title: Novel 14S,21-dihydroxy-docosahexaenoic acid rescues wound healing and associated angiogenesis impaired by acute ethanol intoxication/exposure.
abstract: Acute ethanol intoxication and exposure (AE) has been known to impair wound healing and associated angiogenesis. Here, we found that AE diminished the formation of novel reparative lipid mediator 14S,21-dihydroxy-docosa-4Z,7Z,10Z,12E,16Z,19Z-hexaenoic acid (14S,21-diHDHA) and its biosynthetic intermediate 14S-hydroxy-DHA (14S-HDHA) from docosahexaenoic acid (DHA) in murine wounds. However, AE did not reduce the formation of DHA and the intermediate 21-HDHA. These results indicate that in the biosynthetic pathways of 14S,21-diHDHA in wounds, AE suppresses the 14S-hydroxy-generating activity of 12-lipoxygenase-like (LOX-like), but does not suppress the 21-hydroxy-generating activity of cytochrome P450 and DHA-generating activities. The AE-suppression of 12-LOX-like activity was further confirmed by the diminished formation of 12-hydroxy-eicosatetraenoic acid in wounds under AE. Supplementing 14S,21-diHDHA to wounds rescued the AE-impaired healing and vascularization. 14S,21-diHDHA restored AE-impaired processes of angiogenesis in vitro: endothelial cell migration, tubulogenesis, and phosphorylation of p38 mitogen-activated protein kinase (MAPK). Taken together, the suppression of 14S,21-diHDHA formation is responsible, at least partially, for the AE-impairment of cutaneous wound healing and angiogenesis. Supplementing 14S,21-diHDHA to compensate its deficit in AE-impaired wounds rescues the healing and angiogenesis. These results provide a novel mechanistic insight for AE-impaired wound healing that involves the necessary roles of 14S,21-diHDHA. They also offer leads for developing 14S,21-diHDHA-related therapeutics to ameliorate AE-impairment of wound healing.
authors.affiliation: Louisiana State University, Health Sciences Center, Center of Neuroscience Excellence, New Orleans, Louisiana 70112, USA.
authors.forename: Haibin
authors.initials: H
authors.lastname: Tian
authors.forename: Yan
authors.initials: Y
authors.lastname: Lu
authors.forename: Shraddha P
authors.initials: SP
authors.lastname: Shah
authors.forename: Song
authors.initials: S
authors.lastname: Hong
mesh_terms: D000435:Alcoholic Intoxication / Q000150:complications / Q000188:drug therapy*; D000818:Animals; D001092:Arachidonate 12-Lipoxygenase / Q000187:drug effects; D002465:Cell Movement; D004281:Docosahexaenoic Acids / Q000031:analogs & derivatives / Q000494:pharmacology / Q000627:therapeutic use*; D042783:Endothelial Cells; D000431:Ethanol / Q000009:adverse effects*; D051379:Mice; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D010766:Phosphorylation; D014945:Wound Healing / Q000187:drug effects*; D048051:p38 Mitogen-Activated Protein Kinases
chemical_list: D004281:Docosahexaenoic Acids; D000431:Ethanol; D001092:Arachidonate 12-Lipoxygenase; D048051:p38 Mitogen-Activated Protein Kinases