Biophysical Characterization and Preformulation Studies of Human Mesencephalic Astrocyte-Derived Neurotropic Factor
Bibliographic record
Abstract
A novel neurotrophic factor, human mesencephalic astrocyte-derived neurotrophic factor (hMANF), is being considered a therapeutic agent for a variety of diseases. However, little, if anything, has been reported about its stability. A preformulation study was conducted to assess the stability of hMANF as a function of pH and temperature. In addition, the effects of buffers and other excipients were evaluated as well. While the chemical and physical stability of hMANF decreases near pH 4, overall, the protein appears to be quite stable, especially near pH 6. Both histidine and phosphate appear to be suitable buffers in this pH range. Some loss of stability was noted above pH 6.5 as well. The stability profile of hMANF was comparable at 1 and 10 mg/mL. The decreased stability at acidic pH is correlated with the loss of the native α-helical conformation, as shown by FTIR spectroscopy. These studies indicate that hMANF is quite stable near pH 6, and formulations capable of exhibiting adequate long-term stability in aqueous solutions should be possible.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| 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".