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Affinity capillary electrophoresis for identification of active drug candidates in myotonic dystrophy type 1

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A Correction to this article was published on 15 November 2018

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Abstract

Myotonic dystrophy type 1 (DM1) is an autosomal dominantly inherited degenerative disease with a slow progression. At the present, there is no commercially available treatment, but sustained effort is currently undertaken for the development of a promising lead compound. In the present paper we report the development of a fast, versatile, and cost-effective affinity capillary electrophoresis (ACE) method for the screening and identification of potential drug candidates targeting pathological ARN probes relevant for DM1. The affinity studies were conducted in physiologically relevant conditions using 50 mM HEPES buffer (pH 7.4) in a fused silica capillary dynamically coated with poly(ethylene oxide), by testing a library of potential ligands against (CUG)50 RNA as target probe with a total run time of 4–5 h/ligand. For the most promising ligands, their affinity parameters were assessed and some results formerly reported on the affinity of pentamidine (PTMD) and neomycin against CUG repeats were confirmed. To the best of the authors’ knowledge, the estimated binding stoichiometry for some of the tested compounds (i.e., ~ 121:1 for PTMD against the tested RNA probe) is reported for the first time. Additionally, the potential of a novel pentamidine like compound, namely 1,2-ethane bis-1-amino-4-benzamidine (EBAB) with much lower in vivo toxicity than its parent compound has also been confirmed studying its effect on a live cell model by fluorescence microscopy. Further tests, such as the evaluation of the rescue in the mis-splicing of the involved genes, can be performed to corroborate the potential therapeutic value of EBAB in DM1 treatment.

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Change history

  • 15 November 2018

    Unfortunately the name of Jean Jacques Vanden Eynde was missing as co-author of this contribution. The correct list of authors is: Ioan O. Neaga, Stephanie Hambye, Ede Bodoki, Claudio Palmieri, Jean Jacques Vanden Eynde, Eugénie Ansseau, Alexandra Belayew, Radu Oprean, Bertrand Blankert.

  • 15 November 2018

    Unfortunately the name of Jean Jacques Vanden Eynde was missing as co-author of this contribution. The correct list of authors is: Ioan O. Neaga, Stephanie Hambye, Ede Bodoki, Claudio Palmieri, Jean Jacques Vanden Eynde, Eug?nie Ansseau, Alexandra Belayew, Radu Oprean, Bertrand Blankert.

  • 15 November 2018

    Unfortunately the name of Jean Jacques Vanden Eynde was missing as co-author of this contribution. The correct list of authors is: Ioan O. Neaga, Stephanie Hambye, Ede Bodoki, Claudio Palmieri, Jean Jacques Vanden Eynde, Eug��nie Ansseau, Alexandra Belayew, Radu Oprean, Bertrand Blankert.

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Funding

The authors are grateful for financial support from the ABMM (Belgium) and “Iuliu Hațieganu” University of Medicine and Pharmacy (Cluj-Napoca, Romania) through the doctoral research project PCD #7690/78/15.04.2016. Ioan Neaga had a co-financing from the University of Mons.

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Neaga, I.O., Hambye, S., Bodoki, E. et al. Affinity capillary electrophoresis for identification of active drug candidates in myotonic dystrophy type 1. Anal Bioanal Chem 410, 4495–4507 (2018). https://doi.org/10.1007/s00216-018-1107-6

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  • DOI: https://doi.org/10.1007/s00216-018-1107-6

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