Serotonin receptor expression along the dorsal-ventral axis of mouse hippocampus

Kenji F. Tanaka, Benjamin Adam Samuels, René Hen

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

Using in situ hybridization, we describe, for the first time, the profiles of expression of serotonin receptors (Htr/5-HTR) along the dorsal-ventral axis of mouse hippocampus. cRNA probes for most Htrs, excluding Htr6, were used. All hippocampal subregions and the entorhinal cortex cells providing input into the hippocampus were examined. The study shows that some, but not all, Htrs are expressed in the cells of the hippocampal circuitry. At both the subfield and the cell type levels, a somewhat overlapping pattern is observed. Four serotonin receptors, Htr1a, Htr2a, Htr2c and Htr7, display an expression pattern that changes along the dorsal-ventral axis of the hippocampus. Given the proposed functional differentiation of the hippocampus along its long axis, with the dorsal pole more involved in cognitive functions and the ventral pole more involved in mood and anxiety, our results suggest that serotonin receptors enriched in the ventral pole probably contribute to mood- and anxiety-related behaviours.

Original languageEnglish
Pages (from-to)2395-2401
Number of pages7
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Volume367
Issue number1601
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Antidepressant
  • Hippocampus
  • Serotonin

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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