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《東亞鉗蝎提取物對(duì)癲癇小鼠大腦皮層nmda受體和gabaa受體的調(diào)節(jié)作用論文》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、東亞鉗蝎提取物對(duì)癲癇小鼠大腦皮層NMDA受體和GABAA受體的調(diào)節(jié)作用論文【關(guān)鍵詞】東亞鉗蝎提取物;,,GABAA受體;,,NMDA受體;,,癲癇摘要:目的研究BmKE對(duì)抗戊四氮致癲癇作用及其對(duì)致癇小鼠大腦皮層NMDAR和GABAAR的調(diào)節(jié)作用。方法觀察戊四氮(PTZ)致癲癇模型小鼠,丙戊酸鈉(VAP,陽(yáng)性對(duì)照)治療組和BmKE低(L)、中(M)、高(H)劑量治療組小鼠癲癇發(fā)作的潛伏期,應(yīng)用同位素3H分別標(biāo)記MK-801和Mucimol,檢測(cè)小鼠大腦皮層NMDAR和GABAAR的結(jié)合活性。結(jié)果Bm
2、KE(M)能顯著延長(zhǎng)PTZ致癲癇小鼠的發(fā)作潛伏期(P<0.05),BmKE(L)作用很小,BmKE(H)治療組癲癇小鼠發(fā)作潛伏期的延長(zhǎng)值比BmKE(M)治療組低。PTZ顯著升高致癇小鼠大腦皮層的NMDAR結(jié)合活性(P<0.05),BmKE(L)治療組小鼠大腦皮層NMDAR結(jié)合活性降低.freelKE(M)和BmKE(H)均極顯著降低癲癇小鼠大腦皮層NMDAR結(jié)合活性(P<0.001)。BmKE(L)和BmKE(H)顯著提高GABAAR結(jié)合活性(P<0.05),BmKE(M)極顯著提高GABAAR結(jié)
3、合活性(P<0.001)。結(jié)論適量的BmKE能夠有效治療戊四氮引起的癲癇,顯著延長(zhǎng)癲癇小鼠的發(fā)作潛伏期,BmKE抗癲癇的作用機(jī)理,可能與其抑制NMDAR結(jié)合活性,激活GABAAR的結(jié)合活性有關(guān)。關(guān)鍵詞:東亞鉗蝎提取物;GABAA受體;NMDA受體;癲癇TheModulationofButhusmartensicKarchExtract(BmKE)onCerebralCortexNMDAReceptorandGABAAReceptorinEpilepticMiceAbstract:Objective
4、TostudytheantagonismofBmKEonepilepsyofPTZinducedepilepticmiceandthemodulationonNMDAreceptor(NMDAR)andGABAAreceptor(GABAAR)bindingactivitiesincerebralcortex.MethodsTheconvulsionlatentperiodsofPTZinducedepilepticmice,vaproatesodium(VAP,positivecontroldr
5、ug)treatinggroupandBmKE(L),BmKE(M),BmKE(H)treatinggroupsulimolrespectively.ResultsBmKE(M)significantlyprolongedlatenperiodsofepilepticmice(P<0.05),BmKE(L)hadafeKE(H)KE(M).PTZsignificantlyincreasedNMDARbindingactivitiesincerebralcortexofmice(P<0.05).Bo
6、thBmKE(M)andBmKE(H)excessivelydecreasedthoseofPTZ-inducedepilepticmice(p0.001),butthoseofBmKE(L)treatedgrouphadnosignificantdifferenceice.GABAARbindingactivitiesKE(L)andBmKE(H)significantlyincreasedthoseofPTZinducedepilepticmice(P<0.05),andBmKE(M)exce
7、ssivelyincreasedthoseofPTZinducedepilepticmice(P<0.001).ConclusionSuitableBmKEcanprolonglatentperiodsofepilepsticmiceinducedbyPTZ,andhasanantiepilepticeffect.TheeffectsofBmKEmayhaverelationshipbetice.KeyKE;GABAAreceptor;NMDAreceptor;Convulsionlatentpe
8、riod東亞鉗蝎ButhusmartensicKarch是我國(guó)傳統(tǒng)藥材,中醫(yī)臨床用干燥全蟲治療驚風(fēng)抽搐、風(fēng)濕痹痛等癥[1]。提取分離有效部位,進(jìn)而純化有效成分,對(duì)其進(jìn)行藥理活性的檢測(cè),研究其作用機(jī)理將進(jìn)一步提高其臨床應(yīng)用價(jià)值。在實(shí)驗(yàn)性癲癇中,GABAAR的Cl-通道阻斷劑戊四氮(pentyleetrazol,PTZ)被廣泛應(yīng)用于誘導(dǎo)產(chǎn)生驚厥、建立癲癇動(dòng)物模型。早期的研究發(fā)現(xiàn),PTZ不僅具有抑制GABAA受體的效應(yīng)[2,3],連續(xù)注射還可引起NMDA受體激活,導(dǎo)致Ca2+向細(xì)胞內(nèi)流動(dòng)