Trial to Assess the Safety of Vorapaxar in Japanese Subjects With Cerebral Infarction (P05005; MK-5348-017)

Phase II Study of SCH 530348 in Subjects With Cerebral Infarction

The study is designed to assess safety of Vorapaxar when added to standard of care (aspirin) in Japanese subjects with cerebral infarction. The study will assess incidence and tolerability of bleeding, major adverse cardiac events, all adverse events, and effect on expression of markers of inflammation.

Study Overview

• Status: Completed
• Conditions: Cerebral Infarction
• Intervention / Treatment: Drug: Vorapaxar 2.5 mg; Drug: Aspirin 75-150 mg; Drug: Vorapaxar 1 mg; Drug: Placebo

• Study Type: Interventional
• Enrollment (Actual): 90
• Phase: Phase 2

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Men and women at least 18 years old with last cerebral infarction (excluding cardiogenic cerebral embolism) having occurred from 14 days to less than 1 year after onset (at the time of obtaining consent), with stable nervous system for more than 24 hours and known course of disease.
• Participants confirmed to have cerebral infarction lesion by brain computerized tomography (CT) or magnetic resonance imaging (MRI).
• Both of in-participant and out-participant
• Willing to give appropriate informed consent and complete all study-related procedures and able to adhere to dosing and visit schedules.
• Women of child-bearing potential (all postmenopausal women who are <1 year menopausal or who have not had surgical sterilization or a hysterectomy are considered to be women of child-bearing potential) must agree to use a medically accepted method of contraception while receiving protocol-specified study drug, and for 60 days after completion or discontinuation of the medication.

Exclusion Criteria:

• Pregnancy and nursing patients (premenopausal women should have a negative pregnancy test result confirmed before enrollment)
• Participant with any serious complication or any condition that the investigator feels that would cause a significant hazard to the participant if the study drug is administered.
• Known hypersensitivity to any component of the study drug.
• Participation in a study or use of an investigational study drug within 30 days before obtaining consent.
• Member of the staff personnel directly involved with this study
• Family member of the study staff.
• History of a bleeding diathesis, or evidence of active abnormal bleeding within 30 days before obtaining consent.
• History of cerebral hemorrhage.
• Severe hypertension (systolic blood pressure >200 mmHg or diastolic blood pressure >110 mmHg).
• Major surgery within 2 weeks before obtaining consent.
• Known platelet count <100,000/mm^3
• Participants confirmed to have cerebral bleeding or any causes of cerebral bleeding by brain CT or MRI.
• Participants with transient ischemic attack (TIA), progressive stroke or cardiogenic cerebral embolism.
• Known impairment of renal function (serum creatinine >2.0 mg/dL [>176.8 (umol/L]), dysproteinemia, nephrotic syndrome, or other renal disease
• Active or chronic hepatobiliary system or hepatic disease, or aspartate aminotransferase (GOT) or alanine aminotransferate (GPT) activity more than two times greater than the upper limit of the laboratory normal range.
• Participants with contraindictation to aspirin.
• Scheduled to have PCI (peripheral coronary intervention), peripheral interventional event, carotid endarterectomy, intra- and extra- cranial bypass surgery and intravascular surgery (angioplasty) during the study period.
• Combination therapy with unfractionated heparin, tissue plasminogen activator, urokinase, warfarin, factor Xa inhibitor, direct thrombin inhibitor or antiplatelet agents other than aspirin after obtaining consent, or scheduled to have the above combination therapy.
• Any serious impairment which would make detection of new ischemic events difficult (eg, bedridden participants, participants with total nursing care, dementia participants, etc.) or consciousness disturbance which may cause aspiration of the study drug.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Vorapaxar 2.5 mg + Aspirin; Vorapaxar oral tablets; once daily for 60 days + Aspirin.	Drug: Vorapaxar 2.5 mg; Oral tablets; once daily for 60 days.; Drug: Aspirin 75-150 mg; oral tablets; once daily for 60 days
Experimental: Vorapaxar 1 mg + Aspirin; Vorapaxar oral tablets; once daily for 60 days + Aspirin.	Drug: Aspirin 75-150 mg; oral tablets; once daily for 60 days; Drug: Vorapaxar 1 mg; Oral tablets; once daily for 60 days
Placebo Comparator: Placebo + Aspirin; Placebo oral tablets; once daily for 60 days + Aspirin	Drug: Aspirin 75-150 mg; oral tablets; once daily for 60 days; Drug: Placebo; oral tablets; once daily for 60 days

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants Experiencing Non-Major Adverse Cardiac Events (Non-MACE)	An adverse event (AE) is any unfavorable and unintended change in the structure, function, or chemistry of the body temporarily associated with study drug administration, whether or not considered related to study drug. MACE events were defined as nonfatal myocardial infarction (MI), nonfatal stroke, hospitalization due to recurrent ischemia, or urgent coronary revascularization. All MACE events were excluded from this analysis.	Up to Day 121

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Paticipants Experiencing Thrombolysis in Myocardial Infarction (TIMI) Major, Minor, and Non-TIMI Bleeding Events	Major TIMI bleeding was defined as any intracranial bleeding (excluding micohemorrhages <10 mm evident on magnetic resonance imaging [MRI]), clinical over signs of hemorrhge associated with a drop in hemoglobin >=5 g/dL, or fatal bleeding (bleeding that directly results in death within 7 days). Minor TIMI bleeding was defined as any clinically overt bleeding resulting in a hemoglobin drop of 3 to <5 g/dL. Non-TIMI bleeding included all bleeding events not covered under Major TIMI or Minor TIMI bleeding.	Up to Day 60
Number of Participants With MACE or Death	The number of participants experiencing major cardiac events or death was evaluated up to Day 121. Major cardiac events were defined as nonfatal stroke, hospitalization due to recurrent ischemia, or urgent coronary revascularization.	Up to Day 121
Median High-Sensitivity C-Reactive Protein (Hs-CRP) Levels By Study Visit	Participant blood samples were collected to determine the median serum level of hs-CRP. hs-cRP levels reflect the underlying level of inflammation. The higher the level, the greater the disease burden.	Up to Day 60
Mean CD40 Ligand Levels By Study Visit	Participant blood samples were collected to determine the mean serum level of CD40 ligand. CD40 ligand values represent the level of disease activation with a higher level of CD40 ligand indicating a greater underlying risk.	Up to Day 60
Mean Membrane-Bound P-Selectin Levels By Study Visit	Participant blood samples were collected at Baseline, Day 30, and Day 60 to determine the mean level of membrane-bound p-selectin in the serum. Membrane-bound P-selectin levels reflect the underlying level of inflammation. Intensity levels are reported in arbitrary units 0 (dark) to 1023 (bright). Higher values correspond to greater membrane-bound P-Selectin levels.	Up to Day 60

Collaborators and Investigators

• Sponsor: Merck Sharp & Dohme LLC

Publications and helpful links

General Publications

• Shinohara Y, Goto S, Doi M, Jensen P. Safety of the novel protease-activated receptor-1 antagonist vorapaxar in Japanese patients with a history of ischemic stroke. J Stroke Cerebrovasc Dis. 2012 May;21(4):318-24. doi: 10.1016/j.jstrokecerebrovasdis.2010.09.005. Epub 2010 Oct 14.

Study record dates

Study Major Dates

• Study Start (Actual): September 21, 2006
• Primary Completion (Actual): November 8, 2007
• Study Completion (Actual): November 8, 2007

Study Registration Dates

• First Submitted: May 22, 2008
• First Submitted That Met QC Criteria: May 22, 2008
• First Posted (Estimate): May 26, 2008

Study Record Updates

• Last Update Posted (Actual): September 21, 2018
• Last Update Submitted That Met QC Criteria: August 22, 2018
• Last Verified: August 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Ischemia; Pathologic Processes; Necrosis; Cardiovascular Diseases; Vascular Diseases; Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Brain Ischemia; Stroke; Brain Infarction; Infarction; Cerebral Infarction; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Peripheral Nervous System Agents; Enzyme Inhibitors; Analgesics; Sensory System Agents; Anti-Inflammatory Agents, Non-Steroidal; Analgesics, Non-Narcotic; Anti-Inflammatory Agents; Antirheumatic Agents; Fibrinolytic Agents; Fibrin Modulating Agents; Platelet Aggregation Inhibitors; Cyclooxygenase Inhibitors; Antipyretics; Aspirin; Vorapaxar
• Other Study ID Numbers: P05005

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: https://www.merck.com/clinical-trials/pdf/ProcedureAccessClinicalTrialData.pdf

Study Data/Documents

1. CSR Synopsis