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© Research
Publication : The British journal of dermatology

Attenuation of Flightless I, an actin-remodelling protein, improves burn injury repair via modulation of transforming growth factor (TGF)-beta1 and TGF-beta3.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The British journal of dermatology - 01 Aug 2009

Adams DH, Ruzehaji N, Strudwick XL, Greenwood JE, Campbell HD, Arkell R, Cowin AJ,

Link to Pubmed [PMID] – 19519830

Link to DOI – 10.1111/j.1365-2133.2009.09296.x

Br J Dermatol 2009 Aug; 161(2): 326-36

The pathophysiological mechanisms involved in burn injury repair are still not fully understood but include processes involving cellular proliferation, migration and adhesion. The actin cytoskeleton is intricately involved in these key wound repair processes. Flightless I (Flii), an actin-remodelling protein and transcriptional regulator, is an important regulator of wound healing.To investigate the function of Flii gene expression in burn injury repair.Partial-thickness scald wounds were created on Flii heterozygous (Flii(+/-)), wild-type (WT) and Flii transgenic (Flii(Tg/+)) mice. Burns were assessed using histology and immunohistochemistry, real-time quantitative polymerase chain reaction and biochemical analysis.Flii expression, while upregulated in burn injuries, was significantly lower in the wounds of Flii(+/-) vs. WT vs. Flii(Tg/+) mice and healing was improved in Flii(+/-) mice with their burns healing faster than WT and Flii(Tg/+). Pro-scarring transforming growth factor (TGF)-beta1 protein and gene expression were reduced in Flii(+/-) burns while antiscarring TGF-beta3 was significantly elevated. Anti-alpha-smooth muscle actin (alpha-SMA) was decreased in Flii(+/-) burns suggesting a decrease in contractile myofibroblasts in the developing scars. Although Flii is primarily a nuclear and cytoplasmic protein it is also released by wounded cells. Intradermal injection of Flii-neutralizing antibodies (FliAbs) to WT burn wounds significantly improved their healing, indicating a potential novel approach for treating burns. Decreased TGF-beta1 and elevated TGF-beta3 expression were observed in FliAb-treated burns, which may contribute to their observed improvement in healing.Strategies aimed at reducing Flii expression, for example using neutralizing antibodies, may lead to improved burn outcomes.