Angiogenin expression in burn blister fluid: Implications for its role in burn wound neovascularization

Deep partial thickness burn (DPTB) wound fluids have a greater propensity for establishing neovascularization than did superficial partial thickness burn (SPTB) wound fluids in our previous study. To investigate the factors responsible for this activity, cytokine array and enzyme‐linked immunosorben...

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Published in:Wound repair and regeneration 2012-09, Vol.20 (5), p.731-739
Main Authors: Pan, Shin-Chen, Wu, Li-Wha, Chen, Chung-Lin, Shieh, Shyh-Jou, Chiu, Haw-Yen
Format: Article
Language:English
Subjects:
Blister - metabolism
Burns - metabolism
Burns - physiopathology
Cell Proliferation
Cells, Cultured
Cicatrix - etiology
Cicatrix - metabolism
Endothelial Cells
Enzyme-Linked Immunosorbent Assay
Exudates and Transudates - metabolism
Humans
Immunohistochemistry
Neovascularization, Physiologic
Retrospective Studies
Ribonuclease, Pancreatic - adverse effects
Ribonuclease, Pancreatic - metabolism
Wound Healing
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Summary:Deep partial thickness burn (DPTB) wound fluids have a greater propensity for establishing neovascularization than did superficial partial thickness burn (SPTB) wound fluids in our previous study. To investigate the factors responsible for this activity, cytokine array and enzyme‐linked immunosorbent assay were used to perform an expression analysis of angiogenic factors in burn fluid. Although present in approximately equal amounts in both SPTB and DPTB blister fluids from burn patients, angiogenin does appear to be involved in the ability of DPTB blister fluid to promote neovascularization in vitro and in vivo. Angiogenin alone was sufficient to induce endothelial differentiation of circulating angiogenic cells (CAC) without vascular endothelial growth factor A involvement. In addition, angiogenin was positively associated with CAC differentiation in the burn blister fluid. Blocking the effect of angiogenin in burn blister fluids resulted in a significant reduction of endothelial cell proliferation, CAC differentiation, and new blood vessels formation in vivo. Moreover, immunohistochemistry revealed that high angiogenin expression colocalizes with high vascularity in human burn wounds at day 7, further supporting our hypothesis that angiogenin is involved in burn wound neovascularization.
ISSN:1067-1927
1524-475X
DOI:10.1111/j.1524-475X.2012.00819.x