Abstract:
:The downstream consequences of inflammation in the adult mammalian heart are formation of a non-functional scar, pathological remodelling and heart failure. In zebrafish, hydrogen peroxide released from a wound is the initial instructive chemotactic cue for the infiltration of inflammatory cells, however, the identity of a subsequent resolution signal(s), to attenuate chronic inflammation, remains unknown. Here we reveal that thymosin β4-sulfoxide lies downstream of hydrogen peroxide in the wounded fish and triggers depletion of inflammatory macrophages at the injury site. This function is conserved in the mouse and observed after cardiac injury, where it promotes wound healing and reduced scarring. In human T-cell/CD14+ monocyte co-cultures, thymosin β4-sulfoxide inhibits interferon-γ, and increases monocyte dispersal and cell death, likely by stimulating superoxide production. Thus, thymosin β4-sulfoxide is a putative target for therapeutic modulation of the immune response, resolution of fibrosis and cardiac repair.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Evans MA,Smart N,Dubé KN,Bollini S,Clark JE,Evans HG,Taams LS,Richardson R,Lévesque M,Martin P,Mills K,Riegler J,Price AN,Lythgoe MF,Riley PRdoi
10.1038/ncomms3081subject
Has Abstractpub_date
2013-01-01 00:00:00pages
2081issn
2041-1723pii
ncomms3081journal_volume
4pub_type
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