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Holistic Characterization of a Salmonella Typhimurium Infection Model Using Integrated Molecular Imaging.

Accepted version
Peer-reviewed

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Authors

Strittmatter, Nicole  ORCID logo  https://orcid.org/0000-0003-1277-9608
Kanvatirth, Panchali 
Nilsson, Anna 

Abstract

A more complete and holistic view on host-microbe interactions is needed to understand the physiological and cellular barriers that affect the efficacy of drug treatments and allow the discovery and development of new therapeutics. Here, we developed a multimodal imaging approach combining histopathology with mass spectrometry imaging (MSI) and same section imaging mass cytometry (IMC) to study the effects of Salmonella Typhimurium infection in the liver of a mouse model using the S. Typhimurium strains SL3261 and SL1344. This approach enables correlation of tissue morphology and specific cell phenotypes with molecular images of tissue metabolism. IMC revealed a marked increase in immune cell markers and localization in immune aggregates in infected tissues. A correlative computational method (network analysis) was deployed to find metabolic features associated with infection and revealed metabolic clusters of acetyl carnitines, as well as phosphatidylcholine and phosphatidylethanolamine plasmalogen species, which could be associated with pro-inflammatory immune cell types. By developing an IMC marker for the detection of Salmonella LPS, we were further able to identify and characterize those cell types which contained S. Typhimurium.

Description

Keywords

Salmonella infection, imaging mass cytometry, mass spectrometry imaging, multimodal data integration, network analysis, Animals, Female, Mass Spectrometry, Mice, Mice, Inbred C57BL, Molecular Imaging, Salmonella Infections, Salmonella typhimurium

Journal Title

J Am Soc Mass Spectrom

Conference Name

Journal ISSN

1044-0305
1879-1123

Volume Title

Publisher

American Chemical Society (ACS)
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/M000982/1)
Swedish Research Council,, the Swedish Foundation for Strategic Research and the Science for Life Laboratory