OALib Journal期刊
ISSN: 2333-9721
费用:99美元
|
|
|
洛拉曲克对胸苷酸合成酶蛋白质表达水平的动态影响
, PP. 881-884
Keywords: 洛拉曲克,胸苷酸合成酶,蛋白表达,耐药性
Abstract:
目的研究洛拉曲克作用后不同细胞胸苷酸合成酶(ts)蛋白质表达水平的动态变化有无差异。方法时间曲线中,lovo、lo2细胞分别用浓度为10、75μmol/l(接近各自的ic90值)的洛拉曲克处理0~60h。剂量曲线中,洛拉曲克作用时间36h,lovo细胞剂量范围0~40μmol/l。lo2细胞剂量范围0~125μmol/l。分别以流式细胞术法、westernblot法检测两种细胞ts蛋白表达水平。结果两种细胞在经过洛拉曲克处理后,ts表达的时间和剂量曲线具有显著不同的动态规律。在时间曲线中,lovo细胞ts蛋白的表达水平与对照相比呈持续升高的趋势,lo2细胞ts蛋白的表达水平与对照相比先降低,24h后ts蛋白表达水平逐渐回升,但至60h尚未恢复至对照水平。在剂量曲线中,lovo细胞ts蛋白的表达水平的变化呈峰形,以ic90值附近为最高,lo2细胞ts蛋白的表达水平,在低于ic90值的剂量点ts蛋白水平降低程度相似,高于ic90值的剂量处理后ts水平随剂量的升高而下降。结论洛拉曲克可以产生ts诱导现象,不同细胞在洛拉曲克作用后ts动态表达的差异是细胞耐药性不同的原因之一。
References
[1] | swainsm,lippmanme,eganef,etal.fluorouracilandhighdoseleucovorininpreviouslytreatedpatientswithmetastaticbreastcancer[j].jclinoncol,1989,7:890-9.
|
[2] | estlinej,balmannok,calvertah,etal.therelationshipbetweenintrinsicthymidylatesynthaseexpressionandsensitivitytothymitaqinhumanleukaemiaandcolorectalcarcinomacelllines[j].brjcancer,1997,76(12):1579-85.
|
[3] | creavenpj,pendyalal,meropolnj,etal.initialclinicaltrialandpharmacokineticsofthymitaqtmby10-daycontinuousinfusioninpatientswithadvancedsolidtumors[j].cancerchemotherpharmacol,1998,41:167-70.
|
[4] | moktsk,leungtwt,leesd,etal.amulti-centrerandomizedphaseⅱstudyofnolatrexedversusdoxorubicinintreatmentofchinesepatientswithadvancedhepatocellularcarcinoma[j].cancerchemotherpharmacol,1999,44:307-11.
|
[5] | pivotx,wadlers,kellyc,etal.resultoftworandomizedtrialscomparingnolatrexed(thymitaq)versusmethotrexateinpatientswithrecurrentheadandneckcancer[j].annoncol,2001,12:1595-9.
|
[6] | nomurat,nakagawam,fujitay,etal.clinicalsignificanceofthymidylatesynthaseexpressioninbladdercancer[j].intjurol,2002,9:368-76.
|
[7] | chue,koellerdm,caseyjl,etal.autoregualtrionofhumanthymidylatesynthasemessengerrnatranslationbythymidylatesynthase[j].procnatlacadsciusa,1991,88:8977-81.
|
[8] | chue,koellerdm,johnstonpg,regulationofthymidylatesynthaseinhumancoloncancercellstreatedwith5-fluorouracilandinterferon-gamma[j].molpharmacol,1993,43:527-33.
|
[9] | shawd,bergerfg,spencerht.retroviralexpressionofescherichiacolithymidylatesynthasecdnaconfershigh-levelantifolateresistancetohematopoieticcells[j].humgenether,2001,12:51-9.
|
[10] | triestbv,pinedohm,hensbergenyv,etal.tymidylatesynthaselevelasthemainpredictiveparameterforsensitivityto5-fluorouracil,butforfolate-basedthymidylatesynthaseinhibitor,in13nonselectedcoloncancercelllines[j].clincancerres,1999,5:643-54.
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|