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La fosforilación de proteínas de las células epiteliales intestinales en la diarrea enteropatogénica de Escherichia
H A Manjarrez-Hernandez1, T J Baldwin, A Aitken
1Laboratory of Protein Structure, National Institute for Medical Research, Mill Hill, London, UK.
Lancet (London, England)
|February 29, 1992
Resumen
El Escherichia coli enteropatógeno (EPEC) desencadena la diarrea al dañar las células intestinales. La infección EPEC causa cambios citosqueléticos en los enterocitos, que involucran la cadena ligera de miosina y la actina, potencialmente a través de la activación de la proteína quinasa.
Área de la Ciencia:
- Microbiología Microbiología.
- Biología celular Biología celular.
- La patogénesis y la patogénesis.
Sus antecedentes:
- El Escherichia coli enteropatogénico (EPEC) causa diarrea a través de lesiones histopatológicas en los enterocitos del intestino delgado.
- La infección EPEC conduce a un daño citosquelético y a la pérdida de microvilli en las células intestinales.
Objetivo del estudio:
- Para investigar la fosforilación de la proteína de los enterocitos en respuesta a la infección EPEC.
- Para identificar las proteínas clave involucradas en las alteraciones citoesqueléticas inducidas por EPEC.
Principales métodos:
- La inmunoprecipitación se utilizó para identificar proteínas fosforiladas en enterocitos infectados por EPEC.
- Se evaluaron las concentraciones de actina y miosina en los sitios de infección bacteriana.
Principales resultados:
- La cadena ligera de miosina fue identificada como la principal proteína fosforilada en los enterocitos infectados por EPEC.
- Se encontraron altas concentraciones de actina y miosina en los sitios de infección EPEC.
- La adherencia bacteriana parece desencadenar directamente cambios citoesqueléticos a través de las vías de transducción de señales.
Conclusiones:
- La infección EPEC induce cambios significativos en el citoesqueleto de los enterocitos, que involucra la cadena ligera de miosina y la actina.
- Estas alteraciones citoesqueléticas pueden estar mediadas por la activación de la proteína quinasa desencadenada por la adhesión bacteriana.
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