Caracterización conductual y neuroinmune de la resiliencia al estrés social: Efectos reforzantes de la cocaína
- Francisco Ródenas-González
- María del Carmen Blanco-Gandía
- José Miñarro López
- Marta Rodríguez-Arias
ISSN: 0214-4840
Año de publicación: 2021
Volumen: 33
Número: 4
Páginas: 319-331
Tipo: Artículo
Otras publicaciones en: Adicciones: Revista de socidrogalcohol
Resumen
Numerosos estudios preclínicos han demostrado que el estrés social incrementa la vulnerabilidad a los efectos reforzantes de la cocaína. Sin embargo, los resultados obtenidos no son homogéneos, observándose siempre una subpoblación que no muestra dicho incremento. Utilizando el modelo de derrota social (DS) repetida en ratones, en este trabajo hemos querido caracterizar conductualmente a los ratones resilientes al incremento de los efectos reforzantes de la cocaína inducido por el estrés social. Utilizamos ratones adultos macho de la cepa C57/BL6 a los que sometimos al protocolo de DS repetida y tres semanas más tarde, realizamos el Condicionamiento de Preferencia de Lugar (CPL) inducido por una dosis no efectiva de cocaína (1mg/ kg). Una vez finalizado este procedimiento se midieron los niveles estriatales de interleucina 6, ya que el estrés social produce una respuesta de neuroinflamación. No se observó CPL en los ratones controles, pero los animales derrotados tomados en conjunto desarrollaron preferencia. Sin embargo, esta muestra se pudo dividir en ratones resilientes (no desarrollaron preferencia) y susceptibles (presentaron CPL). Durante las derrotas sociales, los animales resilientes pasaron menos tiempo en las conductas de huida y sumisión que los catalogados como susceptible y presentaron conductas de ataque hacia el ratón residente, manifestando por tanto resistencia a ser derrotados. No se observaron diferencias en la respuesta de neuroinflamación, probablemente debido al largo periodo de tiempo trascurrido desde la última derrota social. Nuestros resultados sugieren que un estilo de afrontamiento activo al estrés social va a ser determinante en la protección del sujeto a desarrollar un trastorno por uso de drogas
Información de financiación
Ministerio de Ciencia, Innovaci?n y Universidades (MICINN), PSI2017-83023. Instituto de Salud Carlos III, Red de Trastornos Adictivos (RD16/0017/0007) and European Union, ERDF Funds ?a way to build Europe?.Financiadores
- Ministerio de Ciencia, Innovación y Universidades Spain
- European Commission European Union
-
Instituto de Salud Carlos III
Spain
- RD16/0017/0007
-
Ministerio de Ciencia e Innovación
Spain
- PSI2017-83023
- European Regional Development Fund European Union
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