scholarly journals The Detection of Glycosphingolipids in Brain Tissue Sections by Imaging Mass Spectrometry Using Gold Nanoparticles

Author(s):  
Naoko Goto-Inoue ◽  
Takahiro Hayasaka ◽  
Nobuhiro Zaima ◽  
Yukiyasu Kashiwagi ◽  
Mari Yamamoto ◽  
...  
2018 ◽  
Vol 54 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Daiki Muko ◽  
Takanori Ikenaga ◽  
Masanori Kasai ◽  
Janice B. Rabor ◽  
Atsushi Nishitani ◽  
...  

2020 ◽  
Vol 3 (1) ◽  
pp. 61-87 ◽  
Author(s):  
Theodore Alexandrov

Spatial metabolomics is an emerging field of omics research that has enabled localizing metabolites, lipids, and drugs in tissue sections, a feat considered impossible just two decades ago. Spatial metabolomics and its enabling technology—imaging mass spectrometry—generate big hyperspectral imaging data that have motivated the development of tailored computational methods at the intersection of computational metabolomics and image analysis. Experimental and computational developments have recently opened doors to applications of spatial metabolomics in life sciences and biomedicine. At the same time, these advances have coincided with a rapid evolution in machine learning, deep learning, and artificial intelligence, which are transforming our everyday life and promise to revolutionize biology and healthcare. Here, we introduce spatial metabolomics through the eyes of a computational scientist, review the outstanding challenges, provide a look into the future, and discuss opportunities granted by the ongoing convergence of human and artificial intelligence.


2020 ◽  
Author(s):  
Katerina Djambazova ◽  
Dustin R. Klein ◽  
Lukasz Migas ◽  
Elizabeth Neumann ◽  
Emilio Rivera ◽  
...  

<p>Lipids are a structurally diverse class of molecules with important biological functions including cellular signaling and energy storage. Matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) allows for direct map-ping of biomolecules in tissue. Fully characterizing the structural diversity of lipids remains a challenge due to the presence of isobaric and isomeric species, which greatly complicates data interpretation when only <i>m/z </i>information is available. Integrating ion mobility separations aids in deconvoluting these complex mixtures and addressing the challenges of lipid IMS. Here we demonstrate that a MALDI quadrupole time-of-flight (Q-TOF) mass spectrometer with trapped ion mobility spectrometry (TIMS) enables approximately a ~270% increase in the peak capacity during IMS experiments. MALDI TIMS-MS separation of lipid isomer standards, including sn-backbone isomers, acyl chain isomers, as well as double bond positional and geometric isomers are demonstrated. As a proof-of-concept, <i>in situ </i>separation and imaging of lipid isomers with distinct spatial distributions was performed using tissue sections from a whole-body mouse pup.</p>


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