A novel cell line derived from de novo acute myeloblastic leukaemia with trilineage myelodysplasia which proliferates in response to a Notch ligand, Delta-1 protein.

Abstract:

:A novel human leukaemia cell line, designated TMD7, was established from blast cells of a patient with de novo acute myeloblastic leukaemia with trilineage myelodysplasia (AML/TLD). As seen in the original blast cells, TMD7 cells expressed CD7, CD13, CD33 and CD34 and showed an abnormal karyotype containing -5, -7, -8, der(16)t(10;16)(q22;q13). The cells proliferated without added growth factors. Growth was stimulated with the addition of granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage CSF (GM-CSF) and interleukin 3. Differentiation was not observed with the addition of various cytokines. As a cell line derived from AML/TLD has not been reported, TMD7 will be a useful tool as a model of AML/TLD cells. Recently, it was reported that the Notch system has crucial roles to regulate the self-renewal and differentiation of haematopoietic stem cells. We found that TMD7 cells expressed Notch-1 and Notch-2 mRNA. The exposure to recombinant Delta-1 protein, which was one of the Notch ligands, significantly stimulated the growth of TMD7 cells. This is the first human cell line which was shown to proliferate in response to Delta-1, without artificially expressed Notch protein. Therefore, TMD7 will also be a useful tool to study the mechanism of the Notch-Notch ligand interaction.

journal_name

Br J Haematol

authors

Tohda S,Sakano S,Ohsawa M,Murakami N,Nara N

doi

10.1046/j.1365-2141.2002.03446.x

subject

Has Abstract

pub_date

2002-05-01 00:00:00

pages

373-8

issue

2

eissn

0007-1048

issn

1365-2141

pii

3446

journal_volume

117

pub_type

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