Cardiovascular and Pharmacokinetic Profiles of Intravenous Etripamil in Conscious Telemetered Cynomolgus Monkeys
Bibliographic record
Abstract
Paroxysmal supraventricular tachycardia (PSVT) is a common cardiac arrhythmia associated with substantial health care burden. Etripamil, a fast-acting non-dihydropyridine calcium channel blocker developed for intranasal self-administration, is currently under investigation for acute treatment of PSVT episodes. A novel two-phase study design was used to test a series of five doses of intravenous etripamil (0, 0.025, 0.05, 0.15, and 0.3 mg/kg) in conscious cynomolgus monkeys. The cardiovascular effects (e.g., blood pressure and ECG recordings) were assessed during the first phase, and the pharmacokinetic profile was characterized during the second phase. Animals were dosed remotely to avoid the stress of intranasal dosing and minimize the impact of dose administration on measurements. Results were compared with findings from subsequent intranasal studies in cynomolgus monkeys and humans. Etripamil decreased systolic blood pressure and increased heart rate proportionately in a dose-dependent manner. Etripamil also induced dose-dependent increases in the PR interval. At a dose of 0.3 mg/kg (the highest dose), the mean highest PR prolongation from baseline during 20 minutes after dosing was 27.38%. Systemic exposure to etripamil increased in a dose-dependent manner. Mean area under the curve from administration to when drug was no longer present (AUC 0–∞ ) values ranged from 179 to 2364 ng • min/mL, peak plasma concentration ranged from 13.2 to 176 ng/mL, and mean half-life ranged from 12.3 to 20.8 minutes (Figure 1). Results were consistent with data from subsequent intranasal preclinical and clinical studies. Intravenous etripamil demonstrated the desired targeted pharmacokinetic and pharmacodynamic profiles in conscious cynomolgus monkeys.
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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".