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运动训练对血管性痴呆大鼠海马β淀粉样蛋白及β分泌酶的影响 被引量:3

Effect of exercise training on amyloid-beta peptide and β-secretase in the hippocampus of the rats with vascular dementia
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摘要 目的研究运动训练对血管性痴呆(VD)大鼠海马β-淀粉样多肽(A13)及B分泌酶(BACE)的影响。方法将30只SD大鼠数字随机表分为运动组,模型组和假手术组,采用结扎双侧颈总动脉法制做VD大鼠模型,术后4周后行水迷宫检测评估大鼠学习记忆能力.采用免疫组化技术检测大鼠海马Aβ,BACE表达。结果Morris水迷宫实验中,模型组学习记能力下降,逃避潜伏期[分别为(101.34±19.67)S,(95.42±23.89)S,(89.39±22.67)s,(90.12±19.77)s]明显长于假手术组[对应为(62.13±11.38)S,(24.84±13.69)S,(16.98±12.51)S,(11.41±8.93)S](P〈0.05),运动组较模型组学习记能力增强[对应为(80.15±21.56)S,(51.24±20.91)S,(43.78±22.36)S,(45.67±20.87)s],差异有统计学意义(P〈0.05)。运动组大鼠海马Aβ灰度值(130.12±19.01),模型动组为(116.77±23.67),假手术组为(148.44±17.67),各组之间差异有统计学意义(P〈0,05)。运动组大鼠海马BACE灰度值(131.21±25.25),模型组为(120.53±10.21),假手术组为(162.38±28.11),各组之间差异有统计学意义(P〈0.05)。结论运动训练可下调VD大鼠海马BACE及A13的表达,进而改善VD大鼠学习记忆能力。 Objective To study the effect of exercise training on 13-amyloid polypeptide (Aβ) and β- secretase(BACE) in the hippocampus of the rats with vascular dementia (VD). Methods 30 Sprague-Dawley ( SD ) rats were carried out to an exercise group (n = 10 ) , a model group (n = 10 ) , and a sham-operation group ( n = 10). VD rat models were made by the ligation of bilateral common carotid arteries. Morris water maze test were carried out 4 weeks after the operation to assess the ability in learning and memory of the rats and Aβ and β-secretase (BACE) expression was detected in the hippocampus of the rats using immunohistochemical techniques. Results In the Morris water maze test, the model group showed reduction in the learning and memorizing ability, with obvious longer escape latencies ( ( 101.34 ± 19.67 ) s, (95.42 ± 23.89 ) s, ( 89.39± 22.67 ) s, ( 90.12 ± 19. 77) s,respective-ly) than that of sham-operation group ( (62.13 ± 11.38)s, (24.84 ± 13.69) s, ( 16.98 ± 12.51 ) s, (11.41 ~ 8.93 )s, correspond-dingly) (P 〈 0.05 ), and the exercise group was improved in the learning and memorizing ability ( corresponding to ( 80.15 ± 21.56) s, ( 51.24 ± 20.91 ) s, (43.78 ±22.36) s, (45.67± 20.87 ) s ), compared with the model group(P 〈 0.05). The grey values of A[5 in the hippocampus of the rats for the exercise group was ( 130.12 ± 19.01 ), ( 116.77 ~ 23.67 ) for the model group and ( 148.44 ± 17.67) for the sham-operation group(P〈 0.05). The grey values of BACE in the hippocampus of the rats for the exercise group were( 131.21 ~ 25.25 ), ( 120.53± 10.21 ) for the model group(P〈 0.05 ) and ( 162.38 ± 28.11 ) for the sham-operation group (P 〈 0.05 ). Conclusion Exercise training can lower the expression of BACE and Aβ in the hippocampus of rats with VD, therefore improving the learning and memory ability of rats with VD.
出处 《中华行为医学与脑科学杂志》 CAS CSCD 北大核心 2012年第10期887-889,共3页 Chinese Journal of Behavioral Medicine and Brain Science
基金 湖南省卫生厅课题(2010-066) 衡阳市科技局课题(2010kj43)
关键词 血管性痴呆 运动训练 Β-淀粉样多肽 Β分泌酶 Vascular dementia Exercise training Amyloid-beta peptide β-secretase
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同被引文献42

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