Neural stem cells induced by neotype three-dimensional polypeptide-based self-assembled hydrogel / 生物医学工程学杂志
Journal of Biomedical Engineering
; (6): 612-616, 2010.
Article
de Zh
| WPRIM
| ID: wpr-230819
Bibliothèque responsable:
WPRO
ABSTRACT
The amphiphilic polypeptide (PA) was self-assembled into three-dimensional (3-D) porous complex of hydrogel and cells with the addition of NSCs-containing DMEM/F12. Cell differentiation in the surface and that within hydrogel were described. Cells harvested from the cerebral cortex of neonatal mice were triturated and cultivated in serum-free media. 1wt% PA was added into same volume of DMEM/F12 with cell concentration of 1 x 10(5)/ml and self-supported into 3-D hydrogel-cell composition; cells suspended within hydrogel being maintained (Experiment group, EG). lwt% PA was self-assembled into two-dimensional (2-D) hydrogel films triggered by addition of DMEM/F12, and then 1 x 10(5)/ml NSCs was seeded in the surface of films (Control group, CG). Cells in EG and CG were incubated in serum-free media for two weeks and stained with immunocytochemistry methods. TEM showed that the hydrogel derived from PA was composed of network nanofibers with their diameter ranging from 3 to 5 nm and length ranging from 100 nm to 1. 5 microm. Above 50% of cells obtained were Nestin positive cells. LSCM observations demonstrated that above 90% of cells survived two days after incubation within hydrogel, and were differentiated into NF and GFAP positive cells one week after incubation, their differentiation rates were 50% +/- 4.2% and 20% +/- 2.8% respectively; however, cells in CG were also differentiated into NF and GFAP positive cells, their differentiation rates were only 40% +/- 3.4% and 31% +/- 2.3% separately. Peptide-based hydrogel was able to provide 3-D environments for cell survival and induce primarily the differentiation of NSCs into neurons. Our data indicated that peptide-directed self-assembly of hydrogels was useful and it served as the neotype nerve tissue engineering scaffolds.
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Peptides
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Différenciation cellulaire
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Cellules cultivées
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Chimie
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Rat Sprague-Dawley
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Techniques de culture cellulaire
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33783
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Biologie cellulaire
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Structures d'échafaudage tissulaires
/
Neurogenèse
Limites du sujet:
Animals
langue:
Zh
Texte intégral:
Journal of Biomedical Engineering
Année:
2010
Type:
Article