L-DOPA-Induced Neurogenesis in the Hippocampus Is Mediated Through GPR143, a Distinct Mechanism of Dopamine

Yuka Kasahara, Daiki Masukawa, Kenta Kobayashi, Miwako Yamasaki, Masahiko Watanabe, Yoshio Goshima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Neurogenesis occurs in the hippocampus throughout life and is implicated in various physiological brain functions such as memory encoding and mood regulation. L-3,4-dihydroxyphenylalanine (L-DOPA) has long been believed to be an inert precursor of dopamine. Here, we show that L-DOPA and its receptor, GPR143, the gene product of ocular albinism 1, regulate neurogenesis in the dentate gyrus (DG) in a dopamine-independent manner. L-DOPA at concentrations far lower than that of dopamine promoted proliferation of neural stem and progenitor cells in wild-type mice under the inhibition of its conversion to dopamine; this effect was abolished in GPR143 gene-deficient (Gpr143-/y) mice. Hippocampal neurogenesis decreased during development and adulthood, and exacerbated depression-like behavior was observed in adult Gpr143-/y mice. Replenishment of GPR143 in the DG attenuated the impaired neurogenesis and depression-like behavior. Our findings suggest that L-DOPA through GPR143 modulates hippocampal neurogenesis, thereby playing a role in mood regulation in the hippocampus.

Original languageEnglish
Pages (from-to)215-226
Number of pages12
JournalInternational Journal of Cell Cloning
Volume40
Issue number2
DOIs
Publication statusPublished - Mar 16 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Developmental Biology
  • Cell Biology

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