Infusion of anti-Nogo-A antibodies in adult rats increases growth and synapse related proteins in the absence of behavioral alterations.
Exp Neurol
; 250: 52-68, 2013 Dec.
Article
en En
| MEDLINE
| ID: mdl-24076004
ABSTRACT
Restricted structural re-growth in the adult CNS is a major limitation to fully functional recovery following extensive CNS trauma. This limitation is partly due to the presence of growth inhibitory proteins, in particular, Nogo-A. Pre-clinical studies have demonstrated that intrathecally infused anti-Nogo-A antibodies are readily distributed via the cerebrospinal fluid penetrating throughout the spinal cord and brain, where they promote sprouting, axonal regeneration and improved functional recovery after CNS injury. Whether anti-Nogo-A treatments of intact animals might induce behavioral alterations has not been systematically tested. This is addressed here in an adult rat model of chronic intrathecal infusion of function-blocking anti-Nogo-A antibodies for 2 to 4weeks. We observed by proteomic and immunohistochemical techniques that chronic Nogo-A neutralization in the intact CNS increased expression of cytoskeletal, fiber-growth-related, and synaptic proteins in the hippocampus, a brain region which might be particularly sensitive to Nogo-A depletion due to the high expression level of Nogo-A. Despite such molecular and proteomic changes, Nogo-A blockade was not associated with any pronounced cognitive-behavioral changes indicative of hippocampal functional deficiency across several critical tests. Our results suggest that the plastic changes induced by Nogo-A blockade in the adult hippocampus are counter-balanced by homeostatic mechanisms in the intact and the injured CNS. The data indicate that anti-Nogo-A therapy appears safe in the adult CNS over 4weeks of continuous administration.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Conducta Animal
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Hipocampo
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Anticuerpos Monoclonales
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Proteínas de la Mielina
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Plasticidad Neuronal
Límite:
Animals
Idioma:
En
Revista:
Exp Neurol
Año:
2013
Tipo del documento:
Article
País de afiliación:
Suiza