神经药理学报
神經藥理學報
신경약이학보
Journal of Hebei North University(Medical Edition)
2013年
3期
1-7
,共7页
他莫昔芬%学习记忆%雌性%大鼠%选择性雌激素受体调节剂
他莫昔芬%學習記憶%雌性%大鼠%選擇性雌激素受體調節劑
타막석분%학습기억%자성%대서%선택성자격소수체조절제
tamoxifen%learning and memory%female%rats%selective estrogen receptor modulators
目的:探讨腹腔注射选择性雌激素受体调节剂他莫昔芬(tamoxifen,TC)对雌性大鼠学习记忆能力的影响。方法:将60只成年雌性SD大鼠随机分为空白对照组、溶剂对照组、TC 2.5 mg·kg-1组、TC 5.0 mg·kg-1组、TC 10.0 mg·kg-1组5组,采用Morris水迷宫、跳台及八臂迷宫等行为学实验检测TC对雌性SD大鼠空间辨别学习记忆能力、被动回避条件反射能力及主动学习记忆能力的影响。结果:与溶剂对照组相比,3周后,TC各剂量组被动回避条件反射能力明显下降(P<0.05),表现为跳台实验中的逃避潜伏期显著减少,错误反应次数明显增加。6周后,TC各剂量组大鼠的空间辨别学习记忆能力、被动回避条件反射能力及主动学习记忆能力均明显下降(P<0.05),表现为Morris实验定位航行的潜伏期增加,目的象限的停留时间减少,第一次到达平台的时间延长;跳台实验中逃避潜伏期显著减少,错误反应次数明显增加;八臂迷宫实验中主动学习过程中总路程明显延长,典型性错误次数显著增加。结论:雌性SD大鼠腹腔注射TC 6周后,其学习记忆能力随着TC剂量的增加而降低,TC对雌性SD大鼠的学习记忆能力具有明显的损伤作用。
目的:探討腹腔註射選擇性雌激素受體調節劑他莫昔芬(tamoxifen,TC)對雌性大鼠學習記憶能力的影響。方法:將60隻成年雌性SD大鼠隨機分為空白對照組、溶劑對照組、TC 2.5 mg·kg-1組、TC 5.0 mg·kg-1組、TC 10.0 mg·kg-1組5組,採用Morris水迷宮、跳檯及八臂迷宮等行為學實驗檢測TC對雌性SD大鼠空間辨彆學習記憶能力、被動迴避條件反射能力及主動學習記憶能力的影響。結果:與溶劑對照組相比,3週後,TC各劑量組被動迴避條件反射能力明顯下降(P<0.05),錶現為跳檯實驗中的逃避潛伏期顯著減少,錯誤反應次數明顯增加。6週後,TC各劑量組大鼠的空間辨彆學習記憶能力、被動迴避條件反射能力及主動學習記憶能力均明顯下降(P<0.05),錶現為Morris實驗定位航行的潛伏期增加,目的象限的停留時間減少,第一次到達平檯的時間延長;跳檯實驗中逃避潛伏期顯著減少,錯誤反應次數明顯增加;八臂迷宮實驗中主動學習過程中總路程明顯延長,典型性錯誤次數顯著增加。結論:雌性SD大鼠腹腔註射TC 6週後,其學習記憶能力隨著TC劑量的增加而降低,TC對雌性SD大鼠的學習記憶能力具有明顯的損傷作用。
목적:탐토복강주사선택성자격소수체조절제타막석분(tamoxifen,TC)대자성대서학습기억능력적영향。방법:장60지성년자성SD대서수궤분위공백대조조、용제대조조、TC 2.5 mg·kg-1조、TC 5.0 mg·kg-1조、TC 10.0 mg·kg-1조5조,채용Morris수미궁、도태급팔비미궁등행위학실험검측TC대자성SD대서공간변별학습기억능력、피동회피조건반사능력급주동학습기억능력적영향。결과:여용제대조조상비,3주후,TC각제량조피동회피조건반사능력명현하강(P<0.05),표현위도태실험중적도피잠복기현저감소,착오반응차수명현증가。6주후,TC각제량조대서적공간변별학습기억능력、피동회피조건반사능력급주동학습기억능력균명현하강(P<0.05),표현위Morris실험정위항행적잠복기증가,목적상한적정류시간감소,제일차도체평태적시간연장;도태실험중도피잠복기현저감소,착오반응차수명현증가;팔비미궁실험중주동학습과정중총로정명현연장,전형성착오차수현저증가。결론:자성SD대서복강주사TC 6주후,기학습기억능력수착TC제량적증가이강저,TC대자성SD대서적학습기억능력구유명현적손상작용。
Objective: To investigate the effects of tamoxifen on learning and memory abilities in female rats after intraperitoneal injection(ip)of the selective estrogen receptor modulator. Methods:Adult female Sprague-Dawley(SD)rats(n=60)were randomly assigned into 5 groups(control group, vehicle group, 2.5 mg·kg-1 of TC group, 5.0 mg·kg-1 of TC group and 10.0 mg·kg-1 of TC group). Morris water maze test, step-down test and 8-arm maze task were used to test the effects of tamoxifen on spatial learning and memory ability, passive avoidance conditioned reflex ability and active learning and memory ability in female SD rats, respectively. Results:Compared with vehicle group, passive avoidance conditioned reflex ability of the rats after ip of TC for three weeks was significantly decreased(P<0.05). After six weeks of drug treatment, the discriminability on spatial learning and memory ability, passive avoidance conditioned reflex ability and active learning and memory ability were all significantly reduced in these female SD rats(P<0.05). Conclusion: The results suggested that after tamoxifen treatment for six weeks, the learning and memory abilities in female SD rats were decreased dose-dependently, and that tamoxifen could cause substantial learning and memory deficits in female SD rats.