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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 |
| 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 source (direct Gemma or distilled Codex), 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".