Abstract |
We analyzed the expression of the Thy-1 antigen (CD90) in CD34+ acute leukemia using two-color flow cytometry. Leukemic cells were obtained from the bone marrow (BM) and/or the peripheral blood (PB) of 57 patients: 37 with acute myelogenous leukemia (AML) including nine with secondary AML following myelodysplastic syndrome (MDS/AML), and 20 with acute lymphoblastic leukemia (ALL) including three with chronic myelogenous leukemia in blast crisis (CML-BC) of the lymphoid type. Among these patients, one (3.6%) with de novo AML, two (22.2%) with MDS/AML, three (17.6%) with de novo ALL, and two (66.7%) with CML-BC coexpressed CD34 and Thy-1 (CD34+ Thy-1+) on more than 20% of the mononuclear cells within 'lymph' plus 'blast' window. Thy-1 was rarely expressed in de novo acute leukemia especially in AML. Interestingly, in 1 patient with CML-BC, the leukemic cells in BM were divided into two subpopulations (CD34+ Thy-1low and CD34+ Thy-1high), whereas most of the CD34+ leukemic cells in PB were Thy-1high. However, the mechanism for the mobilization of CD34+ Thy-1high leukemic cells into the PB is unknown.
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Authors | T Inaba, C Shimazaki, T Sumikuma, R Takahashi, H Hirai, T Kikuta, Y Sudo, N Yamagata, E Ashihara, H Goto, N Fujita, M Yoshimura, M Nakagawa |
Journal | International journal of hematology
(Int J Hematol)
Vol. 66
Issue 3
Pg. 315-23
(Oct 1997)
ISSN: 0925-5710 [Print] Japan |
PMID | 9401277
(Publication Type: Journal Article)
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Chemical References |
- Antigens, CD34
- Thy-1 Antigens
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Topics |
- Acute Disease
- Antigens, CD34
(blood)
- Flow Cytometry
- Humans
- Leukemia
(immunology)
- Thy-1 Antigens
(analysis)
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