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- W2088603337 abstract "We have investigated the functional characteristics of peripheral blood-derived CD34+ cells mobilized by a combination of chemotherapy and G-CSF (mobilized peripheral blood-derived [MPB] CD34+ cells). In this study, subpopulations of MPB CD34+ cells have been directly compared in clonal cultures, long-term cultures with bone marrow (BM) stromal cells, and single-cell cultures. MPB CD34+ cells could be subdivided by expression levels of HLA-DR (DR), CD38, CD33 and c-kit antigens. The majority of MPB CD34+ cells expressed DR and CD38 antigens. In contrast, approximately 60% and 20% of the MPB CD34+ cells expressed CD33 and c-kit antigens, respectively. Interestingly, MPB CD34+ cells can be subdivided into three fractions which express high, low or negative levels of c-kit receptor. All types of committed progenitors were observed in populations of CD34+DR+, CD34+DR-, CD34+CD33-, CD34+CD38+ and CD34+ c-kit(low) cells. Colony forming unit-granulocyte/macrophage was highly enriched in the population of CD34+CD33+ cells, whereas BFU-E was highly enriched in the population of CD34+ c-kit(high) cells. In the population of CD34+CD38- cells, however, a few myeloid progenitors were detected. In addition, limiting dilution analyses clearly showed that the long-term culture-initiating cell (LTC-IC) is enriched in the populations of CD34+DR-, CD34+CD33- and CD34+c-kit-(or low) cells, but very few in CD34+ c-kit(high) cells, and that CD38 antigen is not a useful marker for the enrichment of LTC-IC derived from MPB CD34+ cells. Moreover, single cell clone sorting experiments clearly demonstrated the functional differences between CD34+CD38+ and CD34+CD38- cells as well as CD34+ cells expressing different levels of c-kit receptor. Our results suggest that an immunophenotype of LTC-IC is different between BM-, cord blood- and MPB-derived CD34+ cells and that primitive and committed progenitors existing in these sources may be functionally different." @default.
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- W2088603337 date "1997-01-01" @default.
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- W2088603337 title "Functional Differences between Subpopulations of Mobilized Peripheral Blood‐Derived CD34+Cells Expressing Different Levels of HLA‐DR, CD33, CD38 and c‐kit Antigens" @default.
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- W2088603337 doi "https://doi.org/10.1002/stem.150073" @default.
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