Journal
JOURNAL OF CELLULAR BIOCHEMISTRY
Volume 111, Issue 2, Pages 266-273Publisher
WILEY
DOI: 10.1002/jcb.22709
Keywords
ACUTE ETHANOL INTOXICATION/EXPOSURE; 14S,21-DI-HYDROXY-DOCOSAHEXAENOIC ACID; WOUND HEALING; ANGIOGENESIS; VEGF; ENDOTHELIAL CELLS; RE-EPITHELIALIZATION; P38 MAPK
Categories
Funding
- NIH [1R01DK087800]
- Center of Neuroscience Excellence, LSUHSC-New Orleans
- LSUHSC-New Orleans
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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. J. Cell. Biochem. 111: 266273, 2010. (C) 2010 Wiley-Liss, Inc.
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