title: Ciprofloxacin-Loaded Keratin Hydrogels PreventPseudomonas aeruginosaInfection and Support Healing in a Porcine Full-Thickness Excisional Wound.
abstract: Objective:Cutaneous wound infection can lead to impaired healing, multiple surgical procedures, and increased hospitalization time. We tested the effectiveness of keratin-based hydrogels (termed "keratose") loaded with ciprofloxacin to inhibit infection and support healing when topically administered to porcine excision wounds infected withPseudomonas aeruginosa.Approach:Using a porcine excisional wound model, 10 mm full-thickness wounds were inoculated with 106colony-forming units ofP. aeruginosaand treated on days 1 and 3 postinoculation with ciprofloxacin-loaded keratose hydrogels. Bacteria enumeration and wound healing were assessed on days 3, 7, and 11 postinjury.Results:Ciprofloxacin-loaded keratose hydrogels reduced the amount ofP. aeruginosain the wound bed by 99.9% compared with untreated wounds on days 3, 7, and 11 postinjury. Ciprofloxacin-loaded keratose hydrogels displayed decreased wound contraction and reepithelialization at day 7 postinjury. By day 11, wounds treated with ciprofloxacin-keratose hydrogels contained collagen-rich granulation tissue and myofibroblasts. Wounds treated with ciprofloxacin-loaded keratose hydrogels exhibited a transient increase in macrophages in the wound bed at day 7 postinjury that subsided by day 11.Innovation:Current therapies for wound infection include systemic antibiotics, which could lead to antibiotic resistance, and topical antimicrobial treatments, which require multiple applications and can delay healing. Here, we show that ciprofloxacin-loaded keratose hydrogels inhibit cutaneous wound infection without interfering with key aspects of the healing process including granulation tissue deposition and remodeling.Conclusions:Ciprofloxacin-loaded keratose hydrogels have the potential to serve as a point-of-injury antibiotic therapy that prevents infection and supports healing following cutaneous injury.
authors.affiliation: United States Army Institute of Surgical Research , Fort Sam Houston, Texas. ; KeraNetics , LLC, Winston-Salem, North Carolina.
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Roy
authors.affiliation: KeraNetics , LLC, Winston-Salem, North Carolina.
authors.forename: Seth
authors.initials: S
authors.lastname: Tomblyn
authors.affiliation: United States Army Institute of Surgical Research , Fort Sam Houston, Texas.
authors.forename: David M
authors.initials: DM
authors.lastname: Burmeister
authors.affiliation: United States Army Institute of Surgical Research , Fort Sam Houston, Texas.
authors.forename: Nicole L
authors.initials: NL
authors.lastname: Wrice
authors.affiliation: United States Army Institute of Surgical Research , Fort Sam Houston, Texas.
authors.forename: Sandra C
authors.initials: SC
authors.lastname: Becerra
authors.affiliation: KeraNetics , LLC, Winston-Salem, North Carolina.
authors.forename: Luke R
authors.initials: LR
authors.lastname: Burnett
authors.affiliation: Miami University , Oxford, Ohio.
authors.forename: Justin M
authors.initials: JM
authors.lastname: Saul
authors.affiliation: United States Army Institute of Surgical Research , Fort Sam Houston, Texas.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Christy