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[Nitric oxide: from endogenous vasodilator to biologic mediator]
J R Berrazueta1, P López-Jaramillo, S Moncada
1Universidad de Cantabria, Hospital Nacional Marqués de Valdecilla, Santander.
Revista Espanola De Cardiologia
|August 1, 1990
Summary
Nitric oxide (NO), synthesized from L-arginine, is a key regulator of vascular tone and blood flow. Dysregulation of NO is implicated in cardiovascular diseases like hypertension and atherosclerosis.
Area of Science:
- Biochemistry
- Physiology
- Pharmacology
Context:
- Nitric oxide (NO) is synthesized from the amino acid L-arginine.
- Endothelial NO plays a critical role in regulating vascular tone, blood flow, and arterial pressure.
- NO's cardiovascular effects are mimicked by nitrovasodilators like nitroglycerin.
Purpose:
- To review current knowledge on the physiological roles of nitric oxide.
- To explore the involvement of NO dysregulation in cardiovascular pathophysiology.
- To discuss the broader biological functions and evolutionary significance of NO.
Summary:
- Endothelial nitric oxide (NO) stimulates guanylate cyclase in vascular smooth muscle, acting as an endogenous nitrovasodilator.
- Impaired NO synthesis or release may contribute to hypertension, vasospasm, and atherosclerosis.
- NO is also synthesized in various cells (macrophages, CNS, liver, etc.), influencing inflammation, cancer, and other conditions.
Impact:
- Understanding NO's roles provides insights into cardiovascular disease mechanisms.
- NO's involvement in diverse cellular processes highlights its significance in multiple pathologies.
- The discovery of NO suggests a fundamental, evolutionarily conserved signaling pathway involving guanylate cyclase activation.