Abstract:
:Cytokine-dependent mechanisms in the CNS have been implicated in the pathogenesis of depression. Interleukin-6 is upregulated in depressed patients and dowregulated by antidepressants. It is, however, unknown whether IL-6 is involved in the pathogenesis of depression. We subjected IL-6-deficient mice (IL-6(-/-)) to depression-related tests (learned helplessness, forced swimming, tail suspension, sucrose preference). We also investigated IL-6 in the hippocampus of stressed wild-type mice. IL-6(-/-) mice showed reduced despair in the forced swim, and tail suspension test, and enhanced hedonic behavior. Moreover, IL-6(-/-) mice exhibited resistance to helplessness. This resistance may be caused by the lack of IL-6, because stress increased IL-6 expression in wild-type hippocampi. This suggests that IL-6 is a component in molecular mechanisms in the pathogenesis of depression. IL-6(-/-) mice represent tools to study IL-6-dependent signaling pathways in the pathophysiology of depression in vivo. Moreover, these mice may support the screening of compounds for depression by altering cytokine-mediated signaling.
journal_name
Neurobiol Disjournal_title
Neurobiology of diseaseauthors
Chourbaji S,Urani A,Inta I,Sanchis-Segura C,Brandwein C,Zink M,Schwaninger M,Gass Pdoi
10.1016/j.nbd.2006.05.001subject
Has Abstractpub_date
2006-09-01 00:00:00pages
587-94issue
3eissn
0969-9961issn
1095-953Xpii
S0969-9961(06)00115-Xjournal_volume
23pub_type
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