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Derivation of Thymic Lymphoma T-cell Lines from Atm-/- and p53-/- Mice
Published on: April 3, 2011
p53 se requiere para la apoptosis inducida por radiación en timocitos de ratón
S W Lowe1, E M Schmitt, S W Smith
1Department of Biology, Massachusetts, Cambridge 02139.
Nature
|April 29, 1993
Resumen
El supresor tumoral p53 es crucial para la apoptosis inducida por radiación en los timocitos de ratón. Sin embargo, la p53 no es esencial para todas las formas de muerte celular programada en el timo.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Inmunología Inmunología.
- Investigación de Investigación del Cáncer.
Sus antecedentes:
- El gen supresor de tumores p53 es frecuentemente mutado en los cánceres humanos.
- p53 regula los genes involucrados en la reparación del ADN, el ciclo celular y la apoptosis.
- La apoptosis es crítica para el desarrollo de las células T, pero los mecanismos para la apoptosis no mediada por TCR no están claros.
Objetivo del estudio:
- Para investigar el papel de p53 en la apoptosis inducida por radiación de los timocitos de ratón.
- Para determinar si se requiere p53 para todas las formas de apoptosis de timocitos.
Principales métodos:
- Análisis de la apoptosis de timocitos en ratones que carecen del gen p53.
- Exposición de los timocitos a la radiación ionizante, a los glucocorticoides y a los compuestos que imitan el receptor de las células T.
Principales resultados:
- Los timocitos inmaduros que carecían de p53 sufrieron una apoptosis normal tras la estimulación con glucocorticoides y imitaciones de receptores de células T.
- Los timocitos deficientes en p53 exhibieron resistencia a los efectos apoptóticos de la radiación ionizante.
- p53 se requiere específicamente para la muerte celular de timocitos inducida por radiación.
Conclusiones:
- p53 juega un papel crítico en la mediación de la apoptosis inducida por la radiación ionizante en los timocitos.
- El supresor tumoral p53 no es universalmente requerido para todas las vías apoptóticas en el timo.
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