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Fig. 3. Proliferation potential of BMSSC clones. A total of 35 CFU-F colonies
derived from STRO-1BRIGHT/VCAM-1+ single sorted cells
from two BM samples were analysed for their cumulative production of cells. A
marked variation in proliferative capacity between individual BMSSCs is
evident. The majority of clones (29/35, 83%) exhibited only moderate growth
potential, which did not persist beyond 20 population doublings. 6/35 clones
(17%) demonstrated continued growth extending beyond 20 population
doublings.