Oxyradicals as a mechanism of acetylcholine-induced vascular relaxation
Bibliographic record
Abstract
Acetylcholine (Ach)-induced vascular relaxation is accepted to be mediated by nitric oxide (NO·), endothelium-derived hyperpolarizing factor (EDHF), and prostaglandins released from endothelium. NO· activates guanylate cyclase which converts guanosine triphosphate to cyclic guanosine monophosphate (cGMP) that produces vascular relaxation. However there is some evidence which suggests that Ach-induced vascular relaxation may be mediated by hydroxyl radicals (·OH). NO· reacts rapidly with superoxide anion (O − 2 ) in a radical-radical coupled interaction to generate peroxynitrite anion which at physiological pH gets converted to peroxynitrous acid. Peroxynitrous acid is very unstable and rapidly decomposes to yield ·OH. There are numerous supporting evidences which suggest that Ach-induced vascular relaxation is mediated by ·OH. Ach and ·OH produce concentration-dependent vascular relaxation. Superoxide dismutase (SOD), a scavenger of O − 2 , and mannitol and dimethylthiourea, scavengers of ·OH, reduce the Ach-induced vascular relaxation. N G monomethyl-L-arginine, an inhibitor of NO· synthase, inhibits endothelium-dependent vascular relaxation to Ach. ·OH also stimulates guanylate cyclase similar to NO·. ·OH-induced vascular relaxation may also be mediated by cyclooxygenase and EDHF. In conclusion, these data suggest that Ach-induced vascular relaxation may be mediated by ·OH generated from interaction of O − 2 and NO·.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".