Healthy VolunteersPhase 2NCT01758432
Phase 2 Healthy Volunteer Study to Evaluate the Ability of PRT064445 to Reverse the Effects of Several Blood Thinner Drugs on Laboratory Tests (Module 1 of 4)
A Phase 2 study testing PRT064445/Apixaban in people with Healthy Volunteers, run by Portola Pharmaceuticals at 1 site in United States.
Trial summary
The purpose of this study is to evaluate the ability of PRT064445 to reverse the effects of several blood thinner drugs on laboratory tests. The study also is evaluating the blood levels of PRT064445 given at different doses. Read more about this study
- Who is it for?
- Ages 18 to 45 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy Volunteers
- What is being tested?
- PRT064445/Apixaban
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 54 participants
- Where
- 1 siteUnited States
- Study dates
- Dec 2012to Sep 2015
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 45 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Healthy men or women between the ages of 18 and 45 years old
Who cannot join
- History (including family history) or symptoms of, or risk factors for bleeding
- History (including family history) of or risk factors for a hypercoagulable or thrombotic condition
- Absolute/relative contraindication to anticoagulation or treatment with specific anticoagulants
- History of major surgery, severe trauma or bone fracture within 3 months prior to dosing; or planned surgery within 1 month after dosing.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Randomized, Double-Blind, Vehicle-Controlled Study to Assess the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Intravenously Administered PRT064445 After Dosing to Steady State With One of Four Direct/Indirect fXa Inhibitors in Healthy Volunteers
The purpose of this study is to evaluate the ability of PRT064445 to reverse the effects of several blood thinner drugs on laboratory tests. The study also is evaluating the blood levels of PRT064445 given at different doses.
Read the detailed description
A randomized, double-blind, vehicle-controlled study to assess the safety, tolerability, pharmacokinetics, and pharmacodynamics of intravenously administered PRT064445 after dosing to steady state with one of four direct/indirect fXa inhibitors in healthy volunteers
- Conditions
- Healthy Volunteers
- Being tested
- PRT064445/Apixaban, Placebo/Apixaban, Placebo
- Keywords
- Healthy volunteers
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PRT064445/ApixabanCombination product
Also called Andexanet
Placebo/ApixabanCombination product
PlaceboDrug
| Study group | Role | What they receive |
|---|---|---|
| Module 1 (90 mg bolus) | Experimental | 90 mg PRT064445 given as a single IV Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 (210 mg bolus) | Experimental | 210 mg PRT064445 given as a single IV bolus Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 (420 mg bolus) | Experimental | 420 mg PRT064445 given as a single IV bolus Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 (420 mg bolus + 180 mg infusion) 4 mg/min | Experimental | 600 mg PRT064445 given as follows: 420 mg IV over ~14 minutes (~30 mg/min), followed by a continuous infusion of 180 mg (4 mg/min over 45 minutes) Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 (420 mg bolus + 180 mg bolus) 30mg/min | Experimental | 600 mg PRT064445 given as follows: up to 420 mg IV over ~14 minutes (~30 mg/min), followed by a second bolus of 180 mg IV over ~6 minutes (~30 mg/min), 45 minutes after completion of the bolus Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 (420 mg bolus + 480 mg infusion) 4mg/min | Experimental | 900 mg PRT064445 given as follows: 420 mg IV, followed by a continuous infusion of 480 mg (4 mg/min over 120 minutes Receives: Combination Product: PRT064445/Apixaban; Combination Product: Placebo/Apixaban |
| Module 1 Placebo | Placebo comparator | Placebo administered intravenously (IV) as a bolus, two bolus doses or a bolus followed by continuous infusion. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Efficacy: Percent Change From Baseline in Anti-fXa Activity at 2 Mins Following Andexanet/Placebo Administration
Anti-fXa activity was measured immediately prior to (Baseline) and at 2 mins following andexanet/placebo administration. Anti-fXa activity was measured using a commercial kit (Coamatic Heparin-82 33 9363, DiaPharma)
Measured: Baseline to 2 minutes following the end of andexanet/placebo administration
Secondary outcomes (8)
Efficacy: Percent Change From Baseline in Thrombin Generation at 2 Mins Following Andexanet/Placebo Administration
Thrombin generation was measured immediately prior to (Baseline) and at 2 mins following andexanet/placebo administration. Thrombin generation was measured using a TF-initiated thrombin generation assay.
Measured: Baseline to 2 minutes following the end of andexanet/placebo administration
Efficacy: Percent Change From Baseline in Unbound Apixaban Plasma Concentration at 2 Mins Following Andexanet/Placebo Administration
Unbound apixaban concentrations was measured immediately prior to (Baseline) and at 2 mins following andexanet/placebo administration. Unbound plasma concentrations for apixaban were determined by a rapid equilibrium dialysis method followed by Liquid Chromatography-Mass Spectometry assay.
Measured: Baseline to 2 minutes following the end of andexanet/placebo administration
Andexanet Maximum Observed Plasma Concentration (Cmax)
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electrochemiluminescent assay. Cmax was taken directly from the raw data.
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Time of Maximum Observed Plasma Concentration (Tmax)
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electrochemiluminescent assay. Tmax was taken directly from the raw data.
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Total Volume of Distribution (Vss)
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electrochemiluminescent assay. Vss was calculated using a non-compartmental approach.
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Area Under the Drug Concentration-time Curve From Time 0 Extrapolated to Infinity (AUC0-inf )
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electrochemiluminescent assay. AUC0-inf was calculated using a non-compartmental approach
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Total Systemic Clearance (CL)
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electrochemiluminescent assay. CL was calculated using a non-compartmental approach, calculated as Dose/AUC0-inf
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Apparent Terminal Elimination Half-life (t1/2)
Plasma concentrations of andexanet was determined using a validated method that involved analysis of citrated human plasma by an electro chemiluminescent assay. t1/2 was determined by linear regression of the log concentration on the terminal portion of the plasma concentration-time curve.
Measured: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Jan 2013 (estimated)
- Study startDec 2012
- Primary completionSep 2015
- Study completionSep 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Healthy VolunteersStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- This study has four modules with a total of 21 cohorts, each module was reported and submitted separately. Module 1, NCT01758432 (54 subjects with 7cohorts including placebo); Module 2, NCT03578146 (48 subjects with 6 cohorts including placebo); Module 3, NCT03551730 (27 subjects with 4 cohorts including placebo); Module 4, NCT03551743 (28 subjects with 4 cohorts including placebo)
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 54 participants (actual)
Sponsor and investigators
- Lead sponsor
- Portola Pharmaceuticals
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01758432
- Sponsor's protocol ID
- 12-502 Module 1
- Status last verified
- Aug 2023
- First submitted
- 18 Dec 2012
- Last updated
- 7 Aug 2023
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Siegal D, Lu G, Leeds JM, Karbarz M, Castillo J, Mathur V, Hutchaleelaha A, Sinha U, Kitt M, McClure M, Hollenbach SJ, Curnutte JT, Conley PB, Crowther M. Safety, pharmacokinetics, and reversal of apixaban anticoagulation with andexanet alfa. Blood Adv. 2017 Sep 22;1(21):1827-1838. doi: 10.1182/bloodadvances.2017007112. eCollection 2017 Sep 26.
PubMed 29296829
Study at a glance
From the registry record, last updated by the sponsor on 7 Aug 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Randomized, Double-Blind, Vehicle-Controlled Study to Assess the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Intravenously Administered PRT064445 After Dosing to Steady State With One of Four Direct/Indirect fXa Inhibitors in Healthy Volunteers
- ClinicalTrials.gov ID
- NCT01758432
- Acronym / sponsor ID
- 12-502 Module 1
- Conditions
- Healthy Volunteers
- Keywords
- Healthy volunteers
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 54 participants (actual)
- Lead sponsor
- Portola PharmaceuticalsIndustry (pharma, biotech, devices)
- Study start
- Dec 2012
- Primary completion
- Sep 2015 (actual)
- Study completion
- Sep 2015 (actual)
- First posted
- 1 Jan 2013 (estimated)
- Results
- Posted 10 Aug 2018
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to evaluate the ability of PRT064445 to reverse the effects of several blood thinner drugs on laboratory tests. The study also is evaluating the blood levels of PRT064445 given at different doses.
Detailed description
A randomized, double-blind, vehicle-controlled study to assess the safety, tolerability, pharmacokinetics, and pharmacodynamics of intravenously administered PRT064445 after dosing to steady state with one of four direct/indirect fXa inhibitors in healthy volunteers
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 7
- Model description
- This study has four modules with a total of 21 cohorts, each module was reported and submitted separately. Module 1, NCT01758432 (54 subjects with 7cohorts including placebo); Module 2, NCT03578146 (48 subjects with 6 cohorts including placebo); Module 3, NCT03551730 (27 subjects with 4 cohorts including placebo); Module 4, NCT03551743 (28 subjects with 4 cohorts including placebo)
| Arm | Type | Receives |
|---|---|---|
| Module 1 (90 mg bolus) | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban90 mg PRT064445 given as a single IV |
| Module 1 (210 mg bolus) | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban210 mg PRT064445 given as a single IV bolus |
| Module 1 (420 mg bolus) | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban420 mg PRT064445 given as a single IV bolus |
| Module 1 (420 mg bolus + 180 mg infusion) 4 mg/min | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban600 mg PRT064445 given as follows: 420 mg IV over ~14 minutes (~30 mg/min), followed by a continuous infusion of 180 mg (4 mg/min over 45 minutes) |
| Module 1 (420 mg bolus + 180 mg bolus) 30mg/min | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban600 mg PRT064445 given as follows: up to 420 mg IV over ~14 minutes (~30 mg/min), followed by a second bolus of 180 mg IV over ~6 minutes (~30 mg/min), 45 minutes after completion of the bolus |
| Module 1 (420 mg bolus + 480 mg infusion) 4mg/min | Experimental | Combination Product: PRT064445/Apixaban, Combination Product: Placebo/Apixaban900 mg PRT064445 given as follows: 420 mg IV, followed by a continuous infusion of 480 mg (4 mg/min over 120 minutes |
| Module 1 Placebo | Placebo comparator | Drug: PlaceboPlacebo administered intravenously (IV) as a bolus, two bolus doses or a bolus followed by continuous infusion. |
Who may qualify
- Ages
- 18 to 45 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- Healthy men or women between the ages of 18 and 45 years old
Key exclusion criteria (4 listed)
- History (including family history) or symptoms of, or risk factors for bleeding
- History (including family history) of or risk factors for a hypercoagulable or thrombotic condition
- Absolute/relative contraindication to anticoagulation or treatment with specific anticoagulants
- History of major surgery, severe trauma or bone fracture within 3 months prior to dosing; or planned surgery within 1 month after dosing.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| PRT064445/ApixabanAlso: Andexanet | Combination product | Module 1 (210 mg bolus), Module 1 (420 mg bolus + 180 mg bolus) 30mg/min, Module 1 (420 mg bolus + 180 mg infusion) 4 mg/min, Module 1 (420 mg bolus + 480 mg infusion) 4mg/min, Module 1 (420 mg bolus), Module 1 (90 mg bolus) |
| Placebo/Apixaban | Combination product | Module 1 (210 mg bolus), Module 1 (420 mg bolus + 180 mg bolus) 30mg/min, Module 1 (420 mg bolus + 180 mg infusion) 4 mg/min, Module 1 (420 mg bolus + 480 mg infusion) 4mg/min, Module 1 (420 mg bolus), Module 1 (90 mg bolus) |
| Placebo | Drug | Module 1 Placebo |
Primary outcome
Efficacy: Percent Change From Baseline in Anti-fXa Activity at 2 Mins Following Andexanet/Placebo Administration
Time frame: Baseline to 2 minutes following the end of andexanet/placebo administration
Anti-fXa activity was measured immediately prior to (Baseline) and at 2 mins following andexanet/placebo administration. Anti-fXa activity was measured using a commercial kit (Coamatic Heparin-82 33 9363, DiaPharma)
8 secondary outcomes
Efficacy: Percent Change From Baseline in Thrombin Generation at 2 Mins Following Andexanet/Placebo Administration
Time frame: Baseline to 2 minutes following the end of andexanet/placebo administration
Efficacy: Percent Change From Baseline in Unbound Apixaban Plasma Concentration at 2 Mins Following Andexanet/Placebo Administration
Time frame: Baseline to 2 minutes following the end of andexanet/placebo administration
Andexanet Maximum Observed Plasma Concentration (Cmax)
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Time of Maximum Observed Plasma Concentration (Tmax)
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Total Volume of Distribution (Vss)
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Area Under the Drug Concentration-time Curve From Time 0 Extrapolated to Infinity (AUC0-inf )
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Total Systemic Clearance (CL)
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Andexanet Apparent Terminal Elimination Half-life (t1/2)
Time frame: Blood was collected at predose, 0.033, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 and 14.5 hours postdose.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Aug 2023.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 29296829Siegal D, Lu G, Leeds JM, Karbarz M, Castillo J, Mathur V, Hutchaleelaha A, Sinha U, Kitt M, McClure M, Hollenbach SJ, Curnutte JT, Conley PB, Crowther M. Safety, pharmacokinetics, and reversal of apixaban anticoagulation with andexanet alfa. Blood Adv. 2017 Sep 22;1(21):1827-1838. doi: 10.1182/bloodadvances.2017007112. eCollection 2017 Sep 26.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing PRT064445/Apixaban in people with Healthy Volunteers, run by Portola Pharmaceuticals at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Aug 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 10 Aug 2018). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Efficacy: Percent Change From Baseline in Anti-fXa Activity at 2 Mins Following Andexanet/Placebo Administration (time frame: Baseline to 2 minutes following the end of andexanet/placebo administration). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01758432, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Aug 2023.