Inhibition of dihydropyrimidine dehydrogenase by α-interferon: experimental data on human tumor cell lines

Inhibition of dihydropyrimidine dehydrogenase by α-interferon: experimental data on human tumor cell lines
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α-干扰素对二氢嘧啶脱氢酶的抑制:人肿瘤细胞系的实验数据

DOI:
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发表时间:
2004
影响因子:
3
通讯作者:
D. Cupissol
D. Cupissol
中科院分区:
医学3区
文献类型:
--
作者:
G. Milano;J. Fischel;M. Etienne;N. Renée;P. Formento;A. Thyss;M. Gaspard;L. Thill;D. Cupissol

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干扰素是一种非常有前途的氟尿嘧啶(FU)生化调节剂。维持FU-IFN协同相互作用的药理学起源尚不清楚。最近有研究表明,α-IFN与治疗患者FU清除率的剂量依赖性降低有关。二氢嘧啶脱氢酶(DPD)是FU分解代谢的关键调节酶。IFN剂量和暴露时间对DPD的影响在五种人类癌细胞系中进行了评估。所有被研究的细胞系都表现出可量化的DPD活性,且具有细胞系间的可变性(0.118-0.318 nmol min - 1 mg protein - 1)。长时间暴露于IFN(长达5天)是获得DPD活性显著抑制的必要条件。DPD活性呈浓度依赖性显著下降,达到最高IFN浓度(105 IU/ml)测定的初始活性的50%,在所有细胞系测试(5天IFN暴露)中均被证明。对于三种细胞系,IFN以浓度依赖性的方式增强了fu诱导的生长抑制。考虑到所有细胞系和所有IFN浓度,似乎在全球范围内,DPD活性抑制越大,FU增强越大(所有细胞系的Spearman秩相关,P=0.011)。
Interferons (IFNs) are very promising fluorouracil (FU) biochemical modulators. The pharmacological origin sustaining the FU-IFN synergistic interaction is not clearly understood. It was recently shown that α-IFN was associated with a dose-dependent decrease in FU clearance in treated patients. Dihydropyrimidine dehydrogenase (DPD) is the key regulating enzyme for FU catabolism. The effects on DPD exerted by both the IFN dose and the duration of exposure were evaluated in a panel of five human cancer cell lines. All cell lines investigated exhibited quantifiable DPD activity with inter-cell-line variability (0.118–0.318 nmol min−1 mg protein−1). A prolonged exposure to IFN (up to 5 days) was necessary to obtain a significant inhibition of DPD activity. A concentration-dependent significant decrease in DPD activity, reaching 50% of the initial activity determined for the highest IFN concentration (105 IU/ml), was demonstrated in all cell lines tested (5-day IFN exposure). For three cell lines, IFN potentiated the FU-induced growth inhibition in a concentration-dependent manner. Considering all cell lines and all IFN concentrations, it appears that globally, the greater the inhibition of DPD activity, the greater the FU potentiation (Spearman rank correlation on all cell lines,P=0.011).
DOI: --
发表时间: 1986-10
期刊: Cancer research
影响因子: 11.2
作者:
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DOI: 10.1200/jco.1991.9.10.1806
发表时间: 1991
期刊: Journal of clinical oncology : official journal of the American Society of Clinical Oncology
影响因子: --
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DOI: --
发表时间: 1985
期刊: Cancer research
影响因子: 11.2
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DOI: --
发表时间: 1986
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作者:
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DOI: --
发表时间: 1994
期刊: Cancer research
影响因子: 11.2
作者:
Naguib,FN;Hao,SN;elKouni,MH
通讯作者: elKouni,MH