Media type: E-Article Title: C‐Kit receptor (CD117) expression on myeloblasts and white blood cell counts in acute myeloid leukemia Contributor: Woźniak, Jolanta; Kopeć‐Szlęzak, Joanna Published: Wiley, 2004 Published in: Cytometry Part B: Clinical Cytometry, 58B (2004) 1, Seite 9-16 Language: English DOI: 10.1002/cyto.b.10068 ISSN: 1552-4957; 1552-4949 Origination: Footnote: Description: AbstractBackgroundThe c‐Kit receptor is considered to play a crucial role in hematopoiesis. Induction of mobilization of hematopoietic cells in the bone marrow requires cooperative signaling through c‐Kit and c‐Kit ligand pathway, and these interactions are important in the retention of stem cells within the bone marrow. Therefore, we analyzed c‐Kit density on the leukemic myeloblasts of patients with acute myeloid leukemia (AML) in relation to white blood cell count (WBC) in the peripheral blood.MethodsBone marrow aspirates collected from patients with AML and bone marrow aspirates and leukapheresis products after granulocyte colony‐stimulating factor blood mobilization from adult volunteers were studied. To determine the level of c‐Kit receptor expression, we applied quantitative (relative fluorescence intensity and antibody binding per cell) cytometric methods.ResultsOur data showed negative correlation between the level of c‐Kit expression intensity on myeloblasts and the number of leukocytes in blood of AML patients. The c‐Kit receptor density on myeloblasts in patients with low WBC was significantly stronger than that on myeloblasts in patients with high WBC. In the latter patient group, the density c‐Kit receptor on myeloblasts was similar to that on CD34+ cells in mobilized peripheral blood.ConclusionsThe obtained data suggest an involvement of c‐Kit receptor in the regulation of leukemic myeloblasts egress to the peripheral blood. © 2004 Wiley‐Liss, Inc. Access State: Open Access