Journal Article Roles of 5-HT1A receptor in the expression of AMPA receptor and BDNF in developing mouse cortical neurons

Yoshimura, Yuko  ,  Ishikawa, Chihiro  ,  Kasegai, Haruki  ,  Masuda, Tomoyuki  ,  Yoshikawa, Masaaki  ,  Shiga, Takashi

115pp.13 - 20 , 2017-02 , Elsevier
The possible interactions between serotonergic and glutamatergic systems during neural development and under the pathogenesis of depression remain unclear. We now investigated roles of 5-HT1A receptor in the mRNA expression of AMPA receptor subunits (GluR1 and GluR2) and brain-derived neurotrophic factor (BDNF) using primary culture of cerebral cortex of mouse embryos. Neurons at embryonic day 18 were cultured for 3 days or 14 days and then treated with 5-HT1A receptor agonist (8-OH-DPAT) for 3 h or 24 h. In neurons cultured for 3 days, 8-OH-DPAT treatment for both 3 h and 24 h increased the mRNA levels of BDNF and GluR1, but not GluR2. In neurons cultured for 14 days, however, 8-OH-DPAT had no effects on these mRNA levels. Next, we examined in vivo roles of 5-HT1A receptor by administration of 8-OH-DPAT to newborn mice. Twenty-four hours after the oral administration of 8-OH-DPAT, the mRNA expression of BDNF was decreased in the frontal cortex, but had no effects on the mRNA expression of GluR1 and GluR2. Taken together, the present study suggests that 5-HT1A receptor activation modulates mRNA expression of AMPA receptor subunit and BDNF in cortical neurons, and the effects are different between in vitro and in vivo.

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