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Proteomic response of human neuroblastoma cells to azaspiracid-1.

Authors :
Kellmann R
Schaffner CA
Grønset TA
Satake M
Ziegler M
Fladmark KE
Source :
Journal of proteomics [J Proteomics] 2009 May 02; Vol. 72 (4), pp. 695-707. Date of Electronic Publication: 2009 Mar 05.
Publication Year :
2009

Abstract

Azaspiracid-1 is a novel algal toxin, which causes an instantaneous rise of intracellular messengers, and an irreversible disarrangement of the actin cytoskeleton. Little is known regarding the molecular mechanisms that are involved in azaspiracid-1 toxicity. This study investigated global changes in protein expression by stable-isotope labelling with amino acids in culture and mass spectrometry, following exposure of human neuroblastoma cells to azaspiracid-1. The most highly upregulated proteins were involved in cellular energy metabolism, followed by cytoskeleton regulating proteins. The majority of downregulated proteins were involved in transcription, translation and protein modification. In addition, two proteins, component of oligomeric Golgi complex 5 and ras-related protein RAB1, which are involved in the maintenance of the Golgi complex and vesicle transport, respectively, were downregulated. Electron microscopy revealed a disruption of the Golgi complex by azaspiracid-1, and an accumulation of vesicles. In this study, the differential protein expression was examined prior to changes of the cytoskeleton structure in order to capture the primary effects of azaspiracid-1, however the observed changes were of unexpected complexity. Azaspiracid-1 caused a pronounced, but temporary depletion of ATP, which may be the reason for the observed complexity of cellular changes.

Details

Language :
English
ISSN :
1876-7737
Volume :
72
Issue :
4
Database :
MEDLINE
Journal :
Journal of proteomics
Publication Type :
Academic Journal
Accession number :
19269354
Full Text :
https://doi.org/10.1016/j.jprot.2009.02.008