Selective cytotoxicity of rhodium metalloinsertors in mismatch repair-deficient cells.

Selective cytotoxicity of rhodium metalloinsertors in mismatch repair-deficient cells.
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DOI:
10.1021/bi2015822
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发表时间:
2011-12-20
期刊:
影响因子:
2.9
通讯作者:
Barton, Jacqueline K.
Barton, Jacqueline K.
中科院分区:
生物学3区
文献类型:
--
作者:
Ernst, Russell J.;Komor, Alexis C.;Barton, Jacqueline K.

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DNA中的错配在复制过程中自然发生,并且是内源性DNA损伤剂的结果,但是错配修复(MMR)途径在随后的复制轮之前起纠正错配的作用。铑金属插入物以高亲和力和特异性与DNA错配结合,代表了靶向细胞中错配的有希望的策略。在这里,我们研究的生物命运铑金属插入轴承dipyrinylamine辅助配体在MMR缺陷的细胞与那些MMR精通。这些复合物显示出加速的细胞摄取,这允许观察各种细胞反应,包括通过流式细胞术测定监测的细胞周期的破坏,以及通过染料排斥和半胱天冬酶抑制测定监测的坏死的诱导,这些反应优先发生在MMR缺陷细胞系中。这些细胞反应提供了对这类新型靶向抗癌药物选择性活性机制的深入了解。
Mismatches in DNA occur naturally during replication and as a result of endogenous DNA damaging agents, but the mismatch repair (MMR) pathway acts to correct mismatches before subsequent rounds of replication. Rhodium metalloinsertors bind to DNA mismatches with high affinity and specificity and represent a promising strategy to target mismatches in cells. Here we examine the biological fate of rhodium metalloinsertors bearing dipyridylamine ancillary ligands in cells deficient in MMR versus those that are MMR-proficient. These complexes are shown to exhibit accelerated cellular uptake which permits the observation of various cellular responses, including disruption of the cell cycle, monitored by flow cytometry assays, and induction of necrosis, monitored by dye exclusion and caspase inhibition assays, that occur preferentially in the MMR-deficient cell line. These cellular responses provide insight into the mechanisms underlying the selective activity of this novel class of targeted anti-cancer agents.
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