Investigations into mechanisms of the interaction between platinum complexes and irradiation at low (∼2 Gy) doses in hypoxic cells: I. Role of single‐strand breaks

Investigations into mechanisms of the interaction between platinum complexes and irradiation at low (∼2 Gy) doses in hypoxic cells: I. Role of single‐strand breaks
复制标题

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:
--
复制
发表时间:
1993
期刊:
影响因子:
--
通讯作者:
K. Skov
K. Skov
中科院分区:
--
文献类型:
--
作者:
P. Walter;M. Korbelik;I. Spadinger;K. Skov

文献摘要

参考文献

被引文献

相似文献

由于肿瘤的缺氧部分的抗性,需要与分次放射疗法(102戈伊)结合使用的放射增敏剂。据报道,在缺氧细胞中顺铂(顺-二氨二氯铂(II))和低剂量辐射之间存在显著的选择性相互作用[Korbelik和Skov:Radiat Res 119:145-156,1989]。第一个假设可能是顺铂干扰辐射诱导的DNA断裂的修复,反之亦然。为了研究这些可能的相互作用机制,研究了在低剂量X射线照射缺氧细胞之前和之后改变顺铂的递送时间的影响。使用细胞分析仪对呈指数生长的中国仓鼠卵巢(CHO)和V79细胞在低剂量X射线照射后的存活率进行了评估,以确定单个细胞的位置。在暴露于顺铂(2.5 μM,1小时)和低氧低剂量X射线的细胞中,无论时间安排如何(照射后8小时或照射前3小时),显著增强比(ER; CHO为1.7,V79为1.8)均未降低。由于单链断裂(SSB)的修复是快速的,似乎干扰其修复并不是相互作用的主要贡献。通过观察1)集落大小间接检查长期损伤(或错误修复):用低剂量X射线(1戈伊,缺氧)照射或用顺铂(2.5 μM)处理的CHO细胞产生的集落小于对照组;提供了联合处理的数据,以及2)缺氧CHO细胞中的染色体畸变:用于交换的ER与存活数据一致。© 1993 Wiley-Liss公司。
There is a need for radiosensitizers, to be used in conjunction with fractionated radiotherapy (∼2 Gy), because of the resistance of the hypoxic portions of tumors. A marked selective interaction between cisplatin (cis-diamminedichloroplatinum (II)) and low doses of radiations was reported in hypoxic cells [Korbelik and Skov: Radiat Res 119:145–156, 1989]. A first hypothesis might be the interference with repair of radiationinduced DNA breaks by cisplatin, or vice versa. In order to study these possible mechanisms of interaction, the effects of changing the delivery time of cisplatin before and after low-dose X-irradiation of hypoxic cells were investigated. Survival after low doses of X-rays of both Chinese hamster ovary (CHO) and V79 cells growing exponentially was assessed using the Cell Analyzer for location of individual cells. In cells exposed to cisplatin (2.5 μM for 1 hr) and low doses of X-rays in hypoxia, the pronounced enhancement ratio (ER; 1.7 in CHO, 1.8 in V79) did not decrease regardless of scheduling (up to 8 hr after or 3 hr before irradiation). Since the repair of single-strand breaks (SSB) is rapid, it appears that interference with their repair is not a major contribution to the interaction. The longer-term damage (or misrepair) was examined indirectly by looking at 1) colony size: CHO cells which were irradiated with low doses of X-rays (1 Gy, hypoxia) or treated with cisplatin (2.5 μM) produced smaller colonies than controls; the data for the combined treatments are presented, and 2) chromosome aberrations in hypoxic CHO cells: the ER for exchanges agrees with the survival data. © 1993 Wiley-Liss, Inc.
DOI: 10.1016/s0021-9258(18)42242-9
发表时间: 1992-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
Edward N. Hughes;B. N. Engelsberg;Paul C. Billings
通讯作者: Edward N. Hughes;B. N. Engelsberg;Paul C. Billings
顺铂在每部分低辐射剂量下对小鼠肿瘤中的缺氧细胞缺乏差异放射增敏作用。
DOI: --
发表时间: 1993
期刊: Radiation research
影响因子: 3.4
作者:
Sun,JR;Brown,JM
通讯作者: Brown,JM
低剂量缺氧细胞的放射增敏。
DOI: 10.1016/0360-3016(86)90229-4
发表时间: 1986
期刊: International journal of radiation oncology, biology, physics
影响因子: --
作者:
Skarsgard,LD;Harrison,I;Durand,RE;Palcic,B
通讯作者: Palcic,B
DOI: 10.1016/0360-3016(87)90320-8
发表时间: 1987
期刊: International journal of radiation oncology, biology, physics
影响因子: --
作者:
Tanabe,M;Godat,D;Kallman,RF
通讯作者: Kallman,RF
在 C3H/Km 小鼠模型系统中,分次照射和顺式二氯二氨铂 (II) 组合的治疗效果依赖于时间表。
DOI: --
发表时间: 1988
期刊: Cancer research
影响因子: 11.2
作者:
Kanazawa,H;Rapacchietta,D;Kallman,RF
通讯作者: Kallman,RF