Abstract:
BACKGROUND:Transplantation of mesenchymal stem cells (MSC) in rodent models has proved to be an effective therapeutic approach for spinal cord injury (SCI). However, further studies in primate models are still needed before clinical application of MSC to patients. METHODS:MSC were isolated from rhesus monkey BM and induced ex vivo to differentiate into neural lineage cells. Induced cells were labeled with Hoechst 33342 and injected into the injured sites of rhesus SCI models. Function of the injured spinal cord was assessed using Tarlov behavior assessment, sensory responses and electrophysiologic tests of cortical somatosensory-evoked potential (CSEP) and motor-evoked potential (MEP). In vivo differentiation of the implanted cells was demonstrated by the presence of neural cell markers in Hoechst 33342-labeled cells. The re-establishment of the axonal pathway was demonstrated using a true blue (TB) chloride retrograde tracing study. RESULTS:Monkeys achieved Tarlov grades 2-3 and nearly normal sensory responses 3 months after cell transplantation. Both CSEP and MEP showed recovery features. The presence of the neural cell markers neurofilament (NF), neuro-specific enolase (NSE) and glial fibrillary acidic protein (GFAP) was observed in approximately 10% of Hoechst 33342-labeled cells. TB, originally injected at the caudal side of injured sites, was traceable in the rostral thoracic spinal cord, red nucleus and sensory motor cortex. DISCUSSION:Our results suggest that the implantation of MSC-derived cells elicits de novo neurogenesis and functional recovery in a non-human primate SCI model and should harness the clinical application of BM MSC in SCI patients.
journal_name
Cytotherapyjournal_title
Cytotherapyauthors
Deng YB,Liu XG,Liu ZG,Liu XL,Liu Y,Zhou GQdoi
10.1080/14653240600760808subject
Has Abstractpub_date
2006-01-01 00:00:00pages
210-4issue
3eissn
1465-3249issn
1477-2566pii
H251L3244557417Kjournal_volume
8pub_type
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