abstract background: nitric oxide (no) is a molecule that incorporates in many physiological processes of female reproductive system. recent studies suggested the possible role of endothelial isoform of nitric oxide synthase (enos) enzyme in female infertility. objective: the aim of this study is to evaluate the expression of endothelial nitric oxide synthase in endometrial tissue of women with...

The objective of this study was to determine whether nitric oxide (NO) could function as a negative feedback modulator of endothelial cell function by inhibiting NO synthase in vascular endothelial cells. The rationale for this approach was a previous study from this laboratory, which revealed that NO inhibits neuronal NO synthase from rat cerebellum. In the present study, NO and NO-donor agent...

nitric oxide is an important vasorelaxant factor that it inhibits platelet adhesion and proliferation of smooth muscle cells. no is synthesized from l-arginine by means of endothelial nitric oxide synthase (enos) which is an isoform of  nitric oxide synthase.in the present study, we examined  possible association between the 27 base pair (bp) repeat  polymorphism in intron 4 of the  enos3 gene ...

Brain nitric oxide (NO) synthase showed pyridine haemochrome spectra typical of ferroprotoporphyrin IX-containing enzymes. The haem content of purified NO synthase was in the range 0.7-0.9 mol/mol of 160 kDa subunit. In the presence of CO, NO, KCN and miconazole, the L-citrulline-forming activity of NO synthase was markedly diminished, demonstrating that enzyme-bound haem is involved in enzymic...

  The involvement of nitric oxide (NO) in the reinforcing properties of opiate reward was studied by examining the effect of a NO precursor (L-arginine) and a NO synthase inhibitor (L-NAME) on the rate of intravenous self-administration of morphine. This experiment was investigated in male albino Sprague Dawley rats (300 ± 50 g). At doses of 5 and 10 mg/kg (i.p.), L-arginine decreased morphine ...