Biochemia Medica:分析前变量对临床相关自由循环microRNAs测量的影响

2020-02-17 MedSci MedSci原创

循环microRNA (miRNAs)正在逐渐成为潜在的生物标志物。但是,由于缺乏分析前和分析标准化,因此它们的使用也受到了一定的限制。本研究的目的是根据不同的收集和储存条件,确定不同miRNA在血浆中的表达。

循环microRNA (miRNAs)正在逐渐成为潜在的生物标志物。但是,由于缺乏分析前和分析标准化,因此它们的使用也受到了一定的限制。本研究的目的是根据不同的收集和储存条件,确定不同miRNA在血浆中的表达。

10名志愿者的静脉血收集在喷涂了乙二胺四乙酸二钾盐的试管中,通过使用(等离子体制备管,PPT)或不使用(K2EDTA)凝胶分离器。还从K2EDTA血浆中获得了血小板血浆(PPP)。 在不同条件下储存后,从血浆中分离出富含miRNA的总RNA,然后反转录。 通过定量聚合酶链反应测定一组179miRNA,并通过GenEx软件分析结果,并确定了miRNA的可检测性和稳定性。。

PPT未检测到的mirna数量为182422K2EDTA中的为834320;而在PPP样品中立即冷冻- 80°C的血浆和室温或4°C储存24小时的血浆分别为76106104PPT样品中循环miRNA表达不受储存延迟或温度的影响,而K2EDTAPPP样品中上调和下调miRNA的百分比分别为2%1%7%5%

样品基质、贮存温度和贮存时间对血浆miRNA的表达水平有重要影响。结果表明,PPT管是改善总miRNA可检测性和稳定性的最合适的基质,且与温度无关。

原始出处:

Martina FaraldiVeronica SansoniStudy of the preanalytical variables affecting the measurement of clinically relevant free-circulating microRNAs: focus on sample matrix, platelet depletion, and storage conditions

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    2020-07-07 sunylz
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    2020-03-18 xjy02
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    2020-07-12 jeanqiuqiu
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    2020-08-29 dzx0922889
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    2020-02-19 zhouqu_8
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