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Targeting miR‑155‑5p and miR‑221‑3p by peptide nucleic acids induces caspase‑3 activation and apoptosis in temozolomide‑resistant T98G glioma cells.
- Source :
-
International journal of oncology [Int J Oncol] 2019 Jul; Vol. 55 (1), pp. 59-68. Date of Electronic Publication: 2019 May 23. - Publication Year :
- 2019
-
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.
- Subjects :
- Antineoplastic Agents, Alkylating pharmacology
Apoptosis drug effects
Caspase 3 genetics
Cell Line, Tumor
Cell Proliferation drug effects
Drug Resistance, Neoplasm genetics
Drug Synergism
Enzyme Activation drug effects
Glioma enzymology
Humans
MicroRNAs genetics
Peptide Nucleic Acids genetics
Caspase 3 metabolism
Glioma drug therapy
Glioma genetics
MicroRNAs antagonists & inhibitors
Peptide Nucleic Acids pharmacology
Temozolomide pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1791-2423
- Volume :
- 55
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- International journal of oncology
- Publication Type :
- Academic Journal
- Accession number :
- 31180529
- Full Text :
- https://doi.org/10.3892/ijo.2019.4810