Zinc Deficiency Exacerbates Loss in Blood‐Brain Barrier Integrity Induced by Hyperoxia Measured by Dynamic MRI
Bibliographic record
Abstract
Abstract. Using dynamic Magnetic Resonance Imaging (dMRI), blood‐brain barrier (BBB) permeability ( k PSρ ) and tissue interstitial leakage space ( v e ) were evaluated in zinc‐deficient (ZnDF) male weanling Wistar rats following 3 days exposure to hyperoxia (85% O 2 ). Temporal monitoring of T1‐weighted MR image changes, following a bolus intravenous injection of gadolinium‐DTPA, allowed estimation of BBB integrity. Three‐day exposure of hyperoxia caused a marginal loss of BBB integrity, reflected in a slight increase in k PSρ and v e , observed in both the animals fed adequate zinc (ZnAL) and pair‐fed controls (ZnPF). However, zinc deficiency resulted in a significant increase in both k PSρ and v e , indicating a severely disturbed BBB. In addition MR‐visible free water was elevated in ZnDF brains following hyperoxia treatment indicating that a loss of BBB integrity may be associated with neuronal edema. The diminished BBB integrity may be free‐radical mediated as the ratio of oxidized to reduced glutathione (GSSG:GSH) was significantly elevated.
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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 | 0.001 | 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 | 0.001 |
| 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".