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Título

Blocked negative selection of developing T cells in mice expressing the baculovirus p35 caspase inhibitor

AutorIzquierdo, Manuel ; Grandien, A.; Criado, Luis M.; Robles, S.; Leonardo, Esther; Albar, Juan Pablo; González de Buitrago, Gonzalo; Martínez-Alonso, Carlos
Palabras claveBaculovirus p35
Caspases
Negative selection
Thymocytes
Fecha de publicación1999
EditorEuropean Molecular Biology Organization
CitaciónEMBO Journal 18(1): 156-166 (1999)
ResumenClonal deletion in the thymus by apoptosis is involved in purging the immune system of self‐reactive T lymphocytes (negative selection). Cysteine proteases (caspases) belonging to the CPP32 family are activated during this process. We have produced transgenic mice expressing baculovirus p35, a broad‐range caspase inhibitor. Thymocytes from p35 transgenic mice were resistant in vitro to several apoptosis‐inducing agents; this resistance correlated with the inhibition of CPP32‐like activity. Negative selection in vivo of thymocytes triggered by two exogenous antigens, staphylococcal enterotoxin B superantigen and an antigenic peptide in the F5 T‐cell receptor transgenic model, was specifically inhibited in p35 transgenic mice. Our results provide direct evidence for caspase involvement in negative selection during thymocyte development.
Versión del editorhttps://doi.org/10.1093/emboj/18.1.156
URIhttp://hdl.handle.net/10261/159265
DOI10.1093/emboj/18.1.156
ISSN0261-4189
E-ISSN1460-2075
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