The endocannabinoid system promotes astroglial differentiation by acting on neural progenitor cells.
J Neurosci
; 26(5): 1551-61, 2006 Feb 01.
Article
en En
| MEDLINE
| ID: mdl-16452678
ABSTRACT
Endocannabinoids exert an important neuromodulatory role via presynaptic cannabinoid CB1 receptors and may also participate in the control of neural cell death and survival. The function of the endocannabinoid system has been extensively studied in differentiated neurons, but its potential role in neural progenitor cells remains to be elucidated. Here we show that the CB1 receptor and the endocannabinoid-inactivating enzyme fatty acid amide hydrolase are expressed, both in vitro and in vivo, in postnatal radial glia (RC2+ cells) and in adult nestin type I (nestin(+)GFAP+) neural progenitor cells. Cell culture experiments show that CB1 receptor activation increases progenitor proliferation and differentiation into astroglial cells in vitro. In vivo analysis evidences that, in postnatal CB1(-/-) mouse brain, progenitor proliferation and astrogliogenesis are impaired. Likewise, in adult CB1-deficient mice, neural progenitor proliferation is decreased but is increased in fatty acid amide hydrolase-deficient mice. In addition, endocannabinoid signaling controls neural progenitor differentiation in the adult brain by promoting astroglial differentiation of newly born cells. These results show a novel physiological role of endocannabinoids, which constitute a new family of signaling cues involved in the regulation of neural progenitor cell function.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Células Madre
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Astrocitos
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Receptor Cannabinoide CB1
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Endocannabinoides
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Moduladores de Receptores de Cannabinoides
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Amidohidrolasas
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Neuronas
Límite:
Animals
Idioma:
En
Revista:
J Neurosci
Año:
2006
Tipo del documento:
Article
País de afiliación:
España