Title

Laser ablation sample transfer for localized LC-MS/MS proteomic analysis of tissue

Document Type

Article

Publication Date

4-1-2016

Abstract

© 2016 John Wiley & Sons, Ltd. We have developed a mid-infrared laser ablation sampling technique for nano-flow liquid chromatography coupled with tandem mass spectrometry proteomic profiling of discrete regions from biological samples. Laser ablation performed in transmission geometry was used to transfer material from 50-μm thick tissue sections mounted on a glass microscope slide to a capturing solvent. Captured samples were processed using filter-aided sample preparation and enzymatically digested to produce tryptic peptides for data-dependent analysis with an ion trap mass spectrometer. Comparison with ultraviolet laser capture microdissection from neighboring regions on the same tissue section revealed that infrared laser ablation transfer has higher reproducibility between samples from different consecutive sections. Both techniques allowed for proteomics investigation of different organelles without the addition of surfactants.

Publication Source (Journal or Book title)

Journal of Mass Spectrometry

First Page

261

Last Page

268

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