Related Experiment Videos
Do human atherosclerotic lesions contain nitrotyrosine?
P Evans1, H Kaur, M J Mitchinson
1International Antioxidant Research Centre, King's College, London, United Kingdom.
Biochemical and Biophysical Research Communications
|September 13, 1996
Summary
Nitrotyrosine, a marker for peroxynitrite, was rarely found in normal or diseased human aorta tissues. This suggests peroxynitrite may play a lesser role in atherosclerosis initiation than previously thought.
Area of Science:
- Biomedical research
- Cardiovascular pathology
- Biomarker analysis
Background:
- Nitrotyrosine is a widely recognized marker for peroxynitrite formation in biological tissues.
- Peroxynitrite has been implicated as a significant factor in the development of atherosclerosis.
Purpose of the Study:
- To investigate the presence and significance of nitrotyrosine in normal human aortic intima and atherosclerotic lesions.
- To reassess the role of peroxynitrite in the initiation of atherosclerosis based on nitrotyrosine detection.
Main Methods:
- Utilized High-Performance Liquid Chromatography (HPLC) with photodiode array detection to detect nitrotyrosine.
- Employed Western blotting techniques for nitrotyrosine identification.
- Analyzed specimens from normal human aortic intima and atherosclerotic lesions at various developmental stages.
Main Results:
- Nitrotyrosine was detected in only a very small number of both normal and diseased aortic specimens.
- The employed analytical methods (HPLC, Western blotting) successfully identified nitrotyrosine when tissues were chemically nitrated, validating the techniques.
Conclusions:
- The limited presence of nitrotyrosine in human aortic tissues suggests that peroxynitrite may not be as crucial in the initiation of atherosclerosis as commonly proposed.
- Further research is needed to fully elucidate the role of peroxynitrite and other reactive nitrogen species in cardiovascular disease pathogenesis.