論文

国際誌
2021年6月

Serotonin Plays a Key Role in the Development of Opioid-Induced Hyperalgesia in Mice.

The journal of pain
  • Mika Sasaki
  • ,
  • Yoshinori Kamiya
  • ,
  • Keiko Bamba
  • ,
  • Takeshi Onishi
  • ,
  • Keiichiro Matsuda
  • ,
  • Tatsuro Kohno
  • ,
  • Miyuki Kurabe
  • ,
  • Kenta Furutani
  • ,
  • Harue Yanagimura

22
6
開始ページ
715
終了ページ
729
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jpain.2020.12.008

Opioid usage for pain therapy is limited by its undesirable clinical effects, including paradoxical hyperalgesia, also known as opioid-induced hyperalgesia (OIH). However, the mechanisms associated with the development and maintenance of OIH remain unclear. Here, we investigated the effect of serotonin inhibition by the 5-HT3 receptor antagonist, ondansetron (OND), as well as serotonin deprivation via its synthesis inhibitor para-chlorophenylalanine, on mouse OIH models, with particular focus on astrocyte activation. Co-administering of OND and morphine, in combination with serotonin depletion, inhibited mechanical hyperalgesia and astrocyte activation in the spinal dorsal horn of mouse OIH models. Although previous studies have suggested that activation of astrocytes in the spinal dorsal horn is essential for the development and maintenance of OIH, herein, treatment with carbenoxolone (CBX), a gap junction inhibitor that suppresses astrocyte activation, did not ameliorate mechanical hyperalgesia in mouse OIH models. These results indicate that serotonin in the spinal dorsal horn, and activation of the 5-HT3 receptor play essential roles in OIH induced by chronic morphine, while astrocyte activation in the spinal dorsal horn serves as a secondary effect of OIH. Our findings further suggest that serotonergic regulation in the spinal dorsal horn may be a therapeutic target of OIH. PERSPECTIVE: The current study revealed that the descending serotonergic pain-facilitatory system in the spinal dorsal horn is crucial in OIH, and that activation of astrocytes is a secondary phenotype of OIH. Our study offers new therapeutic targets for OIH and may help reduce inappropriate opioid use.

リンク情報
DOI
https://doi.org/10.1016/j.jpain.2020.12.008
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/33465503
ID情報
  • DOI : 10.1016/j.jpain.2020.12.008
  • PubMed ID : 33465503

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