Abstract
Although a number of transcription factors (TFs) have been identified that play a pivotal role in the development of hematopoietic lineages, only little is known about factors that may influence development and lineage commitment of natural killer (NK) or NK-like T (NKT)-cells. Obviously to fully appreciate the NK- and NKT-cell differentiation process, it is important to identify and characterize the TFs effecting the NK- and NKT-cell lineage. Furthermore, these TFs may play a role in NK- or NKT-cell leukemias, in which the normal differentiation program is presumably disturbed. The present study analyzed the expression of the following 13 TFs: AML1, CEBPA, E2A, ETS1, GATA1, GATA2, GATA3, IKAROS, IRF1, PAX5, PU1, TBET and TCF1 in 7 malignant NK-cell lines together with 5 malignant NKT-cell lines, 5 T-cell acute lymphoblastic leukemia (ALL) cell lines including 3 gamma/delta T-cell receptor (TCR) type and 2 alpha/beta TCR type, and 3 B-cell precursor (BCP) leukemia cell lines. AML1, E2A, ETS1, IKAROS and IRF1 were found to be positive for all cell lines tested whereas GATA1 turned out to be universally negative. CEBPA, PAX5 and PU1 were negative for all cell lines tested except in the three positive BCP-cell lines. GATA2 was pos...Continue Reading
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