Shifting foci of hematopoiesis during reconstitution from single stem cells.
To reveal the early events and dynamics of hematopoietic reconstitution in living animals in real-time, we used bioluminescence imaging to monitor engraftment from single luciferase-labeled hematopoietic stem cells (HSC) in irradiated recipients. Transplanted HSC generated discrete foci in the spleen and bone marrow (BM), at a frequency that correlated with BM compartment size. Initially detected foci could expand locally, seed other sites in BM or spleen, and/or recede with different kinetics. These studies reveal dynamic and variable patterns of engraftment from highly purified HSC and indicate that the final overall contribution of individual HSC to hematopoietic chimerism does not depend on the specific site of initial engraftment and expansion.
Cao
Yu-An
YA
Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA.
Wagers
Amy J
AJ
Beilhack
Andreas
A
Dusich
Joan
J
Bachmann
Michael H
MH
Negrin
Robert S
RS
Weissman
Irving L
IL
Contag
Christopher H
CH
D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology; D002678:Chimera; D006085:Graft Survival; D049452:Green Fluorescent Proteins; D006410:Hematopoiesis; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology; D008156:Luciferases / Q000235:genetics; D008163:Luminescent Measurements; D008164:Luminescent Proteins / Q000235:genetics; D051379:Mice; D008822:Mice, Transgenic; D011994:Recombinant Proteins / Q000235:genetics
D008164:Luminescent Proteins; D011994:Recombinant Proteins; D049452:Green Fluorescent Proteins; D008156:Luciferases