摘要
目的观察葡萄籽原花青素(GSPE)对放射性脑损伤大鼠学习能力障碍的改善作用。,方法120只雄性Wistar大鼠随机分为对照组,模型组,低、高剂量GSPE组。用直线加速器进行肭部照射22Gy制作放射性脑损伤模型。HE染色观察海马区神经细胞组织形态变化;免疫组织化学法检测磷酸化细胞外信号调节激酶(ERK1/2)及再生相关困子生长相关蛋白-43(GAP-43)的表达;采用硫代巴比妥(TBA)酸比色法测定丙二醛(malonaldehyde,MDA)MDA含量,采用黄嘌呤氧化酶法测定脑组织中的超氧化物歧化酶(superoxidedismutase,SOD)活力;穿梭箱评测大鼠学习能力.、结果与模型组比较,GSPE组海马区神经细胞结构损伤减轻;磷酸化ERK1/2[(13.20±1.45)个/视野,(27.40±2.52)个/视野,(19.80±1.30)个/视野]、GAP-43[(52.93±2.07)个/视野,(66.50±0.77)个/视野,(73.05±2.40)个/视野]和SOD活性表达水平[(79.82±5.26)U/mg,(76.20±6.86)U/mg,(80.12±5.76)U/mg]增高((P〈0.05);MDA含量降低[(71.62±1.88)umol/g,(76.41±1.94)umol/g,(72.32±1.98)umoL/g](P〈0.05);穿梭箱评测显示GSPE组动物主动回避反应率明显升高[7d:(56.23±2.56)%;14d:(44.66±2.79)%;28d:(50.40±2.16)%],被动回避潜伏期缩短[7d:(34.11±1.57)S;14d:(45.52±1.88)S;28d:(39.52±1.79)S](P〈0.05);上述变化存高剂量GSPE组最为显著(P〈0.05).结论GSPE对放射性脑损伤大鼠学习能力障碍有较好的改善作州,可能与增强ERK1/2活性,促进GAP-43的表达有关。
Objective To observe the protective effect of grape seed proanthoeyanidin extract (GSPE) on learning disabilities after radiation injury brain in rats. Methods 120 male Wistar rats were divided into control group,model group, high and low dose GSPE groups. The radiation injury brain InodeIs were established using a method of linear accelerator in'adiation in 22 Gy. The morphological changes of neu- rons in hippocampus were observed with HE staining; the expression of phosphorylated extracellular signal regulated kinase 1/2 (ERK1/2) and growth associated protein-43(GAP-43) were detected by imnmnohisto- chemistry; the contents of malonalde hyde(MDA) and superoxide dismutase (SOD) were measured respec- tively by thiobarbiturie acid(TBA) and xanthine oxidation(XTO) methods; the learning ability was assessed with shuttle box. Results Compared with the model group,the GSPE groups showed a decreased degree of nerve eell morphological injury ; and increased ERKI/2 activities ( ( 13.20 ± 1.45 )/view, ( 27.40± 2.52 ) / view, ( 19.80± 1.30)/view), GAP-43 expression level( (52.93±2.07)/view, ( 66.50±0.77)/view, ( 73.05± 2.40)/view) and SOD activities((79.82±5.26) U/rag, (76.20±6.86) U/rag, (80.12±5.76) U/rag) (P〈 0.05 ) ; and deereased the contenls of MDA( ( 71.62± 1.88 ) bunol/g, ( 76.41 ± 1.94) i.unol/g, ( 72.32± 1.98 ) umoL/g) (P〈0.05).Shuttle box testing showed that the active avoidance reaction rate was increased( 7 d: (56.23±2.56) % ; 14 d: (44.66± 2.79 ) % ; 28 d: ( 50.40± 2.16 ) % ) (P〈 0.05 ) and passive avoidance latency was shorted(7 d:(34.11±1.57)s;14 d:(45.52±1.88)s;28 d:(39.52±1.79)s) (P〈0,05) in GSPE groups. The above mentioned changes were more significant in high dose of GSPE(P〈0.05). Conclusion GSPE has protective effect on learning disabilities of radiation injuries brain, which is related to enhance E1RK1/2 activity and the expression of GAP-43.
出处
《中华行为医学与脑科学杂志》
CAS
CSCD
北大核心
2016年第2期128-133,共6页
Chinese Journal of Behavioral Medicine and Brain Science
基金
河北省卫生厅资助项目(20130384)