Candidate hippocampal biomarkers of susceptibility and resilience to stress in a rat model of depression

Kim Henningsen, Johan Palmfeldt, Sofie Friis Christiansen, Isabel Baiges, Steffen Bak, Ole Nørregaard Jensen, Niels Gregersen, Ove Wiborg

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

Susceptibility to stress plays a crucial role in the development of psychiatric disorders such as unipolar depression and post-traumatic stress disorder. In the present study the chronic mild stress rat model of depression was used to reveal stress-susceptible and stress-resilient rats. Large-scale proteomics was used to map hippocampal protein alterations in different stress states. Membrane proteins were successfully captured by two-phase separation and peptide based proteomics. Using iTRAQ labeling coupled with mass spectrometry, more than 2000 proteins were quantified and 73 proteins were found to be differentially expressed. Stress susceptibility was associated with increased expression of a sodium-channel protein (SCN9A) currently investigated as a potential antidepressant target. Differential protein profiling also indicated stress susceptibility to be associated with deficits in synaptic vesicle release involving SNCA, SYN-1, and AP-3. Our results indicate that increased oxidative phosphorylation (COX5A, NDUFB7, NDUFS8, COX5B, and UQCRB) within the hippocampal CA regions is part of a stress-protection mechanism.
OriginalsprogEngelsk
TidsskriftMolecular and Cellular Proteomics
Vol/bind11
Udgave nummer7
Sider (fra-til)M111.016428
ISSN1535-9476
DOI
StatusUdgivet - 2012

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