一种轻型脑损伤后大鼠海马EP2的表达变化
Experimental Study on Changes of EP2 Expression in the Hippocampus of Rats after Mild Brain Injury
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摘要: 目的 研究单纯性脑震荡(pure cerebral concussion,PCC)大鼠脑内海马EP2受体的阳性表达及其变化,探讨EP2在脑损伤病理变化中的角色.方法 应用金属单摆脑损伤打击装置制作大鼠PCC模型,多克隆EP2抗体(兔)进行免疫组织化学染色,观察正常对照组(n=5)及PCC后3 h、12 h、1 d、2 d、3 d、7 d组(n=5)大鼠海马CA1~4区和上、下齿状回EP2阳性表达的平均光密度值及阳性细胞计数情况.结果 正常生理状态下EP2表达较少,PCC后3 h免疫阳性开始增强,其表达小高峰出现在3 d组(P<0.05),随后7 d组下调.结论 PCC损伤早期EP2受体与PCC致伤后发生的病理变化有密切相关性.Abstract: Objective To explore the role of EP2 receptor in pathological changes of brain injury by investigating the positive expression and changes of EP2 in rat hippocampus brain regions after pure cerebral concussion( PCC). Methods The PCC rats models were established by using a self-made metal pendulum-striker concussive device. To observe the postive expression of EP2 receptor with optical density and cell count changes in CA1-4, up and down the dentate gyrus brain regins,the rats were randomly divided into 3 h, 12 h, 1 d, 2 d, 3 d and 7 d six groups(n=5) after PCC and one normal group(n=5) was used as the control.The immunohistochemistry(SP method) was used with anti-EP2 rabbit polyclonal antibody. Results The results showed that EP2 receptor immunoreactivity was lightly observed in normal group. The expression of EP2 receptor showed a significant upward trend at 3 h after PCC, peak expression appeared in 3 d group(P<0.05)and showed a downward trend in 7 d group. Conclusion The EP2 receptor induced by PCC is closely related to the pathological changes after PCC injury.
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Key words:
- Mild brain injury /
- Pure cerebral concussion /
- Hippocampus /
- EP2 receptor /
- Rat
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[1]匡永勤,贺伟旗,顾建文,等.地震所致颅脑损伤的诊治特点[J].西部医学,2008,20(5):945-946. [2] [2]KOEHANEK P M,CLARK R S,RUPPEL R A,et al.Biochemical,cellular,and molecular mechanisms in the evolution of secondary damage after severe traumatic brain injury in infants and children:Lessons learned from the bedside[J].Pediatr Crit Care Med,2000,1(1):4-19. [3] [3]VILLOSLADA P,GENAIN C P.Role of nerve growth factor and other trophic factors in brain Inflam mation[J].Progress in Brain Research,2004,146(1):403-414. [4] [4]TRIVEDI P P,JENA G B.Dextran sulfate sodium-induced ulcerative colitis leads to increased hematopoiesis and induces both local as well as systemic genotoxicity in mice[J].Mutation Research,2012,744(2):172-183. [5] [5]INADA T,ARAI K,KAWAMURA M,et a1.Contribution of the prostaglandin E2/E-prostanoid 2 receptor signaling path way in abscess formation in rat zymosan-induced pleurisy[J].J Pharmacology&Experimental Therapeutics,2009,331(3):860-870. [6] [6]JIANG J,QUAN Y,GANESH T,et al.Inhibition of the prostaglandin receptor EP2 following status epilepticus reduces delayed mortality and brain inflammation[J].Proc Natl Acad Sci,2013,110(9):3591-3596. [7]于建云,李俊祥,郭泽云,等.实验大鼠轻中型闭合性脑损伤分级的昏迷指数与量化标准研究[J].法医学杂志,2008,24(1):8-11. [8]于建云,李俊祥,李娟娟,等.三重脑震荡鼠模型建立及组织病理学动态改变观察[J].中华神经外科疾病研究杂志,2010,9(4):337-340. [9] [9]MANABU NEGISHI,YUKIHIKO SUGIMOTO,ATSUSHI ICHIKAWA.Prostanoid receptors and their biological actions[J].Prog Lipid Res,1993,32(4):417-434. [10]王嘉南,康丽,赵龙,等.单纯性脑震荡大鼠海马m PGES-1的表达[J].神经解剖学杂志,2013,29(6):666-670. [11] [11]YUHKI K,UENO A,NARABA H,et al.Prostaglandin receptors EP2,EP3,and IP mediate exudate formation in carrageenin-induced mouse pleurisy[J].Pharmacology,2004,311(3):1218-1224. [12] [12]BISWAS S,BHATTACHERJEE P,PATERSON C A,et al.Ocular inflammatory responses in the EP2 and EP4 receptor knockout mice[J].Ocular Immunology Inflammation,2009,14(3):157-163. [13] [13] MCCULLOUGH L,WU L,HAUGHEY N,et al.Neuroprotective function of the PGE2 EP2 receptor in cerebral ischemia[J].J Neurosci,2004,24(1):257-268. [14] [14]ZASLONA Z,SEREZANI C H,OKUNISHI K,et al.Prostaglandin E2 restrains macrophage maturation via E prostanoid receptor 2/protein kinase A signaling[J].Blood,2012,119(10):2358-2367. [15] [15]HARTNEY J M,COGGINS K G,TILLEY S L.Prostaglandin E2 protects lower airways against Bronchoconstrictlon[J].Unesco,1978,290(1):105-1I3. [16] [16]MCCULLOUGH L,WU L,HAUGHEY N,et al.Neuroprotective function of the PGE2 EP2 receptor in cerebral ischemia[J].J Neuroscience,2004,24(1):257-268. [17]郭丽萍,兰光明,于建云,等.实验性脑震荡对大鼠平衡功能和运动学习能力的影响[J].中国行为医学科学,2006,15(5):417-419. [18] [19]CHEN C,BAZAN,NG.Endogenous PGE2 regulates membrane excitability and synaptic transmission in hippocampal CA1 pyramidal neurons[J].J Neurophysiol,2005,93(2):929-941.
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