Individual differences in a functional organization of the hematopoietic tissue.
Random-bred ICR mice exhibited a wide range of spleen colony-forming units (CFU-S) and granulocyte-macrophage colony-forming cells (GM- CFC) between individuals. Both CFU-S and GM- CFC values were, however, relatively stable in individual mice over a period of 6 weeks, although the cellularity of the marrows changed significantly during the same period. CFU-S and GM- CFC values were only weakly correlated in individual mice. Bone marrows of mice with low CFU-S values did not have a lower cellularity than mice with high CFU-S values. A low level of CFU-S thus appeared to be compensated for by a higher clonal expansion of maturing cells. It may be concluded that there is wide variation in the organization of the stem cell compartment. Individuals may thus differ markedly in the organization of the marrow. Such differences may prevail in man and be of functional importance at times of extra demands, e.g., during cytostatic therapy.[1]References
- Individual differences in a functional organization of the hematopoietic tissue. Necas, E., Znojil, V., Sefc, L., Jirásková, Z. Exp. Hematol. (1989) [Pubmed]
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