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Artículo

Thyroid hormones promote differentiation of oligodendrocyte progenitor cells and improve remyelination after cuprizone-induced demyelination

Franco, Paula GabrielaIcon ; Silvestroff, LucasIcon ; Soto, Eduardo FranciscoIcon ; Pasquini, Juana MariaIcon
Fecha de publicación: 08/2008
Editorial: Academic Press Inc Elsevier Science
Revista: Experimental Neurology
ISSN: 0014-4886
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

In the present work we analyzed the capacity of thyroid hormones (THs) to improve remyelination using a rat model of cuprizone-induced demyelination previously described in our laboratories. Twenty one day old Wistar rats were fed a diet containing 0.6 % cuprizone for two weeks to induce demyelination. After cuprizone withdrawal, rats were injected with triiodothyronine (T3). Histological studies carried out in these animals revealed that remyelination in the corpus callosum (CC) of T3-treated rats improved markedly when compared to saline treated animals. The cellular events occurring in the CC and in the subventricular zone (SVZ) during the first week of remyelination were analyzed using specific oligodendroglial cell (OLGc) markers. In the CC of saline treated demyelinated animals, mature OLGcs decreased and oligodendroglial precursor cells (OPCs) increased after one week of spontaneous remyelination. Furthermore, the SVZ of these animals showed an increase in early progenitor cell numbers, dispersion of OPCs and inhibition of Olig and Shh expression compared to non-demyelinated animals. The changes triggered by demyelination were reverted after T3 administration, suggesting that THs could be regulating the emergence of remyelinating oligodendrocytes from the pool of proliferating cells residing in the SVZ. Our results also suggest that THs receptor b mediates T3 effects on remyelination. These results support a potential role for THs in the remyelination process that could be used to develop new therapeutic approaches for demyelinating diseases.
Palabras clave: CUPRIZONE , DEMYELINATION , OLIGODENDROCYTE DIFFERENTIATION , REMYELINATION , SUBVENTRICULAR ZONE , THYROID HORMONES
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/152467
DOI: http://dx.doi.org/10.1016/j.expneurol.2008.04.039
URL: https://www.sciencedirect.com/science/article/pii/S0014488608001829
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Articulos(IQUIFIB)
Articulos de INST.DE QUIMICA Y FISICO-QUIMICA BIOLOGICAS "PROF. ALEJANDRO C. PALADINI"
Citación
Franco, Paula Gabriela; Silvestroff, Lucas; Soto, Eduardo Francisco; Pasquini, Juana Maria; Thyroid hormones promote differentiation of oligodendrocyte progenitor cells and improve remyelination after cuprizone-induced demyelination; Academic Press Inc Elsevier Science; Experimental Neurology; 212; 2; 8-2008; 458-467
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