Study to Evaluate the Efficacy and Safety of BCX7353 as an Oral Treatment for the Prevention of HAE Attacks in Japan (APeX-J)

January 12, 2023 updated by: BioCryst Pharmaceuticals

A Phase 3, Randomized, Double-blind, Placebo-controlled, Parallel-group Study to Evaluate the Efficacy and Safety of Two Dose Levels of BCX7353 as an Oral Treatment for the Prevention of Attacks in Subjects With Hereditary Angioedema

This is a phase 3, multi-center, randomized, double-blind, placebo-controlled trial to evaluate the efficacy and safety of oral BCX7353 in preventing acute angioedema attacks in patients with Type I and Type II HAE who live in Japan.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

19

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Japan
      • Chiba, Japan
        • Study Site
      • Gunma, Japan
        • Study Site
      • Hokkaido, Japan
        • Study Site
      • Nagoya, Japan
        • Study Site
      • Osaka, Japan
        • Study Site
      • Saga, Japan
        • Study Center
      • Saitama, Japan
        • Study Site
      • Shimane, Japan
        • Study Site
      • Shizuoka, Japan
        • Study Site
      • Tokyo, Japan
        • Study Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

12 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Key Inclusion Criteria:

  • A clinical diagnosis of hereditary angioedema (HAE) Type 1 or Type 2, defined as having a C1-INH functional level and a C4 level below the lower limit of the normal (LLN) reference range, as assessed during the Screening period.
  • Access to and ability to use one or more acute medications approved by the relevant competent authority for the treatment of acute attacks of HAE
  • Subjects must be medically appropriate for on-demand treatment as the sole medicinal management for their HAE during the study.
  • Subjects must have a specified number of expert-confirmed attacks during the run-in period of 56 days from the Screening visit.
  • Acceptable effective contraception
  • Written informed consent

Key Exclusion Criteria:

  • Pregnancy or breast-feeding
  • Any clinically significant medical condition or medical history that, in the opinion of the Investigator or Sponsor, would interfere with the subject's safety or ability to participate in the study
  • Any laboratory parameter abnormality that, in the opinion of the Investigator, is clinically significant and relevant for this study
  • Severe hypersensitivity to multiple medicinal products or severe hypersensitivity/ anaphylaxis with unclear etiology
  • Use of C1-INH within 14 days or use of androgens or tranexamic acid within 28 days prior to the Screening visit for prophylaxis of HAE attacks, or initiation of these drugs during the study
  • Current participation in any other investigational drug study or received another investigational drug within 30 days of the Screening visit
  • Prior enrollment in a BCX7353 study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: BCX7353 110mg once daily
BCX7353 capsules administered orally once daily
Drug: BCX7353 capsules
BCX7353 capsules administered orally once daily
Experimental: BCX7353 150mg once daily
BCX7353 capsules administered orally once daily
Drug: BCX7353 capsules
BCX7353 capsules administered orally once daily
Placebo Comparator: Placebo
Matching placebo oral capsules administered orally once daily
Drug: Placebo oral capsule
Matching placebo capsules administered orally once daily

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part 1: The Rate of Expert-confirmed HAE Attacks During Dosing in the Entire 24-week Treatment Period (Day 1 to Day 168)
Time Frame: 24 weeks
The angioedema event rate and the treatment comparisons between each berotralstat dose and placebo in the rate of expert-confirmed angioedema events during the entire dosing period was analyzed using a negative binomial regression model. The number of expert-confirmed angioedema events was included as the dependent variable, the treatment was included as a fixed effect, the stratification variable (baseline monthly angioedema event rate) and study (for the combined study analysis) were included as covariates, and the logarithm of duration on treatment was included as an offset variable. The estimated rate of angioedema events for each treatment group, the treatment differences expressed as the angioedema event rate ratio (berotralstat) over placebo rate ratio), and their associated 95% confidence intervals (CIs) were provided from the negative binomial regression model.
24 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part 1: Proportion of Days With Angioedema Symptoms Through 24 Weeks.
Time Frame: 24 weeks
Assessment of number and proportion of days subjects had angioedema symptoms from expert-confirmed angioedema events during Part 1.
24 weeks
Part 1: Rate of Expert-confirmed Angioedema Events During Dosing in the Effective Treatment Period
Time Frame: Day 8 through to 24 weeks
The rate of expert-confirmed angioedema events for the effective treatment period gives an analysis of the efficacy of active treatment after berotralstat had reached steady-state concentrations, given the effective half-life of 150 mg berotralstat in Study BCX7353-106 (Study 106) of 89 hours.
Day 8 through to 24 weeks
Part 1: Change From Baseline in Angioedema Quality of Life (AE- QoL) Questionnaire at Week 24 (Total Score)
Time Frame: Baseline and 24 weeks
Change in Quality of Life, on a 1-100 scale, where higher scores indicate more impairment and a decrease (change with a negative value) in AE-QoL questionnaire scores indicates an improvement in the subject's QoL. The minimum clinically important difference (MCID) for the AE-QoL questionnaire is -6 (total score). The AE-QoL is only validated for adults; however, data were collected on all adult and adolescent study subjects.
Baseline and 24 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

BioCryst Pharmaceuticals

Investigators

  • Principal Investigator: Isao Ohsawa, Saiyu Soka Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 28, 2019

Primary Completion (Actual)

November 15, 2019

Study Completion (Actual)

July 8, 2021

Study Registration Dates

First Submitted

March 11, 2019

First Submitted That Met QC Criteria

March 11, 2019

First Posted (Actual)

March 13, 2019

Study Record Updates

Last Update Posted (Estimate)

January 16, 2023

Last Update Submitted That Met QC Criteria

January 12, 2023

Last Verified

January 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • BCX7353-301

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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