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Expression of P190 and P210 BCR/ABL1 in normal human CD34(+) cells induces similar gene expression profiles and results in a STAT5-dependent expansion of the erythroid lineage

Author:
  • Marcus Järås
  • Petra Johnels
  • Helena Ågerstam
  • Carin Lassen
  • Marianne Rissler
  • Patrik Edén
  • Jörg Cammenga
  • Tor Olofsson
  • Ole Weis Bjerrum
  • Johan Richter
  • Xiaolong Fan
  • Thoas Fioretos
Publishing year: 2009
Language: English
Pages: 367-375
Publication/Series: Experimental Hematology
Volume: 37
Issue: 3
Document type: Journal article
Publisher: Elsevier

Abstract english

Objective. The P190 and P210 BCR/ABL1 fusion genes are mainly associated with different types of hematologic malignancies, but it is presently unclear whether they are functionally different following expression in primitive human hematopoietic cells. Materials and Methods. We investigated and systematically compared the effects of retroviral P190 BCR/ABL1 and P210 BCR/ABL1 expression on cell proliferation, differentiation, and global gene expression in human CD34(+) cells from cord blood. Results. Expression of either P190 BCR/ABL1 or P210 BCR/ABL1 resulted in expansion of erythroid cells and stimulated erythropoietin-independent burst-forming unit-erythroid colony formation. By using a lentiviral anti-signal transducer and activator of transcription 5 (STAT5) short-hairpin RNA, we found that both P190 BCR/ABL1- and P210 BCR/ABL1-induced erythroid cell expansion were STAT5-dependent. Under in vitro conditions favoring B-cell differentiation, neither P190 nor P210 BCR/ABL1-expressing cells formed detectable levels of CD19-positive cells. Gene expression profiling revealed that P190 BCR/ABL1 and P210 BCR/ABL1 induced almost identical gene expression profiles. Conclusions. Our data suggest that the early cellular and transcriptional effects of P190 BCR/ABL1 and P210 BCR/ABL1 expression are very similar when they are expressed in the same human progenitor cell population, and that STAT5 is an important regulator of BCR/ABL1-induced erythroid cell expansion. (C) 2009 ISEH - Society for Hematology and Stem Cells. Published by Elsevier Inc.

Keywords

  • Hematology

Other

Published
  • ISSN: 1873-2399
Thoas Fioretos
E-mail: thoas.fioretos [at] med.lu.se

Principal investigator

Division of Clinical Genetics

+46 46 222 45 95

+46 70 334 33 67

BMC C13

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