E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Achondroplasia in Children |
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E.1.1.1 | Medical condition in easily understood language |
disproportionate short stature with shortened limbs |
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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 | LLT |
E.1.2 | Classification code | 10000452 |
E.1.2 | Term | Achondroplasia |
E.1.2 | System Organ Class | 100000004850 |
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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 |
Dose Escalation: Primary Objective:
To identify a dose of oral infigratinib, based on safety and efficacy evaluations, for children with achondroplasia (ACH) to be used for further study.
Dose Expansion: Primary Objective:
To provide preliminary evidence of efficacy of oral infigratinib for the treatment of ACH, as assessed by change from baseline in height velocity in children with ACH.
PK Substudy: Primary Objective:
To evaluate the pharmacokinetic (PK) profile of infigratinib and major active metabolites in children with ACH after administration of oral infigratinib. |
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E.2.2 | Secondary objectives of the trial |
Dose Escalation, Expansion, and PK Substudy Secondary Objectives
• To evaluate the safety and tolerability of oral infigratinib in children with ACH.
• To evaluate changes from baseline in anthropometric parameters after administration of oral infigratinib.
• To evaluate the pharmacokinetic and pharmacodynamic (PK/PD) profile of infigratinib in children with ACH after administration of oral infigratinib.
Exploratory Objective
• To evaluate changes in ACH disease burden
• To evaluate changes in biomarkers of infigratinib activity |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
- Signed informed consent by subject or parent(s) or legally authorized representative (LAR) and signed informed assent by the subject (when applicable).
- 3 to 11 years of age (inclusive) at screening. The PK Substudy will only enroll subjects ≥8 years old.
- Diagnosis of ACH, documented clinically and confirmed by genetic testing.
- If a girl ≥10 years of age, negative pregnancy test.
-.If sexually active, willing to use a highly effective method of contraception while taking study drug and for 3 months after the last dose of study drug.
- Subjects and parent(s) or LAR are willing and able to comply with study visits and study procedures.
- Able to swallow oral medication.
- Willing to stop consumption of grapefruit, grapefruit juice, grapefruit hybrids, pomegranates, star fruits, pomelos, Seville oranges, or products containing juice of these fruits while participating in the study; and have not consumed these within 7 days before the first dose of study drug. |
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E.4 | Principal exclusion criteria |
1. Hypochondroplasia or short stature condition other than ACH (eg, trisomy 21, pseudoachondroplasia, psychosocial short stature).
2. In females, having had their menarche.
3. Height < −2 or > +2 standard deviations for age and sex based on reference tables on growth in children with ACH (Horton 1978).
4. Annualized height velocity ≤1.5 cm/year over a period ≥6 months prior to screening.
5. Significant concurrent disease or condition that, in the view of the Investigator and/or Sponsor, would confound assessment of efficacy or safety of infigratinib, including but not limited to cardiac or vascular disease; hyperthyroidism; abnormal thyroid levels or recently diagnosed hypothyroidism that has not been stable on therapy for at least 3 months; insulin-requiring diabetes mellitus; adrenal insufficiency; autoimmune inflammatory disease; inflammatory bowel disease; presence of a functioning ventriculoperitoneal shunt; or diagnosis of severe sleep apnea (pre existing or done at screening based on the sleep
study) requiring surgery or continuous positive airway pressure (CPAP) machine.
6. Significant abnormality in screening laboratory results, including but not limited to the following:
a. Hemoglobin <10.0 g/dL.
b. Total bilirubin >1.5× upper limit of normal (ULN).
c. AST/SGOT or ALT/SGPT >2× ULN.
d. Calculated or measured creatinine clearance of <60 mL/min.
7. Current evidence of corneal or retinal disorder/keratopathy including, but not limited to, bullous/band keratopathy, corneal abrasion, inflammation/ulceration, or keratoconjunctivitis, confirmed by ophthalmic examination.
8. History and/or current evidence of extensive ectopic tissue calcification.
9. History of malignancy.
10. Currently receiving treatment with agents that are known strong inducers or inhibitors of CYP3A4 and medications which increase serum phosphorus and/or calcium concentration. Subjects are not permitted to receive vitamin D analogues for the treatment of vitamin D deficiency or to initiate multivitamin supplementation containing any form of vitamin D (Over-the-counter [OTC] multivitamin supplements containing vitamin D that were initiated ≥3 months before screening are allowed at the same dose). Subjects receiving medications that alter the pH of the gastrointestinal tract, including antacids, H2 antagonists (eg, ranitidine), and proton-pump inhibitors (eg, omeprazole); or enzyme-inducing antiepileptic drugs, including carbamazepine, phenytoin, phenobarbital, and primidone will be excluded.
11. Current evidence of endocrine alterations of calcium/phosphorus homeostasis:
a. Inorganic phosphorus outside of normal limits.
b. Total serum calcium (can be corrected) outside of normal limits.
12. Allergy to any components of the study drug.
13. Treatment with growth hormone, insulin-like growth factor 1 (IGF1), or anabolic steroids in the previous 6 months or long-term treatment (>3 months) at any time.
14. Treatment with a C-type natriuretic peptide (CNP) analog, fibroblast growth factor (FGF) ligand trap, or treatment targeting FGFR inhibition at any time.
15. Regular long-term treatment (≥3 weeks) with supraphysiologic doses of glucocorticoid therapy (ie, >15 mg/m2/day of hydrocortisone or equivalence) or treatment with glucocorticoids at anti-inflammatory doses for over 3 weeks within 6 months of the screening visit (low-dose ongoing inhaled steroid for asthma is acceptable).
16. Treatment with any other investigational product or investigational medical device for the treatment of ACH or short stature.
17. Previous limb-lengthening surgery or guided growth surgery.
18. Fracture within 6 months of screening (due to potential effects on bone biomarkers and bone morphology). |
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E.5 End points |
E.5.1 | Primary end point(s) |
Dose Escalation: Primary Endpoint
• Treatment-emergent adverse events (TEAEs) that lead to dose decrease or discontinuation.
• Change from baseline in height velocity (annualized to cm/year). (Baseline is defined as the annualized height velocity obtained from a minimum of 6 months of observation in the PROPEL study.)
Dose Expansion: Primary Endpoint
• Change from baseline in height velocity (annualized to cm/year).
PK Substudy: Primary Endpoint:
• PK parameters of infigratinib and major active metabolites (eg, Cmax, Clast, Tmax, AUC24, T1/2, AUCinf, CL/F, Vz/F, and Racc) |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
The evaluation is scheduled at 6, and 18 months for dose escalation, and 12 months for dose expansion.
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E.5.2 | Secondary end point(s) |
Dose Escalation, Dose Expansion, and PK Substudy
Secondary Endpoints
• Safety evaluations by incidence, type, severity, and causality of adverse events (AEs), serious adverse events (SAEs), laboratory test results (urinalysis, chemistry, hematology), clinically significant changes in vital signs, physical examination (including ophthalmic and dental evaluation), electrocardiograms, and imaging.
• Absolute height velocity (annualized to cm/year), expressed numerically and as Z-score in relation to non-ACH tables.
• Change from baseline in height velocity (annualized to cm/year) (for PK Substudy only).
• Absolute (expressed as absolute value and Z-score in relation to ACH and non-ACH standardized pediatric growth curves) and change from baseline in anthropometric parameters, including body proportions. Anthropometric measurements may include, but may not be limited to, standing height, sitting height, weight, head circumference, upper and lower arm length, thigh length, knee height, and arm span. Body proportion measurement ratios may include, but may not be limited to, upper to lower body segment ratio, upper arm to forearm length ratio, upper leg to lower leg length ratio, arm span to standing height ratio, and head circumference to standing height ratio.
• PK parameters (eg, Cmax and Tmax)
• Changes in PD parameters (biomarkers of bone turnover that may include type X collagen degradation fragment, collagen X marker [CXM]) (not applicable for the PK Substudy).
Exploratory Endpoint
• Changes in disease-specific complications, such as changes in mobility (assessed by elbow, hip, and knee range of motion), changes in the number of episodes of otitis media per year, changes in number of episodes and/or severity of sleep apnea, and changes in quality of life [QoL] as assessed by PedsQL (generic core scale short form, child and parent reports).
○ Baseline for range of motion and PedsQL will correspond to the values obtained at the baseline visit.
○ Baseline for the number of episodes of otitis media will be the number of episodes recorded during the PROPEL study [expressed as episodes/year].
○ Baseline f or sleep apnea, will correspond to the polysomnogram performed at screening [to rule out severe sleep apnea].)
• Phosphorylation change in extracellular signal-regulated kinases 1 and 2 (ERK1/2), signal transducers and activators of transcription (STATs) in blood cells |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
The evaluation is scheduled at 6, and 18 months for dose escalation, and 12 months for dose expansion.
For the complete list please refers to the protocol |
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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 | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | Yes |
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 | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | Yes |
E.8.1.7.1 | Other trial design description |
cohort dose escalation and dose expansion study, PK substudy |
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E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 6 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 12 |
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 |
Australia |
Canada |
France |
Spain |
United Kingdom |
United States |
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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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The end of trial is defined with LVLS. |
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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 | 3 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |
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 | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |