Luminescent rhenium(I) polypyridine fluorous complexes as novel trifunctional biological probes

Inorg Chem. 2011 Oct 3;50(19):9465-71. doi: 10.1021/ic201143f. Epub 2011 Aug 30.

Abstract

We present the synthesis, characterization, and photophysical properties of three luminescent rhenium(I) polypyridine fluorous complexes [Re(Me(2)bpy)(CO)(3)(L)](PF(6)) (Me(2)bpy = 4,4'-dimethyl-2,2'-bipyridine; L = 3-amino-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-NH(2)) (1), 3-isothiocyanato-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-NCS) (2), 3-ethylthioureidyl-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-TU-C(2)H(5)) (3)). The isothiocyanate complex 2 has been used to label bovine serum albumin (BSA) and glutathione (GSH). The photophysical properties of the resultant bioconjugates have been studied. The isolation of the luminescent fluorous rhenium-GSH conjugate from a mixture of 20 amino acids has been demonstrated using fluorous solid-phase extraction (FSPE). Additionally, the cytotoxicity of complexes 1 and 3 toward HeLa cells has been examined by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide (MTT) assay. The cellular uptake properties of complex 3 have also been investigated by laser-scanning confocal microscopy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Survival / drug effects
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry*
  • Coordination Complexes / pharmacology
  • Fluorescent Dyes / chemical synthesis
  • Fluorescent Dyes / chemistry*
  • Fluorescent Dyes / pharmacology
  • Formazans / chemistry
  • Glutathione / isolation & purification
  • HeLa Cells
  • Humans
  • Magnetic Resonance Spectroscopy
  • Microscopy, Confocal
  • Models, Molecular
  • Molecular Structure
  • Pyridines / chemical synthesis*
  • Pyridines / chemistry*
  • Pyridines / pharmacology
  • Rhenium / chemistry
  • Spectrometry, Mass, Electrospray Ionization
  • Spectroscopy, Fourier Transform Infrared
  • Tetrazolium Salts / chemistry

Substances

  • Coordination Complexes
  • Fluorescent Dyes
  • Formazans
  • Pyridines
  • Tetrazolium Salts
  • MTT formazan
  • Rhenium
  • Glutathione