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[Nitric oxide, from vascular physiology to therapeutics]
S Adnot1, S Eddahibi, P Mauran
1Département de physiologie, hôpital Henri-Mondor, Créteil.
Archives Des Maladies Du Coeur Et Des Vaisseaux
|December 1, 1994
Summary
Nitric oxide (NO) is vital for vascular tone, synthesized by endothelial cells. Reduced NO synthesis in diseases like hypertension impairs vasodilation, impacting cardiovascular health.
Area of Science:
- Cardiovascular Physiology
- Endothelial Function
Context:
- Nitric oxide (NO) produced by endothelial cells regulates vascular tone.
- NO synthesis depends on L-arginine and NO-synthase activity, modulated by calcium levels and physical factors.
- Endothelial NO stimulates soluble guanylate-cyclase, increasing cyclic GMP and causing vasodilation.
Purpose:
- To review the role of nitric oxide (NO) in vascular tone regulation.
- To discuss the implications of impaired NO synthesis in various pathological conditions.
- To explore therapeutic strategies involving NO.
Summary:
- Endothelial nitric oxide (NO) is crucial for maintaining vascular tone via vasodilation.
- Decreased NO synthesis is observed in hypercholesterolemia, atherosclerosis, and hypertension.
- The precise role of NO deficiency as a cause or consequence in disease requires further investigation.
Impact:
- Reduced NO-mediated vasodilation is significant in cardiovascular diseases.
- NO's properties (vasorelaxation, antiplatelet, antiproliferative) highlight its importance.
- Therapeutic approaches include nitrate derivatives and NO inhalation, particularly for pulmonary hypertension.