Spray-Based Application of Matrix to Agar-Based Microbial Samples for Reproducible Sample Adherence in MALDI MSI.

Spray-Based Application of Matrix to Agar-Based Microbial Samples for Reproducible Sample Adherence in MALDI MSI.
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DOI:
10.1021/jasms.1c00208
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发表时间:
2022-04-06
影响因子:
3.2
通讯作者:
Phelan, Vanessa V.
Phelan, Vanessa V.
中科院分区:
化学3区
文献类型:
--
作者:
Jens, Justin N.;Breiner, Daniel J.;Phelan, Vanessa V.

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Microbial mass spectrometry imaging (MSI) is a powerful tool used to generate biological hypotheses about the roles of metabolites in microbial competition based upon their two-dimensional spatial distribution. The most commonly used ionization method for microbial MSI is matrix-assisted laser desorption ionization (MALDI). However, medium components and microbial metabolites influence the adhesion of agar samples to the MALDI target, limiting the applicability of MALDI MSI to microbes grown on specific media. Here, we describe a three-step process using a robotic sprayer for matrix application that improves adherence of agar samples to the MALDI target, enabling the use of different media for microbial growth and MSI analysis of larger sample surface areas.
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