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A Novel microproteomic approach using Laser Capture Microdissection to study cellular protrusions

ABSTRACT: Cell-cell communication is vital to multicellular organisms, and distinct types of cellular protrusions play critical roles during development, cell signaling, and the spreading of pathogens and cancer. The differences in the structure and protein composition of these different types of protrusions that could explain their specific functions have not been elucidated due to the lack of a method for their specific isolation and analysis. In this paper, we describe, for the first time, a method to specifically isolate distinct protrusion subtypes, based on their morphological structures or fluorescent markers, using laser capture microdissection (LCM). Combined with a unique fixation and protein extraction protocol, we have pushed the limits of microproteomics and demonstrate that proteins from LCM isolated protrusions can successfully and reproducibly be identified by mass spectrometry using ultra-high field Orbitrap technologies. Our method confirms that different types of protrusions have distinct proteomes and it promises to advance the characterization and understanding of these unique structures.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Mus Musculus (ncbitaxon:10090)

SUBMITTER: Karine Gousset

PROVIDER: MSV000082576 | MassIVE | Thu Jul 05 23:57:00 BST 2018

REPOSITORIES: MassIVE

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