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La mutación específica de GPR12 en cetáceos está asociada funcionalmente con el engrosamiento de la grasa
Yuehua Wang1, Qian Zhang1, Guiping Xu1
1Jiangsu Key Laboratory for Biodiversity Conservation and Sustainable Utilization in the Middle and Lower Reaches of the Yangtze River Basin, College of Life Sciences, Nanjing Normal University, Nanjing, China.
Gene
|August 29, 2025
Resumen
Los cetáceos desarrollaron grasa más gruesa para la vida acuática. Un cambio genético específico en los cetáceos puede reducir la descomposición de la grasa, ayudando al desarrollo de la grasa y la adaptación térmica en entornos marinos.
Área de la Ciencia:
- Biología de los mamíferos marinos
- La genética evolutiva
- Biología molecular
Sus antecedentes:
- Los mamíferos marinos desarrollaron de forma independiente grasa gruesa para los desafíos térmicos en entornos acuáticos.
- La grasa, un tejido adiposo especializado, es crucial para el aislamiento, el almacenamiento de energía, la flotabilidad y la locomoción.
- Los mecanismos moleculares que impulsan el engrosamiento de la grasa siguen siendo en gran medida desconocidos.
Objetivo del estudio:
- Para investigar los mecanismos evolutivos moleculares detrás del engrosamiento de la grasa en los cetáceos.
- Identificar los factores genéticos que contribuyen a las adaptaciones únicas del tejido adiposo en los mamíferos marinos.
Principales métodos:
- Realizó un análisis evolutivo del gen GPR12 de los mamíferos.
- Se realizaron experimentos celulares in vitro para evaluar el impacto funcional de una sustitución de aminoácidos específica para los cetáceos.
Principales resultados:
- Se identificó una sustitución de aminoácidos específica de los cetáceos en el gen GPR12, ausente en otros mamíferos.
- Se demostró que esta sustitución reduce potencialmente la expresión de lipasa triglicérida adiposa (ATGL), disminuyendo así la actividad lipolítica in vitro.
Conclusiones:
- Se descubrieron señales genéticas que influyen en la capacidad de lipólisis en los cetáceos.
- Estos cambios genéticos pueden representar un mecanismo evolutivo para el engrosamiento de la grasa durante la adaptación acuática secundaria de los cetáceos.
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