The emerging multifaceted roles of nitric oxide

Area of Science:

• Biochemistry
• Physiology
• Pharmacology

Background:

• Nitric oxide (NO) is a reactive free radical with critical regulatory functions across multiple organ systems, including cardiovascular, pulmonary, gastrointestinal, immune, and central nervous systems.
• Dysregulation of NO synthesis is implicated in various pathophysiologic conditions, such as atherosclerosis, pulmonary hypertension, pyloric stenosis, and renal failure-induced hypertension.

Purpose of the Study:

• To provide the surgical community with a fundamental understanding of nitric oxide (NO) biochemistry and physiology.
• To highlight the role of NO in both normal homeostasis and disease states.
• To inform the use of novel pharmacologic NO therapies for NO-deficient conditions.

Main Methods:

• This review synthesizes existing research on nitric oxide (NO) biochemistry and physiology.
• It examines the role of NO in various organ systems and pathophysiologic states.
• It discusses traditional NO donors and novel pharmacologic NO adducts.

Main Results:

• NO plays a significant role in cardiovascular, pulmonary, gastrointestinal, immune, and central nervous systems.
• Impaired NO synthesis is central to diseases including atherosclerosis and pulmonary hypertension.
• Exogenous NO sources, like sodium nitroprusside and S-nitrosothiols, offer potential therapeutic strategies.

Conclusions:

• A comprehensive understanding of NO's functions is essential for surgical professionals.
• Knowledge of NO biochemistry and physiology aids in comprehending disease mechanisms.
• Pharmacologic NO therapies hold promise for treating NO-deficient pathologic states.