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Extension Study to PTR-01-002 (A Study in Recessive Dystrophic Epidermolysis Bullosa (RDEB) Patients Previously Treated With PTR-01)

Primary Purpose

Recessive Dystrophic Epidermolysis Bullosa

Status
Completed
Phase
Phase 2
Locations
United States
Study Type
Interventional
Intervention
PTR-01
Sponsored by
Phoenix Tissue Repair, Inc.
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Recessive Dystrophic Epidermolysis Bullosa focused on measuring Dystrophic Epidermolysis Bullosa, Epidermolysis Bullosa, RDEB, EB

Eligibility Criteria

12 Years - undefined (Child, Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  1. Willing to provide informed consent form, or if 12 to <18 years of age, legal guardian has provided informed consent form and the minor has signed an assent form acknowledging that they understand and agree to study procedures.
  2. Has satisfactorily completed participation in PTR-01-002.
  3. Agrees to use contraception as follows:

    • For women of childbearing potential (WOCBP) agrees to use highly effective contraceptive (including abstinence) methods from Screening, through the study, and for at least 10 weeks after the last dose of study drug. Non-childbearing potential is defined as a female who meets either of the following criteria: age ≥50 years and no menses for at least 1 year or documented hysterectomy, bilateral tubal ligation, or bilateral oophorectomy.
    • For males, agrees to use a condom with any WOCBP sexual partner from Day 1 of study treatment, through the study, and at least 10 weeks after the last dose of study drug.
  4. Be willing and able to comply with this protocol.

Exclusion Criteria:

  1. Has known systemic hypersensitivity to any of the inactive ingredients in PTR-01.
  2. Has previously had an anaphylactic reaction to PTR-01.
  3. Is pregnant or nursing.
  4. Has received in the last six months any investigational gene therapy product or in the last three months any non-gene therapy investigational products (other than PTR-01).
  5. Is anticipated to receive new regimens of antibiotics or other anti-infectives during the trial.
  6. Has any other medical or personal condition that, in the opinion of the Investigator, may potentially compromise the safety or compliance of the

Sites / Locations

  • Stanford University
  • Columbia University Irving Medical Center

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

PTR-01

Arm Description

All patients will receive a PTR-01 dose of 3.0 mg/kg once weekly every week for a total of 4 doses, followed by a dose of 3.0 mg/kg once monthly for a total of 5 doses.

Outcomes

Primary Outcome Measures

Sustained wound healing
Change in a majority of target lesions of at least 2 levels using a 7-point (1-7) Global Impression of Change instrument (7 being the worst)
Incidence of treatment-emergent adverse events
Safety and tolerability, as assessed by treatment-emergent adverse events

Secondary Outcome Measures

Delivery of recombinant collagen 7 (PTR-01) to skin
Amount of recombinant collagen 7 (PTR-01) incorporation to skin as compared to normal human skin assessed by immunofluorescence using NC1 & NC2 antibody staining
Formation of anchoring fibrils
Formation of new anchoring fibrils as measured by electron microscopy
Change in wound surface area
Wound surface area of lesions as assessed by medical photography using the Canfield RUBI 3D imaging system
Change in skin integrity, as assessed by suction blister time
Change in skin integrity, as assessed by suction blister time
Change in skin integrity, as assessed by time to re-blistering
Change in skin integrity, as assessed by time to re-blistering
Change in itch severity, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) itch domains
Severity of itch, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) itch domains, maximum score of 5 (worst)
Change in the impact of itch on quality of life
Change in the impact of itch on quality of life, as assessed by the Pruritus-Specific Quality of Life Instrument (ItchyQoL), maximum score of 110 (worst)
Change in pain severity, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) pain domains
Change in pain severity, as assessed by Patient-Reported Outcome Measurement Information System (PROMIS) pain domains, maximum score of 5 (worst)
Change in pain severity, as assessed by the Instrument for Scoring Clinical Outcomes for Research of Epidermolysis Bullosa (iscorEB)
Change in pain severity, as assessed by the Instrument for Scoring Clinical, maximum score of 234 (worst)
Change of dysphagia, as assessed using the Brief Esophageal Dysphagia Questionnaire
Change of dysphagia, as assessed using the Brief Esophageal Dysphagia Questionnaire, maximum score is 40 (worst)
Stabilization of dysphagia, as assessed using the Brief Esophageal Dysphagia Instrument
Stabilization of dysphagia, as assessed using the Brief Esophageal Dysphagia Instrument, maximum score of 40 (worst)
Change in corneal symptoms
Change of corneal symptoms (eye symptoms), as assessed by the Epidermolysis Bullosa Eye Disease Index (EB-EDI), maximum score of 100 (worst)
Stabilization of corneal symptoms
Stabilization of corneal symptoms (eye symptoms), as assessed by the Epidermolysis Bullosa Eye Disease Index (EB-EDI), maximum score of 100 (worst)
Rate of change in nutritional markers (hemoglobin)
Change of nutritional markers, as assessed by hemoglobin
Rate of change in nutritional markers (hematocrit)
Change of nutritional markers, as assessed by hematocrit
Rate of change in nutritional markers (total protein/albumin)
Change of nutritional markers, as assessed by total protein/albumin
Rate of change in nutritional markers (Fe/TIBC)
Change of nutritional markers, as assessed by total Fe/TIBC
Rate of change in nutritional markers (C-reactive protein)
Change of nutritional markers, as assessed by total C-reactive protein
Change in Investigator Global Impressions of Change (IGIC)
Global impressions of change, as assessed through IGIC (1-7), 7 being worst
Change in Investigator Patient Impressions of Change (PGIC)
Global impressions of change, as assessed through PGIC (1-7), 7 being worst
Change in overall quality of life, as assessed by the Quality of Life in Epidermolysis Bullosa (QOLEB) questionnaire
Change in overall quality of life, as assessed by the Quality of Life in Epidermolysis Bullosa (QOLEB) questionnaire maximum score is 67 (worst)
Change in overall health
Change in overall disability, as assessed by the Health Assessment Questionnaire or Children's Health Assessment Questionnaire (HAQ/CHAQ) maximum score is 3 (worst)
Change in mental health
Change in mental health, as assessed by the Patient-Reported Outcomes Measurement Information System (PROMIS) mental health domains, maximum score is 5 (worst)
Change in social function
Change in social functioning, as assessed by the Patient-Reported Outcomes Measurement Information System (PROMIS) social function domains, maximum score is 4 (worst)
Change in amount of wound care
Change in amount of wound care, as assessed by patient interviews
Change in time for wound care
Change in time for wound care, as assessed by patient interviews
Change in cost of wound care
Change in cost of wound care, as assessed by patient interviews
Change in overall patient impression of quality of life
Change in overall anecdotal quality of life, as assessed by one-on-one patient interviews
Change in overall patient impression of disability
Change in overall anecdotal disability, as assessed by one-on-one patient interviews
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Cmax
Correlate ADA with Cmax
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Tmax
Correlate ADA with Tmax
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Area Under the Curve (AUC)
Correlate ADA with Area Under the Curve (AUC)
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter of clearance of PTR-01
Correlate ADA with clearance of PTR-01
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter of PTR-01 half-life
Correlate ADA with PTR-01 half-life

Full Information

First Posted
November 9, 2021
Last Updated
November 17, 2022
Sponsor
Phoenix Tissue Repair, Inc.
Collaborators
Phoenix Tissue Repair, a BridgeBio company
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1. Study Identification

Unique Protocol Identification Number
NCT05143190
Brief Title
Extension Study to PTR-01-002 (A Study in Recessive Dystrophic Epidermolysis Bullosa (RDEB) Patients Previously Treated With PTR-01)
Official Title
A Phase 2b Open-Label Study of PTR-01 in Recessive Dystrophic Epidermolysis Bullosa (RDEB) Patients Previously Treated With PTR-01 in Study PTR-01-002
Study Type
Interventional

2. Study Status

Record Verification Date
November 2022
Overall Recruitment Status
Completed
Study Start Date
December 2, 2021 (Actual)
Primary Completion Date
June 20, 2022 (Actual)
Study Completion Date
August 9, 2022 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Phoenix Tissue Repair, Inc.
Collaborators
Phoenix Tissue Repair, a BridgeBio company

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
A sub-set of patients who participated in PTR-01-002 will be enrolled in an open-label study, if they meet the study eligibility criteria.
Detailed Description
Protocol PTR-01-003 is a 4-part Phase 2, open-label study of PTR-01 in patients who satisfactorily completed study PTR-01-002 and meet current enrollment criteria. In Part 1, patients will be monitored monthly for up to 2 months with patient-reported and Investigator assessments. In Part 2, patients will receive a dose of 3.0 mg/kg every week for a total of 4 doses. This will be followed by Part 3 in which patients will receive a dose of 3.0 mg/kg monthly for a total of 5 additional doses. At the end of each dosing period, efficacy assessments will be performed. During Part 4, patients will be evaluated at Months 1 and 3 after completion of dosing to assess the durability of wound healing and other efficacy parameters. Safety will be assessed continuously throughout the study.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Recessive Dystrophic Epidermolysis Bullosa
Keywords
Dystrophic Epidermolysis Bullosa, Epidermolysis Bullosa, RDEB, EB

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 2
Interventional Study Model
Single Group Assignment
Model Description
Phase 2 open-label
Masking
None (Open Label)
Masking Description
Open-label
Allocation
N/A
Enrollment
2 (Actual)

8. Arms, Groups, and Interventions

Arm Title
PTR-01
Arm Type
Experimental
Arm Description
All patients will receive a PTR-01 dose of 3.0 mg/kg once weekly every week for a total of 4 doses, followed by a dose of 3.0 mg/kg once monthly for a total of 5 doses.
Intervention Type
Drug
Intervention Name(s)
PTR-01
Other Intervention Name(s)
Recombinant collagen 7 (rC7)
Intervention Description
Intravenous recombinant collagen 7
Primary Outcome Measure Information:
Title
Sustained wound healing
Description
Change in a majority of target lesions of at least 2 levels using a 7-point (1-7) Global Impression of Change instrument (7 being the worst)
Time Frame
Up to 246 days
Title
Incidence of treatment-emergent adverse events
Description
Safety and tolerability, as assessed by treatment-emergent adverse events
Time Frame
Up to 246 days
Secondary Outcome Measure Information:
Title
Delivery of recombinant collagen 7 (PTR-01) to skin
Description
Amount of recombinant collagen 7 (PTR-01) incorporation to skin as compared to normal human skin assessed by immunofluorescence using NC1 & NC2 antibody staining
Time Frame
Up to 246 days
Title
Formation of anchoring fibrils
Description
Formation of new anchoring fibrils as measured by electron microscopy
Time Frame
Up to 246 days
Title
Change in wound surface area
Description
Wound surface area of lesions as assessed by medical photography using the Canfield RUBI 3D imaging system
Time Frame
Up to 246 days
Title
Change in skin integrity, as assessed by suction blister time
Description
Change in skin integrity, as assessed by suction blister time
Time Frame
Up to 246 days
Title
Change in skin integrity, as assessed by time to re-blistering
Description
Change in skin integrity, as assessed by time to re-blistering
Time Frame
Up to 246 days
Title
Change in itch severity, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) itch domains
Description
Severity of itch, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) itch domains, maximum score of 5 (worst)
Time Frame
Up to 246 days
Title
Change in the impact of itch on quality of life
Description
Change in the impact of itch on quality of life, as assessed by the Pruritus-Specific Quality of Life Instrument (ItchyQoL), maximum score of 110 (worst)
Time Frame
Up to 246 days
Title
Change in pain severity, as assessed by modified Patient-Reported Outcome Measurement Information System (PROMIS) pain domains
Description
Change in pain severity, as assessed by Patient-Reported Outcome Measurement Information System (PROMIS) pain domains, maximum score of 5 (worst)
Time Frame
Up to 246 days
Title
Change in pain severity, as assessed by the Instrument for Scoring Clinical Outcomes for Research of Epidermolysis Bullosa (iscorEB)
Description
Change in pain severity, as assessed by the Instrument for Scoring Clinical, maximum score of 234 (worst)
Time Frame
Up to 246 days
Title
Change of dysphagia, as assessed using the Brief Esophageal Dysphagia Questionnaire
Description
Change of dysphagia, as assessed using the Brief Esophageal Dysphagia Questionnaire, maximum score is 40 (worst)
Time Frame
Up to 246 days
Title
Stabilization of dysphagia, as assessed using the Brief Esophageal Dysphagia Instrument
Description
Stabilization of dysphagia, as assessed using the Brief Esophageal Dysphagia Instrument, maximum score of 40 (worst)
Time Frame
Up to 246 days
Title
Change in corneal symptoms
Description
Change of corneal symptoms (eye symptoms), as assessed by the Epidermolysis Bullosa Eye Disease Index (EB-EDI), maximum score of 100 (worst)
Time Frame
Up to 246 days
Title
Stabilization of corneal symptoms
Description
Stabilization of corneal symptoms (eye symptoms), as assessed by the Epidermolysis Bullosa Eye Disease Index (EB-EDI), maximum score of 100 (worst)
Time Frame
Up to 246 days
Title
Rate of change in nutritional markers (hemoglobin)
Description
Change of nutritional markers, as assessed by hemoglobin
Time Frame
Up to 246 days
Title
Rate of change in nutritional markers (hematocrit)
Description
Change of nutritional markers, as assessed by hematocrit
Time Frame
Up to 246 days
Title
Rate of change in nutritional markers (total protein/albumin)
Description
Change of nutritional markers, as assessed by total protein/albumin
Time Frame
Up to 246 days
Title
Rate of change in nutritional markers (Fe/TIBC)
Description
Change of nutritional markers, as assessed by total Fe/TIBC
Time Frame
Up to 246 days
Title
Rate of change in nutritional markers (C-reactive protein)
Description
Change of nutritional markers, as assessed by total C-reactive protein
Time Frame
Up to 246 days
Title
Change in Investigator Global Impressions of Change (IGIC)
Description
Global impressions of change, as assessed through IGIC (1-7), 7 being worst
Time Frame
Up to 246 days
Title
Change in Investigator Patient Impressions of Change (PGIC)
Description
Global impressions of change, as assessed through PGIC (1-7), 7 being worst
Time Frame
Up to 246 days
Title
Change in overall quality of life, as assessed by the Quality of Life in Epidermolysis Bullosa (QOLEB) questionnaire
Description
Change in overall quality of life, as assessed by the Quality of Life in Epidermolysis Bullosa (QOLEB) questionnaire maximum score is 67 (worst)
Time Frame
Up to 246 days
Title
Change in overall health
Description
Change in overall disability, as assessed by the Health Assessment Questionnaire or Children's Health Assessment Questionnaire (HAQ/CHAQ) maximum score is 3 (worst)
Time Frame
Up to 246 days
Title
Change in mental health
Description
Change in mental health, as assessed by the Patient-Reported Outcomes Measurement Information System (PROMIS) mental health domains, maximum score is 5 (worst)
Time Frame
Up to 246 days
Title
Change in social function
Description
Change in social functioning, as assessed by the Patient-Reported Outcomes Measurement Information System (PROMIS) social function domains, maximum score is 4 (worst)
Time Frame
Up to 246 days
Title
Change in amount of wound care
Description
Change in amount of wound care, as assessed by patient interviews
Time Frame
Up to 246 days
Title
Change in time for wound care
Description
Change in time for wound care, as assessed by patient interviews
Time Frame
Up to 246 days
Title
Change in cost of wound care
Description
Change in cost of wound care, as assessed by patient interviews
Time Frame
Up to 246 days
Title
Change in overall patient impression of quality of life
Description
Change in overall anecdotal quality of life, as assessed by one-on-one patient interviews
Time Frame
Up to 246 days
Title
Change in overall patient impression of disability
Description
Change in overall anecdotal disability, as assessed by one-on-one patient interviews
Time Frame
Up to 246 days
Title
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Cmax
Description
Correlate ADA with Cmax
Time Frame
Up to 246 days
Title
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Tmax
Description
Correlate ADA with Tmax
Time Frame
Up to 246 days
Title
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter Area Under the Curve (AUC)
Description
Correlate ADA with Area Under the Curve (AUC)
Time Frame
Up to 246 days
Title
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter of clearance of PTR-01
Description
Correlate ADA with clearance of PTR-01
Time Frame
Up to 246 days
Title
Effect of anti-drug antibodies (ADA) on pharmacokinetics parameter of PTR-01 half-life
Description
Correlate ADA with PTR-01 half-life
Time Frame
Up to 246 days

10. Eligibility

Sex
All
Minimum Age & Unit of Time
12 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Willing to provide informed consent form, or if 12 to <18 years of age, legal guardian has provided informed consent form and the minor has signed an assent form acknowledging that they understand and agree to study procedures. Has satisfactorily completed participation in PTR-01-002. Agrees to use contraception as follows: For women of childbearing potential (WOCBP) agrees to use highly effective contraceptive (including abstinence) methods from Screening, through the study, and for at least 10 weeks after the last dose of study drug. Non-childbearing potential is defined as a female who meets either of the following criteria: age ≥50 years and no menses for at least 1 year or documented hysterectomy, bilateral tubal ligation, or bilateral oophorectomy. For males, agrees to use a condom with any WOCBP sexual partner from Day 1 of study treatment, through the study, and at least 10 weeks after the last dose of study drug. Be willing and able to comply with this protocol. Exclusion Criteria: Has known systemic hypersensitivity to any of the inactive ingredients in PTR-01. Has previously had an anaphylactic reaction to PTR-01. Is pregnant or nursing. Has received in the last six months any investigational gene therapy product or in the last three months any non-gene therapy investigational products (other than PTR-01). Is anticipated to receive new regimens of antibiotics or other anti-infectives during the trial. Has any other medical or personal condition that, in the opinion of the Investigator, may potentially compromise the safety or compliance of the
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Dan Rudin, MD
Organizational Affiliation
Phoenix Tissue Repair
Official's Role
Study Director
Facility Information:
Facility Name
Stanford University
City
Redwood City
State/Province
California
ZIP/Postal Code
94063
Country
United States
Facility Name
Columbia University Irving Medical Center
City
New York
State/Province
New York
ZIP/Postal Code
10032
Country
United States

12. IPD Sharing Statement

Plan to Share IPD
No

Learn more about this trial

Extension Study to PTR-01-002 (A Study in Recessive Dystrophic Epidermolysis Bullosa (RDEB) Patients Previously Treated With PTR-01)

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