The oncogenic impact of RNF2 on cell proliferation,invasion and migration through EMT on mammary carcinoma

Mammary carcinoma (MC) is one of most common malignancy in women, and ring finger protein 2 (RNF2) possesses various roles in vast human tumors. In MC tissues as well as in cell lines RNF2 exhibited high expression, had significant association with tumor size, lymph node status, TNM stage, patients’ poor survival, and promoted cell proliferation, colony formation, cell migration and invasion of MC cell lines which was mediated by downregulation of E-cadherin protein. These data reveal that RNF2 protein plays a vital role in the development of MC and may be a potential therapy target of MC.     

Genetic and epigenetic alterations of the EGFR and mutually independent association with BRCA1, MGMT,and RASSF1A methylations in Vietnamese lung adenocarcinomas

Genetic and epigenetic alterations importantly contribute to the pathogenesis of lung cancer. In the study, we measured the frequency and distribution of molecular abnormalities of EGFR as well as the aberrant promoter methylations of BRCA1, MGMT, MLH1, and RASSF1A in Vietnamese lung adenocarcinomas. We investigated the association between genetic and epigenetic alteration, and between each abnormality with clinicopathologic parameters. Somatic EGFR mutation that was found in 49/139 (35.3%) lung adenocarcinomas showed a significant association with young age, female gender, and non-smokers. EGFR overexpression was identified in 82 tumors (59.0%) and statistical relationships with EGFR or BRCA1 methylation but not EGFR mutation. In addition, EGFR, BRCA1, MGMT, MLH1, and RASSF1A methylations were found in 33 (23.7%), 41 (29.5%), 46 (33.1%), 28 (20.1%), and 41 (29.5%) cases of a total of 139 lung adenocarcinomas, respectively. The RASSF1A methylation was found to be linked to the smoking habit. Methylations in MGMT and RASSF1A were also found to correlate with metastasis status. Furthermore, the distribution of EGFR mutation and that of BRCA1, MGMT or RASSF1A methylation were significantly exclusive in lung adenocarcinomas. The main finding of our study demonstrate that epigenetic abnormalities might play a critical role for the lung tumorigenesis in patients with smoking history and metastasis, and partly affect the predictive value of EGFR mutations through blocking expression due to promoter EGFR hypermethylation. Mutually exclusive distribution of genetic and epigenetic alterations reflects differently biological characteristics in the etiology of lung adenocarcinomas.     

结直肠癌血清P53抗体和组织P53蛋白的临床意义

目的 :检测结直肠癌患者血清p5 3抗体 (p5 3Ab)的敏感性和特异性 ,并了解其与肿瘤组织p5 3的相关性和临床意义。方法 :检测 2 0 0 2年 7月至 2 0 0 3年 12月的结直肠癌病例 178例。对照组为 4 0例正常健康志愿者。血清p5 3Ab检验采用酶联免疫法 :肿瘤组织p5 3蛋白表达测定应用免疫组化SP染色法。结果 :178例结直肠癌中33例血清p5 3Ab阳性 ,阳性率 18.5 4 % ;4 0例对照组检测阴性 ,特异性 10 0 %。血清p5 3Ab与患者的年龄、性别和肿瘤发生的部位无关 (P >0 .0 5 ) ;血清p5 3Ab阳性为Dukes’分期B期 (16 / 71,2 2 .5 4 % )、C期 (12 / 5 5 ,2 1.82 % )和D期(5 / 30 ,16 .6 2 % )。 10 3例肿瘤组织p5 3蛋白阳性 (5 7.87% ) ,75例阴性 (4 2 .13% ) ;血清p5 3Ab阳性者 6 9.7%组织表达阳性 ,30 .3%组织表达阴性 (P <0 .0 5 )。随访 6～ 2 4个月 ,肿瘤复发率在血清p5 3Ab阳性和阴性患者间无显著性差异 ;平均存活时间亦无统计学意义。结论 :研究表明血清p5 3Ab的产生伴有肿瘤组织p5 3蛋白的积聚 ;因为抗体检测的低敏感性 ,血清p5 3Ab不能作为术前的肿瘤指标 ;但由于它的高特异性 ,对今后的随访可能具有一定临床意义     

Genomic Analysis Reveals Distinct Subtypes in Two Rare Cases of Primary Ovarian Lymphoma

Primary (localized) non-Hodgkin lymphoma (NHL) of the ovary is extremely rare; only a few cases have been reported in the literature. We report two cases of primary ovarian lymphoma (POL), one involving bilateral ovaries in a 15-year-old girl and other involving one ovary in a 5-year-old girl. This report describes detailed clinical, histopathological, and imaging findings, along with the review of literature of primary diffuse large B-cell lymphoma (DLBCL) arising from an ovary. In addition, we describe findings of targeted capture panel sequencing on both tumors and identify the major genetic mutations that are recurrently mutated in pan-cancers. Compared to the genomic mutation features of major subtypes of DLBCL, we distinguish that each POL belongs to distinctive subtypes, GCB (germinal center B-cell subtype) DLBCL and ABC (activated B-cell subtype) DLBCL, respectively. The findings from the genomic analysis may help to understand the pathogenesis of POL and to guide potential targeted therapy in the future.     

β-catenin与wisp-1在结肠癌中的表达及意义

目的：探讨β-catenin与wisp-1 在原发性结肠癌中表达及临床意义。方法：分别用免疫组化Envision法和实时荧光定量PCR法检测β-catenin、wisp-1 蛋白和基因在53例结肠癌及53例配对正常结肠中的表达。分析两因子表达与临床病理的关系。结果：β-catenin、wisp-1蛋白在结肠癌的异常表达率均高于正常结肠中异常表达率（P〈0.05）。结肠癌中β-catenin蛋白异常表达与淋巴结转移、Duke分期和部位有关（P〈0.05）。wisp-1蛋白异常表达与淋巴结转移、Duke分期有关。β-catenin基因在结肠癌中平均表达是其在正常结肠中的3.237倍（P〈0.05），其异常表达与肿瘤部位及淋巴结转移有关（P〈0.05）。wisp-1基因在结肠癌中平均表达是其在正常结肠中的2.908倍（P〈0.05），其异常表达与肿瘤类型有关（P〈0.05）。结论：β-catenin与wisp-1异常表达特点提示两者与结肠癌的发生发展有密切关系。     

Clinicopathological significance of PTEN and bcl2 expressions in oral squamous cell carcinoma

A high frequency of mutations at the PTEN locus has been noticed in carcinoma of oral. However, the role of PTEN alternations and its association with outcome variables in the genesis of oral carcinoma is not understood fully. The purpose of our study was to examine the impact of PTEN and Bcl2 in the genesis of Squamous cell carcinoma of oral. Total numbers of 60 histopathologically confirmed cases of Squamous Cell Carcinoma and 15 cases of inflammatory lesion of oral specimens were studied. We assessed PTEN and bcl2 overexpression by the use of anti-PTEN and anti-bcl2 antibody through immunohistochemistry as directed by the manufacturer. There was progressive loss of PTEN expression from inflammatory lesion to OSCC (p<0.05). Significant differences were found for PTEN expression between inflammatory lesion and OSCC. The difference in expression pattern of PTEN in gender did not reach statistical significance (p>0.05). The expression of bcl2 was found to be restricted to tumor cells in well and moderately differentiated tumors. The intense expression of bcl2 was observed throughout the tumor cell in poorly differentiated tumors.The Overexpression of bcl2 and loss of PTEN expression were correlated to poor differentiation, lymph node involvement and late stages. Thus, alteration of PTEN and bcl2 is likely an important molecular event in pathogenesis and carcinogenesis of oral carcinoma.     

Expression of PDZ-binding kinase/T-LAK cell-originated protein kinase (PBK/TOPK) in human urinary bladder transitional cell carcinoma

The objective of this study was to evaluate the expression pattern of PDZ-binding kinase/T-LAK cell-originated protein kinase (PBK/TOPK) and its clinical significance in human bladder cancer (BC).     

The development and validation of methods for evaluating the immune system in preweaning piglets

The preweaning piglet has been found to be a valuable research model for testing ingredients used in infant formula. As part of the safety assessment, the neonates' immune system is an important component that has to be evaluated. In this study three concurrent strategies were developed to assess immune system status. The methods included (1) immunophenotying to assess circulating innate immune cell populations, (2) monitoring of circulating cytokines, particularly in response to a positive control agent, and (3) monitoring of localized gastrointestinal tissue cytokines using immunohistochemistry (IHC), particularly in response to a positive control agent. All assays were validated using white papers and regulatory guidance within a GLP environment. To validate the assays precision, accuracy and sample stability were evaluated as needed using a fit for purpose approach. In addition animals were treated with proinflammtory substances to detect a positive versus negative signal. In conclusion, these three methods were confirmed to be robust assays to evaluate the immune system and GIT-specific immune responses of preweaning piglets.