We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Efficacy, Safety and Tolerability of PF-06649751 in Parkinson's Disease Patients at Early Stage of the Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT02847650
Recruitment Status : Terminated (Study B7601011 was terminated on 29 Jan 2018 due to lack of efficacy in moderate/advanced Parkinson's disease.)
First Posted : July 28, 2016
Results First Posted : January 15, 2019
Last Update Posted : November 23, 2020
Information provided by (Responsible Party):

Brief Summary:
The purpose of this study is to evaluate the efficacy, safety and tolerability of PF-06649751 in Parkinson's disease patients at early stage of the disease.

Condition or disease Intervention/treatment Phase
Parkinson Disease Drug: Placebo Drug: PF-06649751 Phase 2

Detailed Description:
The B7601011 study has a randomized, double-blind, placebo-controlled parallel group design. Approximately 88 subjects will be randomized to 2 treatment groups. Each subject will participate in the study for approximately 23 weeks including a 30 day screening period, 15 week double blind treatment period, and an approximately 28 day follow-up period.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 57 participants
Allocation: Randomized
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Actual Study Start Date : October 17, 2016
Actual Primary Completion Date : January 29, 2018
Actual Study Completion Date : January 29, 2018

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Placebo Comparator: Placebo Drug: Placebo
Other Name: oral tablet once daily

Experimental: PF-06649751 Drug: PF-06649751
Other Name: flexible dose oral tablet once daily

Primary Outcome Measures :
  1. Change From Baseline in the Movement Disorder Society - Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part III Total Score at Week 15 [ Time Frame: Baseline (Day -1/randomization), Week 15 ]
    MDS-UPDRS Part III was used to assess the motor signs of Parkinson's disease. It was comprised of 33 sub-scores based on 18 items, several with right, left or other body distribution scores. Each question was anchored with 5 responses that were linked to commonly accepted clinical terms: 0=normal, 1=slight, 2=mild, 3=moderate, and 4=severe. The MDS-UPDRS Part III total score range is 0-132. Higher score indicates more severe motor signs of Parkinson's disease. A negative change from baseline represents an improvement in motor function.

Secondary Outcome Measures :
  1. Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: From first dose of study treatment up to 28 days after last dose (up to Day 133) ]
    An AE was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; life-threatening (immediate risk of death); initial or prolonged inpatient hospitalization; persistent or significant disability/incapacity; congenital anomaly/birth defect. Treatment-emergent AEs were those with initial onset or increasing in severity after the first dose of study treatment.

  2. Number of Participants With Laboratory Test Abnormalities (Without Regard to Baseline Abnormality) [ Time Frame: Baseline (Day -1/randomization) up to Day 119 follow-up visit ]
    Following safety laboratory parameters were assessed against pre-defined abnormality criteria: hematology (hemoglobin, hematocrit, red blood cell count, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, platelet count, white blood cell count, absolute total neutrophils, absolute eosinophils, absolute basophils, absolute monocytes, and absolute lymphocytes); chemistry (blood urea nitrogen/urea and creatinine, glucose , calcium, sodium, potassium, chloride, total bicarbonate, aspartate aminotransferase [AST], alanine aminotransferase [ALT], total bilirubin, alkaline phosphatase, uric acid, albumin, total protein); urinalysis (pH, qualitative glucose, qualitative protein, qualitative blood, ketones, nitrites, leukocyte esterase, urine bilirubin, urobilinogen, urine creatinine, microscopy, and specific gravity).

  3. Number of Participants With Vital Signs Data Meeting Categorical Summarization and Orthostatic Hypotension Criteria [ Time Frame: Baseline (Day -1/randomization) up to Day 119 follow-up visit ]
    Vital signs categorical summarization criteria: 1) supine and standing systolic blood pressure (SBP) <90 millimeters of mercury (mmHg); 2) supine and standing diastolic blood pressure (DBP) <50 mmHg; 3) supine pulse rate <40 or >120 beats per minute (bpm); 4) standing pulse rate <40 or >140 bpm; 5) maximum change from baseline (increase or decrease) in supine and standing DBP greater than or equal to (>=) 20 mmHg; 6) maximum change from baseline (increase or decrease) in supine and standing SBP >=30 mmHg. Orthostatic hypotension criterion was defined as a decrease of >=20 mmHg for SBP or >=10 mmHg for DBP 2 minutes after standing from a supine position.

  4. Number of Participants Meeting the Categorical Summarization Criteria for Electrocardiogram (ECG) Parameters [ Time Frame: Baseline (Day -1/randomization) up to Day 119 follow-up visit ]
    ECG categorical summarization criteria: 1) QRS duration (time from ECG Q wave to the end of the S wave corresponding to ventricle depolarization): >=140 milliseconds (msec), >=50% increase from baseline; 2) PR interval (the interval between the start of the P wave and the start of the QRS complex, corresponding to the time between the onset of the atrial depolarization and onset of ventricular depolarization): >=300 msec, >=25% increase when baseline is > 200 msec or >=50% increase when baseline is less than or equal to (<=) 200 msec; 3) QT interval (time from ECG Q wave to the end of the T wave corresponding to electrical systole): absolute value of >=500 msec; 4) QTcF interval (QT corrected for heart rate using Fridericia's formula): absolute value of 450 to <480 msec, 480 to <500 msec, >=500 msec; an increase from baseline of 30 to <60 msec or >=60 msec.

  5. Number of Participants With Worsening and New Onset Suicidality as Assessed by Columbia Suicide Severity Rating Scale (C-SSRS) [ Time Frame: Baseline (Day -1/randomization) up to Day 119 follow-up visit ]
    The C-SSRS is an interview based rating scale to systematically assess suicidal ideation and suicidal behavior. C-SSRS responses were mapped to the Columbia Classification Algorithm of Suicide Assessment (C-CASA). Participants with new onset suicidality were those without suicidal ideation and behavior at baseline and reported any suicidal behavior or ideation post-baseline as assessed by C-CASA code mapped from C-SSRS data. Participants with worsening suicidality were those who moved to a lower numbered C-CASA category than was reported at baseline.

  6. Change From Baseline in Questionnaire for Impulsive-Compulsive Disorders in Parkinson's Disease - Rating Scale (QUIP-RS) Total Score at Days 35, 63, and 105 [ Time Frame: Baseline (Day -1 or randomization); Days 35, 63, 105 ]
    The QUIP-RS has 4 primary questions pertaining to commonly reported thoughts, urges/desires, and behaviors associated with impulsive-compulsive disorder , each applied to the 4 impulsive-compulsive disorders (compulsive gambling, buying, eating, and sexual behavior) and 3 related disorders (medication use, punding, and hobbyism). Each question is anchored with the following 5 responses: Never (0), Rarely (1), Sometimes (2), Often (3), and Very Often (4). The scoring range for each item (ie, disorder) is 0-16. The QUIP-RS total score range is 0-64. Higher score indicates a greater level of the impulsive compulsive disorder.

  7. Total Physician Withdrawal Checklist (PWC-20) Score [ Time Frame: Day 119 ]
    The PWC-20 is a 20-item reliable and sensitive instrument for the assessment of benzodiazepine-like discontinuation symptoms. The total PWC-20 score is the sum of 20 item scores and ranges between 0 and 60. The higher score indicates more frequent/severe symptoms.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   45 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Females of non-childbearing potential and/or male subjects
  • Clinical diagnosis of Parkinson's disease.
  • Parkinson's Disease Hoehn & Yahr Stage I-III inclusive
  • Treatment naïve or history of prior incidental treatment with dopaminergic agents for no more than 28 days
  • Able to refrain from any Parkinson's disease medication not permitted by the protocol.

Exclusion Criteria:

  • History or presence of atypical Parkinsonian syndrome.
  • Severe acute or chronic medical or psychiatric condition or cognitive impairment or laboratory abnormality.
  • Any condition possibly affecting drug absorption.
  • Participation in other studies involving investigational drug(s), or treatment with any investigational drug within 30 days.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02847650

Show Show 37 study locations
Sponsors and Collaborators
Layout table for investigator information
Study Director: Pfizer CT.gov Call Center Pfizer
  Study Documents (Full-Text)

Documents provided by Pfizer:
Study Protocol  [PDF] July 20, 2016
Statistical Analysis Plan  [PDF] August 4, 2016

Additional Information:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
Responsible Party: Pfizer
ClinicalTrials.gov Identifier: NCT02847650    
Other Study ID Numbers: B7601011
2016-001575-71 ( EudraCT Number )
First Posted: July 28, 2016    Key Record Dates
Results First Posted: January 15, 2019
Last Update Posted: November 23, 2020
Last Verified: October 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.
URL: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Pfizer:
Early Parkinson Disease
Phase 2
Additional relevant MeSH terms:
Layout table for MeSH terms
Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases