1
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Ma X, Fernández FM. Advances in mass spectrometry imaging for spatial cancer metabolomics. MASS SPECTROMETRY REVIEWS 2024; 43:235-268. [PMID: 36065601 PMCID: PMC9986357 DOI: 10.1002/mas.21804] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/02/2022] [Accepted: 08/02/2022] [Indexed: 05/09/2023]
Abstract
Mass spectrometry (MS) has become a central technique in cancer research. The ability to analyze various types of biomolecules in complex biological matrices makes it well suited for understanding biochemical alterations associated with disease progression. Different biological samples, including serum, urine, saliva, and tissues have been successfully analyzed using mass spectrometry. In particular, spatial metabolomics using MS imaging (MSI) allows the direct visualization of metabolite distributions in tissues, thus enabling in-depth understanding of cancer-associated biochemical changes within specific structures. In recent years, MSI studies have been increasingly used to uncover metabolic reprogramming associated with cancer development, enabling the discovery of key biomarkers with potential for cancer diagnostics. In this review, we aim to cover the basic principles of MSI experiments for the nonspecialists, including fundamentals, the sample preparation process, the evolution of the mass spectrometry techniques used, and data analysis strategies. We also review MSI advances associated with cancer research in the last 5 years, including spatial lipidomics and glycomics, the adoption of three-dimensional and multimodal imaging MSI approaches, and the implementation of artificial intelligence/machine learning in MSI-based cancer studies. The adoption of MSI in clinical research and for single-cell metabolomics is also discussed. Spatially resolved studies on other small molecule metabolites such as amino acids, polyamines, and nucleotides/nucleosides will not be discussed in the context.
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Affiliation(s)
- Xin Ma
- School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Facundo M Fernández
- School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
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2
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Caleb Bagley M, Garrard KP, Muddiman DC. The development and application of matrix assisted laser desorption electrospray ionization: The teenage years. MASS SPECTROMETRY REVIEWS 2023; 42:35-66. [PMID: 34028071 DOI: 10.1002/mas.21696] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 05/24/2023]
Abstract
In the past 15 years, ambient ionization techniques have witnessed a significant incursion into the field of mass spectrometry imaging, demonstrating their ability to provide complementary information to matrix-assisted laser desorption ionization. Matrix-assisted laser desorption electrospray ionization is one such technique that has evolved since its first demonstrations with ultraviolet lasers coupled to Fourier transform-ion cyclotron resonance mass spectrometers to extensive use with infrared lasers coupled to orbitrap-based mass spectrometers. Concurrently, there have been transformative developments of this imaging platform due to the high level of control the principal group has retained over the laser technology, data acquisition software (RastirX), instrument communication, and image processing software (MSiReader). This review will discuss the developments of MALDESI since its first laboratory demonstration in 2005 to the most recent advances in 2021.
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Affiliation(s)
- Michael Caleb Bagley
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
| | - Kenneth P Garrard
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
- The Precision Engineering Consortium, North Carolina State University, Raleigh, North Carolina, USA
- Molecular Education, Technology, and Research Innovation Center (METRIC), North Carolina State University, Raleigh, North Carolina, USA
| | - David C Muddiman
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
- Molecular Education, Technology, and Research Innovation Center (METRIC), North Carolina State University, Raleigh, North Carolina, USA
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, North Carolina, USA
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3
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Tiquet M, La Rocca R, Kirnbauer S, Zoratto S, Van Kruining D, Quinton L, Eppe G, Martinez-Martinez P, Marchetti-Deschmann M, De Pauw E, Far J. FT-ICR Mass Spectrometry Imaging at Extreme Mass Resolving Power Using a Dynamically Harmonized ICR Cell with 1ω or 2ω Detection. Anal Chem 2022; 94:9316-9326. [PMID: 35604839 PMCID: PMC9260710 DOI: 10.1021/acs.analchem.2c00754] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
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MALDI mass spectrometry
imaging (MALDI MSI) is a powerful analytical
method for achieving 2D localization of compounds from thin sections
of typically but not exclusively biological samples. The dynamically
harmonized ICR cell (ParaCell) was recently introduced to achieve
extreme spectral resolution capable of providing the isotopic fine
structure of ions detected in complex samples. The latest improvement
in the ICR technology also includes 2ω detection, which significantly
reduces the transient time while preserving the nominal mass resolving
power of the ICR cell. High-resolution MS images acquired on FT-ICR
instruments equipped with 7T and 9.4T superconducting magnets and
the dynamically harmonized ICR cell operating at suboptimal parameters
suffered severely from the pixel-to-pixel shifting of m/z peaks due to space-charge effects. The resulting
profile average mass spectra have depreciated mass measurement accuracy
and mass resolving power under the instrument specifications that
affect the confidence level of the identified ions. Here, we propose
an analytical workflow based on the monitoring of the total ion current
to restrain the pixel-to-pixel m/z shift. Adjustment of the laser parameters is proposed to maintain
high spectral resolution and mass accuracy measurement within the
instrument specifications during MSI analyses. The optimized method
has been successfully employed in replicates to perform high-quality
MALDI MS images at resolving power (FWHM) above 1,000,000 in the lipid
mass range across the whole image for superconducting magnets of 7T
and 9.4T using 1 and 2ω detection. Our data also compare favorably
with MALDI MSI experiments performed on higher-magnetic-field superconducting
magnets, including the 21T MALDI FT-ICR prototype instrument of the
NHMFL group at Tallahassee, Florida.
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Affiliation(s)
- Mathieu Tiquet
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
| | - Raphaël La Rocca
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
| | - Stefan Kirnbauer
- Institute of Chemical Technologies and Analytics, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria.,Austrian Cluster for Tissue Regeneration, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Samuele Zoratto
- Institute of Chemical Technologies and Analytics, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria.,Austrian Cluster for Tissue Regeneration, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria.,Christian Doppler Laboratory for Skin Multimodal Imaging of Aging and Senescence, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Daan Van Kruining
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 50, 6229ER Maastricht, the Netherlands
| | - Loïc Quinton
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
| | - Gauthier Eppe
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
| | - Pilar Martinez-Martinez
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Universiteitssingel 50, 6229ER Maastricht, the Netherlands
| | - Martina Marchetti-Deschmann
- Institute of Chemical Technologies and Analytics, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria.,Austrian Cluster for Tissue Regeneration, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria.,Christian Doppler Laboratory for Skin Multimodal Imaging of Aging and Senescence, TU Wien (Vienna University of Technology), Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
| | - Johann Far
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, Allée de la Chimie 6-Quartier Agora, 4000 Liège, Belgium
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4
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Eriksson J, Sánchez Brotons A, Rezeli M, Suits F, Markó-Varga G, Horvatovich P. MSIWarp: A General Approach to Mass Alignment in Mass Spectrometry Imaging. Anal Chem 2020; 92:16138-16148. [PMID: 33317272 PMCID: PMC7745203 DOI: 10.1021/acs.analchem.0c03833] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/16/2020] [Indexed: 02/02/2023]
Abstract
Mass spectrometry imaging (MSI) is a technique that provides comprehensive molecular information with high spatial resolution from tissue. Today, there is a strong push toward sharing data sets through public repositories in many research fields where MSI is commonly applied; yet, there is no standardized protocol for analyzing these data sets in a reproducible manner. Shifts in the mass-to-charge ratio (m/z) of molecular peaks present a major obstacle that can make it impossible to distinguish one compound from another. Here, we present a label-free m/z alignment approach that is compatible with multiple instrument types and makes no assumptions on the sample's molecular composition. Our approach, MSIWarp (https://github.com/horvatovichlab/MSIWarp), finds an m/z recalibration function by maximizing a similarity score that considers both the intensity and m/z position of peaks matched between two spectra. MSIWarp requires only centroid spectra to find the recalibration function and is thereby readily applicable to almost any MSI data set. To deal with particularly misaligned or peak-sparse spectra, we provide an option to detect and exclude spurious peak matches with a tailored random sample consensus (RANSAC) procedure. We evaluate our approach with four publicly available data sets from both time-of-flight (TOF) and Orbitrap instruments and demonstrate up to 88% improvement in m/z alignment.
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Affiliation(s)
| | - Alejandro Sánchez Brotons
- Department
of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Melinda Rezeli
- Department
of Biomedical Engineering, Lund University, Lund 221 00, Sweden
| | - Frank Suits
- IBM
Research - Australia, 60 City Road, Southbank, VIC 3006, Australia
| | - György Markó-Varga
- Department
of Biomedical Engineering, Lund University, Lund 221 00, Sweden
| | - Peter Horvatovich
- Department
of Biomedical Engineering, Lund University, Lund 221 00, Sweden
- Department
of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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5
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Gavard R, Jones HE, Palacio Lozano DC, Thomas MJ, Rossell D, Spencer SEF, Barrow MP. KairosMS: A New Solution for the Processing of Hyphenated Ultrahigh Resolution Mass Spectrometry Data. Anal Chem 2020; 92:3775-3786. [DOI: 10.1021/acs.analchem.9b05113] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Remy Gavard
- MAS CDT, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Hugh E. Jones
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | | | - Mary J. Thomas
- MAS CDT, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - David Rossell
- Department of Statistics, University of Warwick, Coventry CV4 7AL, United Kingdom
- Department of Economics & Business, Universitat Pompeu Fabra, Barcelona 08005, Spain
| | - Simon E. F. Spencer
- Department of Statistics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Mark P. Barrow
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
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6
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Li Y, Li L. Mass Accuracy Check Using Common Background Peaks for Improving Metabolome Data Quality in Chemical Isotope Labeling LC-MS. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:1733-1741. [PMID: 31140076 DOI: 10.1007/s13361-019-02248-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/24/2019] [Accepted: 05/05/2019] [Indexed: 06/09/2023]
Abstract
Chemical isotope labeling (CIL) LC-MS is a highly sensitive and quantitative method for metabolome analysis. Because of a large number of peaks detectable in a sample and the need of running many samples in a metabolomics project, any significant change in mass measurement accuracy during the whole period of running samples can adversely affect the downstream peak alignment and quantitative analysis. Herein, we report a rapid method to check the mass accuracy of individual spectra in each CIL LC-MS run in order to flag up any run containing spectra with accuracy drift that falls outside the expected error. The flagged run may be re-run or discarded before merging with other runs for peak alignment and analysis. This method is based on the observation that some background signals are commonly detected in almost all spectra collected in CIL LC-MS runs. A mass accuracy check (MAC) software program has been developed to first find the common background mass peaks and then use them as mass references to calculate any mass shifts over the course of multiple sample runs. Using a metabolome dataset of 324 human cerebrospinal fluid (CSF) samples and 35 quality control (QC) samples produced by CIL LC-MS, we show that this accuracy check method can streamline the initial raw data processing for downstream analysis in metabolomics.
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Affiliation(s)
- Yunong Li
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Liang Li
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada.
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7
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Brochu F, Plante PL, Drouin A, Gagnon D, Richard D, Durocher F, Diorio C, Marchand M, Corbeil J, Laviolette F. Mass spectra alignment using virtual lock-masses. Sci Rep 2019; 9:8469. [PMID: 31186508 PMCID: PMC6560045 DOI: 10.1038/s41598-019-44923-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 05/08/2019] [Indexed: 12/18/2022] Open
Abstract
Mass spectrometry is a valued method to evaluate the metabolomics content of a biological sample. The recent advent of rapid ionization technologies such as Laser Diode Thermal Desorption (LDTD) and Direct Analysis in Real Time (DART) has rendered high-throughput mass spectrometry possible. It is used for large-scale comparative analysis of populations of samples. In practice, many factors resulting from the environment, the protocol, and even the instrument itself, can lead to minor discrepancies between spectra, rendering automated comparative analysis difficult. In this work, a sequence/pipeline of algorithms to correct variations between spectra is proposed. The algorithms correct multiple spectra by identifying peaks that are common to all and, from those, computes a spectrum-specific correction. We show that these algorithms increase comparability within large datasets of spectra, facilitating comparative analysis, such as machine learning.
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Affiliation(s)
- Francis Brochu
- Big Data Research Center, Université Laval, Québec, Qc, Canada. .,Département d'Informatique et Génie Logiciel, Université Laval, Québec, Qc, Canada.
| | - Pier-Luc Plante
- Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada
| | - Alexandre Drouin
- Big Data Research Center, Université Laval, Québec, Qc, Canada.,Département d'Informatique et Génie Logiciel, Université Laval, Québec, Qc, Canada
| | - Dominic Gagnon
- Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada.,Infectious Disease Reasearch Center, Université Laval, Québec, Qc, Canada
| | - Dave Richard
- Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada.,Infectious Disease Reasearch Center, Université Laval, Québec, Qc, Canada
| | - Francine Durocher
- Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada.,Department of Molecular Medicine, Université Laval, Québec, Qc, Canada
| | - Caroline Diorio
- Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada.,Department of Social and Preventative Medicine, Université Laval, Québec, Qc, Canada
| | - Mario Marchand
- Big Data Research Center, Université Laval, Québec, Qc, Canada.,Département d'Informatique et Génie Logiciel, Université Laval, Québec, Qc, Canada
| | - Jacques Corbeil
- Big Data Research Center, Université Laval, Québec, Qc, Canada.,Centre de Recherche du CHU de Québec, Université Laval, Québec, Qc, Canada.,Department of Molecular Medicine, Université Laval, Québec, Qc, Canada
| | - François Laviolette
- Big Data Research Center, Université Laval, Québec, Qc, Canada.,Département d'Informatique et Génie Logiciel, Université Laval, Québec, Qc, Canada
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8
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Increased throughput and ultra-high mass resolution in DESI FT-ICR MS imaging through new-generation external data acquisition system and advanced data processing approaches. Sci Rep 2019; 9:8. [PMID: 30626890 PMCID: PMC6327097 DOI: 10.1038/s41598-018-36957-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 11/28/2018] [Indexed: 12/20/2022] Open
Abstract
Desorption electrospray ionisation-mass spectrometry imaging (DESI-MSI) is a powerful imaging technique for the analysis of complex surfaces. However, the often highly complex nature of biological samples is particularly challenging for MSI approaches, as options to appropriately address molecular complexity are limited. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) offers superior mass accuracy and mass resolving power, but its moderate throughput inhibits broader application. Here we demonstrate the dramatic gains in mass resolution and/or throughput of DESI-MSI on an FT-ICR MS by developing and implementing a sophisticated data acquisition and data processing pipeline. The presented pipeline integrates, for the first time, parallel ion accumulation and detection, post-processing absorption mode Fourier transform and pixel-by-pixel internal re-calibration. To achieve that, first, we developed and coupled an external high-performance data acquisition system to an FT-ICR MS instrument to record the time-domain signals (transients) in parallel with the instrument’s built-in electronics. The recorded transients were then processed by the in-house developed computationally-efficient data processing and data analysis software. Importantly, the described pipeline is shown to be applicable even to extremely large, up to 1 TB, imaging datasets. Overall, this approach provides improved analytical figures of merits such as: (i) enhanced mass resolution at no cost in experimental time; and (ii) up to 4-fold higher throughput while maintaining a constant mass resolution. Using this approach, we not only demonstrate the record 1 million mass resolution for lipid imaging from brain tissue, but explicitly show such mass resolution is required to resolve the complexity of the lipidome.
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9
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Ràfols P, Castillo ED, Yanes O, Brezmes J, Correig X. Novel automated workflow for spectral alignment and mass calibration in MS imaging using a sputtered Ag nanolayer. Anal Chim Acta 2018; 1022:61-69. [DOI: 10.1016/j.aca.2018.03.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/12/2018] [Accepted: 03/20/2018] [Indexed: 02/06/2023]
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10
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Trim PJ, Snel MF. Small molecule MALDI MS imaging: Current technologies and future challenges. Methods 2016; 104:127-41. [DOI: 10.1016/j.ymeth.2016.01.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 11/25/2022] Open
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11
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Kulkarni P, Kaftan F, Kynast P, Svatoš A, Böcker S. Correcting mass shifts: A lock mass-free recalibration procedure for mass spectrometry imaging data. Anal Bioanal Chem 2015; 407:7603-13. [DOI: 10.1007/s00216-015-8935-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 07/18/2015] [Accepted: 07/21/2015] [Indexed: 11/30/2022]
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12
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Rosen EP, Bokhart MT, Ghashghaei HT, Muddiman DC. Influence of Desorption Conditions on Analyte Sensitivity and Internal Energy in Discrete Tissue or Whole Body Imaging by IR-MALDESI. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:899-910. [PMID: 25840812 PMCID: PMC4425634 DOI: 10.1007/s13361-015-1114-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 02/22/2015] [Accepted: 02/22/2015] [Indexed: 05/10/2023]
Abstract
Analyte signal in a laser desorption/postionization scheme such as infrared matrix-assisted laser desorption electrospray ionization (IR-MALDESI) is strongly coupled to the degree of overlap between the desorbed plume of neutral material from a sample and an orthogonal electrospray. In this work, we systematically examine the effect of desorption conditions on IR-MALDESI response to pharmaceutical drugs and endogenous lipids in biological tissue using a design of experiments approach. Optimized desorption conditions have then been used to conduct an untargeted lipidomic analysis of whole body sagittal sections of neonate mouse. IR-MALDESI response to a wide range of lipid classes has been demonstrated, with enhanced lipid coverage received by varying the laser wavelength used for mass spectrometry imaging (MSI). Targeted MS(2) imaging (MS(2)I) of an analyte, cocaine, deposited beneath whole body sections allowed determination of tissue-specific ion response factors, and CID fragments of cocaine were monitored to comment on wavelength-dependent internal energy deposition based on the "survival yield" method.
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Affiliation(s)
- Elias P. Rosen
- W.M. Keck FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
| | - Mark T. Bokhart
- W.M. Keck FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
| | - H. Troy Ghashghaei
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - David C. Muddiman
- W.M. Keck FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
- Author for Correspondence David C. Muddiman, Ph.D., W.M. Keck FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, Phone: 919-513-0084,
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13
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Nagornov KO, Kozhinov AN, Tsybin OY, Tsybin YO. Ion trap with narrow aperture detection electrodes for Fourier transform ion cyclotron resonance mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:741-751. [PMID: 25773900 DOI: 10.1007/s13361-015-1089-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 01/27/2015] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
The current paradigm in ion trap (cell) design for Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) is the ion detection with wide aperture detection electrodes. Specifically, excitation and detection electrodes are typically 90° wide and positioned radially at a similar distance from the ICR cell axis. Here, we demonstrate that ion detection with narrow aperture detection electrodes (NADEL) positioned radially inward of the cell's axis is feasible and advantageous for FT-ICR MS. We describe design details and performance characteristics of a 10 T FT-ICR MS equipped with a NADEL ICR cell having a pair of narrow aperture (flat) detection electrodes and a pair of standard 90° excitation electrodes. Despite a smaller surface area of the detection electrodes, the sensitivity of the NADEL ICR cell is not reduced attributable to improved excite field distribution, reduced capacitance of the detection electrodes, and their closer positioning to the orbits of excited ions. The performance characteristics of the NADEL ICR cell are comparable with the state-of-the-art FT-ICR MS implementations for small molecule, peptide, protein, and petroleomics analyses. In addition, the NADEL ICR cell's design improves the flexibility of ICR cells and facilitates implementation of advanced capabilities (e.g., quadrupolar ion detection for improved mainstream applications). It also creates an intriguing opportunity for addressing the major bottleneck in FTMS-increasing its throughput via simultaneous acquisition of multiple transients or via generation of periodic non-sinusoidal transient signals.
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Affiliation(s)
- Konstantin O Nagornov
- Biomolecular Mass Spectrometry Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
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14
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Barry JA, Groseclose MR, Robichaud G, Castellino S, Muddiman DC. Assessing drug and metabolite detection in liver tissue by UV-MALDI and IR-MALDESI mass spectrometry imaging coupled to FT-ICR MS. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2015; 377:448-155. [PMID: 26056514 PMCID: PMC4456684 DOI: 10.1016/j.ijms.2014.05.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Determining the distribution of a drug and its metabolites within tissue is a key facet of evaluating drug candidates. Drug distribution can have a significant implication in appraising drug efficacy and potential toxicity. The specificity and sensitivity of mass spectrometry imaging (MSI) make it a perfect complement to the analysis of drug distributions in tissue. The detection of lapatinib as well as several of its metabolites in liver tissue was determined by MSI using infrared matrix-assisted laser desorption electrospray ionization (IR-MALDESI) coupled to high resolving power Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers. IR-MALDESI required minimal sample preparation while maintaining high sensitivity. The effect of the electrospray solvent composition on IR-MALDESI MSI signal from tissue analysis was investigated and an empirical comparison of IR-MALDESI and UV-MALDI for MSI analysis is also presented.
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Affiliation(s)
- Jeremy A. Barry
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
| | - M. Reid Groseclose
- Department of Drug Metabolism& Pharmacokinetics, Platform Science & Technology, GlaxoSmithKline, Research Triangle Park, North Carolina
| | - Guillaume Robichaud
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
| | - Stephen Castellino
- Department of Drug Metabolism& Pharmacokinetics, Platform Science & Technology, GlaxoSmithKline, Research Triangle Park, North Carolina
| | - David C. Muddiman
- W.M. Keck FT-ICR Mass Spectrometry Laboratory, Department of Chemistry, North Carolina State University, Raleigh, North Carolina
- Author for Correspondence David C. Muddiman, Ph.D. W.M. Keck FT-ICR Mass Spectrometry Laboratory Department of Chemistry North Carolina State University Raleigh, North Carolina 27695 Phone: 919-513-0084 Fax: 919-513-7993
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Flanigan P, Levis R. Ambient femtosecond laser vaporization and nanosecond laser desorption electrospray ionization mass spectrometry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2014; 7:229-256. [PMID: 25014343 DOI: 10.1146/annurev-anchem-071213-020343] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Recent investigations of ambient laser-based transfer of molecules into the gas phase for subsequent mass spectral analysis have undergone a renaissance resulting from the separation of vaporization and ionization events. Here, we seek to provide a snapshot of recent femtosecond (fs) duration laser vaporization and nanosecond (ns) duration laser desorption electrospray ionization mass spectrometry experiments. The former employs pulse durations of <100 fs to enable matrix-free laser vaporization with little or no fragmentation. When coupled to electrospray ionization, femtosecond laser vaporization provides a universal, rapid mass spectral analysis method requiring no sample workup. Remarkably, laser pulses with intensities exceeding 10(13) W cm(-2) desorb intact macromolecules, such as proteins, and even preserve the condensed phase of folded or unfolded protein structures according to the mass spectral charge state distribution, as demonstrated for cytochrome c and lysozyme. Because of the ability to vaporize and ionize multiple components from complex mixtures for subsequent analysis, near perfect classification of explosive formulations, plant tissue phenotypes, and even the identity of the manufacturer of smokeless powders can be determined by multivariate statistics. We also review the more mature field of nanosecond laser desorption for ambient mass spectrometry, covering the wide range of systems analyzed, the need for resonant absorption, and the spatial imaging of complex systems like tissue samples.
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Affiliation(s)
- Paul Flanigan
- Center for Advanced Photonics Research, Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122; ,
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Smith DF, Kilgour DPA, Konijnenburg M, O'Connor PB, Heeren RMA. Absorption mode FTICR mass spectrometry imaging. Anal Chem 2013; 85:11180-4. [PMID: 24175640 DOI: 10.1021/ac403039t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Fourier transform ion cyclotron resonance mass spectrometry offers the highest mass resolving power for molecular imaging experiments. This high mass resolving power ensures that closely spaced peaks at the same nominal mass are resolved for proper image generation. Typically higher magnetic fields are used to increase mass resolving power. However, a gain in mass resolving power can also be realized by phase correction of the data for absorption mode display. In addition to mass resolving power, absorption mode offers higher mass accuracy and signal-to-noise ratio over the conventional magnitude mode. Here, we present the first use of absorption mode for Fourier transform ion cyclotron resonance mass spectrometry imaging. The Autophaser algorithm is used to phase correct each spectrum (pixel) in the image, and then, these parameters are used by the Chameleon work-flow based data processing software to generate absorption mode "Datacubes" for image and spectral viewing. Absorption mode reveals new mass and spatial features that are not resolved in magnitude mode and results in improved selected ion image contrast.
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Affiliation(s)
- Donald F Smith
- FOM Institute AMOLF , Science Park 104, Amsterdam, North Holland, 1098 XG The Netherlands
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