NYMC Faculty Publications
IL-1 Plays A Critical Role in Oral, but Not Dermal, Wound Healing
Author Type(s)
Faculty
Additional Author Affiliation
Touro College of Dental Medicine at NYMC
Journal Title
Journal of Immunology
First Page
5316
Last Page
5320
Document Type
Article
Publication Date
11-1-2001
Department
Pharmacology
Abstract
Wound healing is a well-orchestrated complex process leading to the repair of injured tissues. After injury, proinflammatory cytokines act as important modulators of the inflammatory process. IL-1 expression has been regarded as necessary for healing; however, its effects have also been implicated in delayed wound repair. Currently, there is no consensus or direct evidence that IL-1 activity plays a central role in the healing process. The present investigation was undertaken to define the role of IL-1R signaling in the healing outcome of an excisional wound in the palate or scalp of mice that had targeted deletions of the IL-1R type 1 (IL-1R1(-/-)) compared with matched wild-type mice. Histomorphometric analysis was undertaken to assess the degree of healing and the recruitment of polymorphonuclear and mononuclear phagocytes. After 14 days, wild-type mice exhibited complete closure of intraoral wounds, while IL-1R1(-/-) animals had only partial closure (50%). In the IL-1R1(-/-) mice, healing tissues exhibited a persistent inflammatory cell infiltrate, which did not occur in wild-type animals. Treatment with antibiotics significantly diminished the persistent inflammatory infiltrate and improved healing in the experimental animals. In contrast to oral wounds, the rate of healing and recruitment of polymorphonuclear cells in scalp wounds was similar in IL-1R1(-/-) and wild-type mice. The present data underscore the importance of IL-1 in wound healing in a challenging environment and identify its principal role in facilitating the healing process by protecting an open wound from bacterial insult. In a less challenging environment, the production of new connective tissue and its coverage by migrating epithelium are minimally affected by the absence of IL-1 activity.
Recommended Citation
Graves, D., Nooh, N., Gillen, T., Davey, M., Patel, S., Cottrell, D., & Amar, S. (2001). IL-1 Plays A Critical Role in Oral, but Not Dermal, Wound Healing. Journal of Immunology, 167 (9), 5316-5320. Retrieved from https://touroscholar.touro.edu/nymc_fac_pubs/5660
