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基于生物信息学分析mi R-125b-5p在肺腺癌中的表达及预后价值 被引量:1
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作者 郭娜 徐颖 +4 位作者 李祥伶 王鹏 李琳 许倩 刘镭 《承德医学院学报》 2022年第5期365-370,共6页
目的应用生物信息学方法分析mi R-125b-5p在肺腺癌(LUAD)中的表达,预测其靶基因及预后价值。方法选取GEO数据库中LUAD顺铂耐药组织和细胞芯片,应用R软件筛选差异表达miRNA。应用miRBase数据库进行保守性分析,并采用db DEMC3.0数据库进... 目的应用生物信息学方法分析mi R-125b-5p在肺腺癌(LUAD)中的表达,预测其靶基因及预后价值。方法选取GEO数据库中LUAD顺铂耐药组织和细胞芯片,应用R软件筛选差异表达miRNA。应用miRBase数据库进行保守性分析,并采用db DEMC3.0数据库进行表达水平分析。利用Target Scan、mi RDB、mi RTar Base数据库预测靶基因,并运用DAVID在线网站对靶基因进行功能富集分析。联合TCGA数据库LUAD患者生存信息,进行预后分析。实时荧光定量PCR技术检测mi R-125b-5p在人正常支气管上皮细胞系16HBE、LUAD细胞系A549以及顺铂耐药细胞系A549/DDP中的表达水平。结果分析芯片数据获得LUAD顺铂耐药相关miR-125b-5p,其具有高度保守性,并在LUAD中显著下调。预测到的54个靶基因主要富集在调节基因表达、细胞大分子生物合成等过程,以及Micro RNAs in cancer、Protein processing in endoplasmic reticulum、HIF-1 signaling pathway等通路。Kaplan-Meier生存分析结果提示,mi R-125b-5p低表达与肺腺癌患者预后不良相关。q RT-PCR结果显示,mi R-125b-5p在A549细胞中表达水平显著低于16HBE(P=0.008);与亲本细胞相比,在耐药细胞A549/DDP中表达水平明显下降(P=0.023)。结论miR-125b-5p在肺腺癌中表达异常,且其靶基因参与调控多个生物学过程及信号通路,可能是肺腺癌预后的生物标志物。 展开更多
关键词 生物信息学 肺腺癌 顺铂耐药 mi r-125b-5p 预后
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Circulating miR-125a but not miR-125b is decreased in active disease status and negatively correlates with disease severity as well as inflammatory cytokines in patients with Crohn's disease 被引量:12
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作者 Chen-Ming Sun Jie Wu +2 位作者 Heng Zhang Gan Shi Zhi-Tao Chen 《World Journal of Gastroenterology》 SCIE CAS 2017年第44期7888-7898,共11页
AIM To determine the association of circulating mi R-125 a/b expression with the risk and disease severity of Crohn's disease(CD), and with inflammatory cytokines.METHODS Plasma samples were collected from patient... AIM To determine the association of circulating mi R-125 a/b expression with the risk and disease severity of Crohn's disease(CD), and with inflammatory cytokines.METHODS Plasma samples were collected from patients with active CD(A-CD), or CD in remission(R-CD) and from healthy controls(HCs). The levels of the inflammatory cytokines interleukin-17(IL-17), tumour necrosis factor-α(TNF-α), and interferon-γ(IFN-γ) were measured by enzyme-linked immunosorbent assay. The expression of mi R-125 a/b was assessed by quantitative polymerase chain reaction(q PCR).RESULTS Twenty-nine A-CD patients, 37 R-CD patients, and 37 HCs were included in the study. Plasma mi R-125 a expression was decreased in A-CD patients comparedwith that in R-CD patients(P < 0.001) and HCs(P < 0.001). mi R-125 a expression levels enabled the differentiation of A-CD from R-CD patients [area under curve(AUC) = 0.854] and from HCs(AUC = 0.780), whereas mi R-125 b expression did not. mi R-125 a was negatively correlated with C-reaction protein(CRP)(P = 0.017), erythrocyte sedimentation rate(ESR)(P = 0.026), Crohn's disease activity index(CDAI)(P = 0.003), IL-17(P = 0.015), and TNF-α(P = 0.004) in A-CD patients. Furthermore, mi R-125 a was negatively associated with CRP(P = 0.038) and CDAI(P = 0.021) in R-CD patients. Regarding mi R-125 b, no association with CRP, CDAI, IL-17, TNF-α, or IFN-γ was found in A-CD or in R-CD patients. mi R-125 a levels gradually increased in A-CD patients who achieved clinical remission(P = 0.009) after 3-mo treatment, whereas they remained unchanged among patients who failed to achieve remission. No changes in mi R-125 b expression were detected in remission or non-remission patients after treatment. CONCLUSION Circulating mi R-125 a but not mi R-125 b is decreased in patients with active disease status and negatively correlates with disease severity and inflammatory cytokines in patients with CD. 展开更多
关键词 Crohn's disease mi r-125 Disease risk Disease severity Inflammatory cytokines
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