Growth hormone pathways signaling for cell proliferation and survival in hippocampal neural precursors from postnatal mice.
BMC Neurosci
; 15: 100, 2014 Aug 26.
Article
em En
| MEDLINE
| ID: mdl-25156632
ABSTRACT
BACKGROUND:
Accumulating evidence suggests that growth hormone (GH) may play a major role in the regulation of postnatal neurogenesis, thus supporting the possibility that it may be also involved in promoting brain repair after brain injury. In order to gain further insight on this possibility, in this study we have investigated the pathways signaling the effect of GH treatment on the proliferation and survival of hippocampal subgranular zone (SGZ)-derived neurospheres.RESULTS:
Our results demonstrate that GH treatment promotes both proliferation and survival of SGZ neurospheres. By using specific chemical inhibitors we have been also able to demonstrate that GH treatment promotes the activation of both Akt-mTOR and JNK signaling pathways, while blockade of these pathways either reduces or abolishes the GH effects. In contrast, no effect of GH on the activation of the Ras-ERK pathway was observed after GH treatment, despite blockade of this signaling path also resulted in a significant reduction of GH effects. Interestingly, SGZ cells were also capable of producing GH, and blockade of endogenous GH also resulted in a decrease in the proliferation and survival of SGZ neurospheres.CONCLUSIONS:
Altogether, our findings suggest that GH treatment may promote the proliferation and survival of neural progenitors. This effect may be elicited by cooperating with locally-produced GH in order to increase the response of neural progenitors to adequate stimuli. On this view, the possibility of using GH treatment to promote neurogenesis and cell survival in some acquired neural injuries may be envisaged.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hormônio do Crescimento
/
Sobrevivência Celular
/
Proliferação de Células
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Neurogênese
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Células-Tronco Neurais
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Hipocampo
Limite:
Animals
/
Humans
Idioma:
En
Revista:
BMC Neurosci
Assunto da revista:
NEUROLOGIA
Ano de publicação:
2014
Tipo de documento:
Article