Irradiation-enhanced binding of carboplatin to DNA.

Irradiation-enhanced binding of carboplatin to DNA.
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辐射增强卡铂与 DNA 的结合。

DOI:
10.1080/09553009514551611
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发表时间:
1995
影响因子:
2.6
通讯作者:
Wang,HJ
Wang,HJ
中科院分区:
医学3区
文献类型:
--
作者:
Yang,LX;Douple,E;Wang,HJ

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卡铂(3.6 mm)和鲑鱼精子DNA(3µg),双链(dsDNA)或变性单链(ssDNA),在缺氧或缺氧条件下照射(100 Gy)。药物和DNA分别在照射前、照射中和照射后混合,用原子吸收光谱法测定铂与DNA的结合。在低氧条件下,照射显著增加了卡铂与dsDNA的结合,但在类似的低氧条件下,照射没有增加卡铂与ssDNA的结合。在氧化条件下,辐照不会导致dsdna -铂结合增加。当dsDNA辐照后立即将卡铂加入dsDNA时,未观察到铂结合的增加。卡铂和dsDNA同时辐照后分别辐照,再混合辐照后,铂的结合略有增加,但不显著。氯化四胺铂(II)是一种无细胞毒性的铂化合物,在缺氧条件下照射后,铂- dna结合没有增加。结果表明,辐射增强卡铂与DNA的结合可能至少部分地负责卡铂的放射致敏,特别是在对卡铂敏感的细胞系中。
Carboplatin (3·6 mm) and salmon sperm DNA (3 µg), either double-stranded (dsDNA) or denatured single-stranded (ssDNA), were irradiated (100 Gy) under hypoxic or oxic conditions. The drug and DNA were mixed either before, during, or after irradiation, and platinum binding to DNA was measured using atomic absorption spectrometry. Irradiation significantly increased the binding of carboplatin to dsDNA under hypoxic conditions, but did not increase the binding of carboplatin to ssDNA under similar hypoxic conditions. Irradiation did not result in an increased dsDNA–platinum binding under oxic conditions. When carboplatin was added to dsDNA immediately following irradiation of dsDNA, no increase in platinum binding was observed. When carboplatin and dsDNA were irradiated simultaneously but separately and then mixed there appears to be a slight increase in platinum binding, but it was not significant. Tetra-ammineplatinum (II) chloride, a non-cytotoxic platinum compound, did not show an increase in platinum–DNA binding following irradiation under hypoxic conditions. The results suggest that radiation-enhanced carboplatin binding to DNA might be at least partly responsible for radiosensitization by carboplatin, especially in a cell line sensitive to carboplatin.
异环磷酰胺治疗非小细胞肺癌。
DOI: --
发表时间: 1989
影响因子: 4
作者:
D. Ettinger
通讯作者: D. Ettinger
卡铂可增强辐射引起的 DNA 单链断裂的产生和持久性。
DOI: --
发表时间: 1995
期刊: Radiation research.
影响因子: --
作者:
Yang,LX;Douple,EB;O'Hara,JA;Wang,HJ
通讯作者: Wang,HJ
单链断裂可导致质粒 DNA 在体外形成复杂的构型。
DOI: --
发表时间: 1987
期刊: International Journal of Radiation Biology and Related Studies in Physics Chemistry and Medicine
影响因子: --
作者:
C. Herskind
通讯作者: C. Herskind
缺氧细胞中铂配合物与低(~2 Gy)剂量照射之间相互作用的机制研究:I. 单链断裂的作用
DOI: --
发表时间: 1993
期刊:
影响因子: --
作者:
P. Walter;M. Korbelik;I. Spadinger;K. Skov
通讯作者: K. Skov
DOI: --
发表时间: 1977
影响因子: 1.7
作者:
T. Coquerelle;C. Sexauer
通讯作者: C. Sexauer