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《急慢性應(yīng)激對(duì)大鼠中樞神經(jīng)肽y腺苷酸環(huán)化酶表達(dá)的影響》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、急慢性應(yīng)激對(duì)大鼠中樞神經(jīng)肽Y腺苷酸環(huán)化酶表達(dá)的影響【摘要】目的探討急、慢性應(yīng)激對(duì)大鼠行為及不同腦區(qū)神經(jīng)肽Y、腺苷酸環(huán)化酶表達(dá)的影響。方法將30只雄性SD大鼠隨機(jī)分為急性應(yīng)激組、慢性應(yīng)激組和正常對(duì)照組,每組10只,用強(qiáng)迫游泳和空瓶刺激分別制作急性和慢性應(yīng)激模型,采用開(kāi)野實(shí)驗(yàn)箱觀察各組大鼠進(jìn)入中央格次數(shù)、停留時(shí)間、外周格子數(shù)、修飾次數(shù)、糞便粒數(shù);采用免疫組織化學(xué)方法檢測(cè)各組大鼠神經(jīng)肽Y、腺苷酸環(huán)化酶在前額葉皮質(zhì),海馬CA3區(qū),紋狀體的表達(dá)水平,并進(jìn)行相關(guān)分析。結(jié)果開(kāi)野實(shí)驗(yàn)箱中觀察各組大鼠行為學(xué)指標(biāo)顯示,三組進(jìn)入中央格次數(shù)、停留
2、時(shí)間、外周格子數(shù)及修飾次數(shù)比較均有顯著性差異(F=2.31、2.76、4.20、4.37,P<0.01~0.05)。神經(jīng)肽Y表達(dá)水平急、慢性應(yīng)激組在前額葉皮質(zhì)、紋狀體均顯著高于正常對(duì)照組(F=7.37、4.60,P<0.01),在海馬CA3區(qū)慢性應(yīng)激組表達(dá)水平顯著高于正常對(duì)照組(P<0.05),而急性應(yīng)激組無(wú)顯著性變化。腺苷酸環(huán)化酶在慢性應(yīng)激組大鼠的前額葉皮質(zhì),海馬CA3,紋狀體的表達(dá)水平顯著低于正常對(duì)照組(P<0.05),而急性應(yīng)激組大鼠在紋狀體表達(dá)有所增加(P<0.05)。急性應(yīng)激組大鼠前額葉皮質(zhì),紋狀體腺苷酸環(huán)化酶的
3、表達(dá)和該組大鼠在開(kāi)野實(shí)驗(yàn)箱中的停留時(shí)間,修飾次數(shù)成顯著正相關(guān)(r=0.944、0.944、0.868、0.783)。結(jié)論強(qiáng)迫游泳和空瓶應(yīng)激可誘導(dǎo)大鼠情緒障礙,神經(jīng)肽Y、腺苷酸環(huán)化酶與情緒有關(guān),前額葉皮質(zhì)、紋狀體腺苷酸環(huán)化酶的表達(dá)在急性應(yīng)激狀態(tài)的生理改變中有重要作用?!娟P(guān)鍵詞】應(yīng)激;前額葉皮質(zhì);海馬;紋狀體;神經(jīng)肽Y;腺苷酸環(huán)化酶 【Abstract】ObjectiveToexploretheeffectsofacuteandchronicstressonbehaviorandexpressionofneuropeptid
4、eYandadenylcyclaseinrats′differentencephalicregion.MehtodsThirtymaleSpragueDalydividedintoacutestress,chronicstressandcontrolgroup(eachn=10),acuteandchronicstressmodelsademingandemptybottlestimulationseparately,andfrequencyofgettingintocentralgrille,detentiontime
5、,outergrillenumbers,modifyingnumbersanddejecturegrainnumberentalbox;expressionsofneuropeptideYandadenylcyclaseinprefrontallobecortex,hippocampusCA3,striatumofthegroupsmunohistochemistrymethodandcorrelationanalysesconducted.ResultsTheree,outergrillenumbers,modifyin
6、gnumbersamongthe3groups(P<0.01~0.05).ExpressionlevelsofneuropeptideYinprefrontallobecortexandstriatumarkedlyhigherinbothacuteandchronicandinhippocampusCA3inthechronicthaninthecontrolgroup(P<0.01,P<0.05).Expressionsofadenylcyclaseinprefrontallobecortex,hip
7、pocampusCA3andstriatumintheacutegroupincreased(P<0.05).Expressionsofadenylcyclaseinprefrontallobecortexandstriatumeandmodifyingnumbersintheacutegroup.ConclusionForcedsmingandemptybottlestimulationcouldinducerats’emotionaldisorder,neuropeptideandadenylcyclaseare
8、relatedtoemotionandexpressionsofadenylcyclaseinprefrontallobecortexandstriatumhasanimportantroleinphysiochangesinacutestressstate. 【Keypus;striatum;ne