Phenolic constituents isolated from Fragaria ananassa Duch. inhibit antigen-stimulated degranulation through direct inhibition of spleen tyrosine kinase activation.
Bioorg Med Chem
; 18(16): 5932-7, 2010 Aug 15.
Article
en En
| MEDLINE
| ID: mdl-20663674
ABSTRACT
We isolated eight phenolic constituents from Fragaria ananassa Duch. (strawberry) and determined their structures using 1D, 2D-NMR. Among the isolated compounds, linocinnamarin (LN), 1-O-trans-cinnamoyl-beta-d-glucopyranose (CG), and cinnamic acid (CA) exhibited antigen (Ag)-stimulated degranulation in rat basophilic leukemia RBL-2H3 cells. In order to reveal the underlying mechanisms, we examined the effects of LN and CA on cellular responses induced by antigen stimulation. Treatment with both LN and CA markedly inhibited antigen-stimulated elevation of intracellular free Ca(2+) concentration and reactive oxygen species (ROS). Both LN and CA suppressed Ag-stimulated spleen tyrosine kinase (Syk) activation. These results indicate that inhibition of antigen-stimulated degranulation by LN and CA is mainly due to inactivation of Syk/phospholipase Cgamma (PLCgamma) pathways. Our findings suggest that LN and CA isolated from F. ananassa Duch. (strawberry) could be beneficial agents for alleviating symptoms of type I allergy.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Fenoles
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Basófilos
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Proteínas Tirosina Quinasas
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Degranulación de la Célula
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Antialérgicos
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Fragaria
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Péptidos y Proteínas de Señalización Intracelular
Límite:
Animals
Idioma:
En
Revista:
Bioorg Med Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Japón