Fibroblast growth factor-2 increases the expression of neurogenic genes and promotes the migration and differentiation of neurons derived from transplanted neural stem/progenitor cells.

Abstract:

:The capacity of neural stem cells (NSC) to generate different types of neurons and glia depends on the action of intrinsic determinants and extracellular signals. Here, we isolated adult olfactory bulb stem cells (aOBSC) that express nestin, RC2 and Sox2, and that have the capacity to generate neurons possessing mature features in culture and in vivo. The differentiation of aOBSC into neurons and glia, as well as their genetic profile, was compared to that of embryonic OBSC (eOBSC) and ganglionic eminence stem cells (GESC). While these eOBSC express neurogenin (Ngn) 1 and 2, two telencephalic dorsal markers, GESC only express Ngn2. Adult OBSC express either little or no detectable Ngn1 and 2, and they produced significantly fewer neurons in culture than eOBSC. By contrast, Dlx2 transcripts (a telencephalic ventral marker) were only clearly detected in GESC. When transplanted into the early postnatal P5-P7 OB, each of the three populations gave rise to cells with a distinct pattern of neuronal migration and/or dendritic arborization. Overall, these findings suggest that cultured NSC partially maintain their regional and temporal specification. Notably, significant neuronal migration and differentiation were only observed in vivo when the NSC were briefly exposed to fibroblast growth factor-2 (FGF-2) before grafting, a treatment that enhanced the neurogenin expression. Hence, the migration and maturation of neurons derived from transplanted NSC can be promoted by upregulating neurogenic gene expression with FGF-2.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Vergaño-Vera E,Méndez-Gómez HR,Hurtado-Chong A,Cigudosa JC,Vicario-Abejón C

doi

10.1016/j.neuroscience.2009.03.033

subject

Has Abstract

pub_date

2009-08-04 00:00:00

pages

39-54

issue

1

eissn

0306-4522

issn

1873-7544

pii

S0306-4522(09)00382-0

journal_volume

162

pub_type

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