Effect of long-term exposure of SH-SY5Y cells to morphine: a whole cell proteomic analysis.
BACKGROUND
Opiate addiction reflects plastic changes that endurably alter synaptic transmission within relevant neuronal circuits. The biochemical mechanisms of these adaptations remain largely unknown and proteomics-based approaches could lead to a broad characterization of the molecular events underlying adaptations to chronic drug exposure.


RESULTS
Thus, we have started proteomic analyses of the effects of chronic morphine exposure in a recombinant human neuroblastoma SH-SY5Y clone that stably overexpresses the mu-opioid receptor. Cells were treated with morphine for 6, 24 and 72 hours, the proteins were separated by 2-D gel electrophoresis and stained with Coomassie blue, and the protein map was compared with that obtained from untreated cells. Spots showing a statistically significant variation were selected for identification using mass spectrometric analyses.


CONCLUSIONS
A total of 45 proteins were identified, including proteins involved in cellular metabolism, cytoskeleton organization, vesicular trafficking, transcriptional and translational regulation, and cell signaling.
Neasta
Jérémie
J
Unité Mécanismes d'action des substances opioïdes, Institut de Pharmacologie et de Biologie Structurale, Centre National de la Recherche Scientifique UMR 5089, 205 route de Narbonne, 31077 Toulouse cedex 04, France. neasta@ipbs.fr
Uttenweiler-Joseph
Sandrine
S
Chaoui
Karima
K
Monsarrat
Bernard
B
Meunier
Jean-Claude
JC
Moulédous
Lionel
L