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La Irisina Media los Efectos en los Huesos y la Grasa a través de los Receptores de Integrina αV
Hyeonwoo Kim1, Christiane D Wrann2, Mark Jedrychowski1
1Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA; Department of Cell Biology, Harvard University Medical School, Boston, MA 02115, USA.
Cell
|December 15, 2018
Resumen
La irisina, la hormona del ejercicio, se une a las integrinas αV, actuando como su receptor. Este hallazgo explica la irisina
Área de la Ciencia:
- Fisiología del ejercicio
- Biología molecular
- Biología ósea
Sus antecedentes:
- La irisina, una hormona secretada por el músculo, media los beneficios del ejercicio en varios tejidos.
- Los efectos esqueléticos de la irisina y su receptor siguen siendo en gran medida desconocidos.
- Comprender el papel esquelético de la irisina es crucial para la salud ósea y la ciencia del ejercicio.
Objetivo del estudio:
- Para identificar el receptor de la irisina.
- Para aclarar el papel de la irisina en la remodelación esquelética y la pérdida ósea.
- Para entender los mecanismos moleculares que subyacen a las acciones esqueléticas de la irisina.
Principales métodos:
- Estudios biofísicos para identificar las interacciones irisina-integrina.
- Inhibición química de las integrinas αV en los osteocitos y las células grasas.
- Ablación genética de FNDC5 (irisina) en un modelo de pérdida ósea inducida por ovariotomia.
Principales resultados:
- La irisina se une a las integrinas αV, específicamente a las integrinas αV/β5.
- La inhibición de la αV integrina bloquea la señalización de la irisina en los osteocitos y las células grasas.
- La irisina mejora la supervivencia osteocítica y la producción de esclerostina, mientras que la ablación de FNDC5 previene la pérdida ósea inducida por la ovariectomía.
Conclusiones:
- Las integrinas αV sirven como el receptor de la irisina.
- La irisina juega un papel importante en la remodelación esquelética y la prevención de la pérdida ósea.
- La identificación del receptor de irisina avanza en la comprensión de los beneficios del ejercicio para la salud ósea.
Palabras clave:
Receptor de las irisinasResorción óseaintegrina αVLa irisinael osteocitoy la esclerostinatejidos adiposos subcutáneos (inguinales)La primera vez que laMás Videos Relacionados
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