Dexmedetomidine alleviates nerve injury induced by propofol in neonatal rats
10.16352/j.issn.1001-6325.2025.05.0644
- VernacularTitle:右美托咪定减轻丙泊酚诱导的新生大鼠神经损伤
- Author:
Fangling ZHANG
1
;
Yuanfang ZHANG
;
Li ZHANG
Author Information
1. 陕西省结核病防治院麻醉科,陕西西安 710000
- Keywords:
dexmedetomidine;
neuroinflammation;
neuron apoptosis;
propofol;
nerve injury
- From:
Basic & Clinical Medicine
2025;45(5):644-650
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of dexmedetomidine(Dex)on propofol-induced nerve injury in neo-natal rats.Methods The rats were divided into control group,intra-peritoneally injected propofol to construct nerve injury model group(50 mg/kg),Low,medium and high dose dexmedetomidine intervention model groups(Dex-L,Dex-M and Dex-H with femoral vein injection of 0.25,0.5 and 1 μg/kg Dex,respectively),and Dex-H+anti-BDNF(10 0μg/kg)group,with 12 animals in each group.The neurological deficit score,number of platform jumping errors,and changes in brain index were detected in rats.HE staining microscopy was applied to measure pathology in the hippocampal CA1 region.ELISA was applied to detect level of interleukin-6(IL-6),monocyte chemotactic protein-1(MCP-1)and tumor necrosis factor-α(TNF-α)in the hippocampal CA1 region.TUNEL staining microscopy was used to measure neuronal apoptosis in the hippocampal CA1 region.Western blot was ap-plied to measure the cleaved caspase-3,proBDNF,mature brain-derived neurotrophic factor(mBDNF),phospho-rylated tyrosine kinase B(p-TrkB),and phosphorylated phosphatidylinositol 3 kinase(p-PI3K)proteins in the hippocampal CA1 region.Results Compared with model group,the neuronal damage in rats was improved in Dex-L group,Dex-M group,and Dex-H group,the neurological deficit score,number of platform jumping errors,brain index,level of IL-6,MCP-1,TNF-α in hippocampal CA1 region,neuronal apoptosis rate,and level of cleaved caspase-3 and pro BDNF proteins all reduced,mBDNF,p-TrkB,and p-PI3K proteins in the hippocampal CA1 re-gion raised(P＜0.05).Anti-BDNF inhibited the effect of 1 μg/kg Dex pretreatment on propofol induced nerve inju-ry in neonatal rats.Conclusions Dex pretreatment inhibits neuro-inflammation and neuronal apoptosis,thereby re-duces propofol induced nerve injury in neonatal rats.Its mechanism may be related to the activation of the mBDNF/TrkB/PI3K pathway.
