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Background : Glioblastoma multiforme (GBM) is the most aggressive form of malignant glioma and is also known as grade IV astrocytoma. This might be due to the presence of cancer stem cells with high pluripotency and ability of self-renewal. Recently, it has been reported that tumor stroma cells, including mesencyhmal stem cells (MSCs), secrete factors that affect cancer cell growth. Until now, the role of MSC secretomes in cancer stem cell pluripotency remains unclear. The aim of this study was to analyze the effect of MSC secretomes in conditioned medium (CM) on the expression of pluripotency markers of GBM cells. Methods : Umbilical cord-derived MSCs (UCSCs) were grown on serum-free alphaMEM for 24 hours to prepare the UCSC-CM. Human GBM T98G cells were treated with UCSC-CM for 24 hours. Following this treatment, expression of pluripotency markers SOX2, OCT4 and NANOG genes was analyzed using quantitative RT-PCR. Results : SOX2 and OCT mRNA expression was 4.7-fold (p=0.02) and 1.3-fold (p=0.03) higher in CM-treated cells compared to the control. However, there was no change in NANOG mRNA expression. This might be due to there being others factors regulating NANOG mRNA expression. Conclusions : UCSC-CM could affect the expression of SOX2 and OCT4 in human glioblastoma multiforme T98G cells. Further research is needed to elucidate the mechanism by which pluripotency markers are expressed when induced by the UCSC secretome.

f1000research

Analysis of pluripotency marker expression in human glioblastoma multiforme cells treated with conditioned medium of umbilical cord-derived mesenchymal stem cells