Abstract:
:Synthesis, spectral properties, and photodynamic activity of water-soluble amino acid fullerene C60 derivatives (AFD) and four original AFD-PPa dyads, obtained by covalent addition of dye pyropheophorbide (PPa) to AFD, were studied. In aqueous solution, these AFD-PPa dyads form nanoassociates as a result of self-assembly. In this case, a significant change in the absorption spectra and strong quenching of the dye fluorescence in the structure of the dyads were observed. A comparison of superoxide or singlet oxygen generation efficiency of the studied compounds in an aqueous solution showed the photodynamic mechanism switching from type II (singlet oxygen generation of the native dye) to I type (superoxide generation of dyads). All dyads have pronounced phototoxicity on cells Hela with IC50 9.2 µM, 9.2 µM, 12.2 µM for dyads Val-C60-PPa, Ala-C60-PPa and Pro-C60-PPa, respectively. Such facilitation of type I photodynamic mechanism could be perspective against hypoxic tumors.
journal_name
Spectrochim Acta A Mol Biomol Spectroscauthors
Belik AY,Rybkin AY,Goryachev NS,Sadkov AP,Filatova NV,Buyanovskaya AG,Talanova VN,Klemenkova ZS,Romanova VS,Koifman MO,Terentiev AA,Kotelnikov AIdoi
10.1016/j.saa.2021.119885keywords:
["Fluorescence quenching","Fullerene","Photochemical activity","Photosensitizer","Pyropheophorbide","Water-soluble amino acid fullerene derivatives"]subject
Has Abstractpub_date
2021-11-05 00:00:00pages
119885eissn
1386-1425issn
1873-3557pii
S1386-1425(21)00461-3journal_volume
260pub_type
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