TY - JOUR
T1 - Dual-modality in vivo monitoring of subventricular zone stem cell migration and metabolism
AU - Cicchetti, Francesca
AU - Gross, Robert E.
AU - Bulte, Jeff W.M.
AU - Owen, Mary
AU - Chen, Iris
AU - Saint-Pierre, Martine
AU - Wang, Xukui
AU - Yu, Meixiang
AU - Brownell, Anna Liisa
PY - 2007/5
Y1 - 2007/5
N2 - Rat subventricular zone (SVZ) stem cells were labeled with superparamagnetic iron oxide particles (SPIO) to follow their fate and migratory potential with magnetic resonance imaging (MRI) and positron emission tomography (PET). Labeled cells were transplanted into either the right rostral migratory stream (RMS) or striatum of normal adult Sprague-Dawley rats and serially followed for 3 months. Minimal migration of the cells implanted into the striatum was observed after 3 weeks whereas SVZ cells implanted into the RMS migrated toward the olfactory bulb at 1 week post-transplantation. PET studies of glucose metabolism using 18F-FDG demonstrated enhanced glucose utilization in the striatum of transplanted animals. PET studies conducted 3 months after transplantation showed elevated accumulation of 11C-raclopride (dopamine receptor type 2) and 11C-CFT (dopamine transporter) binding in the striatal grafts. Implanted SVZ cells did not induce significant inflammation as identified by PET using 11C-PK11195, a ligand detecting activated microglia. Histological analysis identified viable SPIO-labeled cells (some of which were nestin-positive) 7 weeks post-transplantation, suggesting a prolonged presence of undifferentiated neural stem cells within transplants. In addition, double immunostaining for neuronal and astrocytic markers (NeuN and GFAP) indicated that differentiation into neuronal and astrocytic phenotypes also occurred. Thus, combining MRI and PET enables monitoring of cell migration and metabolism non-invasively in vivo for extended periods of time.
AB - Rat subventricular zone (SVZ) stem cells were labeled with superparamagnetic iron oxide particles (SPIO) to follow their fate and migratory potential with magnetic resonance imaging (MRI) and positron emission tomography (PET). Labeled cells were transplanted into either the right rostral migratory stream (RMS) or striatum of normal adult Sprague-Dawley rats and serially followed for 3 months. Minimal migration of the cells implanted into the striatum was observed after 3 weeks whereas SVZ cells implanted into the RMS migrated toward the olfactory bulb at 1 week post-transplantation. PET studies of glucose metabolism using 18F-FDG demonstrated enhanced glucose utilization in the striatum of transplanted animals. PET studies conducted 3 months after transplantation showed elevated accumulation of 11C-raclopride (dopamine receptor type 2) and 11C-CFT (dopamine transporter) binding in the striatal grafts. Implanted SVZ cells did not induce significant inflammation as identified by PET using 11C-PK11195, a ligand detecting activated microglia. Histological analysis identified viable SPIO-labeled cells (some of which were nestin-positive) 7 weeks post-transplantation, suggesting a prolonged presence of undifferentiated neural stem cells within transplants. In addition, double immunostaining for neuronal and astrocytic markers (NeuN and GFAP) indicated that differentiation into neuronal and astrocytic phenotypes also occurred. Thus, combining MRI and PET enables monitoring of cell migration and metabolism non-invasively in vivo for extended periods of time.
KW - Dopamine
KW - Inflammation
KW - Magnetic resonance imaging (MRI)
KW - Positron emission tomography (PET)
KW - Superparamagnetic iron oxide particles
KW - Transplantation
UR - http://www.scopus.com/inward/record.url?scp=34547517468&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547517468&partnerID=8YFLogxK
U2 - 10.1002/cmmi.138
DO - 10.1002/cmmi.138
M3 - Article
C2 - 17583908
AN - SCOPUS:34547517468
SN - 1555-4309
VL - 2
SP - 130
EP - 138
JO - Contrast Media and Molecular Imaging
JF - Contrast Media and Molecular Imaging
IS - 3
ER -