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  Česky / Czech version Čas. Lék. čes., 142, 2003, No. 7, pp. 410 -416.
 
Phenotype and Kinetics Analysis of the CD34+ Cell Subpopulations and Lymphocytes of Donors of the Peripheral Haematopoietic Stem Cells for the Allogeneic Transplantation 
Klabusay M., Suková V., Kořístek Z., Mayer J., Vorlíček J. 

Interní hematoonkologická klinika FN, Brno
 


Summary:

       Background. Amount of CD34+ cells is a critical parameter for quality assessment and successful engraftment of peripheral blood hematopoietic stem cells (PBSC) during the transplantation of haemopoisis. CD34+ cells are routinely analysed by immunophenotyping in PBSC and in peripheral blood during mobilization. Other leukocyte subpopulations are not usually assessed. Methods and Results. The authors present results of immunophenotyping of subpopulations of CD34+ cells and leucocytes in samples from donors of PBSC for allogeneic transplantations, who were stimulated with the growth factor G-CSF at dose 16 µg/kg/day. The amount of CD34+ cells was not significantly different between days 4 and 5; however, there was a significant drop at day 6. CD34+90+ and CD34+61+ subpopulations reached their maximum at the day 4; partially differentiated CD34+ cells with co-expression of CD33, CD19, and CD7 reached maximum at the day 6. CD4+ Th-lymphocytes were concentrated in the grafts during leukapheresis, CD4/CD8 ratio in the grafts was increased to average 3.06. Conclusions. The knowledge of kinetics of CD34+ subpopulations, together with stem cell selection and ex vivo manipulation, may have an impact on the speed of engraftment or GvHD prevention in transplanted patients.

        Key words: haematopoietic stem cells, immunophenotyping, CD34+ subpopulation, transplantat ion of haemopoisis.
       

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