title: Kinetics of early and late spleen colony development.
abstract: The kinetics of spleen colony development were studied with special emphasis upon the self-replicative capacity of CFU-S, which are responsible for the early- or late-appearing spleen colonies, and upon CFU-S migration in the days following transplantation. It was found that, while the spleen colonies had a much lower daughter CFU-S content at eight days than at 11 or 12 days, many of the 8-day colonies remained in the spleen to become 12-day colonies which had many daughter CFU-S. In addition, it was found that large numbers of CFU-S were present in the splenic space between the colonies. Evidence was developed that these "intercolonial space" CFU-S were the founders of many of the late-appearing spleen colonies and that many or all of them were transported from the bone marrow to the spleen via the blood at varying times after the transplantation. Approximately one-half of the day-12 colony founders were found to arrive in the spleen after the third posttransplantation day.
authors.forename: N S
authors.initials: NS
authors.lastname: Wolf
authors.forename: G V
authors.initials: GV
authors.lastname: Priestley
mesh_terms: D000375:Aging; D000818:Animals; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation; D002478:Cells, Cultured; D002999:Clone Cells; D003433:Crosses, Genetic; D005260:Female; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D007621:Karyotyping; D007700:Kinetics; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008815:Mice, Inbred Strains; D013154:Spleen / Q000166:cytology* / Q000528:radiation effects