Journal article

Publication year: 2015

Pages: 11309-11316

Journal: Analytical Chemistry

Volume number: 87

Issue number: 22

ISSN: 0003-2700

eISSN: 1520-6882

Open access status: Bronze

DOI Link: https://doi.org/10.1021/acs.analchem.5b02781

Publisher: American Chemical Society

Abstract: 
High-resolution atmospheric-pressure scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging (AP-SMALDI MSI) has been employed to study the molecular anatomical structure of rodent malaria vector Anopheles stephensi mosquitoes. A dedicated sample preparation method was developed which suits both, the special tissue properties of the sample and the requirements of high-resolution MALDI imaging. Embedding in 5% carboxymethylcellulose (CMC) was used to maintain the tissue integrity of the whole mosquitoes, being very soft, fragile, and difficult to handle. Individual lipid compounds, specifically representing certain cell types, tissue areas, or organs, were detected and imaged in 20 mu m-thick whole-body tissue sections at a spatial resolution of 12 mu m per image pixel. Mass spectrometric data and information quality were based on a mass resolution of 70 000 (at m/z 200) and a mass accuracy of better than 2 ppm in positive-ion mode on an orbital trapping mass spectrometer. A total of 67 imaged lipids were assigned by database search and, in a number of cases, identified via additional MS/MS fragmentation studies directly from tissue. This is the first MSI study at 12 ym spatial resolution of the malaria vector Anopheles. The study provides insights into the molecular anatomy of Anopheles stephensi and the distribution and localization of major classes of glycerophospholipids and sphingolipids. These data can be a basis for future experiments, investigating, e.g., the metabolism of Plasmodium-infected and -uninfected Anopheles mosquitoes.

Harvard Citation style: Khalil, S., Römpp, A., Pretzel, J., Becker, K. and Spengler, B. (2015) Phospholipid Topography of Whole-Body Sections of the Anopheles stephensi Mosquito, Characterized by High-Resolution Atmospheric-Pressure Scanning Microprobe Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging, Analytical Chemistry, 87(22), pp. 11309-11316. https://doi.org/10.1021/acs.analchem.5b02781

APA Citation style: Khalil, S., Römpp, A., Pretzel, J., Becker, K., & Spengler, B. (2015). Phospholipid Topography of Whole-Body Sections of the Anopheles stephensi Mosquito, Characterized by High-Resolution Atmospheric-Pressure Scanning Microprobe Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging. Analytical Chemistry. 87(22), 11309-11316. https://doi.org/10.1021/acs.analchem.5b02781