E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Duchenne's Muscular Dystrophy |
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E.1.1.1 | Medical condition in easily understood language |
Duchenne's Muscular Dystrophy |
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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 | 19.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10013801 |
E.1.2 | Term | Duchenne muscular dystrophy |
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 evaluate the long-term safety of IV dosing of PF-06252616 in boys with DMD. |
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E.2.2 | Secondary objectives of the trial |
- To evaluate the long-term efficacy of PF-06252616 using functional assessments and
strength.
- To assess the PK and immunogenicity of PF-06252616. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Subjects with Duchenne muscular dystrophy who enrolled and completed through Week 97 of Study B5161002.
2. Evidence of a personally signed and dated informed consent document (ICD) indicating that the subject’s parent or legal guardian/caregiver has been informed of all pertinent aspects of the study. Subjects may be required to provide assent in compliance with local regulations and IRB requirements.
3. Subjects and their legal guardians/caregivers who are willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures.
4. The following inclusion criteria will be assessed using data from the B5161002 study, and if data are unavailable, these assessments must be completed prior to enrollment:
a. Adequate hepatic function on screening laboratory assessments from the Week 97 visit.
b. GLDH ≤ 20 units/liter (2 x upper limit of normal [ULN]) from the Week 97 visit.
c. Iron content estimate on the liver MRI within the normal range as determined by R2* value (R2*≤75 Hz at 1.5 T or R2*≤139 Hz at 3.0 T) from the Week 93 visit. |
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E.4 | Principal exclusion criteria |
1. Unwilling or unable (eg, metal implants) to undergo examination with closed MRI. If subjects required sedation in the B5161002 study they will be permitted to enroll in the OLE. In the event that a subject becomes intolerant to MRI scanning, during the OLE, the subject may be separately consented to be administered sedation in order to complete the MRI.
2. All male subjects who are able to father children and are sexually active and at risk for impregnating a female partner, who are unwilling or unable to use with their female partner(s) a highly effective method of contraception consistently and correctly for the duration of the active treatment period and through the final study visit. In addition, all sexually active male subjects who are unwilling or unable to prevent potential transfer of and exposure to drug through semen to their partners by using a condom consistently and
correctly, beginning with the first dose of investigational product and continuing through the final study visit.
3. Subjects who are investigational site staff members directly involved in the conduct of the study and their family members, site staff members otherwise supervised by the Investigator, or subjects who are related to Pfizer employees directly involved in the conduct of the study.
4. Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the subject inappropriate for entry into this study.
5. Participation in other studies involving investigational drug(s), with the exception of B5161002, for a minimum of 30 days or within 5 half-lives (whichever is longer) prior to signing the informed consent and/or during study participation.
6. History of allergic or anaphylactic reaction to a therapeutic or diagnostic protein or additives of this investigational product (histidine, sucrose, edetic acid [ethylenediaminetetraacetic acid], and polysorbate 80). |
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E.5 End points |
E.5.1 | Primary end point(s) |
Safety:
- Incidence and/or rate of intolerability or dose limiting treatment related AEs following up to 4 years of treatment.
- Incidence and/or rate, severity and causal relationship of TEAEs and withdrawals due to TEAEs following up to 4 years of treatment.
- Incidence and magnitude of abnormal laboratory findings (clinical laboratory tests: hematology, chemistry, GGT, GLDH, PT, aPTT, creatine kinase, amylase, serum ferritin, serum iron, total iron binding capacity (TIBC), % transferrin saturation. Hormones: luteinizing hormone [LH], follicle stimulating hormone [FSH], thyroxine [T4], thyroid stimulating hormone [TSH]. Fecal occult blood, cardiac Troponin I and urinalysis) following up to 4 years of treatment.
- Abnormal and clinically relevant changes in liver MRI and physical examinations (including nose and throat mucosal exam and Tanner stage and Testicular Volume), weight, vitals, electrocardiogram (ECG), LVEF measured by cardiac MRI (or echocardiogram), bone mineral density by DXA, x-ray (hand and wrist for bone age evaluation) and C-SSRS.
Efficacy:
- Mean change from baseline following up to 4 years of treatment in the following functional assessment tests PFTs (to include FVC, FEV1 and PEFR), 4SC, NSAA, PUL, ROM and 6MWD.
- Mean change from baseline in muscle strength measured by myometry following up to 4 years of treatment. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
To evaluate change from baseline of Lean Body Mass (LBM) determined via whole body DXA after up to 4 years of treatment. |
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E.5.2 | Secondary end point(s) |
Efficacy:
- Mean change from baseline following up to 4 years of treatment in the following functional assessment tests PFTs (to include FVC, FEV1 and PEFR), 4SC, NSAA, PUL, ROM and 6MWD.
- Mean change from baseline in muscle strength measured by myometry following up to 4 years of treatment.
PK and Immunogenicity:
Trough serum PF-06252616 concentrations for all subjects receiving active drug.
- Incidence of ADA and NAb. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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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 | Yes |
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 | 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 | No |
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.8.2.4 | Number of treatment arms in the trial | 3 |
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 | 3 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 8 |
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 |
Bulgaria |
Canada |
Italy |
Japan |
Poland |
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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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 4 |
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 | 4 |
E.8.9.2 | In all countries concerned by the trial months | 6 |