Impact of p73 gene polymorphism on cancer susceptibility: a meta analysis

Previous studies examining the association between p73 G4A and gastric cancer risk have produced inconsistent results. The objective of this study was to clarify whether p73 G4A plays a major role in the development of gastric cancer. Studies that had examined the association between p73 G4A and gastric cancer risk were identified through PubMed, Science Direct, and CNKI. We selected eligible studies based on inclusion criteria. Odds ratios were estimated using distinct genetic models, and the heterogeneity between studies was explored using Cochran’s Q statistic along with the I² statistic. Overall, we found no evidence of a significant association between p73 G4A and risk of gastric cancer. A same trend was also indicated in subgroup analysis by ethnicity. The heterogeneity tests revealed that there was no significant heterogeneity across studies. Our meta-analysis indicates that p73 G4A might not have a major effect on risk of gastric cancer. A much larger study is required to validate our findings.     

Gastric metastasis of hepatocellular carcinoma via a possible existing retrograde hematogenous pathway

Background and Aim: Hepatocellular carcinoma (HCC) tends to metastasize to extrahepatic organs. Stomach involvement has been seldom reported and has always been considered as direct invasion. This study aims to propose a possible existing pathway for the hematogenous metastasis of HCC to the stomach. Methods: Only seven cases with stomach involvement were found from 8267 HCC patients registered at our hospital between 2000 and 2007. Their laboratory data, the findings of computed tomography and upper endoscopy, therapeutic procedures, such as esophageal variceal banding ligation (EVL), and transhepatic arterial embolization (TAE) were further studied. Results: All seven patients were male. Liver cirrhosis was found in six patients (6/7 = 85.7%), HCC with portal vein thrombosis (PVT) in six patients (6/7 = 85.7%), splenomegaly in five patients (5/7 = 71.4%) and esophageal varices in five patients (5/7 = 71.4%). Six patients underwent TAE and one patient underwent EVL before the development of HCC in the stomach. Four patients had HCC at the cardia, one patient at the anterior wall of the high body and two patients at the greater curvature of the high body, far away from the original HCC. Six patients eventually developed distant metastasis. HCC with gastric metastasis developed 53–126 days after TAE in five patients and 74 days after EVL in one patient. Conclusions: When cirrhotic patients with portal hypertension have HCC with PVT, a hematogenous pathway can exist for gastric metastasis of tumor thrombi involving hepatofugal flow to the stomach after TAE or EVL apart from the major pathway of direct invasion.     

五味子影响黄药子肝肾毒性的实验观察

目的观察五味子与黄药子合用时,对黄药子所致生化及肝肾病理改变的缓解作用。方法对比黄药子组、拮抗组小鼠在给药60d后观察肝脏生化指标、病理。结果拮抗各剂量组对相应剂量黄药子所致的ALT升高及病理改变有明显的缓解和抑制作用。     

青岛市25家大型洗浴场所卫生状况调查

目的：了解带有休闲餐饮功能的较大规模洗浴场所卫生状况。方法：抽查25家该类洗浴场所,制定洗浴场所专项检查登记表进行调查。同时采样检测公共用具875份,按《公共场所卫生标准检验方法》、《公共浴室卫生标准》进行检测、评价。结果：25家单位,健康、培训证持证率92.27%;卫生管理组织制度健全率84%,卫生管理建档率76%,警示标志设有率100%;食品卫生许可证持有率80%;公共用具消毒总合格率86.29%,其中浴服合格率最高,拖鞋合格率最低。结论：公共用具特别是拖鞋的消毒有待于进一步规范。洗浴场所内配套的食品餐饮卫生应引起重视。     

针刺后溪穴治疗中风偏瘫上肢手指拘挛40例

目的:观察针刺后溪穴治疗中风偏瘫上肢手指拘孪的临床疗效。方法:对40例患者针刺患侧后溪穴,并向合谷方向透刺,以局部酸、麻、胀、重至整个掌部为度,5次为一疗程,共4个疗程。结果:显效8例,好转23例,有效7倒,无效2例,总有效率95％。结论:针刺后溪穴治疗中风偏瘫上肢手指拘挛疗效确切。     

单克隆抗体MGb2和LAK细胞的协同抗胃癌作用

本研究探讨了成纤维细胞介导的G-CSF基因疗法联合应用IL-2基因疗法及时对小鼠I期肾癌的治疗作用。经NIH3T3-IL-2基困疗法．NIH3T3-G-CSF基因疗法单独治疗后的荷瘤小鼠存话期明显延长，而经以上两者联合治疗后的荷癌小鼠存活期的延长更为明显，且有75％荷瘤小鼠长期存活。对经G-CSF基因疗法及IL-2基因疗法联合治疗后的荷瘤小鼠体内抗肿瘤免疫功能的检测表明，经治疗后第14天，荷瘤小鼠睥脏明显增大，睥脏淋巴细胞数量明显增多；肿瘤局部的常规病理检查可见数量较多的嗜酸性粒细胞浸润。荷瘤小鼠睥细胞NK活性、经诱导后的LAK话性及CTL，杀伤活性均明显升高，小鼠腹腔巨噬细胞杀伤活性在NIH3T3-IL-2基因疗法治疗组升高．而在NIH3T3-G-CSF基因疗法组未见明显升高。以上结果表明．联合应用成纤维细胞介导的G-CSF基因疗法与IL-2基因疗法可因对小鼠体内抗肿瘤免疫功能的联合增强作用而取得更佳的抗肿瘤效果。     

Activation of a LTR-retrotransposon by telomere erosion

Retrotransposons can facilitate repair of broken chromosomes, and therefore an important question is whether the host can activate retrotransposons in response to chromosomal lesions. Here we show that Ty1 elements, which are LTR-retrotransposons in Saccharomyces cerevisiae, are mobilized when DNA lesions are created by the loss of telomere function. Inactivation of telomerase in yeast results in progressive shortening of telomeric DNA, eventually triggering a DNA-damage checkpoint that arrests cells in G2/M. A fraction of cells, termed survivors, recover from arrest by forming alternative telomere structures. When telomerase is inactivated, Ty1 retrotransposition increases substantially in parallel with telomere erosion and then partially declines when survivors emerge. Retrotransposition is stimulated at the level of Ty1 cDNA synthesis, causing cDNA levels to increase 20-fold or more before survivors form. This response is elicited through a signaling pathway that includes Rad24, Rad17, and Rad9, three components of the DNA-damage checkpoint. Our findings indicate that Ty1 retrotransposons are activated as part of the cellular response to telomere dysfunction.     

Gene expression profile differences in high and low metastatic human ovarian c ancer cell lines by gene chip

目的：用基因芯片技术研究高低转移人卵巢癌细胞系（HO-8910PM和HO-8910）基因表达谱差异,筛选与转移相关的基因。方法：按一步法分别抽提高低转移人卵巢癌细胞和对照正常卵巢组织的总RNA并纯化mRNA;分别将等量的高低转移人卵巢癌细胞及对照组织的mRNA逆转录合成以Cy5和Cy3标记的cDNA一链做探针,分别混合后在2张含有4096条双点人类全长基因的芯片上进行杂交。经洗片后用ScanArray3000扫描仪扫描芯片荧光信号图像,用ImaGene3.0软件对扫描图像进行数字化处理,计算机分析高低转移人卵巢癌细胞系之间及与正常卵巢上皮基因表达谱差异。结果：人卵巢癌细胞系HO-8910细胞与正常卵巢上皮比较差异3倍以上共有355个基因。高转移人卵巢癌细胞系HO-8910PM细胞与正常卵巢上皮比较差异3倍以上共有323个基因。高转移人卵巢癌细胞系HO-8910PM与母系HO-8910比较差异2倍以上共有165个基因,其中两株细胞系比较差异3倍以上共有21个基因。结论：两株人卵巢癌细胞系与正常卵巢上皮细胞基因表达谱存在差异,提示这些基因与卵巢癌的发生和发展及高转移特性有关。本实验说明利用基因芯片对基因表达谱的检测可以为人体卵巢癌的基因诊断、治疗和预防提供新的方向。