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Implication of interleukin-4 in wound healing
V Salmon-Ehr1, L Ramont, G Godeau
1Laboratoire de Biochimie et Biologie Moléculaire, Faculté de Médecine, Reims, France.
Abstract:
Interleukin-4 (IL-4) is a pleiotropic cytokine that is able to activate connective tissue cells and stimulate the accumulation of extracellular matrix macromolecules. In this report, the expression of IL-4 in normal wound healing was studied by immunohistochemistry. The effects of exogenous IL-4 or IL-4 antisense oligonucleotides administration were also studied in mouse experimental wounds. IL-4 expression was detected in the lower dermis below the wound as early as Day 1 after wounding. IL-4 expression was maximal by Day 4, then decreased progressively, and completely disappeared by Day 21 after wounding. Topical administration of IL-4 on experimental wounds in mice significantly accelerated the rate of healing, whereas IL-4 antisense oligonucleotides significantly inhibited healing. These results demonstrate that IL-4 may be implicated in normal wound healing.
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