Casarotto, Plinio C. and Girych, Mykhailo and Fred, Senem M. and Kovaleva, Vera and Moliner, Rafael and Enkavi, Giray and Biojone, Caroline and Cannarozzo, Cecilia and Sahu, Madhusmita Pryiadrashini and Kaurinkoski, Katja and Brunello, Cecilia A. and Steinzeig, Anna and Winkel, Frederike and Patil, Sudarshan and Vestring, Stefan and Serchov, Tsvetan and Diniz, Cassiano R. A. F. and Laukkanen, Liina and Cardon, Iseline and Antila, Hanna and Rog, Tomasz and Piepponen, Timo Petteri and Bramham, Clive R. and Normann, Claus and Lauri, Sari E. and Saarma, Mart and Vattulainen, Ilpo and Castren, Eero (2021) Antidepressant drugs act by directly binding to TRKB neurotrophin receptors. CELL, 184 (5). 1299-+. ISSN 0092-8674, 1097-4172
Full text not available from this repository. (Request a copy)Abstract
It is unclear how binding of antidepressant drugs to their targets gives rise to the clinical antidepressant effect. We discovered that the transmembrane domain of tyrosine kinase receptor 2 (TRKB), the brain-derived neurotrophic factor (BDNF) receptor that promotes neuronal plasticity and antidepressant responses, has a cholesterol-sensing function that mediates synaptic effects of cholesterol. We then found that both typical and fast-acting antidepressants directly bind to TRKB, thereby facilitating synaptic localization of TRKB and its activation by BDNF. Extensive computational approaches including atomistic molecular dynamics simulations revealed a binding site at the transmembrane region of TRKB dimers. Mutation of the TRKB antidepressant-binding motif impaired cellular, behavioral, and plasticity-promoting responses to antidepressants in vitro and in vivo. We suggest that binding to TRKB and allosteric facilitation of BDNF signaling is the common mechanism for antidepressant action, which may explain why typical antidepressants act slowly and how molecular effects of antidepressants are translated into clinical mood recovery.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Psychiatrie und Psychotherapie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Oct 2022 06:34 |
| Last Modified: | 04 Oct 2022 06:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48175 |
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