HIV-1 induced decrease of nitric oxide production and inducible nitric oxide synthase expression during in vivo and in vitro infection

2008 ◽  
Vol 127 (1) ◽  
pp. 26-33 ◽  
Author(s):  
Ernesto Cairoli ◽  
Daniel Scott-Algara ◽  
Otto Pritsch ◽  
Guillermo Dighiero ◽  
Alfonso Cayota
1995 ◽  
Vol 181 (1) ◽  
pp. 63-70 ◽  
Author(s):  
N K Worrall ◽  
W D Lazenby ◽  
T P Misko ◽  
T S Lin ◽  
C P Rodi ◽  
...  

The role of nitric oxide in the immune response to allogeneic tissue was explored in an in vivo cardiac transplant model in the rat. Nitric oxide production during organ rejection was demonstrated by elevations in systemic serum nitrite/nitrate levels and by electron paramagnetic resonance spectroscopy. Messenger RNA for the inducible nitric oxide synthase enzyme was detected in the rejecting allografted heart, but not in the nonrejecting isografted heart. The enzyme was demonstrated to be biologically active by the in vitro conversion of L-arginine to L-citrulline and was immunohistochemically localized to the infiltrating inflammatory cells. Treatment with aminoguanidine, a preferential inhibitor of the inducible nitric oxide synthase isoform, prevented the increased nitric oxide production in the transplanted organ and significantly attenuated the pathogenesis of acute rejection. Aminoguanidine treatment prolonged graft survival, improved graft contractile function, and significantly reduced the histologic grade of rejection. These results suggest an important role for nitric oxide in mediating the immune response to allogeneic tissue. Inhibition of inducible nitric oxide synthase may provide a novel therapeutic modality in the management of acute transplant rejection and of other immune-mediated processes.


Nitric Oxide ◽  
2001 ◽  
Vol 5 (4) ◽  
pp. 349-360 ◽  
Author(s):  
Stefania Bergamini ◽  
Cristina Rota ◽  
Raffaella Canali ◽  
Mariagrazia Staffieri ◽  
Francesca Daneri ◽  
...  

1996 ◽  
Vol 108 (supplement) ◽  
pp. 115-120
Author(s):  
Yoshihisa KITAMURA ◽  
Hideaki TAKAHASHI ◽  
Yasuji MATSUOKA ◽  
Yasuyuki NOMURA ◽  
Takashi TANIGUCHI

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