Rapid Soft Tissue Approximation and Repair Using Laser-Activated Silk Nanosealants

Russell Urie, Chengchen Guo, Deepanjan Ghosh, Mitzi Thelakkaden, Valerie Wong, Jung Keun Lee, Jacquelyn Kilbourne, Jeffery Yarger, Kaushal Rege

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Tissue approximation and repair are conventionally performed with sutures and staples, but these means are inherently traumatic. Tissue approximation using laser-responsive nanomaterials can lead to rapid tissue sealing and repair, and is an attractive alternative to existing clinical methods. Here, the use of laser-activated nanosealants (LANS) with gold nanorods (GNRs) embedded in silk fibroin polypeptide matrices is demonstrated. The adaptability of LANS for sealing soft tissues is demonstrated using two different modalities: insoluble thin films for internal, intestinal tissue repair, and semisoluble pastes for external repair, shown by skin repair in live mice. Laser repaired intestinal tissue held over seven times more fluid pressure than sutured intestine and also prevented bacterial leakage. Skin incisions in mice closed using LANS' showed indication of increased mechanical strength and faster repair compared to suturing. Laser-activated silk-GNR nanosealants rapidly seal soft-tissue tears and show high promise for tissue approximation and repair in trauma and routine surgery.

Original languageEnglish (US)
Article number1802874
JournalAdvanced Functional Materials
Issue number42
StatePublished - Oct 17 2018


  • gold nanorods
  • sealant
  • tissue repair
  • tissue welding
  • wound healing

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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