摘要
目的探讨创伤后应激障碍(PTSD)模型大鼠内侧前额皮质(mPFC)磷酸化细胞外信号调节激酶1/2(pERK1/2)和c-fos的表达变化。方法将30只成年健康雄性Wistar大鼠随机分为对照组(15只)和PTSD模型组(15只),采用无连续单一应激(SPS)方法制备PTSD模型。用免疫组织化学和免疫印迹法检测mPFCpERK1/2的表达变化,RT-PCR检测c-fosmRNA表达变化。结果免疫组织化学分析显示,对照组和模型组pERK1/2阳性细胞数分别为10.4±2.07、48.8±10.08,阳性信号吸光度值分别为24.955±3.691、110.810±10.643,差异有统计学意义(P<0.01);免疫印迹分析显示,对照组和模型组pERK/2相对表达量分别为0.510±0.052和1.109±0.106,差异有统计学意义(P<0.01);RT-PCR分析结果显示,对照组和模型组c-fosmRNA相对表达分别为0.267±0.067和1.049±0.131,差异有统计学意义(P<0.01)。结论mPFCpERK1/2和c-fos表达增高,可能参与了PTSD模型大鼠的病理生理过程。
Objective To observe the changes of phosphorylated extracellular signalregulated kinase 1/2 (pERK1/2) and c-fos in the medial prefrontal cortex (mPFC) of post-traumatic stress disorder (PTSD) rats. Methods Male Wistar rats were randomly divided into control group and PTSD model group. The model group rats were exposed to the singleprolonged stress (SPS) to set up the rat PTSD model. The expression of pERK1/2 was detected using immunohistochemistry and Western blotting, and the expression of c-fos mRNA was detected using reverse transcription polymerase chain reaction (RT-PCR). Results The result of immunohistochemistry analysis showed that the number of pERK1/2-positive cells of control group and model group were 10.4±2.07 and 48.8±10.08 respectively (P〈0.01), and integral optical density were 24.955±3.691 and 110.810±10.643 respectively (P〈0.01). And Western blotting showed that relative expression quantities of pERK/β actin were 0.510±0.052 and 1.109±0.106 respectively (P〈0.01). The quantities of c-fos mRNA relative expression of control group and model group were 0.267±0.067 and 1.049±0.131 (P〈0.01). Conlusion The levels of pERK1/2 and c-fos increase significantly in mPFC of PTSD model rats. The ERK signal transduction pathway in mPFC might play an important role in the pathogenesis of PTSD.
出处
《解剖学报》
CAS
CSCD
北大核心
2010年第2期197-200,共4页
Acta Anatomica Sinica
基金
国家自然科学基金资助项目(30600341)