Myeloperoxidase gene expression in blast cells with a lymphoid phenotype in cases of acute lymphoblastic leukemia.

Abstract:

:By using a cDNA clone of the myeloperoxidase (MPO) gene, we have studied, by Northern blot analysis, the level of MPO mRNA in eight cases of acute lymphoblastic leukemia (ALL). The blast cell populations studied were characterized by morphologic, cytochemical, immunochemical, and molecular criteria. With all the methods used the populations were found to be highly homogeneous and showed a typical lymphoid phenotype. In particular, the Ig heavy-chain gene rearrangement was largely prevalent, and the germ line configuration was almost absent. However, in three of eight cases, high levels of MPO mRNA were detected. The remarkable homogeneity of the cell populations examined suggests that the MPO mRNA observed was present in cellular elements certainly identified as lymphoid. The absence of contamination by myeloid cells was confirmed by the results of Western blot analysis of the proteins of the cell population studied: no MPO protein was detectable. The levels of mRNA observed were high enough to be comparable to those observed in a promyelocytic cell population.

journal_name

Blood

journal_title

Blood

authors

Ferrari S,Mariano MT,Tagliafico E,Sarti M,Ceccherelli G,Selleri L,Merli F,Narni F,Donelli A,Torelli G

subject

Has Abstract,Author List Incomplete

pub_date

1988-09-01 00:00:00

pages

873-6

issue

3

eissn

0006-4971

issn

1528-0020

journal_volume

72

pub_type

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