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Zhao Y, Prideaux B, Baistrocchi S, Sheppard DC, Perlin DS. Beyond tissue concentrations: antifungal penetration at the site of infection. Med Mycol 2019; 57:S161-S167. [PMID: 30816968 DOI: 10.1093/mmy/myy067] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/05/2018] [Accepted: 07/14/2018] [Indexed: 12/17/2022] Open
Abstract
Despite advances in antifungal therapy, invasive fungal infections remain a significant cause of morbidity and mortality worldwide. One important factor contributing to the relative ineffectiveness of existing antifungal drugs is insufficient drug exposure at the site of infection. Despite the importance of this aspect of antifungal therapy, we generally lack a full appreciation of how antifungal drugs distribute, penetrate, and interact with their target organisms in different tissue subcompartments. A better understanding of drug distribution will be critical to guide appropriate use of currently available antifungal drugs, as well as to aid development of new agents. Herein we briefly review current perspectives of antifungal drug exposure at the site of infection and describe a new technique, matrix-assisted laser desorption ionization (MALDI) mass spectrometry imaging, which has the potential to greatly expand our understanding of drug penetration.
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Affiliation(s)
- Yanan Zhao
- Public Health Research Institute, New Jersey Medical School-Rutgers Biomedical and Health Sciences, Newark, NJ 07103
| | - Brendan Prideaux
- Public Health Research Institute, New Jersey Medical School-Rutgers Biomedical and Health Sciences, Newark, NJ 07103
| | - Shane Baistrocchi
- Departments of Medicine, Microbiology & Immunology, McGill University, Montreal, Quebec H4A 3J1
| | - Donald C Sheppard
- Departments of Medicine, Microbiology & Immunology, McGill University, Montreal, Quebec H4A 3J1
| | - David S Perlin
- Public Health Research Institute, New Jersey Medical School-Rutgers Biomedical and Health Sciences, Newark, NJ 07103
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2
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Kirwan JA, Brennan L, Broadhurst D, Fiehn O, Cascante M, Dunn WB, Schmidt MA, Velagapudi V. Preanalytical Processing and Biobanking Procedures of Biological Samples for Metabolomics Research: A White Paper, Community Perspective (for "Precision Medicine and Pharmacometabolomics Task Group"-The Metabolomics Society Initiative). Clin Chem 2018; 64:1158-1182. [PMID: 29921725 DOI: 10.1373/clinchem.2018.287045] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 05/01/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND The metabolome of any given biological system contains a diverse range of low molecular weight molecules (metabolites), whose abundances can be affected by the timing and method of sample collection, storage, and handling. Thus, it is necessary to consider the requirements for preanalytical processes and biobanking in metabolomics research. Poor practice can create bias and have deleterious effects on the robustness and reproducibility of acquired data. CONTENT This review presents both current practice and latest evidence on preanalytical processes and biobanking of samples intended for metabolomics measurement of common biofluids and tissues. It highlights areas requiring more validation and research and provides some evidence-based guidelines on best practices. SUMMARY Although many researchers and biobanking personnel are familiar with the necessity of standardizing sample collection procedures at the axiomatic level (e.g., fasting status, time of day, "time to freezer," sample volume), other less obvious factors can also negatively affect the validity of a study, such as vial size, material and batch, centrifuge speeds, storage temperature, time and conditions, and even environmental changes in the collection room. Any biobank or research study should establish and follow a well-defined and validated protocol for the collection of samples for metabolomics research. This protocol should be fully documented in any resulting study and should involve all stakeholders in its design. The use of samples that have been collected using standardized and validated protocols is a prerequisite to enable robust biological interpretation unhindered by unnecessary preanalytical factors that may complicate data analysis and interpretation.
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Affiliation(s)
- Jennifer A Kirwan
- Berlin Institute of Health, Berlin, Germany; .,Max Delbrück Center for Molecular Medicine, Berlin-Buch, Germany
| | - Lorraine Brennan
- UCD School of Agriculture and Food Science, Institute of Food and Health, UCD, Dublin, Ireland
| | | | - Oliver Fiehn
- NIH West Coast Metabolomics Center, UC Davis, Davis, CA
| | - Marta Cascante
- Department of Biochemistry and Molecular Biomedicine and IBUB, Universitat de Barcelona, Barcelona and Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBER-EHD), Madrid, Spain
| | - Warwick B Dunn
- School of Biosciences and Phenome Centre Birmingham, University of Birmingham, Birmingham, UK
| | - Michael A Schmidt
- Advanced Pattern Analysis and Countermeasures Group, Research Innovation Center, Colorado State University, Fort Collins, CO.,Sovaris Aerospace, LLC, Boulder, CO
| | - Vidya Velagapudi
- Metabolomics Unit, Institute for Molecular Medicine FIMM, HiLIFE, University of Helsinki, Helsinki, Finland.
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3
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Abstract
Drug metabolites have been monitored with various types of newly developed techniques and/or combination of common analytical methods, which could provide a great deal of information on metabolite profiling. Because it is not easy to analyze whole drug metabolites qualitatively and quantitatively, a single solution of analytical techniques is combined in a multilateral manner to cover the widest range of drug metabolites. Mass-based spectroscopic analysis of drug metabolites has been expanded with the help of other parameter-based methods. The current development of metabolism studies through contemporary pharmaceutical research are reviewed with an overview on conventionally used spectroscopic methods. Several technical approaches for conducting drug metabolic profiling through spectroscopic methods are discussed in depth.
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Affiliation(s)
- Jong-Jae Yi
- Department of Pharmacy, College of Pharmacy, CHA University, 120 Haeryong-ro, Pocheon-Si, Gyeonggi-do, 11160, Republic of Korea
| | - Kyeongsoon Park
- Department of Systems Biotechnology, College of Biotechnology and Natural Resources, Chung-Ang University, 4726 Seodong-daero, Anseong-Si, Gyeonggi-do, 17546, Republic of Korea
| | - Won-Je Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jin-Kyu Rhee
- Department of Food Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea.
| | - Woo Sung Son
- Department of Pharmacy, College of Pharmacy, CHA University, 120 Haeryong-ro, Pocheon-Si, Gyeonggi-do, 11160, Republic of Korea.
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4
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Unraveling Drug Penetration of Echinocandin Antifungals at the Site of Infection in an Intra-abdominal Abscess Model. Antimicrob Agents Chemother 2017; 61:AAC.01009-17. [PMID: 28739797 PMCID: PMC5610477 DOI: 10.1128/aac.01009-17] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 07/19/2017] [Indexed: 12/22/2022] Open
Abstract
Intra-abdominal candidiasis (IAC) is a prominent invasive fungal infection associated with high mortality. Prompt antifungal therapy and source control are crucial for successful treatment. Echinocandin antifungal drugs are first-line agents; however, their clinical effectiveness is highly variable, with known potential for breakthrough resistance, and little is known about drug exposure at the site of infection. Using matrix-assisted desorption ionization mass spectrometry imaging technology, we investigated the spatial and quantitative distribution in tissue lesions for two echinocandin drugs, micafungin and CD101, in a clinically relevant IAC mouse model. Drug accumulation within lesions was observed with both drugs at their humanized therapeutic doses. CD101, but not micafungin, accumulated in lesions at levels above the mutant prevention concentration of the infecting strain. These findings indicate that current echinocandin drugs are limited by penetration at the site of infection and have implications for clinical outcomes and emergence of resistance in patients with IAC.
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5
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Galli M, Zoppis I, Smith A, Magni F, Mauri G. Machine learning approaches in MALDI-MSI: clinical applications. Expert Rev Proteomics 2016; 13:685-96. [PMID: 27322705 DOI: 10.1080/14789450.2016.1200470] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Despite the unquestionable advantages of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging in visualizing the spatial distribution and the relative abundance of biomolecules directly on-tissue, the yielded data is complex and high dimensional. Therefore, analysis and interpretation of this huge amount of information is mathematically, statistically and computationally challenging. AREAS COVERED This article reviews some of the challenges in data elaboration with particular emphasis on machine learning techniques employed in clinical applications, and can be useful in general as an entry point for those who want to study the computational aspects. Several characteristics of data processing are described, enlightening advantages and disadvantages. Different approaches for data elaboration focused on clinical applications are also provided. Practical tutorial based upon Orange Canvas and Weka software is included, helping familiarization with the data processing. Expert commentary: Recently, MALDI-MSI has gained considerable attention and has been employed for research and diagnostic purposes, with successful results. Data dimensionality constitutes an important issue and statistical methods for information-preserving data reduction represent one of the most challenging aspects. The most common data reduction methods are characterized by collecting independent observations into a single table. However, the incorporation of relational information can improve the discriminatory capability of the data.
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Affiliation(s)
- Manuel Galli
- a Department of Medicine and Surgery , University of Milano Bicocca , Monza Brianza , Italy
| | - Italo Zoppis
- b Department of Informatics, Systems and Communication , University of Milano Bicocca , Milano , Italy
| | - Andrew Smith
- a Department of Medicine and Surgery , University of Milano Bicocca , Monza Brianza , Italy
| | - Fulvio Magni
- a Department of Medicine and Surgery , University of Milano Bicocca , Monza Brianza , Italy
| | - Giancarlo Mauri
- b Department of Informatics, Systems and Communication , University of Milano Bicocca , Milano , Italy
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6
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Schey KL, Hachey AJ, Rose KL, Grey AC. MALDI imaging mass spectrometry of Pacific White Shrimp L. vannamei and identification of abdominal muscle proteins. Proteomics 2016; 16:1767-74. [PMID: 26990122 DOI: 10.1002/pmic.201500531] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/26/2016] [Accepted: 03/11/2016] [Indexed: 02/06/2023]
Abstract
MALDI imaging mass spectrometry (IMS) has been applied to whole animal tissue sections of Pacific White Shrimp, Litopenaeus vannamei, in an effort to identify and spatially localize proteins in specific organ systems. Frozen shrimp were sectioned along the ventral-dorsal axis and methods were optimized for matrix application. In addition, tissue microextraction and homogenization was conducted followed by top-down LC-MS/MS analysis of intact proteins and searches of shrimp EST databases to identify imaged proteins. IMS images revealed organ system specific protein signals that highlighted the hepatopancreas, heart, nervous system, musculature, and cuticle. Top-down proteomics identification of abdominal muscle proteins revealed the sequence of the most abundant muscle protein that has no sequence homology to known proteins. Additional identifications of abdominal muscle proteins included titin, troponin-I, ubiquitin, as well as intact and multiple truncated forms of flightin; a protein known to function in high frequency contraction of insect wing muscles. The combined use of imaging mass spectrometry and top-down proteomics allowed for identification of novel proteins from the sparsely populated shrimp protein databases.
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Affiliation(s)
- Kevin L Schey
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA.,Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Amanda J Hachey
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Kristie L Rose
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA.,Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Angus C Grey
- School of Medical Sciences, University of Auckland, Auckland, New Zealand
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7
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Abstract
Pharmacodynamics and toxicodynamics are the study of the biochemical and physiological effects of therapeutic agents and toxicants and their mechanisms of action. MALDI-MS imaging offers great potential for the study of pharmaco/toxicodynamic responses in tissue owing is its ability to study multiple biomarkers simultaneously in a label-free manner. Here, existing examples of such studies examining anticancer drugs and topically applied treatments are described. Examination of the literature shows that the use of MS imaging in pharmaco/toxicodynamic studies is in fact quite low. The reasons for this are discussed and potential developments in the methodology that might lead to its further use are described.
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8
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Ait-Belkacem R, Berenguer C, Villard C, Ouafik L, Figarella-Branger D, Beck A, Chinot O, Lafitte D. Monitoring therapeutic monoclonal antibodies in brain tumor. MAbs 2015; 6:1385-93. [PMID: 25484065 DOI: 10.4161/mabs.34405] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Bevacizumab induces normalization of abnormal blood vessels, making them less leaky. By binding to vascular endothelial growth factor, it indirectly attacks the vascular tumor mass. The optimal delivery of targeted therapies including monoclonal antibodies or anti-angiogenesis drugs to the target tissue highly depends on the blood-brain barrier permeability. It is therefore critical to investigate how drugs effectively reach the tumor. In situ investigation of drug distribution could provide a better understanding of pharmacological agent action and optimize chemotherapies for solid tumors. We developed an imaging method coupled to protein identification using matrix-assisted laser desorption/ionization mass spectrometry. This approach monitored bevacizumab distribution within the brain structures, and especially within the tumor, without any labeling.
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Key Words
- 5 DAN, 1
- 5-diaminonaphtalene
- BBB, blood-brain barrier
- CRC, metastatic colorectal cancer
- CSF, cerebrospinal fluid; 1
- EMA, European Medicines Agency
- FDA, Food and Drug Administration
- GBM, glioblastoma multiforme
- IMS, imaging mass spectrometry
- ISD, in-source decay
- ITO, indium tin oxide
- LC-MS/MS, liquid chromatography coupled to tandem mass spectrometry
- MALDI imaging mass spectrometry
- MALDI, matrix-assisted laser desorption/ionization
- NSCLC, non-small cell lung cancer
- RMS, root mean square
- RP-HPLC, reversed phase high-performance liquid chromatography
- TOF, time of flight
- VEGF, vascular endothelial growth factor
- VEGFR, vascular endothelial growth factor receptor
- VH, variable domain of the heavy chain
- VL, variable domain of the light chain
- WHO, world health organization
- bevacizumab
- glioblastoma multiforme
- mAbs, monoclonal antibodies
- monoclonal antibodies
- pE, pyroglutamate
- palivizumab
- top down in source decay
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Affiliation(s)
- Rima Ait-Belkacem
- a Aix-Marseille Université Inserm ; CRO2 UMR S-911; Marseille , France
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9
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Fernández R, Lage S, Abad-García B, Barceló-Coblijn G, Terés S, López DH, Guardiola-Serrano F, Martín ML, Escribá PV, Fernández JA. Analysis of the lipidome of xenografts using MALDI-IMS and UHPLC-ESI-QTOF. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:1237-1246. [PMID: 24760294 DOI: 10.1007/s13361-014-0882-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/10/2014] [Accepted: 03/10/2014] [Indexed: 06/03/2023]
Abstract
Human tumor xenografts in immunodeficient mice are a very popular model to study the development of cancer and to test new drug candidates. Among the parameters analyzed are the variations in the lipid composition, as they are good indicators of changes in the cellular metabolism. Here, we present a study on the distribution of lipids in xenografts of NCI-H1975 human lung cancer cells, using MALDI imaging mass spectrometry and UHPLC-ESI-QTOF. The identification of lipids directly from the tissue by MALDI was aided by the comparison with identification using ESI ionization in lipid extracts from the same xenografts. Lipids belonging to PCs, PIs, SMs, DAG, TAG, PS, PA, and PG classes were identified and their distribution over the xenograft was determined. Three areas were identified in the xenograft, corresponding to cells in different metabolic stages and to a layer of adipose tissue that covers the xenograft.
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Affiliation(s)
- Roberto Fernández
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
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10
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Djidja MC, Chang J, Hadjiprocopis A, Schmich F, Sinclair J, Mršnik M, Schoof EM, Barker HE, Linding R, Jørgensen C, Erler JT. Identification of hypoxia-regulated proteins using MALDI-mass spectrometry imaging combined with quantitative proteomics. J Proteome Res 2014; 13:2297-313. [PMID: 24702160 DOI: 10.1021/pr401056c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hypoxia is present in most solid tumors and is clinically correlated with increased metastasis and poor patient survival. While studies have demonstrated the role of hypoxia and hypoxia-regulated proteins in cancer progression, no attempts have been made to identify hypoxia-regulated proteins using quantitative proteomics combined with MALDI-mass spectrometry imaging (MALDI-MSI). Here we present a comprehensive hypoxic proteome study and are the first to investigate changes in situ using tumor samples. In vitro quantitative mass spectrometry analysis of the hypoxic proteome was performed on breast cancer cells using stable isotope labeling with amino acids in cell culture (SILAC). MS analyses were performed on laser-capture microdissected samples isolated from normoxic and hypoxic regions from tumors derived from the same cells used in vitro. MALDI-MSI was used in combination to investigate hypoxia-regulated protein localization within tumor sections. Here we identified more than 100 proteins, both novel and previously reported, that were associated with hypoxia. Several proteins were localized in hypoxic regions, as identified by MALDI-MSI. Visualization and data extrapolation methods for the in vitro SILAC data were also developed, and computational mapping of MALDI-MSI data to IHC results was applied for data validation. The results and limitations of the methodologies described are discussed.
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Affiliation(s)
- Marie-Claude Djidja
- Hypoxia and Metastasis Team and ‡Cell Communications Team, Cancer Research U.K. Tumour Cell Signalling Unit, Division of Cancer Biology, The Institute of Cancer Research , London, United Kingdom
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11
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Ait-Belkacem R, Berenguer C, Villard C, Ouafik L, Figarella-Branger D, Chinot O, Lafitte D. MALDI imaging and in-source decay for top-down characterization of glioblastoma. Proteomics 2014; 14:1290-301. [PMID: 24376047 DOI: 10.1002/pmic.201300329] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 09/27/2013] [Accepted: 10/04/2013] [Indexed: 01/15/2023]
Abstract
Glioblastoma multiforme is one of the most common intracranial tumors encountered in adults. This tumor of very poor prognosis is associated with a median survival rate of approximately 14 months. One of the major issues to better understand the biology of these tumors and to optimize the therapy is to obtain the molecular structure of glioblastoma. MALDI molecular imaging enables location of molecules in tissues without labeling. However, molecular identification in situ is not an easy task. In this paper, we used MALDI imaging coupled to in-source decay to characterize markers of this pathology. We provided MALDI molecular images up to 30 μm spatial resolution of mouse brain tissue sections. MALDI images showed the heterogeneity of the glioblastoma. In the various zones and at various development stages of the tumor, using our top-down strategy, we identified several proteins. These proteins play key roles in tumorigenesis. Particular attention was given to the necrotic area with characterization of hemorrhage, one of the most important poor prognosis factors in glioblastoma.
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12
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A critical evaluation of the current state-of-the-art in quantitative imaging mass spectrometry. Anal Bioanal Chem 2013; 406:1275-89. [DOI: 10.1007/s00216-013-7478-9] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/28/2013] [Accepted: 10/31/2013] [Indexed: 01/29/2023]
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13
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Franck J, Quanico J, Wisztorski M, Day R, Salzet M, Fournier I. Quantification-Based Mass Spectrometry Imaging of Proteins by Parafilm Assisted Microdissection. Anal Chem 2013; 85:8127-34. [DOI: 10.1021/ac4009397] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Julien Franck
- Laboratoire de Spectrométrie
de Masse Biologique Fondamentale et Appliquée-EA 4550, Université de Lille 1, Bât SN3, 1er étage, F-59655 Villeneuve D′Ascq, France
| | - Jusal Quanico
- Laboratoire de Spectrométrie
de Masse Biologique Fondamentale et Appliquée-EA 4550, Université de Lille 1, Bât SN3, 1er étage, F-59655 Villeneuve D′Ascq, France
- Institut de pharmacologie de
Sherbrooke, Département de chirurgie/service d’urologie,
Faculté de Médicine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec,
J1H 5N4, Canada
| | - Maxence Wisztorski
- Laboratoire de Spectrométrie
de Masse Biologique Fondamentale et Appliquée-EA 4550, Université de Lille 1, Bât SN3, 1er étage, F-59655 Villeneuve D′Ascq, France
| | - Robert Day
- Institut de pharmacologie de
Sherbrooke, Département de chirurgie/service d’urologie,
Faculté de Médicine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec,
J1H 5N4, Canada
| | - Michel Salzet
- Laboratoire de Spectrométrie
de Masse Biologique Fondamentale et Appliquée-EA 4550, Université de Lille 1, Bât SN3, 1er étage, F-59655 Villeneuve D′Ascq, France
| | - Isabelle Fournier
- Laboratoire de Spectrométrie
de Masse Biologique Fondamentale et Appliquée-EA 4550, Université de Lille 1, Bât SN3, 1er étage, F-59655 Villeneuve D′Ascq, France
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14
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Musshoff F, Arrey T, Strupat K. Determination of cocaine, cocaine metabolites and cannabinoids in single hairs by MALDI Fourier transform mass spectrometry - preliminary results. Drug Test Anal 2013; 5:361-5. [DOI: 10.1002/dta.1453] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/26/2012] [Accepted: 12/07/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Frank Musshoff
- Institute of Forensic Medicine; University Hospital; Stiftsplatz 12; 53111; Bonn; Germany
| | - Tabiwang Arrey
- Thermo Fisher Scientific; Hanna-Kunath-Straße 11; 28199; Bremen; Germany
| | - Kerstin Strupat
- Thermo Fisher Scientific; Hanna-Kunath-Straße 11; 28199; Bremen; Germany
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15
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16
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Abstract
Obtaining comprehensive, untargeted metabolic profiles for complex solid samples, e.g., animal tissues, requires sample preparation and access to information-rich analytical methodologies such as mass spectrometry (MS). Here we describe a practical two-step process for tissue samples that is based on extraction into 'aqueous' and 'organic' phases for polar and nonpolar metabolites. Separation methods such as ultraperformance liquid chromatography (UPLC) in combination with MS are needed to obtain sufficient resolution to create diagnostic metabolic profiles and identify candidate biomarkers. We provide detailed protocols for sample preparation, chromatographic procedures, multivariate analysis and metabolite identification via tandem MS (MS/MS) techniques and high-resolution MS. By using these optimized approaches, analysis of a set of samples using a 96-well plate format would take ~48 h: 1 h for system setup, 8-10 h for sample preparation, 34 h for UPLC-MS analysis and 2-3 h for preliminary/exploratory data processing, representing a robust method for untargeted metabolic screening of tissue samples.
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17
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Ye H, Gemperline E, Li L. A vision for better health: mass spectrometry imaging for clinical diagnostics. Clin Chim Acta 2012; 420:11-22. [PMID: 23078851 DOI: 10.1016/j.cca.2012.10.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Accepted: 10/09/2012] [Indexed: 12/13/2022]
Abstract
BACKGROUND Mass spectrometry imaging (MSI) is a powerful tool that grants the ability to investigate a broad mass range of molecules from small molecules to large proteins by creating detailed distribution maps of selected compounds. Its usefulness in biomarker discovery towards clinical applications has obtained success by correlating the molecular expression of tissues acquired from MSI with well-established histology. RESULTS To date, MSI has demonstrated its versatility in clinical applications, such as biomarker diagnostics of different diseases, prognostics of disease severities and metabolic response to drug treatment, etc. These studies have provided significant insight in clinical studies over the years and current technical advances are further facilitating the improvement of this field. Although the underlying concept is simple, factors such as choice of ionization method, sample preparation, instrumentation and data analysis must be taken into account for successful applications of MSI. Herein, we briefly reviewed these key elements yet focused on the clinical applications of MSI that cannot be addressed by other means. CONCLUSIONS Challenges and future perspectives in this field are also discussed to conclude that the ever-growing applications with continuous development of this powerful analytical tool will lead to a better understanding of the biology of diseases and improvements in clinical diagnostics.
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Affiliation(s)
- Hui Ye
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
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18
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Mass spectrometry imaging is moving toward drug protein co-localization. Trends Biotechnol 2012; 30:466-74. [DOI: 10.1016/j.tibtech.2012.05.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 05/23/2012] [Accepted: 05/24/2012] [Indexed: 12/20/2022]
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19
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Avery JL, McEwen A, Flinders B, Francese S, Clench MR. Matrix-assisted laser desorption mass spectrometry imaging for the examination of imipramine absorption by Straticell-RHE-EPI/001 an artificial model of the human epidermis. Xenobiotica 2011; 41:735-42. [DOI: 10.3109/00498254.2011.573015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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20
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Veloso A, Fernández R, Astigarraga E, Barreda-Gómez G, Manuel I, Giralt MT, Ferrer I, Ochoa B, Rodríguez-Puertas R, Fernández JA. Distribution of lipids in human brain. Anal Bioanal Chem 2011; 401:89-101. [PMID: 21437774 DOI: 10.1007/s00216-011-4882-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Revised: 02/25/2011] [Accepted: 03/07/2011] [Indexed: 11/25/2022]
Abstract
The enormous abundance of lipid molecules in the central nervous system (CNS) suggests that their role is not limited to be structural and energetic components of cells. Over the last decades, some lipids in the CNS have been identified as intracellular signalers, while others are known to act as neuromodulators of neurotransmission through binding to specific receptors. Neurotransmitters of lipidic nature, currently known as neurolipids, are synthesized during the metabolism of phospholipid precursors present in cell membranes. Therefore, the anatomical identification of each of the different lipid species in human CNS by imaging mass spectrometry (IMS), in association with other biochemical techniques with spatial resolution, can increase our knowledge on the precise metabolic routes that synthesize these neurolipids and their localization. The present study shows the lipid distribution obtained by MALDI-TOF IMS in human frontal cortex, hippocampus, and striatal area, together with functional autoradiography of cannabinoid and LPA receptors. The combined application of these methods to postmortem human brain samples may be envisioned as critical to further understand neurological diseases, in general, and particularly, the neurodegeneration that accompanies Alzheimer's disease.
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Affiliation(s)
- Antonio Veloso
- Department of Chemical Physics, Faculty of Science and Technology, University of the Basque Country, Leioa, Spain
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Matrix-assisted laser desorption ionization imaging mass spectrometry in lipidomics. Anal Bioanal Chem 2011; 401:29-51. [DOI: 10.1007/s00216-011-4696-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 12/29/2010] [Accepted: 01/17/2011] [Indexed: 12/12/2022]
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Anderson DMG, Carolan VA, Crosland S, Sharples KR, Clench MR. Examination of the translocation of sulfonylurea herbicides in sunflower plants by matrix-assisted laser desorption/ionisation mass spectrometry imaging. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2010; 24:3309-3319. [PMID: 20973006 DOI: 10.1002/rcm.4767] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Pesticides are widely used in agriculture to control weeds, pests and diseases. Successful control is dependent on the compound reaching the target site within the organism after spray or soil application. Conventional methods for determining uptake and movement of herbicides and pesticides include autoradiography, liquid scintillation and chromatographic techniques such as high-performance liquid chromatography (HPLC). Autoradiography using radiolabelled compounds provides the best indication of a compound's movement within the plant system. Autoradiography is an established technique but it relies on the synthesis of radiolabelled compounds. The distribution of four sulfonylurea herbicides in sunflower plants has been studied 24 h after foliar application. The use of matrix-assisted laser desorption/ionisation mass spectrometry imaging (MALDI-MSI) images of protonated molecules and fragment ions (resulting from fragmentation at the urea bond within the sulfonylurea herbicides) has provided evidence for translocation above and below the application point. The translocation of nicosulfuron and azoxystrobin within the same plant system has also been demonstrated following their application to the plant stem. This study provides evidence that MALDI-MSI has great potential as an analytical technique to detect and assess the foliar, root and stem uptake of agrochemicals, and to reveal their distribution through the plant once absorbed and translocated.
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Affiliation(s)
- David M G Anderson
- Biomedical Research Centre, Sheffield Hallam University, Howard Street, Sheffield S1 1WB, UK
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