HSA-based phosphorescent probe for two-photon in vitro visualization.
J Inorg Biochem
; 149: 108-11, 2015 Aug.
Article
em En
| MEDLINE
| ID: mdl-25864999
ABSTRACT
Two-photon microscopy reveals several advantages over conventional one since it provides higher spatial resolution as well as deeper penetration into the sample under study. The development of suitable two-photon probes is one of the most challenging tasks in this area. Here we present phosphorescent non-covalent adduct of human serum albumin and Au-Ag alkynyl-diphosphine complex, [Au14Ag4(C2Ph)12(PPh2C6H4PPh2)6][PF6]4, which exhibits high cross section of two-photon-induced luminescence (δTPE) within large near-infrared excitation wavelength region (700-800 nm) with maximum δTPE about 38 GM at 740 nm. This feature makes it a promising probe for multiphoton bioimaging as demonstrated by successful visualization of glioma C6 cells and various tissues by two-photon confocal microscopy both in planar and z-stacking modes. Additionally, the broad excitation region enables optimization of the signal-to-background auto-fluorescence ratio via variation of excitation wavelength.
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Base de dados:
MEDLINE
Assunto principal:
Substâncias Luminescentes
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Albuminas
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Compostos Organoáuricos
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article