The RNA m6A methyltransferase METTL3 promotes pancreatic cancer cell proliferation and invasion

Epigenetic modifications are involved in carcinogenesis and METTL3 is involved in RNA methylation. This study aimed to explore the role of the RNA m6A methyltransferase METTL3 in pancreatic cancer cells. The m6A modification was analyzed in human pancreatic cancer and paracancerous specimens, as well as in the normal HPDE6-C7 pancreatic cell line and the MIA-PaCa-2 and BxPC-3 pancreatic cancer cell lines. Immunohistochemistry (IHC), western blotting, and RT-qPCR were used to detect the expression of METTL3. Cell lines were transfected with siRNAs against METLL3. Proliferation, invasion, and migration were examined. The functions of METTL3 were predicted by bioinformatics analysis. In the 40 patients included, high METTL3 expression was associated with high pathological stage (P = 0.02) and high N stage (P = 0.02). Survival was better in patients with low METTL3 expression compared with those with high MTTL3 expression (P < 0.01). METTL3 and CIITA expression levels were inversely correlated (r = ?0.71, P < 0.01). RNA m6A content in tumor specimens was significantly higher than that in paracancerous specimens. METTL3 protein and mRNA levels were significantly higher in tumor specimens compared with paracancerous specimens, as well as in cancerous cell lines vs. normal cells. METTL3 knockdown in MIA PaCa-2 and BxPC-3 cells decreased RNA m6A modifications. Cell proliferation, invasion, and migration were decreased by METTL3 knockdown in cancerous cell lines. A total of 673 differentially expressed genes were identified by bioinformatics: 659 were upregulated and 14 were downregulated. In conclusion, METTL3 is probably involved in pancreatic carcinogenesis. It could eventually be a prognostic marker or a treatment target.     

设置病区助理对住院患者量及满意度的影响

目的探讨设置病区助理与住院患者满意度及住院患者量的关系。方法通过对设置病区助理前后住院患者满意度及住院患者量的调查,分析设置病区助理对住院患者量及满意度的影响。结果设置病区助理后,病区住院患者满意度逐年提升,差异具有统计学意义（P〈0．01）,住院患者量及重复住院率均呈逐年上升趋势,差异具有统计学意义（P〈0．01）。患者满意度与重复住院率呈正相关（r=0．998,P〈0．05）。结论设置病区助理有助于提升住院患者满意度,促进住院患者量增长。     

血浆中miR-31水平与乳腺癌关系的研究

目的:探讨血浆中miR-31表达水平与乳腺癌临床病理特征之间的关系。方法:收集2010年12月至2011年3月期间我科符合入选条件的31例女性患者(21例乳腺癌患者,10例非乳腺癌患者)的血液标本,分离血浆并提取其中的miR-31,通过实时荧光定量PCR的方法检测血浆中miR-31表达水平,分析其与乳腺癌临床病理特征间的关系。结果:乳腺癌患者血浆中miR-31的表达水平低于非乳腺癌患者,但差异无统计学意义(P>0.05);淋巴结转移阳性的乳腺癌患者血浆中miR-31的表达水平高于淋巴结转移阴性的乳腺癌患者,但差异无统计学意义(P>0.05);Ⅰ和Ⅱ期乳腺癌患者血浆中miR-31的表达水平低于Ⅲ期乳腺癌患者,但差异无统计学意义(P>0.05);直径小于等于2 cm的乳腺癌患者血浆中miR-31表达水平低于大于2 cm的乳腺癌患者,差异有统计学意义(P<0.05);与ER、PR阴性的乳腺癌患者相比,ER、PR阳性的患者血浆中miR-31的表达水平下调,但差异无统计学意义(P>0.05)。结论:血浆中miR-31的表达水平与乳腺癌的肿瘤大小密切相关,血浆中的miR-31有望成为新一代的乳腺癌的肿瘤标志物。     

全血中miR-155与乳腺癌的关系研究

目的探讨全血中miR-155与乳腺癌临床病理特征之间的关系。方法收集2010年12月至2011年4月淮安市第一人民医院甲状腺乳腺外科符合入选条件的65例女性（乳腺癌47例,非乳腺癌18例）的血液标本,提取全血中总RNA,通过荧光实时定量PCR的方法,检测全血中miR-155表达水平,分析其与乳腺癌临床病理特征问的关系。结果乳腺癌患者全血中的miR．155的表达水平与非乳腺癌患者相比上调,差异有统计学意义（P〈0．05）;与淋巴结转移阴性的乳腺癌患者相比,淋巴结转移阳性的乳腺癌患者全血中miR-155的表达水平上调,差异有统计学意义（P〈0．05）;与Ⅰ、Ⅱ期乳腺癌患者相比,Ⅲ期乳腺癌患者全血中miR-155的表达水平上调,差异有统计学意义（P〈0．05）;与T1乳腺癌相比,他和T3乳腺癌患者中miR-155表达上调,差异有统计学意义（P〈0．05）;与ER、PR阴性的乳腺癌相比,ER、PR阳性的患者全血中miR-155表达水平下调,差异有统计学意义（P〈0．05）。结论全血中miR-155的表达水平与乳腺癌的临床病理特征相关,全血中的miRNA有望成为新一代的乳腺癌的肿瘤标志物。