Abstract
Considering the high mortality rate encountered in lung cancer, there is a strong need to explore new biomarkers for early diagnosis and also improved therapeutic targets to overcome this issue. The implementation of microRNAs as important regulators in cancer and other pathologies expanded the possibilities of lung cancer management and not only. MiR-21 represents an intensively studied microRNA in many types of cancer, including non-small cell lung cancer (NSCLC). Its role as an oncogene is underlined in multiple studies reporting the upregulated expression of this sequence in patients diagnosed with this malignancy; moreover, several studies associated this increased expression of miR-21 with a worse outcome within NSCLC patients. The same pattern is supported by the data existent in the Cancer Genome Atlas (TCGA). The carcinogenic advantage generated by miR-21 in NSCLC resides in the target genes involved in multiple pathways such as cell growth and proliferation, angiogenesis, invasion and metastasis, but also chemo- and radioresistance. Therapeutic modulation of miR-21 by use of antisense sequences entrapped in different delivery systems has shown promising results in impairment of NSCLC. Hereby, we review the mechanisms of action of miR-21 in cancer and the associated changes upon tumor cells together a focused perspective on NSCLC signaling, prognosis and therapy.
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Abbreviations
- NSCLC:
-
Non-small cell lung cancer
- PTEN:
-
Phosphatase and tensin homolog
- LUAD:
-
Lung adenocarcinoma
- TCGA:
-
The Cancer Genome Atlas
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Acknowledgements
This work was granted by Competitiveness Operational Program, 2014–2020, entitled “Clinical and economical impact of personalized targeted anti-microRNA therapies in reconverting lung cancer chemoresistance”—CANTEMIR, no. 35/01.09.2016, MySMIS 103375 and PhD fellowship (PCD 2017) no. 1300/51/13.01.2017 entitled, “Next Generation sequencing (NGS) in personalized medicine”.
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Bica-Pop, C., Cojocneanu-Petric, R., Magdo, L. et al. Overview upon miR-21 in lung cancer: focus on NSCLC. Cell. Mol. Life Sci. 75, 3539–3551 (2018). https://doi.org/10.1007/s00018-018-2877-x
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DOI: https://doi.org/10.1007/s00018-018-2877-x