title: Thrombin peptide Chrysalin stimulates healing of diabetic foot ulcers in a placebo-controlled phase I/II study.
abstract: Thrombin and thrombin peptides play a role in initiating tissue repair. The potential safety and efficacy of TP508 (Chrysalin) treatment of diabetic foot ulcers was evaluated in a 60-subject, prospective, randomized, double-blind, placebo-controlled phase I/II clinical trial. Chrysalin in saline or saline alone was applied topically, twice weekly, to diabetic ulcers with standardized care and offloading. A dose-dependent effect was seen in the per-protocol population where 1 and 10 mug Chrysalin treatment resulted in 45 and 72% more subjects with complete healing than placebo treatment. Chrysalin treatment of foot ulcers more than doubled the incidence of complete healing (p<0.05), increased mean closure rate approximately 80% (p<0.05), and decreased the median time to 100% closure by approximately 40% (p<0.05). Chrysalin treatment of heel ulcers within this population resulted in mean closure rates 165% higher than placebos (p<0.02) and complete healing in 86% (6/7) of ulcers compared with 0% (0/5) of placebo ulcers (p<0.03). Local wound reactions and adverse events (AEs) were equal between groups with no reported drug-related changes in laboratory tests or serious AEs. These results indicate the potential safety and efficacy of Chrysalin for treatment of diabetic foot ulcers.
authors.affiliation: Department of Anesthesiology, University of Texas Health Science Center, Houston, Texas 77555-0645, USA.
authors.forename: Caroline
authors.initials: C
authors.lastname: Fife
authors.forename: Jon T
authors.initials: JT
authors.lastname: Mader
authors.forename: Jeffery
authors.initials: J
authors.lastname: Stone
authors.forename: Leon
authors.initials: L
authors.lastname: Brill
authors.forename: Kathleen
authors.initials: K
authors.lastname: Satterfield
authors.forename: Andrea
authors.initials: A
authors.lastname: Norfleet
authors.forename: Amber
authors.initials: A
authors.lastname: Zwernemann
authors.forename: James T
authors.initials: JT
authors.lastname: Ryaby
authors.forename: Darrell H
authors.initials: DH
authors.lastname: Carney
mesh_terms: D000328:Adult; D000368:Aged; D017719:Diabetic Foot / Q000188:drug therapy* / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000008:administration & dosage*; D010865:Pilot Projects; D011446:Prospective Studies; D013917:Thrombin / Q000008:administration & dosage*; D016896:Treatment Outcome; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D010446:Peptide Fragments; C412222:rusalatide acetate; D013917:Thrombin