EXTENSIVE PROLIFERATIVE CAPACITY OF SINGLE ISOLATED CD34(+++) HUMAN CORD-BLOOD CELLS IN SUSPENSION-CULTURE

被引:0
作者
XIAO, M
BROXMEYER, HE
HORIE, M
GRIGSBY, S
LU, L
机构
[1] INDIANA UNIV,SCH MED,WALTHER ONCOL CTR,INDIANAPOLIS,IN 46202
[2] INDIANA UNIV,SCH MED,DEPT MED HEMATOL ONCOL,INDIANAPOLIS,IN 46202
[3] INDIANA UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,INDIANAPOLIS,IN 46202
来源
BLOOD CELLS | 1994年 / 20卷 / 2-3期
关键词
CORD BLOOD; CD34(+++) CELLS; HEMATOPOIETIC PROGENITOR CELLS; MYELOID PROGENITOR CELLS;
D O I
暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Nonadherent, low-density T-lymphocyte-depleted (NALT(-)) CD34(+++) cells from normal human cord blood were assessed in suspension culture for the effects of recombinant cytokines on their proliferation, differentiation, and generation of myeloid progenitor cells. In this cell population, 82% of cells expressed c-kit protein as assessed by in situ hybridization, and their cloning efficiency was 85% when cells were plated at low cell numbers with combinations of growth factors. CD34(+++) cells were sorted as 1, 5, or 10 cell(s) per well and also at 5000 cells per dish to initiate stromal-free suspension cultures in the presence of steel factor (SLF), interleukin (IL)-1(alpha), and 1L-3. Forty-eight percent of the wells started with a single CD34(+++) cell were positive for growth after 14 days, and the wells contained greater than 5 x 10(3) cells by 21-28 days. Progenitors were assayed weekly with cultures initiated with 1 or 5000 cells. While the fold expansion of nucleated cells was greater in cultures initiated with one cell per well (>5000 compared to 791-fold expansion for 5000 cells), the fold expansion of progenitors was greater than 5000 cells were used to initiate cultures. Under optimal conditions, there was, respectively, a 160-, 164-, and 57-fold output of high proliferative potential colony-forming cells, granulocyte-macrophage colony-forming units, and erythroid burst-forming units/granulocyte erythroid macrophage megakaryocyte colony-forming units within 1-3 weeks for cultures initiated with 5000 CD34(+++) cells compared with respective fold increases of 29, 16, and 1, for single-initiated cultures. These results demonstrate the expansion capacity of single CD34(+++) cord blood cells and demonstrate that factors in addition to SLF, IL-1(alpha), and IL-3 are necessary for optimal expansion of progenitors from single isolated CD34(+++) cells.
引用
收藏
页码:455 / 467
页数:13
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