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MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis

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机构: [1]Chinese Acad Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing 100190, Peoples R China; [2]Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China; [3]Capital Med Univ, Key Lab Remodeling Related Cardiovasc Dis, Beijing Inst Heart Lung & Blood Vessel Dis, Beijing Anzhen Hosp,Minist Educ, Beijing 100029, Peoples R China; [4]Beijing Ctr Mass Spectrometry, Beijing 100190, Peoples R China
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Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) is a label-free technique for identifying multiplex metabolites and determining both their distribution and relative abundance in situ. Our previous study showed that N-(1-naphthyl) ethylenediamine dihydrochloride (NEDC) could act as a matrix for laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF MS) detection of oligosaccharides in solution. In the present study, NEDC-assisted LDI-TOF MSI yielded many more endogenous compound peaks between m/z 60 and m/z 1600 than 9-aminoacridine (9-AA). Our results show that NEDC-assisted LDI-TOF MSI is especially well-suited for examining distributions of glycerophospholipids (GPs) in addition to low molecular weight metabolites below m/z 400. Particularly, NEDC matrix allowed the LDI-TOF MSI of glucose in animal tissue. Furthermore, NEDC-assisted LDI-TOF MSI was applied to a mouse model of colorectal cancer liver metastasis. We revealed the distinct spatio-molecular signatures of many detected compounds in tumor or tumor-bearing liver, and we found that taurine, glucose, and some GPs decreased in tumor-bearing liver as the tumor developed in liver. Importantly, we also found a glucose gradient in metastatic tumor foci for the first time, which further confirms the energy competition between tumors and liver remnant due to the Warburg effect. Our results suggest that NEDC-assisted LDI MSI provides an in situ label-free analysis of multiple glycerophospholipids and low molecular weight metabolites (including glucose) with abundant peaks and high spatial resolution. This will allow future application to in situ definition of biomarkers, signaling pathways, and disease mechanisms.

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出版当年[2014]版:
大类 | 2 区 化学
小类 | 1 区 分析化学
最新[2023]版:
大类 | 1 区 化学
小类 | 1 区 分析化学
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出版当年[2013]版:
Q1 CHEMISTRY, ANALYTICAL
最新[2023]版:
Q1 CHEMISTRY, ANALYTICAL

影响因子: 最新[2023版] 最新五年平均 出版当年[2013版] 出版当年五年平均 出版前一年[2012版] 出版后一年[2014版]

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第一作者机构: [1]Chinese Acad Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing 100190, Peoples R China; [2]Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China;
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通讯机构: [1]Chinese Acad Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing 100190, Peoples R China; [2]Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China; [4]Beijing Ctr Mass Spectrometry, Beijing 100190, Peoples R China
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