Interleukin-1 alpha, interleukin 6 and tumor necrosis factor alpha increase the synthesis and expression of the functional alternative and terminal complement pathways by human umbilical vein endothelial cells in vitro.
APMIS
; 104(3): 213-9, 1996 Mar.
Article
em En
| MEDLINE
| ID: mdl-8611196
ABSTRACT
The proinflammatory cytokines interleukin 1 alpha (IL-1 alpha), tumor necrosis factor alpha (TNF alpha) and interleukin 6 (IL-6) modulate the synthesis of complement factors B and C3 by endothelial cells (EC), and are considered to play an important role in the development of sepsis. By using agarose beads activating the alternative pathway of complement, we wanted to study the net effect of these cytokines on EC synthesis of the alternative and terminal pathways, measured by binding of anti-C3c and anti-TCC (terminal complement complex) antibodies to beads kept with the EC. Addition of IL-1 alpha and TNF alpha at concentrations of 50 and 100 U/ml resulted in a significant increase in binding of these antibodies to co-incubated beads, most pronounced for anti-C3c. IL-6 from 50-200 U/ml resulted in a stronger (two to fourfold) binding for both antibodies compared to experiments with IL-1 alpha and TNF. However, increased concentrations of IL-1 alpha (200 U/ml) and IL-6 (400 U/ml) resulted in a strong reduction in binding of anti-C3c and anti-TCC antibodies to the co-cultured beads. This study indicates that proinflammatory cytokines upregulate the synthesis by EC of the functional alternative and terminal pathways of complement.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Complemento C3
/
Endotélio Vascular
/
Fator B do Complemento
/
Complexo de Ataque à Membrana do Sistema Complemento
/
Regulação da Expressão Gênica
/
Interleucina-6
/
Interleucina-1
/
Fator de Necrose Tumoral alfa
Limite:
Humans
Idioma:
En
Revista:
APMIS
Assunto da revista:
ALERGIA E IMUNOLOGIA
/
MICROBIOLOGIA
/
PATOLOGIA
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Noruega