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1、丙泊酚對(duì)離體兔氣管黏膜上皮纖毛運(yùn)動(dòng)的影響摘要目的觀察不同濃度的丙泊酚對(duì)體外培養(yǎng)的兔氣管黏膜上皮細(xì)胞纖毛運(yùn)動(dòng)的影響,探討一氧化氮(NO)在丙泊酚影響纖毛運(yùn)動(dòng)中的作用。方法無菌條件下從健康新西蘭兔獲取離體氣管標(biāo)本,分離上皮組織培養(yǎng)7-8天后測(cè)定。以Hank平衡鹽溶液(HBSS)將丙泊酚的終濃度分別稀釋為1、10、20、50、100、200μg/ml。將組織塊隨機(jī)分為8組,前7組分別加入HBSS(P0)和上述6種濃度的丙泊酚(P1、P2、P3、P4、P5、P6),第8組(P7)同時(shí)加入200μg/ml的丙泊酚和0.1μmol
2、的一氧化氮合酶(NOS)總抑制劑——L-NMMA。在加藥前(T0)、加藥后1min(T1)、5min(T2)、10min(T3)、20min(T4)、30min(T5),采用高速數(shù)碼攝像系統(tǒng)采集纖毛擺動(dòng)圖像,通過IPLabV3.65軟件分析,計(jì)算纖毛擺動(dòng)頻率(ciliarybeatfrequency,CBF),并進(jìn)行組間和組內(nèi)對(duì)比。結(jié)果①P0組、P1組和P2組的CBF值在各時(shí)點(diǎn)與各自的基礎(chǔ)值對(duì)比均無明顯變化;P1組和P2組的CBF值與P0組相應(yīng)時(shí)間點(diǎn)相比無明顯變化,P值均>0.05;②P3組CBF在T1時(shí)點(diǎn)比基礎(chǔ)值和P
3、0組T1時(shí)點(diǎn)值明顯升高,P值<0.05;在隨后的各個(gè)觀察時(shí)點(diǎn)與基礎(chǔ)值及P0組相應(yīng)時(shí)間點(diǎn)無明顯變化,P值均>0.05;③P4P5、P6組加藥后各個(gè)觀察時(shí)點(diǎn)的CBF均明顯高于基礎(chǔ)值和P0組各時(shí)點(diǎn)值,P值<0.05。但這三組之間對(duì)比CBF無明顯差異,P值均>0.05。④P7組加藥后各時(shí)點(diǎn)的CBF值與基礎(chǔ)值相比均無明顯變化,P值>0.05。結(jié)論本實(shí)驗(yàn)中選用濃度的丙泊酚對(duì)體外培養(yǎng)的兔氣管黏膜上皮細(xì)胞纖毛運(yùn)動(dòng)無抑制作用。50μg/ml以上濃度的丙泊酚可促進(jìn)纖毛擺動(dòng)。丙泊酚可能是通過促進(jìn)NO合成和釋放而加速離體纖毛運(yùn)動(dòng)?!娟P(guān)鍵詞】丙
4、泊酚;氣管黏膜;上皮細(xì)胞;纖毛Effectsofpropofolonrabbitbronchialciliamovementmeasuredwithhigh-speeddigitalmicroscopyLIXiao-kui,DepartmentofAnesthesia,BeijingTongrenHospital,CapitalMedicalUniversity,Beijing100730,China【Abstract】ObjectiveToinvestigatetheeffectsofdifferentconcent
5、rationofpropofolonrabbittrachealciliamovement.MethodsCiliarybeatfrequency(CBF)ofculturedrabbitbronchialepithelialcellswasmeasuredbyhigh-speeddigitalmicroscopybefore(T0,baseline)and1min(T1),5min(T2),10min(T3),20min(T4),30min(T5)afterthespecimenwasdippedintoHBSSor
6、propofolsolutionattheconcentrationof1,10,20,50,100,200μg/ml,and200μg/mlwith0.1μmolL-NMMArespectively.ResultsCBFofculturedbronchialepithelialcellsexposedtoHBSSshowednosignificantchangeswithin30minutes.In1and10μg/mlpropofolsolution,CBFshowednosignificantchangeswit
7、hin30minutes.In20μg/mlpropofolsolution,CBFincreasedsignificantlyandreachedthepeakat1minuteafterpropofoladministration,thendecreasedgraduallyandshowednosignificancein5-30minutes.Inpropofolsolutionabove50μg/ml,CBFincreasedsignificantlyandmaintainedthespeedforthewh
8、oleobservingperiod.CBFofthespecimenpretreatedwith0.1μmolL-NMMAshowednosignificantchangesafterpropofoltreatment.Conclusions1-200μg/mlpropofoldoesnotinhibitCBFinculture