Interleukin-4 stimulates cGMP production by IFN-gamma-activated human monocytes. Involvement of the nitric oxide synthase pathway.
J Biol Chem
; 269(13): 9811-6, 1994 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-7511593
ABSTRACT
Resting human blood monocytes from some donors were found to produce a small amount of 3'-5' guanine cyclic monophosphate (cGMP) in response to interleukin 4 (IL-4). A much higher response was observed when monocytes were preincubated with interferon (IFN-gamma), which alone was ineffective. Preincubation of monocytes with IL-4 led, in contrast, to their subsequent incapacity to generate cGMP in response to IL-4. The accumulation of cGMP induced by IL-4 in IFN-gamma preincubated monocytes was dose-dependent and peaked about 15 min after its addition. It was inhibited in the presence of NG-mono-methyl-L-arginine (L-NMMA), an inhibitor of the nitric oxide synthase pathway. This suppressive effect of L-NMMA was reverted by an excess of L- but not of D-arginine. Accumulation of cGMP was significantly reduced by addition of soluble guanylyl cyclase inhibitors, such as LY83583 [correction of LY83853] and methylene blue, but was not impaired in the presence of EGTA, suggesting that the pathway involved is calcium independent. In addition, IL-4 induced an increased secretion of nitrite by monocytes, that was potentiated by IFN-gamma and inhibited by L-NMMA. Taken together, these results suggest that the sequential exposure of monocytes to IFN-gamma and IL-4 elicits the release of NO from L-arginine, which in turn is capable to stimulate soluble guanylyl cyclase.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arginina
/
Leucocitos Mononucleares
/
Interleucina-4
/
Interferón gamma
/
GMP Cíclico
/
Aminoácido Oxidorreductasas
Límite:
Humans
Idioma:
En
Revista:
J Biol Chem
Año:
1994
Tipo del documento:
Article
País de afiliación:
Francia