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Papel de la proteína mielina P0 como una molécula de adhesión homofílica
M T Filbin1, F S Walsh, B D Trapp
1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.
Nature
|April 26, 1990
Resumen
Mielina del sistema nervioso periférico Mielina del sistema nervioso periférico
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología celular Biología celular.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La mielina del sistema nervioso periférico, formada por las células de Schwann, permite una rápida conducción de impulsos nerviosos.
- El mecanismo que mantiene la estructura compacta de la mielina sigue sin estar claro.
- La proteína P0 es la proteína más abundante en la mielina del sistema nervioso periférico.
Objetivo del estudio:
- Investigar el papel de la proteína P0 en el mantenimiento de la estructura de la mielina del sistema nervioso periférico.
- Para probar la hipótesis de que la proteína P0 media las interacciones homofílicas para mantener juntas las capas de mielina.
Principales métodos:
- Transfección de células de ovario de hámster chino (CHO) para expresar la proteína P0.
- Evaluación de la adhesión y agregación celular en suspensión.
- Análisis microscópico de las interacciones célula-célula y las estructuras de la membrana.
Principales resultados:
- Las células CHO que expresan la proteína P0 formaron grandes agregados en suspensión.
- Las células que carecen de la proteína P0 no mostraron agregación significativa.
- Las células que expresan P0 formaron específicamente estructuras semejantes a desmosomas entre membranas apostas.
Conclusiones:
- La proteína P0 actúa como una molécula de adhesión homofílica.
- La adhesión mediada por P0 es responsable de la estructura compacta de la mielina del sistema nervioso periférico.
- La inclusión de la proteína P0 en la familia de supergenes de inmunoglobulinas apoya su papel en el reconocimiento y la adhesión celular.
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