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Cryopreserved Human Umbilical Cord (TTAX01) for Late Stage, Complex Non-healing Diabetic Foot Ulcers (AMBULATE DFU II)

Primary Purpose

Diabetic Foot Infection, Non-healing Wound, Non-healing Diabetic Foot Ulcer

Status
Recruiting
Phase
Phase 3
Locations
United States
Study Type
Interventional
Intervention
TTAX01
Standard care
Sponsored by
Tissue Tech Inc.
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Diabetic Foot Infection

Eligibility Criteria

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

Inclusion Criteria:

  • The subject has signed the informed consent form
  • The subject is male or female, at least 18 years of age inclusive at the date of Screening
  • The subject has confirmed diagnosis of Type I or Type II diabetes
  • The subject's index ulcer is located on the plantar surface, inter digital, heel, lateral or medial surface of the foot
  • The subject has an index ulcer with visible margins having an area ≤ 12.0 cm2 when measured by the electronic measuring device at Screening
  • The subject's index ulcer extends beyond the dermis, into subcutaneous tissue with evidence of exposed bone, tendon, muscle and/or joint capsule
  • The subject presents with history, signs or symptoms leading to a clinical suspicion of osteomyelitis in the opinion of the Investigator supported by positive Probe to Bone (PTB) and any of the following: radiographic (X-ray, Magnetic Resonance Imaging (MRI), or bone scan) or evidence of bone necrosis
  • The subject has an Ankle-Brachial Index ≥ 0.7 to ≤ 1.3 or TcPO2 ≥ 40 mmHg on the dorsum of the affected foot, or Great Toe Pressure ≥ 50 mmHg
  • The subject is under the care of a physician for the management of Diabetes Mellitus
  • The subject is willing to return for all mandatory visits as defined in the protocol
  • The subject is willing to follow the instructions of the trial Investigator

Exclusion Criteria:

  • The subject's index ulcer is primarily located on the dorsal surface of the foot
  • The subject's index ulcer can be addressed by primary closure through the completion of the initial or staged surgical procedure
  • The subject has a contralateral major amputation of the lower extremity
  • The subject has a glycated hemoglobin A1c (HbA1c) level of > 12% †
  • The subject has been on oral steroid use of > 7.5 mg daily for greater than seven (7) consecutive days in 30 days before Screening
  • The subject has been on parenteral corticosteroids, or any cytotoxic agents for seven consecutive days in the period of 30 days before Screening
  • The subject is currently taking the type 2 diabetes medicine canagliflozin (Invokana™, Invokamet™, Invokamet XR™)
  • The subject has malignancy or a history of cancer, other than non-melanoma skin cancer, in five years before Screening
  • The subject is pregnant
  • The subject is a nursing mother
  • The subject is a woman of child-bearing potential who is unwilling to avoid pregnancy or use an appropriate form of birth control (adequate birth control methods are defined as: topical, oral, implantable, or injectable contraceptives; spermicide in conjunction with a barrier such as a condom or diaphragm; intrauterine contraceptive device; or surgical sterilization of partner).
  • The subject is unable to sustain off-loading as defined by the protocol
  • The subject has an allergy to primary or secondary dressing materials used in this trial
  • The subject has an allergy to glycerol
  • The subject's index ulcer is over an acute Charcot deformity
  • The subject has had previous use of NEOX®, CLARIX®, or TTAX01 applied to the index ulcer
  • Per Investigator's discretion the subject is not appropriate for inclusion in the trial, e.g., undergoing surgical treatments listed in the protocol or the subject currently has sepsis, i.e., life-threatening organ dysfunction caused by a dysregulated host response to infection

Sites / Locations

  • LakeView Clinical Research
  • Banner University Medical Center TucsonRecruiting
  • NorthBay Healthcare
  • VA Northern California Health Care SystemRecruiting
  • CureCentricRecruiting
  • PIH HealthRecruiting
  • Midland Florida Clinical Research CenterRecruiting
  • Delray Physician Care Center
  • Gateway Clinical Trials, LLCRecruiting
  • Boston Medical Center
  • Beth Israel Deaconess Medical Center
  • Reno Orthopedic ClinicRecruiting
  • Curalta Foot and AnkleRecruiting
  • Northwell Health Comprehensive Wound Healing Center
  • Cutting Edge Research, LLCRecruiting
  • UPMC Center for Innovation in Restorative Medicine
  • University of Texas Southwestern Medical Center
  • Biolife Genetics Research
  • Bio-X-Cell Research

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Other

Arm Label

TTAX01

Control

Arm Description

TTAX01 plus standard of care

Standard care alone

Outcomes

Primary Outcome Measures

Complete wound healing
Time from baseline to initial observation of healing, where healing has been confirmed at two consecutive visits each two weeks apart.

Secondary Outcome Measures

Wound durability
Proportion of wounds that re-ulcerate
Limb preservation
proportion of minor and major amputations following the initial procedure
Patient-reported mobility
compare total score on PROMIS Health Organization Neuro-QoL 'lower extremity function'; scale from 1-5; higher scores indicate better self-reported health

Full Information

First Posted
June 25, 2020
Last Updated
September 12, 2023
Sponsor
Tissue Tech Inc.
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1. Study Identification

Unique Protocol Identification Number
NCT04450693
Brief Title
Cryopreserved Human Umbilical Cord (TTAX01) for Late Stage, Complex Non-healing Diabetic Foot Ulcers (AMBULATE DFU II)
Official Title
A Multicenter Phase 3 Confirmatory Trial of Biotherapy Using Cryopreserved Human Umbilical Cord (TTAX01) for Late Stage, Complex Non-healing Diabetic Foot Ulcers (AMBULATE DFU II)
Study Type
Interventional

2. Study Status

Record Verification Date
September 2023
Overall Recruitment Status
Recruiting
Study Start Date
November 20, 2020 (Actual)
Primary Completion Date
September 2024 (Anticipated)
Study Completion Date
September 2024 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Tissue Tech Inc.

4. Oversight

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

5. Study Description

Brief Summary
It is hypothesized that application at 4-week or greater intervals of the human placental umbilical cord tissue TTAX01 to the surface of a well debrided, complex diabetic foot ulcer (DFU) will, with concomitant management of infection, result in a higher rate of wounds showing complete healing within 25 weeks of initiating therapy, compared with standard care alone. This second confirmatory Phase 3 study examines a population of diabetic foot ulcer patients having adequate perfusion, with or without neuropathy, and a high suspicion of associated osteomyelitis in a complex, high grade wound.
Detailed Description
This trial is designed as a confirmatory study of the benefits and risks of TTAX01 when used in the treatment of Wagner Grades 3 and 4 DFU. Experience with the use of a cryopreserved umbilical cord (UC) product in treating such wounds, both prior to this IND and under this IND, has indicated that a frequency of application of no shorter than every 4 weeks is associated with better than expected outcomes. Although treatment cannot be blinded, a "standard care only" arm is included to control for the benefits of aggressive baseline debridement combined with aggressive (6 weeks systemic) antibiotics. Current treatment guidelines indicate that aggressive debridement plus 1-2 weeks of antibiotics, or, minor debridement plus 6 weeks of antibiotics, would produce equivalent outcomes, although the evidence is not strong. By utilizing both maximum debridement and maximum antimicrobial therapy, the standard care described in this protocol may result in healing rates somewhat superior to current standard practice. The design of this second confirmatory study is matched to the design of the Phase 2 efficacy study TTCRNE-1501, with the exception of extending the primary endpoint from a landmark analysis at 16 to a "wound survival" analysis through 26 weeks, utilizing a proportional risk analysis rather than a simple test of proportions. This design consideration is based on analysis of previous studies (see Background section), and a desire to fold data from every visit into the primary analysis, rather than generating an excessive number of secondary endpoints.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Diabetic Foot Infection, Non-healing Wound, Non-healing Diabetic Foot Ulcer

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 3
Interventional Study Model
Parallel Assignment
Masking
Outcomes Assessor
Masking Description
Due to the nature of the test article, the trial is open label, with no blinding of the site staff. The determination of wound closure will be made by the Investigator based on visual and tactile assessment of the wound. To reduce bias in the ascertainment of closure, one independent blinded reviewer will review the image obtained from a wound measurement device in each case where the Investigator makes a determination of closure. Discordant opinions will be adjudicated by a second independent blinded reviewer who will examine multiple additional images taken at various angles to the wound surface.
Allocation
Randomized
Enrollment
220 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
TTAX01
Arm Type
Experimental
Arm Description
TTAX01 plus standard of care
Arm Title
Control
Arm Type
Other
Arm Description
Standard care alone
Intervention Type
Biological
Intervention Name(s)
TTAX01
Intervention Description
TTAX01 is a cryopreserved human umbilical cord product derived from donated human placental tissue following healthy, live, caesarian section, full-term births after determination of donor eligibility and placenta suitability. TTAX01 is manufactured by TissueTech Inc. utilizing a proprietary CRYOTEK® process, which devitalizes the living cells but retains the natural structural and biological characteristics relevant to this tissue. TTAX01 is aseptically processed in compliance with current Good Tissue Practices (cGTP). TTAX01 will be manufactured in various sizes, stored in a medium of lactated Ringer's/glycerol (1:1).
Intervention Type
Other
Intervention Name(s)
Standard care
Intervention Description
Standard care is defined in this protocol to consist of the following: Debridement; Wound cleansing, using sterile saline, a non-ionic cleanser or a hypochlorous solution. Antiseptic agents including hydrogen peroxide, acetic acid, chlorhexidine, povidone/iodine, and cetrimide should not be used. Topical antimicrobials and silver dressings are also prohibited; Primary wound dressings including a non-adherent, standard foam pad with or without a hydrogel beneath the dressing, or and alginate dressing, as is appropriate to maintain a moist wound environment while managing exudate; A secondary retention bandage appropriate to the amount of wound exudate, so as to avoid maceration of the peri-wound skin; Off-loading device appropriate to the location of wound with full length boot or total contact cast (unless not appropriate where a substitute off-loading device can be made with sponsor approval); and, Appropriate use of systemic antibiotics.
Primary Outcome Measure Information:
Title
Complete wound healing
Description
Time from baseline to initial observation of healing, where healing has been confirmed at two consecutive visits each two weeks apart.
Time Frame
over 25 weeks
Secondary Outcome Measure Information:
Title
Wound durability
Description
Proportion of wounds that re-ulcerate
Time Frame
by Week 26
Title
Limb preservation
Description
proportion of minor and major amputations following the initial procedure
Time Frame
by Week 26
Title
Patient-reported mobility
Description
compare total score on PROMIS Health Organization Neuro-QoL 'lower extremity function'; scale from 1-5; higher scores indicate better self-reported health
Time Frame
Baseline to End of Study (approximately 26 weeks)

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: The subject has signed the informed consent form The subject is male or female, at least 18 years of age inclusive at the date of Screening The subject has confirmed diagnosis of Type I or Type II diabetes The subject's index ulcer is located on the plantar surface, inter digital, heel, lateral or medial surface of the foot The subject has an index ulcer with visible margins having an area ≤ 12.0 cm2 when measured by the electronic measuring device at Screening The subject's index ulcer extends beyond the dermis, into subcutaneous tissue with evidence of exposed bone, tendon, muscle and/or joint capsule The subject presents with history, signs or symptoms leading to a clinical suspicion of osteomyelitis in the opinion of the Investigator supported by positive Probe to Bone (PTB) and any of the following: radiographic (X-ray, Magnetic Resonance Imaging (MRI), or bone scan) or evidence of bone necrosis The subject has an Ankle-Brachial Index ≥ 0.7 to ≤ 1.3 or TcPO2 ≥ 40 mmHg on the dorsum of the affected foot, or Great Toe Pressure ≥ 50 mmHg The subject is under the care of a physician for the management of Diabetes Mellitus The subject is willing to return for all mandatory visits as defined in the protocol The subject is willing to follow the instructions of the trial Investigator Exclusion Criteria: The subject's index ulcer is primarily located on the dorsal surface of the foot The subject's index ulcer can be addressed by primary closure through the completion of the initial or staged surgical procedure The subject has a contralateral major amputation of the lower extremity The subject has a glycated hemoglobin A1c (HbA1c) level of > 12% † The subject has been on oral steroid use of > 7.5 mg daily for greater than seven (7) consecutive days in 30 days before Screening The subject has been on parenteral corticosteroids, or any cytotoxic agents for seven consecutive days in the period of 30 days before Screening The subject is currently taking the type 2 diabetes medicine canagliflozin (Invokana™, Invokamet™, Invokamet XR™) The subject has malignancy or a history of cancer, other than non-melanoma skin cancer, in five years before Screening The subject is pregnant The subject is a nursing mother The subject is a woman of child-bearing potential who is unwilling to avoid pregnancy or use an appropriate form of birth control (adequate birth control methods are defined as: topical, oral, implantable, or injectable contraceptives; spermicide in conjunction with a barrier such as a condom or diaphragm; intrauterine contraceptive device; or surgical sterilization of partner). The subject is unable to sustain off-loading as defined by the protocol The subject has an allergy to primary or secondary dressing materials used in this trial The subject has an allergy to glycerol The subject's index ulcer is over an acute Charcot deformity The subject has had previous use of NEOX®, CLARIX®, or TTAX01 applied to the index ulcer Per Investigator's discretion the subject is not appropriate for inclusion in the trial, e.g., undergoing surgical treatments listed in the protocol or the subject currently has sepsis, i.e., life-threatening organ dysfunction caused by a dysregulated host response to infection
Central Contact Person:
First Name & Middle Initial & Last Name or Official Title & Degree
Kathleen Ripp
Phone
786-753-2037
Email
kripp@biotissue.com
First Name & Middle Initial & Last Name or Official Title & Degree
Stanley Harris
Phone
678-722-9923
Email
sharris@biotissue.com
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Herbert Slade, MD
Organizational Affiliation
Chief Medical Officer
Official's Role
Study Chair
Facility Information:
Facility Name
LakeView Clinical Research
City
Guntersville
State/Province
Alabama
ZIP/Postal Code
35976
Country
United States
Individual Site Status
Terminated
Facility Name
Banner University Medical Center Tucson
City
Tucson
State/Province
Arizona
ZIP/Postal Code
85724
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Manny Ruiz
Email
mr476@arizona.edu
Facility Name
NorthBay Healthcare
City
Fairfield
State/Province
California
ZIP/Postal Code
94534
Country
United States
Individual Site Status
Withdrawn
Facility Name
VA Northern California Health Care System
City
Mather
State/Province
California
ZIP/Postal Code
95655
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Pallas Lim
Email
Pallas.Lim@va.gov
Facility Name
CureCentric
City
Palmdale
State/Province
California
ZIP/Postal Code
93551
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Brenda Velador
Email
bvelador@curecentric.com
Facility Name
PIH Health
City
Whittier
State/Province
California
ZIP/Postal Code
90606
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Kristine Bradbury
Email
Kristine.Bradbury@PIHHealth.org
Facility Name
Midland Florida Clinical Research Center
City
DeLand
State/Province
Florida
ZIP/Postal Code
32720
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Stacey-Ann Villaruel
Email
staceyann.mfcrc@gmail.com
Facility Name
Delray Physician Care Center
City
Delray Beach
State/Province
Florida
ZIP/Postal Code
33445
Country
United States
Individual Site Status
Terminated
Facility Name
Gateway Clinical Trials, LLC
City
O'Fallon
State/Province
Illinois
ZIP/Postal Code
62269
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Kristin Reinitz
Email
kristinreinitz@podiatry1st.com
Facility Name
Boston Medical Center
City
Boston
State/Province
Massachusetts
ZIP/Postal Code
02118
Country
United States
Individual Site Status
Withdrawn
Facility Name
Beth Israel Deaconess Medical Center
City
Boston
State/Province
Massachusetts
ZIP/Postal Code
02215
Country
United States
Individual Site Status
Terminated
Facility Name
Reno Orthopedic Clinic
City
Reno
State/Province
Nevada
ZIP/Postal Code
89503
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Janice Ta
Email
janicet@renoortho.com
Facility Name
Curalta Foot and Ankle
City
Westwood
State/Province
New Jersey
ZIP/Postal Code
07675
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Kevin Carbone
Email
kcarbone@curalta.com
Facility Name
Northwell Health Comprehensive Wound Healing Center
City
New Hyde Park
State/Province
New York
ZIP/Postal Code
11042
Country
United States
Individual Site Status
Withdrawn
Facility Name
Cutting Edge Research, LLC
City
Circleville
State/Province
Ohio
ZIP/Postal Code
43113
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Marie Liden
Email
researchbase969@gmail.com
Facility Name
UPMC Center for Innovation in Restorative Medicine
City
Pittsburgh
State/Province
Pennsylvania
ZIP/Postal Code
15261
Country
United States
Individual Site Status
Withdrawn
Facility Name
University of Texas Southwestern Medical Center
City
Dallas
State/Province
Texas
ZIP/Postal Code
75390
Country
United States
Individual Site Status
Active, not recruiting
Facility Name
Biolife Genetics Research
City
Houston
State/Province
Texas
ZIP/Postal Code
77095
Country
United States
Individual Site Status
Terminated
Facility Name
Bio-X-Cell Research
City
San Antonio
State/Province
Texas
ZIP/Postal Code
78211
Country
United States
Individual Site Status
Withdrawn

12. IPD Sharing Statement

Plan to Share IPD
No

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Cryopreserved Human Umbilical Cord (TTAX01) for Late Stage, Complex Non-healing Diabetic Foot Ulcers (AMBULATE DFU II)

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