中华心律失常学杂志
中華心律失常學雜誌
중화심률실상학잡지
CHINESE JOURNAL OF CARDIAC ARRHYTHMIAS
2013年
4期
298-302
,共5页
石少波%梁锦军%谌晶晶%王芳%谌莹莹%袁晓冉%曲川%杨波
石少波%樑錦軍%諶晶晶%王芳%諶瑩瑩%袁曉冉%麯川%楊波
석소파%량금군%심정정%왕방%심형형%원효염%곡천%양파
NMDA受体%Kv4.2%心肌梗死%抑郁%心电生理
NMDA受體%Kv4.2%心肌梗死%抑鬱%心電生理
NMDA수체%Kv4.2%심기경사%억욱%심전생리
NMDA receptor%Kv4.2%Myocardial infarction%Depression%Cardiac electrophysiology
目的 通过建立心肌梗死(MI)后抑郁大鼠模型,检测心室颤动(室颤)阈值及心肌细胞N-甲基-D-门冬氨酸(N Methyl D Aspartate,NMDA)受体亚基(NMDAR1)、Kv4.2的表达情况,探讨NMDA受体在心肌梗死后抑郁大鼠心电生理异常中的作用.方法 将50只SD大鼠随机均分为对照组、抑郁组(MDD组)、心肌梗死组(MI组)、MI后抑郁组(MI+MDD组)和氟西汀组(F组).通过结扎冠状动脉和慢性不可预见性温和应激,建立MI和抑郁大鼠模型,并运用心电图、Masson染色、糖水偏好实验和旷场实验对模型进行鉴定.采用S1S1程序电刺激左心室,测量各组大鼠室颤阈值.通过免疫组化法半定量各组大鼠心肌细胞NMDAR1、Kv4.2的表达.结果 ①心电图、Masson染色、糖水偏好实验和旷场实验结果显示模型制作成功;②与对照组[(8.3±0.7)V]相比,MI组、MDD组、MI+MDD组室颤阈值降低,F组室颤阈值升高[(5.2±0.9)V、(7.4±0.6)V、(4.0±0.5)V、(12.0±0.3)v],差异有统计学意义(P<0.05),其中MI+MDD组最低;③免疫组化结果:MDD组和MI+MDD组大鼠心肌细胞内NMDAR1呈强阳性表达,显著高于其他3组,F组表达量最低;各组大鼠心肌细胞中均可见Kv4.2阳性表达,对照组的表达量最高,MI+MDD组的表达量最低,F组较MI+MDD组表达增加.结论 心肌细胞NMDA受体过度表达和Kv4.2表达下降可能是MI后抑郁大鼠心电生理异常的分子机制之一.
目的 通過建立心肌梗死(MI)後抑鬱大鼠模型,檢測心室顫動(室顫)閾值及心肌細胞N-甲基-D-門鼕氨痠(N Methyl D Aspartate,NMDA)受體亞基(NMDAR1)、Kv4.2的錶達情況,探討NMDA受體在心肌梗死後抑鬱大鼠心電生理異常中的作用.方法 將50隻SD大鼠隨機均分為對照組、抑鬱組(MDD組)、心肌梗死組(MI組)、MI後抑鬱組(MI+MDD組)和氟西汀組(F組).通過結扎冠狀動脈和慢性不可預見性溫和應激,建立MI和抑鬱大鼠模型,併運用心電圖、Masson染色、糖水偏好實驗和曠場實驗對模型進行鑒定.採用S1S1程序電刺激左心室,測量各組大鼠室顫閾值.通過免疫組化法半定量各組大鼠心肌細胞NMDAR1、Kv4.2的錶達.結果 ①心電圖、Masson染色、糖水偏好實驗和曠場實驗結果顯示模型製作成功;②與對照組[(8.3±0.7)V]相比,MI組、MDD組、MI+MDD組室顫閾值降低,F組室顫閾值升高[(5.2±0.9)V、(7.4±0.6)V、(4.0±0.5)V、(12.0±0.3)v],差異有統計學意義(P<0.05),其中MI+MDD組最低;③免疫組化結果:MDD組和MI+MDD組大鼠心肌細胞內NMDAR1呈彊暘性錶達,顯著高于其他3組,F組錶達量最低;各組大鼠心肌細胞中均可見Kv4.2暘性錶達,對照組的錶達量最高,MI+MDD組的錶達量最低,F組較MI+MDD組錶達增加.結論 心肌細胞NMDA受體過度錶達和Kv4.2錶達下降可能是MI後抑鬱大鼠心電生理異常的分子機製之一.
목적 통과건립심기경사(MI)후억욱대서모형,검측심실전동(실전)역치급심기세포N-갑기-D-문동안산(N Methyl D Aspartate,NMDA)수체아기(NMDAR1)、Kv4.2적표체정황,탐토NMDA수체재심기경사후억욱대서심전생리이상중적작용.방법 장50지SD대서수궤균분위대조조、억욱조(MDD조)、심기경사조(MI조)、MI후억욱조(MI+MDD조)화불서정조(F조).통과결찰관상동맥화만성불가예견성온화응격,건립MI화억욱대서모형,병운용심전도、Masson염색、당수편호실험화광장실험대모형진행감정.채용S1S1정서전자격좌심실,측량각조대서실전역치.통과면역조화법반정량각조대서심기세포NMDAR1、Kv4.2적표체.결과 ①심전도、Masson염색、당수편호실험화광장실험결과현시모형제작성공;②여대조조[(8.3±0.7)V]상비,MI조、MDD조、MI+MDD조실전역치강저,F조실전역치승고[(5.2±0.9)V、(7.4±0.6)V、(4.0±0.5)V、(12.0±0.3)v],차이유통계학의의(P<0.05),기중MI+MDD조최저;③면역조화결과:MDD조화MI+MDD조대서심기세포내NMDAR1정강양성표체,현저고우기타3조,F조표체량최저;각조대서심기세포중균가견Kv4.2양성표체,대조조적표체량최고,MI+MDD조적표체량최저,F조교MI+MDD조표체증가.결론 심기세포NMDA수체과도표체화Kv4.2표체하강가능시MI후억욱대서심전생리이상적분자궤제지일.
Objective To detect the ventricular fibrillation threshold and the expression of N Methyl D Aspartate receptor NMDAR1 and Kv4,.2 through establishing rat model of depression after myocardial infarction,to investigate the effects of NMDA receptor on cardiac electrophysiological abnormalities in rat with depression after myocardial infarction.Methods (①Fifty SD rats were randomly divided into N group (normal group),MDD group (depression group),MI group (myocardial infarction group),MI+MDD group (depression after myocardial infarction group) and F group(fluoxetine group),10 rats in each group.②By ligation of the left anteriordescending coronary artery to build model of myocardial infarction,and set in chronic unpredictable mild stress to build a model of depression,the ECG,Masson staining,sugar preference experiments and open field test were used to identify thesemodels.③The ventricular fibrillation threshold (VFF) was obtained thought the S1 S1 left ventricle electrical stimulation program.④Immunohistochemistry was used for quantifing the expression of NMDAR and Kv4.2.Results The results of ECG,HE staining,Masson staining,sugar preference experiments and the open field test show that the model was successful.(② the VFT in three groups(MI group,MDD group and MI+MDD group) was lower than N group,the VFT in F group was higher than that in N group(8.3±0.7) V、(5.2±0.9) V、(7.4±0.6) V、(4.0±0.5) V、(12.0±0.3) V,respectively (P<0.05).③The immunohistochemical staining results:the myocardial cells expression of NMDAR1 was strongly positive in MDD group and MI+ MDD group,and was significantly higher than that in the other three groups.It was the lowest in F group.The expression of Kv4.2 was visible in each group,it was the highest in the normal group while it was the lowest in 9MI+MDD group.Conclusion The over expression of NMDAR1 and decreased expression of Kv4.2 may be one of the molecular mechanisms of cardiac electrophysiological abnormalities in rat with depression after myocardial infarction.