An ear punch model for studying the effect of radiation on wound healing.

Journal Article

Purpose

Radiation and wound combined injury represents a major clinical challenge because of the synergistic interactions that lead to higher morbidity and mortality than either insult would produce singly. The purpose of this study was to develop a mouse ear punch model to study the physiological mechanisms underlying radiation effects on healing wounds.

Materials and methods

Surgical wounds were induced by a 2 mm surgical punch in the ear pinnae of MRL/MpJ mice. Photographs of the wounds were taken and the sizes of the ear punch wounds were quantified by image analysis. Local radiation to the ear was delivered by orthovoltage X-ray irradiator using a specially constructed jig that shields the other parts of body.

Results

Using this model, we demonstrated that local radiation to the wound area significantly delayed the healing of ear punch wounds in a dose-dependent fashion. The addition of sublethal whole body irradiation (7 Gy) further delayed the healing of ear punch wounds. These results were replicated in C57BL/6 mice; however, wound healing in MRL/MpJ mice was accelerated.

Conclusions

These data indicate that the mouse ear punch model is a valuable model to study radiation and wound combined injury.

Full Text

Duke Authors

Cited Authors

  • Deoliveira, D; Jiao, Y; Ross, JR; Corbin, K; Xiao, Q; Toncheva, G; Anderson-Evans, C; Yoshizumi, TT; Chen, BJ; Chao, NJ

Published Date

  • August 2011

Published In

Volume / Issue

  • 87 / 8

Start / End Page

  • 869 - 877

PubMed ID

  • 21480768

Pubmed Central ID

  • 21480768

Electronic International Standard Serial Number (EISSN)

  • 1362-3095

International Standard Serial Number (ISSN)

  • 0955-3002

Digital Object Identifier (DOI)

  • 10.3109/09553002.2011.568575

Language

  • eng