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- Title
Pra-C exerts analgesic effect through inhibiting microglial activation in anterior cingulate cortex in complete Freund's adjuvant-induced mouse model.
- Authors
Su, Dan-jie; Li, Long-fei; Wang, Sai-ying; Yang, Qi; Wu, Yu-jing; Zhao, Ming-gao; Yang, Le
- Abstract
Chronic pain is highly prevalent worldwide and severely affects daily lives of patients and family members. Praeruptorin C (Pra-C) is a main active ingredient derived from Peucedanum praeruptorum Dunn, traditionally used as antibechic, anti-bronchitis and anti-hypertension drug. Here, we evaluated the effects of Pra-C in a chronic inflammatory pain mouse model induced by complete Freund's adjuvant (CFA) injection. Pra-C (3 mg/kg) treatment for just 3 days after CFA challenge relieved CFA-induced mechanical allodynia and hindpaw edema in mice. In the anterior cingulate cortex (ACC), Pra-C treatment inhibited microglia activation and reduced levels of proinflammatory cytokines, TNF-α and IL-1β, and suppressed upregulation of glutamate receptors caused by CFA injection. In addition, Pra-C attenuated neuronal hyperexcitability in ACC of CFA-injected mice. In vitro studies confirmed the analgesic effect of Pra-C was due to its inhibitory ability on microglial activation. In conclusion, Pra-C administration had a certain effect on relieving chronic pain by inhibiting microglial activation, attenuating proinflammatory cytokine releasing and regulating excitatory synaptic proteins in the ACC of the CFA-injected mice.
- Subjects
CINGULATE cortex; LABORATORY mice; ANIMAL disease models; MICROGLIA; EXPERIMENTAL arthritis; CHRONIC pain; GLUTAMATE receptors; METHYL aspartate receptors
- Publication
Molecular Pain, 2021, p1
- ISSN
1744-8069
- Publication type
Article
- DOI
10.1177/1744806921990934