Advancement of Mass Spectrometry Imaging for Food Science

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Analytical Methods".

Deadline for manuscript submissions: closed (20 July 2020) | Viewed by 17031

Special Issue Editor


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Guest Editor
Agricultural Technology and Innovation Research Institute, Kindai University, 204-3327 Naka-machi, Nara 631-8505, Japan
Interests: mass spectrometry imaging; food science; boundary medicine; food chemistry; laboratory medicine; agricultural chemistry; analytical chemistry

Special Issue Information

Dear Colleagues,

Mass spectrometry plays an important role in food science. High-performance liquid chromatography–mass spectrometry (HPLC–MS) and gas chromatography–mass spectrometry (GC–MS) have enabled the quantification and identification of chemical components in analyses of molecules of interest in our bodies, processed foods, or agricultural, forestry, and marine products. These techniques provide us with important information to understand the function of molecules of interest. However, distributional data cannot be obtained by these techniques. Mass spectrometry imaging (MSI) is an ideal complementary technique to visualize the distribution of molecules of interest in subjects of analysis. The versatility of MSI is opening new frontiers in food science and related fields; however, the methodology or applications of MSI in food science are not fully established. I hope to introduce various studies of MSI in food science and related fields in this Special Issue.

Prof. Nobuhiro Zaima
Guest Editor

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Keywords

  • Mass spectrometry imaging
  • Food science
  • Analytical chemistry
  • Food chemistry
  • Agricultural science
  • Boundary medicine

Published Papers (4 papers)

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Research

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8 pages, 1372 KiB  
Article
Novel Blotting Method for Mass Spectrometry Imaging of Metabolites in Strawberry Fruit by Desorption/Ionization Using Through Hole Alumina Membrane
by Hirofumi Enomoto, Masahiro Kotani and Takayuki Ohmura
Foods 2020, 9(4), 408; https://doi.org/10.3390/foods9040408 - 1 Apr 2020
Cited by 18 | Viewed by 3817
Abstract
Mass spectrometry imaging (MSI) using matrix-assisted laser desorption/ionization (MALDI) is a powerful technique for visualizing metabolites in the strawberry fruit. During sample preparation for MALDI-MSI, sectioning of the samples is usually required. In general, MALDI-MSI analysis of strawberry fruits that are larger than [...] Read more.
Mass spectrometry imaging (MSI) using matrix-assisted laser desorption/ionization (MALDI) is a powerful technique for visualizing metabolites in the strawberry fruit. During sample preparation for MALDI-MSI, sectioning of the samples is usually required. In general, MALDI-MSI analysis of strawberry fruits that are larger than a single glass slide is difficult because thin sections cannot be prepared. In this study, we attempted to visualize metabolites in large strawberry fruits by MSI, employing a blotting method that uses desorption ionization using a through-hole alumina membrane (DIUTHAME) chip. Large strawberry fruits were cut and a DIUTHAME chip was set on the cross-section to blot the metabolites. After drying the DIUTHAME chip, the metabolites were measured in positive and negative ion modes using a commercial MALDI-type mass spectrometer. Several peaks were detected in both the ion modes. Various metabolites related to food quality, such as sugars, organic acids, and anthocyanins, were detected and successfully visualized by blotting on a DIUTHAME chip in MSI. These results suggest that blotting using a DIUTHAME chip in MSI is useful for visualizing the metabolites present in the strawberry fruit. Full article
(This article belongs to the Special Issue Advancement of Mass Spectrometry Imaging for Food Science)
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8 pages, 1073 KiB  
Article
Application of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging for Evaluating the Quality of Fish Fillets
by Mizuki Morisasa, Keisuke Kimura, Motoki Sumida, Saya Fukumoto, Tadashi Tamura, Riko Takeuchi, Tsukasa Mori and Naoko Goto-Inoue
Foods 2020, 9(4), 402; https://doi.org/10.3390/foods9040402 - 1 Apr 2020
Cited by 4 | Viewed by 2301
Abstract
Consumption of fish is rapidly increasing worldwide. It is important to evaluate fish fillet quality because fish undergoes physical and chemical changes during frozen storage. Fish fillets exhibit formaldehyde (FA) accumulation from the decomposition of trimethylamine N-oxide. FA is a powerful protein denaturant; [...] Read more.
Consumption of fish is rapidly increasing worldwide. It is important to evaluate fish fillet quality because fish undergoes physical and chemical changes during frozen storage. Fish fillets exhibit formaldehyde (FA) accumulation from the decomposition of trimethylamine N-oxide. FA is a powerful protein denaturant; thus, it is important to avoid FA buildup during fish processing to preserve fish quality, especially texture. To determine where FA accumulates, in order to maintain the quality of fish fillets, we performed matrix-assisted laser desorption/ionization mass spectrometry imaging, aiming to identify muscle-derived peptides, which reflect conditions such as denaturation and/or aggregation. We used frozen sections from which lipophilic molecules were washed out and detected various peptide peaks. Furthermore, we tried to identify indices to represent fish fillet softening by protease treatment. We could detect characteristic peaks owing to FA and protease treatment; the findings were consistent with the results of texture profiles showing fish fillet’s real solidity. These molecules might thus serve as effective markers to evaluate fish fillet quality. Full article
(This article belongs to the Special Issue Advancement of Mass Spectrometry Imaging for Food Science)
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14 pages, 3276 KiB  
Article
Unique Distribution of Diacyl-, Alkylacyl-, and Alkenylacyl-Phosphatidylcholine Species Visualized in Pork Chop Tissues by Matrix-Assisted Laser Desorption/Ionization–Mass Spectrometry Imaging
by Hirofumi Enomoto, Tomohiro Furukawa, Shiro Takeda, Hajime Hatta and Nobuhiro Zaima
Foods 2020, 9(2), 205; https://doi.org/10.3390/foods9020205 - 16 Feb 2020
Cited by 17 | Viewed by 3618
Abstract
Phosphatidylcholine (PC) is the major phospholipid in meat and influences meat qualities, such as healthiness. PC is classified into three groups based on the bond at the sn-1 position: Diacyl, alkylacyl, and alkenylacyl. To investigate their composition and distribution in pork tissues, including [...] Read more.
Phosphatidylcholine (PC) is the major phospholipid in meat and influences meat qualities, such as healthiness. PC is classified into three groups based on the bond at the sn-1 position: Diacyl, alkylacyl, and alkenylacyl. To investigate their composition and distribution in pork tissues, including longissimus thoracis et lumborum (loin) spinalis muscles, intermuscular fat, and transparent tissues, we performed matrix-assisted laser desorption/ionization–mass spectrometry imaging (MALDI–MSI). Eleven diacyl-, seven alkylacyl-, and six alkenylacyl-PCs were identified using liquid chromatography (LC)-tandem MS (MS/MS) analysis. Despite many alkylacyl- and alkenylacyl-PC species sharing identical m/z values, we were able to visualize these PC species using MALDI–MSI. Diacyl- and alkylacyl- and/or alkenylacyl-PC species showed unique distribution patterns in the tissues, suggesting that their distribution patterns were dependent on their fatty acid compositions. PCs are a major dietary source of choline in meat, and the amount was significantly higher in the muscle tissues. Consumption of choline mitigates age-related memory decline and neurodegenerative diseases; therefore, the consumption of pork muscle tissues could help to mitigate these diseases. These results support the use of MALDI–MSI analysis for assessing the association between PC species and the quality parameters of meat. Full article
(This article belongs to the Special Issue Advancement of Mass Spectrometry Imaging for Food Science)
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Review

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19 pages, 1576 KiB  
Review
Application of Mass Spectrometry Imaging for Visualizing Food Components
by Yukihiro Yoshimura and Nobuhiro Zaima
Foods 2020, 9(5), 575; https://doi.org/10.3390/foods9050575 - 4 May 2020
Cited by 43 | Viewed by 6719
Abstract
Consuming food is essential for survival, maintaining health, and triggering positive emotions like pleasure. One of the factors that drive us toward such behavior is the presence of various compounds in foods. There are many methods to analyze these molecules in foods; however, [...] Read more.
Consuming food is essential for survival, maintaining health, and triggering positive emotions like pleasure. One of the factors that drive us toward such behavior is the presence of various compounds in foods. There are many methods to analyze these molecules in foods; however, it is difficult to analyze the spatial distribution of these compounds using conventional techniques, such as mass spectrometry combined with high-performance liquid chromatography or gas chromatography. Mass spectrometry imaging (MSI) is a two-dimensional ionization technology that enables detection of compounds in tissue sections without extraction, purification, separation, or labeling. There are many methods for ionization of analytes, including secondary ion mass spectrometry, matrix-assisted laser desorption/ionization, and desorption electrospray ionization. Such MSI technologies can provide spatial information on the location of a specific analyte in food. The number of studies utilizing MSI technologies in food science has been increasing in the past decade. This review provides an overview of some of the recent applications of MSI in food science and related fields. In the future, MSI will become one of the most promising technologies for visualizing the distribution of food components and for identifying food-related factors by their molecular weights to improve quality, quality assurance, food safety, nutritional analysis, and to locate administered food factors. Full article
(This article belongs to the Special Issue Advancement of Mass Spectrometry Imaging for Food Science)
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