Abstract

(Matrix-assisted) laser desorption/ionization ((MA)LDI) mass spectrometry imaging (MSI) has been driven by remarkable technological developments in the last couple of years. Although molecular information of a wide range of molecules including peptides, lipids, metabolites, and xenobiotics can be mapped, (MA)LDI MSI only leads to the detection of the most abundant soluble molecules in the cells and, consequently, does not provide access to the least expressed species, which can be very informative in the scope of disease research. Within a short period of time, numerous protocols and concepts have been developed and introduced in order to increase MSI sensitivity, including in situ tissue chemistry and solvent-free matrix depositions. In this chapter, we will discuss some of the latest developments in the field of high-sensitivity MSI using solvent-free matrix depositions and will detail protocols of two methods with their capability of enriching molecular MSI signal as demonstrated within our laboratory.

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Correspondence to Pierre Chaurand .

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Thomas, A., Patterson, N.H., Dufresne, M., Chaurand, P. (2016). (MA)LDI MS Imaging at High Specificity and Sensitivity. In: Cramer, R. (eds) Advances in MALDI and Laser-Induced Soft Ionization Mass Spectrometry. Springer, Cham. https://doi.org/10.1007/978-3-319-04819-2_7

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