Pharmacological Effects of Peptides on Tracheal Smooth Muscle
Bibliographic record
Abstract
Peptide and non-peptide agents were tested for their stimulatory or inhibitory effects on circular strips of guinea pig isolated tracheae. Substance P, eledoisin, physalaemin, neurotensin, angiotensin, histamine and carbachol were found to contract, while noradrenaline, dopamine, bradykinin, nucleotides (AMP, ADP, ATP) and prostaglandins (PGE1, PGE2, PGA2) induced concentration-dependent relaxations of tracheae contracted with substance P or carbachol. Indomethacin (2.8 X 10(-6) M) significantly potentiated the effect of substance P and blocked that of bradykinin. The contractions to substance P of tissues treated with indomethacin were not modified by atropine, methysergide, diphenhydramine, cimetidine, propranolol, phentolamine, [Leu8]-ATII, [Leu8]-des-Arg9-bradykinin, naloxone and baclofen. The order of potency of C-terminal fragments of substance P was: hexa(6-11) greater than hepta(5-11) greater than substance P greater than = octa(4-11). It is concluded that the guinea pig isolated trachea is a pharmacological preparation sensitive to numerous agents and useful for studying structure-activity relationship and the mechanism of cellular action of several peptides, particularly substance P.
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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 | 0.000 |
| 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 | 0.001 |
| 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".