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Pro-apoptotic Effects of S100A8 and S100A9 on human FIP1L1-PDGFRα+ Eosinophilic Leukemia Cells

  • Lee, Ji-Sook (Department of Clinical Laboratory Science, Wonkwang Health Science University)
  • Received : 2021.04.16
  • Accepted : 2021.06.14
  • Published : 2021.06.30

Abstract

The S100 family proteins act as inducers of cancer cell apoptosis and inflammatory mediators. This study examined the pro-apoptotic mechanism caused by S100A8 and S100A9 in human FIP1L1-PDGFRα-positive eosinophilic leukemia cells. S100A8 and S100A9 elicited the death of EoL-1 cells in a time and dose-dependent manner. The activation of PDGFRα was suppressed by a decrease in PDGFRα after treatment with S100A8 and S100A9. Cycloheximide, a translation inhibitor, suppressed PDGFRα expression from 1 h to 5 h, and a co-treatment with S100A8 and S100A9 boosted the decrease in expression. The phosphorylation and expression of STAT5 decreased after treatment with S100A8 and S100A9 in EoL-1 and imatinib-resistant (EoL-1-IR) cells. S100A8 and S100A9 induced the chemotaxis of EoL-1 cells but did not affect the chemoattraction of EoL-1-IR. These findings indicate the cell death mechanism due to S100 family proteins and the development of leukemia therapy using S100A8 and S100A9.

Keywords

Acknowledgement

This paper was supported by Wonkwang Health Science University in 2021.

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