新生期反复惊厥大鼠神经行为改变及褪黑素的预防作用  被引量:3

Neurobehavioral changes and the prevention effect by melatonin for neonatal rats with recurrent seizures

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作  者:孙奇[1] 赵东敬[1] 田甜[1] 徐丹凤[1] 倪宏[1] 

机构地区:[1]苏州大学附属儿童医院,苏州215003

出  处:《中华行为医学与脑科学杂志》2013年第5期385-387,共3页Chinese Journal of Behavioral Medicine and Brain Science

基  金:国家自然科学基金项目(81271458);江苏省医学重点人才基金项目(RC2011113)

摘  要:目的探讨新生期反复惊厥后大鼠的远期神经行为改变及褪黑素(Melatonin)的预防作用。方法生后6d(用P6表示,下同)的健康Sprague—Dawley(SD)大鼠24只,采用随机数字法分成4组,每组6只:对照组(CONT)、褪黑素空白对照组(MEL)、惊厥组(RecurrentSeizures,RS)及褪黑素组(Rs+MEL)。通过三氟乙醚反复吸入建立新生期大鼠反复惊厥动物模型:Rs组每日吸入三氟乙醚诱导惊厥发作5次,每次间隔30min,连续9d;RS+MEL组于惊厥前1h(上午8:00)腹腔注射褪黑素(55mg/kg),同样方法吸入三氟乙醚诱导惊厥发作,方法同RS组;MEL组,与Rs+MEL组同样操作但不吸入三氟乙醚。于P24进行神经行为学评分(平面翻正实验、悬崖回避实验、前肢悬吊实验、负向趋地应实验),于P35天进行旷场行为实验。结果(1)平面翻正实验显示:RS组平面翻正时间[(0.33±0.51)S]较CONT组[(1.17±0.40)s]和RS+MEL组[(0.50±0.54)S]明显缩短,差异有统计学意义(P〈0.05)。(2)悬崖回避实验显示:RS组悬崖回避时间[(16.00±6.32)S]较CONT组[(4.00±2.60)S]和RS+MEL组[(7.67±3.26)S]明显延长(P〈0.05);(3)前肢悬吊实验显示:Rs组前肢悬吊持续时间[(11.67±7.58)S]较CONT组[(49.50±28.96)S]和RS+MEL组[(24.83±6.61)s]明显缩短(P〈0.05)。(4)负向趋地反应实验显示:RS组负向趋地反应时间[(7.67±1.36)S]较CONT组[(4.50±2.66)S]和RS+MEL组[(6.17±0.75)S]明显延长(P〈0.05)。(5)旷场实验显示:RS组延迟时间[(8.17±3.86)S]较CONT组[(3.00±1.41)S]明显延长(P〈0.05)。结论三氟乙醚诱导的新生期大鼠反复惊厥发作会导致神经行为损伤,惊厥发作前应用褪黑素进行预防,能改善惊厥所致神经行为损伤。.Objective To explore neurobehavioral changes in rats with recurrent seizures and the prevention effect of melatonin. Methods 6-day-old (P6) SD rats were randomly divided into four groups of 24 ( n = 6 ) : the control group (CONT), melatonin per se group (MEL) , recurrent neonatal seizure group (RS) and melatonin administration prior to RS group ( RS + MEL). Rats in RS group were subjected to 5 seizures with flurothyl during the first 14 days of life. In RS + MEL group, meiatonin was injected at 8:00 before seizures were induced. Neurobehavioral tests including Plane righting experiment, Cliff avoidance test, the grip-strength test and negative geotaxis test were implemented on P24,while open field test on P35. Results (1) Plane righting experiment: the time of plane righting in RS group ((0.33 ± 0.51 )s) was significantly shorter than that in the CONT group ( ( 1.17 ±0. 40 ) s) and RS ± MEL group ( ( 0.50 ± 0.54 ) s) (P 〈 0.05 ). ( 2 ) Cliff avoidance test : the time of cliff avoidance in RS group ( ( 16.00 ± 6.32) s) was significantly longer than that in CONT group ( (4.00 ± 2.60) s) (P〈0.01) ,while the time of cliff avoidance in RS ± MEL group ( (7.67 ± 3.26) s) was shorter than that in the RS group (P 〈 0.05 ). ( 3 ) The grip-strength test : compared with CONT group ( ( 49.50 ±28.96 ) s ), the time nee ded to hold on wire in RS group( (11. 67 ± 7.58 )s)was significantly shorter (P 〈 0.05 ) and longer in RS + MEL group ((24.83 ± 6.61 )s) (P 〈 0.05 ). (4)Negative geotaxis test: the time for rats to turn 180° upward in RS group( (7.67 ± 1.36) s) was longer than that in the CONT group ( (4.50 ± 2.66) s) and RS + MEL group ( (6.17 ±0. 75 ) s) (P 〈 0.05 ). (5) Open field test : the time for rats to begin to run in the RS group ( ( 8.17 ± 3.86 ) s) was longer than that in the CONT group ( (3.00

关 键 词:新生期 惊厥 褪黑素 神经行为 

分 类 号:R7[医药卫生—临床医学]

 

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