METABOLISM IN HUMAN OXIDATIVE PHENOTYPES AND THEIR RAT MODELS
Bibliographic record
Abstract
Methoxyphenamine (MP), which is a ß2 agonist used clinically as a bronchodilator, is marketed in Canada in the combination non-prescription product, Orthoxicol™. It has been shown to be metabolized by three phase I metabolic pathways, namely, N-demethylation (NDMP), 0-demethylation (0DMP) and aromatic 5-hydroxylation (5HMP). Genetic polymorphism in the metabolism of MP and its relationship to debrisoquine (D) oxidation to 4-41ydroxy-debrisoquine (4HD) were investigated inhuman as well as rat models of human debrisoquine phenotypes. Such a study enabled investigation of the effects on the alternative metabolic pathways when one or more metabolic reaction of MP are genetically impaired. \nIn order to perform the above studies, quantitative gas-liquid chranatographic (GLC) procedures for MP and three of its metabolites in biological fluids were developed. The metabolites in plasma were \nmeasured using an electron-capture detector (ECU). The lower limit of quantitation for each metabolite was less than 4 ng m1-1 of plasma, with a coefficient of variation less than 10% in each case. The poor electron-capture response of fluorinated derivatives of MP necessitated the use of nitrogen-phosphorous detection (NPD). Extractive derivatization with pentafluorcbenzoyl chloride, without the need for protein precipitation, enabled quantitation of MP down to 3.8 ng ml-1 \nfrom a 2-mi aliquot of plasma. The urinary concentration of MP and its three metabolites were determined simultaneously after derivatization with trifluoroacetic anhydride by a modified literature procedure which employed GLC-NPD.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".