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Innate Immun. 2015 Feb;21(2):140-50. doi: 10.1177/1753425913519350. Epub 2014 Jan 10.

Activated skin γδ T-cells regulate T-cell infiltration of the wound site after burn.

Author information

1
Department of Surgery, The University of Texas Health Science Center, San Antonio, TX, USA.
2
US Army Institute of Surgical Research, Fort Sam Houston, TX, USA.
3
Department of Surgery, The University of Texas Health Science Center, San Antonio, TX, USA US Army Institute of Surgical Research, Fort Sam Houston, TX, USA.
4
Department of Surgery, The University of Texas Health Science Center, San Antonio, TX, USA US Army Institute of Surgical Research, Fort Sam Houston, TX, USA schwacha@uthscsa.edu.

Abstract

Burn induces an immunopathological response involving multiple immune cell types that includes γδ T-cells. Nonetheless, the role of γδ T-cells at the wound site after burn is not clearly defined. Wild type and γδ T-cell receptor deficient (δ TCR(-/-)) mice were subjected to a major burn or sham procedure. At 1-7 d thereafter, skin samples were collected and T-cell populations analyzed. The majority of T-cells in the skin of sham mice were γδ T-cells. After burn, however, an increase in the total T-cells was observed at the wound site and these cells were predominantly αβ T-cells. Their influx was γδ T-cell dependent, as it was markedly reduced in injured δ TCR(-/-) mice. Burn wound γδ T-cells were activated with increased expression of TLRs and CD69. In contrast, the infiltrating αβ T-cells TLR and CD69 expressions were attenuated after burn. Thus, burn is associated with of γδ T-cell activation at the injury site, which initiates a massive infiltration of the wound with αβ T-cells that likely facilitate the transition from the inflammatory to the proliferative phase of healing.

KEYWORDS:

CD69; Injury; Toll-like receptors; inflammation; trauma

PMID:
24412847
DOI:
10.1177/1753425913519350
[Indexed for MEDLINE]

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