Abstract
Neonatal hypoxic-ischemic brain injury (HIE) remains a major cause of neurologic disabilities. However, many experimental therapies have shown limited successes. We assessed whether human mesenchymal stem cells (MSCs) could be transplanted in the HIE rat brain to improve neurologic disabilities. P7 SD rats were either subjected to left carotid artery ligation and hypoxic exposure [hypoxia-ischemia (HI)] or sham operation and normoxic exposure (sham). On P10, rat pubs received either PKH26-labeled MSCs or buffer via intracardial injection, resulting in four experimental groups: sham-buffer, sham-MSC, HI-buffer, and HI-MSC. Cylinder test and accelerating rotarod test were performed 14, 20, 30, and 40 d after injection. Six weeks after injection, cresyl violet and double immunofluorescence staining were performed. MSCs were transplanted to the whole brain mainly after HI. Glial fibrillary acidic protein and OX42 were more abundantly colocalized with MSC than neuronal specific nuclear protein or myelin basic protein. There were no significant differences in the total amounts and cell types between the lesioned and nonlesioned hemisphere. The lesioned hemispheric volume was decreased after HI (p = 0.012) but not restored by MSC. Neurologic performance was significantly impaired only on the cylinder test after HI (p = 0.034), and MSC transplants improved it (p = 0.010). These suggest MSC can be a candidate for the treatment of neonatal HIE.
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Abbreviations
- DAPI:
-
4′,6′-diamidino-2-phenylindole dihydrochloride hydrate
- FACS:
-
fluorescence-activated cell sorting
- GFAP:
-
glial fibrillary acidic protein
- HI:
-
hypoxia-ischemia
- HIE:
-
hypoxic-ischemic brain injury
- MBP:
-
myelin basic protein
- MSC:
-
mesenchymal stem cell
- NeuN:
-
neuronal specific nuclear protein
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Supported by Seoul R&BD Program No. 10548. This study was also partially supported by KT&T Grant-in-Aid for neonatal research (SNUCH200601, SNUUCH200801).
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Lee, J., Kim, B., Jo, C. et al. Mesenchymal Stem-Cell Transplantation for Hypoxic-Ischemic Brain Injury in Neonatal Rat Model. Pediatr Res 67, 42–46 (2010). https://doi.org/10.1203/PDR.0b013e3181bf594b
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DOI: https://doi.org/10.1203/PDR.0b013e3181bf594b
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