Trial Outcomes & Findings for Study of Dexpramipexole Chronic Sinusitis With Nasal Polyps and Eosinophilia (NCT NCT02217332)

NCT ID: NCT02217332

Last Updated: 2021-05-18

Results Overview

Change in peripheral blood eosinophil (measured in cells/μL) from baseline to month 6 is presented as ratio to baseline.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

20 participants

Primary outcome timeframe

Baseline and Month 6

Results posted on

2021-05-18

Participant Flow

During a screening period of between 14 and 21 days, subjects were monitored symptoms of sinusitis and asthma. Subject who failed to meet the eligibility criteria during the screening period were disqualified.

Participant milestones

Participant milestones
Measure
Dexpramipexole
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Overall Study
STARTED
20
Overall Study
COMPLETED
13
Overall Study
NOT COMPLETED
7

Reasons for withdrawal

Reasons for withdrawal
Measure
Dexpramipexole
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Overall Study
Adverse Event
3
Overall Study
Dose interruption >1 month
1
Overall Study
Protocol Violation (eligibility)
1
Overall Study
Withdrawal by Subject
1
Overall Study
Lost to Follow-up
1

Baseline Characteristics

Study of Dexpramipexole Chronic Sinusitis With Nasal Polyps and Eosinophilia

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Dexpramipexole
n=20 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Age, Continuous
46.1 years
STANDARD_DEVIATION 9.78 • n=5 Participants
Age, Customized
< 50 years
14 Participants
n=5 Participants
Age, Customized
50 to 65 years
5 Participants
n=5 Participants
Age, Customized
> 65 years
1 Participants
n=5 Participants
Sex: Female, Male
Female
8 Participants
n=5 Participants
Sex: Female, Male
Male
12 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
19 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
3 Participants
n=5 Participants
Race (NIH/OMB)
White
17 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
Region of Enrollment
United States
20 participants
n=5 Participants
CSNP-E Symptoms
Anterior and/or posterior mucopurulent drainage
20 Participants
n=5 Participants
CSNP-E Symptoms
Sinonasal obstruction/congestion
20 Participants
n=5 Participants
CSNP-E Symptoms
Decreased sense of smell (anosmia)
20 Participants
n=5 Participants
Duration of Symptoms (months)
112.4 months
STANDARD_DEVIATION 138.13 • n=5 Participants
Duration of symptoms
≤ 1 year
3 Participants
n=5 Participants
Duration of symptoms
> 1 year to ≤ 5 years
6 Participants
n=5 Participants
Duration of symptoms
> 5 years to ≤ 10 years
6 Participants
n=5 Participants
Duration of symptoms
> 10 years
5 Participants
n=5 Participants

PRIMARY outcome

Timeframe: Baseline and Month 6

Population: All subjects who had a Month 3 evaluation (on study drug Day 77 or later) for TPS and peripheral blood eosinophil count. Last observation carried forward (LOCF) was used to replace missing data due to drop out. Only Month 3 data or later (assessment date Day 77 or later and within 7 days of last dose) were used.

Change in peripheral blood eosinophil (measured in cells/μL) from baseline to month 6 is presented as ratio to baseline.

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=16 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Ratio to Baseline in Peripheral Blood Eosinophil Counts After 6 Months of Treatment
0.06 ratio to baseline
Interval 0.023 to 0.154

PRIMARY outcome

Timeframe: Baseline and Month 6

Population: All subjects who had a Month 3 evaluation (on study drug Day 77 or later) for TPS and peripheral blood eosinophil count. Last observation carried forward (LOCF) was used to replace missing data due to drop out. Only Month 3 data or later (assessment date Day 77 or later and within 7 days of last dose) were used.

The change in Nasal Polyp Score (NPS) score after 6 months of treatment is presented. A blinded Central Endoscopy Rater determined the NPS for each nare on a scale of 0 to 4, and the bilateral NPS scores were added to generate the Total Polyp Score (TPS) on a scale of 0 to 8. A lower TPS corresponds to a lower polyp burden.

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=15 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Change From Baseline in Total Polyp Score (TPS) After 6 Months of Treatment
0.07 units on a scale
Standard Deviation 1.751

SECONDARY outcome

Timeframe: 6 months

Population: The safety population included all subjects who received at least 1 dose of study treatment.

Summary of subjects from the safety population who experienced potentially clinically significant values in hand serum chemistry results

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=20 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Albumin <= 25 g/L
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Alanine aminotransferase (ALT) >= 1.5 x ULN
1 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Aspartate aminotransferase (AST) >= 1.5 x ULN
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Total bilirubin >= 1.5 x ULN
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Glucose>= 9.7 mmol/L
1 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Glucose <= 2.2 mmol/L
1 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Eosinophils > 1.6 x 10(9)/L
1 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Hematocrit - Females >=54%
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Hematocrit - Females <= 32%
2 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Hemoglobin - Females >=175g/L
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Hemoglobin - Females <= 95g/L
2 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
HIGH: Lymphocytes > 12 x 10(9)/L
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Lymphocytes < 0.8 x 10(9)/L
2 Participants
Number of Subjects With Potentially Clinically Significant Values in Clinical Laboratory Evaluations
LOW: Neutrophils < 1.5 x 10(9)/L
0 Participants

SECONDARY outcome

Timeframe: 6 months

Population: The safety population included all subjects who received at least 1 dose of study treatment.

Summary of subjects from the safety population who experienced potentially clinically significant values or changes in vital signs or weight

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=20 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Systolic Blood Pressure: >180 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Systolic Blood Pressure: increase from pre-dosing of more than 40 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Systolic Blood Pressure: <90 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Systolic Blood Pressure: decrease from pre-dosing of more than 30 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Diastolic Blood Pressure: >105 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Diastolic Blood Pressure: increase from pre-dosing of more than 30 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Diastolic Blood Pressure: <50 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Diastolic Blood Pressure: decrease from pre-dosing of more than 20 mmHg
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Heart Rate: >120 beats per minute
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Heart Rate: increase from pre-dosing of more than 20 beats per minute
1 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Heart Rate: <50 beats per minute
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Heart Rate: decrease from pre-dosing of more than 20 beats per minute
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Temperature: >38ºC and an increase from pre-dosing of at least 1ºC
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Body Weight: >7% increase from baseline value
0 Participants
Number of Subjects With Potentially Clinically Significant Values in Vital Signs and Weight
Body Weight: <=7% decrease from baseline value
0 Participants

SECONDARY outcome

Timeframe: 6 months

Population: The safety population included all subjects who received at least 1 dose of study treatment.

Summary of subjects from the safety population who experienced potentially significant values in electrocardiogram parameters

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=20 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: >450 msec
2 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: >480 msec
0 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: > 450 msec and ≤ 450 msec at baseline
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: > 480 msec and ≤ 480 msec at baseline
0 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: > 450 msec and change from baseline > 30 msec
0 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF: > 480 msec and change from baseline > 30 msec
0 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF change from baseline: >30 msec
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
QTcF change from baseline: >60 msec
0 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Rhythm abnormalities: Sinus rhythm
17 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Rhythm abnormalities: Sinus bradycardia
3 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Rhythm abnormalities: Premature atrial complexes, conducted or non-conducted sinus rhythm
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Nonspecific T wave abnormality
3 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Early repolarization
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Early repolarization, considered normal variant
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Nonspecific ST deviation
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Nonspecific ST deviation, prolonged QTcF interval
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Nonspecific T wave abnormality, prolonged QTcF interval
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
ST-T abnormalities: Prolonged QTcF interval
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Conduction abnormality: First degree AV block
2 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Conduction abnormality: Complete right bundle branch block
1 Participants
Number of Subjects With Potentially Significant Values in Electrocardiogram Parameters
Conduction abnormality: Complete right bundle branch block first degree AV block
1 Participants

SECONDARY outcome

Timeframe: Baseline and Month 3

Population: All subjects who had a Month 3 evaluation (on study drug Day 77 or later) for total eosinophil count

Change in peripheral blood eosinophil (measured in cells/μL) from baseline to month 3 is presented as ratio to baseline.

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=16 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Ratio to Baseline in Peripheral Blood Eosinophil Counts After 3 Months of Treatment
0.05 ratio
Interval 0.019 to 0.142

SECONDARY outcome

Timeframe: Baseline and Month 3

Population: All subjects who had a Month 3 evaluation (on study drug Day 77 or later) for total eosinophil count and total polyp score

The change in Nasal Polyp Score (NPS) score after 3 months of treatment is presented. A blinded Central Endoscopy Rater determined the NPS for each nare on a scale of 0 to 4, and the bilateral NPS scores were added to generate the Total Polyp Score (TPS) on a scale of 0 to 8. A lower TPS corresponds to a lower polyp burden.

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=16 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Change From Baseline in TPS After 3 Months of Treatment
0.0 units on a scale
Standard Deviation 1.414

OTHER_PRE_SPECIFIED outcome

Timeframe: Baseline and Month 6

Population: All subjects who had a Month 3 evaluation (on study drug Day 77 or later) for TPS and peripheral blood eosinophil count (Efficacy Population). Additionally, subjects with \<5 eos/hpf at screening or baseline visit are not included in this analysis.

Change in polyp tissue eosinophil count measured as eosinophils/hpf (high powered field) from baseline to month 6 is presented as ratio to baseline.

Outcome measures

Outcome measures
Measure
Dexpramipexole
n=12 Participants
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Ratio to Baseline in Polyp Tissue Eosinophil Count After 6 Months of Treatment
0.03 ratio to baseline
Interval 0.02 to 0.06

Adverse Events

Dexpramipexole

Serious events: 1 serious events
Other events: 18 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Dexpramipexole
n=20 participants at risk
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Metabolism and nutrition disorders
biliary dyskinesia
5.0%
1/20 • Number of events 1 • 6 months on treatment

Other adverse events

Other adverse events
Measure
Dexpramipexole
n=20 participants at risk
dexpramipexole 150 mg BID dexpramipexole: Dexpramipexole capsule-shaped film-coated tablets at the dose strength of 150 mg administered orally as 1 tablet twice daily (300 mg/day)
Ear and labyrinth disorders
Ear pain
5.0%
1/20 • Number of events 1 • 6 months on treatment
Ear and labyrinth disorders
Vertigo
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Abdominal distension
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Abdominal pain
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Constipation
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Diarrhoea
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Dyspepsia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Eosinophilic oesophagitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Flatulence
5.0%
1/20 • Number of events 1 • 6 months on treatment
Gastrointestinal disorders
Gastrooesophageal reflux disease
10.0%
2/20 • Number of events 2 • 6 months on treatment
General disorders
Fatigue
5.0%
1/20 • Number of events 1 • 6 months on treatment
General disorders
Oedema
5.0%
1/20 • Number of events 1 • 6 months on treatment
General disorders
Xerosis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Hepatobiliary disorders
Biliary dyskinesia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Ear infection
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Folliculitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Nasopharyngitis
15.0%
3/20 • Number of events 4 • 6 months on treatment
Infections and infestations
Onychomycosis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Oral candidiasis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Otitis media
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Rhinitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Sinusitis
40.0%
8/20 • Number of events 12 • 6 months on treatment
Infections and infestations
Subcutaneous abscess
5.0%
1/20 • Number of events 1 • 6 months on treatment
Infections and infestations
Upper respiratory tract infection
5.0%
1/20 • Number of events 1 • 6 months on treatment
Metabolism and nutrition disorders
Decreased appetite
10.0%
2/20 • Number of events 2 • 6 months on treatment
Metabolism and nutrition disorders
Hyperglycemia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Metabolism and nutrition disorders
Hypoglycemia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Metabolism and nutrition disorders
Polydipsia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Musculoskeletal and connective tissue disorders
Arthralgia
10.0%
2/20 • Number of events 2 • 6 months on treatment
Musculoskeletal and connective tissue disorders
Pain in extremity
5.0%
1/20 • Number of events 1 • 6 months on treatment
Musculoskeletal and connective tissue disorders
Tendonitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Nervous system disorders
Headache
5.0%
1/20 • Number of events 1 • 6 months on treatment
Nervous system disorders
Sinus headache
5.0%
1/20 • Number of events 1 • 6 months on treatment
Psychiatric disorders
Anxiety
5.0%
1/20 • Number of events 1 • 6 months on treatment
Psychiatric disorders
Middle insomnia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Psychiatric disorders
Sleep disorder
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Cough
10.0%
2/20 • Number of events 2 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Dyspnoea
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Epistaxis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Intranasal paraesthesia
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Nasal congestion
15.0%
3/20 • Number of events 4 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Nasal septum ulceration
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Rales
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Rhinitis allergic
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Upper-airway cough syndrome
5.0%
1/20 • Number of events 1 • 6 months on treatment
Respiratory, thoracic and mediastinal disorders
Wheezing
5.0%
1/20 • Number of events 1 • 6 months on treatment
Skin and subcutaneous tissue disorders
Dermatitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Skin and subcutaneous tissue disorders
Skin hyperpigmentation
5.0%
1/20 • Number of events 1 • 6 months on treatment
Skin and subcutaneous tissue disorders
Stasis dermatitis
5.0%
1/20 • Number of events 1 • 6 months on treatment
Skin and subcutaneous tissue disorders
Urticaria
5.0%
1/20 • Number of events 1 • 6 months on treatment

Additional Information

Head of Regulatory

Knopp Biosciences

Phone: 4124881776

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place

Restriction type: OTHER