Gliadins induce TNFalpha production through cAMP-dependent protein kinase A activation in intestinal cells (Caco-2)
J. physiol. biochem
; 66(2): 153-159, jun. 2010.
Artigo
em Inglês
| IBECS
| ID: ibc-122839
Biblioteca responsável:
ES1.1
Localização: BNCS
RESUMEN
No disponible
ABSTRACT
Celiac disease is an autoimmune enteropathy caused by a permanent intolerance to gliadins. In this study the effects of two gliadin-derived peptides (PA2, PQPQLPYPQPQLP and PA9, QLQPFPQPQLPY) on TNFalpha production by intestinal epithelial cells (Caco-2) and whether these effects were related to protein kinase A (PKA) and/or -C (PKC) activities have been evaluated. Caco-2 cell cultures were challenged with several sets of gliadin peptides solutions (0.25 mg/mL), with/without different activators of PKA or PKC, bradykinin (Brdkn) and pyrrolidine dithiocarbamate (PDTC). The gliadin-derived peptides assayed represent the two major immunodominant epitopes of the peptide 33-mer of alpha-gliadin (5688) (LQLQPFPQPQLPYPQPQLPYPQPQLPYPQPQPF). Both peptides induced the TNFalpha production triggering the inflammatory cell responses, the PA2 being more effective. The addition of the peptides in the presence of dibutyril cyclic AMP (cAMP), Brdkn or PDTC, inhibited the TNFalpha production. The PKC-activator phorbol 12-myristate 13-diacetate additionally increased the PA2- and PA9-induced TNFalpha production. These results link the gliadin-derived peptides induced TNFalpha production through cAMP-dependent PKA activation, where ion channels controlling calcium influx into cells could play a protective role, and requires NF-êB activation (AU)
Buscar no Google
Coleções:
Bases de dados nacionais
/
Espanha
Base de dados:
IBECS
Assunto principal:
Doença Celíaca
/
Fator de Necrose Tumoral alfa
/
Proteína Quinase Tipo I Dependente de AMP Cíclico
/
Gliadina
Tipo de estudo:
Estudo prognóstico
Limite:
Humanos
Idioma:
Inglês
Revista:
J. physiol. biochem
Ano de publicação:
2010
Tipo de documento:
Artigo
Instituição/País de afiliação:
Instituto de Agroquímica y Tecnología de Alimentos (CSIC)/Spain