Negative Influence of Insufficient Sleep on Endothelial Vasodilator and Fibrinolytic Function in Hypertensive Adults
Bibliographic record
Abstract
Insufficient nightly sleep (<7 hour/night) has been linked to the cause of hypertension and is a prevalent, often ignored, comorbidity. We tested the hypotheses that chronic nightly insufficient sleep is associated with lower nitric oxide-mediated endothelium-dependent vasodilation and endothelial tPA (tissue-type plasminogen activator) release in hypertensive adults; and that the insufficient sleep-related reduction in endothelial vasodilator and fibrinolytic function is due to increased oxidative stress. Fifty hypertensive adults were studied: 20 with normal nightly sleep duration (14M/6F; age: 59±2 year; blood pressure: 138/83±1/1 mm Hg; sleep: 7.6±0.1 hour/night) and 30 with short nightly sleep duration (21M/9F; 56±1 year; 138/84±2/1 mm Hg; 5.8±0.1 hour/night). Forearm blood flow (plethysmography) was determined in response to intraarterial infusion of: acetylcholine in the absence and presence of N G -monomethyl-L-arginine and the antioxidant vitamin C; bradykinin in the absence and presence of vitamin C; and sodium nitroprusside. Endothelial release of tPA was determined in response to bradykinin without and with vitamin C. Vasodilation to acetylcholine was significantly lower (≈20%) in the short versus normal sleep adults. N G -monomethyl-L-arginine reduced (≈25%; P <0.05) acetylcholine vasodilation in the normal but not short sleepers. Vitamin C increased (≈35%; P <0.05) acetylcholine vasodilation in short sleepers only. Endothelial tPA release to bradykinin was significantly lower (≈25%) in the short versus normal sleep duration adults. Co-infusion of vitamin C induced greater tPA release in short sleepers. In hypertensive adults, insufficient sleep is associated with reduced nitric oxide–mediated endothelium-dependent vasodilation and endothelial tPA release. These sleep-related abnormalities in endothelial function are due, in part, to oxidative stress.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".