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Feromona proteica que afecta la receptividad de las hembras en una salamandra terrestre
S M Rollmann1, L D Houck, R C Feldhoff
1Department of Ecology and Evolution, University of Chicago, 1101 East 57 Street, Chicago, IL 60637, USA. Department of Zoology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA. smrollma@midway.uchicago.edu
Science (New York, N.Y.)
|September 18, 1999
Resumen
Los investigadores descubrieron una proteína, el factor de receptividad plethodontid (PRF), en las salamandras macho que aumenta la receptividad femenina durante el cortejo. Esta feromona es una feromona.
Área de la Ciencia:
- * Zoología Zoología.
- * El comportamiento animal.
- * Biología Molecular.
Sus antecedentes:
- * Las salamandras terrestres macho poseen glándulas submandibulares que producen moléculas de señalización.
- * La receptividad femenina es crucial para la reproducción exitosa en muchas especies, incluyendo Plethodon jordani.
Objetivo del estudio:
- * Para aislar y caracterizar una feromona proteica de la glándula submandibular del macho Plethodon jordani.
- * Para determinar la función de esta feromona en el comportamiento reproductivo femenino.
- * Investigar las bases moleculares y las implicaciones evolutivas de la feromona.
Principales métodos:
- * Aislamiento y purificación de una proteína de 22 kilodaltones de las glándulas de la salamandra macho.
- * Entrega experimental de la proteína purificada a las hembras durante el cortejo para evaluar los cambios de comportamiento.
- * Análisis molecular que incluye búsquedas de transcripción, clonación, secuenciación y homología del ADNc.
Principales resultados:
- * Se aisló e identificó una proteína, denominada factor de receptividad plethodontida (PRF, por sus siglas en inglés).
- * PRF aumentó significativamente la receptividad femenina cuando se administró experimentalmente.
- * PRF exhibe homología a las citoquinas, específicamente a la familia de la interleucina-6, lo que sugiere una función novedosa para esta clase de proteínas.
Conclusiones:
- * El factor de receptividad plethodontid (PRF) funciona como una feromona para mejorar la receptividad femenina en Plethodon jordani.
- * Este hallazgo revela un papel no reconocido previamente para las citoquinas en la comunicación y reproducción animal.
- * El estudio proporciona información sobre la evolución de la señalización reproductiva en anfibios.
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