Hydralazine Prevents Changes in the Contractile Response of Aortic but Not Portal Vein Strips in Hypertensive Rats
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Bibliographic record
Abstract
Previous studies showed that aortic strips from rats with either spontaneous (SHR) or DOCA/salt-induced hypertension developed less stress (force/area) in response to noradrenaline (NA) when compared to aortic strips from normotensive rats. Portal vein strips from SHR, but not from DOCA/salt hypertensive rats, developed greater force to NA compared to strips from control rats. We have investigated whether these changes are prevented by hydralazine. Hydralazine was added to the drinking solution (1% NAC1) of one group of rats from the first day of treatment with DOCA. In the second group, hydralazine was added to the drinking water of 13-week-old SHR. After 3 weeks of treatment with hydralazine, cumulative dose-response relationships to NA were studied using aortic and portal vein strips from hydralazine-treated and control rats. Hydralazine prevented the increase of arterial pressure and the decrease of stress developed to NA by the aortic strips from both SHR and DOCA/salt rats. It did not prevent the increase of force developed to NA by the portal vein strips from SHR. Thus, reduced contractile response of the aortic strips from hypertensive rats seems to be the result of a high pressure, since both the rise in blood pressure and reduced aortic response are prevented by hydralazine. Increased contratile response of the portal vein strips from SHR appears to be independent of blood pressure.
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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 | 0.001 |
| 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) | 0.000 | 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 it