Abstract:
:Recent data suggest that myeloid neoplasms are organized hierarchically in terms of self-renewal and maturation of early progenitor cells, similar to normal myelopoiesis. In acute myeloid leukemia (AML), the NOD/SCID mouse-repopulating leukemic stem cells usually co-express CD123 with CD34, but lack CD38. So far, however, little is known about expression of other markers and targets on these progenitors. In the present study, expression of target antigens on CD34+/CD38- cells was analysed by multi-color flow cytometry in patients with AML (n = 18), myelodysplastic syndromes (MDS, n = 6), chronic myeloid leukemia (CML, n = 8) and systemic mastocytosis (SM, n = 9). The IL-3Ralpha chain (CD123) was found to be expressed on CD34+/CD38- cells in a majority of the patients in all disease categories. Independent of the type of disease, the vast majority of these stem cells co-expressed aminopeptidase-N (CD13) and CD44 in all patients. By contrast, the CD34+/CD38- progenitor cells expressed variable amounts of the target receptor CD33, c-kit (CD117) and AC133 (CD133). In conclusion, neoplastic stem cells in various myeloid neoplasms appear to express a similar phenotype including target antigens such as CD13, CD33 and CD44. Since many of these targets are not expressed on all stem cells in all patients, the elimination of the entire clone may require combinations of targeted antibodies or use of additional drugs.
journal_name
Leuk Lymphomajournal_title
Leukemia & lymphomaauthors
Florian S,Sonneck K,Hauswirth AW,Krauth MT,Schernthaner GH,Sperr WR,Valent Pdoi
10.1080/10428190500272507keywords:
subject
Has Abstractpub_date
2006-02-01 00:00:00pages
207-22issue
2eissn
1042-8194issn
1029-2403pii
G0W721H1N35Q7453journal_volume
47pub_type
杂志文章abstract::The pattern of disease relapse in nine patients with multiple myeloma who had received double hemi body irradiation therapy is analysed. This analysis highlights the localisation of these relapses to skeletal areas excluded from initial radiation fields. This phenomenon was also documented in a patient who received sy...
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journal_title:Leukemia & lymphoma
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