大鼠束缚后脑内Fos蛋白的表达

目的探讨大鼠束缚后对大鼠脑内Fos蛋白表达的影响。方法将大鼠束缚于小的塑料桶内1、3或6h，于解束后30min处死，脑组织进行Fos蛋白免疫组织化学染色。结果Fos阳性神经元表达于1．前脑：扣带回、新皮质(尤其是第3和5层)、外侧隔核、杏仁中央核；2．间脑：下丘脑视前区、下丘脑外侧区、视上核、室旁核、第三脑室室周区、弓状核、丘脑室旁核、外侧膝状体、内侧膝状体；3．脑干：中脑的上丘视性层、中脑导水管周围灰质、下丘的皮质部；脑桥的臂旁外侧核、蓝斑、A5区；延髓的耳蜗核、延髓内脏带(MVZ)等处。Fos表达的时问规律是束缚1h最高，3h次之，6h最少。结论大鼠被束缚后全脑多处核团的神经元发生不同程度的Fos反应，随着束缚时间的延长，动物产生适应性，Fos表达减少。

EXPRESSION OF Fos PROTEIN IN RAT BRAINS FOLLOWING RESTRAINT STRESS

Objective To investigate expression of Fos protein in rat brains following restraint stress. Methods The experimental rats were restrained in a small plastic tub for,1,3 and 6 hours,and were sacrificed at 30 min after removing restraint.Immunohistochemical ABC method was used to observe distribution of Fos protein-like immunoreactive(-LI)products in rats brain.Results Fos-LI neurons appeared in (1)Frontal brain:the cingulum,cortex(especially in third and fifth layer),lateral septal nucleus,central amygdaloid nucleus.(2)Diencephalon:the thalamic paraventricular nucleus,lateral geniculate body and medial genicular body,hypothalamic paraventricular nucleus,supraoptic nucleus,periventricular area of third ventricle,arcuate nucleus.(3)Brain stem:the superficial layer of superior colliculus,periaqueductal gray,cortical area of inferior colliculus,lateral parabrachial nucleus,locus coeruleus,A5 area,cochlear nuclei,medullary viceral zone in medulla oblongata.The expression of Fos-LI neurons peaked in rats restrained for 1h,at 3h,then began to decrease,at 6h,significantly decreased. Conclusion Fos-LI neurons appeared in many areas of brain induced with restraint stress.The number of Fos-LI neurons decreased following restraint time.