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Liquid Extraction Surface Analysis (LESA) Electron-Induced Dissociation and Collision-Induced Dissociation Mass Spectrometry of Small Molecule Drug Compounds.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Lopez-Clavijo, Andrea F 
Griffiths, Rian L 
Goodwin, Richard JA 

Abstract

Here, we present liquid extraction surface analysis (LESA) coupled with electron-induced dissociation (EID) mass spectrometry in a Fourier-transform ion cyclotron resonance mass spectrometer for the analysis of small organic pharmaceutical compounds directly from dosed tissue. First, the direct infusion electrospray ionisation EID and collision-induced dissociation (CID) behaviour of erlotinib, moxifloxacin, clozapine and olanzapine standards were compared. EID mass spectra were also compared with experimental or reference electron impact ionisation mass spectra. The results show that (with the exception of erlotinib) EID and CID result in complementary fragment ions. Subsequently, we performed LESA EID MS/MS and LESA CID MS/MS on singly charged ions of moxifloxacin and erlotinib extracted from a thin tissue section of rat kidney from a cassette-dosed animal. Both techniques provided structural information, with the majority of peaks observed for the drug standards also observed for the tissue-extracted species. Overall, these results demonstrate the feasibility of LESA EID MS/MS of drug compounds from dosed tissue and extend the number of molecular structures for which EID behaviour has been determined. Graphical Abstract ᅟ.

Description

Keywords

CID, Collision-induced dissociation, Drug compounds, EI, EID, Electron ionisation, Electron-induced dissociation, LESA, Liquid extraction surface analysis, Small molecules dissociation, Animals, Kidney, Liquid-Liquid Extraction, Male, Pharmaceutical Preparations, Pharmacokinetics, Rats, Rats, Wistar, Surface Properties, Tandem Mass Spectrometry

Journal Title

J Am Soc Mass Spectrom

Conference Name

Journal ISSN

1044-0305
1879-1123

Volume Title

29

Publisher

American Chemical Society (ACS)