Increased myocardial N-myristoyltransferase activity in rotenone model of Parkinsonism
Bibliographic record
Abstract
There is widespread brain pathology in Parkinson's disease (PD), with the primary pathology in the substantia nigra. Oxidative stress is believed to play a role in cell death in PD. Rotenone is a mitochondrial toxin which can produce Parkinson syndrome (PS) in rats. Myristoyl-CoA:protein N-myristoyltransferase (NMT), which catalyzes the co-translational transfer of myristate from myristoyl-CoA to the amino-terminal glycine residue of selected polypeptides, is increased in the myocardium of ischemia-reperfusion rat model myocardium. Animals received rotoneone (n=10) or placebo vehicle (n=6) via Alzet osmotic pumps. Mean cardiac muscle NMT activity of placebo treated (control) rats was 0.608+/-0.366 units/mg protein. Rats with mild or no detectable PS features on rotenone showed slight (mean 0.853+/-0.192) but insignificantly increased activity. Rats that had moderately severe PS features had higher level of NMT activity (mean 1.223+/-0.057), which was borderline significant compared to controls (P=0.066). Rats with severe PS features had the highest NMT activity (1.353+/-0.128) which was significantly greater compared to controls (P=0.003) and to the rats that had equivocal or no motor slowing (P=0.005). Our data show cardiac metabolic dysfunction in a rotenone rat model of PS. The severity of this change correlates with the severity of motor manifestations. Further studies of NMT activity in human PD cases and patients with cardiomyopathy of unknown cause may provide valuable information in these disorders.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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 | 0.000 |
| 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".