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Published on: March 11, 2017
Papel de la estearoil-CoA desaturasa-1 en la pérdida de peso mediada por leptina
Paul Cohen1, Makoto Miyazaki, Nicholas D Socci
1Laboratory of Molecular Genetics, Center for Studies in Physics and Biology, Rogosin Institute, Howard Hughes Medical Institute, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.
Resumen
La leptina es la leptina.
Área de la Ciencia:
- La investigación en el metabolismo.
- Biología molecular La biología molecular.
- Genética La genética.
Sus antecedentes:
- Los efectos metabólicos de la leptina se extienden más allá de la supresión del apetito.
- Los mecanismos precisos de las acciones metabólicas de la leptina requieren una mayor aclaración.
Objetivo del estudio:
- Para identificar los genes regulados por la leptina en el hígado utilizando perfiles de transcripción.
- Para investigar el papel de la estearoil-CoA desaturasa-1 hepática (SCD-1) en la mediación de los efectos metabólicos de la leptina.
Principales métodos:
- Utilizó perfiles de transcripción en el hígado de ratón ob/ob para identificar genes regulados por leptina.
- Se evaluó el impacto de las mutaciones del gen stearoyl-CoA desaturasa-1 (SCD-1) en los parámetros metabólicos en ratones.
Principales resultados:
- La leptina reprimió específicamente los niveles de ARN y la actividad enzimática de la estearoil-CoA desaturasa-1 (SCD-1) hepática.
- Los ratones que carecían de SCD-1 exhibieron magreza e hipermetabolismo.
- Los ratones ob/ob con mutaciones SCD-1 mostraron una reducción de la obesidad, un aumento del gasto energético y una disminución de la producción de triglicéridos hepáticos y VLDL.
Conclusiones:
- La regulación a la baja de la estearoil-CoA desaturasa-1 hepática (SCD-1) es un mecanismo clave para las acciones metabólicas de la leptina.
- Dirigirse a la SCD-1 puede ofrecer estrategias terapéuticas para los trastornos metabólicos.
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