Abstract:
:Psychotropic medications target glycogen synthase kinase 3β (GSK3β), but the functional integration with other factors relevant for drug efficacy is poorly understood. We discovered that the suggested psychiatric risk factor FK506 binding protein 51 (FKBP51) increases phosphorylation of GSK3β at serine 9 (pGSK3β(S9)). FKBP51 associates with GSK3β mainly through its FK1 domain; furthermore, it also changes GSK3β's heterocomplex assembly by associating with the phosphatase PP2A and the kinase cyclin-dependent kinase 5. FKBP51 acts through GSK3β on the downstream targets Tau, β-catenin and T-cell factor/lymphoid enhancing factor (TCF/LEF). Lithium and the antidepressant (AD) paroxetine (PAR) functionally synergize with FKBP51, as revealed by reporter gene and protein association analyses. Deletion of FKBP51 blunted the PAR- or lithium-induced increase in pGSK3β(S9) in cells and mice and attenuated the behavioral effects of lithium treatment. Clinical improvement in depressive patients was predicted by baseline GSK3β pathway activity and by pGSK3β(S9) reactivity to ex vivo treatment of peripheral blood mononuclear lymphocytes with lithium or PAR. In sum, FKBP51-directed GSK3β activity contributes to the action of psychotropic medications. Components of the FKBP51-GSK3β pathway may be useful as biomarkers predicting AD response and as targets for the development of novel ADs.
journal_name
Mol Psychiatryjournal_title
Molecular psychiatryauthors
Gassen NC,Hartmann J,Zannas AS,Kretzschmar A,Zschocke J,Maccarrone G,Hafner K,Zellner A,Kollmannsberger LK,Wagner KV,Mehta D,Kloiber S,Turck CW,Lucae S,Chrousos GP,Holsboer F,Binder EB,Ising M,Schmidt MV,Rein Tdoi
10.1038/mp.2015.38subject
Has Abstractpub_date
2016-02-01 00:00:00pages
277-89issue
2eissn
1359-4184issn
1476-5578pii
mp201538journal_volume
21pub_type
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