Desorption Electrospray Ionization Mass Spectrometry Imaging of Cimbi-36, a 5-HT2A Receptor Agonist, with Direct Comparison to Autoradiography and Positron Emission Tomography

2021 ◽  
Author(s):  
Sophie C. Jacobsen ◽  
Nikolaj R. Speth ◽  
Mengfei Xiong ◽  
Matthias M. Herth ◽  
Jesper L. Kristensen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Positron Emission Tomography ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Receptor Agonist ◽  
Mass Spectrometry Imaging ◽  
Desorption Electrospray Ionization ◽  
Emission Tomography ◽  
Ionization Mass ◽  
Positron Emission

Adhesive film applications help to prepare strawberry fruit sections for desorption electrospray ionization-mass spectrometry imaging

2021 ◽  
Author(s):  
Hirofumi Enomoto
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Mass Spectrometry Imaging ◽  
Desorption Electrospray Ionization ◽  
Biological Tissues ◽  
Ionization Mass Spectrometry ◽  
High Water Content ◽  
Ionization Mass ◽  
Adhesive Film

ABSTRACT Desorption electrospray ionization-mass spectrometry imaging (DESI-MSI) is a powerful tool to analyze the distribution of metabolites in biological tissues. Cryosectioning of biological tissues is usually required prior to DESI-MSI, but it can be difficult for tissues that are fragile, hard, and have a high-water content. The Kawamoto method uses transparent adhesive films to prepare cryosections; however, its application for plant tissues, such as strawberry tissues, in DESI-MSI has not been verified. In this study, strawberry cryosections maintained original structures were prepared using adhesive film. Subsequently, numerous peaks were detected for the sections using the positive and negative ion modes of DESI-MSI. Several primary and specialized metabolites, such as amino acids, sugars, organic acids, and flavonoids, were identified and visualized. These results suggest the use of adhesive films when cryosectioning could improve DESI-MSI analysis of the metabolites in strawberry fruits and various tissues of other plant species.

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