Phase 3, Open-label Clinical Trial of EB-101 for the Treatment of Recessive Dystrophic Epidermolysis Bullosa (RDEB)

VIITAL: A Phase 3 Study of EB-101 for the Treatment of Recessive Dystrophic Epidermolysis Bullosa (RDEB)

The purpose of this trial is to evaluate safety and efficacy of surgical application of EB-101 (autologous, gene-corrected keratinocyte sheets) as a treatment of recessive dystrophic epidermolysis bullosa (RDEB).

Study Overview

• Status: Completed
• Conditions: Epidermolysis Bullosa; Recessive Dystrophic Epidermolysis Bullosa
• Intervention / Treatment: Biological: EB-101

Detailed Description

Recessive dystrophic epidermolysis bullosa (RDEB) is an ultra-rare, severe inherited blistering skin disease caused by the absence of a protein known as type 7 collagen (C7). There is no approved treatment for RDEB. Only supportive care is currently possible.

This open-label, controlled study will evaluate the efficacy and safety of EB-101 for the treatment of large, chronic, RDEB wounds. The study intervention consists of one-time surgical application of gene-corrected keratinocyte sheets (EB-101) for the treatment of RDEB wound sites in up to approximately 10-15 participants. A single EB-101 sheet is able to provide healing to a wound area up to approximately 40cm2. Up to 6 (six) EB-101 sheets may be applied to each patient, depending on the area of existing wounds. The co-primary endpoints of the study are: 1) the proportion of RDEB wound sites with greater than or equal to 50% healing from baseline, comparing treated with untreated wound sites at Week 24 (Month 6) as determined by direct investigator assessment; and 2) pain reduction associated with wound dressing change assessed by the mean differences in scores of the Wong-Baker FACES scale between treated and untreated wounds at Week 24 (Month 6). Patient-reported outcomes and safety will also be collected throughout the study.

The primary analysis for efficacy will be assessed when all patients reach Week 24. Safety and efficacy assessments will be conducted at regular intervals and completed when last patient reaches Week 26 post-treatment.

Upon completion of the study period, patients will be monitored annually as per standard of care for up to 15 years.

• Study Type: Interventional
• Enrollment (Actual): 11
• Phase: Phase 3

Contacts and Locations

Study Locations

• United States
  • California
    • Redwood City, California, United States, 94063
      • Stanford University
  • Massachusetts
    • Worcester, Massachusetts, United States, 01605
      • University of Massachusetts Medical School

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 years and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Clinical diagnosis of RDEB;
• Age 6 years or older, willing and able to give consent/assent;
• If under the age of 18, guardian(s) is/are willing and able to give consent;
• Positive expression of the non-collagenous region 1 of the type 7 collagen protein (NC1+) in the skin;
• Two confirmed RDEB C7 mutations with recessive inheritance patterns (or confirmation that parents don't have any evidence of dominant disease);
• At least 40 cm2 areas of chronically wounded area on the trunk and/or extremities suitable for EB-101 application (open erosions);
• Able to undergo adequate anesthesia during EB-101 application;

• Must have at least two matched, eligible wound sites (one pair);

  • Wound sites must:

    • Have an area ≥20 cm2,
    • Present for ≥6 months, and
    • Stage 2 wound;
• Women of childbearing potential must use a reliable birth control method throughout the duration of the study and for 6 months post treatment;
• Negative pregnancy test;
• Must be on stable pain medication regimen at least 30 days prior to Screening

Exclusion Criteria:

• Medical instability limiting ability to travel to the study site;
• The presence of medical illness expected to complicate participation and/or compromise the safety of this technique, such as active infection with human immunodeficiency virus (HIV), hepatitis B or hepatitis C;
• Evidence of immune response to C7 by indirect immunofluorescence (IIF);
• Evidence of systemic infection;
• Current evidence or a history of squamous cell carcinoma (SCC) in the area that will undergo EB-101 application;
• Active drug or alcohol addiction;
• Hypersensitivity to vancomycin or amikacin;
• Receipt of chemical or biological study product for the specific treatment of RDEB in the past 3 months;
• Positive pregnancy test or breast-feeding;
• Clinically significant medical or laboratory abnormalities as determined by the Principal Investigator;
• Inability to properly follow protocol and protect keratinocyte sheet sites, as determined by the Principal Investigator;
• Grade 3 clinical event or laboratory abnormality at Day 0. Abnormalities such as esophageal strictures, anemia, low albumin, and pain/itch are expected in RDEB patients. These abnormalities will not exclude a participant; and
• Inability to culture participant's keratinocytes.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: EB-101; One-time surgical application of EB-101 on up to 6 chronic, RDEB wounds	Biological: EB-101; autologous RDEB keratinocytes isolated from skin biopsies and transduced with a recombinant retrovirus containing a full-length COL7A1 expression cassette for C7; Other Names: LZRSE-Col7A1 Engineered Autologous Epidermal Sheets [LEAES]

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Wound Healing	Proportion of RDEB wound sites with ≥50% healing from Baseline in treated versus untreated wounds	24 weeks post-treatment
Pain Reduction	Associated with wound dressing change assessed by the mean differences in scores of the Wong-Baker FACES scale between treated and untreated wounds	24 weeks post-treatment

Collaborators and Investigators

• Sponsor: Abeona Therapeutics, Inc
• Investigators: Principal Investigator: Jean Tang, MD, Stanford University

Study record dates

Study Major Dates

• Study Start (Actual): January 10, 2020
• Primary Completion (Actual): October 18, 2022
• Study Completion (Actual): October 18, 2022

Study Registration Dates

• First Submitted: January 10, 2020
• First Submitted That Met QC Criteria: January 10, 2020
• First Posted (Actual): January 13, 2020

Study Record Updates

• Last Update Posted (Actual): December 5, 2022
• Last Update Submitted That Met QC Criteria: December 2, 2022
• Last Verified: April 1, 2022

More Information

Terms related to this study

• Keywords: chronic wounds
• Additional Relevant MeSH Terms: Skin Diseases; Congenital Abnormalities; Genetic Diseases, Inborn; Connective Tissue Diseases; Skin Diseases, Genetic; Skin Diseases, Vesiculobullous; Skin Abnormalities; Collagen Diseases; Epidermolysis Bullosa; Epidermolysis Bullosa Dystrophica
• Other Study ID Numbers: EB-101-CL-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: Yes
• Studies a U.S. FDA-regulated device product: No