Radiosensitization of DNA in presence of Pt(II)-based compounds

Radiosensitization of DNA in presence of Pt(II)-based compounds
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Pt(II) 基化合物存在下 DNA 的放射增敏

DOI:
10.1140/epjd/e2014-40846-7
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发表时间:
2014
期刊:
The European Physical Journal D
影响因子:
--
通讯作者:
Smialek M
Smialek M
中科院分区:
--
文献类型:
--
作者:
Smialek M

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为了评估这些药物的放射增敏能力,在铂(II)化合物存在的情况下对质粒DNA进行了X射线照射。在本研究中,使用pBR322质粒DNA来监测所选择的化合物诱导链断裂的有效性。样品在潜在放射增敏剂存在的情况下孵育:溴化铂(II)和顺式二胺二溴铂(II)。结果与一种常见的癌症化疗药物顺铂(II)进行了对比检验。结果发现,与仅含铂作为放射增敏剂的样品相比,溴化铂能显著增加照射样品中观察到的单链和双链断裂的形成水平,具有很小的化疗活性。建议的药物表现出比广泛使用的顺铂更高的放射敏感性,因此可能是治疗癌症的良好候选药物。
X-ray irradiation of plasmid DNA in presence of platinum (II)-based compounds was carried out in order to assess the radiosensitization capabilities of these drugs. In present investigations pBR322 plasmid DNA was used to monitor the effectiveness of chosen compounds in inducing strand breaks. Samples were incubated in the presence of potential radiosensitisers: platinum (II) bromide and cis-diamminedibromoplatinum (II). The results were examined against a common cancer chemotherapy drug cis-diamminedichloroplatinum (II). It was found that platinum (II) bromide can greatly increase the levels of single- and double-strand break formation observed in the irradiated samples with respect to the samples containing platinum as a radiosensitizer only, possessing very little chemotherapeutic activity. The suggested drugs exhibit much higher level of radiosensitivity than widely used cisplatin and thus may be good candidates for cancer treatment.
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