Balance between cAMP and Ca2+ signals regulates expression levels of pituitary adenylate cyclase-activating polypeptide gene in neurons

Mamoru Fukuchi*, Yuki Kuwana, Akiko Tabuchi, Masaaki Tsuda

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

8 被引用数 (Scopus)

抄録

Mice lacking the gene encoding pituitary adenylate cyclase-activating polypeptide (PACAP) or its specific receptor, PAC1, show abnormal behaviors related to schizophrenia. However, the regulation of PACAP expression in neurons remains unclear. Here, we report that Pacap mRNA levels are regulated transcriptionally and post-transcriptionally by cAMP and Ca2+ signals in cultured rat cortical cells. Pacap mRNA levels decreased proportionately with the intensity of cAMP signaling, and this decrease was accelerated by N-methyl-D-aspartate (NMDA) receptor blockade, suggesting that cAMP signaling enhances the degradation of Pacap mRNA, whereas NMDA receptor-mediated signals inhibit its degradation. However, depolarization (which produced a robust increase in Ca2+ signals) together with cAMP signaling resulted in a synergistic induction of Pacap mRNA through calcineurin and its substrate, cAMP-response element-binding protein (CREB)-regulated transcription coactivator 1. These results strongly support the concept that while cAMP signaling can accelerate the degradation of Pacap mRNA, it can also synergistically enhance Ca2+ signaling-induced transcriptional activation of Pacap. Taken together, our findings suggest that a balance between Ca2+ and cAMP signals regulates PACAP levels in neurons and that a perturbation of this balance may result in psychiatric disorders, such as schizophrenia.

本文言語英語
ページ(範囲)921-929
ページ数9
ジャーナルGenes to Cells
21
8
DOI
出版ステータス出版済み - 2016/08/01

ASJC Scopus 主題領域

  • 遺伝学
  • 細胞生物学

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