E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Three forms of thrombotic microangiopathies (TMA):
- atypical hemolytic uremic syndrome (aHUS)
- hematopoietic stem cell transplant (HSCT)-associated TMA
- thrombotic thrombocytopenic purpura (TTP) |
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E.1.1.1 | Medical condition in easily understood language |
thrombosis in capillaries and arterioles |
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E.1.1.2 | Therapeutic area | Diseases [C] - Blood and lymphatic diseases [C15] |
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 | 10043645 |
E.1.2 | Term | Thrombotic microangiopathy |
E.1.2 | System Organ Class | 10005329 - Blood and lymphatic system 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 |
The co-primary objectives of this study are to:
• Assess the safety and tolerability of multiple-dose administration of OMS721 in subjects with TMA
• Evaluate the clinical activity of multiple-dose administration of OMS721 in subjects with TMA |
|
E.2.2 | Secondary objectives of the trial |
• Determine the pharmacokinetics (PK) of multiple-dose administration of OMS721 in subjects with TMA
• Determine the pharmacodynamics (PD) of multiple-dose administration of OMS721 in subjects with TMA
• Determine the immunogenicity of multiple-dose administration of OMS721 in subjects with TMA |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Competent to provide informed consent.
2. Voluntarily provide informed consent in accordance with regulations and governing ethics committee requirements prior to any procedures or evaluations performed specifically for the sole purpose of the study.
3. Are age ≥18 at screening (Visit 1).
4. Have a diagnosis of TMA in accordance with one of the following three categories:
• As of Amendment 10 of the Study Protocol, enrollment of aHUS
subjects is closed. Primary aHUS, diagnosed clinically and having ADAMTS13 activity >10% in plasma. Subjects are eligible with or without a documented complement mutation or anti-CFH antibody. Subjects are categorized according to their response to plasma therapy (plasma exchange or plasma infusion):
o Plasma therapy-resistant aHUS subjects must have all of the following: 1) screening platelet count < 150,000/μL despite at least four plasma therapy treatments prior to screening; 2) evidence of microangiopathic hemolysis (presence of schistocytes, serum lactate dehydrogenase (LDH) > upper limit of normal (ULN), or haptoglobin < LLN) and 3) serum creatinine > ULN.
o Chronic plasma therapy-responsive aHUS subjects (plasma therapy-sensitive) must require at least once-per-week plasma therapy for four weeks before first dose of OMS721 with serum creatinine >ULN.
• As of Amendment 10 of the Study Protocol, enrollment of TTP subjects
is closed. TTP defined as having all of the following:
o Platelet count < 150,000/μL
o Evidence of microangiopathic hemolysis (presence of schistocytes, serum LDH > ULN, or haptoglobin < LLN)
o ADAMTS13 activity ≤ 10% during the current episode of TTP or historically.
• Persistent HSCT-associated TMA defined as having all of the following at least two weeks following modification or discontinuation of
calcineurin inhibitor treatment or at least 30 days after the transplant:
o Platelet count < 150,000/μL
o Evidence of microangiopathic hemolysis (presence of schistocytes, serum LDH > ULN, or haptoglobin < LLN)
o Renal dysfunction (doubling of serum creatinine from pre-transplant).
5. No clinically apparent alternative explanation for thrombocytopenia and anemia.
6. If sexually active and of childbearing potential, must agree to practice a highly effective method of birth control until the end of the study, defined as one that results in a low failure rate (i.e., less than 1% per year) when used consistently and correctly, such as implants, injectables, combined oral contraceptives, some intrauterine devices, sexual abstinence or vasectomized partner. |
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E.4 | Principal exclusion criteria |
Subjects will be excluded from the study for any of the following reasons:
1. Had eculizumab therapy within three months prior to screening.
2. Have STEC-HUS.
3. Have a positive direct Coombs test.
4. Have an active systemic bacterial or fungal infection requiring antimicrobial therapy (prophylactic antimicrobial therapy administered as standard of care is allowed).
5. Baseline resting heart rate < 45 beats per minute or > 115 beats per minute.
6. Baseline QTcF > 470 milliseconds.
7. Have malignant hypertension (diastolic blood pressure [BP] > 120 mm Hg with bilateral hemorrhages or “cotton-wool” exudates on funduscopic examination).
8. Have a poor prognosis with a life expectancy of less than three months in the opinion of the investigator.
9. Are pregnant or lactating.
10. Have received treatment with an investigational drug or device within four weeks prior to screening.
11. Have abnormal liver function tests defined as ALT or AST > five times ULN.
12. Have a positive test for human immunodeficiency virus (HIV) antibodies.
13. Are an employee of Omeros, an investigator, a study staff member, or their immediate family member.
14. Have a known hypersensitivity to any constituent of the product.
15. Presence of any condition that the Investigator believes would put the subject at risk. |
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E.5 End points |
E.5.1 | Primary end point(s) |
• Safety as assessed by AEs, vital signs, ECGs and clinical laboratory tests
• Clinical activity as assessed by platelet count |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
from baseline across all evaluations/visits |
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E.5.2 | Secondary end point(s) |
• TMA clinical activity
o Serum LDH
o Serum haptoglobin
o Hemoglobin
o Serum creatinine
o TMA-related symptoms
o Need for plasma therapy (plasma exchange or plasma infusion)
o Need for dialysis
• PK parameters including maximum concentration (Cmax), time to maximum concentration (Tmax), elimination half-life (t½), area under time-concentration curve (AUC), clearance (CL), and volume of distribution (Vz)
• PD measure of inhibition of ex vivo lectin pathway activation
• Presence of ADA response |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
pre-dose, 5 min, 2 hours, 24 hours, 48 hours, 72 hours |
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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 | Yes |
E.6.13.1 | Other scope of the trial description |
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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 |
ascending-dose-escalation study |
|
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 | 16 |
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 |
Belgium |
Bulgaria |
Hong Kong |
Italy |
Lithuania |
Malaysia |
New Zealand |
Poland |
Singapore |
Taiwan |
Thailand |
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 | 5 |
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 | 5 |
E.8.9.2 | In all countries concerned by the trial months | 4 |
E.8.9.2 | In all countries concerned by the trial days | 0 |