Adv Pharm Bull. 2020;10(2): 307-314.
doi: 10.34172/apb.2020.037
PMID: 32373501
PMCID: PMC7191235
Scopus ID: 85088700634
  Abstract View: 394
  PDF Download: 286

Research Article

Interleukin-6, -8, and TGF-β Secreted from Mesenchymal Stem Cells Show Functional Role in Reduction of Telomerase Activity of Leukemia Cell Via Wnt5a/β-Catenin and P53 Pathways

Ezzatollah Fathi 1 ORCID logo, Behnaz Valipour 2 ORCID logo, Zohreh Sanaat 3 ORCID logo, Hojjatollah Nozad Charoudeh 4 ORCID logo, Raheleh Farahzadi 3* ORCID logo

1 Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran.
2 Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
3 Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
4 Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
*Corresponding Author: Raheleh Farahzadi, Tel: +98-41-33343626, Fax: +98-41-33343844, E-mail: farahzadir@tbzmed.ac.ir


Purpose: The effect of mesenchymal stem cells (MSCs) on the immortality features of malignant cells, such as hematologic cancerous cells, are controversial, and the associated mechanisms are yet to be well understood. The aim of the present study was to investigate the in vitro effect of bone marrow-derived MSCs (BMSCs) on the chronic myeloid leukemia cell line K562 through telomere length measurements, telomerase activity assessments, and hTERT gene expression. The possible signaling pathways involved in this process, including Wnt-5a/β-catenin and P53, were also evaluated.

Methods: Two cell populations (BMSCs and K562 cell line) were co-cultured on transwell plates for 7 days. Next, K562 cells were collected and subjected to quantitative real-time PCR, PCR-ELISA TRAP assay, and the ELISA sandwich technique for telomere length, hTERT gene expression, telomerase activity assay, and cytokine measurement, respectively. Also, the involvement of the mentioned signaling pathways in this process was reported by real-time PCR and Western blotting through gene and protein expression, respectively.

Results: The results showed that BMSCs caused significant decreases in telomere length, telomerase activity, and the mRNA level of hTERT as a regulator of telomerase activity. The significant presence of interleukin (IL)-6, IL-8, and transforming growth factor beta (TGF-β) was obvious in the co-cultured media. Also, BMSCs significantly decreased and increased the gene and protein expression of β-catenin and P53, respectively.

Conclusion: It was concluded that the mentioned effects of IL-6, IL-8, and TGF-β cytokines secreted from MSCs on K562 cells as therapeutic agents were applied by Wnt-5a/β-catenin and P53 pathways

Keywords: Mesenchymal stem cells, Telomere length, Telomerase activity, Cytokines, Wnt5a/β-catenin, P53 signaling pathways
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Submitted: 20 Jun 2019
Revision: 08 Oct 2019
Accepted: 09 Oct 2019
ePublished: 18 Feb 2020
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