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【免费试用】膜特异性外泌体富集试剂盒

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丁香通营销服务商城
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Last Updated 2025-08-12 18:58

【免费试用】膜特异性外泌体富集试剂盒

 

ExoMESS™三大突破:

效率翻倍:血浆外泌体回收率>50%(传统方法<20%)

超高纯度:杂质去除率95%,WB条带更干净

快人一步:1-2小时极速完成,告别熬夜等离心

 

产品特色与操作流程

膜特异性外泌体富集试剂盒采用独特的分离技术,特异性识别外泌体的膜结构,通过磁珠法富集,快速获得大量完整的外泌体。

 

 

产品组分

 

与其他外泌体富集方法对比

膜特异性外泌体富集试剂盒与传统超速离心法、PEG沉淀法和其他磁珠富集法同步提取血浆外泌体,Western Blot检测结果:

 

图1: CD9、CD81、TSG101为外泌体表达阳性标志物;Calnexin、GM130为外泌体表达阴性标志物。

 

柱状图统计Western Blot 的检测结果,阳性标志物CD9、CD81、TSG101蛋白表达强度表示外泌体的富集量,阴性标志物Calnexin和GM130蛋白表达残留量换算成外泌体的纯度。可以看出,PEG沉淀法外泌体富集量大,但是纯度远低于膜特异性富集;超速离心法富集量及纯度都显著低于膜特异性富集。

 

图2. 柱状图显示膜特异性富集法与超速离心法、PEG沉淀法、其他磁珠法对比,所获得的外泌体富集量和富集纯度。

 

通过样品加标回收实验,计算膜特异性外泌体富集法对血浆外泌体富集的效率,如下图所示:

图3. Western Blot 检测样品加标和外泌体标准品中CD9蛋白表达量。外泌体标准品通过超速离心法制备。样品加标是在血浆样品中掺入特定倍数的外泌体标准品。

 

根据实验结果绘制样品加标曲线,计算样品加标(x=i)与不加标(x=0)时检测到的CD9蛋白表达量,即为样本加标的实际检测数值(yi-y0);根据外泌体标准品曲线,换算(x=i)得到理论加标量(y=z),计算在加入不同倍数外泌体标准品(i)条件下,外泌体的富集效率(n):n=(yi-y0)/z。

图4.根据样品加标曲线和外泌体标准品曲线,换算得到的外泌体富集效率高达50%,平均富集效率为45.73%,远超传统富集方法(<20%)。

 

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