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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT01602549
Registration number
NCT01602549
Ethics application status
Date submitted
17/05/2012
Date registered
21/05/2012
Date last updated
6/02/2017
Titles & IDs
Public title
A Study to Assess the Effect of Repeat Doses of GSK962040 on the Pharmacokinetics of L-DOPA in Subjects With Parkinson's Disease Exhibiting Delayed Gastric Emptying
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Scientific title
A Randomized, Double-blind, Placebo-controlled, Parallel Group, Dose Ranging Study to Assess the Effect of Repeat Doses of GSK962040 on the Pharmacokinetics of L-DOPA in Subjects With Parkinson's Disease Exhibiting Delayed Gastric Emptying
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Secondary ID [1]
0
0
115816
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Gastroparesis
0
0
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Condition category
Condition code
Oral and Gastrointestinal
0
0
0
0
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Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon
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Neurological
0
0
0
0
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Other neurological disorders
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Neurological
0
0
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0
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Parkinson's disease
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Drugs - GSK962040 (25 mg tablet)
Treatment: Drugs - Placebo
Experimental: Cohort - 1:2 ratio, placebo, 50 mg administered orally once daily for 7-9 days
Treatment: Drugs: GSK962040 (25 mg tablet)
25 mg tablet
Treatment: Drugs: Placebo
matching placebo tablet
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Intervention code [1]
0
0
Treatment: Drugs
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Dose-normalized Levodopa (L-DOPA) Area Under the Plasma Concentration-time Curve From Zero to 4 Hours AUC(0-4) at Baseline
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Assessment method [1]
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Dose-normalized L-DOPA AUC(0-4) was derived from L-DOPA plasma concentration-time data. AUC is a measure of levodopa exposure.
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Timepoint [1]
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Baseline
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Primary outcome [2]
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Dose-normalized L-DOPA AUC(0-4) at Day 1 and Day 8
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Assessment method [2]
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Dose-normalized L-DOPA AUC(0-4) was derived from L-DOPA plasma concentration-time data. The adjusted means and ratios (GSK962040 50 mg: Placebo) were estimated using a mixed model fitting treatment, visit, treatment\*visit, Baseline L-dopa pharmacokinetic (PK) parameter, and Baseline gastric emptying half-time as fixed effects, and participant as a random effect. AUC is a measure of levodopa exposure
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Timepoint [2]
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Day 1 and Day 8
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Primary outcome [3]
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Dose-normalized L-DOPA Maximum Observed Concentration (Cmax) at Baseline
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Assessment method [3]
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Dose-normalized L-DOPA Cmax was derived from L-DOPA plasma concentration-time data.
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Timepoint [3]
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Baseline
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Primary outcome [4]
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Dose-normalized L-DOPA Cmax at Day 1 and Day 8
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Assessment method [4]
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Dose-normalized L-DOPA Cmax was derived from L-DOPA plasma concentration-time data. The adjusted means and ratios were estimated using a mixed model fitting treatment, visit, treatment\*visit, Baseline L-dopa PK parameter, and Baseline gastric emptying half-time as fixed effects, and participant as a random effect.
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Timepoint [4]
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Day 1 and Day 8
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Primary outcome [5]
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L-DOPA Time of Occurrence of Cmax (Tmax) at Baseline, Day 1,and Day 8
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Assessment method [5]
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L-DOPA Tmax was derived from L-DOPA plasma concentration-time data.
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Timepoint [5]
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Baseline, Day 1, and Day 8
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Primary outcome [6]
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L-DOPA Terminal Phase Half-life (t1/2) at Baseline, Day 1, and Day 8
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Assessment method [6]
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L-DOPA t1/2 was derived from L-DOPA plasma concentration-time data. This endpoint was not assessed because there were insufficient L-DOPA data/profiles to calculate this parameter.
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Timepoint [6]
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0
Baseline, Day 1, and Day 8
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Secondary outcome [1]
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Gastric Half Emptying Time (GE t1/2) at Baseline (BL), Day 1, and Day 8
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Assessment method [1]
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Gastric half emptying time is the time taken for half the contents of the stomach to empty. Gastric emptying was measured using the 13C-oral breath test, which is a tracer method that utilizes 13C, a non-radioactive isotope. Basal breath samples were obtained after an overnight fast or otherwise after 4 hours of fasting following a light meal. On Day 1 and Day 8, participants were then dosed with GSK962040 and additional breath test samples were taken prior to administration of a 13C-labelled test meal. The test meal was consumed approximately 80 minutes later. After consumption of the test meal, breath samples were collected at pre-specified time points over an approximately 4 hour period following the test meal. For the duration of the breath test, no food or drink were allowed. The 13C breath content was determined by isotope ratio mass spectrometry. GE t1/2 was determined by using the cumulative percentage of the administered dose of 13C excreted in breath over 4 hours.
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Timepoint [1]
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0
Baseline, Day 1, and Day 8
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Secondary outcome [2]
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Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Scores at Baseline, Day 1, and Day 8 (Pre-levodopa Dose)
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Assessment method [2]
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The MDS-UPDRS is used to assess the status of Parkinson's Disease. It has four parts: Part I (non-motor experiences of daily living), Part II (motor experiences of daily living), Part III (motor examination), and Part IV (motor complications). Each part is made up of several questions, with each question given a score ranging from 0 (normal) to 4 (severe). Part I and Part II consist of 13 items each, and have a score ranging between 0 (normal) and 52 (severe). Part III consists of 33 items, and has a score ranging between 0 (normal) and 132 (severe). Part IV consists of 6 items, and has a score ranging between 0 (normal) and 24 (severe). The total score is the summed score of all four parts and ranges between 0 (normal) and 260 (severe). A higher score indicates more severe symptoms.
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Timepoint [2]
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0
Baseline, Day 1, and Day 8 at pre-levodopa dose
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Secondary outcome [3]
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Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part III Scores at Baseline, Day 1, and Day 8 (Pre-dose; 120, 180, and 240 Minutes Post-dose)
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Assessment method [3]
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The MDS-UPDRS is used to assess the status of Parkinson's Disease. It has four parts: Part I (non-motor experiences of daily living), Part II (motor experiences of daily living), Part III (motor examination), and Part IV (motor complications). Each part is made up of several questions, with each question given a score ranging from 0 (normal) to 4 (severe). Part I and Part II consist of 13 items each, and have a score ranging between 0 (normal) and 52 (severe). Part III consists of 33 items, and has a score ranging between 0 (normal) and 132 (severe). Part IV consists of 6 items, and has a score ranging between 0 (normal) and 24 (severe). The total score is the summed score of all four parts and ranges between 0 (normal) and 260 (severe). A higher score indicates more severe symptoms.
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Timepoint [3]
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Baseline, Day 1, and Day 8 at pre-dose and 120, 180, and 240 minutes (min) post-dose (PD); Follow-up visit (up to Day 25)
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Secondary outcome [4]
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Period Mean Amount of Hours Spent "ON," "ON" Without Dyskinesia, "ON" With Non-troublesome Dyskinesia, "ON" With Troublesome Dyskinesia, and "OFF" at Baseline and During the Treatment Period (Days 1-8), Week 1 of Follow-up, and Week 2 of Follow-up
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Assessment method [4]
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Participants were provided with the "ON/OFF" diary to capture details of the amount of awake time spent on/off of PD symptoms, and were asked to complete the diary daily. Participants checked the box most appropriate for their dominant motor state in the preceding 30-minute period. The catergories included: "ON" (including "ON without dyskinesia" and "ON with non-troublesome dyskinesia"), "ON" with troublesome dyskinesia (TD), and "OFF." For Baseline, data were collected for 2 days prior to Day 1, and the mean value of the 2 days was used.
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Timepoint [4]
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Baseline, Days 1-8, Week 1 of Follow-up (Days 6 and 7 of Follow-up; up to Day 16), and Week 2 of Follow-up (Days 13 and 14 of Follow-up; up to Day 23)
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Secondary outcome [5]
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Number of Times a Participant Could Alternatively Tap Two Counter Keys 30 Centimeters Apart in 1 Minute (Min) at Baseline, Day1, Day 8, and Follow-up
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Assessment method [5]
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Participants were asked to alternatively tap two keys 30 centimeters apart in 1 minute in two trials with the most affected hand or the dominant hand in symmetric disease. The finger tapping was scored manually by the study staff. The finger-tapping assessment was repeated at eight separate time points (pre-dose, 0 min, 30 min, 60 min, 90 min, 120 min, 180 min, and 240 min post-dose) at each visit (Baseline, Day 1, and Day 8). At each time point, the mean of the two assessments was calculated.
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Timepoint [5]
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Baseline, Day 1, and Day 8 at pre-dose and 0, 30, 60, 90, 120, 180, and 240 minutes post-dose; Follow-up visit (up to Day 25)
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Secondary outcome [6]
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Total Daily L-DOPA Equivalent Dose at Baseline and on Days 1, 2, 3, 4, 5, 6, 7, 8, and 9
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Assessment method [6]
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Various formulations of L-DOPA were utilized by participants for the treatment of Parkinson's Disease. The total daily L-DOPA equivalent dose was calculated as the sum of all L-DOPA equivalent doses for each L-DOPA-containing drug taken on the same day.
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Timepoint [6]
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Baseline and Days 1, 2, 3, 4, 5, 6, 7, 8, and 9
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Secondary outcome [7]
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Change From Baseline in Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at Day 1 and Day 8
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Assessment method [7]
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Blood pressure measurements were taken at pre-dose and at 0 min (completion of meal) on Day 1 and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [7]
0
0
Baseline, Day 1, and Day 8
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Secondary outcome [8]
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Change From Baseline in Heart Rate at Day 1 and Day 8
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Assessment method [8]
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Heart rate measurements were taken at pre-dose and 0 min (completion of meal) on Day 1 and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [8]
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Baseline, Day 1, and Day 8
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Secondary outcome [9]
0
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Number of Participants With the Indicated Electrocardiogram (ECG) Findings at Day 1 and Day 8
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Assessment method [9]
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ECG measurements were taken at pre-dose and 0 min (completion of meal) on Day 1 and Day 8. The Baseline value was the Day 1 pre-dose value. ECG findings were categorized as normal, abnormal - not clinically significant, and abnormal - clinically significant (CS), based on interpretation by the site.
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Timepoint [9]
0
0
Day 1 and Day 8
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Secondary outcome [10]
0
0
Change From Baseline in Albumin (ALB) and Total Protein (TP) at Day 4 and Day 8
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Assessment method [10]
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ALB and TP measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [10]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [11]
0
0
Change From Baseline in Alkaline Phosphatase (ALP), Alanine Amino Transferase (ALT), Aspartate Amino Transferase (AST), and Gamma Glutamyl Transferase (GGT) at Day 4 and Day 8
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Assessment method [11]
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ALP, ALT, AST, and GGT measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [11]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [12]
0
0
Change From Baseline in Calcium, Chloride, Carbon Dioxide Content (CO2)/Bicarbonate (BC), Glucose, Potassium, Sodium, Urea/Blood Urea Nitrogen (BUN), and Uric Acid (UA) at Day 4 and Day 8
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Assessment method [12]
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Calcium, chloride, CO2/BC, glucose, potassium, sodium, urea/BUN, and UA measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [12]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [13]
0
0
Change From Baseline in Basophils, Eosinophils, Lymphocytes, Monocytes, Total Absolute Neutrophil Count (ANC), and Platelet Count (PC) at Day 4 and Day 8
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Assessment method [13]
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Basophils, eosinophils, lymphocytes, monocytes, total ANC, and PC measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [13]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [14]
0
0
Change From Baseline in Hemoglobin and Mean Corpuscle Hemoglobin Concentration (MCHC) at Day 4 and Day 8
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Assessment method [14]
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Hemoglobin and MCHC measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [14]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [15]
0
0
Change From Baseline in Hematocrit at Day 4 and Day 8
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Assessment method [15]
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Hematocrit measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [15]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [16]
0
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Change From Baseline in Mean Corpuscle Hemoglobin (MCH) at Day 4 and Day 8
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Assessment method [16]
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MCH measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [16]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [17]
0
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Change From Baseline in Mean Corpuscle Volume (MCV) at Day 4 and Day 8
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Assessment method [17]
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MCV measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [17]
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Baseline, Day 4, and Day 8
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Secondary outcome [18]
0
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Change From Baseline in Red Blood Cell Count (RBC) and White Blood Cell Count (WBC) at Day 4 and Day 8
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Assessment method [18]
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RBC and WBC measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [18]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [19]
0
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Change From Baseline in Reticulocytes (RET) at Day 4 and Day 8
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Assessment method [19]
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RET measurements were taken at pre-dose on Day 1 (Baseline), Day 4, and Day 8. The Baseline value was the Day 1 pre-dose value. Change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline value.
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Timepoint [19]
0
0
Baseline, Day 4, and Day 8
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Secondary outcome [20]
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Number of Participants With Any Adverse Event (AE) or Serious Adverse Event (SAE)
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Assessment method [20]
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An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability or incapacity, is a congenital anomaly or birth defect, is associated with liver injury and impaired liver function, or are serious events as per the medical or scientific judgment.
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Timepoint [20]
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From the start of study medication until Follow-up (up to Day 25)
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Secondary outcome [21]
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GSK962040 Area Under the Plasma Concentration-time Curve From Zero to 5.5 Hours (AUC[0-5.5] and Area Under the Plasma Concentration-time Curve From Zero to Infinity (AUC[0-inf]) at Days 1 and 8
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Assessment method [21]
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GSK AUC(0-5.5) and AUC(0-inf) were derived from GSK962040 plasma concentration-time data. Only participants who received GSK962040 50 mg were analyzed. AUC is a measure of levodopa exposure. Data for AUC(0-inf) was analyzed and was only available for Day 1 and not for Day 8.
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Timepoint [21]
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Day 1 and Day 8
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Secondary outcome [22]
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GSK962040 Percentage of AUC(0-inf) Obtained by Extrapolation (%AUCex) at Day 1
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Assessment method [22]
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GSK962040 %AUCex was derived from GSK962040 plasma concentration-time data. %AUCex is the percentage of the AUC(0-inf) extrapolated from the last PK sample drawn to infinity. This parameter is only reported in conjunction with single-dose AUC(0-inf). Only participants who received GSK962040 50 mg were analyzed. AUC is a measure of levodopa exposure.
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Timepoint [22]
0
0
Day 1
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Secondary outcome [23]
0
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GSK962040 Cmax at Day1 and Day 8
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Assessment method [23]
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GSK962040 Cmax was derived from GSK962040 plasma concentration-time data. Only participants who received GSK962040 50 mg were analyzed.
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Timepoint [23]
0
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Day 1 and Day 8
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Secondary outcome [24]
0
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GSK962040 Tmax at Day1 and Day 8
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Assessment method [24]
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GSK962040 tmax was derived from GSK962040 plasma concentration-time data. Only participants who received GSK962040 50 mg were analyzed.
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Timepoint [24]
0
0
Day 1 and Day 8
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Eligibility
Key inclusion criteria
* Diagnosis of idiopathic Parkinson's Disease (according to modified Hoehn & Yahr criteria Stages II-IV) and with suboptimal motor control on L-DOPA or L-DOPA combination therapy (i.e. wearing off, peak dose dyskinesias, delayed on or no-on effects)
* Subjects receiving a stable regimen of L-DOPA for at least four weeks prior to screening
* Patient has gastric half-time of emptying > or = 70 min as determined by 13C oral breath test
* Between 40 and 80 years of age, inclusive.
* Patient has never had a gastrectomy, nor major gastric surgical procedure or any evidence of bowel obstruction or strictures within the previous 12 months
* Dosage of any concomitant medications has been stable for at least 4 weeks
* A female subject is eligible to participate if she is of: Non-childbearing potential defined as pre-menopausal females with a documented tubal ligation or hysterectomy; or postmenopausal defined as 12 months of spontaneous amenorrhea [in questionable cases a blood sample with simultaneous follicle stimulating hormone (FSH) > 40 MlU/ml and estradiol < 40 pg/ml (<147 pmol/L) is confirmatory]. Child-bearing potential and is abstinent or agrees to use one of the contraception methods listed in Section 8.1 for an appropriate period of time (as determined by the product label or investigator) prior to the start of dosing to sufficiently minimize the risk of pregnancy at that point. Female subjects must agree to use contraception until at least 5 days post-last dose.
* ALT < 2xULN; alkaline phosphatase and bilirubin = 1.5xULN (isolated bilirubin >1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin <35%).
* Single or Average QTc, QTcB or QTcF< 450 msec; or QTc < 480 msec in subjects with Bundle Branch Block.
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Minimum age
40
Years
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Maximum age
80
Years
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
* Late stage advanced subjects with incapacitating peak dose or biphasic dyskinesia ona stable L-DOPA regime.
* Presence, or history within the previous 3 months, of significant and/or uncontrolled psychiatric, neurological (other than Parkinson's disease), gastro-intestinal, hematological, endocrinologic, neurological (other than Parkinson's disease), cardiovascular disease, active malignancy (other than basal cell cancer) or other condition that would in the opinion of the investigator or medical monitor make the subject unsuitable for inclusion in this clinical study.
* A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 months of screening
* Patient has a gastric pacemaker
* Patient is on chronic enteral (e.g., feeding tube) or parenteral feeding
* Patient has evidence of severe cardiovascular autonomic neuropathy (e.g. history of recurrent syncope in the last 6 months)
* Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones).
* Pregnant females as determined by positive serum or urine hCG test at screening or prior to dosing.
* Lactating females.
* Unable to refrain from consumption of red wine, Seville oranges, grapefruit or grapefruit juice from 7 days prior to the first dose of study medication until followup.
* Use of medications potentially influencing upper gastrointestinal motility or appetite within one week of the study (e.g., prokinetic drugs, macrolide antibiotics (erythromycin), GLP-1 mimetics)
* Unable to refrain from use of prohibited medications listed in Section 9 within the restricted timeframe relative to the first dose of study medication.
* The patient has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
* History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation.
* Where participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56-day time-period.
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Study design
Purpose of the study
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people analysing the results/data
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Intervention assignment
Parallel
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Other design features
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Phase
Phase 2
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/07/2012
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
1/05/2014
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Sample size
Target
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Accrual to date
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Final
58
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Recruitment in Australia
Recruitment state(s)
NSW
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Recruitment hospital [1]
0
0
GSK Investigational Site - Randwick
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Recruitment postcode(s) [1]
0
0
2031 - Randwick
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Recruitment outside Australia
Country [1]
0
0
Germany
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State/province [1]
0
0
Baden-Wuerttemberg
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Country [2]
0
0
Germany
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State/province [2]
0
0
Nordrhein-Westfalen
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Country [3]
0
0
Germany
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State/province [3]
0
0
Thueringen
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Country [4]
0
0
Germany
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State/province [4]
0
0
Berlin
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Country [5]
0
0
Sweden
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State/province [5]
0
0
Uppsala
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Country [6]
0
0
United Kingdom
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State/province [6]
0
0
Cambridge
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Country [7]
0
0
United Kingdom
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State/province [7]
0
0
Newcastle Upon Tyne
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Country [8]
0
0
United Kingdom
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State/province [8]
0
0
Norwich
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Funding & Sponsors
Primary sponsor type
Commercial sector/industry
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Name
GlaxoSmithKline
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
Gastric emptying is the end-result of a complex and carefully regulated series of events which follow the ingestion of a meal, each of which is dependent on the other and subject to neurohormonal control. Motilin is an endogenous peptide, produced mainly in the duodenum, whose physiological action is mediated by motilin receptors located on enteric neurons, peripheral terminals of the vagus, and on the smooth muscle of the gut. Motilin and non-peptide agonists at motilin receptors increases the gastric emptying rate and therefore provide a potential approach to the treatment of a range of clinical conditions in which delayed gastric emptying is thought to be part of the physiopathology and may be contributory to symptoms. Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by degeneration of nigrostriatal dopaminergic neurones. It affects 1.5% of the global population over 65 years of age. Cardinal symptoms comprise bradykinesia, rigidity, resting tremors and postural instability. Gastrointestinal dysfunction, including gastroparesis, is a frequent feature of PD affecting approximately 90% of patients, and is caused by autonomic dysfunction as well as an adverse effect of antiparkinsonian drug therapy. The therapeutic mainstay for PD treatment is the neutral amino acid L-3,4-dihydroxyphenylalanine (L-DOPA), a dopamine prodrug, as it provides the most rapid and effective symptomatic control of motor impairment in PD. The primary determinant of L-DOPA bioavailability is gastric emptying (GE); delays in GE slow delivery of L-DOPA to its proximal small intestinal absorption sites, increasing the extent of presystemic metabolism, and leading to slowed and diminished absorption.
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Trial website
https://clinicaltrials.gov/study/NCT01602549
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Trial related presentations / publications
Marrinan SL, Otiker T, Vasist LS, Gibson RA, Sarai BK, Barton ME, Richards DB, Hellstrom PM, Nyholm D, Dukes GE, Burn DJ. A randomized, double-blind, placebo-controlled trial of camicinal in Parkinson's disease. Mov Disord. 2018 Feb;33(2):329-332. doi: 10.1002/mds.27259. Epub 2017 Dec 26.
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GSK Clinical Trials
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GlaxoSmithKline
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Results are available at
https://clinicaltrials.gov/study/NCT01602549
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