人hTERT基因的pCIneo真核表达载体的构建Q78

构建人端粒酶逆转录酶（hTERT）片段的基因的pCIneo真核表达载体。方法：根据hTERTmRNA序列设计引物,人胚肾转化细胞系293总RNA反转录得到的cDNA为模板,PCR扩增后克隆到载体pCIneo上,并进行酶切鉴定及测序。结果-酶切结果表明hTERT基因已经插入pCIneo真核表达载体,测序结果显示,核苷酸序列的同源性为99．89％,氨基酸序列的同源性为100％。结论：成功构建hTERT基因的pCIneo真核表达载体,为其下一步的研究奠定了基础。     

Bcl-2蛋白在结直肠锯齿状病变伴癌变组织中的表达及其临床意义

为探讨Bcl-2蛋白在结直肠锯齿状病变伴癌变组织中的表达及其临床意义,本研究采用免疫组织化学Envision法检测Bcl-2蛋白在75例锯齿状息肉／腺瘤伴癌变组织及10份健康结直肠黏膜组织中的表达情况。结果显示,Bcl-2蛋白在75例锯齿状息肉／腺瘤伴癌变组织中均有表达,阳性细胞定位于细胞质、细胞膜及细胞核;10份正常结直肠黏膜组织中仅在腺窝基底部有少量细胞见Bcl-2阳性表达,其余腺上皮均不表达。在病变的不同区域,低级别上皮内瘤变、高级别上皮内瘤变及癌变区域中,Bcl-2的阳性表达率分别为44．0％、82．7＇％和78．7％,Bcl-2在癌变及高级别上皮内瘤变区域中的阳性表达率明显高于其在低级别上皮内瘤变区域中的表达（P〈0．05）,而Bcl-2在癌变及高级别上皮内瘤变区域中的阳性表达率差异无统计学意义（P〉0．05）。结果表明,Bcl一2蛋白在结直肠锯齿状息肉／腺瘤伴癌变组织中的不同病变阶段有不同程度的表达,Bcl一2蛋白可作为早期诊断结直肠锯齿状息肉／腺瘤伴癌变的重要指标之一。     

携带TPH-2基因小分子干扰RNA表达载体的构建与鉴定

目的 构建携带色氨酸羟化酶(TPH)-2基因的小分子干扰RNA表达载体.方法 设计并合成shRNA TPH-2对应的两条互补的寡核苷酸链,pU6-CMV-GFP质粒经Age Ⅰ和EcoRⅠ双酶切与退火后的寡核苷酸连接,目的 质粒转化感受态细胞,对长出的克隆应用菌落聚合酶链反应(PCR)鉴定,再对PCR鉴定阳性的克隆进行测序和比对分析.结果 经PCR、酶切及测序证实,pU6-CMV-GFP-TPH-2 shRNA表达载体片段大小为332 bp,其中插入的片段序列和位点与预期完全一致.结论 实验成功构建pU6-CMV-GFP-TPH2 shRNA表达载体.     

急性淋巴细胞白血病患者骨髓单个核细胞TAp63基因的表达

背景：据作者查新检索,国内外有关急性白血病患者骨髓单个核细胞TAp63基因表达的报道罕见。 目的：观察急性淋巴细胞白血病患者骨髓单个核细胞TAp63基因的表达及其意义。 方法：50例急性淋巴细胞白血病患者,其中32例急性B淋巴细胞白血病,18例急性T淋巴细胞白血病。同期选择27例非恶性血液病患者作为对照。取肝素抗凝的骨髓液2~4 mL,用Ficoll液分离骨髓单个核细胞,半定量反转录聚合酶链反应法检测TAp63的表达。 结果与结论：50例急性淋巴细胞白血病患者有49例表达TAp63,急性淋巴细胞白血病组明显高于非恶性血液病组(P < 0.05),急性B淋巴细胞白血病表达水平显著高于急性T淋巴细胞白血病(P < 0.05)。动态观察了5例初治急性淋巴细胞白血病化疗后不同阶段TAp63的表达变化,发现初治时TAp63表达,缓解后低表达或不表达,复发后又表达。结果表明TAp63在急性淋巴细胞白血病患者骨髓单个核细胞的表达明显高于非恶性血液病患者,尤其在急性B淋巴细胞白血病患者中高表达。     

Molecular features of non-B, non-C hepatocellular carcinoma: a PCR-array gene expression profiling study

BACKGROUND/AIMS: Hepatocellular carcinoma (HCC) usually develops following chronic liver inflammation caused by hepatitis C or B virus. Through expression profiling in a rare type of HCC, for which the causes are unknown, we sought to find key genes responsible for each step of hepatocarcinogenesis in the absence of viral influence. METHODS: We used 68 non-B, non-C liver tissues (20 HCC, 17 non-tumor, 31 normal liver) for expression profiling with PCR-array carrying 3072 genes known to be expressed in liver tissues. To select the differentially expressed genes, we performed random permutation testing. A weighted voting classification algorithm was used to confirm the reliability of gene selection. We then compared these genes with the results of previous expression profiling studies. RESULTS: A total of 220 differentially expressed genes were selected by random permutation tests. The classification accuracies using these genes were 91.8, 92.0 and 100.0% by a leave-one-out cross-validation, an additional PCR-array dataset and a Stanford DNA microarray dataset, respectively. By comparing our results with previous reports on virus-infected HCC, four genes (ALB, A2M, ECHS1 and IGFBP3) were commonly selected in some studies. CONCLUSIONS: The 220 differentially expressed genes selected by PCR-array are potentially responsible for hepatocarcinogenesis in the absence of viral influence.     

Characterization of grass carp (Ctenopharyngodon idella) IL-17D: Molecular cloning,functional implication and signal transduction

Although the roles of IL-17 family members during inflammation have been extensively studied in mammals, their knowledge in lower vertebrates is limited. In particular, the biological activities of fish IL-17 and their functional roles are largely unknown. In this study, we cloned grass carp IL-17D (gcIL-17D) and found that its putative protein possessed the conserved features of IL-17 family members. Tissue distribution analysis showed that gcIL-17D was preferentially expressed in the mucosal tissues, including skin, gill and intestine. Subsequently, the involvement of gcIL-17D in inflammatory response was demonstrated by examining the expression profiles of gcIL-17D in head kidney and head kidney leukocytes following in vivo bacterial infection and in vitro LPS treatment, respectively. Furthermore, recombinant gcIL-17D (rgcIL-17D) was prepared in grass carp kidney cells and was able to promote the gene expression of some pro-inflammatory cytokines (IL-1β, TNF-α and CXCL-8) in grass carp primary head kidney cells, revealing gcIL-17D can function as a pro-inflammatory cytokine. Moreover, rgcIL-17D appeared to activate NF-κB signaling by modulating the phosphorylation of IκBα and up-regulated CXCL-8 mRNA expression possibly through NF-κB pathway. Our data shed new light on the functional role of teleost IL-17D in inflammatory response.     

克氏综合征基因表达谱分析

目的 对克氏综合征（Klinefelter syndrome）患者进行基因表达谱分析,探讨其基因差异表达与临床表型之间的关系.方法 采用第二代高通量测序方法对7例克氏综合征患者和7例对照男性外周血全基因组mRNA进行深度测序,运用定量RT-PCR方法对30例克氏综合征患者及30例对照男性进行验证.结果 测序结果根据FDR≤0.001和｜ log2 Ratio≥1 ｜的标准,两组比较存在差异表达基因216个,差异具有统计学意义.其中X染色体基因9个,占4％,与X染色体失活相关的XIST差异表达最明显;常染色体基因207个,占96％,其中NR4A3、ZKSCAN4、HBEGF、EREG、AREG、NR4A2、CCR5差异表达明显.NR4A3主要.与2型糖尿病有关,HBEGF主要参与促性腺激素分泌过程.Y染色体不存在显著差异表达基因.结论 克氏综合征患者不仅多余X染色体基因差异表达,还有大量常染色体基因差异表达,这可能是克氏综合征临床表型多样化的原因.