Nanospray desorption electrospray ionization mass spectrometry of untreated and treated probiotic Lactobacillus reuteri cells.
Nanospray desorption electrospray ionization mass spectrometry of untreated and treated probiotic Lactobacillus reuteri cells.
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DOI:
10.1007/s00216-018-1071-1
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发表时间:
2018-07
影响因子:
4.3
通讯作者:
Chiu NHL
中科院分区:
文献类型:
--
作者:
Uwakweh AO;Mwangi JN;Todd D;Jia Z;Chiu NHL
Mass spectrometry has proven to be a useful technique for rapid identification of bacterial cells. Among various ionization techniques in mass spectrometry, matrix-assisted laser desorption/ionization (MALDI) has been commonly used for the identification of bacterial cells. Recently, MALDI mass spectrometry has also been utilized to distinguish cellular responses. Ambient ionization techniques do support whole bacterial cells analysis, which include desorption electrospray ionization (DESI). Nanospray DESI (nDESI) is a new variant of DESI and its application to whole cell mass spectrometry is limited. In this project, the use of nDESI mass spectrometry to measure probiotic Lactobacillus reuteri (LR) cells is explored. Unique and reproducible mass spectral pattern of untreated LR cells was obtained by using 50% methanol:water as nDESI solvent. The use of nDESI mass spectrometry is further extended to distinguish untreated LR cells from treated LR cells that have been exposed to low pH. These findings demonstrate the feasibility of using nDESI in whole cell mass spectrometry.
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