Sincronización de osciladores circadianos y su comunicación con el balance energético en el carpı́n : Implicaciones en el bienestar
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2024
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13/03/2024
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Universidad Complutense de Madrid
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Abstract
El sistema circadiano en los peces teleósteos consiste en una compleja red de osciladores coordinados entre sí, que se sincronizan con los ciclos ambientales, fundamentalmente al cicloluz/oscuridad. El ciclo ayuno/ingesta es también un sincronizador importante para los osciladores periféricos como el hígado, aunque se desconoce la relevancia relativa de la sincronización fótica frente a la no fótica en este tejido. Es esencial ahondar en estas influencias para entender cómo la adecuada recepción de señales externas (como la luz y la comida) puede afectar a la homeostasis temporal y energética de los peces. Mientras que en los mamíferos se ha sugerido que la insulina y el receptor nuclear REV-ERBα podrían mediar la sincronización hepática al horario de alimentación, estos mecanismos no se han explorado aún en los teleósteos. Se sabe que alteraciones en los ritmos diarios luz/oscuridad y ayuno/ingesta afectan a la coordinación temporal de los animales. Sin embargo, no se comprenden totalmente los efectos de esta cronodisrupción sobre tres aspectos básicos para el bienestar en los peces: la homeostasis energética, la ansiedad y el estrés...
The circadian system of teleost fishes comprises an intricate network of synchronizedoscillators, cycling in harmony with environmental patterns, primarily the light/dark cycle. The fasting/feeding cycle also serves as a key synchronizer for peripheral oscillators, such as the liver, though the relative importance of photic versus non-photic synchronization in this issue remains unclear. It is pivotal to delve into these influences to understand how the proper reception of external signals (light and food) can impact the temporal and energy homeostasis of fish. While in mammals it has been suggested that insulin and the nuclear receptor REV-ERBα could mediate hepatic synchronization to the feeding schedule, these mechanisms have not yet been explored in teleosts. It is established that disruptions in daily light/dark and fasting/feeding cycles affectthe temporal coordination of animals. However, the full effects of this chronodisruption on energy homeostasis, anxiety, and stress, which are key aspects of fish welfare, are not fully understood...
The circadian system of teleost fishes comprises an intricate network of synchronizedoscillators, cycling in harmony with environmental patterns, primarily the light/dark cycle. The fasting/feeding cycle also serves as a key synchronizer for peripheral oscillators, such as the liver, though the relative importance of photic versus non-photic synchronization in this issue remains unclear. It is pivotal to delve into these influences to understand how the proper reception of external signals (light and food) can impact the temporal and energy homeostasis of fish. While in mammals it has been suggested that insulin and the nuclear receptor REV-ERBα could mediate hepatic synchronization to the feeding schedule, these mechanisms have not yet been explored in teleosts. It is established that disruptions in daily light/dark and fasting/feeding cycles affectthe temporal coordination of animals. However, the full effects of this chronodisruption on energy homeostasis, anxiety, and stress, which are key aspects of fish welfare, are not fully understood...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Biológicas, leída el 13-03-2024. Tesis formato europeo (compendio de artículos)