Reversal of impaired wound repair in iNOS-deficient mice by topical adenoviral-mediated iNOS gene transfer

Kokushi Yamasaki, Howard D.J. Edington, Carol McClosky, Edith Tzeng, Alena Lizonova, Imre Kovesdi, David L. Steed, Timothy R. Billiar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

385 Scopus citations


Most evidence indicates that nitric oxide plays a role in normal wound repair;, however, involvement of inducible nitric oxide synthase (iNOS) has not been established. Experiments were carried out to determine the requirement for iNOS in closing excisional wounds. Wound closure was delayed by 31% in iNOS knockout mice compared with wild-type animals. An identical delay in wound closure was observed in wild-type mice given a continuous infusion of the partially selective iNOS inhibitor N6-(iminoethyl)-L- lysine. Delayed wound healing in iNOS-deficient mice was completely reversed by a single application of an adenoviral vector containing human iNOS cDNA (AdiNOS) at the time of wounding. Reverse transcription PCR identified iNOS mRNA expression in wild-type mice peaking 4-6 d after wounding, and confirmed expression of human iNOS in the adenoviral vector containing human iNOS cDNA- treated animals. These results establish the key role of iNOS in wound closure, and suggest a gene therapy strategy to improve wound healing in iNOS-deficient states such as diabetes, and during steroid treatment.

Original languageEnglish
Pages (from-to)967-971
Number of pages5
JournalJournal of Clinical Investigation
Issue number5
StatePublished - 1 Mar 1998
Externally publishedYes


  • Gene therapy
  • Nitric oxide
  • Wound repair
  • iNOS
  • iNOS knockout


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