Metabolism group method for distinguishing false positive mass spectra peak signals and quantificationally correcting mass spectra peak area

A technology of mass spectrometry and metabolites, applied in the biological field, can solve problems such as high cost, inappropriate non-targeted metabolomics experiments, and high technical requirements, and achieve reliable data, elimination of false positive mass spectrometry peak signals, and low cost effects

Active Publication Date: 2016-10-12
INST OF BOTANY CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Isotope-labeled metabolomic methods are very effective, but costly and technically demanding
Targeted metabolomic analysis methods, using standard substances, analyze the differences in the content of known metabolites, which can be limited to the analysis of one or some specific metabolites (Phinney, KW. et al.,. Anal Chem 85 :11732-11738), and not suitable for untargeted metabolomics experiments

Method used

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  • Metabolism group method for distinguishing false positive mass spectra peak signals and quantificationally correcting mass spectra peak area
  • Metabolism group method for distinguishing false positive mass spectra peak signals and quantificationally correcting mass spectra peak area
  • Metabolism group method for distinguishing false positive mass spectra peak signals and quantificationally correcting mass spectra peak area

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Embodiment 1

[0078] Example 1. The present invention is used to distinguish false positive mass spectrum peak signals and quantitatively correct the metabolomics method of mass spectrum peak area

[0079] One, the method for eliminating false positive mass spectrum peaks in the detection of metabolites, comprising the steps:

[0080] 1. Prepare QC_mix samples, solvent blank samples, QC_mix samples with different dilution ratios, QC_mix samples with different concentration ratios, and metabolite samples of multiple samples to be tested;

[0081] The QC_mix sample is to mix the metabolite solutions of multiple samples to be tested to obtain a QC_mix sample;

[0082] The metabolite solution is composed of metabolites and organic solvents or obtained by extracting metabolites of the sample to be tested with an organic solvent, and is used as a metabolite sample of the sample to be tested;

[0083] Solvent blank samples consisted of internal standard and organic solvent;

[0084] QC_mix sampl...

Embodiment 2

[0131] Embodiment 2, artificial simulation sample verification method of the present invention reduces the effect of false positive mass spectrum peak

[0132] In order to verify the validity, feasibility and reliability of the method, artificial samples (Artificial Samples, AS) composed of 20 standard products were configured in the experiment. figure 1 It is a flowchart of the present invention.

[0133] Table 1 is the artificial simulation sample and concentration (mmol) that 20 kinds of standard substances are composed

[0134]

[0135]

[0136] *: Asa: artificial samples group A, artificial simulated sample group A, Asa_1,_2,,,_6 simulated 6 biological replicates.

[0137] ^: Asb: artificial samples group B, artificial simulation sample group B, Asb_1,_2,,,_6 simulated 6 biological repeats.

[0138] Concentration unit is mmol

[0139] Standards: Tyrosine (T2900000), Phenylalanine (147966), Kaempferol (96353), 3-Indolebutyric Acid (57310), Taxifolin (78666), 5-Hyd...

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Abstract

The invention discloses a metabolism group method for distinguishing false positive mass spectra peak signals and quantificationally correcting mass spectra peak area. The invention provides a metabolism group study method; by the method, the biological source and non-biological source mass spectra peak signals can be effectively distinguished; the mass spectra peak signals are quantificationally evaluated; the mass spectra peaks with poor quantification performance are excluded; through QC sample dilution, a relative content correction model is built; the mass spectra peak area is corrected. The method has the maximum characteristics that the false positive mass spectra signals can be effectively eliminated, so that the metabolism group data becomes reliable; the real biomarkers can be favorably screened. The method can aim at plant, animal and microbe samples; the method can also be suitable for the mass-spectra-platform-based metabolism group analysis of GC-MS, LC-MS and CE-MS.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a metabolomics method for distinguishing false positive mass spectrum peak signals and quantitatively correcting mass spectrum peak areas. Background technique [0002] With the determination of the whole human genome sequence, various concepts of omics came into being. Genomics research has driven the rapid development of life sciences, and greatly promoted the rapid development of transcriptomics, proteomics, metabolomics, and phenomics. Metabolomics (Metabonomics / Metabolomics) aims to study all small molecule metabolite components and their dynamic changes in organisms or tissues or even single cells (Nicholson JK andLindonJC.Nature 455:1054–6). Metabolites are the closest to the phenotype and are the bridge between the gene and the phenotype. Metabolomics is a very important part of systems biology research. It can not only reveal the function of genes, but also provide scienti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/027
Inventor 漆小泉段礼新
Owner INST OF BOTANY CHINESE ACAD OF SCI
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