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C3G forma complejos con Bcr-Abl y p38αMAPK en las adhesiones focales en células de leucemia mieloide crónica. Implicaciones en la regulación de la adhesión de las células leucémicas

Authors: Ortiz-Rivero, Sara; Maia, Vera; Sanz, María; Gutierrez-Berzal, Javier; Álvarez-Fernández, Indira; Gutiérrez-Herrero, Sara; Pereda, José M. de; +2 Authors

C3G forma complejos con Bcr-Abl y p38αMAPK en las adhesiones focales en células de leucemia mieloide crónica. Implicaciones en la regulación de la adhesión de las células leucémicas

Abstract

C3G y Bcr-Abl forman complejos con las proteínas de adhesión focal CrkL, p 130Cas, Cbl y Abi1 a través de interacciones SH3/SH3-b. La asociaci6n entre C3G y Bcr-Abl disminuye en células de leucemia mieloide crónica (LMC) K562 silenciadas para Abi1 Y p130Cas, lo que sugiere que Abil y pl30Cas son muy relevantes en esta interacción. Por otra parte, el silenciamiento de C3G, Abi1 o Cbl disminuye la adhesión a la fibronectina, mientras que eI silenciamiento de p 130Cas la aumenta. EI análisis mediante arrays de dominios SH3 indican que los dominios SH-b de C3G, Cbl y p130Cas interaccionan directamente con proteínas comunes relacionadas con la regulación de la adhesión y migración celular. Estudios de inmunoprecipitación e inmunofluorescencia revelan que C3G forma complejos con proteínas de las adhesiones focales como la paxilina y FAK y sus formas fosforiladas. Además, C3G, Abil, Cbl y p130Cas regulan la expresión y fosforilación de la paxilina y FAK. Asimismo, p38alfa MAPK también participa en la regulación de la adhesión las células de LMC, interaccionando con C3G, CrkL, FAK y paxilina y regulando la expresión de paxilina, CrkL e integrina alfa5, así como la fosforilación de paxilina. Por otra parte, el doble silenciamiento C3G/p38alfa disminuye la adhesión a fibronectina, de manera similar al silenciamiento individual de cada uno de estos genes. Estos datos sugieren que C3G y p38alfa MAPK actúan a través de una ruta común que regula la adhesión celular en células K562, tal Y como se describió anteriormente en la regulaci6n de la apoptosis. Nuestros resultados indican que la ruta C3G-p38alfaMAPK regula la adhesi6n celular en K562 a través de la interacción con proteínas de las adhesiones focales y Bcr-Abl, modulando la formación de diferentes complejos proteicos de las adhesiones focales.

Resumen del trabajo presentado al XXXVI Congreso de la Sociedad Española de Bioquímica y Biología Molecular, celebrado en Madrid (España) del 3 al 6 de septiembre de 2013.

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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