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Comparative Study
. 1996 May 1;183(5):2337-42.
doi: 10.1084/jem.183.5.2337.

Spontaneously increased production of nitric oxide and aberrant expression of the inducible nitric oxide synthase in vivo in the transforming growth factor beta 1 null mouse

Y Vodovotz  1 , A G Geiser, L Chesler, J J Letterio, A Campbell, M S Lucia, M B Sporn, A B Roberts
Affiliations
Comparative Study

Spontaneously increased production of nitric oxide and aberrant expression of the inducible nitric oxide synthase in vivo in the transforming growth factor beta 1 null mouse

Y Vodovotz et al. J Exp Med. .

Abstract

Transforming growth factor beta 1 null mice (TGF-beta 1-/-) suffer from multifocal inflammation and die by 3-4 wk of age. In these mice, levels of nitric oxide (NO) reaction products in serum are elevated approximately fourfold over levels in controls, peaking at 15-17 d of life. Shortterm treatment of TGF-beta 1-/- mice with NG-monomethyl-L-arginine suppressed this elevated production of NO. Expression of inducible NO synthase (iNOS) mRNA and protein is increased in the kidney and heart of TGF-beta 1-/- mice. These findings demonstrate that TGF-beta 1 negatively regulates iNOS expression in vivo, as had been inferred from mechanistic studies on the control of iNOS expression by TGF-beta 1 in vitro.

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