A study in patients to assess the effectiveness, safety and patient tolerability of different doses of BCX7353 to treat acute HAE attacks compared to placebo

Phase 1

• Conditions: Hereditary Angioedema; MedDRA version: 20.0Level: PTClassification code 10019860Term: Hereditary angioedemaSystem Organ Class: 10010331 - Congenital, familial and genetic disorders; Therapeutic area: Diseases [C] - Blood and lymphatic diseases [C15]

• Registration Number: EUCTR2016-001424-55-DE
• Lead Sponsor: BioCryst Pharmaceuticals Inc.

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2017-03-27
• Study Completion: 2019-01-03
• Last Update Posted: 9 September 2024

Recruitment & Eligibility

• Status: ot Recruiting
• Sex: All
• Target Recruitment: 58

Inclusion Criteria

1. Able to provide written, informed consent
2. Males and non-pregnant, non-lactating females age 18 to 70 years
3. A clinical diagnosis of hereditary angioedema Type 1 or Type 2 defined having a C1INH functional level below 50% of normal and a C4 level
below the lower limit of normal reference range, as assessed at the Screening visit
4. Access to and ability to use standard of care acute attack treatment. Standard of care acute attack treatment is defined as a medication approved by the relevant competent authority for the treatment of attacks of HAE (e.g., icatibant, ecallantide, plasma-derived C1INH, recombinant C1INH).
5. Female participants must meet at least 1 of the following requirements:
a. Be a woman of childbearing potential (defined as a nonmenopausal female who has not had a hysterectomy, bilateral oophorectomy, or documented ovarian failure) who agrees to use an acceptable effective contraceptive method during the study and for a duration of 30 days after last dose of study drug.
Female subjects who report being postmenopausal for = 2 years and have a screening follicle stimulating hormone (FSH) = 40 mIU/mL must agree to use an acceptable effective contraceptive method during study and for 30 days after the last dose of study drug.
b. Be a woman of nonchildbearing potential (defined as postmenopausal for > 2 years or a screening FSH > 40 mIU/mL if postmenopausal = 2 years or have had a hysterectomy, bilateral oophorectomy, or documented ovarian failure).
c. Be a woman declaring herself as either sexually abstinent or exclusively having female sexual partners. Abstinence in this study is defined as true abstinence: when this is in line with the preferred and usual lifestyle of the subject.
6. Male participants must comply with the following requirements through to the end of the study:
a. Subjects with female partners of childbearing potential (defined as postmenopausal = 2 years or a nonmenopausal female who has not had a hysterectomy, bilateral oophorectomy, or documented ovarian failure) must agree to utilize an acceptable effective contraceptive method.
b. Male subjects who declare themselves as sexually abstinent or exclusively having male sexual partners are acceptable for the purposes of this study. Abstinence in this study is defined as true abstinence: when this is in line with the preferred and usual lifestyle of the subject.”
7. Any regularly administered concomitant medication recorded at the Screening visit and not stated as prohibited must be anticipated to be continued through the entire study and be of a stable dose and regimen for the duration of the entire study.
8. In the opinion of the Investigator, the subject is expected to adequately comply with all required study procedures for the duration of the study. To be dispensed study drug at baseline, the subject must demonstrate adequate compliance with all study procedures required from the Screening visit through randomization, including phoning the investigator and diary recording of at least one HAE attack during the screening period.
9. Must have an HAE attack rate of at least 1 unique attack per month for 3 months (up to 93 days) within the 4 months prior to the Screening visit.

Are the trial subjects under 18? no
Number of subjects for this age range:
F.1.2 Adults (18-64 years) yes
F.1.2.1 Number of subjects for this age range 55
F.1.3 Elderly (>=65 years) yes
F.1.3.1 Number of subjects for this age range 5

Exclusion Criteria

1. No HAE attack reported to the on-call Investigator (or designee) during the 35-day screening period.
2. Any clinically significant medical or psychiatric condition or medical history that, in the opinion of the Investigator or Sponsor, would interfere with the subject's ability to participate in the study or increase the risk of participation for that subject.
3. Dementia, altered mental status, or any psychiatric condition, or stay in an institution further to an official or court order that would prohibit the understanding or rendering of informed consent or participation in the study.
4. Clinically significant abnormal ECG at the Screening visit. This includes, but is not limited to, a QTcF > 470 msec for women, a QTcF > 450 msec for men, a PR > 220 msec (both sexes), or ventricular and/or atrial premature contractions that are more frequent than occasional, and/or as couplets or higher in grouping.
5. Any clinically significant history of angina, myocardial infarction, syncope, clinically significant cardiac arrhythmias, left ventricular hypertrophy, cardiomyopathy, or any other clinically significant cardiovascular abnormality such as poorly controlled hypertension.
6. Known family history of sudden cardiac death from causes other than HAE. Family history of sudden death from HAE is not exclusionary.
7. History of or current implanted defibrillator or pacemaker.
8. Any laboratory parameter at screening that, in the opinion of the Investigator, is clinically significant and relevant for this study. A calculated creatinine clearance of = 60 mL/min or AST or ALT value = 2 times the upper limit of the normal reference range value obtained during screening is exclusionary.
9. Suspected C1 INH resistance in the opinion of the Investigator and Sponsor.
10. History of alcohol or drug abuse within the previous year prior to the screening visit, or current evidence of substance dependence or abuse
(self-reported alcoholic intake > 3 drinks/day).
11. Positive serology for human immunodeficiency virus (HIV) or active infection with hepatitis B virus (HBV) or hepatitis C virus (HCV).
12. Pregnant, planning to become pregnant within 30 days of the study, or nursing.
13. Positive drugs of abuse screen (unless as used as medical treatment, e.g., with a prescription).
14. History of severe hypersensitivity to any medicinal product, which was associated with swelling, a severe rash requiring treatment/hospitalization, or anaphylaxis.
15. Hypersensitivity reaction to BCX7353.
16. Use of tranexamic acid, androgens or C1 INH for prophylaxis of HAE attacks within the 7 days prior to the Screening visit or initiation during the study. Use of a C1 INH therapy for treatment of attacks is not excluded at any time, nor is C1 INH for pre-procedure prophylaxis.
17. Use of concomitant medications that are metabolized by CYP2D6, CYP2C9, CYP2C19, and CYP3A4 and have a narrow therapeutic range,
within 7 days of the baseline visit or planned initiation during the study. For the purpose of this protocol, these include, but are not limited to the
following: warfarin, phenytoin, s-mephenytoin, thioridazine, alfentanil, astemizole, cisapride, cyclosporine, dihydroergotamine, ergotamine, fentanyl, pimozide, quinidine, sirolimus, tacrolimus, terfenadine and desogestrel.
18. Use of an angiotensin-converting enzyme inhibitor within 7 days of the baseline visit or planned initiation during the study.
19. Use of a medication that is clinically known

Study & Design

• Study Type: Interventional clinical trial of medicinal product
• Study Design: Not specified