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.

08:00 EDT 22nd October 2015 | BioPortfolio

Summary of "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."

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 µm-thick whole-body tissue sections at a spatial resolution of 12 µm 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 µm 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.


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This article was published in the following journal.

Name: Analytical chemistry
ISSN: 1520-6882


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Medical and Biotech [MESH] Definitions

A protozoan parasite of rodents transmitted by the mosquito Anopheles stephensi.

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Thinly cut sections of frozen tissue specimens prepared with a cryostat or freezing microtome.

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