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El estrés impulsa un cambio en las preferencias sexuales
Resumen
Distintos circuitos cerebrales en ratones dictan las preferencias sexuales. Esta investigación identifica vías neuronales específicas responsables de controlar los comportamientos de apareamiento y la selección de pareja en roedores machos y hembras.
Área de la Ciencia:
- La neurociencia
- Biología del comportamiento
- La genética
Sus antecedentes:
- Comprender la base neuronal de la preferencia sexual es crucial para comprender el comportamiento animal y sus fundamentos evolutivos.
- Investigaciones anteriores han implicado varias regiones cerebrales en la regulación de los comportamientos reproductivos, pero los circuitos específicos que controlan la preferencia de la pareja siguen sin caracterizarse en gran medida.
Objetivo del estudio:
- Identificar y caracterizar los distintos circuitos neuronales que gobiernan las preferencias sexuales en ratones.
- Elucidar los mecanismos moleculares y celulares subyacentes al control de la selección de pareja en un sistema modelo de mamíferos.
Principales métodos:
- Utilizó una combinación de manipulación genética, quimiogenética e imágenes de calcio in vivo en ratones.
- Empleó ensayos conductuales para cuantificar la preferencia de pareja y las grabaciones de actividad neuronal durante las interacciones sociales.
Principales resultados:
- Identificó poblaciones neuronales específicas dentro de la amígdala y el área preóptica que regulan diferencialmente las preferencias sexuales masculinas y femeninas.
- Se ha demostrado que la activación o inhibición de estos circuitos alteran la elección de pareja.
- Reveló distintos circuitos para la preferencia del sexo opuesto frente a las parejas del mismo sexo.
Conclusiones:
- Las preferencias sexuales en ratones están controladas por circuitos cerebrales discretos, pero que interactúan.
- Estos hallazgos proporcionan una base para comprender la base neurobiológica del comportamiento sexual y la elección de pareja.
- Destaca el potencial de las intervenciones a nivel de circuito en la modulación de comportamientos sociales.
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