Journal of Fluorescence

, Volume 25, Issue 5, pp 1245–1250 | Cite as

Intracellular Monitoring of AS1411 Aptamer by Time-Resolved Microspectrofluorimetry and Fluorescence Imaging

  • Eva KočišováEmail author
  • Petr Praus
  • Jiří Bok
  • Stéphanie Bonneau
  • Franck Sureau


Time-resolved microspectrofluorimetry and fluorescence microscopy imaging—two complementary fluorescence techniques—provide important information about the intracellular distribution, level of uptake and binding/interactions inside living cell of the labeled molecule of interest. They were employed to monitor the “fate” of AS1411 aptamer labeled by ATTO 425 in human living cells. Confocal microspectrofluorimeter adapted for time-resolved intracellular fluorescence measurements by using a phase-modulation principle with homodyne data acquisition was employed to obtain emission spectra and to determine fluorescence lifetimes in U-87 MG tumor brain cells and Hs68 non–tumor foreskin cells. Acquired spectra from both the intracellular space and the reference solutions were treated to observe the aptamer localization and its interaction with biological structures inside the living cell. The emission spectra and the maximum emission wavelengths coming from the cells are practically identical, however significant lifetime lengthening was observed for tumor cell line in comparison to non–tumor one.


Aptamer AS1411 aptamer Intracellular fluorescence Fluorescence microscopy imaging Phase-modulation lifetime measurement 



Financial support from the Grant Agency of the Czech Republic project No. 15-06785S and from the Czech Ministry of Education Youth and Sports project No. 7AMB14FR020 is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Eva Kočišová
    • 1
    Email author
  • Petr Praus
    • 1
  • Jiří Bok
    • 1
  • Stéphanie Bonneau
    • 2
  • Franck Sureau
    • 2
  1. 1.Faculty of Mathematics and Physics, Institute of PhysicsCharles University in PraguePrague 2Czech Republic
  2. 2.Laboratoire Jean PerrinUniversité Pierre et Marie CurieParisFrance

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