Sequential inhibitory effects of antitumor agents related to levodopa and dopamine upon DNA synthetic enzymes.

Sequential inhibitory effects of antitumor agents related to levodopa and dopamine upon DNA synthetic enzymes.
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左旋多巴和多巴胺相关抗肿瘤药物对 DNA 合成酶的连续抑制作用。

DOI:
10.1016/0006-2952(86)90525-3
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发表时间:
1986
影响因子:
5.8
通讯作者:
Wick,MM
Wick,MM
中科院分区:
医学2区
文献类型:
--
作者:
Fitzgerald,GB;Wick,MM

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与左旋多巴和多巴胺相关的新型抗肿瘤药物表现出选择性和快速抑制DNA合成的胸腺嘧啶掺入。我们的研究试图确定选择性抑制肿瘤细胞的生化基础,在本研究中,我们检查了这些药物对胸苷酸合成酶的影响。在100 ~ 800 μM的浓度范围内,发现二羟基苯衍生物对胸腺苷合酶有抑制作用。在10 ~ 100 μM的浓度范围内,氧化的醌类对部分纯化的胸苷酸合成酶有抑制作用,但醌类对部分纯化的胸苷酸合成酶没有抑制作用。时间过程实验表明,二羟基苯衍生物对胸腺嘧啶合酶的抑制发生在胸腺嘧啶掺入抑制之后,这表明一个更早的事件对DNA合成的抑制至关重要。通过使用一种新的情境试验,测量完整细胞中[5-3H]尿苷释放的[3H]水,我们能够证明最早的生化事件之一是核糖核苷酸还原酶的抑制,并且胸苷酯合成酶的抑制延迟了大约30分钟,可能通过对核糖核苷酸还原酶的影响间接介导。
Novel antitumor agents related to levodopa and dopamine exhibit a selective and rapid inhibition of DNA synthesis as measured by thymidine incorporation. Our investigations have attempted to determine the biochemical basis of the selective inhibition of tumor cells and in this present study we examined the effects of these agents on thymidylate synthase. The dihydroxybenzene derivatives were found to inhibit thymidylate synthasein situat concentrations ranging between 100 and 800 μM. The quinols did not inhibit partially purified thymidylate synthase, although the oxidized quinones did cause inhibition at concentrations between 10 and 100 μM. Time course experiments suggested that the inhibition of thymidylate synthasein situby the dihydroxybenzene derivatives occurs after the inhibition of thymidine incorporation, indicating that an earlier event was critical to the inhibition of DNA synthesis. With the use of a novelin situassay which measured the release of [3H]water from [5-3H] uridine in intact cells, we were able to show that one of the earliest biochemical events is the inhibition of ribonucleotide reductase and that the inhibition of thymidylate synthase, which is delayed by approximately 30 min, was indirectly mediated possibly through effects on ribonucleotide reductase.
人淋巴母细胞(CCRF-CEM 细胞)连续培养物对化疗药物的体外反应。
DOI: --
发表时间: 1967
影响因子: 5.8
作者:
G. Foley;H. Lazarus
通讯作者: H. Lazarus
DOI: 10.1021/bi00599a021
发表时间: 1978
期刊: Biochemistry
影响因子: 2.9
作者:
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3,4-二羟基苄胺:一种改进的多巴胺类似物,部分通过抑制 DNA 聚合酶的氧化产物对黑色素瘤细胞具有细胞毒性。
DOI: 10.1111/1523-1747.ep12531751
发表时间: 1983
期刊: The Journal of investigative dermatology
影响因子: --
作者:
FitzGerald,GB;Wick,MM
通讯作者: Wick,MM
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DOI: --
发表时间: 1980
影响因子: 4.8
作者:
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与左旋多巴和多巴胺相关的抗肿瘤药物对核糖核苷酸还原酶的抑制。
DOI: 10.1016/0006-2952(85)90043-7
发表时间: 1985
影响因子: 5.8
作者:
FitzGerald,GB;Wick,MM
通讯作者: Wick,MM