Peroxiredoxin2基因RNAi慢病毒载体构建及对SW480细胞增殖的影响

目的：构建Peroxiredoxin2（PRDX2）基因RNA干扰（RNAinterference,RNAi）慢病毒表达载体,探讨PRDX2基因干扰后对结直肠癌SW480细胞增殖的影响。方法设计、合成靶向PRDX2的RNA干扰的序列,构建pGC‐EGFP‐shPRDX2慢病毒载体并进行鉴定,同时应用qRT‐PCR和Westernblot方法观察转染的SW480结肠癌细胞PRDX2mRNA和蛋白表达的抑制效果,并通过MTT、平板克隆形成实验检测细胞增殖变化。结果成功构建PRDX2基因慢病毒载体并经测序证实;pGC‐EGFP‐shPRDX2可有效抑制结直肠癌SW480细胞PRDX2的表达,感染慢病毒的SW480细胞中PRDX2mRNA和蛋白表达水平明显降低（P＜0．05）;SW480细胞经PRDX2RNA干扰后其生长和增殖能力显著降低（P＜0．05）。结论PRDX2基因RNAi慢病毒表达载体在SW480细胞中表达稳定可靠,PRDX2基因干扰后有效抑制了结直肠癌SW480细胞的增殖和生长,为进一步探讨PRDX2在结直肠癌发生、发展及转移中的作用奠定基础。     

Effect of Tiantai No.1(天泰1号)on Gene Expression Profiles in Hippocampus of Alzheimer's Disease Rats by Bioinformatic Analysis

Objective:To study the effect of Tiantai No.1(天泰1号) on gene expression profile in hippocampus of Alzheimer's disease(AD) rat,molecular genetic target points of the effect of this drug were defined,its molecular genetic pharmacodynamic mechanism of anti-AD was further explored at molecular gene level,and a scientific basis was provided for its clinical availability and promotion.Methods:Thirty male SpragueDawley rats were divided into three groups with 10 rats per group:sham-operation group,model group and Tiantai No.1 group.Sterile surgical procedure was applied,the model group with bilateral hippocampal injection of Aβ_(1-40) was established,and normal saline was used instead of Aβ_(1-40)in the sham-operation group.One week after the models was made,rats were administered by gastric lavage once every day for three consecutive weeks.The rats of the sham-operation group and the model group were daily fed with purified water by lavage;the rats of the Tiantai No.1 group treated group were administered with Tiantai No.1 by lavage.Total RNAs of hippocampus tissues were extracted with Trizol,the changes of hippocampus gene expression profiles in the above three groups were analyzed by using Affymetrix rat whole genome expression profile microarray.Results:Microarray analysis showed that,compared with the sham-operation group,the hippocampus of the model group had 50 up-regulated genes with significant difference(fold change 2),and 21 down-regulated genes with significant difference(fold change 0.5);compared with the hippocampus of the model group,the hippocampus of the Tiantai No.1 group was found to have 5 up-regulated genes with significant difference(fold change 2) and 20down-regulated genes with significant difference(fold change 0.5).The functions of differentially expressed genes of the groups were involved in nervous system's development,neuronic differentiation and function-regulation,cellular growth and differentiation and apoptosis,synaptic occurrence and plasticity,inflammation and immune response,ion channels/transporters,cellular signal transduction,cellular material/energy metabolism and so on.Conclusion:Tiantai No.1 can regulate hippocampal function,and further regulate the brain function of animals in multiple gene target points by a number of ways.     

骨碎补总黄酮与淫羊藿苷对人骨髓基质干细胞增殖及蛋白表达的影响

目的：观察骨碎补总黄酮与淫羊藿苷对人骨髓基质干细胞增殖及蛋白表达的影响。方法：采用人骨髓基质干细胞单独培养,按照干预药物浓度（mmol·L－1）分为：骨碎补总黄酮10－4 mmol·L－1组、10－6 mmol·L－1组、10－8 mmol·L－1组和淫羊藿苷10－4 mmol·L－1组、10－6 mmol·L－1组、10－8 mmol·L－1组。运用噻唑蓝比色法（MTT法）,分别在实验第1天、第3天、第5天、第7天时观察其增殖情况。同时,运用蛋白免疫印迹方法（in-cell western blot）分别测定人骨髓基质干细胞培养时骨源性碱性磷酸酶蛋白的表达情况。采用一般线性模型的重复测量方差分析比较不同状态下细胞增殖能力和蛋白表达的差异性。结果：药物作用第5天,骨碎补总黄酮10－6 mmol·L－1、10－8 mmol·L－1组和淫羊藿苷10－4 mmol·L－1、10－6 mmol·L－1、10－8 mmol·L－1组增殖能力优于对照组,与对照组比较,差异具有统计学意义（P＜0．05）。在药物作用于人骨髓基质干细胞第9天时,骨碎补总黄酮10－6 mmol·L－1组、淫羊藿苷10－6 mmol·L－1组骨源性碱性磷酸酶的表达量是优于对照组的,但差异无统计学意义（P＞0．05）。结论：骨碎补总黄酮、淫羊藿苷可以促进人骨髓基质干细胞的增殖,10－6 mmol·L－1的骨碎补总黄酮、淫羊藿苷对BALP表达无显著影响。     

eIF-4E基因在非小细胞肺癌中的表达及与化疗敏感性的关系

目的探讨e IF-4E基因在非小细胞肺癌(Non small cell lung cancer,NSCLC)表达及与化疗敏感性的关系。方法选用外科手术切除NSCLC组织60例以及癌旁正常组织30例作为对照,通过免疫组化检测癌组织以及正常肺组织中el F-4E的表达。NSCLC患者术后接受榄香烯顺铂治疗至少两周以上。比较el F-4E在癌组织以及正常肺组织中的表达、e IF-4E阴性表达患者和阳性表达患者的总生存期和化疗效果。结果 e IF-4E在NSCLC患者癌组织中的阳性表达率显著高于癌旁组织(P<0.01);e IF-4E阴性表达患者的OS较阳性患者明显延长,阳性表达患者的化疗完全缓解率亦显著低于e IF-4E阴性表达患者(P<0.01)。结论 e IF-4E可能成为NSCLC诊断的标志物,e IF-4E表达水平检测可用于NSCLC患者个体治疗方案的选择。     

Increased PUFA Content and 5-Lipoxygenase Pathway Expression Are Associated with Subcutaneous Adipose Tissue Inflammation in Obese Women with Type 2 Diabetes

Obese women with type 2 diabetes mellitus (T2DM) have more inflammation in their subcutaneous white adipose tissue (sWAT) than age-and-BMI similar obese women with normal glucose tolerance (NGT). We aimed to investigate whether WAT fatty acids and/or oxylipins are associated with the enhanced inflammatory state in WAT of the T2DM women. Fatty acid profiles were measured in both subcutaneous and visceral adipose tissue (vWAT) of 19 obese women with NGT and 16 age-and-BMI similar women with T2DM. Oxylipin levels were measured in sWAT of all women. Arachidonic acid (AA) and docosahexaenoic acid (DHA) percentages were higher in sWAT, but not vWAT of the T2DM women, and AA correlated positively to the gene expression of macrophage marker CD68. We found tendencies for higher oxylipin concentrations of the 5-LOX leukotrienes in sWAT of T2DM women. Gene expression of the 5-LOX leukotriene biosynthesis pathway was significantly higher in sWAT of T2DM women. In conclusion, AA and DHA content were higher in sWAT of T2DM women and AA correlated to the increased inflammatory state in sWAT. Increased AA content was accompanied by an upregulation of the 5-LOX pathway and seems to have led to an increase in the conversion of AA into proinflammatory leukotrienes in sWAT.     

吗啡急性处理小鼠的微阵列数据分析和生物标记识别

目的通过生物信息学方法,识别吗啡急性处理小鼠的差异表达基因及其富集的通路。方法从高通量基因表达数据库(Gene Expression Omnibus)下载吗啡急性处理小鼠的微阵列数据,并调用R语言3.1.0软件的质量控制包Affy QCReport 1.42.0对数据样本进行质量控制分析,运用R语言的微阵列数据线性模型识别吗啡处理前后的差异表达基因,采用表达分析系统检测算法进行差异表达基因的通路富集分析。结果吗啡急性处理小鼠的微阵列基因表达数据具有良好的均一性和阵列强度相似性,识别得到Gm11627、Zfand4、Zbtb16、Pkp2和Plin4等481个差异表达基因和癌症、黑素原生成和丝裂原活化蛋白激酶信号等8条代谢通路。结论所识别的差异表达基因和代谢通路成为吗啡急性处理小鼠潜在的生物标记。