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T-kininogen inhibits kinin-mediated activation of ERK in endothelial cells Biol. Res.
LEIVA-SALCEDO,ELIAS; PEREZ,VIVIANA; ACUÑA-CASTILLO,CLAUDIO; WALTER,ROBIN; SIERRA,FELIPE.
Serum levels of T-kininogen increase dramatically as rats approach the end of their lifespan. Stable expression of the protein in Balb/c 3T3 fibroblasts leads to a dramatic inhibition of cell proliferation, as well as inhibition of the ERK signaling pathway. T-kininogen is a potent inhibitor of cysteine proteinases, and we have described that the inhibition of ERK activity occurs, at least in part, via stabilization of the MAP kinase phosphatase, MKP-1. Since fibroblasts are not a physiological target of T-kininogen, we have now purified the protein from rat serum, and used it to assess the effect of T-kininogen on endothelial cells. Adding purified T-kininogen to EAhy 926 hybridoma cells resulted in inhibition of basal ERK activity levels, as estimated...
Tipo: Journal article Palavras-chave: Aging; Endothelial cells; ERK pathway; Kininogen; Kinins.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000200020
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