Abstract
Direct tissue analysis using matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS) provides the means for in situ molecular analysis of a wide variety of biomolecules. This technology—known as imaging mass spectrometry (IMS)—allows the measurement of biomolecules in their native biological environments without the need for target-specific reagents such as antibodies. In this study, we applied the IMS technique to formalin-fixed paraffin-embedded samples to identify a substance(s) responsible for the intestinal obstruction caused by an unidentified foreign body. In advance of IMS analysis, some pretreatments were applied. After the deparaffinization of sections, samples were subjected to enzyme digestion. The sections co-crystallized with matrix were desorbed and ionized by a laser pulse with scanning. A combination of α-amylase digestion and the 2,5-dihydroxybenzoic acid matrix gave the best mass spectrum. With the IMS Convolution software which we developed, we could automatically extract meaningful signals from the IMS datasets. The representative peak values were m/z 1,013, 1,175, 1,337, 1,499, 1,661, 1,823, and 1,985. Thus, it was revealed that the material was polymer with a 162-Da unit size, calculated from the even intervals. In comparison with the mass spectra of the histopathological specimen and authentic materials, the main component coincided with amylopectin rather than amylose. Tandem MS analysis proved that the main components were oligosaccharides. Finally, we confirmed the identification of amylopectin by staining with periodic acid-Schiff and iodine. These results for the first time show the advantages of MALDI-IMS in combination with enzyme digestion for the direct analysis of oligosaccharides as a major component of histopathological samples.
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Abbreviations
- DHB:
-
2,5-Dihydroxybenzoic acid
- FFPE:
-
Formalin-fixed paraffin-embedded
- HE:
-
Hematoxylin and eosin
- IMS:
-
Imaging mass spectrometry
- ITO:
-
Indium tin oxide
- MALDI:
-
Matrix-assisted laser desorption/ionization
- PAS:
-
Periodic acid-Schiff stain
- ROI:
-
Region of interest
- CT:
-
Computed tomography
References
Yao I, Sugiura Y, Matsumoto M, Setou M (2008) In situ proteomics with imaging mass spectrometry and principal component analysis in the Scrapper-knockout mouse brain. Proteomics 8(18):3692–3701
Sugiura Y, Setou M (2010) Imaging mass spectrometry for visualization of drug and endogenous metabolite distribution: toward in situ pharmacometabolomes. J Neuroimmune Pharmacol 5(1):31–43. doi:10.1007/s11481-009-9162-6
Bernier UR, Kline DL, Barnard DR, Schreck CE, Yost RA (2000) Analysis of human skin emanations by gas chromatography/mass spectrometry. 2. Identification of volatile compounds that are candidate attractants for the yellow fever mosquito (Aedes aegypti). Anal Chem 72(4):747–756
Garrett TJ, Yost RA (2006) Analysis of intact tissue by intermediate-pressure MALDI on a linear ion trap mass spectrometer. Anal Chem 78(7):2465–2469
Drexler DM, Garrett TJ, Cantone JL, Diters RW, Mitroka JG, Prieto Conaway MC, Adams SP, Yost RA, Sanders M (2007) Utility of imaging mass spectrometry (IMS) by matrix-assisted laser desorption ionization (MALDI) on an ion trap mass spectrometer in the analysis of drugs and metabolites in biological tissues. J Pharmacol Toxicol Methods 55(3):279–288
Shimma S, Sugiura Y, Hayasaka T, Hoshikawa Y, Noda T, Setou M (2007) MALDI-based imaging mass spectrometry revealed abnormal distribution of phospholipids in colon cancer liver metastasis. J Chromatogr 855(1):98–103
Stoeckli M, Chaurand P, Hallahan DE, Caprioli RM (2001) Imaging mass spectrometry: a new technology for the analysis of protein expression in mammalian tissues. Nat Med 7(4):493–496
Setou M, Heeren RM, Stoeckli M, Simma S, Matsumoto M (2007) Mass microscopy. Seikagaku 79(9):874–879
Rubakhin SS, Churchill JD, Greenough WT, Sweedler JV (2006) Profiling signaling peptides in single mammalian cells using mass spectrometry. Anal Chem 78(20):7267–7272
Luxembourg SL, Mize TH, McDonnell LA, Heeren RM (2004) High-spatial resolution mass spectrometric imaging of peptide and protein distributions on a surface. Anal Chem 76(18):5339–5344
Cooks RG, Ouyang Z, Takats Z, Wiseman JM (2006) Detection technologies. Ambient mass spectrometry. Science (New York, NY) 311(5767):1566–1570
Sugiura Y, Shimma S, Setou M (2006) Two-step matrix application technique to improve ionization efficiency for matrix-assisted laser desorption/ionization in imaging mass spectrometry. Anal Chem 78(24):8227–8235
Shimma S, Sugiura Y, Hayasaka T, Zaima N, Matsumoto M, Setou M (2008) Mass imaging and identification of biomolecules with MALDI-QIT-TOF-based system. Anal Chem 80(3):878–885
Landgraf RR, Garrett TJ, Calcutt NA, Stacpoole PW, Yost RA (2007) MALDI-linear ion trap microprobe MS/MS studies of the effects of dichloroacetate on lipid content of nerve tissue. Anal Chem 79(21):8170–8175
Shimma S, Furuta M, Ichimura K, Yoshida Y, Setou M (2006) A novel approach to in situ proteome analysis using a chemical inkjet printing technology and MALDI-QIT-TOF tandem mass spectrometer. J Mass Spectrom Soc Japan 54:133–140
Groseclose MR, Andersson M, Hardesty WM, Caprioli RM (2007) Identification of proteins directly from tissue: in situ tryptic digestions coupled with imaging mass spectrometry. J Mass Spectrom 42(2):254–262
Walch A, Rauser S, Deininger SO, Hofler H (2008) MALDI imaging mass spectrometry for direct tissue analysis: a new frontier for molecular histology. Histochem Cell Biol 130(3):421–434
Caprioli RM, Farmer TB, Gile J (1997) Molecular imaging of biological samples: localization of peptides and proteins using MALDI-TOF MS. Anal Chem 69(23):4751–4760
Morita Y, Ikegami K, Goto-Inoue N, Hayasaka T, Zaima N, Tanaka H, Uehara T, Setoguchi T, Sakaguchi T, Igarashi H, Sugimura H, Setou M, Konno H (2009) Imaging mass spectrometry of gastric carcinoma in formalin-fixed paraffin-embedded tissue microarray. Cancer Sci 101(1):267–273
Ushijima M, Miyata S, Eguchi S, Kawakita M, Yoshimoto M, Iwase T, Akiyama F, Sakamoto G, Nagasaki K, Miki Y, Noda T, Hoshikawa Y, Matsuura M (2007) Common peak approach using mass spectrometry data sets for predicting the effects of anticancer drugs on breast cancer. Cancer Inform 3:285–293
Gahrton G (1964) Microspectrophotometric quantitation of the periodic acid-Schiff (PAS) reaction in human neutrophil leukocytes based on a model system of glycogen microdroplets. Exp Cell Res 34:488–506
Holness CL, Simmons DL (1993) Molecular cloning of CD68, a human macrophage marker related to lysosomal glycoproteins. Blood 81(6):1607–1613
Hayasaka T, Goto-Inoue N, Ushijima M, Yao I, Yuba-Kubo A, Wakui M, Kajihara S, Matsuura M, Setou M (2011) Development of imaging mass spectrometry (IMS) dataset extractor software, IMS convolution. Anal Bioanal Chem 401:183–193
Domon B, Costello CE (1988) Structure elucidation of glycosphingolipids and gangliosides using high-performance tandem mass spectrometry. Biochemistry 27(5):1534–1543
Acknowledgments
We thank Hosaka K, Saitou A, and Tarumi T for their assistance. We also thank Prof. Sugimura and lab members. This study is supported by Research Grants for PRESTO and SENTAN from Japan Science and Technology Agency to I. Yao.
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Yamada, M., Yao, I., Hayasaka, T. et al. Identification of oligosaccharides from histopathological sections by MALDI imaging mass spectrometry. Anal Bioanal Chem 402, 1921–1930 (2012). https://doi.org/10.1007/s00216-011-5622-y
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DOI: https://doi.org/10.1007/s00216-011-5622-y