持续暴露于吗啡会改变脊柱NMDA受体和星球细胞表达,并加剧雌性大鼠的慢性疼痛行为
Sara V Gonçalves1,2, Stephen G Woodhams1,2, Li Li1,2
1Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom.
Pain reports
|March 14, 2024
概括
在雌性大鼠中,持续使用阿片类药物会通过改变脊髓神经生物学,使关节疼痛恶化. 这项研究发现,吗啡增加了脊髓质分裂和GluN2B受体表达,导致疼痛敏感度增加.
科学领域:
- 神经科学是一个神经科学.
- 疼痛研究 疼痛研究
- 药理学 药理学是指药理学的学科.
背景情况:
- 持续使用阿片类药物可能会对未来的疼痛感知产生负面影响,特别是在女性身上.
- 这种现象背后的脊髓神经生物学机制需要进一步研究.
研究的目的:
- 为了测试持续的阿片类药物治疗是否会加剧慢性关节疼痛,并改变脊髓背角星症和含有GluN2B的N-甲基-d-阿斯巴酸受体在雌性大鼠中.
- 在临床前模型中阐明阿片类药物诱导的疼痛恶化的神经生物学基础.
主要方法:
- 成年雌性大鼠每天两次接受皮下吗啡或盐水,在内关节单乙酸 (MIA) 注射前一周,以模拟关节疼痛.
- 疼痛行为被评估使用承重和机械脚撤回值.
- 脊髓组织被收集用于质纤维酸蛋白 (GFAP),电离结合适配分子1 (IBA1) 和GluN2B表达的西部斑点分析.
主要成果:
- 与盐水治疗对照组相比,用吗啡治疗的老鼠表现出明显加剧的疼痛行为,尽管关节损伤类似.
- 持续的吗啡治疗导致背部角表达增加的GFAP (星病) 和GluN2B,但不是IBA1 (微病).
- 这些神经生物学变化观察到不论关节疼痛模型.
结论:
- 在雌性大鼠中,持续的吗啡治疗会诱导脊髓可塑性,其特征是星化和改变GluN2B受体表达.
- 这些变化主要是背部角,导致疼痛反应加剧.
- 这些发现突出了女性阿片类药物诱导过敏症的潜在机制.
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