4.8 Article

Sequencing the serotonergic neuron translatome reveals a new role for Fkbp5 in stress

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MOLECULAR PSYCHIATRY
卷 26, 期 9, 页码 4742-4753

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SPRINGERNATURE
DOI: 10.1038/s41380-020-0750-4

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  1. [P50 MH106428]

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Research has found that stress leads to upregulation of Fkbp5 mRNA in male and female mice, and pretreatment with a selective FKBP51 inhibitor can reduce stress-induced anhedonia. This suggests that FKBP51 may play an important role in integrating circulating stress hormones and serotonergic regulation of stress responses.
Serotonin is a key mediator of stress, anxiety, and depression, and novel therapeutic targets within serotonin neurons are needed to combat these disorders. To determine how stress alters the translational profile of serotonin neurons, we sequenced ribosome-associated RNA from these neurons after repeated stress in male and female mice. We identified numerous sex- and stress-regulated genes. In particular, Fkbp5 mRNA, which codes for the glucocorticoid receptor co-chaperone protein FKBP51, was consistently upregulated in male and female mice following stress. Pretreatment with a selective FKBP51 inhibitor into the dorsal raphe prior to repeated forced swim stress decreased resulting stress-induced anhedonia. Our results support previous findings linking FKBP51 to stress-related disorders and provide the first evidence suggesting that FKBP51 function may be an important regulatory node integrating circulating stress hormones and serotonergic regulation of stress responses.

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