Abstract:
:Selective serotonin reuptake inhibitors (SSRIs) are widely used antidepressants, but the mechanisms by which they influence behavior are only partially resolved. Adult hippocampal neurogenesis is necessary for some of the responses to SSRIs, but it is not known whether mature dentate gyrus granule cells (DG GCs) also contribute. We deleted the serotonin 1A receptor (5HT1AR, a receptor required for the SSRI response) specifically from DG GCs and found that the effects of the SSRI fluoxetine on behavior and the hypothalamic-pituitary-adrenal (HPA) axis were abolished. By contrast, mice lacking 5HT1ARs only in young adult-born GCs (abGCs) showed normal fluoxetine responses. Notably, 5HT1AR-deficient mice engineered to express functional 5HT1ARs only in DG GCs responded to fluoxetine, indicating that 5HT1ARs in DG GCs are sufficient to mediate an antidepressant response. Taken together, these data indicate that both mature DG GCs and young abGCs must be engaged for an antidepressant response.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Samuels BA,Anacker C,Hu A,Levinstein MR,Pickenhagen A,Tsetsenis T,Madroñal N,Donaldson ZR,Drew LJ,Dranovsky A,Gross CT,Tanaka KF,Hen Rdoi
10.1038/nn.4116subject
Has Abstractpub_date
2015-11-01 00:00:00pages
1606-16issue
11eissn
1097-6256issn
1546-1726pii
nn.4116journal_volume
18pub_type
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