Deoxyamphimedine, a pyridoacridine alkaloid, damages DNA via the production of reactive oxygen species.

Deoxyamphimedine, a pyridoacridine alkaloid, damages DNA via the production of reactive oxygen species.
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DOI:
10.3390/md7020196
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发表时间:
2009-05-25
期刊:
影响因子:
5.4
通讯作者:
Barrows LR
Barrows LR
中科院分区:
医学2区
文献类型:
--
作者:
Marshall KM;Andjelic CD;Tasdemir D;Concepción GP;Ireland CM;Barrows LR

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海洋吡啶类化合物是一类具有11H-吡啶并[4,3,2-锰]吖啶骨架的芳香族化合物。吡啶类生物碱具有多种生物活性,包括细胞毒性、杀菌、杀菌、产生活性氧(ROS)和拓扑异构酶抑制等。这些活性往往依赖于对吡哆吖啶骨架的轻微修饰。在这里,我们证明,虽然结构上类似于新苯并胺和苯并咪啶,但脱氧苯丙胺的生物活性有很大的不同。脱氧苯丙胺在体外通过产生活性氧来损伤DNA,而不依赖于拓扑异构酶。在低氧条件下,随着还原剂的去除和抗氧化剂的存在,其活性降低。脱氧苯丙胺在对单链或双链DNA断裂敏感的细胞中也显示出增强的毒性,这与体外活性一致。
Marine pyridoacridines are a class of aromatic chemicals that share an 11H-pyrido[4,3,2-mn]acridine skeleton. Pyridoacridine alkaloids display diverse biological activities including cytotoxicity, fungicidal and bactericidal properties, production of reactive oxygen species (ROS) and topoisomerase inhibition. These activities are often dependent on slight modifications to the pyridoacridine skeleton. Here we demonstrate that while structurally similar to neoamphimedine and amphimedine, the biological activity of deoxyamphimedine differs greatly. Deoxyamphimedine damages DNA in vitro independent of topoisomerase enzymes through the generation of reactive oxygen species. Its activity was decreased in low oxygen, with the removal of a reducing agent and in the presence of anti-oxidants. Deoxyamphimedine also showed enhanced toxicity in cells sensitive to single or double strand DNA breaks, consistent with the in vitro activity.
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