Phase 1
Completed N=50
Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of PF-06649751 in Parkinson's Disease
Source: ClinicalTrials.gov NCT02224664 ↗Enrolled (actual)
50
Serious AEs
1.1%
Results posted
Mar 2017
Primary outcomePrimary: Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs) — 9; 9; 7; 5 participants
Summary
This study will be an open label, dose escalation study to investigate the safety, tolerability, pharmacokinetics and pharmacodynamics of repeated daily quaque die (QD) doses given over 21 days (Day 3 to Day 23) to sequential cohorts of subjects with Parkinson's disease. Each cohort will have 2 study periods. For each cohort, subjects will enter Period 1 and if they meet criteria, approximately 12 subjects will be enrolled into Period 2 and dosed with PF 06649751. Based on results observed in a previous study, Cohorts 1 and 2 will not be conducted. Cohorts 3 - 6 will test doses uptitrated to 5 mg, 15 mg and 25 mg QD. Doses may be modified based on emerging safety, tolerability and PK data, but the maximum daily dose that will be given in any cohort will have PK predictions at steady state that are anticipated to be below toxicokinetic limits. An option for down titration to the previous dose level is available should the investigator consider that an AE is intolerable. Following down titration, a single up titration to the next dose level may be attempted if the subject remains symptom free for at least 48 hrs. Safety, tolerability and PK data of Cohort 3 will be reviewed prior to initiating the dosing in Cohorts 4 and 5. Available safety, tolerability and PK data up to Day 24 of at least 5 subjects from Cohorts 4 will be reviewed prior to initiating the dosing in Cohort 6.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs) |
9; 9; 7; 5; 15; 0 | — |
| PRIMARY Number of Participants With Laboratory Test Abnormalities |
17; 8; 8; 5; 11 | — |
| PRIMARY Number of Participants With Vital Sign Abnormalities |
2; 1; 1; 1; 1; 5 | — |
| PRIMARY Number of Participants With Electrocardiogram (ECG) Abnormalities |
2; 0; 2; 1; 2 | — |
| PRIMARY Number of Participants With Clinically Significant Change From Baseline in Physical Examination Findings |
0; 0; 0; 0; 0 | — |
| PRIMARY Number of Participants With Clinically Significant Neurological Examination Abnormality |
0; 0; 0; 0; 1 | — |
| PRIMARY Number of Participants With Categorical Scores on The Columbia Suicide Severity Rating Scale (C-SSRS) |
0; 0; 0; 0 | — |
| PRIMARY Change From Baseline in Parkinson's Disease Diary For Participants With Motor Fluctuations at Day 13 |
4.42; 6.18; 6.75; 6.05; -0.14; -0.31 | — |
| PRIMARY Change From Baseline in Parkinson's Disease Diary For Participants With Motor Fluctuations at Day 20 |
1.97; -0.19; 0.63; -1.94; -1.53; 0.69 | — |
| SECONDARY Maximum Observed Plasma Concentration (Cmax) of L-Dopa |
2817 | — |
| SECONDARY Time to Reach Maximum Observed Plasma Concentration (Tmax) of L-Dopa |
0.517 | — |
| SECONDARY Apparent Clearance (CL/F) of L-Dopa |
33.57 | — |
| SECONDARY Terminal Half-Life (t1/2) of L-Dopa |
1.534 | — |
| SECONDARY Area Under the Curve From Time Zero Extrapolated to Infinite Time of L-Dopa |
6117 | — |
| SECONDARY Area Under the Curve From Time Zero to Last Quantifiable Concentration of L-Dopa |
6152 | — |
| SECONDARY Apparent Volume of Distribution (Vz/F) of L-Dopa |
73.41 | — |
| SECONDARY Maximum Observed Plasma Concentration (Cmax) of PF-06649751 |
18.95; 53.69; 31.72; 68.17; 79.87; 215.7 | — |
| SECONDARY Time to Reach Maximum Observed Plasma Concentration (Tmax) of PF-06649751 |
1.00; 2.45; 2.00; 3.18; 2.00; 3.92 | — |
| SECONDARY Apparent Clearance (CL/F) of PF-06649751 |
2.377; 2.504; 3.511; 3.483 | — |
| SECONDARY Area Under the Curve From Time Zero to End of Dosing Interval of PF-06649751 |
261.9; 990.8; 530.9; 1203; 1438; 4192 | — |
| SECONDARY Minimum Observed Plasma Trough Concentration (Cmin) of PF-06649751 |
7.295; 27.97; 14.19; 24.29; 35.00; 132.5 | — |
| SECONDARY Ratio of Accumulation for Area Under the Curve From Time Zero to End of Dosing Interval of PF-06649751 |
— | — |
Eligibility Criteria
Inclusion Criteria
- Clinical diagnosis of idiopathic Parkinson's Disease with at least 2 out of 3 cardinal characteristics (tremor, rigidity, bradykinesia)
- Mini-Mental State Examination (MMSE) ≥ 25
- Hoehn & Yahr Stage I-III inclusive
- Documented history of end of L-Dopa wearing OFF
- Cohort 5 only: History of dyskinesia following L-Dopa dosing and Score of at least 2 on Part IV, item 4.2 (functional impact of dyskinesia) of the MDS-UPDRS
Exclusion Criteria
- Atypical/secondary parkinsonism
- History of surgical intervention for Parkinson's Disease
- Dementia/cognitive impairment that can interfere with study assessments
Data sourced from ClinicalTrials.gov (NCT02224664). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.