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Evaluation of the Temporal Window for Drug Delivery Following Ultrasound-Mediated Membrane Permeability Enhancement

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Abstract

Purpose

Ultrasound-induced cavitation facilitates cellular uptake of drugs via increased membrane permeability. Here, the purpose was to evaluate the duration of enhanced membrane permeability following ultrasound treatment in cell culture.

Procedures

Optical chromophores with fluorescence intensity increasing 100–1,000-fold upon intercalation with nucleic acids served as smart agents for reporting cellular uptake. Opticell chambers with a monolayer of C6 cells were subjected to ultrasound in the presence of microbubbles followed by varying delays between 0 and 24 h before addition of Sytox Green optical contrast agent. Micro- and macroscopic fluorescence were used for qualitative and quantitative analysis.

Results

Up to 25% of viable cells showed uptake of contrast agent with a half time of 8 h, with cellular uptake persisting even at 24 h. Only cells exposed to ultrasound showed the effect.

Conclusion

The temporal window of increased membrane permeability is much longer in these studies than previously suggested. This may have important repercussions for in vivo studies in which membrane permeability may be temporally separated from drug delivery.

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Acknowledgment

This study was supported by EC-project FP7-ICT-2007-1-213706 SonoDrugs and Foundation InNaBioSanté-project ULTRAFITT. The authors thank Franck Couillaud for the discussions and Roel Deckers and Sander Allon for the preliminary experiments with Opticell and intercalating dyes. Microscopy was performed in the Bordeaux Imaging Center of the Neurosciences Institute of the University of Bordeaux II; the help of Philippe Legros and Christel Poujol is acknowledged.

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Authors and Affiliations

  1. Laboratory for Molecular and Functional Imaging: from Physiology to Therapy, UMR5231 CNRS/University Victor Segalen Bordeaux, 146 rue Leo Saignat, Case 117, 33076, Bordeaux, France

    Anna Yudina, Matthieu Lepetit-Coiffé & Chrit T. W. Moonen

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  1. Anna Yudina
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  2. Matthieu Lepetit-Coiffé
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  3. Chrit T. W. Moonen
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Correspondence to Anna Yudina.

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Yudina, A., Lepetit-Coiffé, M. & Moonen, C.T.W. Evaluation of the Temporal Window for Drug Delivery Following Ultrasound-Mediated Membrane Permeability Enhancement. Mol Imaging Biol 13, 239–249 (2011). https://doi.org/10.1007/s11307-010-0346-5

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  • DOI: https://doi.org/10.1007/s11307-010-0346-5

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