Biopolym. Cell. 2014; 30(6):448-453.
Genomics, Transcriptomics and Proteomics
Influence of EMAP II, IFN-α2b and its medicinal preparations on the MGMT protein amount in human cells in vitro
1Kotsarenko K. V., 1Lylo V. V., 1Ruban T. P., 1Macewicz L. L., 1Kornelyuk A. I., 1Chernykh S. I., 1Lukash L. L.
  1. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680


Aim. To study the effect of EMAP II, IFN-α2b and its medicinal preparations on the amount of O6-methylguanine-DNA methyltransferase (MGMT) protein in human cells in vitro. Methods. The human cells of 4BL and Hep-2 lines were treated with the purified recombinant proteins EMAP II, IFN-α2b and its commercial me dicinal preparations. Changes in the MGMT gene expression were studied at a protein level by Western blot analysis. Results. Treatment of Hep-2 and 4BL cells with EMAP II at the concentrations of 0.02 mg/ml and 2 mg/ml respectively led to induction of the MGMT gene expression. EMAP II at the concentrations of 0.2–20 g/ml caused decrease of the MGMT protein amount in Hep-2 cells. The regulating activity of EMAP II was also observed for MARP (anti-Methyltransferase Antibody Recognizable Protein). IFN-α2b and Laferon-PharmBiotek with the activity of 200 and 2000 IU/ml were shown to cause an increase of the MGMT protein amount in Hep-2 cells. Conclusions. The purified recombinant proteins EMAP II and IFN-α2b which are substrates for the medicinal preparations influenced on the amount of MGMT protein in the human cell cultures in a concentration-dependent manner. At the same time the effect of medicinal preparations differs from that of the purified protein IFN-α2b. Possibly it depends on the presence of stabilizing components in their compositions.
Keywords: MGMT, MARP, IFN-α2b, EMAP II, human cell cultures


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