The ex vivo Expansion of Cord Blood Hematopoietic Cells: 1. Cell Growth Behavior
脐血造血细胞的体外扩增：1.生长规律的研究

The population growth and metabolism of hematopoietic cells from cord blood were investigated without and with hematopoietic growth factors and the long-term growth kinetics of cells was studied. In static cultivation of hematopoietic cells, the population specific growth rate was 0.34 d, and the average double time 2 days. The greater part of glucose was consumed and 40 mmol/L lactate was formed during cell culture. For the long-term culture, the maximum output of CFU-GM appeared between the 2nd and 3rd weeks and that of BFU-E in the first week. With 50% medium exchange, the expansions of total cells, CFU-GM, and BFU-E came up to 14, 13, and 5 times, respectively.