中国老年学杂志
中國老年學雜誌
중국노년학잡지
Chinese Journal of Gerontology
2015年
21期
6027-6030
,共4页
高盐饮食%大脑皮质%氧化应激%钠钙泵
高鹽飲食%大腦皮質%氧化應激%鈉鈣泵
고염음식%대뇌피질%양화응격%납개빙
High-salt diet%Cerebral cortex%Oxidative stress%Na+-pump%Ca2+-pump
目的:探讨长期高盐饮食对大鼠大脑皮质氧化应激和 Na+-K+-ATPase、Ca2+-ATPase活性及其相关基因表达的影响。方法雄性Wistar大鼠随机分为正常盐对照组(NS组,n=13)、8%高盐组(HS组,n=24)和8%高盐+替米沙坦干预组(HS+Tel组,n=12),每2 w测量尾动脉压1次,喂养共24 w。比色法测定大鼠大脑皮质丙二醛( MDA)含量和超氧化物歧化酶( SOD)酶活性;用生化酶学法检测大脑皮质 Na+-K+-ATPase、Ca2+-ATPase活性;通过实时荧光定量PCR法检测大脑皮质NAPDH、Na+-K+-ATPase α1、细胞质膜钙泵(PMCA)1、钠钙交换蛋白(NCX)1和 NADPH氧化酶亚单位P22phox mRNA表达。结果与NS组比较,HS组MDA含量增加、SOD活性减弱(P<0.05),Na+-K+-ATPase、Ca2+-ATPase活性均降低(P<0.05),NADPH氧化酶亚单位P22phox、Na+-K+-ATPase α1、PMCA1 mRNA表达增加(P<0.05),NCX1mRNA表达无明显变化;与 HS组比较,HS+Tel组Na+-K+-ATPase、Ca2+-ATPase活性升高(P<0.05),其他指标无明显改变。结论高盐饮食可引起大鼠大脑皮质氧化损伤及钠钙泵活性降低。
目的:探討長期高鹽飲食對大鼠大腦皮質氧化應激和 Na+-K+-ATPase、Ca2+-ATPase活性及其相關基因錶達的影響。方法雄性Wistar大鼠隨機分為正常鹽對照組(NS組,n=13)、8%高鹽組(HS組,n=24)和8%高鹽+替米沙坦榦預組(HS+Tel組,n=12),每2 w測量尾動脈壓1次,餵養共24 w。比色法測定大鼠大腦皮質丙二醛( MDA)含量和超氧化物歧化酶( SOD)酶活性;用生化酶學法檢測大腦皮質 Na+-K+-ATPase、Ca2+-ATPase活性;通過實時熒光定量PCR法檢測大腦皮質NAPDH、Na+-K+-ATPase α1、細胞質膜鈣泵(PMCA)1、鈉鈣交換蛋白(NCX)1和 NADPH氧化酶亞單位P22phox mRNA錶達。結果與NS組比較,HS組MDA含量增加、SOD活性減弱(P<0.05),Na+-K+-ATPase、Ca2+-ATPase活性均降低(P<0.05),NADPH氧化酶亞單位P22phox、Na+-K+-ATPase α1、PMCA1 mRNA錶達增加(P<0.05),NCX1mRNA錶達無明顯變化;與 HS組比較,HS+Tel組Na+-K+-ATPase、Ca2+-ATPase活性升高(P<0.05),其他指標無明顯改變。結論高鹽飲食可引起大鼠大腦皮質氧化損傷及鈉鈣泵活性降低。
목적:탐토장기고염음식대대서대뇌피질양화응격화 Na+-K+-ATPase、Ca2+-ATPase활성급기상관기인표체적영향。방법웅성Wistar대서수궤분위정상염대조조(NS조,n=13)、8%고염조(HS조,n=24)화8%고염+체미사탄간예조(HS+Tel조,n=12),매2 w측량미동맥압1차,위양공24 w。비색법측정대서대뇌피질병이철( MDA)함량화초양화물기화매( SOD)매활성;용생화매학법검측대뇌피질 Na+-K+-ATPase、Ca2+-ATPase활성;통과실시형광정량PCR법검측대뇌피질NAPDH、Na+-K+-ATPase α1、세포질막개빙(PMCA)1、납개교환단백(NCX)1화 NADPH양화매아단위P22phox mRNA표체。결과여NS조비교,HS조MDA함량증가、SOD활성감약(P<0.05),Na+-K+-ATPase、Ca2+-ATPase활성균강저(P<0.05),NADPH양화매아단위P22phox、Na+-K+-ATPase α1、PMCA1 mRNA표체증가(P<0.05),NCX1mRNA표체무명현변화;여 HS조비교,HS+Tel조Na+-K+-ATPase、Ca2+-ATPase활성승고(P<0.05),기타지표무명현개변。결론고염음식가인기대서대뇌피질양화손상급납개빙활성강저。
Objective To study the effects of high salt diet on oxidative stress and Na+-K+-ATPase and Ca2+-ATPase activities and the mRNA expression in cerebral cortex of Wistar rats.Methods Wistar rats were divided into normal salt control( NS)( n=13),high salt (8%) model(HS, n=24) and high salt+telmisartan(HS+Tel) groups(n=12).Tail-cuff artery pressure was determined every 2 weeks. Values of SOD activity and MDA content were determined by colorimetry.The activities and mRNA levels of Na+-K+-ATPase and Ca2+-AT-Pase in cerebral cortex were determined by enzyme colorimetry and real-time polymerase chain reaction( PCR) ,respectively.Results Com-pared with those of NS group, activity of SOD was decreased and MDA content was increased.The activities of Na+-K+-ATPase and Ca2+-ATPase were significantly reduced, whereas the mRNA expressions of NAPDH, Na+-K+-ATPaseα1 subunit and PMCA1 were increased.Af-ter treated with telmisartan, the activities of Na+-K+-ATPase and Ca2+-ATPase became much higher compared with those of HS group.Con-clusions Long-term high-salt diet could lead to oxidative stress and down-regulat activities of Na+-K+-ATPase and Ca2+-ATPase in cerebral cortex.