A Phase I/II Study of KB103, a Topical HSV1-COL7, on DEB Patients

NCT ID: NCT03536143

Last Updated: 2023-01-31

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1/PHASE2
• Total Enrollment: 12 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-05-06
• Study Completion Date: 2019-11-01

Brief Summary

This study was conducted to assess the safety and efficacy of topical Beremagene Geperpavec (KB103, HSV1-COL7) on DEB patients.

Detailed Description

The primary objectives were the evaluation of safety, through incidence of adverse events associated with the administration of B-VEC as compared to placebo, as well as the demonstration of molecular correction of the disease by establishing the presence of functional COL7 expression and anchoring fibrils (AF) formation post administration of B-VEC. Additional primary objectives were to assess the proportion of wounds with complete wound closure (≥90% reduction from baseline wound surface area) at Week 8, 10, and 12, the duration of wound closure, and the time to wound closure of B-VEC treated wounds as compared with placebo treated wounds.

Conditions

Dystrophic Epidermolysis Bullosa

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Topical beremagene geperpavec

HSV1-COL7A1 vector (KB103)

Group Type: EXPERIMENTAL

Topical beremagene geperpavec

Intervention Type: BIOLOGICAL

Topical gel of non-integrating, replication-incompetent HSV-1 expressing the human collagen VII protein

Placebo

Placebo

Group Type: PLACEBO_COMPARATOR

Placebo gel

Intervention Type: BIOLOGICAL

Placebo gel

Interventions

Topical beremagene geperpavec

Topical gel of non-integrating, replication-incompetent HSV-1 expressing the human collagen VII protein

Intervention Type: BIOLOGICAL

Placebo gel

Placebo gel

Intervention Type: BIOLOGICAL

Other Intervention Names

HSV1-COL7A1; KB103

Eligibility Criteria

Inclusion Criteria

• Clinical diagnosis of the recessive form of dystrophic epidermolysis bullosa (RDEB).
• Age

1. Phase 1: 18 years old or older,

2. Phase 2a: 5 years old or older,

3. Phase 2b: 2 years old or older,

4. Phase 2c: 2 years old or older.

• Willing and able to give consent/assent
• Confirmation of RDEB diagnosis by genetic testing, IF, and IEM
• LH24 antibody negative (non-collagenous [NC] 2domain [NC2-]) and NC1 domain [NC1+]). (This criterion is applicable to the first 2 adults on the study (Phase 1). Subsequent subjects can be NC1+ or NC1-)
• Confirmed RDEB COL7A1 mutations in subject
• Wound that meets the wound size/surface area entry criteria:

1. Phase 1: Two wounds up to 10 cm2; 1 randomized to B-VEC and 1 randomized to placebo

2. Phase 2a and 2b: At least 3 wounds up to 20 cm2; 2 wounds randomized to B-VEC and 1 randomized to placebo

3. Phase 2c: At least 2 wounds up to 50 cm2; at least 1 randomized to B-VEC and 1 randomized to placebo

• Subjects, who are, in the opinion of the investigator, able to understand the study, cooperate with the study procedures, and are willing to return to the clinic for all the required follow-up visits.

Exclusion Criteria

• Medical instability limiting ability to travel to the investigative center
• 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 (as determined by hepatitis B surface antigen screening), or hepatitis C (as determined by detection of hepatitis C antibodies, or positive result of hepatitis C polymerase chain reaction [PCR] analysis)
• Serum antibodies to COL7 demonstrated on enzyme-linked immunosorbent assay (ELISA), indirect immunofluorescence microscopy, Western blot, or cell-mediated immunity to enzyme-lined ImmunoSpot® (subjects with negative results within 12 months of screening are eligible)
• Active infection in the area that will undergo administration
• Evidence of systemic infection
• Known allergy to any of the constituents of the product
• Current evidence or a history of squamous cell carcinoma in the area that will undergo treatment
• Active drug or alcohol addiction
• Hypersensitivity to local anesthesia (lidocaine/prilocaine cream)
• Receipt of chemical or biological study product for the specific treatment of RDEB in the past 3 months
• Specific wounds that have previously been administered investigational gene or cell therapy
• Subjects who have taken systemic antibiotics within 7 days
• Positive pregnancy test or breast-feeding
• Clinically significant abnormalities as determined by the investigator

• Minimum Eligible Age: 2 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Krystal Biotech, Inc.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Stanford University

Stanford, California, United States

Countries

United States

References

Gurevich I, Agarwal P, Zhang P, Dolorito JA, Oliver S, Liu H, Reitze N, Sarma N, Bagci IS, Sridhar K, Kakarla V, Yenamandra VK, O'Malley M, Prisco M, Tufa SF, Keene DR, South AP, Krishnan SM, Marinkovich MP. In vivo topical gene therapy for recessive dystrophic epidermolysis bullosa: a phase 1 and 2 trial. Nat Med. 2022 Apr;28(4):780-788. doi: 10.1038/s41591-022-01737-y. Epub 2022 Mar 28.

Reference Type: RESULT

PMID: 35347281 (View on PubMed)

Provided Documents

Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

KB103-001

Identifier Type: -

Identifier Source: org_study_id