2012, Número 5
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Salud Mental 2012; 35 (5)
Factores que modifican el efecto antidepresivo de los estrógenos: evidencia preclínica
Estrada-Camarena E
Idioma: Español
Referencias bibliográficas: 69
Paginas: 419-426
Archivo PDF: 119.09 Kb.
RESUMEN
A nivel mundial la prevalencia de los trastornos depresivos ha aumentado,
encontrándose un mayor número de casos en individuos del
género femenino. En particular se sabe que en la mujer la ocurrencia
de episodios depresivos varía a lo largo del ciclo reproductivo,
observándose picos en aquellos periodos en los que se presentan
cambios hormonales importantes como ocurre durante la perimenopausia,
periodo que antecede a la menopausia. De hecho se reporta
que en la perimenopausia aumenta la vulnerabilidad para desarrollar
trastornos afectivos en mujeres vulnerables.
Una de las alternativas de tratamiento para la depresión asociada
a los cambios hormonales que se presentan durante ese periodo es la terapia
de reemplazo hormonal con estrógenos (TRE), sin embargo su uso
ha dado resultados contradictorios y, hasta el momento, no se ha alcanzado
un consenso. Diversos factores podrían explicar las discrepancias
encontradas en los trabajos clínicos, entre ellos el tipo de estrógeno, la
dosis utilizada, la duración del tratamiento, el estado endocrino de las
mujeres incluidas en los estudios y la edad de las mismas.
El presente trabajo revisa evidencia basada en modelos animales
en donde se analizan aquellos factores que parecen influir en el
efecto antidepresivo de los estrógenos y la compara con la evidencia
obtenida en estudios clínicos. Como modelo de menopausia se utiliza
a la ovariectomía (OVX) y como modelo para evaluar el potencial antidepresivo
de diferentes fármacos se usa el modelo de nado forzado.
En este trabajo se revisa el efecto del 17 β-estradiol, el 17 α-etinil-
estradiol, el raloxifeno, el tamoxifeno y el dietil-estilbestrol. Además
se discute la importancia del tipo de compuesto estrogénico utilizado,
la dosis y el tiempo de administración de cada uno de los compuestos,
así como la edad y el periodo posterior a la OVX.
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