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 |
Swelling and/or painful attacks in teenagers and adults with Hereditary Angioedema (HAE).
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E.1.1.2 | Therapeutic area | Diseases [C] - Cardiovascular Diseases [C14] |
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 | 10019860 |
E.1.2 | Term | Hereditary angioedema |
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 |
The primary objective of this study is to demonstrate superior efficacy of SC administration of 2000 IU C1 esterase inhibitor [human] liquid for injection for the prevention of angioedema attacks relative to placebo based on the normalized number of attacks (NNA) during a treatment period. |
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E.2.2 | Secondary objectives of the trial |
The key secondary objective is to demonstrate the superior efficacy of SC administration of 2000 IU C1 esterase inhibitor [human] liquid for injection for the prevention of angioedema attacks relative to placebo as measured by the proportion of subjects meeting the criterion of at least 50% reduction in the NNA during the 2000 IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period:
1. The proportion of subjects meeting the criterion of at least a 50% reduction in the NNA during the 2000 IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period.
2. The NNA during each treatment period excluding the first 2 weeks.
3. The proportion of subjects meeting the criterion of at least a 50% reduction in the NNA for the 2000IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period excluding the first 2 weeks of each treatment period. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Be ≥12 years of age, or in Germany and Israel, be ≥18 years of age.
2. Have a diagnosis of HAE (Type I or II) and a functional C1 INH level less than 50% of normal.
3. Meet one of the following criteria (attack rate may be based on subject recall in conjunction with the subject’s medical records):
a. If subject is adult (>18 years of age) and currently receiving prophylactic therapy with C1 INH, have a history of ≥2.0 angioedema attacks per month (average) during the 3 consecutive months prior to starting prevention therapy.
OR
b. If subject is adolescent (>12 and <18 years of age) or adult and not receiving
prophylactic therapy with C1 INH, have a history of ≥2.0 angioedema attacks
per month (average) during the 3 consecutive months prior to the screening
visit.
OR
c. If subject is adult (>18 years of age) and currently receiving a stable dose of
attenuated androgens, have a history of ≥2.0 angioedema attacks per month
(average) during the 3 consecutive months prior to the screening visit.
4. For subjects ≥18 years of age, be willing to receive treatment with icatibant for any angioedema attacks that occur during the study that, in the opinion of the healthcare care provider, require medical intervention. Note: For subjects ≥12 to <18 years of age, standard of care therapy per local protocols should be provided.
5. Agree to adhere to the protocol-defined schedule of assessments.
6. If female, must have a negative serum beta human chorionic gonadotrophin (β-hCG) pregnancy test at the screening visit and must have a negative urine pregnancy test prior to the first dose of investigational product (Visit 1a), and agree to comply with any applicable contraceptive requirements of the protocol.
7. If male, be surgically sterile or agree to follow an acceptable method of birth control (eg, abstinence, barrier control) from the screening visit through 2 months after the last dose of investigational product.
8. If an adult (≥18 years of age), be informed of the nature of the study and provide written informed consent before any study-specific procedures.
OR
If a child (<18 years of age), have a parent(s)/legal guardian who is informed of the nature of the study provide written informed consent for the child to participate in the study before any study-specific procedures are performed (with assent from the child when appropriate). Alternatively, certain sites/Independent Reviewing Authorities may permit adolescents who are <18 years of age to be informed of the nature of the study and provide written informed consent without consent from a parent(s)/legal guardian. |
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E.4 | Principal exclusion criteria |
1. Adults (>18 years of age) receiving prophylactic IV CINRYZE that exceeds the approved dosing regimen of 1000 U every 3 or 4 days (receiving a weekly dose >2000 U).
2. Adolescents (>12 and <18 years of age) currently receiving prophylactic therapy with C1 INH (not applicable to Germany and Israel).
3. Have had signs or symptoms of an angioedema attack within 2 days prior to the first dose of investigational product in Treatment Period 1.
4. Have received any C1 INH therapy or any blood product for the treatment or prevention of angioedema attacks within 3 calendar days prior to the first dose of investigational product in Treatment Period 1.
5. If female, have started or changed the dose of any hormonal contraceptive regimen or hormone replacement therapy (ie, estrogen/progestin containing products) within 2 months prior to the screening visit.
6. Have a history of hypercoagulability (abnormal blood clotting) or other predisposition for thromboembolism.
7. Have a diagnosis of acquired angioedema or known presence of anti-C1 INH antibodies.
8. Have a history of allergic reaction to C1 INH products, including CINRYZE (or any components of CINRYZE), or other blood products, or FIRAZYR (icatibant).
9. Be pregnant or breastfeeding.
10. Have received an investigational drug within 30 days prior to the first dose of investigational product in Treatment Period 1.
11. Have, as determined by the investigator and/or the sponsor’s medical monitor, any surgical or medical condition (including positive for hepatitis B, hepatitis C, or HIV infection; alcohol, drug, or medication abuse within 1 year before screening; or mental condition rendering the subject or parent(s)/legal guardian unable to understand the nature, scope of the study, and possible consequences of the study), or relationship to study staff or sponsor (including people accommodated in an institution as well as people who are dependent on the sponsor, CRO, site or the investigator) that could interfere with the administration of investigational product or interpretation of study results.
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E.5 End points |
E.5.1 | Primary end point(s) |
The normalized number of attacks (NNA) recorded during each treatment period. The NNA is computed as the number of attacks per month (ie, 30.4 days) of exposure (NNA = 30.4 x [number of attacks during treatment period]/[days of treatment period]). If a subject discontinues during the treatment period, the denominator of the NNA will be the days on treatment for that subject; this is equivalent to the last observation carried forward imputation method to impute the missing information following the subject’s discontinuation |
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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) |
Key Secondary Efficacy Endpoints:
1. The proportion of subjects meeting the criterion of at least a 50% reduction in the NNA during the 2000 IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period.
2. The NNA excluding the first 2 weeks of each treatment period
3. The proportion of subjects meeting the criterion of at least 50% reduction in the NNA for the 2000 IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period excluding the first 2 weeks of each treatment period.
Key secondary endpoints 1 and 3 are defined as achieving a ≥ 50% reduction in the NNA (PR) during the 2000 IU C1 esterase inhibitor [human] liquid for injection treatment period relative to the placebo period.
The Key secondary endpoints 1 and 3 will be analyzed as the proportion of subjects meeting criterion PR. The null hypothesis is that PR is less than or equal to 0.2 and the alternative hypothesis is that PR is greater than 0.2. The proportion meeting criterion PR will be estimated with an exact 95% CI. The lower limit of the 95% CI for the proportion will be compared with 0.2.
Analysis of key secondary endpoint 2 will follow the same method (ie, the linear mixed effect model) used for the primary efficacy endpoint. |
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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 | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
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) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
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 | Yes |
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 | 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 | 10 |
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 |
Germany |
Hungary |
Israel |
Romania |
Spain |
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 | 1 |
E.8.9.1 | In the Member State concerned months | 3 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 1 |
E.8.9.2 | In all countries concerned by the trial months | 3 |
E.8.9.2 | In all countries concerned by the trial days | 0 |