Differential regulation of epithelial sodium channel subunits in the brain by sodium rich aCSF
Bibliographic record
Abstract
All three subunits of the epithelial sodium channel (ENaC) are expressed in the brain. Blockade of ENaC in the brain by benzamil prevents sympathetic hyperactivity and hypertension in salt sensitive rats and following intracerebroventricular (icv) infusion of Na rich aCSF or aldosterone. The aim of this study was to assess the effect of Na rich aCSF on ENaC and whether spironolactone prevents these effects. ENaC expression was assessed by quantitative RT‐PCR and immunohistochemistry in the brains of Wistar rats following 2 weeks icv infusion (@5 μl/hr) of aCSF (145 mmol/L Na), aCSF & spironolactone (@ 100 ng/hr), Na rich aCSF (800 mmol/L Na) or, Na rich aCSF & spironolactone. Increasing CSF [Na + ] by 5–6 mmol/L with Na rich aCSF, increased α and β ENaC immunoreactivity in the ependyma of the anteroventral 3 rd ventricle (AV3V) by 20–30% which was prevented by spironolactone; increased γ ENaC mRNA in the supraoptic nucleus (SON) 2 fold, also prevented by spironolactone; but decreased α ENaC mRNA in the paraventricular nucleus (PVN) by 25% which was not prevented by spironolactone. Na rich aCSF did not affect immunoreactivity to the ENaC subunits in the SON & PVN. The results suggest non‐coordinate regulation of ENaC subunits by Na rich aCSF in different areas. Increased [Na + ] in the AV3V region caused by enhanced ENaC expression in the ependyma may contribute to sympathoexcitation and hypertension.
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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".