An ultrathin poly(L-lactic acid) nanosheet as a burn wound dressing for protection against bacterial infection

Hiromi Miyazaki, Manabu Kinoshita*, Akihiro Saito, Toshinori Fujie, Koki Kabata, Etsuko Hara, Satoshi Ono, Shinji Takeoka, Daizoh Saitoh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Burn wounds are highly susceptible to bacterial infection due to impairment of the skin's integrity. Therefore, prevention of bacterial colonization/infection in the wound is crucial for the management of burns, including partial-thickness burn injuries. Although partial-thickness burn injuries still retain the potential for reepithelialization, the complication of wound infection severely impairs the reepithelialization even in such superficial burn injuries. We recently developed a biocompatible nanosheet consisting of poly(L-lactic acid) (PLLA). The PLLA nanosheets have many useful and advantageous biological properties for their application as a wound dressing, such as sufficient flexibility, transparency, and adhesiveness. We herein investigated the suitability of the PLLA nanosheets as a wound dressing for partial-thickness burn wounds in mice. The PLLA nanosheets tightly adhered to the wound without any adhesive agents. Although wound infection with Pseudomonas aeruginosa in the controls significantly impaired reepithelialization of burn wounds, dressing with the PLLA nanosheet markedly protected against bacterial wound infection, thereby improving wound healing in the mice receiving partial-thickness burn injuries. The PLLA nanosheet also showed a potent barrier ability for protecting against bacterial penetration in vitro. The ultrathin PLLA nanosheet may be applied as a protective dressing to reduce environmental contamination of bacteria in a partial-thickness burn wound.

Original languageEnglish
Pages (from-to)573-579
Number of pages7
JournalWound Repair and Regeneration
Issue number4
Publication statusPublished - 2012 Jul

ASJC Scopus subject areas

  • Surgery
  • Dermatology


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