Evaluation of miR-21 Inhibition and its Impact on Cancer Susceptibility Candidate 2 Long Noncoding RNA in Colorectal Cancer Cell Line

Document Type : Original Article

Authors
Miganoosh Simonian 1
Mohammadreza Sharifi 1
Reza Nedaeinia 2
Meysam Mosallaie 1
Sharifeh Khosravi 1
Amir Avan 3
Majid Ghayour-Mobarhan 4
Hadi Bagheri 1
Rasoul Salehi 5
1 Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
3 Molecular Medicine Group, Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
4 Biochemistry of Nutrition Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
5 Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences; Acquired Immunodeficiency Research Center, Isfahan University of Medical Sciences; Gerfa Namayesh Azmayesh (GENAZMA) Science and Research Institute, Isfahan, Iran
Abstract
Background: Both microRNAs (miRNAs) and long noncoding RNAs (lncRNAs) have been shown to have a critical role in the regulation of cellular processes such as cell growth and apoptosis, as well as cancer progression and metastasis. lncRNAs are aberrantly expressed in many diseases including cancer. Although it is well known that miRNAs can target a large number of protein-coding genes, little is known whether miRNAs can also target lncRNAs. In the present study, we determine whether miR-21 can regulate lncRNA cancer susceptibility candidate 2 (CASC2) in colorectal cancer. Materials and Methods: LS174T cells were transfected with locked nucleic acid (LNA)-anti-miR-21 and scrambled LNA for 24, 48 and 72 h. The expression of miR-21 and lncCASC2 was evaluated by quantitative reverse transcriptase polymerase chain reaction. Results: However, contrary to what we expected and reported by others, lncCASC2 quantity was significantly reduced in LNA treated LS174T cells compared to the scrambled treated and normal untreated cells (P < 0.05). Conclusion: The interaction of miRNA and lncRNA are not as simple as suggested by other reports. Moreover, it could be complex molecular mechanisms underlying the communication of various noncoding RNA elements.

Keywords

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Advanced Biomedical Research
Volume 2018, January
January 2018
Pages 1-6