Abstract
Biological applications of water-soluble hexa(sulfobutyl)fullerene (FC4S) are reviewed. It was synthesized in a yield of 80–85% by the treatment of C60 in dimethoxyethane (DME) with sodium naphthalide (10 equiv.) at 25 °C, followed by reacting the resulting hexaanionic fullerene intermediates with an excess of 1,4-butane sultone (15 equiv.). FC4S showed an enhanced superoxide radical (O − ·2 ) scavenging activity and suppression efficiency against the superoxide-induced ferricytochrome c reduction under physiologic conditions, as compared with those of fullerenols at a dose level of 100 μm. For example, a profound suppression efficiency of 60 and 96% was detected at a dose level of 50 and 10011m, respectively. Aggregation behaviors of FC4S molecules in aqueous solution were investigated using SAXS (small-angle X-ray scattering) and SANS (small-angle neutron scattering) techniques. We concluded that the aggregation size and shape of FC4S nanoparticles with the radius of gyration, R g, of 18.9–19.1 Å remain relatively unchanged with the variation of concentration in the concentration range of 0.35–26.0 mM. The phenomena were correlated to a high total surface area of nanoparticles and interfacial accessability of fullerene cages to reactive oxygen radical species.
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Chi, Y., Canteenwala, T., Chen, H.H.C., Jeng, US., Lin, TL., Chiang, L.Y. (2002). Free Radical Scavenging and Photodynamic Functions of Micelle-like Hydrophilic Hexa(sulfobutyl)fullerene (FC4S). In: Ōsawa, E. (eds) Perspectives of Fullerene Nanotechnology. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9598-3_15
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DOI: https://doi.org/10.1007/978-94-010-9598-3_15
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