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Characterization of acute myeloid leukemia (AML) coexpressing lymphoid markers: different biologic features between T-cell antigen positive and B-cell antigen positive AML.

Abstract：

:The clinical and biologic characteristics of acute myeloid leukemia (AML) with coexpression of lymphoid-associated antigens (Lym+ AML) were studied from 39 cases who represented 24% of 161 newly diagnosed de novo AML. Twenty-seven cases (16.8%) were positive for the expression of T-cell markers (T+ AML) and 12 (7.5%) for B-cell markers (B+ AML). Chromosomal abnormalities t(9;22)(q34;q11) and t/del(11)(q23), which were considered to be associated with acute leukemia coexpressing markers of more than one cell lineage, were detected in five and in four patients, respectively. There was no prognostic significance of B-cell or T-cell antigen expression in AML. Of 12 T+ AML cases in which cells were available for gene analysis, all showed germline configuration of immunoglobulin heavy chain and T-cell receptor beta chain genes, while seven of nine B+ AML showed rearrangements of either or both of the genes. Double labeling of the cells with myeloperoxidase and lymphoid markers demonstrated that individual blasts in all the five T+ AML tested were simultaneously expressing myeloperoxidase activity and CD7; however, most blasts in the three B+ AML studied expressed either myeloperoxidase activity or CD10, but not both. In eight of the nine T+ AML tested, the T-cell antigen-positive leukemic blasts were significantly decreased to less than 10%, after in vitro culture with the differentiation-inducing agent phorbol ester. B-cell markers remained positive (> or = 20%) on the cells in the two B+ AML who had the same study. These findings suggested that T+ AML and B+ AML might have different biologic features. Further studies on more patients are needed to clarify this point.

journal_name

Leukemia

journal_title

Leukemia

authors

Tien HF,Wang CH,Chen YC,Shen MC,Lin DT,Lin KH

subject

Has Abstract

pub_date

1993-05-01 00:00:00

pages

688-95

issue

5

eissn

0887-6924

issn

1476-5551

journal_volume

7

pub_type

杂志文章

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