E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Fibrodysplasia ossificans progressiva |
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E.1.1.1 | Medical condition in easily understood language |
Fibrodysplasia ossificans progressiva (FOP) |
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E.1.1.2 | Therapeutic area | Diseases [C] - Musculoskeletal Diseases [C05] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10068715 |
E.1.2 | Term | Fibrodysplasia ossificans progressiva |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
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E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To determine the efficacy of INCB000928 for the prevention of new HO in participants with FOP. |
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E.2.2 | Secondary objectives of the trial |
- To further evaluate the efficacy of INCB000928 in the reduction of flares and improvement in flare-related symptoms. - To evaluate the safety and tolerability of INCB000928 in participants with FOP. - To further evaluate the efficacy of INCB000928 in participants with FOP. - To confirm the efficacy of INCB000928 at Week 48 in participants randomized to placebo during the double-blind period. - To characterize the PK of INCB000928 in participants with FOP. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Informed consent/assent: a. For adult participants (≥ 18 years of age), ability to comprehend and willingness to sign an ICF. b. For adolescent participants (≥ 12 to < 18 years of age), written informed consent of the parent(s) or legal guardian and written assent from the adolescent participant. 2. Female and male adults and adolescents ≥ 12 years of age. 3. Clinical diagnosis of FOP (based on findings of congenital malformation of the great toes, episodic soft-tissue swelling, and/or progressive HO). 4. Participant-reported FOP disease activity within 1 year of the screening visit. This is defined as pain, swelling, and other signs and symptoms associated with FOP flare-ups or worsening of joint function or radiographic progression of HO (increase in site or number of HO lesions) with or without an association with flare-up episodes. 5. Ability to swallow and retain orally administered tablets, either whole or crushed and dispersed in foods or liquids, or ability to receive and retain crushed tablets via a feeding tube 6. Willingness to avoid pregnancy or fathering children based on the criteria below. a. Male participants with reproductive potential must agree to take appropriate precautions to avoid fathering children from screening through 90 days after the last dose of study drug and must refrain from donating sperm during this period. b. Female participants of childbearing potential must have a negative pregnancy test at screening (serum) and before the first dose on Day 1 (urine). Female participants of childbearing potential must agree to take appropriate precautions to avoid pregnancy from screening through 190 days after the last dose of study drug c. Women without childbearing potential are eligible. 7. Willing and able to undergo low-dose WBCT (excluding the head) imaging without requiring intubation. 8. Willing and able to comply with study procedures and requirements and attend all study visits as defined in this Protocol. |
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E.4 | Principal exclusion criteria |
1. Pregnant or breast-feeding. 2. CAJIS score ≥ 24. 3. FOP disease severity that in the investigator's opinion precludes participation 4. History of uncontrolled or unstable cardiovascular, respiratory, renal, gastrointestinal, endocrine, hematopoietic, psychiatric, and/or neurological disease within 6 months of screening. 5. Any clinically significant medical condition other than FOP that would, in the investigator's judgment, interfere with full participation in the study, pose a significant risk to the participant, or interfere with interpretation of study data. 6. Presence of a clinically significant finding on echocardiogram 7. Presence of an abnormal finding on ECG at screening that in the investigator's opinion is clinically significant and/or the following ECG parameters: QTcF interval > 450 milliseconds, QRS interval > 120 milliseconds, PR interval > 220 milliseconds, ECG evidence of Brugada syndrome, atrial fibrillation or atrial flutter, or Mobitz II or higher grade atrioventricular block. 8. Current treatment with a potent/strong inhibitor or inducer of CYP3A4 within 5 half-lives before the first dose of study treatment or expected to receive such treatment during the study 9. Use of the following medications: a. Imatinib 30 days prior to baseline b. Any medication that might interfere with HO formation in the 30 days or 5 half lives, whichever is longer before baseline. 10. Participation in an investigational drug study for the treatment of FOP or any other indication within 90 days or 5 half lives, whichever is longer before baseline. 11. Planning to receive a live vaccine during the course of the study or within 6 weeks after the last dose of study drug. 12. Known or suspected allergy to INCB000928 or any component of the study drug. 13. Known history of clinically significant drug or alcohol abuse as defined by the investigator in the l year before baseline 14. Chronic or current active infectious disease requiring systemic antibiotic, antifungal, or antiviral treatment. 15. HIV, HBV, or HCV infection. 16. Participants with laboratory values at screening defined in protocol 17. Weight < 30 kg at screening. 18. The following participants are excluded in France: a) Vulnerable populations according to article L.1121-6 of the French Public Health Code; b) Adults under legal protection or who are unable to express their consent per article L.1121-8 of the French Public Health Code; c) Individuals not affiliated with the social security system. |
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E.5 End points |
E.5.1 | Primary end point(s) |
• Total volume of new HO as assessed by low-dose WBCT (excluding the head) at Week 24. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Week 24 and Safety assessments will be performed throughout the study |
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E.5.2 | Secondary end point(s) |
• Total number of new flares (annualized) from baseline to Week 24. • Proportion of participants with a clinically meaningful improvement in the flare-related symptoms assessed by the FOP-PROMPT at Week 24. • Frequency and severity of AEs and SAEs, including the results of vital signs, ECGs, echocardiograms, physical examinations, PFTs, BMD, laboratory data, and knee epiphyseal closure (≥ 12 to < 21 years of age). • Proportion of participants with new HO over the 24-week period. • Total number of new HO lesions as assessed by low-dose WBCT (excluding the head) from baseline to Week 24. • Total volume of new HO as assessed by low-dose WBCT (excluding the head) from Week 24 to Week 48 compared to baseline to Week 24 in participants randomized to placebo during the double-blind period. • Total number of new flares (annualized) from Week 24 to Week 48 compared to baseline to Week 24 in participants randomized to placebo during the double-blind period. • Proportion of participants with new HO from Week 24 to Week 48 compared to baseline to Week 24 in participants randomized to placebo during the double-blind period. • Number of new HO lesions as assessed by low-dose WBCT (excluding the head) from Week 24 to Week 48 compared to baseline to Week 24 in participants randomized to placebo during the double-blind period. • INCB000928 PK for plasma and or saliva: Cmax, tmax, Cmin, and AUCt.
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Week 24 and Week 48 and Safety assessments will be performed throughout the study |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 7 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Chile |
New Zealand |
Switzerland |
Australia |
Brazil |
Canada |
China |
Korea, Republic of |
Mexico |
South Africa |
Turkey |
United Kingdom |
United States |
France |
Germany |
Italy |
Netherlands |
Portugal |
Spain |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 2 |
E.8.9.1 | In the Member State concerned days | 7 |
E.8.9.2 | In all countries concerned by the trial years | 3 |
E.8.9.2 | In all countries concerned by the trial months | 6 |