Volume 9, Issue 4 (10-2019)                   Iran J Ped Hematol Oncol 2019, 9(4): 219-228 | Back to browse issues page

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Sanaei M, Kavoosi F, Mohammadi M, Khanezad M. Effect of 5-aza-2′-deoxycytidine on p16INK4a, p14ARF, p15INK4b Genes Expression, Cell Viability, and Apoptosis in PLC/PRF5 and MIA Paca-2 Cell Lines. Iran J Ped Hematol Oncol. 2019; 9 (4) :219-228
URL: http://ijpho.ssu.ac.ir/article-1-474-en.html
Student of Research Committee, Jahrom University of medical sciences, Jahrom, Iran
Abstract:   (1216 Views)
Background: Mammalian cell division is regulated by a complex includes cyclin-dependent kinases (Cdks) and cyclins, Cdk/cyclin complex. The activity of the complex is regulated by Cdk inhibitors (CKIs) compressing CDK4 (INK4) and CDK-interacting protein/kinase inhibitory protein (CIP/KIP) family. Hypermethylation of CKIs has been reported in various cancers. DNA methyltransferase inhibitors (DNMTIs), such as decitabine and 5-aza-2′-deoxycytidine (5-aza-CdR) can reactivate hypermethylated genes. The current study aimed to evaluate the effect of 5-aza-CdR on the expression of p16INK4a, p14ARF, p15INK4b genes, cell viability, and apoptosis in HCC PLC/PRF5 and pancreatic cancer MIA Paca-2 cell lines.
Materials and Methods: In this laboratory trial, both cell lines were treated with 5-aza-CdR (0, 1, 2.5, 5, 10, 15, and 20 μM) to determine cell viability and then with 3 μM to obtain cell apoptosis and relative gene expression. The cell viability, apoptosis, and genes expression were investigated by 3-[4, 5-dimethylthiazol-2-yl]-2, 5 diphenyl tetrazolium bromide (MTT) assay, flow cytometry, and Real-Time quantitative reverse-transcription polymerase chain reaction (qRT-PCR), respectively.
Results: 5-aza-CdR indicated significant inhibitory effect with all used concentrations (P = 0.003). The apoptotic effect of 5-aza-CdR on PLC/PRF5 cells in comparison to pancreatic cancer MIA Paca-2 cells was more significant (P= 0.001). Real-time quantitative PCR analysis revealed that treatment with 5-aza-CdR (3 μM) for 24 and 48h up-regulated p16INK4a, p14ARF, p15INK4b genes expression significantly(P=0.040).
Conclusion: Reactivation of p16INK4a, p14ARF, p15INK4b genes by 5-aza-CdR can induce apoptosis and inhibit cell viability in HCC, PLC/PRF5, and pancreatic cancer, MIA Paca-2, cell lines.
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Type of Study: Research | Subject: General
Received: 2019/06/2 | Accepted: 2019/08/6 | Published: 2019/10/18

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