- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01096160
A Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of MK8266 in Hypertensive Men (MK-8266-002)
June 24, 2019 updated by: Merck Sharp & Dohme LLC
A Multiple Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of MK-8266
This study evaluated adverse events (AEs), study discontinuation due to AEs, and pharmacodynamics of MK-8266 in male participants with mild to moderate hypertension.
Study Overview
Status
Completed
Conditions
Detailed Description
This study evaluated AEs, discontinuation due to AEs, and effects on hemodynamic parameters, including systolic blood pressure (SBP) and aortic augmentation index (AIx), following multiple oral doses of MK-8266.
Five serial panels, each consisting of eight participants (40 participants in Panels A, B, C, D, and E), were randomized to receive either MK-8266 or matching placebo twice daily (BID) or three times daily (TID) for 10 consecutive days.
Although the original plan was to evaluate MK-8266 treatment in Panels D and E using both BID and TID regimens, the study actually evaluated identical TID regimens in these panels.
Study Type
Interventional
Enrollment (Actual)
40
Phase
- Phase 1
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 55 years (Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
Male
Description
Inclusion Criteria:
- Participant is male with essential hypertension (high blood pressure)
- Participant is in good general health (with the exception of hypertension)
- Participant has a Body Mass Index (BMI) <= 33 kg/m^2 at the Screening visit
- Participant has a platelet count >= 150,000 cu/mL at the Screening visit
- Participant has a positive AIx at the Screening visit
Exclusion Criteria:
- Participant has a history of stroke, chronic seizure, or major neurological disease
- Participant has a functional disability that can interfere with rising from a seated position to the standing position
- Participant has any history of a bleeding or clotting disorder
- Participant has a history of cancer
- Participant is unable to refrain from or anticipates the use of any prescription or non-prescription medication
- Participant consumes excessive amounts of alcohol or caffeinated beverages daily
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Sequential Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Panel A: MK-8266 BID, 1 mg/Placebo
MK-8266 1 mg (0.7 mg in the morning [AM] + 0.3 mg in the evening [PM]), or as matching placebo BID.
|
MK-8266 1 mg administered as oral capsules (0.7 mg + 0.3 mg), BID for 10 consecutive days.
Panel A was completed prior to initiation of Panel B.
Other Names:
Placebo administered as oral capsules BID for 10 consecutive days.
Panel A was completed prior to initiation of Panel B.
|
Experimental: Panel B: MK-8266 BID, 1.8 mg/Placebo
MK-8266 1.8 mg (1 mg in the AM + 0.8 mg in the PM), or as matching placebo BID.
|
MK-8266 1.8 mg administered as oral capsules (1 mg + 0.8 mg), BID for 10 consecutive days.
Panel B was completed prior to initiation of Panel C.
Other Names:
Placebo administered as oral capsules BID for 10 consecutive days.
Panel B was completed prior to initiation of Panel C.
|
Experimental: Panel C: MK-8266 TID, 1.8 mg/Placebo
MK-8266 TID, 1.8 mg (0.6 mg every 6 hours [q6hr]), or as matching placebo TID.
|
MK-8266 1.8 mg administered as oral capsules (0.6 mg), TID for 10 consecutive days.
Panel C was completed prior to initiation of Panel D.
Other Names:
Placebo administered as oral capsules TID for 10 consecutive days.
Panel C was completed prior to initiation of Panel D.
|
Experimental: Panel D: MK-8266 TID, 2.4 mg/Placebo
MK-8266 TID (Panel D), 2.4 mg (0.8 mg q6hr), or as matching placebo TID.
Panel D was completed prior to initiation of Panel E.
|
MK-8266 TID (Panel D), 2.4 mg administered as oral capsules (0.8 mg), TID for 10 consecutive days.
Panel D was completed prior to initiation of Panel E.
Other Names:
MK-8266 TID (Panel E), 2.4 mg administered as oral capsules (0.8 mg), TID for 10 consecutive days.
Panel E was initiated after completion of Panel D.
Other Names:
Placebo administered as oral capsules TID for 10 consecutive days.
Panel D was completed prior to initiation of Panel E.
|
Experimental: Panel E: MK-8266 TID, 2.4 mg/Placebo
MK-8266 TID (Panel E), 2.4 mg (0.8 mg q6hr), or as matching placebo TID.
Panel E was initiated after completion of Panel D.
|
MK-8266 TID (Panel D), 2.4 mg administered as oral capsules (0.8 mg), TID for 10 consecutive days.
Panel D was completed prior to initiation of Panel E.
Other Names:
MK-8266 TID (Panel E), 2.4 mg administered as oral capsules (0.8 mg), TID for 10 consecutive days.
Panel E was initiated after completion of Panel D.
Other Names:
Placebo administered as oral capsules TID for 10 consecutive days.
Panel E was initiated after completion of Panel D.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Participants Receiving MK-8266 or Placebo Who Experienced At Least One Adverse Event (AE) During Treatment and Postdose Follow-up
Time Frame: Up to 24 days
|
Assessment of the number of participants with at least one clinical or laboratory AE in those receiving multiple oral doses of MK-8266.
An AE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the sponsor's product, whether or not considered related to the use of the product.
|
Up to 24 days
|
Participants Receiving MK-8266 or Placebo Who Discontinued Treatment Due to an AE
Time Frame: Up to 10 days
|
Assessment of the number of participants receiving MK-8266 who discontinued therapy due to an AE over 10 days of treatment.
An AE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the SPONSOR's product, whether or not considered related to the use of the product.
The number of participants in any treatment group who discontinued therapy due to an AE was primarily assessed for Days 0-10.
|
Up to 10 days
|
Change From Baseline in Systolic Blood Pressure (SBP) Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Baseline and Day 10
|
Assessment of the change from baseline in SBP, obtained using a validated, semi-automated oscillometric device.
Evaluated for MK-8266 relative to placebo in participants, as measured by the time weighted average change over 24 hours postdose (TWA^0-24hrs) on dosing Day 10.
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this analysis.
|
Baseline and Day 10
|
Heart Rate (HR) on Day 10 Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Day 10 (24 hours postdose)
|
Assessment of HR (beats/min) on Day 10 (24-hours postdose) with MK-8266 relative to placebo in participants, as measured by the time weighted average change over 24 hours postdose (TWA^0-24hrs).
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this analysis.
Baseline HR values are shown in the Baseline Characteristics section for Panels A, B, C, D, E.
|
Day 10 (24 hours postdose)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Aortic Augmentation Index (AIx) on Day 10 Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Day 10
|
Assessment of the central, ascending aortic blood pressure augmentation index (AIx), based on measurement of central pulse pressure at selected time points on Day 10, as measured by applanation tonometry of the radial artery.
This outcome measure assessed the time weighted average change over 24 hours postdose (TWA^0-24hrs) on dosing Day 10.
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this assessment.
|
Day 10
|
Change From Baseline in Cyclic Guanosine Monophosphate (cGMP) Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Baseline and Day 10
|
Assessment of whole blood samples for cGMP analysis, based on samples obtained predose as well as 4 and 24 hours postdose on Day 1 and Day 10, and predose only on Day 4. The change from baseline in cGMP was assessed at 24 hours postdose on Day 10.
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this assessment.
|
Baseline and Day 10
|
Percent Inhibition of Platelet Aggregation Induced by Adenosine Diphosphate (ADP) Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Baseline and Day 10 (5 hours postdose)
|
The percent inhibition of ADP-induced platelet aggregation from Baseline to 5 hours postdose on Day 10 was assessed and is summarized here.
Platelet aggregation was initiated by addition of ADP (2.5 µM) to the participant's blood sample.
Aggregation was followed for 5 minutes after addition of the agonist, and the maximum percent of light transmission (extent of aggregation) obtained during this period, as well as the instrument-calculated slope (rate of aggregation), were reported.
Post treatment platelet aggregation is expressed as a percent of each participant's pretreatment level of aggregation.
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this summary.
The data are very limited.
On Day 10 only 8 participants received MK-8266 0.8 mg TID and 3 participants received placebo.
|
Baseline and Day 10 (5 hours postdose)
|
Percent Inhibition of Platelet Aggregation Induced by Collagen Following Multiple Oral Doses of MK-8266 or Placebo
Time Frame: Baseline and Day 10 (5 hours postdose)
|
The percent inhibition of collagen-induced platelet aggregation from Baseline to 5 hours postdose on Day 10 was assessed and is summarized here.
Platelet aggregation was initiated by addition of collagen (2 µg/mL) to the participant's blood sample.
Aggregation was followed for 5 minutes after addition of the agonist, and the maximum percent of light transmission (extent of aggregation) obtained during this period, as well as the instrument-calculated slope (rate of aggregation), were reported.
Post treatment platelet aggregation is expressed as a percent of each participant's pretreatment level of aggregation.
Panel D and Panel E had identical treatments (MK-8266 0.8 mg TID), which were combined for this summary.
The data are very limited.
On Day 10, only 8 participants received MK-8266 0.8 mg TID and 3 participants received placebo.
|
Baseline and Day 10 (5 hours postdose)
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
March 1, 2010
Primary Completion (Actual)
November 1, 2010
Study Completion (Actual)
November 1, 2010
Study Registration Dates
First Submitted
March 26, 2010
First Submitted That Met QC Criteria
March 29, 2010
First Posted (Estimate)
March 30, 2010
Study Record Updates
Last Update Posted (Actual)
August 12, 2019
Last Update Submitted That Met QC Criteria
June 24, 2019
Last Verified
June 1, 2019
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 8266-002
- 2010-018654-13 (EudraCT Number)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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