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A Study Evaluating Efficacy and Safety of Elexacaftor/Tezacaftor/Ivacaftor in Subjects 6 Through 11 Years of Age With Cystic Fibrosis and F/MF Genotypes

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04353817
Recruitment Status : Recruiting
First Posted : April 20, 2020
Last Update Posted : September 23, 2020
Information provided by (Responsible Party):
Vertex Pharmaceuticals Incorporated

Brief Summary:
This study will evaluate the efficacy and safety of elexacaftor (ELX) / tezacaftor (TEZ) / ivacaftor (IVA) triple combination (TC) in subjects 6 through 11 years of age with cystic fibrosis (CF) who are heterozygous for F508del and a minimal function (MF) mutation (F/MF genotypes).

Condition or disease Intervention/treatment Phase
Cystic Fibrosis Drug: ELX/TEZ/IVA Drug: IVA Other: Placebo Phase 3

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 108 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase 3b, Randomized, Placebo-controlled Study Evaluating the Efficacy and Safety of Elexacaftor/Tezacaftor/Ivacaftor in Cystic Fibrosis Subjects 6 Through 11 Years of Age Who Are Heterozygous for the F508del Mutation and a Minimal Function Mutation (F/MF)
Actual Study Start Date : June 19, 2020
Estimated Primary Completion Date : May 2021
Estimated Study Completion Date : May 2021

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Cystic Fibrosis
Drug Information available for: Ivacaftor

Arm Intervention/treatment
Experimental: ELX/TEZ/IVA
Subjects will receive ELX/TEZ/IVA in the morning and IVA in the evening.
Fixed-dose combination (FDC) tablet.
Other Names:
  • VX-445/VX-661/VX-770
  • elexacaftor/tezacaftor/ivacaftor

Drug: IVA
Mono tablet.
Other Names:
  • VX-770
  • ivacaftor

Placebo Comparator: Placebo
Subjects will receive placebo matched to ELX/TEZ/IVA in the morning and placebo matched to IVA in the evening.
Other: Placebo
Placebo matched to ELX/TEZ/IVA.

Other: Placebo
Placebo matched to IVA.

Primary Outcome Measures :
  1. Absolute change in lung clearance index 2.5 (LCI2.5) [ Time Frame: From baseline through Week 24 ]

Secondary Outcome Measures :
  1. Absolute change in sweat chloride (SwCl) [ Time Frame: From baseline through Week 24 ]
  2. Safety and tolerability as assessed by number of subjects with adverse events (AEs) and serious adverse events (SAEs) [ Time Frame: From Day 1 up to Week 28 ]

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 11 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Key Inclusion Criteria:

  • Heterozygous for the F508del mutation (F/MF)
  • Forced expiratory volume in 1 second (FEV1) value greater than equal to(≥) 70%

Key Exclusion Criteria:

  • Clinically significant cirrhosis with or without portal hypertension
  • Lung infection with organisms associated with a more rapid decline in pulmonary status
  • Solid organ or hematological transplantation

Other protocol defined Inclusion/Exclusion criteria may apply

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 identifier (NCT number): NCT04353817

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Contact: Medical Information 617-341-6777

Show Show 19 study locations
Sponsors and Collaborators
Vertex Pharmaceuticals Incorporated
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Responsible Party: Vertex Pharmaceuticals Incorporated Identifier: NCT04353817    
Other Study ID Numbers: VX19-445-116
2019-003554-86 ( EudraCT Number )
First Posted: April 20, 2020    Key Record Dates
Last Update Posted: September 23, 2020
Last Verified: April 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: Details on Vertex data sharing criteria and process for requesting access can be found at: research/clinical-trial-data-sharing.

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: Yes
Additional relevant MeSH terms:
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Cystic Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Chloride Channel Agonists
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action