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Efficacy and Safety of BCX7353 to Prevent Angioedema Attacks in Subjects With Hereditary Angioedema (APeX-1)

Primary Purpose

Hereditary Angioedema (HAE)

Status
Completed
Phase
Phase 2
Locations
International
Study Type
Interventional
Intervention
BCX7353
Placebo
Sponsored by
BioCryst Pharmaceuticals
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Hereditary Angioedema (HAE)

Eligibility Criteria

18 Years - 70 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Key Inclusion Criteria:

  • A clinical diagnosis of HAE type I or II
  • Documented HAE attacks within a defined calendar period
  • Access to acute attack medications
  • Sexually active women of child-bearing potential and sexually active men must utilize effective contraception

Key Exclusion Criteria:

  • Women who are pregnant or breast-feeding
  • Any clinical condition or medical history that would interfere with the subject's safety or ability to participate in the study
  • Use of C1INH, androgens or tranexamic acid for prophylaxis of HAE attacks
  • History of or current alcohol or drug abuse
  • Infection with hepatitis B, hepatitis C or HIV
  • Participation in any other investigational drug study currently or within the last 30 days

Sites / Locations

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm 4

Arm 5

Arm Type

Experimental

Experimental

Experimental

Placebo Comparator

Experimental

Arm Label

Part 1: BCX7353 350 mg once daily

Parts 2 and 3: BCX7353 250 mg once daily

Parts 2 and 3: BCX7353 125 mg once daily

Parts 1, 2 and 3: Placebo

Part 3: BCX7353 62.5 mg once daily

Arm Description

BCX7353 capsules, 350 mg dose administered once per day for 28 days

BCX7353 capsules, 250 mg dose administered once per day for 28 days

BCX7353 capsules, 125 mg dose administered once per day for 28 days

Placebo capsules, administered once per day for 28 days

BCX7353 capsules, 62.5 mg dose administered once per day for 28 days

Outcomes

Primary Outcome Measures

Number of Confirmed HAE Attacks
Efficacy was evaluated by the number of acute angioedema attacks. To ensure that consistent, objective assessments were used in accepting subject-reported attack data, a panel of expert physicians in the treatment of HAE patients adjudicated all subject-reported attacks prior to their inclusion in primary efficacy analyses.
Proportion of Subjects Who Were HAE Attack-free During the Entire Dosing Period
Assessment of the proportion of subjects who had no HAE attacks during the entire dosing period

Secondary Outcome Measures

Number of Confirmed Abdominal HAE Attacks
A prespecified secondary endpoint analyzed confirmed attacks by anatomical location; abdominal HAE attacks included any abdominal symptoms (i.e. swelling in the stomach/gut, or any symptoms of nausea, vomiting, or abdominal pain)
Number of Confirmed Peripheral HAE Attacks
A prespecified secondary endpoint analyzed confirmed attacks by anatomical location; peripheral attacks included any with peripheral symptoms only (i.e. peripheral swelling or erythema marginatum).
HAE Attacks Requiring Treatment
A prespecified secondary endpoint analyzed the number of attacks requiring treatment with acute HAE medication (Berinert, Firazyr, Cinryze or Ruconest)
HAE Disease Activity - Modified Angioedema Activity Score
Activity of disease (i.e. disease severity) was assessed using a modified Angioedema Activity Score (AAS). The relevant endpoint for this study was the total modified AAS score, defined as the sum of the individual scores for 4 AAS domains (daily activities, appearance, physical discomfort, and overall severity) for all subject-reported attacks reported during the treatment period. Individual domain scores were based on answers to questions each of which had 4 possible responses scored 0-3 (0 - no impact; 1-3 - increasing levels of impact). The total modified AAS score per attack could range from 0 to 12; lower scores & higher scores represent lower & higher disease activities, respectively. However, the overall total modified AAS score reported for this study included the total scores for all subject-reported attacks, therefore the upper limit of the range was subject-specific. The statistical analysis of the total modified AAS scores for the treatment period is presented below.
Angioedema Quality of Life (AE-QoL)
Quality of Life (QoL) specific to hereditary angioedema (HAE) was assessed at baseline and Day 29 by a questionnaire (i.e. AE-QoL) consisting of 17 questions that spanned 4 domains (functioning, fatigue/mood, fear/shame, and nutrition). Each AE-QoL question had 5 answer options (scored 1-5), with lower and higher scores indicting less and more adverse impact, respectively. Per-subject scores for each domain were computed using the appropriate scoring algorithm applied to the question response scores for each domain. Per-subject total scores (including all 4 domains) were similarly computed using the question response scores for all 17 questions. The outputs from the scoring algorithm were normalized on a scale ranging from 0 (less adverse impact) to 100 (most adverse impact). The statistical analysis of the AE-QoL total score change from baseline to Day 29 is presented below.
DASS (Depression, Anxiety and Stress Scales)
The Depression, Anxiety & Stress Scale (DASS) was used to measure the negative emotional states of depression, anxiety & stress. This assessment was based on a DASS questionnaire administered at baseline, Day 14 & Day 29. The questionnaire consisted of 3 DASS scales (depression, anxiety & stress) containing 14 items each on a scale of 0 to 3 (0, did not apply to me at all; 1, applied to me to some degree/some of the time; 2, applied to me to a considerable degree/a good part of the time; 3, applied to me very much or most of the time). Per-subject scores for the depression, anxiety & stress scales were obtained by summing the scores for the appropriate questionnaire items for the respective category. Total DASS scores were then derived as the sum of the 3 individual scales & ranged from 0 to 126. Higher & lower total scores are associated with more & less adverse impact, respectively. The statistical analysis of the total DASS score change from baseline to Day 29 is presented below.

Full Information

First Posted
August 10, 2016
Last Updated
March 3, 2021
Sponsor
BioCryst Pharmaceuticals
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1. Study Identification

Unique Protocol Identification Number
NCT02870972
Brief Title
Efficacy and Safety of BCX7353 to Prevent Angioedema Attacks in Subjects With Hereditary Angioedema
Acronym
APeX-1
Official Title
A Randomized, Double-blind, Placebo-controlled, Dose-ranging, Parallel-group Study to Evaluate the Efficacy, Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of BCX7353 as a Preventative Treatment to Reduce the Frequency of Attacks in Subjects With Hereditary Angioedema
Study Type
Interventional

2. Study Status

Record Verification Date
March 2021
Overall Recruitment Status
Completed
Study Start Date
August 2016 (Actual)
Primary Completion Date
August 2017 (Actual)
Study Completion Date
August 2017 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
BioCryst Pharmaceuticals

4. Oversight

Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This 3-part study will evaluate the safety and efficacy of an oral treatment, BCX7353, in preventing angioedema attacks in subjects with hereditary angioedema (HAE). In Part 1 of the study, eligible subjects will be randomized to receive oral BCX7353 or placebo for 4 weeks. Assuming successful completion of Part 1, additional subjects will be randomized in Part 2 to one of 2 lower doses of BCX7353 or placebo. Part 3 will enroll additional subjects into one of three doses of BCX7353 or placebo. The study will compare the number of acute attacks in each treatment group, as well as a number of other clinical and pharmacologic outcomes, and the safety and tolerability of each dose of BCX7353 compared to placebo.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Hereditary Angioedema (HAE)

7. Study Design

Primary Purpose
Prevention
Study Phase
Phase 2
Interventional Study Model
Parallel Assignment
Masking
ParticipantInvestigator
Allocation
Randomized
Enrollment
75 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Part 1: BCX7353 350 mg once daily
Arm Type
Experimental
Arm Description
BCX7353 capsules, 350 mg dose administered once per day for 28 days
Arm Title
Parts 2 and 3: BCX7353 250 mg once daily
Arm Type
Experimental
Arm Description
BCX7353 capsules, 250 mg dose administered once per day for 28 days
Arm Title
Parts 2 and 3: BCX7353 125 mg once daily
Arm Type
Experimental
Arm Description
BCX7353 capsules, 125 mg dose administered once per day for 28 days
Arm Title
Parts 1, 2 and 3: Placebo
Arm Type
Placebo Comparator
Arm Description
Placebo capsules, administered once per day for 28 days
Arm Title
Part 3: BCX7353 62.5 mg once daily
Arm Type
Experimental
Arm Description
BCX7353 capsules, 62.5 mg dose administered once per day for 28 days
Intervention Type
Drug
Intervention Name(s)
BCX7353
Intervention Description
Plasma kallikrein inhibitor
Intervention Type
Drug
Intervention Name(s)
Placebo
Primary Outcome Measure Information:
Title
Number of Confirmed HAE Attacks
Description
Efficacy was evaluated by the number of acute angioedema attacks. To ensure that consistent, objective assessments were used in accepting subject-reported attack data, a panel of expert physicians in the treatment of HAE patients adjudicated all subject-reported attacks prior to their inclusion in primary efficacy analyses.
Time Frame
Investigators collected data from patient diaries from the first day of dosing through to Day 29 or last day of dosing +24 hrs (the effective dosing period).
Title
Proportion of Subjects Who Were HAE Attack-free During the Entire Dosing Period
Description
Assessment of the proportion of subjects who had no HAE attacks during the entire dosing period
Time Frame
Investigators collected data from patient diaries from the first day of dosing through to Day 29 or last day of dosing +24 hrs (the effective dosing period).
Secondary Outcome Measure Information:
Title
Number of Confirmed Abdominal HAE Attacks
Description
A prespecified secondary endpoint analyzed confirmed attacks by anatomical location; abdominal HAE attacks included any abdominal symptoms (i.e. swelling in the stomach/gut, or any symptoms of nausea, vomiting, or abdominal pain)
Time Frame
Investigators collected data from patient diaries from the first day of dosing through to Day 29 or last day of dosing +24 hrs (the effective dosing period).
Title
Number of Confirmed Peripheral HAE Attacks
Description
A prespecified secondary endpoint analyzed confirmed attacks by anatomical location; peripheral attacks included any with peripheral symptoms only (i.e. peripheral swelling or erythema marginatum).
Time Frame
Investigators collected data from patient diaries from the first day of dosing through to Day 29 or last day of dosing +24 hrs (the effective dosing period).
Title
HAE Attacks Requiring Treatment
Description
A prespecified secondary endpoint analyzed the number of attacks requiring treatment with acute HAE medication (Berinert, Firazyr, Cinryze or Ruconest)
Time Frame
Investigators collected data from patient diaries from the first day of dosing through to Day 29 or last day of dosing +24 hrs (the effective dosing period).
Title
HAE Disease Activity - Modified Angioedema Activity Score
Description
Activity of disease (i.e. disease severity) was assessed using a modified Angioedema Activity Score (AAS). The relevant endpoint for this study was the total modified AAS score, defined as the sum of the individual scores for 4 AAS domains (daily activities, appearance, physical discomfort, and overall severity) for all subject-reported attacks reported during the treatment period. Individual domain scores were based on answers to questions each of which had 4 possible responses scored 0-3 (0 - no impact; 1-3 - increasing levels of impact). The total modified AAS score per attack could range from 0 to 12; lower scores & higher scores represent lower & higher disease activities, respectively. However, the overall total modified AAS score reported for this study included the total scores for all subject-reported attacks, therefore the upper limit of the range was subject-specific. The statistical analysis of the total modified AAS scores for the treatment period is presented below.
Time Frame
28-day treatment period + 1 day
Title
Angioedema Quality of Life (AE-QoL)
Description
Quality of Life (QoL) specific to hereditary angioedema (HAE) was assessed at baseline and Day 29 by a questionnaire (i.e. AE-QoL) consisting of 17 questions that spanned 4 domains (functioning, fatigue/mood, fear/shame, and nutrition). Each AE-QoL question had 5 answer options (scored 1-5), with lower and higher scores indicting less and more adverse impact, respectively. Per-subject scores for each domain were computed using the appropriate scoring algorithm applied to the question response scores for each domain. Per-subject total scores (including all 4 domains) were similarly computed using the question response scores for all 17 questions. The outputs from the scoring algorithm were normalized on a scale ranging from 0 (less adverse impact) to 100 (most adverse impact). The statistical analysis of the AE-QoL total score change from baseline to Day 29 is presented below.
Time Frame
The subject-completed AE-QoL was administered at baseline (Day 1) and at Day 29
Title
DASS (Depression, Anxiety and Stress Scales)
Description
The Depression, Anxiety & Stress Scale (DASS) was used to measure the negative emotional states of depression, anxiety & stress. This assessment was based on a DASS questionnaire administered at baseline, Day 14 & Day 29. The questionnaire consisted of 3 DASS scales (depression, anxiety & stress) containing 14 items each on a scale of 0 to 3 (0, did not apply to me at all; 1, applied to me to some degree/some of the time; 2, applied to me to a considerable degree/a good part of the time; 3, applied to me very much or most of the time). Per-subject scores for the depression, anxiety & stress scales were obtained by summing the scores for the appropriate questionnaire items for the respective category. Total DASS scores were then derived as the sum of the 3 individual scales & ranged from 0 to 126. Higher & lower total scores are associated with more & less adverse impact, respectively. The statistical analysis of the total DASS score change from baseline to Day 29 is presented below.
Time Frame
The DASS was administered at baseline (Day 1), Day 14, and Day 29.

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
70 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Key Inclusion Criteria: A clinical diagnosis of HAE type I or II Documented HAE attacks within a defined calendar period Access to acute attack medications Sexually active women of child-bearing potential and sexually active men must utilize effective contraception Key Exclusion Criteria: Women who are pregnant or breast-feeding Any clinical condition or medical history that would interfere with the subject's safety or ability to participate in the study Use of C1INH, androgens or tranexamic acid for prophylaxis of HAE attacks History of or current alcohol or drug abuse Infection with hepatitis B, hepatitis C or HIV Participation in any other investigational drug study currently or within the last 30 days
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Emel Aygören-Pürsün, MD
Organizational Affiliation
University Hospital Frankfurt Goethe University
Official's Role
Principal Investigator
Facility Information:
City
Adelaide
Country
Australia
City
Campbelltown
Country
Australia
City
Graz
Country
Austria
City
Vienna
Country
Austria
City
Quebec City
Country
Canada
City
Toronto
Country
Canada
City
Odense
Country
Denmark
City
Berlin
Country
Germany
City
Frankfurt
Country
Germany
City
Ulm
Country
Germany
City
Budapest
Country
Hungary
City
Milano
Country
Italy
City
Padova
Country
Italy
City
Salerno
Country
Italy
City
Skopje
Country
North Macedonia
City
Barcelona
Country
Spain
City
Madrid
Country
Spain
City
Sevilla
Country
Spain
City
Zürich
Country
Switzerland
City
Brimingham
Country
United Kingdom
City
Bristol
Country
United Kingdom
City
London
Country
United Kingdom
City
Oxford
Country
United Kingdom
City
Southampton
Country
United Kingdom

12. IPD Sharing Statement

Plan to Share IPD
Yes
Citations:
PubMed Identifier
36326435
Citation
Beard N, Frese M, Smertina E, Mere P, Katelaris C, Mills K. Interventions for the long-term prevention of hereditary angioedema attacks. Cochrane Database Syst Rev. 2022 Nov 3;11(11):CD013403. doi: 10.1002/14651858.CD013403.pub2.
Results Reference
derived
PubMed Identifier
30044938
Citation
Aygoren-Pursun E, Bygum A, Grivcheva-Panovska V, Magerl M, Graff J, Steiner UC, Fain O, Huissoon A, Kinaciyan T, Farkas H, Lleonart R, Longhurst HJ, Rae W, Triggiani M, Aberer W, Cancian M, Zanichelli A, Smith WB, Baeza ML, Du-Thanh A, Gompels M, Gonzalez-Quevedo T, Greve J, Guilarte M, Katelaris C, Dobo S, Cornpropst M, Clemons D, Fang L, Collis P, Sheridan W, Maurer M, Cicardi M. Oral Plasma Kallikrein Inhibitor for Prophylaxis in Hereditary Angioedema. N Engl J Med. 2018 Jul 26;379(4):352-362. doi: 10.1056/NEJMoa1716995.
Results Reference
derived

Learn more about this trial

Efficacy and Safety of BCX7353 to Prevent Angioedema Attacks in Subjects With Hereditary Angioedema

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