR分析显示EphA7 mRNA在肝癌组织(20.0711±32.0232)中的表达显著高于癌旁肝组织(4.5184±9.4738,P＜0.05)和正常肝组织(4.1764±4.7193,P＜0.05),而在癌旁肝组织和正常肝组织中的表达差异无统计学意义(P＞0.05).EphA7 mRNA的过表达与肝癌细胞的分化程度、门静脉癌栓的形成及淋巴结转移等临床病理因素有关(P＜0.05).结论 EphA7的过表达与原发性肝细胞癌的生物学行为密切相关,可能在肝癌的恶性转化、侵袭和转移过程中发挥作用.     

原发性肝细胞癌中EphA7蛋白的表达及其临床意义

目的 探讨酪氨酸蛋白激酶 EphA7 蛋白在原发性肝细胞癌中的表达及其临床意义.方法 应用免疫组化和 Western blot 方法检测 EphA7 蛋白在40例原发性肝细胞癌及相应的癌旁肝组 织和10例正常肝组织中的表达情况,并分析其与原发性肝细胞癌的临床病理因素之间的关系.结果 EphA7蛋白的表达主要位于原发性肝细胞癌细胞或肝细胞的胞质,以及纤维间隔内的血管内皮细胞.原发性肝细胞癌组织、癌旁肝组织及正常肝组织中均有EphA7蛋白的表达,Western blot分析结果显示EphA7蛋白在肝细胞癌组织(0.58±0.26)中的表达水平高于癌旁肝组织(0.40±0.22,P<0.05)和正常肝组织(0.32±0.16,P<0.05),而在癌旁肝组织和正常肝组织中的表达差异无统计学意义(P>0.05);EphA7蛋白的表达水平与原发性肝细胞癌细胞的分化程度、门静脉癌栓、淋巴结转移和甲胎蛋白水平等临床病理因素相关(P<0.05).结论 EphA7 蛋白的表达与原发性肝细胞癌的生物学行为密切相关,可能在原发性肝细胞癌的恶性转化、侵袭和转移过程中发挥重要作用.     

原发性肝癌中RUNX3的表达及其临床意义

目的 探讨RUNX3在原发性肝细胞癌巾的表达及其临床意义.方法 提取肝组织样本的总RNA(包括65例手术切除的肝癌组织及其对应的癌旁组织,6株肝癌细胞株及1株正常肝细胞株),应用实时荧光定量RT-PCR方法 检测标本中RUNX3 mRNA的表达水平,并经Western blot法验证.结果 (1)对照组(癌旁组织)RUNX3 mRNA表达量为肝癌组(癌组织)的4.2倍.41例(63.08%)肝癌组织中的RUNX3 mRNA表达水平比对照组织显著下调:下调8倍以上者17例,下调4倍以上者21例,下调2倍以上者3例.(2)66.67%(4/6)肝癌细胞株RUNX3 mRNA表达水平较正常肝细胞株明显下调.(3)RUNX3在蛋白水平和mRNA水平变化趋势基本一致.(4)在肝癌组织中 RUNX3的表达与患者肝硬化(P=0.028)及组织分型(P＜0.001)相关.结论 RUNX3基因的缺失或低表达可能在肝细胞癌发生、发展过程中起一定作用.     

Chemerin在肝细胞肝癌中的表达及其预后价值

目的 探讨Chemerin在肝细胞癌组织及人肝癌细胞株中的表达及预后价值.方法 采用免疫组化SABC法检测Chemerin蛋白在正常肝组织、肝癌及癌旁配对组织中的表达情况;采用RT-PCR方法检测肝癌组织、人肝癌细胞株以及永生化肝细胞株LO2中Chemerin mRNA的表达情况.结果 Chemerin在肝癌组织中、癌旁配对组织中、正常肝组织中表达阳性率分别为56.67％、90.00％、100％,差别具有统计学意义(P＜0.05).RT-PCR结果显示,Chemerin mRNA在癌旁配对组织中的表达高于相应的肝癌组织(P＜0.05).细胞检测结果发现,Chemerin mRNA在永生化的人肝细胞株LO2中高表达;在人肝癌细胞株中低表达.Chemerin蛋白的表达与患者性别、年龄、肿瘤大小、HBsAg状态、甲胎蛋白(AFP)水平无关,而与淋巴结转移、门静脉癌栓、肝癌分化程度以及TNM分期相关.结论 Chemerin的表达下调可能在肝癌的发生发展及侵袭转移中起重要作用,提示其可能是影响肝癌患者预后的分子标志.     

Survivin mRNA和蛋白在肝母细胞瘤组织中的表达

目的 观察肝母细胞瘤组织中Survivin mRNA与蛋白表达.方法 采用逆转录-聚合酶链反应(RT-PCR)方法检测16例肝母细胞瘤及相应癌旁组织中Survivin mRNA的表达,免疫组织化学SP法及Western blot法检测Survivin蛋白在肝母细胞瘤中的表达.结果 在肝母细胞瘤及其相应的癌旁组织中Survivin mRNA表达的阳性率分别为62.5％和11.1％,Survivin蛋白表达的阳性率分别为81.3％和22.2％,肝母细胞瘤组均远高于癌旁组,差异有统计学意义(P＜0.01);Survivin蛋白在肝母细胞瘤组织中的表达随肿瘤分期增高而增加;Ⅲ、Ⅳ期肝母细胞瘤组织Survivin mRNA 的表达量分别为2.390±0.071和4.506±0.309,明显高于早期肝母细胞瘤组织(P＜0.05).结论 Survivin 基因的高表达可能在肝母细胞瘤的发生及发展中起重要作用.     

CXC趋化因子受体2在肝细胞癌中的表达及意义

目的 探讨CXC趋化因子受体2(CXCR2)在肝细胞癌中的表达及与肝细胞癌发生、发展的关系.方法 采用半定量逆转录-聚合酶链反应(RT-PCR)、Western blot检测42例肝细胞癌组织及相应癌旁组织和23例正常肝组织中CXCR2 mRNA和蛋白表达水平,分析表达水平与肝细胞癌生物学特征的关系.结果 肝细胞癌组织、癌旁组织和正常肝组织中CXCB2 mRNA和蛋白表达分别为(1.18±0.32、0.83±0.23和0.72±0.23)和(1.78±0.20、0.98±0.13和0.90±0.18),同癌旁组织和正常肝组织比较,肝细胞癌组织中CXCR2 mRNA和蛋白表达水平明显升高(P<0.05).肝内转移、门静脉癌栓和低分化组中CXCR2 mRNA和蛋白表达水平分别为(1.37±0.26、1.45±0.34、1.31±0.28)和(1.87±0.20、1.93±0.13、1.86±0.18),无肝内转移、无门静脉癌栓和高分化组CXCR2 mRNA和蛋白表达水平分别为(1.08±0.33、1.08±0.27、1.06±0.33)和(1.73±0.18、1.73±0.20、1.71±0.19),差异有统计学意义(P<0.05).CXCR2蛋白表达与TNM分期相关,Ⅲ-Ⅳ期和Ⅰ-Ⅱ期表达水平分别为1.86±0.20和1.72±0.19,差异有统计学意义(P<0.05).结论 CXCR2在肝细胞癌组织中高表达,其高表达可能与肝细胞癌发生、侵袭和转移相关.     

Caspase-3 mRNA在原发性肝癌中的表达及其临床意义

目的探讨原发性肝细胞癌(HCC)中Caspase-3的表达水平及其与临床病理学特征之间的关系。方法采用实时荧光定量逆转录-聚合酶链反应(RT-PCR)检测手术切除的肝细胞癌患者的肝癌组织标本及癌旁肝组织标本中Caspase-3 mRNA的表达。结果肝癌组织中Caspase-3 mRNA值为(0.028±0.018),癌旁组织中的Caspase-3 mRNA值为(0.049±0.026),肝癌组织中Caspase-3 mRNA明显低于相应的癌旁肝组织中的表达(P0.01)。结论 Caspase-3 mRNA可能成为判断肝癌预后或复发转移的指标之一。     

RhoC基因在原发性肝癌中的表达及其意义

目的：探讨原发性肝癌组织及癌旁肝组织中RhoC mRNA的表达及其意义。方法：采用RT－PCR技术分析30例原发性肝癌病人的肝癌组织及癌旁肝组织中RhoC mRNA的表达。结果：肝癌组织中RhoC mRNA光密度相对值明显高于癌旁肝组织（P＜0．01）；有肝内转移灶者其癌组织中RhoC mRNA光密度相对值明显高于无肝内转移灶者（P＜0．05）。结论：RhoC mRNA的表达与原发性肝癌的转移程度可能有关，可望作为估计原发性肝癌转移的参考指标。     

MMP9、TIMP1基因在原发性肝癌中的表达

目的 探讨MMP9、TIMP1基因在原发性肝癌中的表达状况及其对肝癌侵袭转移的影响.方法 应用逆转录-聚合酶链反应(RT-PCR) 检测34例肝癌和相应癌旁组织及12例正常肝组织中MMP9、TIMP1 mRNA表达水平.结果 正常肝组织中MMP9仅有少量表达,与癌旁组织相比无显著差异;肝癌组织中MMP9表达明显升高,而TIMP1表达显著下降,两者表达状况呈负相关(P＜0.01),且两者在转移肝癌较未转移肝癌中表达水平亦有显著性差异(P＜0.05).结论 MMP9、TIMP1表达改变可能与肝癌侵袭转移的发生发展有一定关系.     

KLF8在不同肝癌细胞株及肝癌组织中的表达及其意义

目的 观察不同肝癌细胞株及肝癌组织中Krappel样因子8(KLF8)的表达,并探讨其意义.方法 用逆转录.聚合酶链反应(RT-PCR)、Western blot、免疫化学方法分别检测不同肝癌细胞株及肝(癌)组织中KLF8的mRNA和蛋白质水平.结果 KLF8的mRNA及蛋白质水平随肝癌细胞株侵袭转移潜能的增强而明显升高(P<0.05);正常肝组织(6例)、无转移肝癌组织(17例)、有转移肝癌组织(6例)中KLF8 mRNA的相对表达量分别为0.2377±0.0658、0.4683±0.2073、0.6669±0.0239(P<0.05);在正常肝组织和肝硬化组织中KLF8蛋白表达的阳性率分别为16.7%(1/6)和33.3%(2/6),均为弱阳性,在肝癌组织中强阳性率为81.8%(27/33),肝癌转移灶中强阳性率为83.3%(5/6)(P<0.01).结论 KLF8可能参与肝癌的发生和侵袭转移.     

Presenteeism and Absenteeism Before and After Total Hip and Knee Arthroplasty

BackgroundAbsenteeism is costly, yet evidence suggests that presenteeism—illness-related reduced productivity at work—is costlier. We quantified employed patients’ presenteeism and absenteeism before and after total joint arthroplasty (TJA).MethodsWe measured presenteeism (0-100 scale, 100 full performance) and absenteeism using the World Health Organization’s Health and Work Performance Questionnaire before and after TJA among a convenience sample of employed patients. We captured detailed information about employment and job characteristics and evaluated how and among whom presenteeism and absenteeism improved.ResultsIn total, 636 primary, unilateral TJA patients responded to an enrollment email, confirmed employment, and completed a preoperative survey (mean age: 62.1 years, 55.3% women). Full at-work performance was reported by 19.7%. Among 520 (81.8%) who responded to a 1-year follow-up, 473 (91.0%) were still employed, and 461 (88.7%) had resumed working. Among patients reporting at baseline and 1 year, average at-work performance improved from 80.7 to 89.4. A Wilcoxon signed-rank test indicated that postoperative performance was significantly higher than preoperative performance (P < .0001). The percentage of patients who reported full at-work performance increased from 20.9% to 36.8% (delta = 15.9%, 95% confidence interval = [10.0%, 21.9%], P < .0001). Presenteeism gains were concentrated among patients who reported declining work performance leading up to surgery. Average changes in absences were relatively small. Combined, the average monthly value lost by employers to presenteeism declined from 15.3% to 8.3% and to absenteeism from 16.9% to 15.5% (ie, mitigated loss of 8.4% of monthly value).ConclusionAmong employed patients before TJA, presenteeism and absenteeism were similarly costly. After, employed patients reported increased performance, concentrated among those with declining performance leading up to surgery.     

The German emergency and disaster medicine and management systemdhistory and present

As well for optimized emergency management in individual cases as for optimized mass medicine in disaster management, the principle of the medical doctors approaching the patient directly and timely, even close to the site of the incident, is a long-standing marker for quality of care and patient survival in Germany. Professional rescue and emergency forces, including medical services, are the “Golden Standard” of emergency management systems. Regulative laws, proper organization of resources, equipment, training and adequate delivery of medical measures are key factors in systematic approaches to manage emergencies and disasters alike and thus save lives. During disasters command, communication, coordination and cooperation are essential to cope with extreme situations, even more so in a globalized world. In this article, we describe the major historical milestones, the current state of the German system in emergency and disaster management and its integration into the broader European approach.     

Tendon and Ligament Healing and Current Approaches to Tendon and Ligament Regeneration

Ligament and tendon injuries are common problems in orthopedics. There is a need for treatments that can expedite nonoperative healing or improve the efficacy of surgical repair or reconstruction of ligaments and tendons. Successful biologically-based attempts at repair and reconstruction would require a thorough understanding of normal tendon and ligament healing. The inflammatory, proliferative, and remodeling phases, and the cells involved in tendon and ligament healing will be reviewed. Then, current research efforts focusing on biologically-based treatments of ligament and tendon injuries will be summarized, with a focus on stem cells endogenous to tendons and ligaments. Statement of clinical significance: This paper details mechanisms of ligament and tendon healing, as well as attempts to apply stem cells to ligament and tendon healing. Understanding of these topics could lead to more efficacious therapies to treat ligament and tendon injuries. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:7–12, 2020     

Work and career experiences and emotional well-being of managerial and professional women

This study examined a research model developed to understand emotional well-being among managerial and professional women. Data were collected from 792 women using questionnaires completed anonymously. Although considerable diversity was present in the sample, most women were in early career, married but still without children. Four groups of predictor variables identified in previous research were considered: personal demographic variables. Organizational and situational characteristics, work experiences associated with job and career satisfaction and work outcomes. Work experiences and work outcomes were fairly consistently and significantly related to self-reported emotional well-being. Implications for managerial women and their employing organizations are offered.