In:
Circulation: Cardiovascular Interventions, Ovid Technologies (Wolters Kluwer Health), Vol. 16, No. 8 ( 2023-08)
Abstract:
New therapies are needed for patients with refractory angina. Encoberminogene rezmadenovec (XC001), a novel adenoviral-5 vector coding for all 3 major isoforms of VEGF (vascular endothelial growth factor), demonstrated enhanced local angiogenesis in preclinical models; however, the maximal tolerated dose and safety of direct epicardial administration remain unknown. METHODS: In the phase 1 portion of this multicenter, open-label, single-arm, dose-escalation study, patients with refractory angina received increasing doses of encoberminogene rezmadenovec (1×10 9 , 1×10 10 , 4×10 10 , and 1×10 11 viral particles) to evaluate its safety, tolerability, and preliminary efficacy. Patients had class II to IV angina on maximally tolerated medical therapy, demonstrable ischemia on stress testing, and were angina-limited on exercise treadmill testing. Patients underwent minithoracotomy with epicardial delivery of 15 0.1-mL injections of encoberminogene rezmadenovec. The primary outcome was safety via adverse event monitoring over 6 months. Efficacy assessments included difference from baseline to months 3, 6 (primary), and 12 in total exercise duration, myocardial perfusion deficit using positron emission tomography, angina class, angina frequency, and quality of life. RESULTS: From June 2, 2020 to June 25, 2021, 12 patients were enrolled into 4 dosing cohorts with 1×10 11 viral particle as the highest planned dose. Seventeen serious adverse events were reported in 7 patients; none were related to study drug. Six serious adverse events in 4 patients were related to the thoracotomy, 3 non–serious adverse events were possibly related to study drug. The 2 lowest doses did not demonstrate improvements in total exercise duration, myocardial perfusion deficit, or angina frequency; however, there appeared to be improvements in all parameters with the 2 higher doses. CONCLUSIONS: Epicardial delivery of encoberminogene rezmadenovec via minithoracotomy is feasible, and up to 1×10 11 viral particle appears well tolerated. A dose response was observed across 4 dosing cohorts in total exercise duration, myocardial perfusion deficit, and angina class. The highest dose (1×10 11 viral particle) was carried forward into phase 2. REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT04125732.
Type of Medium:
Online Resource
ISSN:
1941-7640
,
1941-7632
DOI:
10.1161/CIRCINTERVENTIONS.123.012997
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2023
detail.hit.zdb_id:
2450801-9
