Abstract
Hemopoietic activity of stem hemopoietic cells from the liver of embryos was studied at different terms of intrauterine development. The fate of individual clones of hemopoietic cells marked by human adenosine deaminase gene was followed up in sublethally irradiated or newborn recipients. The efficiency of marker gene incorporation in primitive stem hemopoietic cells from the liver of 12-, 13-, and 17-day embryos was not high. Gene transfer was performed without cell prestimulation to division, and hence, these data show that primitive stem cells proliferate even in 17-day embryos. Cells from embryonal liver in all terms maintain hemopoiesis both in newborn and adult microenvironment, hemopoiesis being realized according to the clonal succession model, i. e. in the some way after transplantation of the bone marrow from adult mice.
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