Superparamagnetic iron oxide labeling and transplantation of adipose-derived stem cells in middle cerebral artery occlusion-injured mice.

Published

Journal Article

OBJECTIVE: Adipose-derived stem cells are an alternative stem cell source for CNS therapies. The goals of the current study were to label adipose-derived stem cells with superparamagnetic iron oxide (SPIO) particles, to use MRI to guide the transplantation of adipose-derived stem cells in middle cerebral artery occlusion (MCAO)-injured mice, and to localize donor adipose-derived stem cells in the injured brain using MRI. We hypothesized that we would successfully label adipose-derived stem cells and image them with MRI. MATERIALS AND METHODS: Adipose-derived stem cells harvested from mice inbred for green fluorescent protein were labeled with SPIO ferumoxide particles through the use of poly-L-lysine. Adipose-derived stem cell viability, iron staining, and proliferation were measured after SPIO labeling, and the sensitivity of MRI in the detection of SPIO-labeled adipose-derived stem cells was assessed ex vivo. Adult mice (n = 12) were subjected to unilateral MCAO. Two weeks later, in vivo 7-T MRI was performed to guide stereotactic transplantation of SPIO-labeled adipose-derived stem cells into brain tissue adjacent to the infarct. After 24 hours, the mice were sacrificed for high-resolution ex vivo 7-T or 9.4-T MRI and histologic study. RESULTS: Adipose-derived stem cells were efficiently labeled with SPIO particles without loss of cell viability or proliferation. Using MRI, we guided precise transplantation of adipose-derived stem cells. MR images of mice given injections of SPIO-labeled adipose-derived stem cells had hypointense regions that correlated with the histologic findings in donor cells. CONCLUSION: MRI proved useful in transplantation of adipose-derived stem cells in vivo. This imaging technique may be useful for studies of CNS stem cell therapies.

Full Text

Duke Authors

Cited Authors

  • Rice, HE; Hsu, EW; Sheng, H; Evenson, DA; Freemerman, AJ; Safford, KM; Provenzale, JM; Warner, DS; Johnson, GA

Published Date

  • April 2007

Published In

Volume / Issue

  • 188 / 4

Start / End Page

  • 1101 - 1108

PubMed ID

  • 17377054

Pubmed Central ID

  • 17377054

Electronic International Standard Serial Number (EISSN)

  • 1546-3141

Digital Object Identifier (DOI)

  • 10.2214/AJR.06.0663

Language

  • eng

Conference Location

  • United States