Leukemia-propagating cells demonstrate distinctive gene expression profiles compared with other cell fractions from patients with de novo Philadelphia chromosome-positive ALL.

Abstract:

:Relapse remains one of the major obstacles in Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ALL) even after allogeneic hematopoietic stem cell transplantation. The persistence of leukemia-propagating cells (LPCs) may lead to the recurrence of Ph+ALL. Using a xenograft assay, LPCs enrichment in the CD34+CD38-CD58- fraction in Ph+ALL was recently identified. A further cohort study indicated that the LPCs phenotype at diagnosis was an independent risk factor for relapse of Ph+ALL. However, little is known about the potential molecular mechanism of LPCs-mediated relapse. Therefore, the gene expression profiles of the sorted LPCs and other cell fractions from patients with de novo Ph+ALL were investigated using RNA sequencing (RNA-Seq). Most of the differentially expressed genes between the LPCs and other cell fractions were related to the regulation of the cell cycle and metabolism, as identified by the gene ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. Consistent with the RNA-Seq results, the mRNA levels of cell cycle-related genes, such as cyclin-dependent kinase 4, were significantly lower in the LPCs fraction than in other cell fractions. Moreover, the proportion of quiescent cells in LPCs was significantly higher than in other cell fractions. In summary, distinctive gene expression profiles and clusters, which were mostly related to the regulation of the cell cycle and metabolism, were demonstrated between LPCs and other cell fractions from patients with de novo Ph+ALL. Therefore, it would be beneficial to develop novel LPCs-based therapeutic strategies for Ph+ALL patients.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Zhao HY,Song Y,Cao XN,Qin YZ,Lai YY,Jiang H,Jiang Q,Huang XJ,Kong Y

doi

10.1007/s00277-018-3253-5

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

799-811

issue

5

eissn

0939-5555

issn

1432-0584

pii

10.1007/s00277-018-3253-5

journal_volume

97

pub_type

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