Investigation of Structure and Function of Thin Films of Nitric Oxide Synthase and Polyethylenimine Formed Using the Layer-by-Layer Deposition Method

Stroke ◽  
1995 ◽  
Vol 26 (10) ◽  
pp. 1922-1929 ◽  
Author(s):  
Pierre Moreau ◽  
Hiroyuki Takase ◽  
Christoph F. Küng ◽  
Menno-M. van Rooijen ◽  
Thomas Schaffner ◽  
...  

2007 ◽  
Vol 292 (5) ◽  
pp. H2138-H2143 ◽  
Author(s):  
Danijel Juric ◽  
Peter Wojciechowski ◽  
Dipak K. Das ◽  
Thomas Netticadan

This study was designed to examine the effects of the antioxidant resveratrol on cardiac structure and function in pressure overload (PO)-induced cardiac hypertrophy. Male Sprague-Dawley rats were subjected to sham operation and the aortic banding procedure. A subgroup of sham control and aortic-banded rats were treated with resveratrol for 2 wk after surgery. Echocardiographic analysis of cardiac structure and function along with Western blot analysis of endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), and redox factor-1 (ref-1) were performed in all groups after 4 wk of surgery. Banded rats showed significantly increased left ventricle-to-body weight ratio. Echocardiographic analysis showed that the interventricular septal wall thickness and left ventricular posterior wall thickness at systole and diastole were significantly increased in banded rats. Also, a significant increase in isovolumic relaxation time was observed in banded rats. Measured eNOS, iNOS, and ref-1 protein levels were significantly reduced in banded rats. Resveratrol treatment prevented the above changes in cardiac structure, function, and protein expression in banded rats. Aortic banding after 4 wk resulted in concentric remodeling and impaired contractile function due to PO on the heart. The 2-wk treatment with resveratrol was found to abolish PO-induced cardiac hypertrophy. Resveratrol may therefore be beneficial against PO-induced cardiac hypertrophy found in clinical settings of hypertension and aortic valve stenosis.


2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Heather J. Montgomery ◽  
Andrea L. Dupont ◽  
Hilary E. Leivo ◽  
J. Guy Guillemette

The nitric oxide synthase-like protein fromBacillus cereus(bcNOS) has been cloned, expressed, and characterized. This small hemeprotein (356 amino acids in length) has a mass of 43 kDa and forms a dimer. The recombinant protein showed similar spectral shifts to the mammalian NOS proteins and could bind the substrates L-arginine andNG-hydroxy-L-arginine as well as the ligand imidazole. Low levels of activity were recorded for the hydrogen peroxide-dependent oxidation ofNG-hydroxy-L-arginine and L-arginine by bcNOS, while a reconstituted system with the rat neuronal NOS reductase domain showed no activity. The recombinant bcNOS protein adds to the complement of bacterial NOS-like proteins that are used for the investigation of the mechanism and function of NO in microorganisms.


2002 ◽  
Vol 70 (8) ◽  
pp. 4638-4642 ◽  
Author(s):  
Muna Qadoumi ◽  
Inge Becker ◽  
Norbert Donhauser ◽  
Martin Röllinghoff ◽  
Christian Bogdan

ABSTRACT Cytokine-inducible (or type 2) nitric oxide synthase (iNOS) is indispensable for the resolution of Leishmania major or Leishmania donovani infections in mice. In contrast, little is known about the expression and function of iNOS in human leishmaniasis. Here, we show by immunohistological analysis of skin biopsies from Mexican patients with local (LCL) or diffuse (DCL) cutaneous leishmaniasis that the expression of iNOS was most prominent in LCL lesions with small numbers of parasites whereas lesions with a high parasite burden (LCL or DCL) contained considerably fewer iNOS-positive cells. This is the first study to suggest an antileishmanial function of iNOS in human Leishmania infections in vivo.


1997 ◽  
Vol 80 (3) ◽  
pp. 327-335 ◽  
Author(s):  
Alex F.Y. Chen ◽  
Timothy O’Brien ◽  
Masato Tsutsui ◽  
Hiroyuki Kinoshita ◽  
Vincent J. Pompili ◽  
...  

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