MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis
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.
基金:
National Natural Sciences Foundation of ChinaNational Natural Science Foundation of China [21175139, 21205123, 21305144, 21321003, 21127901]; Chinese Academy of SciencesChinese Academy of Sciences
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;
通讯作者:
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
推荐引用方式(GB/T 7714):
Wang Jianing,Qiu Shulan,Chen Suming,et al.MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis[J].ANALYTICAL CHEMISTRY.2015,87(1):422-430.doi:10.1021/ac504294s.
APA:
Wang, Jianing,Qiu, Shulan,Chen, Suming,Xiong, Caiqiao,Liu, Huihui...&Nie, Zongxiu.(2015).MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis.ANALYTICAL CHEMISTRY,87,(1)
MLA:
Wang, Jianing,et al."MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis".ANALYTICAL CHEMISTRY 87..1(2015):422-430