Protective effect of MFG-E8 after cutaneous ischemia-reperfusion injury

J Invest Dermatol. 2015 Apr;135(4):1157-1165. doi: 10.1038/jid.2014.515. Epub 2014 Dec 10.

Abstract

We recently demonstrated that the secreted glycoprotein and integrin-ligand MFG-E8 promotes cutaneous wound healing by enhancing angiogenesis. Several studies have identified potential roles for MFG-E8 in regulation of ischemia-reperfusion (I/R) injury in the brain, kidney, and liver. Our objective was to assess the role of MFG-E8 in the formation of skin ulcers using a murine model of cutaneous I/R injury-cutaneous pressure ulcers. Cutaneous I/R was performed by trapping the dorsal skin between two magnetic plates for 12 hours, followed by plate removal. Expression of MFG-E8 increased in the dermis during ischemia, and then decreased after reperfusion. Administration of recombinant (r)MFG-E8 in I/R areas at the beginning of reperfusion significantly inhibited the formation of cutaneous pressure ulcers, and the number of CD31(+) vessel and NG2(+) pericytes in wounds were increased in I/R mice treated with rMFG-E8. The number of M1 macrophages and the amount of proinflammatory mediators monocyte chemotactic protein-1,induced nitric oxide synthase, IL-6, tumor necrosis factor-α, and IL-1β in the wound area were reduced by the administration of rMFG-E8. We conclude that MFG-E8 may inhibit the formation of pressure ulcers induced by cutaneous I/R injury by regulating angiogenesis and inflammation. Exogenous application of MFG-E8 might have therapeutic potential for cutaneous I/R injuries, including decubitus ulcers and Raynaud's phenomenon-induced digital ulcers.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, Surface / metabolism*
  • Apoptosis
  • Cell Line, Tumor
  • Chemokine CCL2 / metabolism
  • Endothelial Cells / cytology
  • Fibroblasts / metabolism
  • Human Umbilical Vein Endothelial Cells
  • Humans
  • Inflammation / metabolism
  • Ligands
  • Macrophages / metabolism
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Milk Proteins / metabolism*
  • NIH 3T3 Cells
  • Neovascularization, Pathologic
  • Nitric Oxide / metabolism
  • Platelet Endothelial Cell Adhesion Molecule-1 / metabolism
  • Pressure Ulcer / metabolism
  • RNA, Small Interfering / metabolism
  • Receptor, Platelet-Derived Growth Factor beta / metabolism
  • Recombinant Proteins / metabolism
  • Reperfusion Injury*
  • Skin / metabolism
  • Skin Diseases / metabolism*
  • Tissue Distribution
  • Tumor Necrosis Factor-alpha / metabolism
  • Wound Healing

Substances

  • Antigens, Surface
  • Ccl2 protein, mouse
  • Chemokine CCL2
  • Ligands
  • MFGE8 protein, human
  • Mfge8 protein, mouse
  • Milk Proteins
  • Platelet Endothelial Cell Adhesion Molecule-1
  • RNA, Small Interfering
  • Recombinant Proteins
  • Tumor Necrosis Factor-alpha
  • Nitric Oxide
  • Receptor, Platelet-Derived Growth Factor beta