首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >Difference in the effects of surfactants and albumin on the extent of deaggregation of purpurin 18, a model of hydrophobic photosensitizer
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Difference in the effects of surfactants and albumin on the extent of deaggregation of purpurin 18, a model of hydrophobic photosensitizer

机译:表面活性剂和白蛋白对紫光蛋白18(疏水性光敏剂的模型)解聚程度影响的差异

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摘要

Absorption, fluorescence and light scattering techniques have been used to monitor the deaggregation of purpurin 18, a model of hydrophobic photosensitizers for photodynamic therapy, in aqueous micelles, microemulsions and human serum albumin. The aggregates present in the neat aqueous solvents are found to undergo deaggregation in these media to different extents. Aqueous micelles and microemulsions are found to induce a complete deaggregation whereas the process is only partial in albumins. This could be an indication of the fact that such hydrophobic photosensitizers are likely to be aggregated in the blood stream, but are probably in monomeric form, upon cellular uptake. The formation of surfactant-induced aggregates at intermediate concentrations of the positively charged CTAB is also observed and is explained in the light of electrostatic interactions between the fluorophore and the surfactant. (c) 2006 Elsevier B.V. All rights reserved.
机译:吸收,荧光和光散射技术已用于监测紫胶素18在水性胶束,微乳状液和人血清白蛋白中的分解,紫胶素18是用于光动力疗法的疏水性光敏剂模型。发现存在于纯净水性溶剂中的聚集体在这些介质中经历不同程度的解聚。发现胶束和微乳状液可引起完全解聚,而该过程在白蛋白中仅是部分的。这可能表明以下事实,即这种疏水性光敏剂在细胞摄取后很可能在血流中聚集,但可能呈单体形式。还观察到在带正电荷的CTAB的中间浓度下表面活性剂诱导的聚集体的形成,并根据荧光团与表面活性剂之间的静电相互作用进行了解释。 (c)2006 Elsevier B.V.保留所有权利。

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