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1.  Focal Transplantation-based Astrocyte Replacement is Neuroprotective in a Model of Motor Neuron Disease 
Nature neuroscience  2008;11(11):1294-1301.
Cellular abnormalities in amyotrophic lateral sclerosis (ALS) are not limited to motor neurons. Astrocyte dysfunction occurs in human ALS and SOD1G93A animal models. Therefore, the value of focal enrichment of normal astrocytes was investigated using transplantation of lineage-restricted astrocyte precursors, Glial-Restricted Precursors (GRPs). GRPs were transplanted around cervical spinal cord respiratory motor neuron pools, the principal cells responsible for death in this neurodegenerative disease. GRPs survived in diseased tissue, differentiated efficiently into astrocytes, and reduced microgliosis in SOD1G93A rat cervical spinal cord. GRPs extended survival and disease duration, attenuated motor neuron loss, and slowed declines in fore-limb motor and respiratory physiological function. Neuroprotection was mediated in part by the primary astrocyte glutamate transporter, GLT1. These findings demonstrate the feasibility and efficacy of transplantation-based astrocyte replacement, and show that targeted multi-segmental cell delivery to cervical spinal cord is a promising therapeutic strategy for slowing focal motor neuron loss associated with ALS.
doi:10.1038/nn.2210
PMCID: PMC2656686  PMID: 18931666
stem cell; grafting; transplantation; motor neuron; neurodegeneration; replacement; neuroprotection; non-cell autonomous; astroglia; astrocyte; neural precursor cell; progenitor; lineage-restricted precursor; glial precursor; ALS; amyotrophic lateral sclerosis; SOD1

Results 1-1 (1)