Vascular system: role of nitric oxide in cardiovascular diseases.
Level 5 - mechanism / opinion, no new human data
Narrative review describing physiological and pathological mechanisms of nitric oxide signaling.
PubMed 18401228 · doi:10.1111/j.1751-7176.2008.06632.x
What was done
This is a narrative review summarizing the history, physiological functions, and pathological roles of nitric oxide (NO) in cardiovascular and inflammatory diseases. It outlines the signaling pathways utilized by NO, distinguishing between low-concentration cyclic guanosine monophosphate (cGMP)-dependent signaling and high-concentration cGMP-independent pathways.
What was found
The abstract reports no empirical numbers or clinical statistics. It notes that brief production of NO at low nanomolar concentrations mediates smooth muscle relaxation, platelet aggregation inhibition, and neurotransmission through cGMP-dependent signaling. In contrast, sustained production of NO at higher concentrations interacts directly with target proteins via reactive nitrogen species independently of cGMP, playing roles in inflammatory and degenerative conditions such as arthritis, myocarditis, colitis, nephritis, cancer, diabetes, and neurodegenerative diseases.
Why it matters
It provides a foundational overview of the dual concentration-dependent mechanisms of nitric oxide in maintaining normal vascular tone versus driving pathological inflammation.
Limits
This is an unstructured narrative review that provides no new empirical data, quantitative effect estimates, clinical outcomes, or systematic methodology.
Cited by
- supports The discovery of nitric oxide's biological signaling mechanisms won the Nobel Prize for Physiology or Medicine.