Semax prevents the death of tyrosine hydroxylase-positive neurons in a mixed neuroglial cell culture derived from the embryonic rat mesencephalon in a model of 6-hydroxydopamine-induced neurotoxicity
Bibliographic record
Abstract
The peptide Semax (MEHFPGP), which is an analogue of the ACTH (4–10) fragment, has a wide spectrum of activity in the nervous system of mammals, including humans. Using a model of neurotoxicity induced by hydroxydopamine, we studied the ability of Semax to prevent the death of tyrosine hydroxylase-positive neurons in a primary mixed neuroglial cell culture derived from the mesencephalon of rat embryos. We found that the application of 6-hydroxydopamine at concentrations of 2 and 5 µM to the culture medium induced a dose-dependent loss of tyrosine hydroxylase-positive neurons by 25 and 65%, respectively. The application of Semax at a concentration of 0.1 µM 30 min prior to treatment with 5 µM 6-hydroxydopamine significantly increased the number of tyrosine hydroxylase-positive neurons by 30–40%. Addition of Semax to cell cultures 24 h prior to the neurotoxin did not reveal the protective effect of the peptide. These data show that Semax may potentially be used for the treatment of some neurodegenerative diseases that are associated with a loss of dopaminergic neurons in 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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| 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".