Mouse strain specificity of DAAO inhibitors-mediated antinociception.

Abstract

D-Amino acid oxidase (DAAO) specifically catalyzes the oxidative deamination of neutral and polar D-amino acids and finally yields byproducts of hydrogen peroxide. Our previous work demonstrated that the spinal astroglial DAAO/hydrogen peroxide (H2 O2 ) pathway was involved in the process of pain and morphine antinociceptive tolerance. This study aimed to report mouse strain specificity of DAAO inhibitors on antinociception and explore its possible mechanism. DAAO inhibitors benzoic acid, CBIO, and SUN significantly inhibited formalin-induced tonic pain in Balb/c and Swiss mice, but had no antinociceptive effect in C57 mice. In contrast, morphine and gabapentin inhibited formalin-induced tonic pain by the same degrees among Swiss, Balb/c and C57 mice. Therefore, mouse strain difference in antinociceptive effects was DAAO inhibitors specific. In addition, intrathecal injection of D-serine greatly increased spinal H2 O2 levels by 80.0% and 56.9% in Swiss and Balb/c mice respectively, but reduced spinal H2 O2 levels by 29.0% in C57 mice. However, there was no remarkable difference in spinal DAAO activities among Swiss, Balb/c and C57 mice. The spinal expression of glutathione (GSH) and glutathione peroxidase (GPx) activity in C57 mice were significantly higher than Swiss and Balb/c mice. Furthermore, the specific GPx inhibitor D-penicillamine distinctly restored SUN antinociception in C57 mice. Our results reported that DAAO inhibitors produced antinociception in a strain-dependent manner in mice and the strain specificity might be associated with the difference in spinal GSH and GPx activity.

• Authors: Hao Liu, Yu-Cong Zhou, Zi-Ying Wang, Nian Gong, Jin-Miao Lu, eVhy Apryani, Qiao-Qiao Han, Yong-Xiang Wang, Mei-Xian Ou
• Journal: Pharmacology research & perspectives (Pharmacol Res Perspect) Vol. 9 Issue 2 Pg. e00727 (04 2021) ISSN: 2052-1707 [Electronic] United States
• PMID: 33710781 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2021 The Authors. Pharmacology Research & Perspectives published by John Wiley & Sons Ltd, British Pharmacological Society and American Society for Pharmacology and Experimental Therapeutics.

Chemical References

• Analgesics
• Glutathione Peroxidase
• Dao1 protein, mouse
• D-Amino-Acid Oxidase
• Glutathione

Topics

• Analgesics (administration & dosage, pharmacokinetics)
• Animals
• Biological Variation, Population
• D-Amino-Acid Oxidase (antagonists & inhibitors, metabolism)
• Glutathione (analysis, metabolism)
• Glutathione Peroxidase (analysis, metabolism)
• Male
• Mice
• Mice, Inbred BALB C
• Mice, Inbred C57BL
• Nociception (drug effects)
• Spinal Cord (drug effects, metabolism)