27-Plex Tandem Mass Tag Mass Spectrometry for Profiling Brain Proteome in Alzheimer's Disease.

27-Plex Tandem Mass Tag Mass Spectrometry for Profiling Brain Proteome in Alzheimer's Disease.
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DOI:
10.1021/acs.analchem.0c00655
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发表时间:
2020-05-19
影响因子:
7.4
通讯作者:
Peng J
Peng J
中科院分区:
化学1区
文献类型:
--
作者:
Wang Z;Yu K;Tan H;Wu Z;Cho JH;Han X;Sun H;Beach TG;Peng J

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串联质量标签(TMT)等多重等压质谱标记方法显著提高了定量质谱学的吞吐量。在这里,我们提出了一种27-plex TMT结合二维液相色谱(LC/LC)进行广泛的多肽分离和高分辨率串联质谱仪(MS/MS)进行多肽定量的方法,并将该方法应用于阿尔茨海默病(AD)复杂的人脑蛋白质组的研究。27-plex方法结合了11-plex和16-plex TMT的多重能力,因为这两组TMT标记的多肽显示出不同的质量和疏水性,可以在LC-MS/MS中很好地分离。我们首先系统地优化了新开发的16-plex TMT的操作条件,包括标记反应、脱盐和MS条件,然后通过分析相同的人AD样本直接比较了11-plex和16-plex方法。这两种方法得到了相似的蛋白质组覆盖范围,分析了10,000种人类蛋白质中的10,000种多肽。此外,将11-plex和16-plex样品混合进行27-plex分析,在相同的MS时间内测量了超过8000个蛋白质。27-plex的结果与单独的11-plex和16-plex TMT分析的结果高度一致。我们还使用这些蛋白质组学数据集来比较AD大脑和非痴呆对照组,发现了主要的AD相关蛋白质,并揭示了大量新的蛋白质变化,丰富了淀粉样变、免疫、线粒体和突触功能。总体而言,我们的数据有力地表明,这种新的27-plex策略对于常规的大规模蛋白质组分析是高度可行的。
Multiplexed isobaric labeling methods, such as Tandem Mass Tags (TMT), remarkably improve the throughput of quantitative mass spectrometry. Here we present a 27-plex TMT method coupled with two-dimensional liquid chromatography (LC/LC) for extensive peptide fractionation and high-resolution tandem mass spectrometry (MS/MS) for peptide quantification, and then apply the method to profile complex human brain proteome of Alzheimer’s disease (AD). The 27-plex method combines multiplexed capacities of the 11-plex and the 16-plex TMT, as the peptides labeled by the two TMT sets display different mass and hydrophobicity, which can be well separated in LC-MS/MS. We first systematically optimized the protocol for the newly developed 16-plex TMT, including labeling reaction, desalting, and MS conditions, and then directly compared the 11-plex and 16-plex methods by analyzing the same human AD samples. Both methods yielded similar proteome coverage, analyzing > 100,000 peptides in > 10,000 human proteins. Furthermore, the 11-plex and 16-plex samples were mixed for a 27-plex assay, resulting in more than 8,000 protein measurements within the same MS time. The 27-plex results are highly consistent with those of the individual 11-plex and 16-plex TMT analyses. We also used these proteomics datasets to compare AD brain with the non-dementia controls, discovering major AD-related proteins and revealing numerous novel protein alterations enriched in the pathways of amyloidosis, immunity, mitochondrial and synaptic functions. Overall, our data strongly demonstrate that this new 27-plex strategy is highly feasible for routine large-scale proteomic analysis.
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发表时间: 2012-03-27
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