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Thromboxane Receptor Antagonist to Improve Endothelial Cell Function (TRAP)

J

Jeffrey Rade

Status and phase

Active, not recruiting
Phase 2

Conditions

Cardiovascular Diseases
Vascular Dilation

Treatments

Drug: Ifetroban Sodium
Other: Placebo

Study type

Interventional

Funder types

Other
Industry

Identifiers

NCT03962855
UMMS-TPRA-01

Details and patient eligibility

About

This study evaluates whether addition of the thromboxane receptor antagonist to chronic aspirin therapy improves endothelial function and reduces non-platelet thromboxane generation in patients with established cardiovascular disease. Half of participants will receive ifetroban and the other half will receive matchcing placebo for the 4 week study period.

Full description

Thromboxane is a prostaglandin produced in healthy individuals mainly in platelets, where it mediates platelet activation and vasoconstriction via binding to cellular thromboxane-prostanoid (TP) receptors. The cardioprotective effect of aspirin is due to suppression of platelet thromboxane generation and reactivity. Unfortunately 25-50% of patients with cardiovascular disease taking ASA continue to generate thromboxane from non-platelet sources, which significantly increases their risk of atherothrombosis and death. Evidence suggests that oxidative stress is a potent stimulus for thromboxane generation in endothelial cells that involves autocrine/paracrine signaling through the TP receptor. This clinical trial addresses the central hypothesis that vascular endothelial cells under oxidative stress are a major source of non-platelet thromboxane generation in patients with cardiovascular disease and that antagonism of the TP receptor will suppress its formation and improve endothelial function.

Enrollment

52 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Males and females ≥18 years of age with established cardiovascular disease
  • Take 81 mg daily of aspirin as part of their daily medical regimen
  • Urine thromboxane B2 metabolites >1500 pg/mg creatinine on screening.
  • Able to provide written consent and comply with protocol-specific procedures.

Exclusion criteria

  • Chronic oral anticoagulation.
  • ST segment myocardial infarction within 1 month.
  • Cardiac surgery within 1 month.
  • Ongoing uncontrolled severe inflammatory condition.
  • Pregnant or lactating.
  • Ifetroban or aspirin sensitivity
  • Inability to perform vascular testing.

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Quadruple Blind

52 participants in 2 patient groups, including a placebo group

Ifetroban
Active Comparator group
Description:
Ifetroban 250 mg oral capsule administered once daily for a minimum of 4 weeks.
Treatment:
Drug: Ifetroban Sodium
Placebo
Placebo Comparator group
Description:
Matching placebo administered once daily for a minimum of 4 weeks.
Treatment:
Other: Placebo

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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