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Biol Pharm Bull ; 42(7): 1179-1184, 2019 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-30982787

RESUMO

The effect of seleno-L-methionine (SeMet) on immunoglobulin (Ig) E-mediated allergic responses were investigated using rat basophilic leukemia RBL-2H3 cells. Cells were first treated with or without SeMet, sensitized with anti-dinitrophenyl IgE and stimulated with the antigen dinitrophenyl-human serum albumin, before the measurement of degranulation, calcium mobilization, mRNA expression and protein secretion of interleukin (IL)-4 and tumor necrosis factor (TNF)-α, and phosphorylation of spleen tyrosine kinase (Syk), Akt, and mitogen-activated protein kinases (MAPKs). The antigen-induced ß-hexosaminidase release, a degranulation marker, was significantly inhibited by SeMet treatment. SeMet also significantly suppressed antigen-induced calcium mobilization. Antigen-induced increases in the mRNA expression and protein secretion of IL-4 and TNF-α were both significantly attenuated by SeMet treatment. In addition, SeMet significantly suppressed antigen-induced phosphorylation of Syk, Akt, and MAPKs. These results demonstrate that SeMet suppresses antigen-induced degranulation, and mRNA expression and protein secretion of IL-4 and TNF-α, and inhibits antigen-induced mobilization of calcium and activation of Syk, Akt, and MAPKs. Our study provides valuable information that may be useful in the prevention and treatment of allergic diseases.


Assuntos
Hipersensibilidade/imunologia , Imunoglobulina E/imunologia , Metionina/análogos & derivados , Metionina/farmacologia , Compostos de Selênio/farmacologia , Animais , Cálcio/imunologia , Linhagem Celular Tumoral , Interleucina-4/imunologia , Ratos , Fator de Necrose Tumoral alfa/imunologia , beta-N-Acetil-Hexosaminidases/imunologia
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