胃癌组织中PTEN，DcR3，CyclinE的表达及其相互关系

目的：研究PTEN,DcR3,CyclinE在胃癌组织中的表达及其与胃癌发生发展的关系。方法：收集75例随访资料完整的胃癌手术切除标本及15例正常胃组织标本,常规HE染色及应用免疫组织化学方法检测PTEN,DcR3,CyclinE在胃癌组织中的表达。结果：PTEN在胃癌组织中低表达,并随肿瘤浸润深度的加深、淋巴转移的发生及临床分期的增高而降低;DcR3及CyclinE在胃癌组织中高表达,并随肿瘤浸润深度的加深、淋巴转移的产生、临床分期的提高、肿瘤病理分化程度的降低而升高。结论：PTEN与DcR3,CyclinE在胃癌的发生发展中有相互制约或促进作用;各自都可以作为胃癌生物学行为和判断预后的指标。     

PTEN、Fas／FasL和DCR3在胃癌组织中的表达及其临床意义

目的:研究PTEN、Fas/FasL和DCR3在人胃癌组织中的表达,初步探讨三者与胃癌的发生、癌细胞增殖和侵袭转移的关系及其临床意义.方法:采用链霉素抗生物素蛋白-过氧化酶连接(SP)免疫组织化学方法检测 75例胃癌标本黏膜组织中PTEN、Fas/FasL和DCR3蛋白的表达,15例胃溃疡或十二指肠溃疡患者胃黏膜组织作为正常对照组.结果:胃癌组织中DCR3的表达率显著高于正常胃黏膜组织,PTEN及Fas/FasL的表达率则低于正常胃黏膜组织,差异均有统计学意义(P<0.01); DCR3与Fas/FasL、PTEN的表达呈负相关(P<0.001),PTEN与Fas/FasL的表达呈正相关(P<0.001,r= 0.401),三者的阳性表达率与肿瘤淋巴转移、临床分期、肿瘤病理分化程度及浸润深度密切相关,与性别、年龄及肿瘤大小无关(P>0.05).结论:DCR3、PTEN及Fas/FasL在胃癌的发生发展及浸润转移中存在着相互制约的关系.检测三者在胃癌中的表达,有助于从不同角度判断胃癌的恶性生物学行为; DCR3、PTEN及Fas/FasL有可能成为胃癌临床诊断、判断疗效及监测预后的可靠指标.     

PTEN、Fas和DCR3在胃癌组织中的表达及其临床意义

目的 研究PTEN、Fas和DCR3在人体胃癌组织中的表达,探讨三者与胃癌的发生、癌细胞增生和侵袭转移的关系.方法 采用链霉素抗生物素蛋白-过氧化酶连接(SP)免疫组织化学方法检测75例胃癌标本黏膜组织中PTEN、Fas和DCR3蛋白的表达,胃溃疡或十二指肠溃疡患者胃黏膜组织作为正常对照组.结果 胃癌组织中DCR3的表达率显著高于正常胃黏膜组织,PTEN及Fas的表达则低于正常胃黏膜组织,差异均有统计学意义(P<0.01);DCR3与Fas、PTEN的表达呈负相关(r=-0.720,P<0.001;r=-0.336,P<0.001),FFEN与Fas的表达呈正相关(r=0.401,P<0.001),三者的阳性表达率与肿瘤淋巴结转移、临床分期、病理分化程度及浸润深度密切相关,与性别、年龄及肿瘤大小无关(P>0.05).结论 DCR3、PTEN及Fas在胃癌的发生、发展及浸润转移中存在着相互制约的关系.检测三者在胃癌中的表达,有助于从不同角度判断胃癌的恶性生物学行为;DCR3、PTEN及Fas有可能成为胃癌临床诊断、判断疗效及监测预后的可靠指标.     

Survivin和Runx3蛋白在胃癌组织中的表达及其临床意义

目的:探讨Survivin和Runx3蛋白在胃癌组织中的表达情况及临床意义。方法:应用免疫组织化学SP法检测52例手术切除胃癌组织中Survivin和Runx3蛋白的表达水平,分析二者的表达与临床病理特征之间的关系。结果:胃癌组织中Runx3阳性表达率53.8%,与胃癌的肿瘤浸润深度、淋巴转移、远隔转移、临床分期呈负相关(P<0.05)。胃癌组织中Survivin阳性表达率78.8%,与胃癌的肿瘤浸润深度、淋巴转移、临床分期呈正相关(P<0.05)。结论:在胃癌组织中Survivin高表达、Runx3低表达与胃癌的发生发展密切相关,联合检测Survivin和Runx3蛋白对于胃癌的治疗具有指导意义,也可作为判断胃癌预后的参考指标。     

胃癌组织中 PTEN、VEGF 和 MMP2 表达及其临床意义

目的：探讨PTEN、VEGF和MMP2在胃癌组织中的表达及其临床意义。方法：采用免疫组化sP技术检测80例胃癌组织中PTEN、VEGF和MMP2表达。结果：胃癌组织中PTEN高表达率43．8％，与肿瘤分化程度、浸润深度、淋巴结转移和肿瘤分期显著相关。VEGF、MMP2阳性表达率分别为60．O％和51．3％，与肿瘤大小、浸润深度、淋巴结转移和肿瘤分期显著相关。胃癌组织中PTEN与VEGF和MMP2表达显著负相关，与病人预后相关，Kaplan—Meier生存曲线显示PTEN高表达者术后累计生存率显著高于低表达者；VEGF和MMP2阳性表达者术后累计生存率显著低于阴性表达者。结论：PTEN通过调控胃癌组织VEGF和MMP2表达，抑制胃癌的浸润和转移，改善病人预后。     

胃癌组织中PTEN、VEGF和MMP2表达及其临床意义

目的：探讨PTEN、VEGF和MMP2在胃癌组织中的表达及其临床意义。方法：采用免疫组化sP技术检测80例胃癌组织中PTEN、VEGF和MMP2表达。结果：胃癌组织中PTEN高表达率43．8％，与肿瘤分化程度、浸润深度、淋巴结转移和肿瘤分期显著相关。VEGF、MMP2阳性表达率分别为60．O％和51．3％，与肿瘤大小、浸润深度、淋巴结转移和肿瘤分期显著相关。胃癌组织中PTEN与VEGF和MMP2表达显著负相关，与病人预后相关，Kaplan—Meier生存曲线显示PTEN高表达者术后累计生存率显著高于低表达者；VEGF和MMP2阳性表达者术后累计生存率显著低于阴性表达者。结论：PTEN通过调控胃癌组织VEGF和MMP2表达，抑制胃癌的浸润和转移，改善病人预后。     

胃癌组织中RUNX3的表达与c-Met的相关性研究

目的:探讨RUNX3及c-Met在胃癌组织中的表达以及与胃癌临床病理特征之间的关系。方法:以56例胃癌患者为研究对象,采用SP免疫组化法研究RUNX3及c-Met在正常胃黏膜及不同分期,不同分化程度各组胃癌标本中的表达。结果:胃癌组织中RUNX3的表达明显降低,c-Met的表达显著提高。RUNX3、远隔转移、临床分期呈正相关,与肿瘤分化程度、肿瘤大小、患者性别、年龄无相关性。RUNX3与c-Met的表的表达与胃癌浸润深度、远隔转移、临床分期呈负相关(P<0.05),与胃癌病理分化程度呈正相关,与胃癌病灶大小,淋巴结有无转移,患者性别,年龄无相关性。c-Met的阳性表达率与胃癌的浸润深度、淋巴转移达有相关性(P<0.05)。结论:胃癌组织中RUNX3表达下调,提示其在胃癌发生,发展中起重要作用,c-Met的表达与RUNX3表达的存在相关性。     

Survivin和Runx3蛋白在胃癌组织中的表达及其临床意义

目的：探讨Survivin和Runx3蛋白在胃癌组织中的表达情况及临床意义。方法：应用免疫组织化学SP法检测52例手术切除胃癌组织中Survivin和Runx3蛋白的表达水平,分析二者的表达与临床病理特征之间的关系。结果：胃癌组织中Runx3阳性表达率53.8%,与胃癌的肿瘤浸润深度、淋巴转移、远隔转移、临床分期呈负相关（P〈0.05）。胃癌组织中Survivin阳性表达率78.8%,与胃癌的肿瘤浸润深度、淋巴转移、临床分期呈正相关（P〈0.05）。结论：在胃癌组织中Survivin高表达、Runx3低表达与胃癌的发生发展密切相关,联合检测Survivin和Runx3蛋白对于胃癌的治疗具有指导意义,也可作为判断胃癌预后的参考指标。     

PTEN及P53蛋白在胃癌中的异常表达及临床意义

目的:探讨胃癌组织中抑癌基因PTEN及P53蛋白的异常表达及其临床意义.方法:采用免疫组织化学SP法检测40例胃癌及20例胃炎组织中PTEN及P53的表达.结果:PTEN在胃癌组织中的表达缺失率为58%,明显高于胃炎(5%)中的表达缺失率(P＜0.05),表达缺失率与胃癌的浸润深度、淋巴结转移、临床分期密切相关(P＜0.05),与分化程度无关(P＞0.05).P53在胃癌组织中的阳性表达率为73%,明显高于胃炎(10%)的阳性表达率( P＜0.05),阳性率与胃癌的浸润深度、淋巴结转移、临床分期密切相关(P＜0.05),与分化程度无关(P＞0.05).在35例P53表达阳性的胃癌组织中,24例PTEN表达为阴性;在13例P53表达阴性的胃癌组织中,仅3例PTEN表达为阴性(P＜0.05).结论:胃癌组织中P53的表达明显升高,而PTEN的表达明显下降,可能与胃癌的发生发展有关.     

诱捕受体3在胃癌中的表达及其临床意义

目的探讨诱捕受体3（DcR3）基因在胃癌组织中的表达及其与胃癌临床病理特征之间的关系。方法采用PT—PCR方法检测41例胃癌组织和41例癌旁正常组织中DcR3的表达，分析其与多种临床病理特征之间的关系。结果41例胃癌组织中DcR3阳性表达率为56％（23／41）。41例癌旁正常胃组织中发现3例DcR3的阳性表达。癌组织DcR3mRNA的表达水平明显高于正常胃黏膜组织（P〈0．01）。DcR3的表达与胃癌的分化程度（X）、淋巴结转移（X2）及TNM分期（X3）显著相关，与患者肿瘤部位及浸润深度等无相关性（P〉0．10）。其多元化线性回归方程为Y=0．432—0．208X1＋0．098X2＋0．086X3。结论DcR3在胃癌组织中具有较高的表达率，其异常表达可促进胃癌的发生、发展。DcR3的基因检测可作为判断胃癌分化、浸润、转移、分期的重要参考指标。     

Selenium, lycopene, alpha-tocopherol, beta-carotene, retinol, and subsequent bladder cancer

To examine the association between serum nutrients and the development of bladder cancer we measured selenium, alpha-tocopherol, lycopene, beta-carotene, retinol, and retinol-binding protein in serum collected from 25,802 persons in Washington County, MD, in 1974. Serum samples were kept frozen at -70 degrees C. In the subsequent 12-year period, 35 cases of bladder cancer developed among participants. Comparisons of serum levels in 1974 among cases and two matched controls for each case showed that selenium was significantly lower among cases than controls (P = 0.03), lycopene was lower among cases at a borderline level of significance (P = 0.07), and alpha-tocopherol was nonsignificantly lower (P = 0.13). For selenium there was a nearly linear increase in risk with decreasing serum levels (P = 0.03). When examined by tertiles, the odds ratio associated with the lowest tertile of selenium compared to the highest tertile was 2.06. Serum levels of retinol, retinol-binding protein, and beta-carotene were similar among cases and controls. These results support a role for selenium in the prevention of bladder cancer.     

Susceptibility of Ureaplasma urealyticum to Tetracycline,Doxycycline, Erythromycin,Roxithromycin, Clarithromycin,Azithromycin, Levofloxacin and Moxifloxacin

Abstract

The in vitro activity of tetracycline, doxycycline, erythromycin, roxithromycin, clarithromycin, azithromycin, levofloxacin and moxifloxacin was tested against 63 clinical isolates of Ureaplasma urealyticum. The minimal inhibitory concentrations (MICs) and the minimal bactericidal concentrations (MBCs) were determined by the broth microdilution method in A7 medium. The miC50 and miC90 of the tested agents after 24 h of incubation were as follows: Tetracycline, 0.5 and 2.0 μg/ml; doxycycline, 0.125 and 0.25 μg/ml; erythromycin, 2.0 and 8.0 μg/ml; roxithromycin, 2.0 and 4.0 μg/ml; clarithromycin, 0.25 and 1.0 μg/ml; azithromycin, 2.0 and 4.0 μg/ml; levofloxacin, 1.0 and 2.0 μg/ml; and moxifloxacin, 0.5 and 0.5 μg/ml, respectively. The MIC values after 24 h and 48 h incubation differed by no more than one dilution for all the agents with the exception of doxycycline (two dilution difference for MIC₉₀). Overall, moxifloxacin was the most active agent in vitro against U. Urealyticum, with the narrowest difference between MIC and MBC values, followed closely by levofloxacin. Clarithromycin was the most active macrolide.     

80岁以上合并肠梗阻的结直肠癌患者的外科治疗

目的 探讨80岁以上合并肠梗阻的结直肠癌患者的外科治疗策略。方法 回顾性分析中国医学科学院结直肠外科2007年1月—2018年12月行结直肠癌手术且术前合并肠梗阻的77例80岁以上患者的临床病理资料,按照手术方式分为根治组（n=58）与非根治组（n=19）,比较两组患者临床病理特征、围手术期相关指标和预后。采用Kaplan-Meier法进行生存分析,Log rank检验进行生存时间比较;应用Cox比例风险模型进行多因素分析,对影响预后的因素进行分析。结果 根治组TNM分期为Ⅳ期患者的比例明显低于非根治组（8.6% vs. 57.9%, P<0.001）。根治组患者的5年生存率明显高于非根治组（65.5% vs. 26.3%, P<0.001）。单因素分析显示TNM分期和是否行根治性手术与合并肠梗阻的老年结直肠癌患者预后相关。多因素分析表明是否行根治性手术是影响80岁以上合并肠梗阻的结直肠癌患者预后的独立因素。结论 是否行根治性手术是影响80岁以上合并肠梗阻的结直肠癌患者预后的独立因素。     

Cholesterol, weight, height, Quetelet's index, and colon cancer recurrence

The association of low serum cholesterol with colon cancer mortality suggests that low serum cholesterol promotes colon cancer recurrence. We compared cumulative 5-year recurrence-free rates of 279 colon cancer patients in relation to serum cholesterol, weight, height, and Quetelet's index. The median value for each variable was used to divide patients into those above the median, or at the median and below. Patients with median and lower serum cholesterol exhibited an 11% lower disease-free rate at 5 years. Patients above median weight were at significantly increased risk of recurrence in both sexes (76 vs 54%, z = 3.0026, p = 0.003). Progressively decreasing weight was noted with advancing stage in males but not in females. Women above median Quetelet's index were also at significantly greater risk of recurrence (74 vs 52%, z = 2.6109, p = 0.009). Patients above median height were at insignificantly increased risk of recurrence. This study indicates that body weight is a significant prognostic factor for patients with colon cancer.     

Fat, fiber, fruits, vegetables, and risk of colorectal adenomas

A case-control study was conducted at the National Naval Medical Center (Maryland, USA) from 1994 to 1996 to investigate the possible association between dietary factors and colorectal adenomas. Cases (n = 239) were subjects diagnosed with adenomas (146 new and 93 recurrent) by sigmoidoscopy or colonoscopy. Those with no evidence of adenomas found by sigmoidoscopy were recruited as controls (n = 228). Dietary variables, assessed by a 100-item food frequency questionnaire, were analyzed by the logistic regression model, which was adjusted for age, gender and total energy intake. Variables of fat intake were further adjusted for red meat intake. An increased risk of 7% [odds ratio (OR): 1.07; 95% confidence interval (95% CI): 0.94-1.22] per 5% energy/day from total fat was observed. Every additional 5% unit of oleic acid intake/day significantly increased the adenoma risk by 115% (OR: 2.15; 95% CI: 1.05-4.39). Red meat fat increased the risk by 20% (OR: 1.20; 95% CI: 0.71-2.04), and white meat fat decreased the risk by 67% (OR: 0.33; 95% CI: 0.19-0.95) for every additional 5% unit of respective intake/day. Risk decreased by 41% (OR: 0.59; 95% CI: 0.41-0.86) for every additional 5% unit of fiber intake/day. Vegetable [OR per 100 g of vegetable intake/day: 0.83, 95% CI: 0.67-1.04] and fruit (OR per 100 g of fruit intake/day: 0.92, 95% CI: 0.82-1.03) intake showed an inverse association, and the results are suggestive of an association with the risk for adenomas. In conclusion, a strong positive association between oleic acid intake and colorectal adenoma risk was observed. This is likely to be an indicator of "unhealthy" food (meat, dairy, margarine, mayonnaise, sweet baked food) consumption in this population. Increased intake of dietary fiber was associated with a moderately decreased risk of adenomas.