Gene Therapy to Improve Wound Healing in Patients With Diabetes

Tissue Repair Company

Status and phase

Completed

Phase 1

Conditions

Foot Wounds

Diabetes

Diabetic Foot Ulcers

Wounds and Injuries

Treatments

Genetic: GAM501

Study type

Interventional

Funder types

Industry

Identifiers

NCT00065663

R44AR046154 (U.S. NIH Grant/Contract)

NIAMS-093

Details and patient eligibility

About

Patients with diabetes may develop chronic wounds that respond poorly to treatment. Gene therapy with the platelet-derived growth factor-B gene has been shown to help with the healing of chronic wounds. This study will evaluate a new way to deliver the gene to the wound tissue.

Full description

Chronic wounds, such as diabetic ulcers, pressure ulcers, and venous stasis ulcers, cause significant morbidity in millions of patients each year in the United States. Individuals with long-standing diabetes develop both peripheral vascular disease and peripheral neuropathy. These patients may not feel pressure from shoes or objects which can damage their skin. Once a wound is formed, it may heal very slowly or not at all due to diabetic complications.

Platelet-derived growth factor-B (PDGF-B) has been approved for use in diabetic ulcers. However, delivery and maintenance of the drug at the wound site in sufficient quantities for a sufficient period of time is a major hurdle to widespread use.

Gene activated matrix (GAM) technology offers the opportunity to place a therapeutic gene contained within a structural matrix into a wound site. This study will evaluate the safety and potential clinical utility of topical applications of GAM501, a gene for PDGF-B contained within an E1-deleted adenoviral vector and formulated in a bovine type I collagen gel. This formulation allows for the migration of wound repair cells into the structural matrix, where they encounter the viral vector and subsequently produce the therapeutic protein within the local wound environment.

Participants in this study will receive up to four treatments with GAM501. Participants will be followed by multiple observations over a 6 to 7 month period.

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria

Adequately controlled diabetes mellitus (type I or II) as defined by HbA1c < 10.0%
Cutaneous, lower extremity, plantar medial or lateral surface ulcer between 1 and 10 cm2 post-debridement
Ulcer present for > 6 weeks prior to study entry
Ulcer free of all necrotic and infected soft tissue
Affected limb transcutaneous oxygen pressure (TcpO2) > 30 mmHg at screening or a palpable dorsal pedal or posterior tibial pulse
Inability to perceive 10 grams pressure using a Semmes-Weinstein 5.07 monofilament in the peri-ulcer area