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Optimal Route for Mesenchymal Stem Cells Transplantation after Severe Intraventricular Hemorrhage in Newborn Rats.

Ahn SY, Chang YS, Sung DK, Sung SI, Yoo HS, Im GH, Choi SJ, Park WS - PLoS ONE (2015)

Bottom Line: At P32, brain tissue samples were obtained for biochemical and histological analyses.Although more MSCs localized to the brain after IC than after IV delivery, both methods were equally effective in preventing PHH; attenuating impaired rotarod test; increasing the number of TUNEL-positive cells, inflammatory cytokines, and astrogliosis; and reducing corpus callosal thickness and myelin basic protein expression after severe IVH regardless of mannitol co-infusion.These findings suggest that the less invasive IV route might be a good alternative for clinically unstable, very preterm infants that cannot tolerate a more invasive IC delivery of MSCs.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

ABSTRACT
Recently, we showed that intracerebroventricular (IC) transplantation of human umbilical cord blood (UCB)-derived mesenchymal stem cells (MSCs) significantly attenuates posthemorrhagic hydrocephalus (PHH) and brain damage after severe IVH in newborn rats. This study was performed to determine the optimal route for transplanting MSCs for severe IVH by comparing IC transplantation, intravenous (IV) transplantation, and IV transplantation plus mannitol infusion. Severe IVH was induced by injecting 100 uL of blood into each ventricle of Sprague-Dawley rats on postnatal day 4 (P4). After confirming severe IVH with brain magnetic resonance imaging (MRI) at P5, human UCB-derived MSCs were transplanted at P6 by an IC route (1×105), an IV route (5×105), or an IV route with mannitol infused. Follow-up brain MRIs and rotarod tests were performed. At P32, brain tissue samples were obtained for biochemical and histological analyses. Although more MSCs localized to the brain after IC than after IV delivery, both methods were equally effective in preventing PHH; attenuating impaired rotarod test; increasing the number of TUNEL-positive cells, inflammatory cytokines, and astrogliosis; and reducing corpus callosal thickness and myelin basic protein expression after severe IVH regardless of mannitol co-infusion. Despite the superior delivery efficacy with IC than with the IV route, both IC and IV transplantation of MSCs had equal therapeutic efficacy in protecting against severe IVH. These findings suggest that the less invasive IV route might be a good alternative for clinically unstable, very preterm infants that cannot tolerate a more invasive IC delivery of MSCs.

No MeSH data available.


Related in: MedlinePlus

Cell death and reactive gliosis induced by severe IVH in newborn rats.A, Representative immunofluorescence photomicrographs of the periventricular area with staining for TUNEL (green) and glial fibrillary acidic protein (GFAP) (red), and DAPI (blue) (original magnification; x400, scale bars; 20 μm). Average number of TUNEL-positive cells (B) and average density of GFAP staining (C) in the periventricular area. Data are expressed as mean ± SEM. NC, normal control rats; IC, IVH control rats; IC+man, IVH control rats+mannitol; IMV, IVH with intravenous transplantation of human UCB-MSCs; IMV+man, IVH with intravenous transplantation of human UCB-MSCs+mannitol; IMC, IVH with intracerebroventricular transplantation of human UCB-MSCs. * P <0.05 vs. NC, # P <0.05 vs. IC, †P <0.05 vs. IC+man.
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pone.0132919.g003: Cell death and reactive gliosis induced by severe IVH in newborn rats.A, Representative immunofluorescence photomicrographs of the periventricular area with staining for TUNEL (green) and glial fibrillary acidic protein (GFAP) (red), and DAPI (blue) (original magnification; x400, scale bars; 20 μm). Average number of TUNEL-positive cells (B) and average density of GFAP staining (C) in the periventricular area. Data are expressed as mean ± SEM. NC, normal control rats; IC, IVH control rats; IC+man, IVH control rats+mannitol; IMV, IVH with intravenous transplantation of human UCB-MSCs; IMV+man, IVH with intravenous transplantation of human UCB-MSCs+mannitol; IMC, IVH with intracerebroventricular transplantation of human UCB-MSCs. * P <0.05 vs. NC, # P <0.05 vs. IC, †P <0.05 vs. IC+man.

Mentions: To determine the extent of periventricular brain injury after severe IVH, the number of TUNEL-positive cells and density of GFAP-positive cells were assessed by immunohistochemistry of periventricular brain tissue at P32. The number of TUNEL-positive cells and density of GFAP-positive cells in the IC group were significantly higher than in the NC group (Fig 3). The abnormalities observed in the IC group were significantly improved in the IMC, IMV, and IMV+man groups but not in the IC+man group. The extent of attenuation did not differ significantly among the IMC, IMV, and IMV+man groups, indicating that mannitol co-infusion did not augment the benefits of administering IV MSCs after severe IVH.


Optimal Route for Mesenchymal Stem Cells Transplantation after Severe Intraventricular Hemorrhage in Newborn Rats.

Ahn SY, Chang YS, Sung DK, Sung SI, Yoo HS, Im GH, Choi SJ, Park WS - PLoS ONE (2015)

Cell death and reactive gliosis induced by severe IVH in newborn rats.A, Representative immunofluorescence photomicrographs of the periventricular area with staining for TUNEL (green) and glial fibrillary acidic protein (GFAP) (red), and DAPI (blue) (original magnification; x400, scale bars; 20 μm). Average number of TUNEL-positive cells (B) and average density of GFAP staining (C) in the periventricular area. Data are expressed as mean ± SEM. NC, normal control rats; IC, IVH control rats; IC+man, IVH control rats+mannitol; IMV, IVH with intravenous transplantation of human UCB-MSCs; IMV+man, IVH with intravenous transplantation of human UCB-MSCs+mannitol; IMC, IVH with intracerebroventricular transplantation of human UCB-MSCs. * P <0.05 vs. NC, # P <0.05 vs. IC, †P <0.05 vs. IC+man.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4514759&req=5

pone.0132919.g003: Cell death and reactive gliosis induced by severe IVH in newborn rats.A, Representative immunofluorescence photomicrographs of the periventricular area with staining for TUNEL (green) and glial fibrillary acidic protein (GFAP) (red), and DAPI (blue) (original magnification; x400, scale bars; 20 μm). Average number of TUNEL-positive cells (B) and average density of GFAP staining (C) in the periventricular area. Data are expressed as mean ± SEM. NC, normal control rats; IC, IVH control rats; IC+man, IVH control rats+mannitol; IMV, IVH with intravenous transplantation of human UCB-MSCs; IMV+man, IVH with intravenous transplantation of human UCB-MSCs+mannitol; IMC, IVH with intracerebroventricular transplantation of human UCB-MSCs. * P <0.05 vs. NC, # P <0.05 vs. IC, †P <0.05 vs. IC+man.
Mentions: To determine the extent of periventricular brain injury after severe IVH, the number of TUNEL-positive cells and density of GFAP-positive cells were assessed by immunohistochemistry of periventricular brain tissue at P32. The number of TUNEL-positive cells and density of GFAP-positive cells in the IC group were significantly higher than in the NC group (Fig 3). The abnormalities observed in the IC group were significantly improved in the IMC, IMV, and IMV+man groups but not in the IC+man group. The extent of attenuation did not differ significantly among the IMC, IMV, and IMV+man groups, indicating that mannitol co-infusion did not augment the benefits of administering IV MSCs after severe IVH.

Bottom Line: At P32, brain tissue samples were obtained for biochemical and histological analyses.Although more MSCs localized to the brain after IC than after IV delivery, both methods were equally effective in preventing PHH; attenuating impaired rotarod test; increasing the number of TUNEL-positive cells, inflammatory cytokines, and astrogliosis; and reducing corpus callosal thickness and myelin basic protein expression after severe IVH regardless of mannitol co-infusion.These findings suggest that the less invasive IV route might be a good alternative for clinically unstable, very preterm infants that cannot tolerate a more invasive IC delivery of MSCs.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

ABSTRACT
Recently, we showed that intracerebroventricular (IC) transplantation of human umbilical cord blood (UCB)-derived mesenchymal stem cells (MSCs) significantly attenuates posthemorrhagic hydrocephalus (PHH) and brain damage after severe IVH in newborn rats. This study was performed to determine the optimal route for transplanting MSCs for severe IVH by comparing IC transplantation, intravenous (IV) transplantation, and IV transplantation plus mannitol infusion. Severe IVH was induced by injecting 100 uL of blood into each ventricle of Sprague-Dawley rats on postnatal day 4 (P4). After confirming severe IVH with brain magnetic resonance imaging (MRI) at P5, human UCB-derived MSCs were transplanted at P6 by an IC route (1×105), an IV route (5×105), or an IV route with mannitol infused. Follow-up brain MRIs and rotarod tests were performed. At P32, brain tissue samples were obtained for biochemical and histological analyses. Although more MSCs localized to the brain after IC than after IV delivery, both methods were equally effective in preventing PHH; attenuating impaired rotarod test; increasing the number of TUNEL-positive cells, inflammatory cytokines, and astrogliosis; and reducing corpus callosal thickness and myelin basic protein expression after severe IVH regardless of mannitol co-infusion. Despite the superior delivery efficacy with IC than with the IV route, both IC and IV transplantation of MSCs had equal therapeutic efficacy in protecting against severe IVH. These findings suggest that the less invasive IV route might be a good alternative for clinically unstable, very preterm infants that cannot tolerate a more invasive IC delivery of MSCs.

No MeSH data available.


Related in: MedlinePlus