Monday, February 27, 2017 8:21:36 AM
RESEARCH TRIANGLE PARK, N.C., Feb. 27, 2017 (GLOBE NEWSWIRE) -- BioCryst Pharmaceuticals, Inc. (BCRX) today announced results from an interim analysis of its Phase 2 APeX-1 trial in hereditary angioedema (HAE). APeX-1 is a dose ranging trial designed to evaluate the efficacy, safety, tolerability, pharmacokinetics and pharmacodynamics of orally administered once daily (QD) BCX7353 for 28 days, as a preventative treatment to reduce the frequency of attacks in HAE patients.
“The results of this interim analysis are extraordinarily encouraging,” said Dr. Emel Aygören-Pürsün, MD, principal investigator for the APeX-1 trial and Head of Interdisciplinary Competence Center for Hereditary Angioedema, and Specialist in Internal Medicine and Hemostaseology Department of Child and Adolescent Medicine, Goethe University Hospital Frankfurt. “Confirmation of the results would lead to a huge step forward in the treatment of hereditary angioedema, towards an effective, safe and easy to administer prophylaxis for the debilitating attacks connected with this condition.”
“We are extremely excited to have such a strong treatment effect in reducing HAE attacks with our once daily oral therapy,” said Jon Stonehouse, Chief Executive Officer & President of BioCryst. "What is even more encouraging is the dramatic benefit seen in the reduction of peripheral attacks and mixed peripheral and abdominal attacks. A once daily oral therapy with an 88% reduction in these attacks has the potential to make a huge difference in HAE patients’ lives.”
Twenty-eight subjects, randomized equally to receive BCX7353 350 mg QD or placebo for 28 days, were included in the interim analysis. The baseline attack rate was approximately 1/week, and average C1 inhibitor levels were less than 20% of the normal mean, indicating a severely affected patient population. Baseline characteristics were generally well balanced between the two groups with the exception of prior androgen use, which was more common in the BCX7353 group (11 of 14 compared with 6 of 14 on placebo). Compliance with study drug dosing was excellent (> 98%).
The pre-specified per-protocol (PP) interim analysis included data on 24 subjects with confirmed Type 1 or Type 2 HAE completing 28 days of treatment (11 treated with BCX7353 and 13 with placebo). The mean rate of independently-adjudicated angioedema attacks for the pre-defined effective dosing period (weeks 2 through 4) in BCX7353-treated subjects was 0.34/week compared to 0.92/week for placebo, a reduction of 0.57/week (63%), p = 0.006. In the intent-to-treat (ITT) population of 28 subjects, the rates of attacks for the effective dosing period for BCX7353 and placebo groups were 0.44/week and 0.91/week, a reduction of 0.47/week (52%), p = 0.035.
A pre-planned analysis of peripheral and abdominal attacks showed reductions of 88% and 24%, respectively, for BCX7353 compared with placebo (PP analysis, weeks 2 through 4). To understand this difference, patient diaries were reviewed and abdominal attacks (n = 9, BCX7353 and n = 14, placebo) were subdivided into two groups: attacks with abdominal symptoms only and attacks with a combination of abdominal and peripheral symptoms (mixed attacks). This post-hoc analysis showed that there were 2, 2 and 7 peripheral, mixed and abdominal-only attacks on BCX7353 compared with 22, 12 and 2 attacks, respectively, for placebo. Based on this distribution, it is likely that subjects recorded transient abdominal adverse events as HAE attack symptoms in their diary.
Steady state BCX7353 plasma levels in HAE subjects were similar to those in healthy subjects administered the same dose in a previously completed Phase 1 trial. Steady state trough drug levels (24 hours after dosing) were 11 – 32 times the 50% effective concentration (EC50) for plasma kallikrein inhibition.
Daily oral dosing with BCX7353 strongly inhibited plasma kallikrein throughout the 24 hour dosing interval; the degree of inhibition was similar to that seen with this dose in the healthy subject Phase 1 trial.
Oral BCX7353 350 mg once-daily for 28 days was generally safe and well tolerated in subjects with HAE. There were no serious adverse events (AEs) and no related severe AEs. Two subjects in the BCX7353 treatment group discontinued study drug before day 28, one due to an unrelated pre-existing condition, and one due to an adverse event of gastroenteritis associated with elevated liver enzymes. Treatment-emergent adverse events occurring in at least 2 subjects overall, enumerated by treatment group (BCX7353 [n=14] and placebo [n=14]), were: common cold (3, 4); diarrhea (4, 2); flatulence (2, 0); and fatigue (2, 0).
No clinically significant changes in hematology parameters, renal function tests, electrolytes, or urinalysis were observed. One subject treated with BCX7353, with pre-existing colitis, hepatic steatosis (fatty liver) and more than 20 years of prior androgen use, had an elevation of alanine aminotransferase (ALT) > 3 times the upper limit of normal at the end of treatment, which resolved.
The efficacy, safety and tolerability profile of BCX7353 observed in this interim analysis strongly supports its continued investigation as a prophylactic treatment for HAE. The steady state drug levels observed far exceeded the proposed therapeutic target range of 4 – 8 times the EC50, supporting evaluation of lower doses. Therefore, the APeX-1 trial has been amended to add a 62.5 mg QD dose level and to increase the number of subjects at the 125 mg QD and 250 mg QD dose levels, in order to more fully characterize dose response.
Everything I post is my opinion and only my opinion - if you read enough of my posts, you'll probably realize it's not an opinion that you'd like to take as advice or a recommendation. You've been warned.
Recent BCRX News
- ORLADEYO® (berotralstat) Approved in Mexico • GlobeNewswire Inc. • 05/13/2024 11:00:00 AM
- BioCryst Presents New Real-world Evidence Showing Significant Reductions in Healthcare Resource Utilization Among Patients with HAE Following Initiation of ORLADEYO® (berotralstat) • GlobeNewswire Inc. • 05/09/2024 11:00:00 AM
- Form 10-Q - Quarterly report [Sections 13 or 15(d)] • Edgar (US Regulatory) • 05/07/2024 08:02:30 PM
- BioCryst to Present at Upcoming Investor Conferences • GlobeNewswire Inc. • 05/07/2024 11:00:22 AM
- Form 8-K - Current report • Edgar (US Regulatory) • 05/06/2024 11:03:00 AM
- BioCryst Reports First Quarter 2024 Financial Results and Provides Business Update • GlobeNewswire Inc. • 05/06/2024 11:00:00 AM
- BioCryst Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) • GlobeNewswire Inc. • 05/03/2024 11:00:07 AM
- BioCryst to Report First Quarter 2024 Financial Results on May 6 • GlobeNewswire Inc. • 04/22/2024 11:00:50 AM
- BioCryst Announces Approval of ORLADEYO® (berotralstat) by the Brazilian Health Regulatory Agency • GlobeNewswire Inc. • 04/17/2024 08:30:39 AM
- BioCryst Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) • GlobeNewswire Inc. • 04/03/2024 11:00:23 AM
- BioCryst to Present at Upcoming Investor Conferences • GlobeNewswire Inc. • 03/25/2024 08:01:00 PM
- BioCryst Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) • GlobeNewswire Inc. • 03/05/2024 12:01:47 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 03/04/2024 10:25:11 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 03/04/2024 09:32:01 PM
- Form S-3ASR - Automatic shelf registration statement of securities of well-known seasoned issuers • Edgar (US Regulatory) • 02/27/2024 10:05:49 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 02/26/2024 12:05:56 PM
- BioCryst Reports Fourth Quarter and Full Year 2023 Financial Results and Upcoming Key Milestones • GlobeNewswire Inc. • 02/26/2024 12:00:05 PM
- U.S. Index Futures Dip Amid Inflation Data Anticipation, Oil and Iron Ore Prices Retreat • IH Market News • 02/26/2024 10:57:28 AM
- BioCryst Presents New Real-world Data Showing Rapid, Substantial and Sustained HAE Attack Rate Reductions After Beginning ORLADEYO® (berotralstat) Treatment • GlobeNewswire Inc. • 02/23/2024 12:00:00 PM
- BioCryst to Present at Upcoming Investor Conferences • GlobeNewswire Inc. • 02/21/2024 09:01:58 PM
- BioCryst Launches ORLADEYO® (berotralstat) in Italy • GlobeNewswire Inc. • 02/19/2024 12:54:52 PM
- Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] • Edgar (US Regulatory) • 02/14/2024 09:21:51 PM
- Form SC 13G - Statement of acquisition of beneficial ownership by individuals • Edgar (US Regulatory) • 02/14/2024 02:02:50 PM
- BioCryst to Report Fourth Quarter 2023 Financial Results on February 26 • GlobeNewswire Inc. • 02/12/2024 12:00:53 PM
- BioCryst to Present New ORLADEYO® (berotralstat) Real-world Data at 2024 American Academy of Allergy, Asthma & Immunology Annual Meeting • GlobeNewswire Inc. • 02/05/2024 12:00:00 PM
Avant Technologies Equipping AI-Managed Data Center with High Performance Computing Systems • AVAI • May 10, 2024 8:00 AM
VAYK Discloses Strategic Conversation on Potential Acquisition of $4 Million Home Service Business • VAYK • May 9, 2024 9:00 AM
Bantec's Howco Awarded $4.19 Million Dollar U.S. Department of Defense Contract • BANT • May 8, 2024 10:00 AM
Element79 Gold Corp Successfully Closes Maverick Springs Option Agreement • ELEM • May 8, 2024 9:05 AM
Kona Gold Beverages, Inc. Achieves April Revenues Exceeding $586,000 • KGKG • May 8, 2024 8:30 AM
Epazz plans to spin off Galaxy Batteries Inc. • EPAZ • May 8, 2024 7:05 AM