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Novel biophysical determination of miRNAs related to prostate and head and neck cancers

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Abstract

In this study we have chosen a new approach and characterized three miRNAs (miR-23a, miR-34a and miR-320a) related to prostate cancer and head and neck cancer by spectral (circular dichroic and UV-absorption spectra) and electrochemical (voltammetry at graphite and mercury electrodes) methods. The spectral and voltammetric results, reflecting different nucleotide sequences of miRNAs, were complemented by the results of DNAs(U) having the same oligonucleotide sequences as miRNAs. The effect of the substitution of ribose for deoxyribose was shown and structural diversity was confirmed. The stability of RNA and DNA(U) was studied using CD and UV-absorption spectroscopy and melting points were calculated. MiRNA-320a with the highest content of guanine provided the highest melting point. With respect to the rapid progress of miRNA electrochemical sensors, our results will be useful for the research and development of sensitive, portable and time-efficient miRNA sensors, which will be able to diagnose cancer and other diseases.

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Acknowledgments

This research was supported by the Central European Institute of Technology (CEITEC), Project CZ.1.05/1.1.00/02.0068, by the projects MUNI/A/1003/2013 and KONTAKT II (LH13053) of the Ministry of Education of the Czech Republic and IGA MZ NT14337-3/2013.

Conflict of interest

The authors declare they have no competing interests as defined by the European Biophysics Journal or other interests that might be perceived to influence the results and discussion reported in this paper.

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Authors and Affiliations

  1. Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic

    Kristyna Hudcova, Jaromir Gumulec & Michal Masarik

  2. Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic

    Libuse Trnkova

  3. Institute of Biophysics v.v.i., Academy of Sciences of the Czech Republic, Kralovopolska 135, 612 65, Brno, Czech Republic

    Iva Kejnovska & Michaela Vorlickova

  4. CEITEC, Brno University of Technology, Technicka 3058/10, 616 00, Brno, Czech Republic

    Kristyna Hudcova, Libuse Trnkova, Jaromir Gumulec, Rene Kizek & Michal Masarik

  5. CEITEC, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic

    Iva Kejnovska & Michaela Vorlickova

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  1. Kristyna Hudcova
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  2. Libuse Trnkova
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Correspondence to Michal Masarik.

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Hudcova, K., Trnkova, L., Kejnovska, I. et al. Novel biophysical determination of miRNAs related to prostate and head and neck cancers. Eur Biophys J 44, 131–138 (2015). https://doi.org/10.1007/s00249-015-1008-y

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  • DOI: https://doi.org/10.1007/s00249-015-1008-y

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