Singlet oxygen generation and dark toxicity of a nido- and a closo-carboranylporphyrin

Singlet oxygen generation and dark toxicity of a nido- and a closo-carboranylporphyrin
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硝基卟啉和邻碳硼烷基卟啉的单线态氧生成和暗毒性

DOI:
10.1117/12.531903
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发表时间:
2004
期刊:
Biochemistry (Moscow)
影响因子:
--
通讯作者:
M. Rodgers
M. Rodgers
中科院分区:
--
文献类型:
--
作者:
M. Vicente;V. Gottumukkala;A. Wickramasinghe;M. Anikovsky;M. Rodgers

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暗毒性和单线态氧量子产率的锌(II)配合物的nido-和closo-carboranylporphyrins 4和5的报告。两种碳硼烷基卟啉对V79仓鼠肺成纤维细胞均显示出非常低的毒性(IC 50> 500 μM),显示出相似的吸收和荧光发射光谱,并且是单线态氧的有效产生者(CD 3 OD中的量子阱为0.72,CHCl 3中的量子阱为0.45,分别为4和5)。我们的研究结果表明,通过亚甲基连接到meso-phenyl基团的nido-或closo-carborane笼的存在下,不实质上改变卟啉大环的光敏特性。碳酰卟啉在硼中子俘获治疗(BNCT)和光动力治疗(PDT)治疗恶性脑肿瘤中具有双重应用前景。
The dark toxicity and singlet oxygen quantum yields of the zinc(II) complexes of the nido- and closo-carboranylporphyrins 4 and 5 are reported. Both carboranylporphyrins show very low toxicity towards V79 hamster lung fibroblast cells (IC50 > 500 μM), display similar absorption and fluorescence emission spectra, and are efficient producers of singlet oxygen (quantum uilds of 0.72 in CD3OD and 0.45 in CHCl3 were determined for 4 and 5, respectively). Our results indicate that the presence of nido- or closo-carborane cages bound via methylene linkages to the meso-phenyl groups, do not substantially alter the photosensitizing properties of porphyrin macrocycles. It is suggested that carboanylporphyrins could have dual application in the boron neutron capture therapy (BNCT) and photodynamic therapy (PDT) treatment of malignant brain tumors.
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