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HLA class I antigen cell surface expression is preserved on acute myeloid leukemia blasts at diagnosis and at relapse.

Abstract：

:Human leukocyte antigens (HLA) class I molecules restrict the interaction between cytotoxic T cells and target cells. Abnormalities in HLA class I antigen expression and/or function may provide tumor cells with a mechanism for escaping immune surveillance and resisting T cell-based immunotherapies. The potential for applying T cell-based immunotherapy in the treatment of acute myeloid leukemia (AML) has stimulated interest in analyzing HLA class I antigen expression on leukemic blasts in this disease. Little information is available in the literature. We have analyzed HLA class I antigen expression on bone marrow samples from 25 newly diagnosed AML patients by indirect immunofluorescence staining with monoclonal antibodies. Five of these patients were also studied at relapse. Leukemic blasts were resolved from normal lymphocytes by staining with antiCD45 antibody; CD45 expression is dim on leukemia cells, but bright on lymphocytes. HLA class I antigen expression was higher on leukemic blasts than on autologous lymphocytes in all but one case. Moreover, there was no significant change in HLA class I antigen expression at relapse. These results suggest that abnormalities in HLA class I antigens are infrequent in AML and should not represent a major obstacle to the application of T cell-based immunotherapies in this disease.

journal_name

Leukemia

journal_title

Leukemia

authors

Wetzler M,Baer MR,Stewart SJ,Donohue K,Ford L,Stewart CC,Repasky EA,Ferrone S

doi

10.1038/sj.leu.2401982

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

128-33

issue

1

eissn

0887-6924

issn

1476-5551

journal_volume

15

pub_type

杂志文章

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