E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
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E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 18.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10051265 |
E.1.2 | Term | Spondyloarthropathy |
E.1.2 | System Organ Class | 10028395 - Musculoskeletal and connective tissue disorders |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To evaluate the efficacy of brodalumab in ankylosing spondylitis (AS) compared to placebo, as measured by the proportion of AS subjects achieving an Assessment of SpondyloArthritis international Society (ASAS) 20 response at week 16. |
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E.2.2 | Secondary objectives of the trial |
• To evaluate the efficacy of brodalumab in AS subjects on Ankylosing Spondylitis Disease Activity Score (ASDAS-CRP) change from baseline at week 16
• To evaluate the efficacy of brodalumab in the pooled population (AS and non-radiographic axial spondyloarthritis [nr-axSpA] subjects) on ASAS 20 at week 16
• To evaluate the efficacy of brodalumab in AS subjects as measured by ASAS 40 at week 16
• To evaluate the efficacy of brodalumab in the anti-TNF-experienced and anti-TNF-naïve subgroups as measured by ASAS 20 at week 16
• To describe the effect of brodalumab in subjects with nr-axSpA as measured by ASAS 20 at week 16 |
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E.2.3 | Trial contains a sub-study | Yes |
E.2.3.1 | Full title, date and version of each sub-study and their related objectives |
• Pharmacokinetic substudy:
To better characterize the pharmacokinetics of brodalumab in AS subjects following subcutaneous administration, additional pharmacokinetic samples will be collected with sparse sampling to determine the steady-state PK area under the concentration-time profile (AUC) in a small subset of subjects (n= 28).
• Longitudinal MRI substudy of the axial spine will be assessed in approximately 40 AS subjects at baseline and week 16.
• Biomarker Development:
Blood samples are to be assessed for biomarker development. A cell pellet from the blood plasma tube may be utilized to assess the impact of brodalumab on circulating immune cells via DNA methylation analysis, a pharmacodynamics assessment of methylation patterns of relevant genes.
• Pharmacogenetic Studies:
Focus on inherited genetic variations to evaluate their possible correlation to the disease and/or responsiveness to the therapies used in this study. The goals of the optional studies include the use of genetic markers to help in the investigation of inflammatory disease and/or to identify subjects who may have positive or negative responses to brodalumab.
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E.3 | Principal inclusion criteria |
Subject has provided informed consent prior to initiation of any study-specific activities/procedures.
Subject is ≥ 18 years of age at time of screening
Disease Related
- Subject fulfills the ASAS classification criteria of axial spondyloarthritis (with the exception of the Crohn's disease criterion) for > 3 months with age of onset < 45 years of age
AS subjects: Subject has radiographic evidence of sacroiliitis grade ≥ 2 bilaterally or grade 3 to 4 unilaterally (image must have been obtained ≤ 4 years from time of screening; centrally read)
OR
nr-axSpA subjects: Subject does not have radiographic evidence of sacroiliitis grade ≥ 2 bilaterally or grade 3 to 4 unilaterally (image must have been obtained ≤ 6 months from time of screening; centrally read)
AND
presence of inflammatory lesions of sacroiliac joint by MRI of Spondyloarthritis Research Consortium of Canada (SPARCC) level ≥ 2 (confirmed by a central
imaging reader)
- Subject has Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) score ≥ 4 at screening and baseline
- Subject has spinal pain score (BASDAI question #2) ≥ 4 at screening and baseline
- Subject has had adequate therapeutic trial (at least 4 weeks) of ≥ 2 non-steroidal anti-inflammatory drugs (NSAIDs) at the maximum recommended dose unless contraindicated or subject is intolerant.
- For subjects receiving non-biologic DMARDs (eg, methotrexate not to exceed 25 mg per week; sulfasalazine not to exceed 3000 mg per day) subject has
received treatment for ≥ 3 months, with a stable dose for ≥ 4 weeks prior to initiation of IMP.
- For subject receiving oral corticosteroids: the subject must be on a stable dose (not to exceed the equivalent of 10 mg of prednisone per day) for ≥ 4 weeks prior to initiation of IMP. |
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E.4 | Principal exclusion criteria |
Disease Related: Complete ankylosis of the spine
Other Medical Conditions
- Subject has known history of active tuberculosis (TB)
- .Subject has a positive test for tuberculosis during screening
. Subjects with a positive purified protein derivative (PPD) and a history of Bacillus Calmette-Guérin vaccination are allowed with a negative Quantiferon test.
. Subjects with a positive PPD test or subjects with a positive or indeterminate Quantiferon test are allowed if they have ALL of the following:
• no symptoms per tuberculosis worksheet provided by Amgen
• documented history of a completed course of adequate prophylaxis per local standard of care prior to the start of IMP
• no known exposure to a case of active tuberculosis after most recent prophylaxis
• no evidence of active tuberculosis on chest radiograph within 3 months prior to the first dose of IMP
- Subject has a planned surgical intervention between baseline and week 16
- Subject has an active infection or history of infections as follows:
• any active infection for which systemic anti-infectives were used within 28 days prior to the first IMP dose
• a serious infection, defined as requiring hospitalization or intravenous anti-infectives within 8 weeks prior to the first IMP dose recurrent or chronic infections or other active infection that, in the opinion of the investigator, might cause this study to be detrimental to the subject
- Subject has any systemic disease considered by the investigator to be clinically significant and uncontrolled.
- Subject has positive hepatitis B surface antigen, hepatitis B core antibody or hepatitis C virus antibody serology
- Subject had myocardial infarction, unstable angina pectoris or stroke within the past 12 months prior to the first IMP dose
- Subject has any active malignancy, including evidence of cutaneous basal or squamous cell carcinoma or melanoma.
- Subject has history of malignancy within the last 5 years EXCEPT treated and considered cured cutaneous basal or squamous cell carcinoma, in situ cervical cancer or in situ breast ductal carcinoma
- Subject has active Crohn's disease or a history of Crohn's disease
- Subject has active ulcerative colitis requiring daily use of immunosuppressive therapy
- Subject has had active fibromyalgia within the past 12 months
Laboratory Abnormalities
- Subject has any of the following laboratory abnormalities at screening:
• aspartate aminotransferase (AST) or alanine aminotransferase (ALT) > 2x the upper limit of normal (ULN)
• serum direct bilirubin ≥ 1.5 mg/dL (25.7 μmol/L)
• white blood cell (WBC) count < 3.00 x 109/L
• absolute neutrophil count (ANC) < 2.00 x 109/L
- Subject has any other laboratory abnormality, which, in the opinion of the investigator, will prevent the subject from completing the study or will interfere with the interpretation of the study results
Washouts or Other Treatments
- Subject has a prior history of >1 anti-TNF therapy for ankylosing spondylitis
- Subject has used commercially available or investigational biologic therapies for ankylosing spondylitis
General
- Subject has a history or evidence of suicidal ideation (severity of 4 or 5) or any suicidal behavior based on an assessment with the electronic Columbia-Suicide Severity Rating Scale (eC-SSRS) at screening or at baseline
- Subject has a history or evidence of a psychiatric disorder or substance abuse or any other mental health disorder that, in the opinion of the investigator, would pose a risk to subject safety or interfere with the study evaluation, procedures or completion.
- Subject has severe depression based on a total score of ≥ 15 on the Patient Health Questionnaire-8 (PHQ-8) at screening or baseline (note: subjects with a
total score of 10 to 14 on the PHQ-8 should be referred to a mental health care professional).
- Women who are pregnant or planning to become pregnant while on study through 8 weeks after the last dose of Amgen study drug.
- Women with a positive pregnancy test; women who have had a hysterectomy, bilateral oophorectomy, or bilateral salpingectomy or are post-menopausal per section 7.2.2.6 are not required to have pregnancy tests.
- Women of reproductive potential who are not willing to use an acceptable form of birth control during the study and for an additional 8 weeks after the last dose of study drug.
- Women who are lactating/breastfeeding or planning to breastfeed during the study and for an additional 8 weeks after the last dose of Amgen study drug.
For full detail, please refer to section 4.2 of the protocol.
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E.5 End points |
E.5.1 | Primary end point(s) |
ASAS 20 in AS subjects at week 16 |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
• ASDAS-CRP change from baseline in AS subjects at week 16
• ASAS 20 at week 16 in the pooled population (AS and nr-axSpA subjects)
• ASAS 40 at week 16 in AS subjects
• ASAS 20 at week 16 in anti-TNF-naïve AS subjects
• ASAS 20 at week 16 in anti-TNF-experienced AS subjects
• ASAS 20 at week 16 in nr-axSpA subjects |
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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 | 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 | Yes |
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 | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | Yes |
E.8.1.7.1 | Other trial design description |
16-week double-blind treatment period plus an open-label treatment period of up to 290 weeks |
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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 | 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
| 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 | 4 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 30 |
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 |
Canada |
Czech Republic |
France |
Germany |
Japan |
Poland |
Russian Federation |
Spain |
United Kingdom |
United States |
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E.8.7 | Trial has a data monitoring committee | No |
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 | 6 |
E.8.9.1 | In the Member State concerned months | 10 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 7 |