Artifactual FA dimers mimic FAHFA signals in untargeted metabolomics pipelines.

Artifactual FA dimers mimic FAHFA signals in untargeted metabolomics pipelines.
复制标题

DOI:
10.1016/j.jlr.2022.100201
复制
发表时间:
2022-05
影响因子:
6.5
通讯作者:
Puchalska P
Puchalska P
中科院分区:
生物学2区
文献类型:
--
作者:
Nelson AB;Chow LS;Hughey CC;Crawford PA;Puchalska P

文献摘要

参考文献

相似文献

羟基 FA 的 FA 酯 (FAHFA) 是具有广泛结构和区域异构体多样性的脂质因子,可影响多种生理功能,包括胰岛素敏感性和葡萄糖稳态。由于 FAHFA 的摩尔丰度较低,通常使用高灵敏度的 LC-MS/MS 方法对其进行定量。许多相关的 MS 数据库都包含在计算机光谱中,可以对 FAHFA 进行识别和形态分析。这些临时化学特征分配提供了有用的起点,但可能导致错误识别。为了解决这种可能性,我们使用常用的高分辨率 LC-MS 非靶向代谢组学平台分析了人血清。我们发现,根据与光谱数据库匹配的精确质量和碎片模式,许多化学特征被推定为 FAHFA 脂质类别。使用真实标准进行的仔细验证表明,许多被临时指定为 FAHFA 的研究信号实际上是 LC-MS 管道中形成的 FA 二聚体。这些同量 FA 二聚体的结构差异仅在于是否存在烯键。此外,稳定同位素标记的油酸以亚生理浓度掺入人血清中,显示出多种 FA 二聚体的浓度依赖性形成,这些二聚体在分析上模拟了 FAHFA。相反,经验证的 FAHFA 物种不会在 LC-MS 管道中自发形成。总之,这些发现强调了 FAHFA 是内源性脂质种类。  然而,在高浓度 FFA 环境中形成的非生物 FA 二聚体可能会被误认为是 FAHFA。基于这些结果,我们构建了 FA 二聚体数据库,以识别非靶向代谢组学数据集中的非生物 FA 二聚体。
FA esters of hydroxy FAs (FAHFAs) are lipokines with extensive structural and regional isomeric diversity that impact multiple physiological functions, including insulin sensitivity and glucose homeostasis. Because of their low molar abundance, FAHFAs are typically quantified using highly sensitive LC-MS/MS methods. Numerous relevant MS databases house in silico-spectra that allow identification and speciation of FAHFAs. These provisional chemical feature assignments provide a useful starting point but could lead to misidentification. To address this possibility, we analyzed human serum with a commonly applied high-resolution LC-MS untargeted metabolomics platform. We found that many chemical features are putatively assigned to the FAHFA lipid class based on exact mass and fragmentation patterns matching spectral databases. Careful validation using authentic standards revealed that many investigated signals provisionally assigned as FAHFAs are in fact FA dimers formed in the LC-MS pipeline. These isobaric FA dimers differ structurally only by the presence of an olefinic bond. Furthermore, stable isotope-labeled oleic acid spiked into human serum at subphysiological concentrations showed concentration-dependent formation of a diverse repertoire of FA dimers that analytically mimicked FAHFAs. Conversely, validated FAHFA species did not form spontaneously in the LC-MS pipeline. Together, these findings underscore that FAHFAs are endogenous lipid species.  However, nonbiological FA dimers forming in the setting of high concentrations of FFAs can be misidentified as FAHFAs. Based on these results, we assembled a FA dimer database to identify nonbiological FA dimers in untargeted metabolomics datasets.
爱马仕:一种针对代谢组的分子形成方法。
DOI: 10.1038/s41592-021-01307-z
发表时间: 2021-11
期刊: NATURE METHODS
影响因子: 48
作者:
Gine, Roger;CapeHades, Jordi;Badia, Josep M.;Vughs, Dennis;Schwaiger-Haber, Michaela;Alexandrov, Theodore;Vinaixa, Maria;Brunner, Andrea M.;Patti, Gary J.;Yanes, Oscar
通讯作者: Yanes, Oscar
DOI: 10.1007/978-1-0716-0239-3_9
发表时间: 2020
期刊: Methods in molecular biology (Clifton, N.J.)
影响因子: --
作者:
Montenegro-Burke, J Rafael;Guijas, Carlos;Siuzdak, Gary
通讯作者: Siuzdak, Gary
DOI: 10.1021/acs.analchem.7b02380
发表时间: 2017-10-03
影响因子: 7.4
作者:
Mahieu NG;Patti GJ
通讯作者: Patti GJ
DOI: 10.1021/acs.analchem.9b00217
发表时间: 2019-05-07
影响因子: 7.4
作者:
Fu, Xiaorong;Deja, Stanislaw;Burgess, Shawn C.
通讯作者: Burgess, Shawn C.
DOI: 10.1021/acs.analchem.8b00503
发表时间: 2018-04-17
影响因子: 7.4
作者:
Kolar MJ;Nelson AT;Chang T;Ertunc ME;Christy MP;Ohlsson L;Härröd M;Kahn BB;Siegel D;Saghatelian A
通讯作者: Saghatelian A