A Red-Light-Activated Ruthenium-Caged NAMPT Inhibitor Remains Phototoxic in Hypoxic Cancer Cells.

A Red-Light-Activated Ruthenium-Caged NAMPT Inhibitor Remains Phototoxic in Hypoxic Cancer Cells.
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DOI:
10.1002/anie.201703890
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发表时间:
2017-09-11
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Bonnet S
Bonnet S
中科院分区:
其他
文献类型:
--
作者:
Lameijer LN;Ernst D;Hopkins SL;Meijer MS;Askes SHC;Le Dévédec SE;Bonnet S

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我们描述了两种水溶性钌络合物,[1]Cl2和[2]Cl2,它们在低剂量(21 J cm−2)红光下以不依赖于氧的方式光解离释放细胞毒性烟酰胺磷酸核糖基转移酶(NAMPT)抑制剂。使用特定的 NAMPT 活性测定,红光激活 [2]Cl2 时,抑制效力增加了 18 倍,而 [1]Cl2 是热不稳定的。首次可以在缺氧(1% O2)下测试这些光笼化合物的暗光和红光诱导的细胞毒性。在皮肤 (A431) 和肺癌 (A549) 癌细胞中,无论细胞是用 1% 还是 21% O2 培养和照射,[2]Cl2 红光照射后细胞毒性增加 3 至 4 倍。这些结果证明了光激活化疗对缺氧癌细胞的潜力,其中依赖于氧激活的经典光动力疗法效率很低。
We describe two water‐soluble ruthenium complexes, [1]Cl2 and [2]Cl2, that photodissociate to release a cytotoxic nicotinamide phosphoribosyltransferase (NAMPT) inhibitor with a low dose (21 J cm−2) of red light in an oxygen‐independent manner. Using a specific NAMPT activity assay, up to an 18‐fold increase in inhibition potency was measured upon red‐light activation of [2]Cl2, while [1]Cl2 was thermally unstable. For the first time, the dark and red‐light‐induced cytotoxicity of these photocaged compounds could be tested under hypoxia (1 % O2). In skin (A431) and lung (A549) cancer cells, a 3‐ to 4‐fold increase in cytotoxicity was found upon red‐light irradiation for [2]Cl2, whether the cells were cultured and irradiated with 1 % or 21 % O2. These results demonstrate the potential of photoactivated chemotherapy for hypoxic cancer cells, in which classical photodynamic therapy, which relies on oxygen activation, is poorly efficient.
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