Ethanol-induced damage to the developing spinal cord: The involvement of CCR2 signaling.
Biochim Biophys Acta Mol Basis Dis
; 1863(11): 2746-2761, 2017 11.
Article
en En
| MEDLINE
| ID: mdl-28778590
ABSTRACT
Ethanol exposure during development causes fetal alcohol spectrum disorders (FASD). A large body of evidence shows that ethanol produces multiple abnormalities in the developing central nervous system (CNS), such as smaller brain size, reduced volume of cerebral white matter, permanent loss of neurons, and alterations in synaptogenesis and myelinogenesis. The effects of ethanol on the developing spinal cord, however, receive little attention and remain unclear. We used a third trimester equivalent mouse model to investigate the effect of ethanol on the developing spinal cord. Ethanol caused apoptosis and neurodegeneration in the dorsal horn neurons of mice of early postnatal days, which was accompanied by glial activation, macrophage infiltration, and increased expression of CCR2, a receptor for monocyte chemoattractant protein 1 (MCP-1). Ethanol-induced neuronal death during development resulted in permanent loss of spinal cord neurons in adult mice. Ethanol stimulated endoplasmic reticulum (ER) stress and oxidative stress, and activated glycogen synthase kinase 3ß (GSK3ß) and c-Jun N-terminal kinase (JNK) pathways. Knocking out MCP-1 or CCR2 made mice resistant to ethanol-induced apoptosis, ER stress, glial activation, and activation of GSK3ß and JNK. CCR2 knock out offered much better protection against ethanol-induced damage to the spinal cord. Thus, developmental ethanol exposure caused permanent loss of spinal cord neurons and CCR2 signaling played an important role in ethanol neurotoxicity.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Médula Espinal
/
Transducción de Señal
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Enfermedades Neurodegenerativas
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Síndromes de Neurotoxicidad
/
Etanol
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Receptores CCR2
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Trastornos del Espectro Alcohólico Fetal
Límite:
Animals
Idioma:
En
Revista:
Biochim Biophys Acta Mol Basis Dis
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos