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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

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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。

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