Glutamate decreases oxidative stress and lipid droplet formation in astrocytes
Bibliographic record
Abstract
Astrocytes degrade fatty acids in response to glutamate while reducing the abundance of lipid droplets. But how glutamate regulates lipid droplets in astrocytes is unclear. Here, we used primary rat astrocytes to show that glutamate decreases the amount of reactive oxygen species, which, in turn, reduces autophagy and the amount of lipids in need of storage in lipid droplets. This decrease in lipid droplets and reactive oxygen species occurs independently of glutamate import through excitatory amino acid transporters (EAATs). However, activation of AMPK, downstream of EAATs, further promotes a decrease in lipid droplets. Glutamate also increases the pool of fused mitochondria capable of maintaining enhanced fatty acid metabolism. Our work reveals how astrocytic metabolism is regulated by glutamate, which can serve to coordinate astrocyte physiology with neuronal activity.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 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 | 0.000 |
| 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".