Open Access

Targeting miR‑155‑5p and miR‑221‑3p by peptide nucleic acids induces caspase‑3 activation and apoptosis in temozolomide‑resistant T98G glioma cells

  • Authors:
    • Roberta Milani
    • Eleonora Brognara
    • Enrica Fabbri
    • Alex Manicardi
    • Roberto Corradini
    • Alessia Finotti
    • Jessica Gasparello
    • Monica Borgatti
    • Lucia Carmela Cosenza
    • Ilaria Lampronti
    • Maria Cristina Dechecchi
    • Giulio Cabrini
    • Roberto Gambari
  • View Affiliations

  • Published online on: May 23, 2019     https://doi.org/10.3892/ijo.2019.4810
  • Pages: 59-68
  • Copyright: © Milani et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study investigated the effects of the combined treatment of two peptide nucleic acids (PNAs), directed against microRNAs involved in caspase‑3 mRNA regulation (miR‑155‑5p and miR‑221‑3p) in the temozolomide (TMZ)‑resistant T98G glioma cell line. These PNAs were conjugated with an octaarginine tail in order to obtain an efficient delivery to treated cells. The effects of singularly administered PNAs or a combined treatment with both PNAs were examined on apoptosis, with the aim to determine whether reversion of the drug‑resistance phenotype was obtained. Specificity of the PNA‑mediated effects was analyzed by reverse transcription‑quantitative polymerase‑chain reaction, which demonstrated that the effects of R8‑PNA‑a155 and R8-PNA-a221 anti‑miR PNAs were specific. Furthermore, the results obtained confirmed that both PNAs induced apoptosis when used on the temozolomide‑resistant T98G glioma cell line. Notably, co‑administration of both anti‑miR‑155 and anti‑miR‑221 PNAs was associated with an increased proapoptotic activity. In addition, TMZ further increased the induction of apoptosis in T98G cells co‑treated with anti‑miR‑155 and anti‑miR‑221 PNAs.
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July 2019
Volume 55 Issue 1

Print ISSN: 1019-6439
Online ISSN:1791-2423

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APA
Milani, R., Brognara, E., Fabbri, E., Manicardi, A., Corradini, R., Finotti, A. ... Gambari, R. (2019). Targeting miR‑155‑5p and miR‑221‑3p by peptide nucleic acids induces caspase‑3 activation and apoptosis in temozolomide‑resistant T98G glioma cells. International Journal of Oncology, 55, 59-68. https://doi.org/10.3892/ijo.2019.4810
MLA
Milani, R., Brognara, E., Fabbri, E., Manicardi, A., Corradini, R., Finotti, A., Gasparello, J., Borgatti, M., Cosenza, L. C., Lampronti, I., Dechecchi, M. C., Cabrini, G., Gambari, R."Targeting miR‑155‑5p and miR‑221‑3p by peptide nucleic acids induces caspase‑3 activation and apoptosis in temozolomide‑resistant T98G glioma cells". International Journal of Oncology 55.1 (2019): 59-68.
Chicago
Milani, R., Brognara, E., Fabbri, E., Manicardi, A., Corradini, R., Finotti, A., Gasparello, J., Borgatti, M., Cosenza, L. C., Lampronti, I., Dechecchi, M. C., Cabrini, G., Gambari, R."Targeting miR‑155‑5p and miR‑221‑3p by peptide nucleic acids induces caspase‑3 activation and apoptosis in temozolomide‑resistant T98G glioma cells". International Journal of Oncology 55, no. 1 (2019): 59-68. https://doi.org/10.3892/ijo.2019.4810