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Monitoring Response to Orkambi in Cystic Fibrosis Lung Disease by Inhaled Xenon MRI

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ClinicalTrials.gov Identifier: NCT02848560
Recruitment Status : Active, not recruiting
First Posted : July 28, 2016
Last Update Posted : August 30, 2022
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by (Responsible Party):
Jason Woods, Children's Hospital Medical Center, Cincinnati

Brief Summary:

This is an observational study for children with Cystic Fibrosis (CF) who are eligible based on their CF gene type. One group will be called the treatment group because they have the gene type (homozygous F508del) that makes them clinically eligible through their CF care provider to begin treatment with the new FDA approved CF drug called orkambi. For the control group, children will be enrolled who have a similar CF gene type (heterozygous F508del) but are not eligible to be prescribed orkambi.

The two groups will be followed for four visits over about 3 to 4 years to observe changes in the lungs. Methods to measure the changes in lung disease will include:

MRI with non-FDA approved inhaled xenon gas to take detailed images of the lungs, Pulmonary Function Tests (PFT), Lung Clearance Index (LCI), Baseline CT image of the lungs if not ordered as part of usual clinical care.

The first two visits will be done before starting clinical treatment with orkambi and will be a minimum of 28 days apart and up to 18 months. The third visit will be scheduled about 3 months after starting orkambi and the fourth visit about 18 months later. For the control group, the timing of visits will be similar to treatment group and visits may be scheduled around annual CF care visits.

Condition or disease Intervention/treatment
Cystic Fibrosis Drug: Hyperpolarized Xenon

Detailed Description:

This is a controlled observational longitudinal study designed to capture Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) modulator therapy naive Cystic Fibrosis (CF) subjects with F508del(+/+) mutations before they age into the FDA approved treatment window for the CFTR modulator orkambi (ivacaftor/lumacaftor). These subjects will be compared to disease controls. The treatment group will be observed twice (at least 28 days apart and up to 18 months) before clinically starting orkambi and observed twice (at about 3 months and about 18 months) after clinically starting orkambi .

This study takes advantage of the timely development of Ultrashort Echo Time Magnetic Resonance Imaging (UTE MRI), Hyperpolarized Xenon (129Xe) MRI, Lung Clearance Index (LCI), and the approval of F508del CFTR-directed CF therapy in children. The proposal will:

i) validate the emerging biomarker (UTE MRI) within CF children independent of genotype, ii) define the trajectory of UTE MRI and forced expiratory volume in 1 second (FEV1) changes before and after initiating orkambi therapy compared with age-matched CF controls, and iii) determine the relationships between regional structural abnormalities (UTE MRI) and regional (129Xe MRI) and global (LCI) functional measures of ventilation. Results will establish MRI as a sensitive lung imaging tool that is translatable to all CF centers and can be applied throughout the lifespan of CF patients.

CF patients with one or two copies of the F508del CFTR mutation who are 6-12 years old will undergo UTE MRI soon after a clinical computerized tomography (CT) scan, with disease quantification using an established scoring system for both modalities. Quantitative imaging data and LCI will be compared with spirometry (gold standard for CF lung disease) and clinical predictors of disease progression.

The F508del(+/+) patient cohort will differ genotypically from the control cohort (F508del[+/-]). All patients in the F508del(+/-) cohort will be pancreatic insufficient and also have a nonfunctional second allele (Class I or II mutation, not candidates for modulator therapy). These two cohorts are phenotypically indistinguishable without modulator treatment, and therefore the untreated cohort will serve as an ideal age and time-matched control group for the F508del(+/+) subjects who clinically initiate orkambi.

Disease trajectories in the two groups, as quantified by changes in pulmonary UTE MRI, will be compared with FEV1. MRI analysis will include quantitative and reader-based "Brody" scoring for the whole lung, lung lobes, and for subcategories of the Brody scoring system (in particular bronchiectasis, bronchial wall thickening, and mucus plugging).

The longitudinal study will capture both cohorts at their scheduled annual CF visits when possible over about 4 years with modifications to the timeline for the treatment group based on when they are clinically scheduled to begin orkambi treatment.

As FDA approved indications for orkambi change, subjects in the F508del(+/+) cohort will become candidates for modulators prior to their 12th birthday. The FDA is currently reviewing for approval in Fall 2016 to lower the prescribing age to 6 years and the investigators will be enrolling to meet the changes at that time.

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Study Type : Observational
Estimated Enrollment : 38 participants
Observational Model: Case-Control
Time Perspective: Prospective
Official Title: Validation of MRI as a Sensitive Tool to Longitudinally Monitor CF Lung Disease Progression and Response to CFTR Modulator Therapy in Young Children With CF
Actual Study Start Date : March 2016
Estimated Primary Completion Date : October 31, 2023
Estimated Study Completion Date : December 31, 2023

Resource links provided by the National Library of Medicine

Drug Information available for: Xenon

Group/Cohort Intervention/treatment
Observation of lung changes over time by hyperpolarized xenon MRI on CF patients homozygous for F508del CFTR mutation as they age into the FDA approved treatment window for the CFTR modulator orkambi. Subjects will be observed at 2 time points before starting clinically prescribed treatment (orkambi) and 2 time points while on orkambi.
Drug: Hyperpolarized Xenon
Inhaled contrast for MRI occurring at each of 4 visits.
Other Name: 129Xe

Observation of lung changes over time by hyperpolarized xenon MRI on CF patients heterozygous for F508del CFTR mutation at similar timepoints to treatment group. Control subjects are not be eligible to be clinically prescribed orkambi based on FDA approval.
Drug: Hyperpolarized Xenon
Inhaled contrast for MRI occurring at each of 4 visits.
Other Name: 129Xe

Primary Outcome Measures :
  1. Hyperpolarized 129Xe MRI Image Analysis [ Time Frame: Visit 4 (year 3) ]
    Lung defect calculations (total and lobar defect percentages) will be performed by evaluating the percentage of voxels with signals below a threshold value of 60% of the total lung mean signal.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   6 Years to 12 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Cystic Fibrosis patients naïve to orkambi and with either homozygous F508del CFTR mutation or heterozygous F508del CFTR mutation and pancreatic insufficient.

Inclusion Criteria:

Treatment group:

  • male or female between the ages of 6 through 12 years at enrollment
  • two copies of the F508del CFTR mutation
  • anticipated to be a candidate for treatment with orkambi

Control group:

  • male or female between the ages of 6 through 12 years at enrollment
  • two non-functional CFTR mutations with one of them being F508del CFTR mutation
  • not eligible for CFTR modulation therapy

Exclusion Criteria:

  • FEV1 percent predicted of <60%
  • standard MRI exclusions (metal implants, claustrophobia)
  • pregnancy

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02848560

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United States, Ohio
Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, United States, 45229
Sponsors and Collaborators
Children's Hospital Medical Center, Cincinnati
National Heart, Lung, and Blood Institute (NHLBI)
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Principal Investigator: Jason Woods, PhD Children's Hospital Medical Center, Cincinnati
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Responsible Party: Jason Woods, PhD, Children's Hospital Medical Center, Cincinnati
ClinicalTrials.gov Identifier: NCT02848560    
Other Study ID Numbers: CINOO1-CF Orkambi and Xe MRI
1R01HL131012-01A1 ( U.S. NIH Grant/Contract )
First Posted: July 28, 2016    Key Record Dates
Last Update Posted: August 30, 2022
Last Verified: August 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: MRI results will be shared with treating CF physicians to support clinical decisions.
Keywords provided by Jason Woods, Children's Hospital Medical Center, Cincinnati:
Cystic Fibrosis
129Xe MRI
hyperpolarized xenon
CFTR modulator therapy
Additional relevant MeSH terms:
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Cystic Fibrosis
Lung Diseases
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Anesthetics, Inhalation
Anesthetics, General
Central Nervous System Depressants
Physiological Effects of Drugs