Related Experiment Videos
Nitric oxide indices in human septic shock
O A Strand1, A Leone, K E Giercksky
1Department of Infectious Diseases, Ullevål University Hospital, Oslo, Norway. oystrand@hotmail.com
Critical Care Medicine
|August 31, 2000
Summary
In septic shock, elevated nitrite, nitrate (NOx), and nitrotyrosine (NT) indicate increased reactive nitrogen species. Measuring both NOx and NT offers a more accurate assessment of nitric oxide production than NOx alone.
Area of Science:
- Biochemistry
- Critical Care Medicine
- Physiology
Background:
- Septic shock is a life-threatening condition characterized by circulatory dysfunction.
- Nitric oxide (NO) plays a complex role in septic shock, and its accurate measurement is crucial.
- Existing markers for NO production may not fully capture its dynamics in sepsis.
Purpose of the Study:
- To investigate the relationship between nitrite, nitrate (NOx), nitrotyrosine (NT), and nitrosothiols as indicators of NO production in human septic shock.
- To determine if NOx and NT levels can provide a more comprehensive understanding of NO metabolism during sepsis.
Main Methods:
- A prospective clinical study was conducted in intensive care units.
- Sixteen patients with septic shock and nine healthy volunteers were enrolled.
- Plasma levels of NOx, NT, and nitrosothiols were measured and analyzed.
Main Results:
- Patients with septic shock exhibited elevated peak plasma concentrations of NOx and NT compared to controls.
- Peak NT levels did not always coincide with peak NOx levels, and NT was elevated even when NOx levels were normal.
- Plasma concentrations of nitrosothiols remained unchanged throughout the study in septic shock patients.
Conclusions:
- Elevated plasma NOx and NT suggest increased reactive nitrogen species formation in septic shock.
- Measuring both NT and NOx may provide a more accurate assessment of NO production in septic shock than NOx alone.
- Nitrosothiols do not appear to be reliable markers of NO production in this context.