Analysis of the correlation between P27 expression and Helicobacter pylori infection in gastric cancer

We aimed to explore the correlation between P27 expression and Helicobacter pylori (H. pylori) infection in gastric cancer, so as to provide evidence for understanding the pathogenesis of gastric cancer caused by H. pylori infection. A total of 82 samples of gastric cancer tissues and 56 samples of tumor-adjacent normal tissues collected from the gastrectomy were enrolled in this study. Then, 14C-urease breathing test was carried out to evaluate the infection of H. pylori in gastric cancer tissues, the expression of P27 in the tissue samples was detected by the immunohistochemistry staining, and the correlation between the H. pylori infection and P27 expression in gastric cancer was analyzed. Of 82 gastric cancer patients, there were 53 patients with H. pylori infection (64.63%). Among the patients with highly or moderately differentiated gastric cancer, the expression of P27 was much higher than that of patients with poorly differentiated gastric cancer (p < 0.01). Besides, comparison of the P27 expression between males and females, among different age groups, tumor sizes, TNM stages, tumor infiltration degrees, or lymph node metastasis, showed no significant differences (p > 0.05). Analysis of the correlation revealed that P27 expression was negatively correlated with the infection of H. pylori (p < 0.01). Multifactorial logistics regression analysis indicated that tumor differentiation was a risk factor of P27-positive expression in gastric cancer tissues (p < 0.01). In addition, P27 expression in the gastric cancer tissues was lower than that in the tumor-adjacent normal tissues (p < 0.01). In gastric cancer patients, expression of P27 is correlated with H. pylori infection which, via downregulating P27, can cause the cancerization of gastric mucosa, and P27, for its role in the development and progression of gastric cancer, is a potential auxiliary indicator for clinical diagnosis whether gastric cancer is complicated with H. pylori infection. So, P27 is a key indicator for diagnosis, treatment, and prognostic evaluation of disease in the advanced stage.     

Hormetic effects of noncoplanar PCB exposed to human lung fibroblast cells (HELF) and possible role of oxidative stress

Hormesis, a biphasic dose–response phenomenon, which is characterized by stimulation of an end point at a low‐dose and inhibition at a high‐dose. In the present study we used human lungs fibroblast (HELF) cells as a test model to evaluate the role of oxidative stress (OS) in hormetic effects of non coplanar PCB 101. Results from 3‐(4,5‐dime‐thylthiazol‐2‐yl)‐2,5‐diphenyltetrazo‐lium bromide (MTT) assay indicated that PCB101 at lower concentrations (10^?5 to 10^?1 μg mL^?1) stimulated HELF cell proliferation and inhibited at high concentrations (1, 5, 10, and 20 μg mL^?1) in a dose‐ and time‐dependent manner. Reactive oxygen species (ROS), malondialdehyde (MDA) and superoxide dismutase (SOD) (except 48 h) showed a significant increase at higher concentrations of PCB 101 than those at the lower concentrations with the passage of time. Antioxidant enzymes such as glutathione peroxidase (GSH‐Px) exhibited decreasing trends in dose and time dependent manner. Lipid peroxidation assay resulted in a significant increase (P < 0.05) of MDA level in PCB 101‐treated HELF cells compared with controls, suggesting that OS plays a key role in PCB 101‐induced toxicity. Comet assay indicated a significant increase in genotoxicity at higher concentrations of PCB 101 exposure compared to lower concentrations. Overall, we found that HELF cell proliferation was higher at low ROS level and vice versa, which revealed activation of cell signaling‐mediated hormetic mechanisms. The results suggested that PCB 101 has hormetic effects to HELF cells and these were associated with oxidative stress. © 2014 Wiley Periodicals, Inc. Environ Toxicol 30: 1385–1392, 2015.     

常规消毒对ProTaper镍钛根管锉抗拉强度的影响

目的 探讨超声清洗时间和消毒灭菌频率对镍钛根管锉的抗拉性能的影响,以了解超声清洗和高温高压消毒灭菌法在镍钛根管锉灭菌中应用的安全性和可行性.方法 采用全新的ProTaper S2锉和F2锉各25支,分为5组:标准组(未处理)、对照组(未超声-高压灭菌)、A组(超声震荡50 min+高压灭菌5次)、B组(超声震荡100 min+高压灭菌10次)、C组(超声震荡150 min+高压灭菌15次),分别用万能测试仪对其进行抗拉伸强度的性能试验.结果 S2及F2的标准组之间的抗拉伸强度差异无统计学意义(P>0.05),提示样本间不存在差异性;经不同时间超声清洗及不同次数高温高压处理的S2镍钛锉抗拉伸强度测试结果显示:对照组、A组、B组、C组分别为(76.58±4.87)MPa、(71.00±5.39)MPa、(72.33±3.43)MPa、(66.81±4.08)MPa;F2镍钛锉抗拉伸强度结果分别为:(111.75±6.83)MPa、(110.46±3.88)MPa、(107.29±3.89)MPa、(94.53±6.61)MPa;A、B组与对照组的ProTaper S2锉和F2锉的抗拉强度差异均无统计学意义(P>0.05),即镍钛锉经超声震荡50 min+高压灭菌5次及超声震荡100 min+高压灭菌10次消毒后,其抗拉伸强度无明显影响;C组与对照组间差异存在统计学意义(P<0.05),即镍钛锉经超声震荡150 min+高压灭菌15次消毒后,对其抗拉伸强度有影响.结论 常规超声-高压灭菌消毒超过一定频率可能增加ProTaper系统镍钛根管锉折断可能性.     

探讨健康教育护理路径干预在对慢性化脓性中耳炎患者睡眠质量和护理满意度的影响

目的分析健康教育护理路径干预在对慢性化脓性中耳炎患者睡眠质量和护理满意度的影响。方法此次研究对象为我院2019年4月~2020年4月期间收治的58例慢性化脓性中耳炎患者,以随机数字表法分对照组和观察组,每组29例,观察两组睡眠质量与护理满意度。与本研究,按照护理方法的差异将其分为对照组与观察组,每组39例,对两组护理前后的心理状态进行比较。结果护理后,观察组匹茨堡睡眠质量指数量表(PSQI)评分低于对照组,且护理满意度高于对照组(P<0.05)。结论在慢性化脓性中耳炎患者中实施健康教育护理路径干预,可促进患者睡眠质量与护理满意度的提升。     

2%碳酸氢钠对机械通气患者气道湿化效果的研究

目的：观察2%碳酸氢钠对机械通气患者气道湿化的效果。方法：将46例患者随机分成观察组和对照组,对照组用传统方法配制的湿化液湿化,观察组用2%的碳酸氢钠溶液进行气道湿化,用药后对两组痰液黏稠度转化时间进行观察。结果：在痰液黏稠度转化时间方面,观察组明显优于对照组（P〈0.05）。结论：采用2%碳酸氢钠溶液可有效稀释痰液,且不良反应小,具有推广价值。     

天津市城市社区护士继续教育培训现状分析与对策研究

通过对天津市城市社区护士继续教育培训现状的调查和分析。发现和总结天津市城市社区护士继续教育培训中的一些问题,提出根据实际需求开发培训项目;加强行政管理和纪律约束,绩效综合考评;统筹兼顾合理安排,解决工学矛盾;加强培训项目内容的实践性;以案例为中心,灵活多种教学方式。进一步完善城市社区护士继续教育培训运行机制与管理模式,提高天津市城市社区护士继续教育培训水平,满足社区卫生服务发展的需要。     

A Preliminary Study on the Occurrence and Dissipation of Estrogen in Livestock Wastewater

Livestock wastewater has high estrogen activity because animal excreta contain estrogen. In the past, when biological technologies were applied to treat livestock wastewater, the removal efficiency of estrogen pollutants was always ignored. Therefore, the efficiency of estrogen removal by anaerobic/aerobic (A/O) treatment and by up flow anaerobic sludge blanket and step-fed sequencing batch reactor (UASB–SFSBR) treatment was investigated in the present study. The results showed that the A/O treatment had no significant estrogenic removal ability, whereas the removal rates of estrogen after UASB–SFSBR treatment reached approximately 78 %, as measured by liquid chromatography and tandem mass spectrometry. The estrogen concentration decreased from 31.5 ng/L to an undetectable level according to the yeast estrogen screen analysis. We found differences between the estrogen removal rates measured by the chemical assay and those measured using the bioassay. More attention must be paid to the removal of estrogen pollutants in livestock wastewater to reduce the environmental risk.     

老年晚期结直肠癌患者术后早期中医辨证分型及预后标志物表达情况分析

目的:分析老年晚期结直肠癌患者术后早期中医辨证分型情况及预后标志物表达情况。方法:选择2014年1月至2016年1月就诊的80例老年晚期结直肠癌患者,对其术后早期症状进行中医辨证分型,同时分析不同证型患者术后预后标志物表达情况。结果:老年结直肠癌患者术后早期中医证型中,湿热瘀毒型及肝肾阴虚型分别占30%及31.25%,明显高于其他3种证型,差异有统计学意义(P0.05);湿热瘀毒型及肝肾阴虚型患者术后血清癌胚抗原(CEA)、糖类抗原125(CA_(125))水平及肿瘤特异性生长因子(TSGF)阳性表达率明显高于其他3种证型,差异有统计学意义(P0.05);脾肾两虚型及肝肾阴虚型患者Karnofsky评分≤70分比例明显高于其他3种证型,差异有统计学意义(P0.05)。结论:湿热瘀毒及肝肾功能的变化预示结直肠癌患者预后不良。     

北京市结膜炎症状发生现状及相关知识行为的调查

采用多阶段分层抽样和自行设计的问卷对北京市6个城区12 890名18岁以上居民调查,旨在了解成年居民结膜炎症状发生现况及相关知识行为因素.北京市居民2011年结膜炎症状报告率为1.60％,不同城区、年龄、文化、性别和民族的居民组间报告率差异无统计学意义（P＞0.05）.健康状况差、外出回家后不洗手、与他人共用毛巾是居民患结膜炎的危险因素.相关部门应采取健康教育、行为干预等综合措施促进居民形成健康的行为模式,降低结膜炎的发生.     

阻塞性睡眠呼吸暂停低通气综合征患者血浆脑钠素的变化

目的观察单纯阻塞性睡眠呼吸暂停低通气综合征（OSAHS）和OSAHS合并高血压患者的血浆脑钠素（BNP）水平的变化。方法受试者共61例,均给予多导睡眠监测并测量血压。受试者分为3组：单纯OSAHS组,OSAHS合并高血压组,正常对照组。血浆BNP采用放射免疫法测定。结果单纯OSAHS组及OSAHS合并高血压组血浆BNP较对照组显著增高（P〈0.01）;OSAHS合并高血压组血浆BNP较单纯OSAHS组增高（P〈0.05）。结论BNP在OSAHS的发病中可能起着重要作用。