Correlative Imaging of Trace Elements and Intact Molecular Species in a Single-Tissue Sample at the 50 μm Scale

Janella Marie de Jesus, Catia Costa, Amy Burton, Vladimir Palitsin, Roger Webb, Adam Taylor, Chelsea Nikula, Alex Dexter, Firat Kaya, Mark Chambers, Veronique Dartois, Richard J.A. Goodwin, Josephine Bunch, Melanie J. Bailey

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Elemental and molecular imaging play a crucial role in understanding disease pathogenesis. To accurately correlate elemental and molecular markers, it is desirable to perform sequential elemental and molecular imaging on a single-tissue section. However, very little is known about the impact of performing these measurements in sequence. In this work, we highlight some of the challenges and successes associated with performing elemental mapping in sequence with mass spectrometry imaging. Specifically, the feasibility of molecular mapping using the mass spectrometry imaging (MSI) techniques matrix-assisted laser desorption ionization (MALDI) and desorption electrospray ionization (DESI) in sequence with the elemental mapping technique particle-induced X-ray emission (PIXE) is explored. Challenges for integration include substrate compatibility, as well as delocalization and spectral changes. We demonstrate that while sequential imaging comes with some compromises, sequential DESI-PIXE imaging is sufficient to correlate sulfur, iron, and lipid markers in a single tissue section at the 50 μm scale.

Original languageEnglish (US)
Pages (from-to)13450-13458
Number of pages9
JournalAnalytical Chemistry
Volume93
Issue number40
DOIs
StatePublished - Oct 12 2021

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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