Absence of hematopoiesis from transplanted olfactory bulb neural stem cells.
Neural stem cells giving rise to neurons and glia cells have been isolated from the embryonic and adult central nervous system. The extent to which they are able to differentiate into cells of non-neural lineages, such as the hematopoietic lineage, is nonetheless unclear. We previously reported the isolation of stem cells from the mouse olfactory bulb neuroepithelium. In the present study, we analysed whether olfactory bulb stem cells (OBSC) can generate cells with hematopoietic features. Cells were prepared from the olfactory bulbs of transgenic mice expressing enhanced green fluorescent protein (EGFP). In culture, transgenic cells proliferated with the same kinetics as wild-type cells. Following mitogen removal, both cell types gave rise to similar numbers of neurons, astrocytes and oligodendrocytes, indicating that EGFP overexpression does not alter OBSC proliferation and differentiation patterns. When these cells were injected into the tail vein of irradiated mice, no hematopoietic cells derived from the OBSC could be recovered in their peripheral blood, spleen or bone marrow. By contrast, when OBSC were transplanted into the adult brain, EGFP-positive cells were found in the striatum and corpus callosum; differentiated cells expressed antigenic markers of neurons and astrocytes. These results suggest that embryonic olfactory bulb stem cells are not endowed with the potential to produce hematopoiesis.
Group of Growth Factors in Vertebrate Development, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas (CSIC), Ramiro de Maeztu 9, E-28040 Madrid, Spain.
María J
MJ
Yusta-Boyo
Manuel A
MA
González
Nancy
N
Pavón
Ana B
AB
Martín
Ricardo
R
De La Fuente
Javier
J
García-Castro
Flora
F
De Pablo
Rosario
R
Moratalla
Antonio
A
Bernad
Carlos
C
Vicario-Abejón
D000818:Animals; D001253:Astrocytes / Q000378:metabolism / Q000637:transplantation; D001973:Bromodeoxyuridine / Q000378:metabolism; D002452:Cell Count; D002454:Cell Differentiation; D002478:Cells, Cultured; D003342:Corpus Striatum / Q000378:metabolism / Q000528:radiation effects / Q000637:transplantation; D005434:Flow Cytometry; D005720:Gamma Rays / Q000009:adverse effects; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D049452:Green Fluorescent Proteins; D006410:Hematopoiesis / Q000502:physiology*; D007150:Immunohistochemistry / Q000379:methods; D007381:Intermediate Filament Proteins / Q000378:metabolism; D008164:Luminescent Proteins / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D009419:Nerve Tissue Proteins; D064231:Nestin; D009474:Neurons / Q000502:physiology* / Q000637:transplantation; D009830:Olfactory Bulb / Q000166:cytology* / Q000196:embryology / Q000637:transplantation; D009836:Oligodendroglia / Q000378:metabolism / Q000637:transplantation; D033581:Stem Cell Transplantation / Q000379:methods; D013234:Stem Cells / Q000502:physiology*; D013997:Time Factors; D014404:Tubulin / Q000378:metabolism
D005904:Glial Fibrillary Acidic Protein; D007381:Intermediate Filament Proteins; D008164:Luminescent Proteins; D009419:Nerve Tissue Proteins; C577485:Nes protein, mouse; D064231:Nestin; D014404:Tubulin; C462941:beta3 tubulin, mouse; D049452:Green Fluorescent Proteins; D001973:Bromodeoxyuridine