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Effects of a particular heptapeptide on the IFN-α-sensitive CML cells
Biomed Research International
  • Fulan Yang
  • Fangzhi Chen
  • Xinxing Wan
  • Xi Zhou
  • Meijuan Zhou
  • Hanchun Chen
  • Junjiang Fu
  • Dianzheng Zhang, Philadelphia College of Osteopathic Medicine
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Abstract: Using the phage display biopanning technique, we have previously identified a heptapeptide KLWVIPQ which specifically bind to the surface of the IFN-α sensitive but not the IFN-α-resistant CML cells. The effects of this heptapeptide to the IFN-α-sensitive CML cells were investigated in the present study. IFN-α-sensitive KT-1/A3 and IFN-α-resistant KT-1/A3R CML cells were transfected by pEGFP KLWVIPQ expression vector and/or induced by IFN-α. WST-1 cell proliferation assay, flow cytometry and western blotting were performed to determine the effects of this heptapeptide and/or IFN-α on CML cells. The viability of the KT-1/A3 cells w as inhibited and apoptosis was induced by either expression of the heptapeptide KLWVIPQ or IFN-α treatment with concurrent up-regulation of P53 and down-regulation of P210bcr/abl. However, these effects were not observed in the IFN-α-resistant KT-1/A3R cells. These results suggest that the heptapeptide KLWVIPQ shares a similar mechanism w ith IFN-α in the regulat ion of CML cell growth and apoptosis, implying that the heptapeptide KLWVIPQ could be a novel target to go further into mechanisms of IFN-α sensitivity and/or resistance in CML.

This article was published in Biomed Research International, August 2015.

The published version is available at

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Citation Information
Fulan Yang, Fangzhi Chen, Xinxing Wan, Xi Zhou, et al.. "Effects of a particular heptapeptide on the IFN-α-sensitive CML cells" Biomed Research International (2015)
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