目的探讨慢性应激状态下,以及持续给予盐酸氟西汀后,大鼠海马及前额叶部位环磷酸腺苷反应元件结合蛋白(cAMP-response element binding protein,CREB)水平和磷酸化CREB(p-CREB)表达的变化。方法成年雄性Sprague-Dawley(SD)大鼠50只随机分为三组:应激组26只,药物组12只,对照组12只。应激组与药物组大鼠均经过8周慢性应激刺激,药物组在第1周开始给予盐酸氟西汀(10mg/g,I.P.),直到8周末。8周后行糖水偏好实验和旷场实验,根据8周末糖水偏爱率将应激组大鼠分为应激敏感组和应激适应组。应激结束后将四组大鼠断头处死,采用蛋白免疫印记技术检测大鼠海马、额叶部位CREB和p-CREB水平。结果 8周末应激敏感组糖水偏爱率低于应激适应组、药物组及对照组(均P<0.05);应激敏感组的跨格次数、中心格时间和直立次数低于药物组和对照组(均P<0.05),与应激适应组无统计学差异(均P>0.05)。应激敏感组海马及前额叶中p-CREB水平明显低于应激适应组、药物组及对照组(均P<0.05);四组大鼠海马部位、前额叶CREB表达水平无明显差异。结论海马和额叶部位CREB磷酸化水平可能与应激导致的情绪障碍发生机制相关。
Neuroimmune system may be involved in the pathological process of bipolar disorder(BD),but the essential association is not fully understood.Accumulating evidence has shown that BD involves the activation of immune cells and the release of inflammatory substances in the central nerve system(CNS).Meanwhile,neuroimmune responses also interact with other hypothesis of the etiology of BD that are widely recognized,such as neurotransmitter systems,neuroendocrine systems,neurotrophic factors,and oxidative stress.Simultaneously,related genes and immune changes in peripheral blood vary with it.Overall,neuroimmunity may play an important role in the pathogenesis of BD,and the inflammatory cytokines,especially interleukin-6 and tumor necrosis factor-alpha,have potential value for the clinical diagnosis and prognosis of BD,as well as predicting the therapeutic effects of drugs.Large-scale studies are needed to extend the evidence on neuroimmunity in BD,and to examine its clinical value for applications such as early prediction and treatment.
