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Efficacy and Safety Study of Mavorixafor in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome

Primary Purpose

WHIM Syndrome

Status
Active
Phase
Phase 3
Locations
International
Study Type
Interventional
Intervention
Mavorixafor
Placebo
Sponsored by
X4 Pharmaceuticals
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for WHIM Syndrome

Eligibility Criteria

12 Years - undefined (Child, Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria for the Randomized Placebo-Controlled Period :

  • Have signed the current approved informed consent form. Participants under 18 years of age (in the Netherlands and other applicable regions, participants under 16 years of age) will sign an approved informed assent form and must also have a signed parental/legal guardian consent.
  • Have a genotype-confirmed mutation of chemokine (C-X-C motif) receptor 4 (CXCR4) consistent with WHIM phenotype.
  • Agree to use a highly effective form of contraception.
  • Be willing and able to comply with the protocol.
  • Have confirmed ANC ≤400 cells/µL during screening, obtained while participant has no clinical evidence of infection.

Inclusion Criteria for the Open-Label Period:

  • Completed the Randomized Period; or
  • Granted Early Release from the Randomized Period.

Exclusion Criteria:

  • Has known systemic hypersensitivity to the mavorixafor drug substance, its inactive ingredients, or the placebo.
  • Is pregnant or breastfeeding.
  • Has any medical or personal condition, which in the opinion of the Investigator may potentially compromise the safety or compliance of the participant or may preclude the participant's successful completion of the clinical study.

Sites / Locations

  • University of California San Diego Health/Rady Children's Hospital
  • California Dermatology Institute
  • University of Iowa
  • Johns Hopkins University Medical Center
  • University of Texas Southwestern Medical Center
  • University of Washington Medical Center
  • Wesley Hospital
  • Children's Health Queensland Hospital
  • Medical University of Vienna - Medizinische Universität Wien
  • Aarhus University Hospital
  • CHU de Lyon, Institut d'Hematologie et d'Oncologie Pediatrique
  • CHU Paris Est, Hôpital d'Enfants Armand-Trousseau
  • Hopital Necker-Enfants Malades
  • University of Debrecen, Affiliated Department of Infectology
  • HaEmek Medical Center
  • Università degli Studi di Brescia, Scienze Cliniche e Sperimentali
  • Seoul National University Hospital, Children's Hospital
  • Emma Children's Hospital Academic Medical Center (AMC)
  • Dmitry Rogachev National Research Center of Pediatric Hematology, Oncology and Immunology
  • Academician I.P. Pavlov First Saint Petersburg State Medical University
  • Hospital Sant Joan de Deu Barcelona
  • Hospital Universitario Virgen del Rocío
  • Cukurova University Faculty of Medicine

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Placebo Comparator

Arm Label

Mavorixafor

Placebo

Arm Description

Participants (adults and adolescents [12 to 17 years of age weighing >50 kilograms [kg]) will receive mavorixafor 400 milligrams (mg) once daily (QD) orally for 52 weeks in the Randomized Placebo-Controlled Period. Adolescents weighing ≤50 kg will receive mavorixafor 200 mg QD. Participants who complete the Randomized Placebo-Controlled Period or are granted Early Release due to recurrent or significant infections, as adjudicated by a blinded, independent adjudication committee (AC), will be offered the opportunity to enroll in the Open-Label Period and receive treatment with mavorixafor 400 mg once daily orally until commercial availability or study termination by the Sponsor.

Participants will receive placebo matching to mavorixafor QD orally for 52 weeks in the Randomized Placebo-Controlled Period. Participants who complete the Randomized Placebo-Controlled Period or are granted Early Release due to recurrent or significant infections, as adjudicated by a blinded, independent AC, will be offered the opportunity to enroll in the Open-Label Period and receive treatment with mavorixafor 400 mg once daily orally until commercial availability or study termination by the Sponsor.

Outcomes

Primary Outcome Measures

Randomized Placebo-Controlled Period: Time (in Hours) Above Threshold-Absolute Neutrophil Count (TAT-ANC in hours) of ≥ 500 Cells/Microliter (µL) over a 24-hour period
Open-Label Period: Percentage of Participants With Adverse Events (AEs)

Secondary Outcome Measures

Randomized Placebo-Controlled Period: Time (in Hours) Above Threshold-Absolute Lymphocyte Count (TAT-ALC) of ≥ 1000 Cells/µL over a 24-hour period
Randomized Placebo-Controlled Period: Composite Clinical Efficacy for Mavorixafor based on total infection score and total wart change score
Randomized Placebo-Controlled Period: Change From Baseline in Total Warts Score at Week 52
Randomized Placebo-Controlled Period: Total Infection Score for Mavorixafor
Randomized Placebo-Controlled Period: Time to Early Release
Randomized Placebo-Controlled Period: TAT-ALC of ≥ 1000 Cells/µL in Participants With Lymphopenia
Randomized Placebo-Controlled Period: Total Infection Score for Participants With Non-Immunoglobulin (non-Ig) Use (Percentage of Participants With Infections)
Randomized Placebo-Controlled Period: Change in Total Wart Score at Baseline, Based on Clinical Global Impression of Change (CGI-C)
Randomized Placebo-Controlled Period: Composite Clinical Efficacy (Total Infection Score and Total Wart Change Score) for Participants With Non-Ig Use
Composite clinical efficacy will be calculated using the total infection score and total wart change score for participants with warts at baseline or non-Ig use. It will be analyzed by a blinded, independent AC.
Randomized Placebo-Controlled Period: Change in Total Wart Score at Baseline (CGI-C), Based on Local Dermatologist Review
Randomized Placebo-Controlled Period: Participant Global Impression of Change (PGI-C)
Randomized Placebo-Controlled Period: Participant Global Impression of Severity (PGI-S)
Randomized Placebo-Controlled Period: Vaccine Titer Levels at Week 52 in Participants Vaccinated at Week 13, With Tetanus, Diphtheria, and Pertussis (Tdap) Including Pertussis Toxin, and Tetanus
Randomized Placebo-Controlled Period: Vaccine Titer Levels at Week 52 for Human Papillomavirus (HPV) 16 and HPV 18 in Participants Receiving Vaccinations With HPV 9-Valent Vaccine, Recombinant (Gardasil®9)
Randomized Placebo-Controlled Period: Change From Baseline in Clinical Global Impression of Severity (CGI-S), Based on Local Dermatologist Review
Randomized Placebo-Controlled Period: Number of Participants with Infections
Randomized Placebo-Controlled Period: Infection-Free Time
Randomized Placebo-Controlled Period: Number of Days Lost From Work/School
Randomized Placebo-Controlled Period: Quality of Life as Measured by 36-Item Short Form Survey Score
Randomized Placebo-Controlled Period: Quality of Life as Measured by EuroQoL-5 Dimension-5 Level (EQ-5D-5L) Score
Randomized Placebo-Controlled Period: Quality of Life as Measured by Life Quality Index (LQI) Score
Randomized Placebo-Controlled Period: Quality of Life as Measured by Dermatology LQI Score
Randomized Placebo-Controlled Period: Quality of Life as Measured by Pediatric Quality of Life Inventory (PedsQL) Score
Randomized Placebo-Controlled Period: Change From Baseline in Anogenital (AG) Warts Based on Dermatologist CGI-C Assessment
Randomized Placebo-Controlled Period: Change From Baseline in Anogenital (AG) Warts Based on AG Wart Severity Assessment
Randomized Placebo-Controlled Period: Number of Events Requiring Rescue Treatment Due to Infection
Randomized Placebo-Controlled Period: Number of Participants With Incidence and Duration of Hospitalizations Due to Infection
Randomized Placebo-Controlled Period: Number of Participants With Incidence of Newly Developed Warts
Randomized Placebo-Controlled Period: Area Under the Curve for ANC (AUCANC) Using Trapezoidal Method
Randomized Placebo-Controlled Period: Percentage of Neutrophil Responders
Randomized Placebo-Controlled Period: Mavorixafor Treatment Group: AUCANC
Randomized Placebo-Controlled Period: Area Under the Curve for ALC (AUCALC)
Randomized Placebo-Controlled Period: Percentage of Lymphocyte Responders
Randomized Placebo-Controlled Period: Change From Baseline in Total ALC, Absolute Monocyte Count (AMC), ANC, and White Blood Cell (WBC) at Week 52
Absolute and Fold Change From Baseline in Absolute T, B and Natural Killer Lymphocyte at Week 52
Randomized Placebo-Controlled Period: Number of Participants With AEs
Randomized Placebo-Controlled Period: Pharmacokinetics (PK), Maximum Observed Plasma Concentration (Cmax) of Mavorixafor
Randomized Placebo-Controlled Period: PK, Time to Reach Cmax (Tmax) of Mavorixafor
Randomized Placebo-Controlled Period: PK, Half-Life of (T1/2) of Mavorixafor
Randomized Placebo-Controlled Period: PK, Area Under the Curve (AUC) of Mavorixafor
Open-Label Period: Percentage of Neutrophil Responders
Open-Label Period: Percentage of Lymphocyte Responders
Open-Label Period: Absolute and Fold Change From Baseline in Total ALC, AMC, ANC, and WBC at Week 52
Open-Label Period: Vaccine Titer Levels During the First Year of Open-Label Period, in Participants Vaccinated With Tdap During the Study Including Pertusis Toxin and Tetanus
Open-Label Period: Vaccine Titer Levels During the First Year of the Open-Label Period for HPV 16 and HPV 18 in Participants Receiving Vaccinations With HPV 9-Valent Vaccine, Recombinant (Gardasil®9) During the Study
Open-Label Period: Change From Baseline in Cutaneous Warts at Week 52, Based on Central Review of CGI-C
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Central Review of CGI-S
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Local Dermatologist CGI-C
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Local Dermatologist CGI-S
Open-Label Period: Change Over Time in PGI-C
Open-Label Period: Change Over Time in PGI-S
Open-Label Period: Total Infection Score (Percentage of Participants With Infections)

Full Information

First Posted
June 19, 2019
Last Updated
October 3, 2023
Sponsor
X4 Pharmaceuticals
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1. Study Identification

Unique Protocol Identification Number
NCT03995108
Brief Title
Efficacy and Safety Study of Mavorixafor in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome
Official Title
A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Multicenter Study of Mavorixafor in Patients With WHIM Syndrome With Open-Label Extension
Study Type
Interventional

2. Study Status

Record Verification Date
October 2023
Overall Recruitment Status
Active, not recruiting
Study Start Date
October 24, 2019 (Actual)
Primary Completion Date
October 10, 2022 (Actual)
Study Completion Date
December 2024 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
X4 Pharmaceuticals

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This study has a double-blind, Randomized Placebo-Controlled Period and an Open-Label Period. The primary objective of the Randomized Placebo-Controlled Period is to demonstrate the efficacy of mavorixafor in participants with WHIM syndrome as assessed by increasing levels of circulating neutrophils compared with placebo, and relative to a clinically meaningful threshold. The primary objective of the Open-Label Period is to evaluate the safety and tolerability of mavorixafor in participants with WHIM syndrome. Participants are allowed to continue treatment in the Open-Label Period, if regionally applicable, until mavorixafor becomes commercially available, or until the study is terminated by the Sponsor.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
WHIM Syndrome

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 3
Interventional Study Model
Parallel Assignment
Masking
ParticipantInvestigator
Allocation
Randomized
Enrollment
31 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Mavorixafor
Arm Type
Experimental
Arm Description
Participants (adults and adolescents [12 to 17 years of age weighing >50 kilograms [kg]) will receive mavorixafor 400 milligrams (mg) once daily (QD) orally for 52 weeks in the Randomized Placebo-Controlled Period. Adolescents weighing ≤50 kg will receive mavorixafor 200 mg QD. Participants who complete the Randomized Placebo-Controlled Period or are granted Early Release due to recurrent or significant infections, as adjudicated by a blinded, independent adjudication committee (AC), will be offered the opportunity to enroll in the Open-Label Period and receive treatment with mavorixafor 400 mg once daily orally until commercial availability or study termination by the Sponsor.
Arm Title
Placebo
Arm Type
Placebo Comparator
Arm Description
Participants will receive placebo matching to mavorixafor QD orally for 52 weeks in the Randomized Placebo-Controlled Period. Participants who complete the Randomized Placebo-Controlled Period or are granted Early Release due to recurrent or significant infections, as adjudicated by a blinded, independent AC, will be offered the opportunity to enroll in the Open-Label Period and receive treatment with mavorixafor 400 mg once daily orally until commercial availability or study termination by the Sponsor.
Intervention Type
Drug
Intervention Name(s)
Mavorixafor
Other Intervention Name(s)
AMD11070, X4P-001
Intervention Description
Mavorixafor provided as 100 mg capsules.
Intervention Type
Drug
Intervention Name(s)
Placebo
Intervention Description
Placebo matching to mavorixafor capsules
Primary Outcome Measure Information:
Title
Randomized Placebo-Controlled Period: Time (in Hours) Above Threshold-Absolute Neutrophil Count (TAT-ANC in hours) of ≥ 500 Cells/Microliter (µL) over a 24-hour period
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 min (each ± 5 min) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 min) post-dose at Baseline, Weeks 13, 26, 39, and 52
Title
Open-Label Period: Percentage of Participants With Adverse Events (AEs)
Time Frame
From Day 1 (end of randomized period) up to end of study (30 days post-treatment in open-label period [Week 56 of open-label period])
Secondary Outcome Measure Information:
Title
Randomized Placebo-Controlled Period: Time (in Hours) Above Threshold-Absolute Lymphocyte Count (TAT-ALC) of ≥ 1000 Cells/µL over a 24-hour period
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Baseline, Weeks 13, 26, 39, and 52
Title
Randomized Placebo-Controlled Period: Composite Clinical Efficacy for Mavorixafor based on total infection score and total wart change score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Change From Baseline in Total Warts Score at Week 52
Time Frame
Baseline, Week 52
Title
Randomized Placebo-Controlled Period: Total Infection Score for Mavorixafor
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Time to Early Release
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: TAT-ALC of ≥ 1000 Cells/µL in Participants With Lymphopenia
Time Frame
Baseline
Title
Randomized Placebo-Controlled Period: Total Infection Score for Participants With Non-Immunoglobulin (non-Ig) Use (Percentage of Participants With Infections)
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Change in Total Wart Score at Baseline, Based on Clinical Global Impression of Change (CGI-C)
Time Frame
Baseline
Title
Randomized Placebo-Controlled Period: Composite Clinical Efficacy (Total Infection Score and Total Wart Change Score) for Participants With Non-Ig Use
Description
Composite clinical efficacy will be calculated using the total infection score and total wart change score for participants with warts at baseline or non-Ig use. It will be analyzed by a blinded, independent AC.
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Change in Total Wart Score at Baseline (CGI-C), Based on Local Dermatologist Review
Time Frame
Baseline
Title
Randomized Placebo-Controlled Period: Participant Global Impression of Change (PGI-C)
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Participant Global Impression of Severity (PGI-S)
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Vaccine Titer Levels at Week 52 in Participants Vaccinated at Week 13, With Tetanus, Diphtheria, and Pertussis (Tdap) Including Pertussis Toxin, and Tetanus
Time Frame
Week 52
Title
Randomized Placebo-Controlled Period: Vaccine Titer Levels at Week 52 for Human Papillomavirus (HPV) 16 and HPV 18 in Participants Receiving Vaccinations With HPV 9-Valent Vaccine, Recombinant (Gardasil®9)
Time Frame
Week 52
Title
Randomized Placebo-Controlled Period: Change From Baseline in Clinical Global Impression of Severity (CGI-S), Based on Local Dermatologist Review
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Number of Participants with Infections
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Infection-Free Time
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Number of Days Lost From Work/School
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Quality of Life as Measured by 36-Item Short Form Survey Score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Quality of Life as Measured by EuroQoL-5 Dimension-5 Level (EQ-5D-5L) Score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Quality of Life as Measured by Life Quality Index (LQI) Score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Quality of Life as Measured by Dermatology LQI Score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Quality of Life as Measured by Pediatric Quality of Life Inventory (PedsQL) Score
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Change From Baseline in Anogenital (AG) Warts Based on Dermatologist CGI-C Assessment
Time Frame
Baseline to Week 52
Title
Randomized Placebo-Controlled Period: Change From Baseline in Anogenital (AG) Warts Based on AG Wart Severity Assessment
Time Frame
Baseline to Week 52
Title
Randomized Placebo-Controlled Period: Number of Events Requiring Rescue Treatment Due to Infection
Time Frame
Baseline to Week 52
Title
Randomized Placebo-Controlled Period: Number of Participants With Incidence and Duration of Hospitalizations Due to Infection
Time Frame
Baseline to Week 52
Title
Randomized Placebo-Controlled Period: Number of Participants With Incidence of Newly Developed Warts
Time Frame
Baseline to Week 52
Title
Randomized Placebo-Controlled Period: Area Under the Curve for ANC (AUCANC) Using Trapezoidal Method
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Baseline, Weeks 13, 26, 39, and 52
Title
Randomized Placebo-Controlled Period: Percentage of Neutrophil Responders
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Mavorixafor Treatment Group: AUCANC
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Baseline, Weeks 13, 26, 39, and 52
Title
Randomized Placebo-Controlled Period: Area Under the Curve for ALC (AUCALC)
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Baseline, Weeks 13, 26, 39, and 52
Title
Randomized Placebo-Controlled Period: Percentage of Lymphocyte Responders
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Change From Baseline in Total ALC, Absolute Monocyte Count (AMC), ANC, and White Blood Cell (WBC) at Week 52
Time Frame
Baseline, Week 52
Title
Absolute and Fold Change From Baseline in Absolute T, B and Natural Killer Lymphocyte at Week 52
Time Frame
Baseline, Week 52
Title
Randomized Placebo-Controlled Period: Number of Participants With AEs
Time Frame
Baseline up to Week 52
Title
Randomized Placebo-Controlled Period: Pharmacokinetics (PK), Maximum Observed Plasma Concentration (Cmax) of Mavorixafor
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Weeks 13, 26, 39, and 52; and 4 hours post-dose at Baseline
Title
Randomized Placebo-Controlled Period: PK, Time to Reach Cmax (Tmax) of Mavorixafor
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 min (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Weeks 13, 26, 39, and 52; and 4 hours post-dose at Baseline
Title
Randomized Placebo-Controlled Period: PK, Half-Life of (T1/2) of Mavorixafor
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Weeks 13, 26, 39, and 52; and 4 hours post-dose at Baseline
Title
Randomized Placebo-Controlled Period: PK, Area Under the Curve (AUC) of Mavorixafor
Time Frame
Time 0 (pre-dose, up to 15 minutes prior), 30, 60, and 90 minutes (each ± 5 minutes) and 2, 3, 4, 8, 12, 16, and 24 hours (each ± 15 minutes) post-dose at Weeks 13, 26, 39, and 52; and 4 hours post-dose at Baseline
Title
Open-Label Period: Percentage of Neutrophil Responders
Time Frame
Baseline up to Week 52 of open-label period
Title
Open-Label Period: Percentage of Lymphocyte Responders
Time Frame
Baseline up to Week 52 of open-label period
Title
Open-Label Period: Absolute and Fold Change From Baseline in Total ALC, AMC, ANC, and WBC at Week 52
Time Frame
Baseline up to Week 52 of open-label period
Title
Open-Label Period: Vaccine Titer Levels During the First Year of Open-Label Period, in Participants Vaccinated With Tdap During the Study Including Pertusis Toxin and Tetanus
Time Frame
Year 1 of open-label period
Title
Open-Label Period: Vaccine Titer Levels During the First Year of the Open-Label Period for HPV 16 and HPV 18 in Participants Receiving Vaccinations With HPV 9-Valent Vaccine, Recombinant (Gardasil®9) During the Study
Time Frame
Year 1 of open-label period
Title
Open-Label Period: Change From Baseline in Cutaneous Warts at Week 52, Based on Central Review of CGI-C
Time Frame
Baseline, Week 52 of open-label period
Title
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Central Review of CGI-S
Time Frame
Baseline, Week 52 of open-label period
Title
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Local Dermatologist CGI-C
Time Frame
Baseline, Week 52 of open-label period
Title
Open-Label Period: Change From Baseline in Cutaneous Warts, Based on Local Dermatologist CGI-S
Time Frame
Baseline, Week 52 of open-label period
Title
Open-Label Period: Change Over Time in PGI-C
Time Frame
Baseline up to Week 52 of open-label period
Title
Open-Label Period: Change Over Time in PGI-S
Time Frame
Baseline up to Week 52 of open-label period
Title
Open-Label Period: Total Infection Score (Percentage of Participants With Infections)
Time Frame
Baseline up to Week 52 of open-label period

10. Eligibility

Sex
All
Minimum Age & Unit of Time
12 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria for the Randomized Placebo-Controlled Period : Have signed the current approved informed consent form. Participants under 18 years of age (in the Netherlands and other applicable regions, participants under 16 years of age) will sign an approved informed assent form and must also have a signed parental/legal guardian consent. Have a genotype-confirmed mutation of chemokine (C-X-C motif) receptor 4 (CXCR4) consistent with WHIM phenotype. Agree to use a highly effective form of contraception. Be willing and able to comply with the protocol. Have confirmed ANC ≤400 cells/µL during screening, obtained while participant has no clinical evidence of infection. Inclusion Criteria for the Open-Label Period: Completed the Randomized Period; or Granted Early Release from the Randomized Period. Exclusion Criteria: Has known systemic hypersensitivity to the mavorixafor drug substance, its inactive ingredients, or the placebo. Is pregnant or breastfeeding. Has any medical or personal condition, which in the opinion of the Investigator may potentially compromise the safety or compliance of the participant or may preclude the participant's successful completion of the clinical study.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Chief Medical Officer
Organizational Affiliation
X4 Pharmaceuticals
Official's Role
Study Director
Facility Information:
Facility Name
University of California San Diego Health/Rady Children's Hospital
City
San Diego
State/Province
California
ZIP/Postal Code
92123
Country
United States
Facility Name
California Dermatology Institute
City
Thousand Oaks
State/Province
California
ZIP/Postal Code
91320
Country
United States
Facility Name
University of Iowa
City
Iowa City
State/Province
Iowa
ZIP/Postal Code
52242
Country
United States
Facility Name
Johns Hopkins University Medical Center
City
Baltimore
State/Province
Maryland
ZIP/Postal Code
21224
Country
United States
Facility Name
University of Texas Southwestern Medical Center
City
Dallas
State/Province
Texas
ZIP/Postal Code
75390-9020
Country
United States
Facility Name
University of Washington Medical Center
City
Seattle
State/Province
Washington
ZIP/Postal Code
98195
Country
United States
Facility Name
Wesley Hospital
City
Auchenflower
State/Province
Queensland
ZIP/Postal Code
4006
Country
Australia
Facility Name
Children's Health Queensland Hospital
City
South Brisbane
State/Province
Queensland
ZIP/Postal Code
4101
Country
Australia
Facility Name
Medical University of Vienna - Medizinische Universität Wien
City
Wien
ZIP/Postal Code
1090
Country
Austria
Facility Name
Aarhus University Hospital
City
Aarhus
ZIP/Postal Code
8000
Country
Denmark
Facility Name
CHU de Lyon, Institut d'Hematologie et d'Oncologie Pediatrique
City
Lyon
State/Province
Rhne
ZIP/Postal Code
69008
Country
France
Facility Name
CHU Paris Est, Hôpital d'Enfants Armand-Trousseau
City
Paris Cedex 12
ZIP/Postal Code
75571
Country
France
Facility Name
Hopital Necker-Enfants Malades
City
Paris
ZIP/Postal Code
75743
Country
France
Facility Name
University of Debrecen, Affiliated Department of Infectology
City
Debrecen
State/Province
Hajdu-Bihar
ZIP/Postal Code
H-4031
Country
Hungary
Facility Name
HaEmek Medical Center
City
Afula
ZIP/Postal Code
1834111
Country
Israel
Facility Name
Università degli Studi di Brescia, Scienze Cliniche e Sperimentali
City
Brescia
State/Province
Piazza Del Mercato
ZIP/Postal Code
25123
Country
Italy
Facility Name
Seoul National University Hospital, Children's Hospital
City
Seoul
ZIP/Postal Code
03080
Country
Korea, Republic of
Facility Name
Emma Children's Hospital Academic Medical Center (AMC)
City
Amsterdam
ZIP/Postal Code
1105 AZ
Country
Netherlands
Facility Name
Dmitry Rogachev National Research Center of Pediatric Hematology, Oncology and Immunology
City
Moscow
ZIP/Postal Code
117997
Country
Russian Federation
Facility Name
Academician I.P. Pavlov First Saint Petersburg State Medical University
City
Saint Pertersburg
ZIP/Postal Code
197022
Country
Russian Federation
Facility Name
Hospital Sant Joan de Deu Barcelona
City
Barcelona
State/Province
Esplugues De Llobregat
ZIP/Postal Code
8950
Country
Spain
Facility Name
Hospital Universitario Virgen del Rocío
City
Seville
State/Province
Sevilla
ZIP/Postal Code
41013
Country
Spain
Facility Name
Cukurova University Faculty of Medicine
City
Sarıcam
State/Province
Adana
ZIP/Postal Code
1330
Country
Turkey

12. IPD Sharing Statement

Learn more about this trial

Efficacy and Safety Study of Mavorixafor in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome

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