Trial Outcomes & Findings for A Study of Ataluren in Pediatric Participants With Cystic Fibrosis (NCT NCT00458341)

NCT ID: NCT00458341

Last Updated: 2020-03-06

Results Overview

Nasal transepithelial potential difference (TEPD) was assessed in each participant using standardized techniques. Warmed solutions of Ringer's solution, amiloride, chloride-free gluconate, isoproterenol, and adenosine triphosphate (ATP) were perfused for ≥3-minute sequentially through a nasal catheter while a voltage tracing was recorded. Total chloride transport was computed for each nostril. The total chloride transport values were calculated by subtracting the voltages at the end of a perfusion from the voltage at the end of an earlier perfusion (isoproterenol - amiloride). The average of the values for each nostril was computed. If the assessment was available in only 1 nostril, this value was used as if it were the average of both nostrils. Baseline data for Cycle 1 and Cycle 2 and change from Baseline data at Day 14 of Cycles 1 and 2 are presented.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

30 participants

Primary outcome timeframe

Baseline of Cycle 1 and Cycle 2, Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days)

Results posted on

2020-03-06

Participant Flow

Participants were randomized so that half received the lower-dose level in Cycle 1 and then the higher-dose level in Cycle 2 (low-to-high dose sequence) and half received the higher-dose level in Cycle 1 and then the lower-dose level in Cycle 2 (high-to-low dose sequence).

Participant milestones

Participant milestones
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
During Cycle 1, participants received ataluren at 4 milligrams (mg/kg) in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Cycle 1
STARTED
15
15
Cycle 1
Received at Least 1 Dose of Study Drug
15
15
Cycle 1
COMPLETED
14
15
Cycle 1
NOT COMPLETED
1
0
Cycle 2
STARTED
15
15
Cycle 2
Received at Least 1 Dose of Study Drug
15
15
Cycle 2
COMPLETED
15
15
Cycle 2
NOT COMPLETED
0
0

Reasons for withdrawal

Reasons for withdrawal
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
During Cycle 1, participants received ataluren at 4 milligrams (mg/kg) in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Cycle 1
Adverse Event
1
0

Baseline Characteristics

A Study of Ataluren in Pediatric Participants With Cystic Fibrosis

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Total
n=30 Participants
Total of all reporting groups
Age, Continuous
12 years
STANDARD_DEVIATION 3.53 • n=93 Participants
13 years
STANDARD_DEVIATION 3.38 • n=4 Participants
12.5 years
STANDARD_DEVIATION 3.43 • n=27 Participants
Sex: Female, Male
Female
6 Participants
n=93 Participants
8 Participants
n=4 Participants
14 Participants
n=27 Participants
Sex: Female, Male
Male
9 Participants
n=93 Participants
7 Participants
n=4 Participants
16 Participants
n=27 Participants

PRIMARY outcome

Timeframe: Baseline of Cycle 1 and Cycle 2, Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days)

Population: All randomized participants who received at least 1 dose of study drug and had evaluable chloride transport data.

Nasal transepithelial potential difference (TEPD) was assessed in each participant using standardized techniques. Warmed solutions of Ringer's solution, amiloride, chloride-free gluconate, isoproterenol, and adenosine triphosphate (ATP) were perfused for ≥3-minute sequentially through a nasal catheter while a voltage tracing was recorded. Total chloride transport was computed for each nostril. The total chloride transport values were calculated by subtracting the voltages at the end of a perfusion from the voltage at the end of an earlier perfusion (isoproterenol - amiloride). The average of the values for each nostril was computed. If the assessment was available in only 1 nostril, this value was used as if it were the average of both nostrils. Baseline data for Cycle 1 and Cycle 2 and change from Baseline data at Day 14 of Cycles 1 and 2 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Total Chloride Transport at Day 14 of Cycles 1 and 2
Baseline of Cycle 1
1.45 millivolts (mV)
Standard Deviation 5.671
0.66 millivolts (mV)
Standard Deviation 4.563
Change From Baseline in Total Chloride Transport at Day 14 of Cycles 1 and 2
Change at Day 14 of Cycle 1
-2.81 millivolts (mV)
Standard Deviation 6.543
-2.69 millivolts (mV)
Standard Deviation 7.289
Change From Baseline in Total Chloride Transport at Day 14 of Cycles 1 and 2
Baseline of Cycle 2
-0.92 millivolts (mV)
Standard Deviation 4.474
-3.76 millivolts (mV)
Standard Deviation 6.729
Change From Baseline in Total Chloride Transport at Day 14 of Cycles 1 and 2
Change at Day 14 of Cycle 2
-2.39 millivolts (mV)
Standard Deviation 5.426
1.10 millivolts (mV)
Standard Deviation 7.179

PRIMARY outcome

Timeframe: Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days)

Population: All randomized participants who received at least 1 dose of study drug and had evaluable chloride transport response data.

Nasal TEPD was assessed in each participant using standardized techniques. Warmed solutions of Ringer's solution, amiloride, chloride-free gluconate, isoproterenol, and ATP were perfused for ≥3-minute sequentially through a nasal catheter while a voltage tracing was recorded. Total chloride transport was computed for each nostril. The total chloride transport values were calculated by subtracting the voltages at the end of a perfusion from the voltage at the end of an earlier perfusion (isoproterenol - amiloride). The average of the values for each nostril was computed. If the assessment was available in only 1 nostril, this value was used as if it were the average of both nostrils. Response to study treatment defined as an increase in total chloride transport as indicated by a change of at least -5 mV in nasal TEPD.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Number of Participants With a Chloride Transport Response at Day 14 of Cycles 1 and 2
Day 14 of Cycle 1
4 Participants
4 Participants
Number of Participants With a Chloride Transport Response at Day 14 of Cycles 1 and 2
Day 14 of Cycle 2
4 Participants
2 Participants

PRIMARY outcome

Timeframe: Overall Baseline and Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days)

Population: All randomized participants who received at least 1 dose of study drug and had evaluable normalization of chloride transport data.

Nasal TEPD was assessed in each participant using standardized techniques. Warmed solutions of Ringer's solution, amiloride, chloride-free gluconate, isoproterenol, and ATP were perfused for ≥3-minute sequentially through a nasal catheter while a voltage tracing was recorded. Total chloride transport was computed for each nostril. The total chloride transport values were calculated by subtracting the voltages at the end of a perfusion from the voltage at the end of an earlier perfusion (isoproterenol - amiloride). The average of the values for each nostril was computed. If the assessment was available in only 1 nostril, this value was used as if it were the average of both nostrils. Normalization of chloride transport (normal range \[NR\]) was defined as nasal TEPD that was at least as electrically negative as -5 mV. Normalization in chloride transport can also be referred to as hyperpolarization.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=14 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=14 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Within NR at Baseline of Cycle 1
0 Participants
0 Participants
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Within NR at Day 14 of Cycle 1
1 Participants
5 Participants
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Outside NR at Baseline/in NR at Day 14 of Cycle 1
1 Participants
5 Participants
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Within NR at Baseline of Cycle 2
2 Participants
4 Participants
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Within NR at Day 14 of Cycle 2
6 Participants
3 Participants
Number of Participants With Normalization of Chloride Transport Between Baseline and Day 14 of Cycles 1 and 2
Outside NR at Baseline/in NR at Day 14 of Cycle 2
6 Participants
2 Participants

SECONDARY outcome

Timeframe: Baseline of Cycle 1 and Cycle 2, Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days)

Population: All randomized participants who received at least 1 dose of study drug and had evaluable transepithelial difference data.

To assess TEPD, warmed solutions of Ringer's solution, amiloride, chloride-free gluconate, isoproterenol and ATP were perfused for ≥3-minutes sequentially through a nasal catheter while a voltage tracing was recorded. Total chloride transport was computed per nostril. Totals were calculated by subtracting voltages at end of perfusion from voltage at end of earlier perfusion for: sodium transport (amiloride-Ringer's solution), intrinsic chloride transport (chloride-free gluconate-amiloride), stimulated chloride transport (isoproterenol-chloride-free gluconate), total potential difference (isoproterenol-Ringer's solution), and ATP-mediated chloride transport (ATP-isoproterenol). Basal potential difference voltage was obtained at end of Ringer's solution perfusion. Average values per nostril were computed. If assessment was available in only 1 nostril, the value was used as if it's the average of both nostrils. Baseline data for Cycles 1 and 2 and change from Baseline data are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Sodium transport, Baseline of C2
28.85 mV
Standard Deviation 14.31
32.15 mV
Standard Deviation 17.72
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Sodium transport, Change at D14 of C2
6.38 mV
Standard Deviation 19.81
5.50 mV
Standard Deviation 20.69
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Intrinsic chloride transport, Baseline of C1
2.38 mV
Standard Deviation 4.19
1.11 mV
Standard Deviation 4.01
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Intrinsic chloride transport, Change at D14 of C1
-2.54 mV
Standard Deviation 4.70
-2.69 mV
Standard Deviation 4.96
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Intrinsic chloride transport, Baseline of C2
-1.32 mV
Standard Deviation 5.61
-0.90 mV
Standard Deviation 3.44
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Intrinsic chloride transport, Change at D14 of C2
-1.20 mV
Standard Deviation 6.23
-1.12 mV
Standard Deviation 5.34
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Stimulated chloride transport, Baseline of C1
-0.93 mV
Standard Deviation 2.22
-0.45 mV
Standard Deviation 1.63
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Stimulated chloride transport, Change at D14 of C1
-0.27 mV
Standard Deviation 3.44
0 mV
Standard Deviation 4.26
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Stimulated chloride transport, Baseline of C2
0.40 mV
Standard Deviation 4.83
-2.86 mV
Standard Deviation 6.98
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Stimulated chloride transport, Change at D14 of C2
-1.19 mV
Standard Deviation 5.89
2.21 mV
Standard Deviation 8.77
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Total potential difference, Baseline of C1
35.83 mV
Standard Deviation 17.25
37.06 mV
Standard Deviation 17.25
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Total potential difference, Change at D14 of C1
-7.77 mV
Standard Deviation 12.16
-1.14 mV
Standard Deviation 13.89
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Total potential difference, Baseline of C2
27.93 mV
Standard Deviation 15.37
28.39 mV
Standard Deviation 17.18
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Total potential difference, Change at D14 of C2
3.99 mV
Standard Deviation 19.48
6.59 mV
Standard Deviation 20.20
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
ATP-mediated chloride transport, Baseline C1
-19.84 mV
Standard Deviation 10.22
-17.65 mV
Standard Deviation 10.62
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
ATP-mediated chloride transport, Change at D14, C1
4.93 mV
Standard Deviation 11.56
-2.95 mV
Standard Deviation 15.59
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
ATP-mediated chloride transport, Baseline C2
-16.87 mV
Standard Deviation 13.24
-16.34 mV
Standard Deviation 12.35
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
ATP-mediated chloride transport, Change at D14, C2
-0.38 mV
Standard Deviation 17.47
-4.58 mV
Standard Deviation 27.93
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Basal nasal TEPD, Baseline of Cycle (C)1
-53.91 mV
Standard Deviation 18.81
-56.51 mV
Standard Deviation 20.68
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Basal nasal TEPD, Change at Day (D)14 of C1
9.31 mV
Standard Deviation 17.72
-3.70 mV
Standard Deviation 13.33
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Basal nasal TEPD, Baseline of C2
-46.28 mV
Standard Deviation 14.46
-50.02 mV
Standard Deviation 17.09
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Basal nasal TEPD, Change at D14 of C2
-6.31 mV
Standard Deviation 19.33
-5.22 mV
Standard Deviation 24.48
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Sodium transport, Baseline of C1
34.38 mV
Standard Deviation 17.72
36.40 mV
Standard Deviation 18.44
Change From Baseline in Parameters of Transepithelial Difference at Day 14 of Cycles 1 and 2
Sodium transport, Change at D14 of C1
-4.97 mV
Standard Deviation 15.30
1.55 mV
Standard Deviation 18.39

SECONDARY outcome

Timeframe: Overall Baseline, Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable apical cell data.

The immunofluorescence staining of normal epithelial cells (for example, from nasal mucosal curettage) reveals the presence of cystic fibrosis transmembrane regulator (CFTR) protein at the apical surface. Cells were stained with antibodies that recognized an epitope in the C-terminal portion of the CFTR protein, and the cells were imaged microscopically. The percentage of epithelial cells that showed apical CFTR staining was determined by 2 expert readers who were blinded to the timepoint at which the samples were obtained. The scores of the reviewers were averaged to determine the final percentage of cells with apical CFTR. Overall Baseline data for the study and change from overall Baseline data at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in CFTR Protein in Nasal Mucosa as Determined by Immunofluorescence at Overall Day 56
Overall Baseline
15.95 percentage of apical cells
Standard Deviation 16.797
10.47 percentage of apical cells
Standard Deviation 9.270
Change From Baseline in CFTR Protein in Nasal Mucosa as Determined by Immunofluorescence at Overall Day 56
Change at Overall Day 56
10.45 percentage of apical cells
Standard Deviation 24.337
22.89 percentage of apical cells
Standard Deviation 29.389

SECONDARY outcome

Timeframe: Overall Baseline, Overall Day 42

Population: All randomized participants who received at least 1 dose of study drug and had evaluable CFTR mRNA data.

The collection and processing of the nasal mucosal curettage from each nostril of each participant for measurement of CFTR protein by immunofluorescence and for quantification of CFTR messenger ribonucleic acid (mRNA) was performed using standardized techniques. The slides were processed and immunostained for detection of CFTR protein. Microscopic images were to be captured photographically for analysis. Because the nasal brushing used to collect nasal mucosal epithelial cells did not result in collection of sufficient cells for RT-PCR to be performed, an insufficient number of paired baseline and follow-up samples were available for analysis. As a result, no data were available to evaluate the effects of ataluren on CFTR mRNA.

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable pulmonary function data.

Pulmonary function tests, including forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), and forced expiratory flow25-75 (FEF25-75), were measured using standard spirometry techniques. Overall Baseline data for the study and change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEV1, Overall Baseline
92.68 percent of predicted
Standard Deviation 22.645
85.14 percent of predicted
Standard Deviation 27.850
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEV1, Change at Day 14 or 15 of Cycle 1
2.73 percent of predicted
Standard Deviation 5.848
-4.60 percent of predicted
Standard Deviation 7.579
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEV1, Change at Day 14 or 15 of Cycle 2
-0.46 percent of predicted
Standard Deviation 11.031
0.02 percent of predicted
Standard Deviation 8.801
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEV1, Change at Overall Day 56
-0.36 percent of predicted
Standard Deviation 12.936
-0.39 percent of predicted
Standard Deviation 8.191
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FVC, Overall Baseline
101.83 percent of predicted
Standard Deviation 13.294
95.34 percent of predicted
Standard Deviation 22.515
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FVC, Change at Day 14 or 15 of Cycle 1
2.52 percent of predicted
Standard Deviation 7.216
-2.33 percent of predicted
Standard Deviation 6.643
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FVC, Change at Day 14 or 15 of Cycle 2
-0.44 percent of predicted
Standard Deviation 7.433
-0.44 percent of predicted
Standard Deviation 7.433
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FVC, Change at Overall Day 56
-0.65 percent of predicted
Standard Deviation 9.117
1.02 percent of predicted
Standard Deviation 6.796
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEF 25-75%, Overall Baseline
88.32 percent of predicted
Standard Deviation 49.740
71.20 percent of predicted
Standard Deviation 41.194
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEF 25-75%, Change at Day 14 or 15 of Cycle 1
2.98 percent of predicted
Standard Deviation 19.679
-3.63 percent of predicted
Standard Deviation 12.300
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEF 25-75%, Change at Day 14 or 15 of Cycle 2
3.19 percent of predicted
Standard Deviation 22.712
-0.39 percent of predicted
Standard Deviation 19.192
Change From Baseline in Pulmonary Function as Measured by Spirometry at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
FEF 25-75%, Change at Overall Day 56
-2.76 percent of predicted
Standard Deviation 27.406
-4.29 percent of predicted
Standard Deviation 23.379

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable sputum markers of inflammation data.

The inflammatory marker free elastase was measured in induced sputum from each participant. Hypertonic saline (3%) inhalation was used to induce the sputum (with efforts made to avoid oropharyngeal contamination). The sputum sample was divided into 4 aliquots (1 aliquot each for determination of cell count, IL-8 level, and elastase activity and 1 aliquot for potential future viscosity measurements). Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Sputum Markers of Inflammation (Free Elastase) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Free Elastase, Baseline
108.85 micrograms/milliliters (μg/mL)
Standard Deviation 107.617
60.92 micrograms/milliliters (μg/mL)
Standard Deviation 56.170
Change From Baseline in Sputum Markers of Inflammation (Free Elastase) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Free Elastase, Change at Day 14 or 15 of Cycle 1
-37.78 micrograms/milliliters (μg/mL)
Standard Deviation 95.154
74.66 micrograms/milliliters (μg/mL)
Standard Deviation 83.258
Change From Baseline in Sputum Markers of Inflammation (Free Elastase) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Free Elastase, Change at Day 14 or 15 of Cycle 2
-24.40 micrograms/milliliters (μg/mL)
Standard Deviation 93.804
37.33 micrograms/milliliters (μg/mL)
Standard Deviation 65.240
Change From Baseline in Sputum Markers of Inflammation (Free Elastase) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Free Elastase, Change at Overall Day 56
12.47 micrograms/milliliters (μg/mL)
Standard Deviation 84.427
57.18 micrograms/milliliters (μg/mL)
Standard Deviation 139.211

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable sputum markers of inflammation data.

The inflammatory marker MMP-9 active was measured in induced sputum from each participant. Hypertonic saline (3%) inhalation was used to induce the sputum (with efforts made to avoid oropharyngeal contamination). The sputum sample was divided into 4 aliquots (1 aliquot each for determination of cell count, IL-8 level, and elastase activity and 1 aliquot for potential future viscosity measurements). Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Sputum Markers of Inflammation (Matrix Metalloproteinase 9 [MMP-9] Active) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
MMP-9 Active, Baseline
69431.28 nanograms/milliliter (ng/mL)
Standard Deviation 109894.966
20908.56 nanograms/milliliter (ng/mL)
Standard Deviation 28441.612
Change From Baseline in Sputum Markers of Inflammation (Matrix Metalloproteinase 9 [MMP-9] Active) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
MMP-9 Active, Change at Day 14 or 15 of Cycle 1
-44527.45 nanograms/milliliter (ng/mL)
Standard Deviation 92493.455
71639.89 nanograms/milliliter (ng/mL)
Standard Deviation 150716.037
Change From Baseline in Sputum Markers of Inflammation (Matrix Metalloproteinase 9 [MMP-9] Active) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
MMP-9 Active, Change at Day 14 or 15 of Cycle 2
-51330.37 nanograms/milliliter (ng/mL)
Standard Deviation 108057.265
14947.54 nanograms/milliliter (ng/mL)
Standard Deviation 69337.080
Change From Baseline in Sputum Markers of Inflammation (Matrix Metalloproteinase 9 [MMP-9] Active) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
MMP-9 Active, Change at Overall Day 56
-49644.49 nanograms/milliliter (ng/mL)
Standard Deviation 86334.812
56884.39 nanograms/milliliter (ng/mL)
Standard Deviation 158498.793

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable sputum markers of inflammation data.

The inflammatory markers TNF-α, IL-8, and TGF-β1 were measured in induced sputum from each participant. Hypertonic saline (3%) inhalation was used to induce the sputum (with efforts made to avoid oropharyngeal contamination). The sputum sample was divided into 4 aliquots (1 aliquot each for determination of cell count, IL-8 level, and elastase activity and 1 aliquot for potential future viscosity measurements). Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
IL-8, Baseline
352539.57 picograms/milliliter (pg/mL)
Standard Deviation 331865.227
121879.75 picograms/milliliter (pg/mL)
Standard Deviation 83684.594
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
IL-8, Change at Day 14 or 15 of Cycle 1
-171764.67 picograms/milliliter (pg/mL)
Standard Deviation 296343.195
98483.55 picograms/milliliter (pg/mL)
Standard Deviation 154432.714
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
IL-8, Change at Day 14 or 15 of Cycle 2
-71206.95 picograms/milliliter (pg/mL)
Standard Deviation 289379.557
-4087.25 picograms/milliliter (pg/mL)
Standard Deviation 127038.632
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
IL-8, Change at Overall Day 56
-121626.94 picograms/milliliter (pg/mL)
Standard Deviation 263731.747
52880.35 picograms/milliliter (pg/mL)
Standard Deviation 176223.116
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TGF-b1, Baseline
80.84 picograms/milliliter (pg/mL)
Standard Deviation 280.044
322.56 picograms/milliliter (pg/mL)
Standard Deviation 612.153
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TGF-b1, Change at Day 14 or 15 of Cycle 1
0 picograms/milliliter (pg/mL)
Standard Deviation 0
-322.56 picograms/milliliter (pg/mL)
Standard Deviation 612.15
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TGF-b1, Change at Day 14 or 15 of Cycle 2
-97.01 picograms/milliliter (pg/mL)
Standard Deviation 306.773
-168.91 picograms/milliliter (pg/mL)
Standard Deviation 774.276
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TGF-b1, Change at Overall Day 56
-61.32 picograms/milliliter (pg/mL)
Standard Deviation 367.788
-392.21 picograms/milliliter (pg/mL)
Standard Deviation 771.006
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TNF-alpha, Baseline
203.15 picograms/milliliter (pg/mL)
Standard Deviation 185.530
95.69 picograms/milliliter (pg/mL)
Standard Deviation 139.550
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TNF-alpha, Change at Day 14 or 15 of Cycle 1
-58.94 picograms/milliliter (pg/mL)
Standard Deviation 183.812
46.38 picograms/milliliter (pg/mL)
Standard Deviation 67.679
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TNF-alpha, Change at Day 14 or 15 of Cycle 2
-85.28 picograms/milliliter (pg/mL)
Standard Deviation 123.341
-58.45 picograms/milliliter (pg/mL)
Standard Deviation 144.728
Change From Baseline in Sputum Markers of Inflammation (Tumor Necrosis Factor-Alpha [TNF-α], Interleukin-8 [IL-8], Transforming Growth Factor Beta 1 [TGF-β1]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
TNF-alpha, Change at Overall Day 56
1.50 picograms/milliliter (pg/mL)
Standard Deviation 267.702
0.25 picograms/milliliter (pg/mL)
Standard Deviation 122.285

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable sputum markers of inflammation data.

The inflammatory marker UTP was measured in induced sputum from each participant. Hypertonic saline (3%) inhalation was used to induce the sputum (with efforts made to avoid oropharyngeal contamination). The sputum sample was divided into 4 aliquots (1 aliquot each for determination of cell count, IL-8 level, and elastase activity and 1 aliquot for potential future viscosity measurements). Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Sputum Markers of Inflammation (Uridine-5'-Triphosphate [UTP]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
UTP, Baseline
800.27 milligrams/deciliter (mg/dL)
Standard Deviation 509.794
483.31 milligrams/deciliter (mg/dL)
Standard Deviation 222.102
Change From Baseline in Sputum Markers of Inflammation (Uridine-5'-Triphosphate [UTP]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
UTP, Change at Day 14 or 15 of Cycle 1
-202.85 milligrams/deciliter (mg/dL)
Standard Deviation 427.324
411.50 milligrams/deciliter (mg/dL)
Standard Deviation 359.669
Change From Baseline in Sputum Markers of Inflammation (Uridine-5'-Triphosphate [UTP]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
UTP, Change at Day 14 or 15 of Cycle 2
-200.94 milligrams/deciliter (mg/dL)
Standard Deviation 549.730
198.03 milligrams/deciliter (mg/dL)
Standard Deviation 436.888
Change From Baseline in Sputum Markers of Inflammation (Uridine-5'-Triphosphate [UTP]) at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
UTP, Change at Overall Day 56
-220.16 milligrams/deciliter (mg/dL)
Standard Deviation 414.258
-15.86 milligrams/deciliter (mg/dL)
Standard Deviation 242.686

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable data of neutrophil levels in blood.

To assess inflammatory markers in the blood, neutrophil levels in the blood were measured. Higher levels of neutrophils are indicative of more inflammation. Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Clinically Significant Neutrophil Levels in Blood at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Neutrophils - Absolute, Baseline
3.555 10^9/liters
Standard Deviation 1.2328
4.709 10^9/liters
Standard Deviation 3.0884
Change From Baseline in Clinically Significant Neutrophil Levels in Blood at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Neutrophils - Absolute, Day 14 or 15 of Cycle 1
-0.332 10^9/liters
Standard Deviation 1.3416
-0.330 10^9/liters
Standard Deviation 2.7710
Change From Baseline in Clinically Significant Neutrophil Levels in Blood at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Neutrophils - Absolute, Day 14 or 15 of Cycle 2
-0.290 10^9/liters
Standard Deviation 1.4881
-0.748 10^9/liters
Standard Deviation 2.2473
Change From Baseline in Clinically Significant Neutrophil Levels in Blood at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Neutrophils - Absolute, Overall Day 56
-0.114 10^9/liters
Standard Deviation 1.4724
-0.931 10^9/liters
Standard Deviation 2.7452

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 or 15 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable serum levels of C-reactive data.

To assess inflammatory markers in the blood, serum levels of C-reactive protein were measured. Higher levels of C-reactive protein are indicative of more inflammation. Change from overall Baseline data at Day 14 or 15 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Clinically Significant Serum Levels of C-Reactive Protein at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
C-Reactive Protein, Baseline
6.432 milligrams/liter (mg/L)
Standard Deviation 4.9133
8.273 milligrams/liter (mg/L)
Standard Deviation 7.8838
Change From Baseline in Clinically Significant Serum Levels of C-Reactive Protein at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
C-Reactive Protein, Day 14 or 15 of Cycle 1
-0.150 milligrams/liter (mg/L)
Standard Deviation 1.6337
7.059 milligrams/liter (mg/L)
Standard Deviation 16.9563
Change From Baseline in Clinically Significant Serum Levels of C-Reactive Protein at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
C-Reactive Protein, Day 14 or 15 of Cycle 2
-0.233 milligrams/liter (mg/L)
Standard Deviation 0.7761
2.933 milligrams/liter (mg/L)
Standard Deviation 12.0167
Change From Baseline in Clinically Significant Serum Levels of C-Reactive Protein at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
C-Reactive Protein, Overall Day 56
2.361 milligrams/liter (mg/L)
Standard Deviation 7.4765
1.240 milligrams/liter (mg/L)
Standard Deviation 7.7170

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable body weight data.

Body weight were measured for each participant in kilograms (kg). Overall Baseline data for the study and change from overall Baseline data at Day 14 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in Body Weight at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Overall Baseline
40.35 kg
Standard Deviation 12.239
41.72 kg
Standard Deviation 11.435
Change From Baseline in Body Weight at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Change at Day 14 of Cycle 1
0.12 kg
Standard Deviation 1.064
-0.01 kg
Standard Deviation 1.031
Change From Baseline in Body Weight at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Change at Day 14 of Cycle 2
0.37 kg
Standard Deviation 1.293
0.03 kg
Standard Deviation 0.980
Change From Baseline in Body Weight at Day 14 or 15 of Cycles 1 and 2 and Overall Day 56
Change at Overall Day 56
0.43 kg
Standard Deviation 1.278
0.23 kg
Standard Deviation 1.528

SECONDARY outcome

Timeframe: Overall Baseline, Day 14 of Cycle 1 and Cycle 2 (1 cycle=28 days), and Overall Day 56

Population: All randomized participants who received at least 1 dose of study drug and had evaluable CF-related symptom scores.

The CF symptom questionnaire includes questions related to daytime cough, nighttime cough, sputum volume, sputum clearance, physical fatigue, and shortness of breath. The participants (or their guardians) completed the CF symptom questionnaire, under the Investigator's supervision, before the TEPD, nasal mucosal curettage, pulmonary function tests, or sputum induction procedures were performed. For each symptom, the participants were asked to choose the response that best matched their experience during the 3 days before the questionnaire was completed. The scale of the 4 possible responses for each question was 0 (best response) to 4 (worse response). The sum of the scores for all of the questions was calculated. The scale for the sum of the scores was 0 (best response) to 24 (worse response). Overall Baseline data for the study and change from overall Baseline data at Day 14 of Cycles 1 and 2 and at overall Day 56 are presented.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=15 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Change From Baseline in the CF-Related Symptom Scores, as Assessed Using a Participant-Reported Questionnaire at Day 14 of Cycles 1 and 2 and Overall Day 56
Overall Baseline
14.0 scores on a scale
Interval 7.0 to 19.0
11.0 scores on a scale
Interval 7.0 to 17.0
Change From Baseline in the CF-Related Symptom Scores, as Assessed Using a Participant-Reported Questionnaire at Day 14 of Cycles 1 and 2 and Overall Day 56
Change at Day 14 of Cycle 1
-0.5 scores on a scale
Interval -7.0 to 6.0
0 scores on a scale
Interval -5.0 to 4.0
Change From Baseline in the CF-Related Symptom Scores, as Assessed Using a Participant-Reported Questionnaire at Day 14 of Cycles 1 and 2 and Overall Day 56
Change at Day 14 of Cycle 2
-1.0 scores on a scale
Interval -5.0 to 7.0
1.0 scores on a scale
Interval -5.0 to 8.0
Change From Baseline in the CF-Related Symptom Scores, as Assessed Using a Participant-Reported Questionnaire at Day 14 of Cycles 1 and 2 and Overall Day 56
Change at Overall Day 56
-1.0 scores on a scale
Interval -7.0 to 9.0
0 scores on a scale
Interval -6.0 to 8.0

SECONDARY outcome

Timeframe: 0 (predose), 2 and 3 hours postdose of the morning dose; 0 (predose), 2 and 3 hours postdose of the midday dose; and 0 hours (predose), 2, 3, and 12 hours postdose of the evening dose on Day 14 of Cycle 1 and Cycle 2

Population: All randomized participants who received at least 1 dose of study drug and had evaluable AUC0-24 data. The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.

All PK parameters were calculated using the actual postdose blood sampling times in relationship to the time of the first dose (morning dose) on Day 14 of each treatment cycle. AUC0-24 values were calculated by WinNonlin by extrapolation to 24 hours if the last sampling timepoint was before 24 hours and by interpolation if the last sampling timepoint was after 24 hours. Extrapolation of AUC to 24 hours was performed only if the last sampling timepoint did not deviate from the nominal collection time by more than approximately 10%.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=30 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=30 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
PK: Area Under the Concentration Time Curve From Time 0 (Dosing) to 24 Hours (AUC0-24) of Ataluren
121.52 microgram*hours/milliliter (μg*h/mL)
Standard Error 9.79
348.75 microgram*hours/milliliter (μg*h/mL)
Standard Error 21.46

SECONDARY outcome

Timeframe: Baseline up to Day 14 in Cycle 1 and Cycle 2

Population: All randomized participants who received at least 1 dose of study drug and had evaluable compliance data. The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.

For each participant, compliance was described in terms of the percentage of drug actually taken relative to the amount that was prescribed (taking into account physician-prescribed reductions and interruptions). The number of doses described as "taken less than planned" includes cases in which the participants took less than the prescribed dose and/or cases in which the Investigator reduced the dose.

Outcome measures

Outcome measures
Measure
Ataluren 4, 4, and 8 mg/kg, Then Ataluren 10, 10, and 20 mg/kg
n=30 Participants
During Cycle 1, participants received ataluren at 4 mg/kg in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 10, 10, and 20 mg/kg) for Cycle 2.
Ataluren 10, 10, and 20 mg/kg, Then Ataluren 4, 4, and 8 mg/kg
n=30 Participants
During Cycle 1, participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment. Then, the participants crossed over to the other ataluren dose regimen (ataluren 4, 4, and 8 mg/kg) for Cycle 2.
Compliance With Study Treatment
Percentage of doses taken as planned
97.50 percentage of doses
Interval 81.8 to 100.0
100.0 percentage of doses
Interval 65.1 to 100.0
Compliance With Study Treatment
Percentage of doses missed
2.40 percentage of doses
Interval 0.0 to 15.8
0 percentage of doses
Interval 0.0 to 16.2
Compliance With Study Treatment
Percentage of doses taken less than planned
0 percentage of doses
Interval 0.0 to 10.5
0 percentage of doses
Interval 0.0 to 30.2
Compliance With Study Treatment
Percentage of doses taken greater than planned
0 percentage of doses
Interval 0.0 to 0.0
0 percentage of doses
Interval 0.0 to 0.0

Adverse Events

Ataluren 4, 4, and 8 mg/kg

Serious events: 1 serious events
Other events: 19 other events
Deaths: 0 deaths

Ataluren 10, 10, and 20 mg/kg

Serious events: 1 serious events
Other events: 24 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Ataluren 4, 4, and 8 mg/kg
n=30 participants at risk
Participants received ataluren at 4 milligrams in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment.
Ataluren 10, 10, and 20 mg/kg
n=30 participants at risk
Participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment.
Respiratory, thoracic and mediastinal disorders
Cystic fibrosis pulmonary exacerbation
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Haematemesis
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.

Other adverse events

Other adverse events
Measure
Ataluren 4, 4, and 8 mg/kg
n=30 participants at risk
Participants received ataluren at 4 milligrams in the morning, 4 mg/kg at midday, and 8 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment.
Ataluren 10, 10, and 20 mg/kg
n=30 participants at risk
Participants received ataluren at 10 mg/kg in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening for 14 days, followed by a 14-day follow-up period without treatment.
Gastrointestinal disorders
Abdominal pain
20.0%
6/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
26.7%
8/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Diarrhoea
10.0%
3/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Nausea
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Vomiting
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
General disorders
Chest pain
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
General disorders
Pyrexia
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Infections and infestations
Nasopharyngitis
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Infections and infestations
Rhinitis
23.3%
7/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
23.3%
7/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Infections and infestations
Stenotrophomonas infection
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Musculoskeletal and connective tissue disorders
Arthralgia
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Respiratory, thoracic and mediastinal disorders
Cough
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
10.0%
3/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Respiratory, thoracic and mediastinal disorders
Cystic fibrosis pulmonary exacerbation
13.3%
4/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
20.0%
6/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Respiratory, thoracic and mediastinal disorders
Haemoptysis
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Respiratory, thoracic and mediastinal disorders
Nasal congestion
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Respiratory, thoracic and mediastinal disorders
Productive cough
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
10.0%
3/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Skin and subcutaneous tissue disorders
Rash pruritic
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Ascites
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Constipation
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Diarrhoea haemorrhagic
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Gastrointestinal disorders
Dysphagia
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
General disorders
Asthenia
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
General disorders
Fatigue
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
General disorders
Thirst
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Infections and infestations
Laryngitis
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Investigations
Blood creatinine increased
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Investigations
Gamma-glutamyltransferase increased
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Musculoskeletal and connective tissue disorders
Tendonitis
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Nervous system disorders
Headache
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
6.7%
2/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
Skin and subcutaneous tissue disorders
Pruritus
0.00%
0/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.
3.3%
1/30 • Overall Baseline up to Overall Day 56
The data for each dose level represents pooled data for participants in the low-to-high dose sequence and the high-to-low dose sequence.

Additional Information

Patient Advocacy

PTC Therapeutics, Inc.

Phone: 1-866-562-4620

Results disclosure agreements

  • Principal investigator is a sponsor employee The only disclosure restriction on the Principal Investigator is that the Sponsor can review results communications prior to public release and can embargo communications regarding trial results for a period that is up to 180 days from the time submitted to the sponsor for review. The sponsor may consult with the PI to require changes to the communication embargo.
  • Publication restrictions are in place

Restriction type: OTHER