Three-dimensional molecular reconstruction of rat heart with mass spectrometry imaging

Lara Fornai, Annalisa Angelini, Ivo Klinkert, Frans Giskes, Andras Kiss, Gert Eijkel, Erika A. Amstalden-Van Hove, Leendert A. Klerk, Marny Fedrigo, Giuseppe Pieraccini, Gloriano Moneti, Marialuisa Valente, Gaetano Thiene, Ron M.A. Heeren

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Cardiovascular diseases are the world's number one cause of death, accounting for 17.1 million deaths a year. New high-resolution molecular and structural imaging strategies are needed to understand underlying pathophysiological mechanism. The aim of our study is (1) to provide a molecular basis of the heart animal model through the local identification of biomolecules by mass spectrometry imaging (MSI) (three-dimensional (3D) molecular reconstruction), (2) to perform a cross-species validation of secondary ion mass spectrometry (SIMS)- based cardiovascular molecular imaging, and (3) to demonstrate potential clinical relevance by the application of this innovative methodology to human heart specimens. We investigated a MSI approach using SIMS on the major areas of a rat and mouse heart: the pericardium, the myocardium, the endocardium, valves, and the great vessels. While several structures of the heart can be observed in individual two-dimensional sections analyzed by metal-assisted SIMS imaging, a full view of these structures in the total heart volume can be achieved only through the construction of the 3D heart model. The images of 3D reconstruction of the rat heart show a highly complementary localization between Na+, K+, and two ions at m/z 145 and 667. Principal component analysis of the MSI data clearly identified different morphology of the heart by their distinct correlated molecular signatures. The results reported here represent the first 3D molecular reconstruction of rat heart by SIMS imaging.© Springer-Verlag Berlin Heidelberg 2012.
Original languageEnglish
Pages (from-to)2927-2938
Number of pages12
JournalAnalytical and Bioanalytical Chemistry
Volume404
Issue number10
DOIs
Publication statusPublished - 1 Dec 2012

Keywords

  • 3D molecular reconstruction
  • Heart
  • Imaging
  • Secondary ion mass spectrometry
  • animal
  • article
  • software
  • heart
  • cardiac muscle
  • histology
  • human
  • mass spectrometry
  • methodology
  • molecular imaging
  • mouse
  • principal component analysis
  • rat
  • three dimensional imaging
  • ultrastructure

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