Guanidinium-appended γ-cyclodextrin: efficient fullerene solubiliser for enhanced photodynamic therapy†

IF 6 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Mervyn Ho Kong Man, Henry Chak Man Yau and Kou Okuro
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引用次数: 0

Abstract

Efficient solubilisation of fullerenes in aqueous media is crucial for their photodynamic therapy (PDT) applications. We demonstrated the efficacy of guanidinium-appended γ-cyclodextrin (CDGu) as a novel solubiliser for C60 and C70 fullerenes, achieving exceptionally high aqueous concentrations of 3.1 mM and 0.37 mM, respectively, through simple mechanical mixing in the presence of Na+ ions. The resulting complexes, CDGu⊃C60 and CDGu⊃C70, enabled efficient fullerene transfer to cell membranes, a critical factor for PDT efficacy. Notably, CDGu⊃C70 exhibited excellent singlet oxygen (102) generation (quantum yield ΦΔ = 0.77 at 630 nm) and induced >90% cell death with only 5 min of white light exposure in vitro. This research highlights the importance of molecular dispersion in enhancing fullerenes’ photosensitising activity and membrane transfer, potentially advancing fullerene-based PDT approaches.

Abstract Image

胍-附加γ-环糊精:增强光动力治疗的高效富勒烯增溶剂
富勒烯在水介质中的有效溶解是其光动力治疗(PDT)应用的关键。我们证明了胍-附加γ-环糊精(CDGu)作为C60和C70富勒烯的新型增溶剂的有效性,通过在Na+离子存在下的简单机械混合,其水溶液浓度分别达到3.1 mM和0.37 mM。所得到的复合物CDGu、C60和CDGu、C70使富勒烯有效地转移到细胞膜上,这是PDT功效的一个关键因素。值得注意的是,CDGu、C70表现出优异的单线态氧(102)生成(量子产率ΦΔ = 0.77 at 630 nm),并且在体外仅5分钟的白光照射下诱导90%的细胞死亡。这项研究强调了分子分散在增强富勒烯光敏活性和膜转移方面的重要性,有可能推进基于富勒烯的PDT方法。
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来源期刊
Materials Chemistry Frontiers
Materials Chemistry Frontiers Materials Science-Materials Chemistry
CiteScore
12.00
自引率
2.90%
发文量
313
期刊介绍: Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome. This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.
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