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Nagano E, Odake K, Shimma S. Tissue derivatization for visualizing lactate and pyruvate in mouse testis tissues using matrix-assisted laser desorption/ionization-mass spectrometry imaging. Anal Bioanal Chem 2024:10.1007/s00216-024-05559-4. [PMID: 39379620 DOI: 10.1007/s00216-024-05559-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 08/27/2024] [Accepted: 09/18/2024] [Indexed: 10/10/2024]
Abstract
Pyruvate and lactate are the final metabolites of the glycolytic system that are formed under oxygen-rich and anaerobic conditions, respectively. They play an important role in energy metabolism. Obtaining a tissue distribution image of pyruvate and lactate holds great significance in molecular biology because the glycolytic system plays an essential role in diseases, such as tumors and diabetes; microbial activities, such as alcohol production and lactic acid fermentation; and maintaining homeostasis in the gut environment. However, it is difficult to obtain images of the distribution of in vivo metabolites because of the low detection sensitivities of current methods. In this study, a novel derivatization method for pyruvate and lactate was developed using matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) to detect pyruvate and lactate in vivo and obtain biodistribution images. We investigated derivatization methods using readily available 3-nitrophenylhydrazine (3NPH), the addition of which improves the sensitivity of pyruvate detection, and the distribution of pyruvate in mouse testes was successfully visualized. Furthermore, the distribution of lactate in the mouse testes could be visualized, and improved detection sensitivity for the main metabolites of the tricarboxylic acid cycle was demonstrated. This derivatization method can be used to detect carboxyl-containing metabolites, including pyruvate, via MALDI-MSI. Furthermore, 3NPH forms amide bonds with carbonyl, phosphate, and carboxyl groups, suggesting the possibility of visualizing its distribution in many metabolites.
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Affiliation(s)
- Erika Nagano
- Miruion inc, 7-7-20Asagi, Saito, Suita, Osaka, 5670085, Japan
| | - Kazuki Odake
- Miruion inc, 7-7-20Asagi, Saito, Suita, Osaka, 5670085, Japan
| | - Shuichi Shimma
- Miruion inc, 7-7-20Asagi, Saito, Suita, Osaka, 5670085, Japan.
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan.
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, Japan.
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2
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Nagano E, Odake K, Akiyoshi T, Shimma S. Development of a Mass Spectrometry Imaging Method to Evaluate the Penetration of Moisturizing Components Coated on Surgical Gloves into Artificial Membranes. Mass Spectrom (Tokyo) 2024; 13:A0145. [PMID: 38577169 PMCID: PMC10990723 DOI: 10.5702/massspectrometry.a0145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 03/06/2024] [Indexed: 04/06/2024] Open
Abstract
Skin dryness and irritant contact dermatitis induced by the prolonged use of surgical gloves are issues faced by physicians. To address these concerns, manufacturers have introduced surgical gloves that incorporate a moisturizing component on their inner surface, resulting in documented results showing a reduction in hand dermatitis. However, the spatial distribution of moisturizers applied to surgical gloves within the integument remains unclear. Using matrix-assisted laser desorption/ionization (MALDI)-mass spectrometry imaging (MSI), we investigated the spatial distribution of moisturizers in surgical gloves within artificial membranes. Recently, dermal permeation assessments using three-dimensional models, silicone membranes, and Strat-M have gained attention as alternative approaches to animal testing. Therefore, in this study, we established an in vitro dermal permeation assessment of commercially available moisturizers in surgical gloves using artificial membranes. In this study, we offer a methodology to visualize the infiltration of moisturizers applied to surgical gloves into an artificial membrane using MALDI-MSI, while evaluating commercially available moisturizer-coated surgical gloves. Using our penetration evaluation method, we confirmed the infiltration of the moisturizers into the polyethersulfone 2 and polyolefin layers, which correspond to the epidermis and dermis of the skin, after the use of surgical gloves. The MSI-based method presented herein demonstrated the efficacy of evaluating the permeation of samples containing active ingredients.
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Affiliation(s)
- Erika Nagano
- Research and Development Department, Miruion Corporation, Ibaraki, Osaka 567–0085, Japan
| | - Kazuki Odake
- Research and Development Department, Miruion Corporation, Ibaraki, Osaka 567–0085, Japan
| | - Toru Akiyoshi
- Marketing Department, Cardinal Health K.K., Tokyo 163–1035, Japan
| | - Shuichi Shimma
- Research and Development Department, Miruion Corporation, Ibaraki, Osaka 567–0085, Japan
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Osaka 565–0871, Japan
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka 565–0871, Japan
- Osaka University Shimadzu Omics Innovation Research Laboratory, Osaka University, Osaka 565–0871, Japan
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3
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Müller WH, Verdin A, De Pauw E, Malherbe C, Eppe G. Surface-assisted laser desorption/ionization mass spectrometry imaging: A review. MASS SPECTROMETRY REVIEWS 2022; 41:373-420. [PMID: 33174287 PMCID: PMC9292874 DOI: 10.1002/mas.21670] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/22/2020] [Accepted: 10/24/2020] [Indexed: 05/04/2023]
Abstract
In the last decades, surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) has attracted increasing interest due to its unique capabilities, achievable through the nanostructured substrates used to promote the analyte desorption/ionization. While the most widely recognized asset of SALDI-MS is the untargeted analysis of small molecules, this technique also offers the possibility of targeted approaches. In particular, the implementation of SALDI-MS imaging (SALDI-MSI), which is the focus of this review, opens up new opportunities. After a brief discussion of the nomenclature and the fundamental mechanisms associated with this technique, which are still highly controversial, the analytical strategies to perform SALDI-MSI are extensively discussed. Emphasis is placed on the sample preparation but also on the selection of the nanosubstrate (in terms of chemical composition and morphology) as well as its functionalization possibilities for the selective analysis of specific compounds in targeted approaches. Subsequently, some selected applications of SALDI-MSI in various fields (i.e., biomedical, biological, environmental, and forensic) are presented. The strengths and the remaining limitations of SALDI-MSI are finally summarized in the conclusion and some perspectives of this technique, which has a bright future, are proposed in this section.
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Affiliation(s)
- Wendy H. Müller
- Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry DepartmentUniversity of LiègeLiègeBelgium
| | - Alexandre Verdin
- Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry DepartmentUniversity of LiègeLiègeBelgium
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry DepartmentUniversity of LiègeLiègeBelgium
| | - Cedric Malherbe
- Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry DepartmentUniversity of LiègeLiègeBelgium
| | - Gauthier Eppe
- Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry DepartmentUniversity of LiègeLiègeBelgium
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4
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Huang H, Ouyang D, Lin ZA. Recent Advances in Surface-Assisted Laser Desorption/Ionization Mass Spectrometry and Its Imaging for Small Molecules. JOURNAL OF ANALYSIS AND TESTING 2022. [DOI: 10.1007/s41664-022-00211-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ruiz-Pastor MJ, Kutsyr O, Lax P, Cuenca N. Decrease in DHA and other fatty acids correlates with photoreceptor degeneration in retinitis pigmentosa. Exp Eye Res 2021; 209:108667. [PMID: 34119484 DOI: 10.1016/j.exer.2021.108667] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/21/2021] [Accepted: 06/07/2021] [Indexed: 10/21/2022]
Abstract
Fatty acids, and especially docosahexaenoic acid (DHA), are essential for photoreceptor cell integrity and are involved in the phototransduction cascade. In this study, we analyzed the changes in the fatty acid profile in the retina of the rd10 mouse, model of retinitis pigmentosa, in order to identify potential risk factors for retinal degeneration and possible therapeutic approaches. Fatty acids from C57BL/6J and rd10 mouse retinas were extracted with Folch's method and analyzed by gas chromatography/mass spectrometry. Changes in retinal morphology were evaluated by immunohistochemistry. The rd10 mouse retina showed a decreased number of photoreceptor rows and alterations in photoreceptor morphology compared to C57BL/6J mice. The total amount of fatty acids dropped by 29.4% in the dystrophic retinas compared to C57BL/6J retinas. A positive correlation was found between the retinal content of specific fatty acids and the number of photoreceptor rows. We found that the amount of several short-chain and long-chain saturated fatty acids, as well as monounsaturated fatty acids, decreased in the retina of rd10 mice. Moreover, the content of the n-6 polyunsaturated fatty acid arachidonic acid and the n-3 polyunsaturated DHA decreased markedly in the dystrophic retina. The fall of DHA was more pronounced, hence the n-6/n-3 ratio was significantly increased in the diseased retina. The content of specific fatty acids in the retina decreased with photoreceptor degeneration in retinitis pigmentosa mice, with a remarkable reduction in DHA and other saturated and unsaturated fatty acids. These fatty acids could be essential for photoreceptor cell viability, and they should be evaluated for the design of therapeutical strategies and nutritional supplements.
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Affiliation(s)
- María José Ruiz-Pastor
- Department of Physiology, Genetics, and Microbiology, University of Alicante, Alicante, Spain
| | - Oksana Kutsyr
- Department of Physiology, Genetics, and Microbiology, University of Alicante, Alicante, Spain
| | - Pedro Lax
- Department of Physiology, Genetics, and Microbiology, University of Alicante, Alicante, Spain.
| | - Nicolás Cuenca
- Department of Physiology, Genetics, and Microbiology, University of Alicante, Alicante, Spain.
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Chen C, Laviolette SR, Whitehead SN, Renaud JB, Yeung KKC. Imaging of Neurotransmitters and Small Molecules in Brain Tissues Using Laser Desorption/Ionization Mass Spectrometry Assisted with Zinc Oxide Nanoparticles. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:1065-1079. [PMID: 33783203 DOI: 10.1021/jasms.1c00021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Inorganic nanostructured materials such as silicon, carbon, metals, and metal oxides have been explored as matrices of low-background signals to assist the laser desorption/ionization (LDI) mass spectrometric (MS) analysis of small molecules, but their applications for imaging of small molecules in biological tissues remain limited in the literature. Titanium dioxide is one of the known nanoparticles (NP) that can effectively assist LDI MS imaging of low molecular weight molecules (LMWM). TiO2 NP is commercially available as dispersions, which can be applied using a chemical solution sprayer. However, aggregation of NP can occur in the dispersions, and the aggregated NP can slowly clog the sprayer nozzle. In this work, the use of zinc oxide (ZnO) NP for LDI MS imaging is investigated as a superior alternative due to its dissolution in acidic pH. ZnO NP was found to deliver similar or better results in the imaging of LMWM in comparison to TiO2 NP. The regular acid washes were effective in minimizing clogging and maintaining high reproducibility. High-quality images of mouse sagittal and rat coronal tissue sections were obtained. Ions were detected predominately as Na+ or K+ adducts in the positive ion mode. The number of LMWM detected with ZnO NP was similar to that obtained with TiO2 NP, and only a small degree of specificity was observed.
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Affiliation(s)
| | | | | | - Justin B Renaud
- London Research and Development Center, Agriculture and Agri-Food Canada, London, ON N5 V 4T3, Canada
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Schnepf A, Yappert MC, Borchman D. In-vitro and ex-situ regional mass spectral analysis of phospholipids and glucose in the vitreous humor from diabetic and non-diabetic human donors. Exp Eye Res 2020; 200:108221. [PMID: 32919990 DOI: 10.1016/j.exer.2020.108221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/26/2020] [Accepted: 09/03/2020] [Indexed: 11/15/2022]
Abstract
The causes of vitreous humor (VH) liquefaction remain unclear. Diabetes accelerates this process and other ocular diseases. The weakening of the blood-retina barrier observed with diabetes could enhance the rate of transfer of relatively small molecules such as glucose (Glu) and phospholipids (PLs) from the retina to the VH. Glucose and PLs have been detected previously in VH but their regional distributions are not known. The mapping of Glu and PLs in VHs from subjects with and without diabetes could reveal the roles of these molecules in VH liquefaction. Diabetic and non-diabetic human eyes were acquired from the Kentucky Lions Eye Bank and frozen immediately. Each VH was removed and halved along the sagittal plane. One half was stamped on a matrix assisted laser desorption ionization (MALDI) plate. Either p-Nitroanaline (26 mg/mL MeOH:CHCl3) or 2,5-dihydroxybenzoic acid (20 mg/mL H2O:acetonitrile) was used as matrix. Glu and PLs were extracted from the remaining sections and analyzed. Data were acquired using a MALDI-mass spectrometer. The levels of Glu and PLs were significantly greater in VH from diabetics (VHd) compared with VH from non-diabetics (VHnd). VHds showed the highest relative levels of PLs in the posterior VH, followed by the anterior and central regions. Throughout the entire VH, the most abundant PLs were phosphatidylcholines followed by sphingomyelins. For Glu, the relative intensities were ~3 times higher in the posterior region of VHd (12 ± 1.3) compared with VHnd (6.5 ± 0.7) VHs. Regional studies showed that relative to the posterior VHd, the Glu levels were lower in the anterior (8.1 ± 1.0) and central (6.7 ± 0.8) regions. For the VHnds, the values for the central and anterior regions were 5.9 ± 1.2 and 4.7 ± 0.9, respectively. PLs and Glu are most abundant in the posterior region relative to the central and anterior zones of VHs. This trend was observed in VHd and VHnd, but PLs and Glu levels were significantly higher in VHds. These results support the possibility that higher levels of Glu and PLs accelerate VH liquefaction in diabetic patients. As liquefaction begins in the posterior region, the higher abundance of PLs and Glu in this zone also suggests that they may play a role in liquefaction. The specific molecular interactions affected by Glu and PLs in the collagen/hyaluronan/water network need to be examined.
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Affiliation(s)
- Abigail Schnepf
- Department of Chemistry, University of Louisville, Louisville, KY, USA.
| | | | - Douglas Borchman
- Department of Ophthalmology and Visual Sciences, University of Louisville, Louisville, KY, USA
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8
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Samarah LZ, Vertes A. Mass spectrometry imaging based on laser desorption ionization from inorganic and nanophotonic platforms. VIEW 2020. [DOI: 10.1002/viw.20200063] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Laith Z. Samarah
- Department of Chemistry George Washington University Washington DC USA
| | - Akos Vertes
- Department of Chemistry George Washington University Washington DC USA
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Abstract
Mass spectrometry (MS) is an ideal tool for analyzing multiple types of (bio)molecular information simultaneously in complex biological systems. In addition, MS provides structural information on targets, and can easily discriminate between true analytes and background. Therefore, imaging mass spectrometry (IMS) enables not only visualization of tissues to give positional information on targets but also allows for molecular analysis of targets by affording the molecular weights. Matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) MS is particularly effective and is generally used for IMS. However, the requirement for an organic matrix raises several limitations that get in the way of accurate and reliable images and hampers imaging of small molecules such as drugs and their metabolites. To overcome these problems, various organic matrix-free LDI IMS systems have been developed, mostly utilizing nanostructured surfaces and inorganic nanoparticles as an alternative to the organic matrix. This minireview highlights and focuses on the progress in organic matrix-free LDI IMS and briefly discusses the use of other IMS techniques such as desorption electrospray ionization, laser ablation electrospray ionization, and secondary ion mass spectrometry.
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Affiliation(s)
- Eunjin Kim
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea
| | - Jisu Kim
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea
| | - Inseong Choi
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea
| | - Jeongwook Lee
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea
| | - Woon-Seok Yeo
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea
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Nakashima Y, Eto F, Ishihara K, Yamazaki F, Sato S, Sakurai T, Kahyo T, Setou M. Development of sheet-enhanced technique (Set) method for matrix-assisted laser desorption/ionization imaging mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8703. [PMID: 31840282 DOI: 10.1002/rcm.8703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 12/03/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE The key to successful experiments in matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) is to apply the matrix uniformly to the sample. With the development of automated equipment, uniform matrix application has made great progress while the sample preparation required to acquire a better image becomes complicated. METHODS The approach is to apply the matrix uniformly to tape and adhere it to the tissue section. We call this the sheet-enhanced technique (Set) method. RESULTS The Set method promotes ionization of biomolecules as well as the spray method. This procedure does not require the preparation and application of a matrix solution for each experiment, dramatically reducing the time and effort of matrix deposition. CONCLUSIONS In the present study, we have developed the Set method as a new matrix application method. The method promotes ionization of biomolecules as well as the spray method for MALDI-IMS.
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Affiliation(s)
- Yuko Nakashima
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Fumihiro Eto
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Kazuku Ishihara
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Fumiyoshi Yamazaki
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Shumpei Sato
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Takanobu Sakurai
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Tomoaki Kahyo
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Mitsutoshi Setou
- Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- International Mass Imaging Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- Department of Systems Molecular Anatomy, Institute for Medical Photonics Research, Preeminent Medical Photonics Education & Research Center, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
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Yang E, Fournelle F, Chaurand P. Silver spray deposition for AgLDI imaging MS of cholesterol and other olefins on thin tissue sections. JOURNAL OF MASS SPECTROMETRY : JMS 2020; 55:e4428. [PMID: 31410898 DOI: 10.1002/jms.4428] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 07/26/2019] [Accepted: 08/05/2019] [Indexed: 06/10/2023]
Abstract
Olefins such as cholesterol and unsaturated fatty acids play important biological roles. Silver-assisted laser desorption ionization (AgLDI) takes advantage of the strong affinity of silver to conjugate with double bonds to selectively ionize these molecules for imaging mass spectrometry (IMS) experiments. For IMS studies, two main approaches for silver deposition have been described in the literature: fine coating by silver sputtering and spray deposition of silver nanoparticles. While these approaches allow for extremely high resolution IMS experiments to be conducted, they are not readily available to all laboratories. Herein, we present a silver nitrate spray deposition approach as an alternative to silver sputtering and nanoparticle deposition for routine IMS analysis. The silver nitrate spray has the same level of specificity and sensitivity for olefins, particularly cholesterol, and has shown to be capable of IMS experiments down to 10-μm spatial resolution. Minimal sample preparation and the affordability of silver nitrate make this a convenient and accessible technique worth considering.
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Affiliation(s)
- Ethan Yang
- Department of Chemistry, University of Montreal, Montreal, Quebec, Canada, H3C 3J7
| | - Frédéric Fournelle
- Department of Chemistry, University of Montreal, Montreal, Quebec, Canada, H3C 3J7
| | - Pierre Chaurand
- Department of Chemistry, University of Montreal, Montreal, Quebec, Canada, H3C 3J7
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12
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Gas-aggregated Ag nanoparticles for detection of small molecules using LDI MS. Anal Bioanal Chem 2019; 412:1037-1047. [DOI: 10.1007/s00216-019-02329-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/30/2019] [Accepted: 12/04/2019] [Indexed: 01/04/2023]
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13
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Nanoparticle-based surface assisted laser desorption ionization mass spectrometry: a review. Mikrochim Acta 2019; 186:682. [DOI: 10.1007/s00604-019-3770-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 08/16/2019] [Indexed: 12/28/2022]
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Sato T, Horikawa M, Takei S, Yamazaki F, Ito TK, Kondo T, Sakurai T, Kahyo T, Ikegami K, Sato S, Sato R, Jinno Y, Kawano H, Naoe S, Arita M, Kashiwagi Y, Setou M. Preferential Incorporation of Administered Eicosapentaenoic Acid Into Thin-Cap Atherosclerotic Plaques. Arterioscler Thromb Vasc Biol 2019; 39:1802-1816. [PMID: 31366219 DOI: 10.1161/atvbaha.119.313093] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVE n-3 polyunsaturated fatty acids, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), have beneficial effects on atherosclerosis. Although specific salutary actions have been reported, the detailed distribution of n-3 polyunsaturated fatty acids in plaque and their relevance in disease progression are unclear. Our aim was to assess the pharmacodynamics of EPA and DHA and their metabolites in atherosclerotic plaques. Approach and Results: Apolipoprotein E-deficient (Apoe-/-) mice were fed a Western diet supplemented with EPA (1%, w/w) or DHA (1%, w/w) for 3 weeks. Imaging mass spectrometry analyses were performed in the aortic root and arch of the Apoe-/- mice to evaluate the distribution of EPA, DHA, their metabolites and the lipids containing EPA or DHA in the plaques. Liquid chromatography-mass spectrometry and histological analysis were also performed. The intima-media thickness of atherosclerotic plaque decreased in plaques containing free EPA and EPAs attached with several lipids. EPA was distributed more densely in the thin-cap plaques than in the thick-cap plaques, while DHA was more evenly distributed. In the aortic root, the distribution of total EPA level and cholesteryl esters containing EPA followed a concentration gradient from the vascular endothelium to the media. In the aortic arch, free EPA and 12-hydroxy-EPA colocalized with M2 macrophage. CONCLUSIONS Administered EPA tends to be incorporated from the vascular lumen side and preferentially taken into the thin-cap plaque.
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Affiliation(s)
- Tomohito Sato
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,First Department of Surgery (T. Sato), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Makoto Horikawa
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Shiro Takei
- Department of Environmental Biology, College of Bioscience and Biotechnology, Chubu University, Aichi, Japan (S.T.)
| | - Fumiyoshi Yamazaki
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Takashi K Ito
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Takeshi Kondo
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Takanobu Sakurai
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Tomoaki Kahyo
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Koji Ikegami
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Shumpei Sato
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Ryota Sato
- Division of Cardiology, Internal Medicine 3 (R.S.), Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Yasutaka Jinno
- Development Research, Pharmaceutical Research Center, Mochida Pharmaceutical Co, Ltd, Shizuoka, Japan (Y.J., H.K., S.N.)
| | - Hiroyuki Kawano
- Development Research, Pharmaceutical Research Center, Mochida Pharmaceutical Co, Ltd, Shizuoka, Japan (Y.J., H.K., S.N.)
| | - Satoko Naoe
- Development Research, Pharmaceutical Research Center, Mochida Pharmaceutical Co, Ltd, Shizuoka, Japan (Y.J., H.K., S.N.).,Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Kanagawa, Japan (S.N., M.A.)
| | - Makoto Arita
- Preeminent Medical Photonics Education and Research Center, Shizuoka, Japan (M.S.)
| | - Yukiyasu Kashiwagi
- Osaka Research Institute of Industrial Science and Technology, Japan (Y.K., )
| | - Mitsutoshi Setou
- From the Department of Cellular and Molecular Anatomy (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,International Mass Imaging Center (T. Sato, M.H., F.Y., T.K.I., T. Kondo, T. Sakurai, T. Kahyo, K.I., S.S., M.S.), Hamamatsu University School of Medicine, Shizuoka, Japan.,Department of Anatomy, The University of Hong Kong, China (M.S.)
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15
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Nozaki K, Nakabayashi Y, Murakami T, Miyazato A, Osaka I. Novel approach to enhance sensitivity in surface-assisted laser desorption/ionization mass spectrometry imaging using deposited organic-inorganic hybrid matrices. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:612-619. [PMID: 31070274 DOI: 10.1002/jms.4370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/16/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
Sample pretreatment is key to obtaining good data in matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). Although sublimation is one of the best methods for obtaining homogenously fine organic matrix crystals, its sensitivity can be low due to the lack of a solvent extraction effect. We investigated the effect of incorporating a thin film of metal formed by zirconium (Zr) sputtering into the sublimation process for MALDI matrix deposition for improving the detection sensitivity in mouse liver tissue sections treated with olanzapine. The matrix-enhanced surface-assisted laser desorption/ionization (ME-SALDI) method, where a matrix was formed by sputtering Zr to form a thin nanoparticle layer before depositing MALDI organic matrix comprising α-cyano-4-hydroxycinnamic acid (CHCA) by sublimation, resulted in a significant improvement in sensitivity, with the ion intensity of olanzapine being about 1800 times that observed using the MALDI method, comprising CHCA sublimation alone. When Zr sputtering was performed after CHCA deposition, however, no such enhancement in sensitivity was observed. The enhanced sensitivity due to Zr sputtering was also observed when the CHCA solution was applied by spraying, being about twice as high as that observed by CHCA spraying alone. In addition, the detection sensitivity of these various pretreatment methods was similar for endogenous glutathione. Given that sample preparation using the ME-SALDI-MSI method, which combines Zr sputtering with the sublimation method for depositing an organic matrix, does not involve a solvent, delocalization problems such as migration of analytes observed after matrix spraying and washing with aqueous solutions as sample pretreatment are not expected. Therefore, ME-Zr-SALDI-MSI is a novel sample pretreatment method that can improve the sensitivity of analytes while maintaining high spatial resolution in MALDI-MSI.
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Affiliation(s)
- Kazuyoshi Nozaki
- Bioimaging, Analysis & Pharmacokinetics Research Labs. Drug Discovery research, Astellas Pharma Inc, 21 Miyukigaoka, Tsukuba-shi, Ibaraki, 305-8585, Japan
| | - Yuji Nakabayashi
- Center for Nano Material and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Tatsuya Murakami
- Center for Nano Material and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Akio Miyazato
- Center for Nano Material and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Issey Osaka
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu-City, Toyama, 939-0398, Japan
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16
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Ràfols P, Vilalta D, Torres S, Calavia R, Heijs B, McDonnell LA, Brezmes J, del Castillo E, Yanes O, Ramírez N, Correig X. Assessing the potential of sputtered gold nanolayers in mass spectrometry imaging for metabolomics applications. PLoS One 2018; 13:e0208908. [PMID: 30540827 PMCID: PMC6291137 DOI: 10.1371/journal.pone.0208908] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 11/26/2018] [Indexed: 12/20/2022] Open
Abstract
Mass spectrometry imaging (MSI) is a molecular imaging technique that maps the distribution of molecules in biological tissues with high spatial resolution. The most widely used MSI modality is matrix-assisted laser desorption/ionization (MALDI), mainly due to the large variety of analyte classes amenable for MALDI analysis. However, the organic matrices used in classical MALDI may impact the quality of the molecular images due to limited lateral resolution and strong background noise in the low mass range, hindering its use in metabolomics. Here we present a matrix-free laser desorption/ionization (LDI) technique based on the deposition of gold nanolayers on tissue sections by means of sputter-coating. This gold coating method is quick, fully automated, reproducible, and allows growing highly controlled gold nanolayers, necessary for high quality and high resolution MS image acquisition. The performance of the developed method has been tested through the acquisition of MS images of brain tissues. The obtained spectra showed a high number of MS peaks in the low mass region (m/z below 1000 Da) with few background peaks, demonstrating the ability of the sputtered gold nanolayers of promoting the desorption/ionization of a wide range of metabolites. These results, together with the reliable MS spectrum calibration using gold peaks, make the developed method a valuable alternative for MSI applications.
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Affiliation(s)
- Pere Ràfols
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
- * E-mail: (PR); (NR)
| | - Dídac Vilalta
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
| | - Sònia Torres
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
| | - Raul Calavia
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
| | - Bram Heijs
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Liam A. McDonnell
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
- Department of Pathology, Leiden University Medical Center, Leiden The Netherlands
- Fondazione Pisana per la Scienza ONLUS, Pisa, Italy
| | - Jesús Brezmes
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
| | - Esteban del Castillo
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
| | - Oscar Yanes
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
| | - Noelia Ramírez
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
- Institut d’Investigació Sanitària Pere Virgili, Tarragona, Spain
- * E-mail: (PR); (NR)
| | - Xavier Correig
- Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
- Institut d’Investigació Sanitària Pere Virgili, Tarragona, Spain
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17
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Ding F, Qian Y, Deng Z, Zhang J, Zhou Y, Yang L, Wang F, Wang J, Zhou Z, Shen J. Size-selected silver nanoparticles for MALDI-TOF mass spectrometry of amyloid-beta peptides. NANOSCALE 2018; 10:22044-22054. [PMID: 30452045 DOI: 10.1039/c8nr07921h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is one of the most efficient mass spectrometric techniques for the analysis of high-molecular-weight compounds with superior selectivity and sensitivity. Common MALDI matrices are low molecular weight (LMW) organics and will therefore produce a large amount of matrix-related ion peaks, which limits the use of MALDI-MS for the detection of LMW molecules. A major breakthrough of this limitation was made by the introduction of surface assisted desorption/ionization techniques, with graphite particles firstly as the matrix, followed by expansion into other types of nanoparticles or nanostructures. However, previous studies failed to address well the optimum size and concentration of Ag NPs to be used as the MALDI matrix. In this study, to explore and compare the efficiency of different sized silver nanoparticles (Ag NPs) as the MALDI matrix for the detection of LMW molecules, three different sized Ag NPs (2.8 ± 1.0, 12.8 ± 3.2 and 44.2 ± 5.0 nm) have been successfully developed as the MALDI time-of-flight MS (MALDI-TOF MS) matrix and amyloid-beta (Aβ) peptides, crucially involved in Alzheimer's disease and a variety of cancers, were chosen as an example of LMW molecules in our MALDI-TOF MS analysis with Ag NPs as matrices. The results showed size-selected MS signals with the smallest (2.8 ± 1.0 nm) Ag NP matrix producing the highest spectral intensities, when compared with other larger sized Ag NP matrices and conventional matrices such as SA and DHB. Furthermore, the optimal concentrations for different sized Ag NPs as matrices were determined as follows: 0.125 nM (2.8 ± 1.0 nm Ag NPs), 0.0625 nM (12.8 ± 3.2 nm Ag NPs), and 0.03125 nM (44.2 ± 5.0 nm Ag NPs), respectively. These results not only corroborated that Ag NPs could act as a very suitable matrix to assist in the desorption/ionization of LMW molecules but also revealed size-selected mass spectrometry signals with smaller Ag NPs as the MALDI matrix bearing more advantages than their larger counterparts. These novel findings paved the way for wider applications of MALDI-MS using Ag NPs as matrices for the analysis of LMW molecules.
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Affiliation(s)
- Feng Ding
- Department of Microbiology & Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P. R. China.
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18
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Sacks CD, Stumpo KA. Gold nanoparticles for enhanced ionization and fragmentation of biomolecules using LDI-MS. JOURNAL OF MASS SPECTROMETRY : JMS 2018; 53:1070-1077. [PMID: 30107051 DOI: 10.1002/jms.4282] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 08/03/2018] [Accepted: 08/07/2018] [Indexed: 06/08/2023]
Abstract
New applications for gold nanoparticles (AuNPs) in laser desorption ionization mass spectrometry are presented here. This work expands on previous biomolecule studies and introduces carbohydrates, steroids, bile acids, and other small molecules as a focus. Broad trends in ionization are observed, and specifically of interest are new species that have not previously been reported from AuNPs (e.g., [M + Au]+ ). Interesting fragmentation effects have been observed for diphenhydramine, including similarity to electron impact mass spectra and possible radical driven reactions, providing insight into the mechanism of ionization when using AuNPs.
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Affiliation(s)
- Cody D Sacks
- Department of Chemistry, University of Scranton, Scranton, PA, 18510, USA
| | - Katherine A Stumpo
- Department of Chemistry, University of Scranton, Scranton, PA, 18510, USA
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19
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Nakashima Y, Setou M. Distribution of Antisense Oligonucleotides in Rat Eyeballs Using MALDI Imaging Mass Spectrometry. Mass Spectrom (Tokyo) 2018; 7:A0070. [PMID: 30214850 PMCID: PMC6131115 DOI: 10.5702/massspectrometry.a0070] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 07/31/2018] [Indexed: 12/17/2022] Open
Abstract
Oligonucleotide-based therapeutics such as antisense oligonucleotides, small interfering RNAs (siRNAs), decoy and aptamer have been extensively developed. To investigate the pharmacokinetics of oligonucleotide therapeutics, it is common to label a radioisotope in a nucleic acid and visualize it. However, if the labeled terminal nucleotide is decomposed by a nuclease in vivo, only the labeled nucleotide is detected, and it is impossible to observe the nucleic acid exhibiting the drug effect. The distribution of biomolecules, such as phospholipids, proteins, and glycolipids, can be obtained and visualized without labeling using matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS). MALDI-IMS is also used in pharmacokinetic analysis to visualize a parent drug and its metabolites simultaneously. In this study, we reported a methodology for oligonucleotides analysis by MALDI-IMS. When phosphorothioate antisense oligonucleotide was administered into the eyeball of rats, it reached the retina after 30 min without undergoing decomposition by nucleases.
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Affiliation(s)
- Yuko Nakashima
- International Mass Imaging Center and Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, Japan
| | - Mitsutoshi Setou
- International Mass Imaging Center and Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, Japan
- Preeminent Medical Photonics Education & Research Center, Japan
- Department of Anatomy, The University of Hong Kong, China
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20
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Sato K, Saigusa D, Saito R, Fujioka A, Nakagawa Y, Nishiguchi KM, Kokubun T, Motoike IN, Maruyama K, Omodaka K, Shiga Y, Uruno A, Koshiba S, Yamamoto M, Nakazawa T. Metabolomic changes in the mouse retina after optic nerve injury. Sci Rep 2018; 8:11930. [PMID: 30093719 PMCID: PMC6085332 DOI: 10.1038/s41598-018-30464-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 07/20/2018] [Indexed: 12/12/2022] Open
Abstract
In glaucoma, although axonal injury drives retinal ganglion cell (RGC) death, little is known about the underlying pathomechanisms. To provide new mechanistic insights and identify new biomarkers, we combined latest non-targeting metabolomics analyses to profile altered metabolites in the mouse whole retina 2, 4, and 7 days after optic nerve crush (NC). Ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry and liquid chromatography Fourier transform mass spectrometry covering wide spectrum of metabolites in combination highlighted 30 metabolites that changed its concentration after NC. The analysis displayed similar changes for purine nucleotide and glutathione as reported previously in another animal model of axonal injury and detected multiple metabolites that increased after the injury. After studying the specificity of the identified metabolites to RGCs in histological sections using imaging mass spectrometry, two metabolites, i.e., L-acetylcarnitine and phosphatidylcholine were increased not only preceding the peak of RGC death in the whole retina but also at the RGC layer (2.3-fold and 1.2-fold, respectively). These phospholipids propose novel mechanisms of RGC death and may serve as early biomarkers of axonal injury. The combinatory metabolomics analyses promise to illuminate pathomechanisms, reveal biomarkers, and allow the discovery of new therapeutic targets of glaucoma.
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Affiliation(s)
- Kota Sato
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.,Department of Ophthalmic imaging and information analytics, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Daisuke Saigusa
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Medical Biochemistry, Tohoku University School of Medicine, Sendai, Miyagi, Japan.,LEAP, Japan Agency for Medical Research and Development (AMED), Chiyoda, Tokyo, Japan
| | - Ritsumi Saito
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Medical Biochemistry, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Amane Fujioka
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Yurika Nakagawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Koji M Nishiguchi
- Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Taiki Kokubun
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Ikuko N Motoike
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Department of Systems Bioinformatics, Graduate School of Information Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Kazuichi Maruyama
- Department of Innovative Visual Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kazuko Omodaka
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.,Department of Ophthalmic imaging and information analytics, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Yukihiro Shiga
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Akira Uruno
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Medical Biochemistry, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Seizo Koshiba
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Medical Biochemistry, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Masayuki Yamamoto
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, Japan.,Medical Biochemistry, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Toru Nakazawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan. .,Department of Ophthalmic imaging and information analytics, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan. .,Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan. .,Department of Retinal Disease Control, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
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21
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Shibasaki Y, Horikawa M, Ikegami K, Kiuchi R, Takeda M, Hiraide T, Morita Y, Konno H, Takeuchi H, Setou M, Sakaguchi T. Stearate-to-palmitate ratio modulates endoplasmic reticulum stress and cell apoptosis in non-B non-C hepatoma cells. Cancer Sci 2018; 109:1110-1120. [PMID: 29427339 PMCID: PMC5891190 DOI: 10.1111/cas.13529] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/25/2018] [Accepted: 02/02/2018] [Indexed: 12/29/2022] Open
Abstract
The increased prevalence of hepatocellular carcinoma (HCC) without viral infection, namely, NHCC, is a major public health issue worldwide. NHCC is frequently derived from non‐alcoholic fatty liver (NAFL) and non‐alcoholic steatohepatitis, which exhibit dysregulated fatty acid (FA) metabolism. This raises the possibility that NHCC evolves intracellular machineries to adapt to dysregulated FA metabolism. We herein aim to identify NHCC‐specifically altered FA and key molecules to achieve the adaptation. To analyze FA, imaging mass spectrometry (IMS) was performed on 15 HCC specimens. The composition of saturated FA (SFA) in NHCC was altered from that in typical HCC. The stearate‐to‐palmitate ratio (SPR) was significantly increased in NHCC. Associated with the SPR increase, the ELOVL6 protein level was upregulated in NHCC. The knockdown of ELOVL6 reduced SPR, and enhanced endoplasmic reticulum stress, inducing apoptosis of Huh7 and HepG2 cells. In conclusion, NHCC appears to adapt to an FA‐rich environment by modulating SPR through ELOVL6.
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Affiliation(s)
- Yasushi Shibasaki
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Makoto Horikawa
- Department of Cellular & Molecular Anatomy, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.,International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Koji Ikegami
- Department of Cellular & Molecular Anatomy, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.,International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Ryota Kiuchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Makoto Takeda
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Takanori Hiraide
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Yoshifumi Morita
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Hiroyuki Konno
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Hiroya Takeuchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Mitsutoshi Setou
- Department of Cellular & Molecular Anatomy, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.,International Mass Imaging Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Takanori Sakaguchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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22
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Nanoparticle assisted laser desorption/ionization mass spectrometry for small molecule analytes. Mikrochim Acta 2018; 185:200. [DOI: 10.1007/s00604-018-2687-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 01/18/2018] [Indexed: 12/14/2022]
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23
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Silver nanoparticles as matrix for MALDI FTICR MS profiling and imaging of diverse lipids in brain. Talanta 2018; 179:624-631. [DOI: 10.1016/j.talanta.2017.11.067] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/17/2017] [Accepted: 11/28/2017] [Indexed: 11/19/2022]
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24
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Ibrahim H, Jurcic K, Wang JSH, Whitehead SN, Yeung KKC. 1,6-Diphenyl-1,3,5-hexatriene (DPH) as a Novel Matrix for MALDI MS Imaging of Fatty Acids, Phospholipids, and Sulfatides in Brain Tissues. Anal Chem 2017; 89:12828-12836. [PMID: 29095596 DOI: 10.1021/acs.analchem.7b03284] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
1,6-Diphenyl-1,3,5-hexatriene (DPH) is a commonly used fluorescence probe for studying cell membrane-lipids due to its affinity toward the acyl chains in the phospholipid bilayers. In this work, we investigated its use in matrix-assisted laser desorption/ionization (MALDI) as a new matrix for mass spectrometry imaging (MSI) of mouse and rat brain tissue. DPH exhibits very minimal matrix-induced background signals for the analysis of small molecules (below m/z of 1000). In the negative ion mode, DPH permits the highly sensitive detection of small fatty acids (m/z 200-350) as well as a variety of large lipids up to m/z of 1000, including lyso-phospholipid, phosphatidic acid (PA), phosphoethanolamine (PE), phosphatidylserine (PS), phosphatidylglycerol (PG), phosphatidylinositol (PI), and sulfatides (ST). The analytes were mostly detected as the deprotonated ion [M - H]-. Our results also demonstrate that sublimated DPH is stable for at least 24 h under the vacuum of our MALDI mass spectrometer. The ability to apply DPH via sublimation coupled with its low volatility allows us to perform tissue imaging of the above analytes at high spatial resolution. The degree of lipid fragmentation was determined experimentally at varying laser intensities. The results illustrated that the use of relatively low laser energy is important to minimize the artificially generated fatty acid signals. On the other hand, the lipid fragmentation obtained at higher laser energies provided tandem MS information useful for lipid structure elucidation.
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Affiliation(s)
- Hanadi Ibrahim
- Department of Chemistry, ‡Department of Biochemistry, and §Department of Anatomy and Cell Biology, The University of Western Ontario , London, Ontario, Canada
| | - Kristina Jurcic
- Department of Chemistry, ‡Department of Biochemistry, and §Department of Anatomy and Cell Biology, The University of Western Ontario , London, Ontario, Canada
| | - Jasmine S-H Wang
- Department of Chemistry, ‡Department of Biochemistry, and §Department of Anatomy and Cell Biology, The University of Western Ontario , London, Ontario, Canada
| | - Shawn N Whitehead
- Department of Chemistry, ‡Department of Biochemistry, and §Department of Anatomy and Cell Biology, The University of Western Ontario , London, Ontario, Canada
| | - Ken K-C Yeung
- Department of Chemistry, ‡Department of Biochemistry, and §Department of Anatomy and Cell Biology, The University of Western Ontario , London, Ontario, Canada
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25
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Prentice BM, Caprioli RM, Vuiblet V. Label-free molecular imaging of the kidney. Kidney Int 2017; 92:580-598. [PMID: 28750926 PMCID: PMC6193761 DOI: 10.1016/j.kint.2017.03.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 12/25/2022]
Abstract
In this review, we will highlight technologies that enable scientists to study the molecular characteristics of tissues and/or cells without the need for antibodies or other labeling techniques. Specifically, we will focus on matrix-assisted laser desorption/ionization imaging mass spectrometry, infrared spectroscopy, and Raman spectroscopy.
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Affiliation(s)
- Boone M Prentice
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA; Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA
| | - Richard M Caprioli
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA; Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA; Departments of Pharmacology and Medicine, Vanderbilt University, Nashville, Tennessee, USA; Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA.
| | - Vincent Vuiblet
- Biophotonic Laboratory, UMR CNRS 7369 URCA, Reims, France; Nephropathology, Department of Biopathology Laboratory, CHU de Reims, Reims, France; Nephrology and Renal Transplantation department, CHU de Reims, Reims, France.
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26
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Muller L, Baldwin K, Barbacci DC, Jackson SN, Roux A, Balaban CD, Brinson BE, McCully MI, Lewis EK, Schultz JA, Woods AS. Laser Desorption/Ionization Mass Spectrometric Imaging of Endogenous Lipids from Rat Brain Tissue Implanted with Silver Nanoparticles. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:1716-1728. [PMID: 28432654 PMCID: PMC8848835 DOI: 10.1007/s13361-017-1665-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/03/2017] [Accepted: 03/12/2017] [Indexed: 05/04/2023]
Abstract
Mass spectrometry imaging (MSI) of tissue implanted with silver nanoparticulate (AgNP) matrix generates reproducible imaging of lipids in rodent models of disease and injury. Gas-phase production and acceleration of size-selected 8 nm AgNP is followed by controlled ion beam rastering and soft landing implantation of 500 eV AgNP into tissue. Focused 337 nm laser desorption produces high quality images for most lipid classes in rat brain tissue (in positive mode: galactoceramides, diacylglycerols, ceramides, phosphatidylcholines, cholesteryl ester, and cholesterol, and in negative ion mode: phosphatidylethanolamides, sulfatides, phosphatidylinositol, and sphingomyelins). Image reproducibility in serial sections of brain tissue is achieved within <10% tolerance by selecting argentated instead of alkali cationized ions. The imaging of brain tissues spotted with pure standards was used to demonstrate that Ag cationized ceramide and diacylglycerol ions are from intact, endogenous species. In contrast, almost all Ag cationized fatty acid ions are a result of fragmentations of numerous lipid types having the fatty acid as a subunit. Almost no argentated intact fatty acid ions come from the pure fatty acid standard on tissue. Graphical Abstract ᅟ.
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Affiliation(s)
- Ludovic Muller
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, MD, USA
| | | | | | | | - Aurélie Roux
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, MD, USA
| | | | | | | | | | | | - Amina S Woods
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, MD, USA.
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27
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Hansen RL, Lee YJ. High-Spatial Resolution Mass Spectrometry Imaging: Toward Single Cell Metabolomics in Plant Tissues. CHEM REC 2017; 18:65-77. [PMID: 28685965 DOI: 10.1002/tcr.201700027] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Indexed: 12/27/2022]
Abstract
Mass spectrometry imaging (MSI) is a powerful tool that has advanced our understanding of complex biological processes by enabling unprecedented details of metabolic biology to be uncovered. Through the use of high-spatial resolution MSI, metabolite localizations can be obtained with high precision. Here we describe our recent progress to enhance the spatial resolution of matrix-assisted laser desorption/ionization (MALDI) MSI from ∼50 μm with the commercial configuration to ∼5 μm. Additionally, we describe our efforts to develop a 'multiplex MSI' data acquisition method to allow more chemical information to be obtained on a single tissue in a single instrument run, and the development of new matrices to improve the ionization efficiency for a variety of small molecule metabolites. In combination, these contributions, along with the efforts of others, will bring MSI experiments closer to achieving metabolomic scale.
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Affiliation(s)
- Rebecca L Hansen
- Department of Chemistry, Iowa State University, 35 A Roy J Carver Co-Lab, 1111 WOI Road Ames, IA 50011, United States of America
| | - Young Jin Lee
- Department of Chemistry, Iowa State University, 35 A Roy J Carver Co-Lab, 1111 WOI Road Ames, IA 50011, United States of America
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28
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3D Mass Spectrometry Imaging Reveals a Very Heterogeneous Drug Distribution in Tumors. Sci Rep 2016; 6:37027. [PMID: 27841316 PMCID: PMC5107992 DOI: 10.1038/srep37027] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 10/24/2016] [Indexed: 01/26/2023] Open
Abstract
Mass Spectrometry Imaging (MSI) is a widespread technique used to qualitatively describe in two dimensions the distribution of endogenous or exogenous compounds within tissue sections. Absolute quantification of drugs using MSI is a recent challenge that just in the last years has started to be addressed. Starting from a two dimensional MSI protocol, we developed a three-dimensional pipeline to study drug penetration in tumors and to develop a new drug quantification method by MALDI MSI. Paclitaxel distribution and concentration in different tumors were measured in a 3D model of Malignant Pleural Mesothelioma (MPM), which is known to be a very heterogeneous neoplasm, highly resistant to different drugs. The 3D computational reconstruction allows an accurate description of tumor PTX penetration, adding information about the heterogeneity of tumor drug distribution due to the complex microenvironment. The use of an internal standard, homogenously sprayed on tissue slices, ensures quantitative results that are similar to those obtained using HPLC. The 3D model gives important information about the drug concentration in different tumor sub-volumes and shows that the great part of each tumor is not reached by the drug, suggesting the concept of pseudo-resistance as a further explanation for ineffective therapies and tumors relapse.
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29
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Cheng YH, Zhang Y, Chau SL, Lai SKM, Tang HW, Ng KM. Enhancement of Image Contrast, Stability, and SALDI-MS Detection Sensitivity for Latent Fingerprint Analysis by Tuning the Composition of Silver-Gold Nanoalloys. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29668-29675. [PMID: 27750015 DOI: 10.1021/acsami.6b09668] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Metal alloy nanoparticles (NPs) offer a new combination of unique physicochemical properties based on their pure counterparts, which can facilitate the development of novel analytical methods. Here, we demonstrated that Ag-Au alloy NPs could be utilized for optical and mass spectrometric imaging of latent fingerprints (LFPs) with improved image contrast, stability, and detection sensitivity. Upon deposition of Ag-Au alloy NPs (Ag:Au = 60:40 wt %), ridge regions of the LFP became amber colored, while the groove regions appeared purple-blue. The presence of Au in the Ag-Au alloy NPs suppressed aggregation behavior compared to pure AgNPs, thus improving the stability of the developed LFP images. In addition, the Ag component in the Ag-Au alloy NPs enhanced optical absorption efficiency compared to pure AuNPs, resulting in higher contrast LFP images. Moreover, varying the Ag-Au ratio could enable the tuning of the resulting surface plasmonic resonance absorption and hence affect image contrast. Furthermore, the Ag-Au alloy NPs assisted the surface-assisted laser desorption/ionization MS analysis of chemical and biochemical compounds in LFPs, with better detection sensitivity than either pure AgNPs or AuNPs.
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Affiliation(s)
- Yu-Hong Cheng
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Yue Zhang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Siu-Leung Chau
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Samuel Kin-Man Lai
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Ho-Wai Tang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Kwan-Ming Ng
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
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30
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Mohammadi AS, Phan NTN, Fletcher JS, Ewing AG. Intact lipid imaging of mouse brain samples: MALDI, nanoparticle-laser desorption ionization, and 40 keV argon cluster secondary ion mass spectrometry. Anal Bioanal Chem 2016; 408:6857-68. [PMID: 27549796 PMCID: PMC5012256 DOI: 10.1007/s00216-016-9812-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 07/07/2016] [Accepted: 07/18/2016] [Indexed: 01/23/2023]
Abstract
We have investigated the capability of nanoparticle-assisted laser desorption ionization mass spectrometry (NP-LDI MS), matrix-assisted laser desorption ionization (MALDI) MS, and gas cluster ion beam secondary ion mass spectrometry (GCIB SIMS) to provide maximum information available in lipid analysis and imaging of mouse brain tissue. The use of Au nanoparticles deposited as a matrix for NP-LDI MS is compared to MALDI and SIMS analysis of mouse brain tissue and allows selective detection and imaging of groups of lipid molecular ion species localizing in the white matter differently from those observed using conventional MALDI with improved imaging potential. We demonstrate that high-energy (40 keV) GCIB SIMS can act as a semi-soft ionization method to extend the useful mass range of SIMS imaging to analyze and image intact lipids in biological samples, closing the gap between conventional SIMS and MALDI techniques. The GCIB SIMS allowed the detection of more intact lipid compounds in the mouse brain compared to MALDI with regular organic matrices. The 40 keV GCIB SIMS also produced peaks observed in the NP-LDI analysis, and these peaks were strongly enhanced in intensity by exposure of the sample to trifluororacetic acid (TFA) vapor prior to analysis. These MS techniques for imaging of different types of lipids create a potential overlap and cross point that can enhance the information for imaging lipids in biological tissue sections. Schematic of mass spectral imaging of a mouse brain tissue using GCIB-SIMS and MALDI techniques ![]()
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Affiliation(s)
- Amir Saeid Mohammadi
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, 41296, Gothenburg, Sweden.,National Center Imaging Mass Spectrometry, Kemivägen 10, 41296, Gothenburg, Sweden
| | - Nhu T N Phan
- National Center Imaging Mass Spectrometry, Kemivägen 10, 41296, Gothenburg, Sweden.,Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296, Gothenburg, Sweden
| | - John S Fletcher
- National Center Imaging Mass Spectrometry, Kemivägen 10, 41296, Gothenburg, Sweden.,Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296, Gothenburg, Sweden
| | - Andrew G Ewing
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, 41296, Gothenburg, Sweden. .,National Center Imaging Mass Spectrometry, Kemivägen 10, 41296, Gothenburg, Sweden. .,Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296, Gothenburg, Sweden.
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31
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Gold nanoparticles bridging infra-red spectroscopy and laser desorption/ionization mass spectrometry for direct analysis of over-the-counter drug and botanical medicines. Anal Chim Acta 2016; 919:62-69. [DOI: 10.1016/j.aca.2016.03.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 03/09/2016] [Accepted: 03/16/2016] [Indexed: 11/22/2022]
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32
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Abstract
Plant-omics is rapidly becoming an important field of study in the scientific community due to the urgent need to address many of the most important questions facing humanity today with regard to agriculture, medicine, biofuels, environmental decontamination, ecological sustainability, etc. High-performance mass spectrometry is a dominant tool for interrogating the metabolomes, peptidomes, and proteomes of a diversity of plant species under various conditions, revealing key insights into the functions and mechanisms of plant biochemistry.
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Affiliation(s)
- Erin Gemperline
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Caitlin Keller
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Lingjun Li
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.,School of Pharmacy, University of Wisconsin-Madison , 777 Highland Avenue, Madison, Wisconsin 53705, United States
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33
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34
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Phan NTN, Mohammadi AS, Dowlatshahi Pour M, Ewing AG. Laser Desorption Ionization Mass Spectrometry Imaging of Drosophila Brain Using Matrix Sublimation versus Modification with Nanoparticles. Anal Chem 2016; 88:1734-41. [DOI: 10.1021/acs.analchem.5b03942] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Nhu T. N. Phan
- Department
of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen
10, SE-412 96 Gothenburg, Sweden
- National Center
Imaging Mass Spectrometry, Kemivägen
10, SE-412 96 Gothenburg, Sweden
| | - Amir Saeid Mohammadi
- National Center
Imaging Mass Spectrometry, Kemivägen
10, SE-412 96 Gothenburg, Sweden
- Department
of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Masoumeh Dowlatshahi Pour
- National Center
Imaging Mass Spectrometry, Kemivägen
10, SE-412 96 Gothenburg, Sweden
- Department
of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Andrew G. Ewing
- Department
of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen
10, SE-412 96 Gothenburg, Sweden
- National Center
Imaging Mass Spectrometry, Kemivägen
10, SE-412 96 Gothenburg, Sweden
- Department
of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
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35
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Liu X, Hummon AB. Mass spectrometry imaging of therapeutics from animal models to three-dimensional cell cultures. Anal Chem 2015; 87:9508-19. [PMID: 26084404 PMCID: PMC4766864 DOI: 10.1021/acs.analchem.5b00419] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Mass spectrometry imaging (MSI) is a powerful label-free technique for the investigation of the spatial distribution of molecules at complex surfaces and has been widely used in the pharmaceutical sciences to understand the distribution of different drugs and their metabolites in various biological samples, ranging from cell-based models to tissues. Here, we review the current applications of MSI for drug studies in animal models, followed by a discussion of the novel advances of MSI in three-dimensional (3D) cell cultures for accurate, efficient, and high-throughput analyses to evaluate therapeutics.
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Affiliation(s)
- Xin Liu
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
| | - Amanda B. Hummon
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
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36
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Canela N, Herrero P, Mariné S, Nadal P, Ras MR, Rodríguez MÁ, Arola L. Analytical methods in sphingolipidomics: Quantitative and profiling approaches in food analysis. J Chromatogr A 2015; 1428:16-38. [PMID: 26275862 DOI: 10.1016/j.chroma.2015.07.110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/27/2015] [Accepted: 07/31/2015] [Indexed: 02/07/2023]
Abstract
In recent years, sphingolipidomics has emerged as an interesting omic science that encompasses the study of the full sphingolipidome characterization, content, structure and activity in cells, tissues or organisms. Like other omics, it has the potential to impact biomarker discovery, drug development and systems biology knowledge. Concretely, dietary food sphingolipids have gained considerable importance due to their extensively reported bioactivity. Because of the complexity of this lipid family and their diversity among foods, powerful analytical methodologies are needed for their study. The analytical tools developed in the past have been improved with the enormous advances made in recent years in mass spectrometry (MS) and chromatography, which allow the convenient and sensitive identification and quantitation of sphingolipid classes and form the basis of current sphingolipidomics methodologies. In addition, novel hyphenated nuclear magnetic resonance (NMR) strategies, new ionization strategies, and MS imaging are outlined as promising technologies to shape the future of sphingolipid analyses. This review traces the analytical methods of sphingolipidomics in food analysis concerning sample extraction, chromatographic separation, the identification and quantification of sphingolipids by MS and their structural elucidation by NMR.
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Affiliation(s)
- Núria Canela
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Pol Herrero
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Sílvia Mariné
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Pedro Nadal
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Maria Rosa Ras
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | | | - Lluís Arola
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain.
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37
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Silina YE, Koch M, Volmer DA. Influence of surface melting effects and availability of reagent ions on LDI-MS efficiency after UV laser irradiation of Pd nanostructures. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:578-585. [PMID: 25800194 DOI: 10.1002/jms.3564] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 12/09/2014] [Accepted: 12/10/2014] [Indexed: 06/04/2023]
Abstract
In this study, the influence of surface morphology, reagent ions and surface restructuring effects on atmospheric pressure laser desorption/ionization (LDI) for small molecules after laser irradiation of palladium self-assembled nanoparticular (Pd-NP) structures has been systematically studied. The dominant role of surface morphology during the LDI process, which was previously shown for silicon-based substrates, has not been investigated for metal-based substrates before. In our experiments, we demonstrated that both the presence of reagent ions and surface reorganization effects--in particular, melting--during laser irradiation was required for LDI activity of the substrate. The synthesized Pd nanostructures with diameters ranging from 60 to 180 nm started to melt at similar temperatures, viz. 890-898 K. These materials exhibited different LDI efficiencies, however, with Pd-NP materials being the most effective surface in our experiments. Pd nanostructures of diameters >400-800 nm started to melt at higher temperatures, >1000 K, making such targets more resistant to laser irradiation, with subsequent loss of LDI activity. Our data demonstrated that both melting of the surface structures and the presence of reagent ions were essential for efficient LDI of the investigated low molecular weight compounds. This dependence of LDI on melting points was exploited further to improve the performance of Pd-NP-based sampling targets. For example, adding sodium hypophosphite as reducing agent to Pd electrolyte solutions during synthesis lowered the melting points of the Pd-NP materials and subsequently gave reduced laser fluence requirements for LDI.
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Affiliation(s)
- Yuliya E Silina
- Leibniz Institute of New Materials (INM), Saarbrücken, Germany; Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
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38
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Muller L, Kailas A, Jackson SN, Roux A, Barbacci DC, Schultz JA, Balaban CD, Woods AS. Lipid imaging within the normal rat kidney using silver nanoparticles by matrix-assisted laser desorption/ionization mass spectrometry. Kidney Int 2015; 88:186-92. [PMID: 25671768 PMCID: PMC4527327 DOI: 10.1038/ki.2015.3] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 11/24/2014] [Accepted: 12/05/2014] [Indexed: 02/07/2023]
Abstract
The well-characterized cellular and structural components of the kidney show distinct regional compositions and distribution of lipids. In order to more fully analyze the renal lipidome we developed a matrix-assisted laser desorption/ionization mass spectrometry approach for imaging that may be used to pinpoint sites of changes from normal in pathological conditions. This was accomplished by implanting sagittal cryostat rat kidney sections with a stable, quantifiable and reproducible uniform layer of silver using a magnetron sputtering source to form silver nanoparticles. Thirty-eight lipid species including seven ceramides, eight diacylglycerols, 22 triacylglycerols, and cholesterol were detected and imaged in positive ion mode. Thirty-six lipid species consisting of seven sphingomyelins, 10 phosphatidylethanolamines, one phosphatidylglycerol, seven phosphatidylinositols, and 11 sulfatides were imaged in negative ion mode for a total of seventy-four high-resolution lipidome maps of the normal kidney. Thus, our approach is a powerful tool not only for studying structural changes in animal models of disease, but also for diagnosing and tracking stages of disease in human kidney tissue biopsies.
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Affiliation(s)
- Ludovic Muller
- 1] Structural Biology Unit, NIDA IRP, NIH, Baltimore, Maryland, USA [2] Departments of Otolaryngology, Neurobiology, Communication Sciences & Disorders, and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Ajay Kailas
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, Maryland, USA
| | | | - Aurelie Roux
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, Maryland, USA
| | - Damon C Barbacci
- 1] Structural Biology Unit, NIDA IRP, NIH, Baltimore, Maryland, USA [2] Ionwerks, Houston, Texas, USA
| | | | - Carey D Balaban
- Departments of Otolaryngology, Neurobiology, Communication Sciences & Disorders, and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Amina S Woods
- Structural Biology Unit, NIDA IRP, NIH, Baltimore, Maryland, USA
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39
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Sekuła J, Nizioł J, Rode W, Ruman T. Silver nanostructures in laser desorption/ionization mass spectrometry and mass spectrometry imaging. Analyst 2015; 140:6195-209. [DOI: 10.1039/c5an00943j] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Silver nanoparticles have been successfully applied as a matrix replacement for the laser desorption/ionization time-of-flight mass spectrometry (LDI-ToF-MS).
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Affiliation(s)
- Justyna Sekuła
- Rzeszów University of Technology
- Faculty of Chemistry
- Bioorganic Chemistry Laboratory
- 35-959 Rzeszów
- Poland
| | - Joanna Nizioł
- Rzeszów University of Technology
- Faculty of Chemistry
- Bioorganic Chemistry Laboratory
- 35-959 Rzeszów
- Poland
| | - Wojciech Rode
- Nencki Institute of Experimental Biology
- 02-093 Warsaw
- Poland
| | - Tomasz Ruman
- Rzeszów University of Technology
- Faculty of Chemistry
- Bioorganic Chemistry Laboratory
- 35-959 Rzeszów
- Poland
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40
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Waki M, Sugiyama E, Kondo T, Sano K, Setou M. Nanoparticle-assisted laser desorption/ionization for metabolite imaging. Methods Mol Biol 2015; 1203:159-173. [PMID: 25361676 DOI: 10.1007/978-1-4939-1357-2_16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) has enabled the spatial analysis of various molecules, including peptides, nucleic acids, lipids, and drug molecules. To expand the capabilities of MALDI-IMS, we have established an imaging technique using metal nanoparticles (NPs) to visualize metabolites, termed nanoparticle-assisted laser desorption/ionization imaging mass spectrometry (nano-PALDI-IMS). By utilizing Ag-, Fe-, Au-, and TiO2-derived NPs, we have succeeded in visualizing various metabolites, including fatty acid and glycosphingolipids, with higher sensitivity and spatial resolution than conventional techniques. Herein, we describe the practical experimental procedures and methods associated with nano-PALDI-IMS for the visualization of these molecules.
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Affiliation(s)
- Michihiko Waki
- Department of Cell Biology and Anatomy, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-ku, Hamamatsu-shi, Shizuoka, Japan
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Feenstra AD, Hansen RL, Lee YJ. Multi-matrix, dual polarity, tandem mass spectrometry imaging strategy applied to a germinated maize seed: toward mass spectrometry imaging of an untargeted metabolome. Analyst 2015; 140:7293-304. [DOI: 10.1039/c5an01079a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mass spectrometry imaging strategy to allow for visualization and identification of compounds on tissue to help understand plant metabolism.
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Affiliation(s)
- Adam D. Feenstra
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
| | - Rebecca L. Hansen
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
| | - Young Jin Lee
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
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42
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Ly A, Schöne C, Becker M, Rattke J, Meding S, Aichler M, Suckau D, Walch A, Hauck SM, Ueffing M. High-resolution MALDI mass spectrometric imaging of lipids in the mammalian retina. Histochem Cell Biol 2014; 143:453-62. [DOI: 10.1007/s00418-014-1303-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2014] [Indexed: 12/12/2022]
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López de Laorden C, Beloqui A, Yate L, Calvo J, Puigivila M, Llop J, Reichardt NC. Nanostructured Indium Tin Oxide Slides for Small-Molecule Profiling and Imaging Mass Spectrometry of Metabolites by Surface-Assisted Laser Desorption Ionization MS. Anal Chem 2014; 87:431-40. [DOI: 10.1021/ac5025864] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Carlos López de Laorden
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Ana Beloqui
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Luis Yate
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Javier Calvo
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Maria Puigivila
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Jordi Llop
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
| | - Niels-Christian Reichardt
- Glycotechnology Laboratory, ‡Surface Analysis and Fabrication Platform, §Mass Spectrometry
Platform, and ∥Radiochemistry Laboratory, CIC biomaGUNE, Paseo Miramon 182, 20009 San Sebastian, Spain
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Sun N, Ly A, Meding S, Witting M, Hauck SM, Ueffing M, Schmitt-Kopplin P, Aichler M, Walch A. High-resolution metabolite imaging of light and dark treated retina using MALDI-FTICR mass spectrometry. Proteomics 2014; 14:913-23. [PMID: 24459044 DOI: 10.1002/pmic.201300407] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 12/06/2013] [Accepted: 12/20/2013] [Indexed: 11/06/2022]
Abstract
MS imaging (MSI) is a valuable tool for diagnostics and systems biology studies, being a highly sensitive, label-free technique capable of providing comprehensive spatial distribution of different classes of biomolecules. The application of MSI to the study of endogenous compounds has received considerable attention because metabolites are the result of the interactions of a biosystem with its environment. MSI can therefore enhance understanding of disease mechanisms and elucidate mechanisms for biological variation. We present the in situ comparative metabolomics imaging data for analyses of light- and dark-treated retina using MALDI-FTICR. A wide variety of tissue metabolites were imaged at a high spatial resolution. These include nucleotides, central carbon metabolism pathway intermediates, 2-oxocarboxylic acid metabolism, oxidative phosphorylation, glycerophospholipid metabolism, and cysteine and methionine metabolites. The high lateral resolution enabled the differentiation of retinal layers, allowing determination of the spatial distributions of different endogenous compounds. A number of metabolites demonstrated differences between light and dark conditions. These findings add to the understanding of metabolic activity in the retina.
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Affiliation(s)
- Na Sun
- Research Unit Analytical Pathology, Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
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45
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Pirkl A, Meier M, Popkova Y, Letzel M, Schnapp A, Schiller J, Dreisewerd K. Analysis of free fatty acids by ultraviolet laser desorption ionization mass spectrometry using insect wings as hydrophobic sample substrates. Anal Chem 2014; 86:10763-71. [PMID: 25268473 DOI: 10.1021/ac5020047] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Physiologically relevant free fatty acids (FFAs) were analyzed by UV-laser desorption/ionization orthogonal extracting time-of-flight mass spectrometry (LDI-oTOF-MS). Dissected wings from Drosophila melanogaster fruit flies were used as the hydrophobic, laser energy strongly absorbing sample substrates. Using untreated substrates produces predominantly molecular [M + K](+) ions of the FFAs, whereas other alkali metal adducts can be generated by treating the wings with the corresponding alkali hydroxide before spotting of analyte. Limits of detection for the positive ion mode were determined for mixtures of isolated FFAs to values in the low 10 pmol range. Specific values depend on chain length and degree of unsaturation. R(2) coefficients for the analysis of saturated FFAs were found to be generally close to 0.98 over about 3 orders of magnitude if an internal standard (15:0 FFA) was added. Semiquantitative analyses of mixtures containing unsaturated FFAs are also possible but require more effort on the calibration strategy. Notably, both saturated and (poly-)unsaturated FFAs are detected sensitively in the presence of relatively high concentrations of other physiologically abundant lipids (phospholipids and triacyclglycerols). This simplifies screening of the FFA composition in crude tissue extracts. This feature is demonstrated by the analysis of a crude liver extract and that of fingermarks.
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Affiliation(s)
- Alexander Pirkl
- Institute for Hygiene, University of Münster , Robert-Koch-Straße 41, 48149 Münster, Germany
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46
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Determination of sterols using liquid chromatography with off-line surface-assisted laser desorption/ionization mass spectrometry. J Chromatogr A 2014; 1358:102-9. [DOI: 10.1016/j.chroma.2014.06.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 06/23/2014] [Accepted: 06/24/2014] [Indexed: 11/15/2022]
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Hayasaka T, Goto-Inoue N, Masaki N, Ikegami K, Setou M. Application of 2,5-dihydroxyacetophenone with sublimation provides efficient ionization of lipid species by atmospheric pressure matrix-assisted laser desorption/ionization imaging mass spectrometry. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5592] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takahiro Hayasaka
- Department of Cell Biology and Anatomy; Hamamatsu University School of Medicine; 1-20-1 Handayama, Higashi-ku Hamamatsu Shizuoka 431-3192 Japan
| | - Naoko Goto-Inoue
- Department of Health Promotion Sciences; Tokyo Metropolitan University; 1-1 Minami-Osawa, Hachioji Tokyo 192-0397 Japan
| | - Noritaka Masaki
- Department of Cell Biology and Anatomy; Hamamatsu University School of Medicine; 1-20-1 Handayama, Higashi-ku Hamamatsu Shizuoka 431-3192 Japan
| | - Koji Ikegami
- Department of Cell Biology and Anatomy; Hamamatsu University School of Medicine; 1-20-1 Handayama, Higashi-ku Hamamatsu Shizuoka 431-3192 Japan
| | - Mitsutoshi Setou
- Department of Cell Biology and Anatomy; Hamamatsu University School of Medicine; 1-20-1 Handayama, Higashi-ku Hamamatsu Shizuoka 431-3192 Japan
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48
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Yang M, Fujino T. Gold nanoparticles loaded on zeolite as inorganic matrix for laser desorption/ionization mass spectrometry of small molecules. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2013.12.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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49
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Zemski Berry KA, Gordon WC, Murphy RC, Bazan NG. Spatial organization of lipids in the human retina and optic nerve by MALDI imaging mass spectrometry. J Lipid Res 2013; 55:504-15. [PMID: 24367044 DOI: 10.1194/jlr.m044990] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
MALDI imaging mass spectrometry (IMS) was used to characterize lipid species within sections of human eyes. Common phospholipids that are abundant in most tissues were not highly localized and observed throughout the accessory tissue, optic nerve, and retina. Triacylglycerols were highly localized in accessory tissue, whereas sulfatide and plasmalogen glycerophosphoethanolamine (PE) lipids with a monounsaturated fatty acid were found enriched in the optic nerve. Additionally, several lipids were associated solely with the inner retina, photoreceptors, or retinal pigment epithelium (RPE); a plasmalogen PE lipid containing DHA (22:6), PE(P-18:0/22:6), was present exclusively in the inner retina, and DHA-containing glycerophosphatidylcholine (PC) and PE lipids were found solely in photoreceptors. PC lipids containing very long chain (VLC)-PUFAs were detected in photoreceptors despite their low abundance in the retina. Ceramide lipids and the bis-retinoid, N-retinylidene-N-retinylethanolamine, was tentatively identified and found only in the RPE. This MALDI IMS study readily revealed the location of many lipids that have been associated with degenerative retinal diseases. Complex lipid localization within retinal tissue provides a global view of lipid organization and initial evidence for specific functions in localized regions, offering opportunities to assess their significance in retinal diseases, such as macular degeneration, where lipids have been implicated in the disease process.
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Affiliation(s)
- Karin A Zemski Berry
- Department of Pharmacology, University of Colorado Denver, Aurora, CO 80045; and
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50
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Jackson SN, Baldwin K, Muller L, Womack VM, Schultz JA, Balaban C, Woods AS. Imaging of lipids in rat heart by MALDI-MS with silver nanoparticles. Anal Bioanal Chem 2013; 406:1377-86. [PMID: 24309627 DOI: 10.1007/s00216-013-7525-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 10/14/2013] [Accepted: 11/19/2013] [Indexed: 12/21/2022]
Abstract
Lipids are a major component of heart tissue and perform several important functions such as energy storage, signaling, and as building blocks of biological membranes. The heart lipidome is quite diverse consisting of glycerophospholipids such as phosphatidylcholines (PCs), phosphatidylethanolamines (PEs), phosphatidylinositols (PIs), phosphatidylglycerols (PGs), cardiolipins (CLs), and glycerolipids, mainly triacylglycerols (TAGs). In this study, mass spectrometry imaging (MSI) enabled by matrix implantation of ionized silver nanoparticles (AgNP) was used to map several classes of lipids in heart tissue. The use of AgNP matrix implantation was motivated by our previous work showing that implantation doses of only 10(14)/cm(2) of 2 nm gold nanoparticulates into the first 10 nm of the near surface of the tissue enabled detection of most brain lipids (including neutral lipid species such as cerebrosides) more efficiently than traditional organic MALDI matrices. Herein, a similar implantation of 500 eV AgNP(-) across the entire heart tissue section results in a quick, reproducible, solvent-free, uniform matrix concentration of 6 nm AgNP residing near the tissue surface. MALDI-MSI analysis of either positive or negative ions produce high-quality images of several heart lipid species. In negative ion mode, 24 lipid species [16 PEs, 4 PIs, 1 PG, 1 CL, 2 sphingomyelins (SMs)] were imaged. Positive ion images were also obtained from 29 lipid species (10 PCs, 5 PEs, 5 SMs, 9 TAGs) with the TAG species being heavily concentrated in vascular regions of the heart.
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Affiliation(s)
- Shelley N Jackson
- Structural Biology Unit, NIDA IRP, NIH, 333 Cassell Drive, Room 1120, Baltimore, MD, 21224, USA
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