Genetic network profiles associated with established resistance to ionizing radiation in acute promyelocytic leukemia cells and their extracellular vesicles

Oncol Rep. 2016 Feb;35(2):749-56. doi: 10.3892/or.2015.4471. Epub 2015 Dec 2.


Radiation-resistant acute promyelocytic leukemia (APL) cells present challenges to treatment, and the acquisition of resistance to ionizing radiation (IR) is a matter of clinical concern. However, little information is available on the behavior of radio-resistant APL in terms of gene expression profiles and intercellular communication. In this study, cDNA microarray and RT-PCR were used to analyze the intracellular genetic network and extracellular vesicles (EVs), respectively, in the established radio-resistant HL60 (Res-HL60) cell line. Significant changes in the expression of 7,309 known mRNAs were observed in Res-HL60 relative to control. In addition, 7 mRNAs were determined as targets because significant changes in the expression were observed using Ingenuity analysis software, confirming the quantitative RT-PCR. However, EVs from Res-HL60 cells did not include these target molecules. These results suggest that radio-resistant APL is regulated by the expression and suppression of specific molecules, and these molecules are not transferred between cells by EVs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Extracellular Vesicles / genetics*
  • Gene Regulatory Networks / genetics*
  • HL-60 Cells
  • Humans
  • Leukemia, Promyelocytic, Acute / genetics*
  • Oligonucleotide Array Sequence Analysis
  • Radiation Tolerance / genetics*
  • Real-Time Polymerase Chain Reaction
  • Reverse Transcriptase Polymerase Chain Reaction
  • Transcriptome