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Visualization and Quantification of Brown and Beige Adipose Tissues in Mice using [18F]FDG Micro-PET/MR Imaging
Published on: July 1, 2021
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Un nuevo giro en el metabolismo de la grasa marrón
Harriet Wallberg-Henriksson1, Juleen R Zierath
1Department of Molecular Medicine and Surgery, Section of Integrative Physiology, Karolinska Institutet, S-171 77 Stockholm, Sweden.
Cell
|April 7, 2009
Resumen
El factor de transcripción twist-1 regula negativamente el PGC-1alfa, un motor clave de la biogénesis mitocondrial y la termogénesis en la grasa marrón. Este hallazgo revela un mecanismo de retroalimentación que controla el gasto energético.
Área de la Ciencia:
- Metabolismo y Endocrinología.
- Biología Molecular Biología Molecular
- Biología del tejido adiposo Biología del tejido adiposo
Sus antecedentes:
- El coactivador 1-alfa del receptor gamma activado por el proliferador peroxisomático (PGC-1alpha) es crucial para la biogénesis mitocondrial y la termogénesis en el tejido adiposo marrón.
- Comprender la regulación de PGC-1alpha es esencial para controlar el gasto energético y la homeostasis metabólica.
Objetivo del estudio:
- Para identificar nuevos reguladores de PGC-1alfa en el tejido adiposo marrón.
- Para dilucidar los mecanismos moleculares por los cuales se controla la actividad de PGC-1alpha.
Principales métodos:
- Investigó el papel de los factores de transcripción en la regulación del PGC-1alpha.
- Utilizó técnicas de biología molecular para evaluar la expresión génica y las interacciones de proteínas.
Principales resultados:
- Identificó twist-1 como un factor de transcripción que interactúa directamente con y reprime el PGC-1alpha.
- Se demostró que twist-1 actúa como un regulador de retroalimentación negativa de la expresión génica mediada por PGC-1alfa.
- Mostró el impacto de twist-1 en la biogénesis mitocondrial y los programas de genes termogénicos.
Conclusiones:
- Twist-1 es un nuevo regulador negativo de PGC-1alpha en el tejido adiposo marrón.
- Este eje regulador proporciona un nuevo objetivo para modular la función mitocondrial y el metabolismo energético.
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