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Mass spectrometry imaging of lipids and metabolites: from fruit fly brains to single nanometer vesicles

Andrew G Ewing (Institutionen för kemi och kemiteknik, Analytisk kemi ; Institutionen för kemi och molekylärbiologi)
New Biotechnology (1871-6784). Vol. 33 (2016), Supplement: S Meeting Abstract: O5-1 , p. S21-S21.
[Artikel, refereegranskad vetenskaplig]

We have been developing mass spectrometry imaging methods to study the process of neurocommunication at the system and cellular level. We focus on PC12 cells as a model of exocytosis and the fly model (Drosophila melanogaster) providing a unique system to examine neurotransmitter release and drug dependence mechanisms in a small, but complete system. Mass spectrometry imaging with ion beams allows spatial resolution of a few micrometers down to 40 nanometers in favorable cases. We have been using secondary ion mass spectrometry (SIMS) with a unique 40-kV argon cluster ion source and the NanoSIMS to measure the lipids across the fly brain and catecholamine in nanometer vesicles, respectively. Here, we have focused on the effect of the drug, methylphenidate, on lipid composition in the brain and find that it varies in a way that might affect learning and memory. We have also used NanoSIMS to measure transmitter in subregions of nanometer vesicles. Combined with other new methods to measure the content of the interior of vesicles, we have begun to investigate the details and implications of open and closed exocytosis on regulation of how the brain works.

Nyckelord: Biochemistry & Molecular Biology, Biotechnology & Applied Microbiology

Denna post skapades 2017-03-16.
CPL Pubid: 248595


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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Analytisk kemi
Institutionen för kemi och molekylärbiologi (GU)


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