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A Prospective Randomized, Double-Blind, Placebo-Controlled Trial Comparing VitroGro® ECM to Placebo in Patients With Venous Leg Ulcers

This study is not yet open for participant recruitment. (see Contacts and Locations)
Verified July 2015 by Tissue Therapies Ltd.
Information provided by (Responsible Party):
Tissue Therapies Ltd. Identifier:
First received: November 5, 2013
Last updated: July 28, 2015
Last verified: July 2015
The objective of this study is to assess the efficacy and safety of VitroGro® combined with standard care in the treatment of Venous Leg Ulcers (VLUs) compared to Placebo with standard care over the course of the 8-week treatment phase.

Condition Intervention Phase
Venous Leg Ulcer
Drug: VitroGro® ECM
Drug: Dulbecco's Phosphate Buffered Saline
Phase 2
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Prospective, Multi-Center, Randomized, Double Blind, Placebo-Controlled Trial Comparing Vitrogro® ECM To Placebo As An Adjunct To Standard Care In Patients With Venous Leg Ulcers

Resource links provided by NLM:

Further study details as provided by Tissue Therapies Ltd.:

Primary Outcome Measures:
  • Time to complete wound closure within Treatment Phase [ Time Frame: 8 weeks ]

    The primary efficacy endpoint for the study is the time to complete wound closure, within the 8-week Treatment Phase, as assessed by the investigator. Complete wound closure is defined as 100% re-epithelialization with no presence of scab or drainage as assessed by the Investigator at PH0 and confirmed at PH2.

    The date of complete healing is defined as the date of the first assessment of complete closure (100% re-epithelialization with no presence of scab or drainage) when complete wound closure is confirmed at a study visit 14 days (±3 days) later. For the purposes of this study, the initial assessment of complete closure will occur at PH0 and complete closure will be confirmed at PH2.

Secondary Outcome Measures:
  • Percentage (%) change from baseline in ulcer surface area at the end of the Treatment Phase, as measured by SilhoutteStarTM [ Time Frame: 8 weeks ]
  • Incidence of complete healing within Treatment Phase, as determined by Investigator assessment [ Time Frame: 8 weeks ]
  • Incidence of complete healing at each visit within the 8-week Treatment Phase, as determined by Investigator assessment [ Time Frame: 8 weeks ]
  • Percentage (%) surface area reduction from baseline, at each visit within the 8-week Treatment Phase, as measured by SilhoutteStarTM [ Time Frame: 8 weeks ]
  • Time to first instance of no pain (i.e., pain score less than 5mm on VAS) [ Time Frame: 12 weeks ]
  • Time to first instance when the patient expectation was met as assessed by Patient Benefit Index [ Time Frame: 12 weeks ]
  • Incidence of ulcer recurrence, at the site of the ulcer, during the Post-Healing Phase [ Time Frame: Up to 4 weeks post-treatment ]
  • Change in Quality of Life metrics at study end. [ Time Frame: 12 weeks ]

Estimated Enrollment: 250
Study Start Date: January 2016
Estimated Study Completion Date: June 2018
Estimated Primary Completion Date: June 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: VitroGro®ECM
A topical application of synthetic extracellular matrix (ECM) protein formulation to the wound bed) plus Standard Care (moisture retentive dressing and multi-layer compression therapy).
Drug: VitroGro® ECM
Placebo Comparator: Dulbecco's Phosphate Buffered Saline
Dulbecco's Phosphate Buffered Saline plus Standard Care (moisture retentive dressing and multi-layer compression therapy).
Drug: Dulbecco's Phosphate Buffered Saline


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Study Ulcer: SU
  • Post-debridement: PD

Inclusion Criteria: Potential subjects are required to meet all of the following criteria for enrollment into the study and subsequent randomization.

  1. 18≤ years old.
  2. Ankle Brachial Pressure Index ≥0.80. (Calculations made using measurements from posterior tibial & dorsalis pedis arteries & both arms).
  3. Presence of a venous leg ulcer extending through the full thickness of the skin, but not down to muscle, tendon, or bone. The largest ulcer will be designated the SU and the only one included in the study. If other ulcerations are present on the same leg they must be more than 2 cm apart from the SU.
  4. Venous disease confirmed by Doppler ultrasound to demonstrate reflux of > 0.5 seconds in saphenous (great or small), calf perforators or the deep venous system. Subjects with prior venous surgery may be included if they still demonstrate significant reflux in a remaining venous segment and the SU continues to suffer poor healing because of venous hypertension.
  5. SU has been present 1 ≤ x ≤ 12 months prior to the initial screening visit, and is excluded if it has undergone 12 months of continuous high strength compression therapy over its duration.
  6. SU with a 2.5 ≤ x ≤ 20 cm2 at the T1 visit (PD).
  7. SU with a clean, granulating base free of adherent slough at the T1 visit (PD).
  8. In the case of a female patient of childbearing potential, willingness to use acceptable methods of contraception. A urine pregnancy test at the T1 visit must be administered, and must be negative for inclusion.
  9. Understanding of and willingness by the patient to participate in the clinical study and ability to comply with study procedures and study visit schedule.
  10. Reading, approval, and signature by the patient of the IRB/IEC ICF before screening procedures are undertaken.

Exclusion Criteria:Potential subjects meeting any of the following criteria will be excluded from enrollment and subsequent randomization:

  1. Ulcer(s) deemed by the Investigator to be caused by a medical condition other than venous insufficiency. These may include, but are not limited to: ulcerations due to fungal, malignant, diabetic, and/or arterial insufficiency causes.
  2. Ulcer exhibits clinical signs and symptoms of infection at S1 or T1. The infection should be treated & afterward the patient may be re-assessed for eligibility for study re-entry.
  3. Known allergy to any of the protocol-stipulated treatment procedures or non-tolerance of multi-layer compression therapy.
  4. Ulcer, in the opinion of the Investigator, is suspicious for cancer.
  5. A history of more than 2 weeks treatment with immunosuppressants (including systemic corticosteroids), cytotoxic chemotherapy, or application of topical steroids to the ulcer surface within 1 month prior to S1, or treatments with such medications during screening, or anticipated requirement of such medications during the course of the study.
  6. Treatment with any investigational drug(s) or therapeutic device(s) within 30 days preceding S1; or anticipated use of any of these therapies during the course of the study.
  7. Malignant disease not in remission for 5 or more years, other than basal cell or squamous cell carcinomas of the skin that have been medically or surgically treated without evidence of metastases.
  8. History of radiation at the SU site.
  9. As determined by medical history, presence of one or more medical conditions including renal, hepatic, hematologic, active auto-immune or immune diseases that, in the opinion of the Investigator, would make the subject an inappropriate candidate for this ulcer healing study.
  10. Known history of having AIDS or history of HIV infection.
  11. Previous participation in any VitroGro® ECM trial within the past 6 months.
  12. SU has been previously treated with tissue engineered materials or other scaffold materials within 30 days prior to S1.
  13. SU which in the opinion of the Investigator might require negative pressure wound therapy or hyperbaric oxygen during the course of the trial.
  14. Presence of any condition(s) that seriously compromise(s) the subject's ability to complete this study, or a known history of poor adherence with medical treatment.
  15. NYHA Class III and IV congestive heart failure (CHF), as defined by the following criteria:

    • Class III: Symptoms with moderate exertion
    • Class IV: Symptoms at rest
  16. Uncontrolled Diabetes Mellitus, as measured by an HbA1c >10%.
  17. Ulcer on the dorsum of the foot or with more than 50% of the ulcer below the malleolus is excluded.
  18. Pregnancy or breast-feeding.
  19. Increase or decrease by >30% in the SU surface area at the T1 visit (PD) as compared to the SU surface area as measured at the S1 visit (PD).
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01982318

Contact: Tina Motallebzadeh, PharmD, MS 301-956-2521
Contact: Shide Badri, MD 240-454-6825

Sponsors and Collaborators
Tissue Therapies Ltd.
  More Information

Additional Information:
Responsible Party: Tissue Therapies Ltd. Identifier: NCT01982318     History of Changes
Other Study ID Numbers: Vitro-US-1001
Study First Received: November 5, 2013
Last Updated: July 28, 2015

Keywords provided by Tissue Therapies Ltd.:
Venous Leg Ulcer
Leg Ulcer
Venous Hypertension
Venous Reflux
Deep Venous System
Chronic leg ulceration
Calf perforator

Additional relevant MeSH terms:
Leg Ulcer
Varicose Ulcer
Pathologic Processes
Skin Ulcer
Skin Diseases
Varicose Veins
Vascular Diseases
Cardiovascular Diseases processed this record on April 24, 2017