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Mass Spectrometry Imaging Using the Stretched Sample Approach

  • Tyler A. Zimmerman
  • Stanislav S. Rubakhin
  • Jonathan V. SweedlerEmail author
Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 656)

Abstract

Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry imaging (MSI) can determine tissue localization for a variety of analytes with high sensitivity, chemical specificity, and spatial resolution. MS image quality typically depends on the MALDI matrix application method used, particularly when the matrix solution or powder is applied directly to the tissue surface. Improper matrix application results in spatial redistribution of analytes and reduced MS signal quality. Here we present a stretched sample imaging protocol that removes the dependence of MS image quality on the matrix application process and improves analyte extraction and sample desalting. First, the tissue sample is placed on a monolayer of solid support beads that are embedded in a hydrophobic membrane. Stretching the membrane fragments the tissue into thousands of nearly single-cell sized islands, with the pieces physically isolated from each other by the membrane. This spatial isolation prevents analyte transfer between beads, allowing for longer exposure of the tissue fragments to the MALDI matrix, thereby improving detectability of small analyte quantities without sacrificing spatial resolution. When using this method to reconstruct chemical images, complications result from non-uniform stretching of the supporting membrane. Addressing this concern, several computational tools enable automated data acquisition at individual bead locations and allow reconstruction of ion images corresponding to the original spatial conformation of the tissue section. Using mouse pituitary, we demonstrate the utility of this stretched imaging technique for characterizing peptide distributions in heterogeneous tissues at nearly single-cell resolution.

Key words

Mass spectrometry imaging matrix-assisted laser desorption/ionization nervous tissue pituitary mouse stretched sample image reconstruction automated data acquisition 

Notes

Acknowledgments

We thank Georgina M. Aldridge, University of Illinois at Urbana-Champaign, for providing the animals. The project described was supported by Award No. P30 DA018310 and Award No. 5RO1DA017940 from the National Institute On Drug Abuse and Award No. 5RO1DE018866 from the National Institute of Dental and Craniofacial Research (NIDCR) and the Office of Director (OD), National Institutes of Health (NIH). The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIDA, NIDCR, or NIH.

References

  1. 1.
    Seeley, E. H., Caprioli, R. M. (2008) Molecular imaging of proteins in tissues by mass spectrometry. Proc Natl Acad Sci U S A, 105, 18126–18131.PubMedCrossRefGoogle Scholar
  2. 2.
    McDonnell, L. A., Heeren, R. M. (2007) Imaging mass spectrometry. Mass Spectrom Rev, 26, 606–643.PubMedCrossRefGoogle Scholar
  3. 3.
    Pacholski, M. L., Winograd, N. (1999) Imaging with mass spectrometry. Chem Rev, 99, 2977–3006.PubMedCrossRefGoogle Scholar
  4. 4.
    Rubakhin, S. S., Jurchen, J. C., Monroe, E. B., Sweedler, J. V. (2005) Imaging mass spectrometry: fundamentals and applications to drug discovery. Drug Discov Today, 10, 823–837.PubMedCrossRefGoogle Scholar
  5. 5.
    Becker, J. S. (2007) Inorganic Mass Spectrometry: Principles and Applications, John Wiley & Sons, Hoboken, NJ.Google Scholar
  6. 6.
    Lemaire, R., Menguellet, S. A., Stauber, J., Marchaudon, V., Lucot, J.-P., Collinet, P., Farine, M.-O., Vinatier, D., Day, R., Ducoroy, P., et al. (2007) Specific MALDI imaging and profiling for biomarker hunting and validation: fragment of the 11S proteasome activator complex, reg alpha fragment, is a new potential ovary cancer biomarker. J Proteome Res, 6, 4127–4134.PubMedCrossRefGoogle Scholar
  7. 7.
    Chandra, S., Tjarks, W., Lorey, D. R., Barth, R. F. (2008) Quantitative subcellular imaging of boron compounds in individual mitotic and interphase human glioblastoma cells with imaging secondary ion mass spectrometry (SIMS). J Microsc, 229, 92–103.PubMedCrossRefGoogle Scholar
  8. 8.
    Chaurand, P., Norris, J. L., Cornett, D. S., Mobley, J. A., Caprioli, R. M. (2006) New developments in profiling and imaging of proteins from tissue sections by MALDI mass spectrometry. J Proteome Res, 5, 2889–2900.PubMedCrossRefGoogle Scholar
  9. 9.
    Chaurand, P., Rahman, M. A., Hunt, T., Mobley, J. A., Gu, G., Latham, J. C., Caprioli, R. M., Kasper, S. (2008) Monitoring mouse prostate development by profiling and imaging mass spectrometry. Mol Cell Proteomics, 7, 411–423.PubMedGoogle Scholar
  10. 10.
    Hsieh, Y., Chen, J., Korfmacher, W. A. (2007) Mapping pharmaceuticals in tissues using MALDI imaging mass spectrometry. Pharmacol Toxicol Methods, 55, 193–200.CrossRefGoogle Scholar
  11. 11.
    Rubakhin, S. S., Hatcher, N. G., Monroe, E. B., Heien, M. L, Sweedler, J. V. (2007) Mass spectrometric imaging of the nervous system. Curr Pharm Design, 13, 3325–3334.CrossRefGoogle Scholar
  12. 12.
    Chaurand, P., Norris, J. L., Cornett, D. S., Mobley, J. A., Caprioli, R. M. (2006) New developments in profiling and imaging of proteins from tissue sections by MALDI mass spectrometry. J Proteome Res, 5, 2889–2900.PubMedCrossRefGoogle Scholar
  13. 13.
    Kruse, R., Sweedler, J. V. (2003) Spatial profiling invertebrate ganglia using MALDI MS. Am Soc Mass Spectrom, 14, 752–759.CrossRefGoogle Scholar
  14. 14.
    Aerni, H. R., Cornett, D. S., Caprioli, R. M. (2006) Automated acoustic matrix deposition for MALDI sample preparation. Anal Chem, 78, 827–834.PubMedCrossRefGoogle Scholar
  15. 15.
    Monroe, E. B., Jurchen, J. C., Koszczuk, B. A., Losh, J. L., Rubakhin, S. S., Sweedler, J. V. (2006) Massively parallel sample preparation for the MALDI MS analyses of tissues. Anal Chem, 78, 6826–6832.PubMedCrossRefGoogle Scholar
  16. 16.
    Clerens, S., Ceuppens, R., Arckens, L. (2006) Createtarget and analyze this!: new software assisting imaging mass spectrometry on Bruker Reflex IV and Ultraflex II instruments. Rapid Commun Mass Spectrom, 20, 3061–3066.PubMedCrossRefGoogle Scholar
  17. 17.
    Decker, J. D. (2004) Image editing. Am J Orthod Dentofacial Orthop, 125, 215–219.PubMedCrossRefGoogle Scholar
  18. 18.
    Zimmerman, T. A., Monroe, E. B., Sweedler, J. V. (2008) Adapting the stretched sample method from tissue profiling to imaging. Proteomics, 8, 3809–3815.PubMedCrossRefGoogle Scholar
  19. 19.
    Wang, J., Chen, R., Ma, M., Li, L. (2008) MALDI MS sample preparation by using paraffin wax film: systematic study and application for peptide analysis. Anal Chem, 80, 491–500.PubMedCrossRefGoogle Scholar
  20. 20.
    Monroe, E. B., Koszczuk, B. A., Losh, J. L., Jurchen, J. C., Sweedler, J. V. (2007) Measuring salty samples without adducts with MALDI MS. Int J Mass Spectrom, 260, 237–242.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Tyler A. Zimmerman
    • 1
  • Stanislav S. Rubakhin
    • 1
  • Jonathan V. Sweedler
    • 1
    Email author
  1. 1.Department of Chemistry and Beckman InstituteUniversity of Illinois at Urbana-ChampaignUrbanaUSA

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