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Differentiation of Functional Osteoclasts from Human Peripheral Blood CD14+ Monocytes
Published on: January 27, 2023
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El ligando de la osteoprotegerina es una citocina que regula la diferenciación y activación de los osteoclastos
1Department of Pathology, Amgen, Inc., Thousand Oaks, California 91320-1789, USA.
Cell
|May 6, 1998
Resumen
La diferenciación y activación de los osteoclastos están reguladas por el ligando de la osteoprotegerina (OPGL), una citocina relacionada con el TNF. OPGLGL es una OPGL que se utiliza para la producción de petróleo.
Área de la Ciencia:
- Biología de los huesos Biología de los huesos
- La señalización de las citocinas.
- La osteoclastogénesis es la osteoclastogénesis.
Sus antecedentes:
- La osteoclastogénesis, el desarrollo de osteoclastos que reabsorben el hueso, tradicionalmente requiere células del estroma, vitamina D3 y glucocorticoides.
- Los reguladores moleculares precisos de la diferenciación y activación de los osteoclastos han sido un foco de investigación.
Objetivo del estudio:
- Para identificar el ligando de la osteoprotegerina (OPG).
- Aclarar el papel de este ligando en el desarrollo y la función de los osteoclastos.
Principales métodos:
- Modelo de cocultura de la osteoclastogénesis in vitro.
- Análisis de la expresión génica en células progenitoras hematopoyéticas.
- Estudios in vitro e in vivo con osteoclastos aislados y ratones adultos normales.
Principales resultados:
- Se identificó una citocina relacionada con el TNF como el ligando OPG (OPGL).
- OPGL estimula la diferenciación de los osteoclastos al unirse a las células progenitoras hematopoyéticas comprometidas e inducir genes específicos.
- OPGL activa directamente los osteoclastos maduros y causa hipercalcemia in vivo.
- OPG bloquea efectivamente los efectos de la OPGL in vitro e in vivo.
Conclusiones:
- OPGL es un factor clave de diferenciación y activación de los osteoclastos.
- OPGL y OPG son reguladores extracelulares críticos del desarrollo de los osteoclastos.
- Este descubrimiento simplifica los modelos de osteoclastogénesis in vitro al eliminar la necesidad de células estomales, vitamina D3 y glucocorticoides.
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