Effect of Oral Melatonin Administration on Melatonin, 5-Hydroxyindoleacetic Acid, Indoleacetic Acid, and Cyclic Nucleotides in Human Cerebrospinal Fluid
Bibliographic record
Abstract
Melatonin was given orally to patients undergoing diagnostic pneumoencephalography and various compounds were measured in the lumbar and cisternal CSF. Melatonin markedly increased plasma and CSF melatonin concentrations. The plasma: CSF melatonin ratios were similar in patients who received, and in those who did not receive, melatonin. This supports the idea that melatonin is released from pineal to blood and gets into the CSF via the blood. Melatonin did not affect CSF 5-hydroxyindoleacetic acid, which indicates that it has no effect on 5-hydroxytryptamine metabolism. Melatonin increased CSF indoleacetic acid significantly, indicating increased metabolism of tryptamine. Melatonin did not affect CSF cAMP levels, but increased cGMP levels. The effect on indoleacetic acid and cGMP was seen in both lumbar and cisternal CSF, suggesting that melatonin can have generalized actions throughout the CNS.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".