Delayed wound healing in the absence of intercellular adhesion molecule-1 or L-selectin expression

T Nagaoka, Y Kaburagi, Y Hamaguchi… - The American journal of …, 2000 - Elsevier
T Nagaoka, Y Kaburagi, Y Hamaguchi, M Hasegawa, K Takehara, DA Steeber, TF Tedder…
The American journal of pathology, 2000Elsevier
Inflammatory cells play a crucial role in wound healing, but the role of adhesion molecules
including L-selectin and intercellular adhesion molecule-1 (ICAM-1) is not known in this
process. We examined skin wound repair of excisional wounds in mice lacking L-selectin,
ICAM-1, or both. The loss of ICAM-1 inhibited wound healing, keratinocyte migration from
the edges of the wound toward the center, and granulation tissue formation. By contrast, L-
selectin deficiency alone did not affect any of these parameters. However, the loss of both L …
Inflammatory cells play a crucial role in wound healing, but the role of adhesion molecules including L-selectin and intercellular adhesion molecule-1 (ICAM-1) is not known in this process. We examined skin wound repair of excisional wounds in mice lacking L-selectin, ICAM-1, or both. The loss of ICAM-1 inhibited wound healing, keratinocyte migration from the edges of the wound toward the center, and granulation tissue formation. By contrast, L-selectin deficiency alone did not affect any of these parameters. However, the loss of both L-selectin and ICAM-1 resulted in inhibition of keratinocyte migration and granulation tissue formation beyond those caused by loss of ICAM-1 alone. Treatment of platelet-derived growth factor to the wounds normalized delayed wound healing in ICAM-1−/−mice, but not in L-selectin/ICAM-1−/− mice. Therefore, although ICAM-1 contributes to wound repair to a greater extent than L-selectin, a role for L-selectin was revealed in the absence of ICAM-1. The impaired wound repair was associated with reduced infiltration of neutrophils and macrophages in ICAM-1−/− and L-selectin/ICAM-1−/− mice. These results demonstrate a distinct role of ICAM-1 and L-selectin in wound healing and that the delayed wound healing in the absence of these molecules is likely because of decreased leukocyte accumulation into the wound site.
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