title: Comparative studies on the characteristics of proliferation and differentiation of spleen colony-forming cells.
abstract: Using a single spleen colony transplantation technique and sex chromosome typing as a natural cytogenetic marker, most spleen colony-forming cells (CFC) in adult bone marrow or fetal livers of inbred LACA or C57 mice re-established hemopoiesis in lethally irradiated mice when the spleen colonies were sampled at 13 days after transplantation. However, most of the spleen colony-forming cells in the peripheral blood of normal mice possess little potential for proliferation and are less efficient in the re-establishment of hemopoiesis in lethally irradiated mice. The CFC population is heterogeneous in the mice. From the subsequent retransplantation of colonies from colony-forming cells in the peripheral blood, the simple assessment of spleen colony-forming units (CFU-s) content, based on the number of splenic colonies, does not reliably represent the content of hemopoietic stem cells.
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D008099:Liver / Q000166:cytology / Q000196:embryology; D051379:Mice; D008815:Mice, Inbred Strains; D011828:Radiation Chimera; D013154:Spleen / Q000166:cytology*