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CompletedNCT02934698Updated Aug 6, 2018Results posted

An Efficacy and Safety Study of Ivacaftor in Patients With Cystic Fibrosis and Two Splicing Mutations

A Phase 3 interventional study of Ivacaftor in Cystic Fibrosis, sponsored by Medical University of South Carolina. Completed. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2018-08-06.

Sponsored by Medical University of South Carolina · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
2
Allocation
Not applicable
Ages
18 Years and older
Sex
Female
01

Study summary

This postmarketing N of 2 study is designed to evaluate the efficacy and safety of open-label ivacaftor treatment in two sisters with cystic fibrosis and pancreatic sufficiency.

Read the detailed description

The two sisters have a splicing mutation that is predicted to respond favorably to ivacaftor therapy. In addition to measurement of usual clinical outcomes (i.e. lung function, nutritional status), there is great interest on the impact on nontuberculous mycobacteria (NTM) airways infection.

Subjects will undergo sputum cultures at baseline and monthly during treatment, initially in the absence of anti-NTM therapy but with the intent to treat with antibiotics if there is persistence of the infection in cultures. Other clinical outcomes will include changes in sweat chloride, lung function and weight. Safety measures will include periodic assessment of liver enzymes. All serious and non-serious adverse events will be collected

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Conditions studied

  • Cystic Fibrosis
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In context

Cystic Fibrosis

1,581 studies on the registry are indexed under Cystic Fibrosis; 190 are open to participants now.

This study's enrollment of 2 is below the median of 36 across 1,034 interventional studies indexed under Cystic Fibrosis.

Browse Cystic Fibrosis studies →

Lead sponsor

Medical University of South Carolina is the lead sponsor of 852 studies on the registry; 165 are open to participants now.

Of its 128 completed or terminated interventional studies of FDA-regulated products, 101 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Subjects are >18 years of age and able to provide informed consent.
  • Subjects reside in the US and are willing to be treated with ivacaftor.
  • Subjects have the splicing mutation of interest.
  • Subjects are willing and able to perform requirements of the study.

Exclusion criteria

Exclusion Criteria:

  • There are no relevant exclusion criteria for this n-of-2 study.
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
2 participants (actual)

Study arms

  • Experimental
    Ivacaftor

    There is only one arm to this study. The two sisters with Cystic Fibrosis will both receive Ivacaftor for 6 months for their treatment.

    Drug: Ivacaftor

Interventions

  • DrugIvacaftor

    Subjects will be treated with ivacaftor for 6 months and followed for 7 months and will undergo assessments along the way to measure sweat chloride and sputum amounts.

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What researchers measure

Primary outcomes

  1. Forced Expiratory Volume

    Absolute change in percent predicted in 1 second FEV1 from baseline through week 24

    Time frame: 24 weeks

Secondary outcomes

  1. Sputum Results

    Achievement of mycobacterial culture conversion (negative culture)

    Time frame: 24 weeks

  2. Sweat Chloride

    Testing efficacy through gathering absolute change in sweat chloride from baseline through week 24

    Time frame: 24 Weeks

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Results

Posted Aug 6, 2018

Participant flow

Participant flow — Overall Study
MilestoneIvacaftor
Started2
Completed2
Not completed0

Outcome measures

PrimaryForced Expiratory Volume

Absolute change in percent predicted in 1 second FEV1 from baseline through week 24

Time frame:
24 weeks
Reported as:
Mean · percentage of predicted
Forced Expiratory Volume
percentage of predictedIvacaftor
Forced Expiratory Volume4 (3 to 5)
SecondarySputum Results

Achievement of mycobacterial culture conversion (negative culture)

Time frame:
24 weeks
Reported as:
Count of participants · Participants
Sputum Results
ParticipantsIvacaftor
Sputum Results2
SecondarySweat Chloride

Testing efficacy through gathering absolute change in sweat chloride from baseline through week 24

Time frame:
24 Weeks
Reported as:
Mean · mmol/L
Sweat Chloride
mmol/LIvacaftor
Sweat Chloride-5.7 (-8 to -3.5)

Adverse events

Collected over 24 weeks. Non-serious events are listed at a 1% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Ivacaftor0/2 (0%)0/2 (0%)2/2 (100%)
Most frequent other events
Most frequent other events
EventIvacaftor
Sinus congestionInfections and infestations2/2
FolliculitisSkin and subcutaneous tissue disorders1/2
palpitationsCardiac disorders1/2

Baseline characteristics

Age, Continuous
Age, Continuous(years)Ivacaftor
Mean37 (36 to 38)
Sex: Female, Male
Sex: Female, Male(Participants)Ivacaftor
Female2
Male0
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Ivacaftor
Hispanic or Latino0
Not Hispanic or Latino2
Unknown or Not Reported0
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Ivacaftor
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American0
White2
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(participants)Ivacaftor
United States2
08

Study locations

No study locations are listed for this record.

09

References and documents

Study documents

  • Protocol and statistical analysis plan · Jun 22, 2015

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 6, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02934698
Lead sponsor
Medical University of South Carolina
Collaborators
Vertex Pharmaceuticals Incorporated
Responsible party
Sponsor
First posted
Oct 17, 2016
Start date
Nov 1, 2016
Primary completion
May 2018
Completion
May 2018
Results posted
Aug 6, 2018
Last update
Aug 6, 2018

Study contacts

Patrick A Flume, MD
principal investigator · Medical University of South Carolina

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2018. You cannot join it, but the record below documents what was studied.

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